/* ==========================================================================
   GUANNY.XYZ - 3D SHATTER & BREAKTHROUGH DESIGN SYSTEM
   Based on MSI 20 Visual Analysis:
   - Vibrant Red (#FF2A1B)
   - Solid Black (#1A1A1A)
   - Light Ice Grey & White (#FFFFFF ~ #E5E5E5)
   - Shadow Grey (#808080 ~ #4A4A4A)
   ========================================================================== */

@font-face {
    font-family: 'Syne Fallback';
    src: local('Arial Black'), local('Impact'), local('Arial');
    ascent-override: 95%;
    descent-override: 25%;
    line-gap-override: 0%;
    size-adjust: 100%;
}

@font-face {
    font-family: 'Syne Fallback';
    src: local('Arial'), local('Helvetica'), local('sans-serif');
    ascent-override: 95%;
    descent-override: 25%;
    line-gap-override: 0%;
    size-adjust: 104%;
}

:root {
    /* Palette Tokens */
    --color-accent-red: #FF2A1B;
    --color-accent-red-glow: rgba(255, 42, 27, 0.45);
    --color-accent-red-soft: rgba(255, 42, 27, 0.12);
    --color-black: #111111;
    --color-black-pure: #0a0a0c;
    --color-dark-grey: #242426;
    --color-shadow-grey: #686870;
    --color-light-grey: #E5E8EC;
    --color-white: #FFFFFF;
    --color-glass-surface: rgba(255, 255, 255, 0.72);
    --color-glass-border: rgba(17, 17, 17, 0.14);

    /* Fonts */
    --font-display: 'Syne', 'Syne Fallback', 'Space Grotesk', -apple-system, sans-serif;
    --font-heading: 'Space Grotesk', -apple-system, sans-serif;
    --font-mono: 'Rajdhani', 'JetBrains Mono', monospace;
    --font-body: 'Inter', -apple-system, sans-serif;

    /* Theme Variables - Default: ICE GLASS (High-key White/Red/Black per report) */
    --bg-base: #F0F2F5;
    --bg-gradient: radial-gradient(circle at 35% 45%, #ffffff 0%, #ebedf2 60%, #dfe3e8 100%);
    --text-primary: #111111;
    --text-secondary: #585860;
    --card-bg: rgba(255, 255, 255, 0.82);
    --hud-border: rgba(17, 17, 17, 0.2);
    --header-bg: rgba(240, 242, 245, 0.75);
    --drawer-bg: rgba(248, 249, 251, 0.94);
    --title-shadow: 0 10px 40px rgba(0, 0, 0, 0.08);
}

/* Dark Obsidian Theme */
body.theme-obsidian {
    --bg-base: #0B0B0E;
    --bg-gradient: radial-gradient(circle at 35% 45%, #181820 0%, #0d0d12 65%, #050507 100%);
    --text-primary: #F4F4F6;
    --text-secondary: #90909E;
    --card-bg: rgba(20, 20, 26, 0.85);
    --hud-border: rgba(255, 255, 255, 0.15);
    --header-bg: rgba(11, 11, 14, 0.75);
    --drawer-bg: rgba(14, 14, 18, 0.96);
    --title-shadow: 0 10px 50px rgba(255, 42, 27, 0.25);
    --color-glass-border: rgba(255, 255, 255, 0.12);
}

/* ==========================================================================
   Base & Reset
   ========================================================================== */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

html, body {
    width: 100%;
    height: 100%;
    overflow: hidden;
    background: var(--bg-base);
    color: var(--text-primary);
    font-family: var(--font-body);
    transition: background-color 0.4s ease, color 0.4s ease;
    user-select: none;
}

/* ==========================================================================
   Background & Atmospheric Overlays
   ========================================================================== */
.bg-atmosphere {
    position: fixed;
    inset: 0;
    background: var(--bg-gradient);
    z-index: 0;
    pointer-events: none;
}

/* Asymmetric Red Splash at Left-Center (MSI Style) */
.bg-red-burst {
    position: absolute;
    width: 65vw;
    height: 65vw;
    max-width: 900px;
    max-height: 900px;
    left: 10%;
    top: 42%;
    transform: translate(-30%, -50%);
    background: radial-gradient(
        circle,
        rgba(255, 42, 27, 0.38) 0%,
        rgba(255, 42, 27, 0.18) 35%,
        rgba(255, 42, 27, 0.05) 60%,
        transparent 80%
    );
    filter: blur(40px);
    mix-blend-mode: multiply;
    animation: burstPulse 6s ease-in-out infinite alternate;
    pointer-events: none;
}

body.theme-obsidian .bg-red-burst {
    mix-blend-mode: screen;
    background: radial-gradient(
        circle,
        rgba(255, 42, 27, 0.55) 0%,
        rgba(255, 42, 27, 0.25) 40%,
        rgba(255, 42, 27, 0.08) 65%,
        transparent 85%
    );
}

@keyframes burstPulse {
    0% { transform: translate(-30%, -50%) scale(0.95); opacity: 0.85; }
    100% { transform: translate(-30%, -50%) scale(1.08); opacity: 1.0; }
}

/* Grunge Crack SVG Overlay */
.grunge-overlay {
    position: fixed;
    inset: 0;
    z-index: 1;
    pointer-events: none;
    opacity: 0.55;
    mix-blend-mode: overlay;
}

body.theme-obsidian .grunge-overlay {
    opacity: 0.35;
    mix-blend-mode: screen;
}

/* WebGL Canvas */
#webgl-canvas {
    position: fixed;
    inset: 0;
    width: 100%;
    height: 100%;
    z-index: 2;
    cursor: grab;
    touch-action: none;
    -webkit-user-select: none;
    user-select: none;
}

#webgl-canvas:active {
    cursor: grabbing;
}

/* ==========================================================================
   Header & Navigation Bar
   ========================================================================== */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 28px;
    z-index: 90;
    background: var(--header-bg);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    border-bottom: 1px solid var(--color-glass-border);
    transition: background 0.3s ease;
    pointer-events: auto;
}

.brand-wrapper {
    display: flex;
    align-items: center;
    gap: 6px;
    text-decoration: none;
    color: var(--text-primary);
    z-index: 2;
}

.brand-crest {
    position: relative;
    width: 28px;
    height: 28px;
    background: var(--text-primary);
    clip-path: polygon(0 0, 100% 0, 100% 70%, 70% 100%, 0 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-display);
    font-weight: 900;
    font-size: 0.95rem;
    color: var(--bg-base);
    transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1), background 0.3s;
}

.brand-wrapper:hover .brand-crest {
    transform: rotate(-6deg) scale(1.08);
    background: var(--color-accent-red);
    color: #FFFFFF;
}

.brand-title {
    font-family: var(--font-display);
    font-weight: 800;
    font-size: 1.05rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    display: flex;
    align-items: center;
    gap: 6px;
}

.brand-dot {
    width: 6px;
    height: 6px;
    background: var(--color-accent-red);
    border-radius: 50%;
    box-shadow: 0 0 8px var(--color-accent-red);
    animation: blinkDot 1.8s ease-in-out infinite;
}

@keyframes blinkDot {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.3; transform: scale(0.7); }
}

/* Header Center HUD Info - Absolutely Centered with Red Tags and Grey Values */
.header-hud {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 20px;
    font-family: var(--font-mono);
    font-size: 0.78rem;
    letter-spacing: 0.1em;
    pointer-events: auto;
    white-space: nowrap;
    z-index: 1;
}

.hud-item {
    display: flex;
    align-items: center;
    gap: 6px;
}

.hud-tag {
    color: var(--color-accent-red); /* 項目紅色 */
    font-weight: 700;
    letter-spacing: 0.12em;
}

#hud-status-text,
#hud-theme-text,
.hud-energy-val {
    color: #8E8E98; /* 資料文字灰色 */
    font-weight: 600;
    letter-spacing: 0.08em;
    transition: color 0.2s ease;
}

body.theme-obsidian #hud-status-text,
body.theme-obsidian #hud-theme-text,
body.theme-obsidian .hud-energy-val {
    color: #9A9AA4; /* 資料文字灰色 (深色主題) */
}

/* Secondary header actions hidden to keep clean 3 buttons (Sound, Theme, Menu) like Image 2 */
.header-extra-action {
    display: none !important;
}

/* Header Controls Right */
.header-actions {
    display: flex;
    align-items: center;
    gap: 8px;
    z-index: 2;
}

/* Language Switcher Button */
.lang-toggle-btn {
    height: 42px;
    padding: 0 14px;
    background: transparent;
    border: 1px solid var(--color-glass-border);
    color: var(--text-primary);
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    border-radius: 4px;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    transition: all 0.25s ease;
    clip-path: polygon(6px 0, 100% 0, 100% calc(100% - 6px), calc(100% - 6px) 100%, 0 100%, 0 6px);
}

.lang-toggle-btn:hover {
    border-color: var(--color-accent-red);
    color: var(--color-accent-red);
    background: var(--color-accent-red-soft);
    transform: translateY(-2px);
    box-shadow: 0 4px 15px var(--color-accent-red-glow);
}

.lang-toggle-btn .lang-globe {
    font-size: 0.85rem;
}

.icon-btn {
    width: 32px;
    height: 32px;
    background: transparent;
    border: 1px solid var(--color-glass-border);
    color: var(--text-primary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 3px;
    transition: all 0.25s ease;
    position: relative;
    overflow: hidden;
}

.icon-btn:hover {
    border-color: var(--color-accent-red);
    color: var(--color-accent-red);
    background: var(--color-accent-red-soft);
    transform: translateY(-2px);
}

#btn-linktree:hover {
    border-color: #39E09B;
    color: #39E09B;
    background: rgba(57, 224, 155, 0.12);
    box-shadow: 0 4px 15px rgba(57, 224, 155, 0.35);
}

#btn-x:hover {
    border-color: var(--text-primary);
    color: var(--text-primary);
    background: var(--card-bg);
    box-shadow: 0 4px 15px rgba(255, 255, 255, 0.2);
}

.icon-btn svg {
    width: 15px;
    height: 15px;
    transition: transform 0.2s;
}

.icon-btn svg:not([fill="currentColor"]) {
    stroke: currentColor;
    stroke-width: 2;
    fill: none;
}

.icon-btn svg[fill="currentColor"] {
    fill: currentColor;
}

/* Menu Trigger Button */
.menu-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 0 14px;
    height: 32px;
    background: var(--text-primary);
    color: var(--bg-base);
    border: none;
    font-family: var(--font-mono);
    font-weight: 700;
    font-size: 0.78rem;
    letter-spacing: 0.12em;
    cursor: pointer;
    clip-path: polygon(6px 0, 100% 0, 100% calc(100% - 6px), calc(100% - 6px) 100%, 0 100%, 0 6px);
    transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

.menu-btn:hover {
    background: var(--color-accent-red);
    color: #FFFFFF;
    box-shadow: 0 4px 20px var(--color-accent-red-glow);
    transform: translateY(-2px);
}

.hamburger-icon {
    display: flex;
    flex-direction: column;
    gap: 3px;
    width: 13px;
}

.hamburger-line {
    height: 1.5px;
    width: 100%;
    background: currentColor;
    transition: transform 0.25s;
}

/* ==========================================================================
   Hero Cover Main Stage
   ========================================================================== */
.hero-cover {
    position: relative;
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    z-index: 5;
    pointer-events: none; /* Let canvas capture mouse, except buttons */
    touch-action: none;
}

/* HUD Industrial Frame Corners */
.hud-frame-corner {
    position: absolute;
    width: 40px;
    height: 40px;
    border: 2px solid var(--hud-border);
    pointer-events: none;
}

.hud-tl { top: 62px; left: 40px; border-right: none; border-bottom: none; }
.hud-tr { top: 62px; right: 40px; border-left: none; border-bottom: none; }
.hud-bl { bottom: 40px; left: 40px; border-right: none; border-top: none; }
.hud-br { bottom: 40px; right: 40px; border-left: none; border-top: none; }

.hud-data-label {
    position: absolute;
    font-family: var(--font-mono);
    font-size: 0.68rem;
    font-weight: 600;
    letter-spacing: 0.18em;
    color: rgba(255, 255, 255, 0.45);
    z-index: 10;
    white-space: nowrap;
    user-select: none;
    -webkit-user-select: none;
    pointer-events: auto;
    cursor: pointer;
    padding: 4px 8px;
    background: transparent;
    transition: color 0.25s ease, text-shadow 0.25s ease;
}

.hud-data-label:hover {
    color: var(--color-accent-red);
    text-shadow: 0 0 10px var(--color-accent-red-glow);
}

.hud-data-left,
#hud-telemetry-coords {
    left: 0;
    top: 50%;
    transform-origin: center center;
    transform: translateX(calc(85px - 50%)) translateY(-50%) rotate(-90deg);
}

.hud-data-right,
#hud-telemetry-spec {
    right: 0;
    top: 50%;
    transform-origin: center center;
    transform: translateX(calc(50% - 80px)) translateY(-50%) rotate(90deg);
}

/* Central Typography Container with 3D Perspective Tilt */
.hero-typography-box {
    text-align: center;
    position: relative;
    pointer-events: auto;
    margin-top: 0;
    perspective: 1000px;
    transform-style: preserve-3d;
    transition: transform 0.12s cubic-bezier(0.1, 0.8, 0.2, 1);
    user-select: none;
    -webkit-user-select: none;
    width: 100%;
    max-width: 100vw;
    padding: 0 20px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: clamp(5.2rem, 16vw, 13.5rem);
    contain: layout;
}

/* Super Bold Heavy MSI-Style Typography: Single Horizontal Line */
.main-title {
    font-family: var(--font-display);
    font-weight: 800;
    text-transform: uppercase;
    position: relative;
    display: inline-flex;
    flex-direction: row;
    align-items: baseline;
    justify-content: center;
    width: auto;
    max-width: 96vw;
    margin: 0 auto;
    padding: 0;
    cursor: pointer;
    pointer-events: auto;
    font-size: clamp(2.8rem, 11vw, 9.6rem);
    line-height: 1;
    letter-spacing: clamp(0.01em, 0.3vw, 0.04em);
    white-space: nowrap;
    filter: drop-shadow(0 0 50px rgba(255, 42, 27, 0.5));
    transition: transform 0.2s cubic-bezier(0.16, 1, 0.3, 1), filter 0.2s ease;
    min-height: 1.05em;
    contain: layout style;
}

.main-title:hover {
    transform: scale(1.015);
    filter: drop-shadow(0 0 60px rgba(255, 42, 27, 0.85));
}

.main-title:active {
    transform: scale(0.985);
}

/* Luminous Reassembly Convergence Flare */
@keyframes titleReassembleGlow {
    0% {
        filter: drop-shadow(0 0 90px rgba(255, 255, 255, 1)) drop-shadow(0 0 140px rgba(255, 42, 27, 0.95)) brightness(2.0);
        transform: scale(1.06);
    }
    40% {
        filter: drop-shadow(0 0 75px rgba(255, 42, 27, 0.95)) brightness(1.3);
        transform: scale(0.985);
    }
    100% {
        filter: drop-shadow(0 0 50px rgba(255, 42, 27, 0.5));
        transform: scale(1);
    }
}

.main-title.reassemble-glow-pulse {
    animation: titleReassembleGlow 0.75s cubic-bezier(0.16, 1, 0.3, 1) forwards !important;
}

/* Red "G" on the left */
.title-layer-g {
    display: inline-flex;
    align-items: baseline;
    position: relative;
    transform-style: preserve-3d;
    line-height: 1;
    z-index: 2;
}

.title-layer-g .char-accent {
    color: var(--color-accent-red);
    display: inline-block;
    position: relative;
    font-weight: 800;
    line-height: 1;
    vertical-align: baseline;
    letter-spacing: -0.02em;
    min-width: 0.72em;
    text-align: center;
    text-shadow: 0 0 35px var(--color-accent-red-glow), 0 0 70px rgba(255, 42, 27, 0.4);
}

/* Red Underline Shelf under G extending slightly under U */
.title-layer-g .char-accent::after {
    content: '';
    position: absolute;
    bottom: 2%;
    left: -8%;
    width: 130%;
    height: clamp(4px, 0.75vw, 9px);
    background: var(--color-accent-red);
    box-shadow: 0 0 16px var(--color-accent-red-glow), 0 0 28px rgba(255, 42, 27, 0.7);
    pointer-events: none;
}

/* Solid White "UANNY" on the right on same baseline */
.title-layer-rest {
    display: inline-block;
    position: relative;
    transform-style: preserve-3d;
    font-weight: 800;
    line-height: 1;
    vertical-align: baseline;
    color: #FFFFFF;
    text-shadow: 0 0 30px rgba(255, 255, 255, 0.4), 0 8px 35px rgba(0, 0, 0, 0.85);
    z-index: 1;
    white-space: nowrap;
}

body:not(.theme-obsidian) .title-layer-rest {
    color: #111111;
    text-shadow: 0 8px 30px rgba(0, 0, 0, 0.15);
}

/* Sub-Headline: Centered with flanking subtle divider lines */
.hero-meta-row {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    margin-top: 18px;
    font-family: var(--font-mono);
    font-size: clamp(0.72rem, 1.1vw, 0.95rem);
    letter-spacing: clamp(0.14em, 0.35vw, 0.26em);
    text-transform: uppercase;
    color: rgba(255, 255, 255, 0.7);
    position: relative;
}

.hero-meta-row::before,
.hero-meta-row::after {
    content: '';
    display: block;
    width: clamp(20px, 4vw, 55px);
    height: 1px;
    background: rgba(255, 255, 255, 0.22);
}

.hero-meta-row .accent-sep {
    color: var(--color-accent-red);
    font-weight: 700;
}

/* ==========================================================================
   Tactile Esports [ENTER] Button (Matching Image 2)
   ========================================================================== */
.hero-cta {
    margin-top: 34px;
    pointer-events: auto;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    z-index: 10;
    contain: layout;
}

/* Tactile Cyber Esports [ENTER] Button (Matching User Reference) */
.enter-btn {
    --enter-c: 20px;
    --enter-border-color: #FFFFFF;
    --enter-text-color: #FFFFFF;
    --enter-bg-color: #141418;
    
    position: relative;
    background: transparent;
    border: none;
    outline: none;
    cursor: pointer;
    padding: 0;
    min-width: 290px;
    height: 58px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    transition: transform 0.22s cubic-bezier(0.16, 1, 0.3, 1), filter 0.22s ease;
    user-select: none;
    -webkit-user-select: none;
}

/* Light Theme Variables */
body:not(.theme-obsidian) .enter-btn {
    --enter-border-color: #000000;
    --enter-text-color: #000000;
    --enter-bg-color: #FFFFFF;
}

/* Button Background Polygon with Chamfered TL & BR */
.enter-btn-bg {
    position: absolute;
    inset: 0;
    background-color: var(--enter-bg-color);
    clip-path: polygon(
        var(--enter-c) 0,
        100% 0,
        100% calc(100% - var(--enter-c)),
        calc(100% - var(--enter-c)) 100%,
        0 100%,
        0 var(--enter-c)
    );
    z-index: 1;
    transition: background-color 0.25s ease, box-shadow 0.25s ease;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.4);
}

body:not(.theme-obsidian) .enter-btn-bg {
    box-shadow: 0 4px 18px rgba(0, 0, 0, 0.12);
}

/* Top-Left Red Chamfer Triangle */
.enter-corner-tl {
    position: absolute;
    top: 0;
    left: 0;
    width: var(--enter-c);
    height: var(--enter-c);
    background-color: var(--color-accent-red);
    clip-path: polygon(0 100%, 100% 0, 100% 100%);
    z-index: 2;
    transition: filter 0.25s ease;
}

/* Bottom-Right Red Chamfer Triangle */
.enter-corner-br {
    position: absolute;
    bottom: 0;
    right: 0;
    width: var(--enter-c);
    height: var(--enter-c);
    background-color: var(--color-accent-red);
    clip-path: polygon(0 0, 100% 0, 0 100%);
    z-index: 2;
    transition: filter 0.25s ease;
}

/* Top & Right Border Segment */
.enter-border-tr {
    position: absolute;
    top: 0;
    right: 0;
    left: var(--enter-c);
    bottom: var(--enter-c);
    border-top: 2.5px solid var(--enter-border-color);
    border-right: 2.5px solid var(--enter-border-color);
    pointer-events: none;
    z-index: 3;
    transition: border-color 0.25s ease;
}

/* Bottom & Left Border Segment */
.enter-border-bl {
    position: absolute;
    bottom: 0;
    left: 0;
    right: var(--enter-c);
    top: var(--enter-c);
    border-bottom: 2.5px solid var(--enter-border-color);
    border-left: 2.5px solid var(--enter-border-color);
    pointer-events: none;
    z-index: 3;
    transition: border-color 0.25s ease;
}

/* Button Content Row: [ ENTER ] + Red Arrow */
.enter-btn-content {
    position: relative;
    z-index: 4;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 24px;
    width: 100%;
    height: 100%;
    padding: 0 34px;
}

.enter-btn-text {
    font-family: var(--font-mono);
    font-weight: 800;
    font-size: clamp(1.1rem, 1.8vw, 1.35rem);
    letter-spacing: 0.22em;
    color: var(--enter-text-color);
    text-transform: uppercase;
    white-space: nowrap;
    text-indent: 0.12em;
    transition: color 0.25s ease;
}

.enter-btn-arrow {
    color: var(--color-accent-red);
    width: 26px;
    height: 16px;
    flex-shrink: 0;
    transition: transform 0.25s cubic-bezier(0.16, 1, 0.3, 1), filter 0.25s ease;
}

/* Hover Dynamics */
.enter-btn:hover {
    transform: translateY(-2px);
    filter: drop-shadow(0 6px 20px rgba(255, 42, 27, 0.28));
}

.enter-btn:hover .enter-btn-arrow {
    transform: translateX(5px);
    filter: drop-shadow(0 0 6px var(--color-accent-red-glow));
}

.enter-btn:hover .enter-corner-tl,
.enter-btn:hover .enter-corner-br {
    filter: drop-shadow(0 0 6px var(--color-accent-red-glow));
}

/* Active State */
.enter-btn:active {
    transform: translateY(0) scale(0.97);
}

/* Mobile Responsiveness */
@media (max-width: 480px) {
    .enter-btn {
        --enter-c: 16px;
        min-width: 240px;
        height: 48px;
    }
    .enter-btn-content {
        gap: 16px;
        padding: 0 24px;
    }
    .enter-btn-text {
        font-size: 1.0rem;
        letter-spacing: 0.18em;
    }
    .enter-btn-arrow {
        width: 22px;
        height: 14px;
    }
}

.enter-hint {
    font-family: var(--font-mono);
    font-size: 0.68rem;
    letter-spacing: 0.18em;
    color: rgba(255, 255, 255, 0.45);
    text-transform: uppercase;
}

body:not(.theme-obsidian) .enter-hint {
    color: rgba(0, 0, 0, 0.5);
}

/* Interaction Chips (Image 2 style) */
.interaction-hints {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    margin-top: 6px;
    flex-wrap: wrap;
}

.hint-chip {
    background: rgba(18, 18, 22, 0.65);
    border: 1px solid rgba(255, 255, 255, 0.14);
    border-radius: 3px;
    padding: 5px 14px;
    font-family: var(--font-mono);
    font-size: 0.72rem;
    letter-spacing: 0.12em;
    color: rgba(255, 255, 255, 0.85);
    display: inline-flex;
    align-items: center;
    cursor: pointer;
    transition: all 0.2s ease;
    backdrop-filter: blur(6px);
}

.hint-chip .hint-bullet {
    color: var(--color-accent-red);
    margin-right: 6px;
    font-size: 0.85rem;
}

.hint-chip:hover {
    background: rgba(255, 42, 27, 0.15);
    border-color: var(--color-accent-red);
    color: #FFFFFF;
    box-shadow: 0 0 12px var(--color-accent-red-glow);
}

/* ==========================================================================
   Slide-in Navigation Drawer (Menu)
   ========================================================================== */
.menu-drawer {
    position: fixed;
    top: 0;
    right: 0;
    width: 100%;
    max-width: 440px;
    height: 100%;
    background: #09090c;
    backdrop-filter: blur(28px);
    -webkit-backdrop-filter: blur(28px);
    border-left: 1px solid rgba(255, 255, 255, 0.15);
    z-index: 100;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    padding: 32px 28px;
    transform: translateX(105%);
    transition: transform 0.45s cubic-bezier(0.16, 1, 0.3, 1);
    box-shadow: -20px 0 60px rgba(0, 0, 0, 0.6);
}

.menu-drawer.active {
    transform: translateX(0);
}

/* Drawer Backdrop */
.drawer-backdrop {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.55);
    backdrop-filter: blur(6px);
    -webkit-backdrop-filter: blur(6px);
    z-index: 99;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.35s ease;
}

.drawer-backdrop.active {
    opacity: 1;
    pointer-events: auto;
}

.drawer-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-bottom: 24px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.12);
}

.drawer-title {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    font-weight: 700;
    letter-spacing: 0.2em;
    color: rgba(255, 255, 255, 0.45);
}

.close-btn {
    width: 38px;
    height: 38px;
    background: transparent;
    border: 1px solid rgba(255, 255, 255, 0.15);
    color: #FFFFFF;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 0;
    transition: all 0.2s ease;
}

.close-btn:hover {
    background: var(--color-accent-red);
    color: #FFFFFF;
    border-color: var(--color-accent-red);
    box-shadow: 0 0 12px var(--color-accent-red-glow);
}

/* Energy Floating Particles on Click */
.energy-floater {
    position: fixed;
    transform: translate(-50%, -100%);
    font-family: var(--font-mono);
    font-weight: 800;
    font-size: 1.05rem;
    color: var(--color-accent-red);
    text-shadow: 0 0 12px var(--color-accent-red-glow);
    pointer-events: none;
    z-index: 9999;
    user-select: none;
    -webkit-user-select: none;
    animation: floatUpFade 0.75s ease-out forwards;
}

.energy-floater-crit {
    font-size: 1.4rem;
    color: #FFE600;
    text-shadow: 0 0 16px #FF2A1B, 0 0 28px #FFE600;
    letter-spacing: 0.08em;
    animation: floatCritUpFade 0.95s cubic-bezier(0.18, 0.9, 0.3, 1) forwards;
}

@keyframes floatUpFade {
    0% { opacity: 0; transform: translate(-50%, 0) scale(0.8); }
    25% { opacity: 1; transform: translate(-50%, -20px) scale(1.1); }
    100% { opacity: 0; transform: translate(-50%, -60px) scale(0.95); }
}

@keyframes floatCritUpFade {
    0% { opacity: 0; transform: translate(-50%, 0) scale(0.7); }
    25% { opacity: 1; transform: translate(-50%, -25px) scale(1.3); }
    45% { transform: translate(-50%, -35px) scale(1.15) rotate(-3deg); }
    65% { transform: translate(-50%, -48px) scale(1.2) rotate(3deg); }
    100% { opacity: 0; transform: translate(-50%, -85px) scale(1.0); }
}

/* Drawer Navigation Links (Compact & Scalable for Future Tabs) */
.drawer-nav-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin: 0;
    padding: 6px 4px 6px 0;
    flex: 1;
    overflow-y: auto;
    scrollbar-width: thin;
    scrollbar-color: rgba(255, 42, 27, 0.4) transparent;
}

.drawer-nav-list::-webkit-scrollbar {
    width: 4px;
}

.drawer-nav-list::-webkit-scrollbar-track {
    background: transparent;
}

.drawer-nav-list::-webkit-scrollbar-thumb {
    background: rgba(255, 42, 27, 0.4);
    border-radius: 2px;
}

.drawer-nav-item {
    position: relative;
}

.drawer-nav-link {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 14px;
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-left: 3px solid transparent;
    border-radius: 2px;
    color: #FFFFFF;
    text-decoration: none;
    transition: all 0.22s cubic-bezier(0.16, 1, 0.3, 1);
    cursor: pointer;
}

.drawer-nav-link:hover {
    background: rgba(255, 42, 27, 0.08);
    border-color: rgba(255, 42, 27, 0.35);
    border-left-color: var(--color-accent-red);
    transform: translateX(4px);
}

.drawer-nav-link.active {
    background: rgba(255, 42, 27, 0.12);
    border-color: rgba(255, 42, 27, 0.5);
    border-left-color: var(--color-accent-red);
}

.drawer-nav-link .nav-text {
    font-family: var(--font-display);
    font-size: clamp(1.05rem, 1.5vw, 1.25rem);
    font-weight: 800;
    letter-spacing: 0.04em;
    line-height: 1.25;
    color: #FFFFFF;
    transition: color 0.2s ease;
    flex: 1;
    word-break: break-word;
}

.drawer-nav-link .nav-num {
    font-family: var(--font-mono);
    font-size: 0.82rem;
    font-weight: 800;
    color: var(--color-accent-red);
    margin-right: 8px;
    display: inline-block;
    vertical-align: baseline;
}

.drawer-nav-link .nav-stub-tag,
.drawer-nav-link .nav-active-tag {
    font-family: var(--font-mono);
    font-size: 0.65rem;
    font-weight: 700;
    letter-spacing: 0.12em;
    color: rgba(255, 255, 255, 0.45);
    border: 1px solid rgba(255, 255, 255, 0.15);
    background: transparent;
    padding: 2px 6px;
    border-radius: 2px;
    margin-left: 8px;
    flex-shrink: 0;
    transition: all 0.2s ease;
}

/* Active State (Only when on the current active page) */
.drawer-nav-link.active .nav-active-tag {
    color: var(--color-accent-red);
    border-color: var(--color-accent-red);
    background: rgba(255, 42, 27, 0.12);
    box-shadow: 0 0 8px rgba(255, 42, 27, 0.3);
}

.drawer-nav-link:hover .nav-active-tag {
    background: var(--color-accent-red);
    border-color: var(--color-accent-red);
    color: #ffffff;
    box-shadow: 0 0 14px var(--color-accent-red-glow);
}

.drawer-nav-link:hover .nav-text {
    color: var(--color-accent-red);
    text-shadow: 0 0 12px var(--color-accent-red-glow);
}

.drawer-nav-link:hover .nav-stub-tag {
    border-color: rgba(255, 255, 255, 0.35);
    color: rgba(255, 255, 255, 0.85);
}

/* Drawer Accordion & Web3 Sub-Navigation */
.drawer-nav-accordion {
    display: flex;
    flex-direction: column;
}

.drawer-accordion-header {
    cursor: pointer;
    user-select: none;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-accordion-badge {
    font-family: var(--font-mono);
    font-size: 0.62rem;
    font-weight: 700;
    letter-spacing: 0.1em;
    padding: 2px 6px;
    border-radius: 2px;
    background: rgba(255, 42, 27, 0.15);
    border: 1px solid rgba(255, 42, 27, 0.4);
    color: var(--color-accent-red);
    margin-left: auto;
    margin-right: 8px;
    white-space: nowrap;
}

.nav-accordion-arrow {
    font-size: 0.75rem;
    color: rgba(255, 255, 255, 0.5);
    transition: transform 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

.drawer-nav-accordion.expanded .nav-accordion-arrow {
    transform: rotate(180deg);
    color: var(--color-accent-red);
}

.drawer-subnav-list {
    list-style: none;
    margin: 6px 0 0 10px;
    padding: 6px 0 6px 12px;
    border-left: 2px dashed rgba(255, 42, 27, 0.35);
    display: flex;
    flex-direction: column;
    gap: 7px;
    transition: all 0.3s ease;
}

.drawer-nav-accordion:not(.expanded) .drawer-subnav-list {
    display: none;
}

.drawer-subnav-item {
    position: relative;
}

.drawer-subnav-link {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
    padding: 8px 12px;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 2px;
    text-decoration: none;
    color: #FFFFFF;
    transition: all 0.22s cubic-bezier(0.16, 1, 0.3, 1);
    cursor: pointer;
}

.drawer-subnav-link:hover {
    background: rgba(255, 42, 27, 0.12);
    border-color: rgba(255, 42, 27, 0.45);
    border-left: 2px solid var(--color-accent-red);
    transform: translateX(4px);
    box-shadow: 0 4px 15px rgba(255, 42, 27, 0.2);
}

.drawer-subnav-link.active {
    background: rgba(255, 42, 27, 0.18);
    border-color: var(--color-accent-red);
    border-left: 3px solid var(--color-accent-red);
}

.subnav-indicator {
    font-family: var(--font-mono);
    color: var(--color-accent-red);
    font-size: 0.8rem;
    flex-shrink: 0;
}

.subnav-info {
    display: flex;
    flex-direction: column;
    flex: 1;
    min-width: 0;
}

.subnav-title {
    font-family: var(--font-display);
    font-size: 0.88rem;
    font-weight: 700;
    color: #FFFFFF;
    letter-spacing: 0.02em;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    transition: color 0.2s ease;
}

.drawer-subnav-link:hover .subnav-title {
    color: var(--color-accent-red);
}

.subnav-desc {
    font-family: var(--font-mono);
    font-size: 0.65rem;
    color: rgba(255, 255, 255, 0.55);
    letter-spacing: 0.04em;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.subnav-gate-tag {
    font-family: var(--font-mono);
    font-size: 0.62rem;
    font-weight: 700;
    padding: 2px 6px;
    background: rgba(0, 0, 0, 0.4);
    border: 1px solid rgba(255, 42, 27, 0.45);
    color: var(--color-accent-red);
    border-radius: 2px;
    white-space: nowrap;
    flex-shrink: 0;
}

.subnav-hub-link {
    background: rgba(255, 42, 27, 0.08);
    border-color: rgba(255, 42, 27, 0.3);
}

.subnav-hub-arrow {
    font-family: var(--font-mono);
    font-size: 0.68rem;
    font-weight: 800;
    color: var(--color-accent-red);
    flex-shrink: 0;
}

/* Drawer Footer */
.drawer-footer {
    padding-top: 18px;
    margin-top: 16px;
    border-top: 1px solid rgba(255, 255, 255, 0.12);
}

.drawer-socials {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 12px;
    margin-bottom: 14px;
}

.social-link {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    letter-spacing: 0.15em;
    color: rgba(255, 255, 255, 0.45);
    text-decoration: none;
    transition: color 0.2s ease;
}

.social-link:hover {
    color: var(--color-accent-red);
}

.drawer-copy-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
}

.drawer-copy {
    font-family: var(--font-mono);
    font-size: 0.72rem;
    letter-spacing: 0.08em;
    color: rgba(255, 255, 255, 0.35);
}

.drawer-lang-btn {
    height: 24px;
    padding: 0 8px;
    background: transparent;
    border: 1px solid rgba(255, 255, 255, 0.15);
    color: rgba(255, 255, 255, 0.5);
    font-family: var(--font-mono);
    font-size: 0.68rem;
    font-weight: 700;
    letter-spacing: 0.1em;
    border-radius: 2px;
    cursor: pointer;
    transition: all 0.2s ease;
}

.drawer-lang-btn:hover {
    border-color: var(--color-accent-red);
    color: #FFFFFF;
    background: var(--color-accent-red);
    box-shadow: 0 0 10px var(--color-accent-red-glow);
}

/* ==========================================================================
   Enter Transition Modal (When [ENTER] clicked)
   ========================================================================== */
.enter-modal {
    position: fixed;
    inset: 0;
    z-index: 150;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(10, 10, 14, 0.82);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.4s ease;
}

.enter-modal.active {
    opacity: 1;
    pointer-events: auto;
}

.enter-card {
    position: relative;
    max-width: 520px;
    width: 90%;
    max-height: 92vh;
    overflow-y: auto;
    padding: 38px 32px;
    background: var(--drawer-bg);
    border: 2px solid var(--color-accent-red);
    box-shadow: 0 15px 60px var(--color-accent-red-glow);
    clip-path: polygon(16px 0, 100% 0, 100% calc(100% - 16px), calc(100% - 16px) 100%, 0 100%, 0 16px);
    text-align: center;
    transform: scale(0.92);
    transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.enter-modal.active .enter-card {
    transform: scale(1);
}

.enter-card-status {
    display: inline-block;
    font-family: var(--font-mono);
    font-size: 0.85rem;
    font-weight: 700;
    letter-spacing: 0.2em;
    color: var(--color-accent-red);
    margin-bottom: 12px;
}

.enter-card-title {
    font-family: var(--font-display);
    font-size: 2.2rem;
    font-weight: 800;
    color: var(--text-primary);
    margin-bottom: 14px;
}

.enter-card-desc {
    font-size: 0.95rem;
    line-height: 1.6;
    color: var(--text-secondary);
    margin-bottom: 20px;
}

/* Featured Entry Card to Design Manifesto & Signknature */
.enter-manifesto-card {
    display: block;
    margin: 0 auto 12px auto;
    max-width: 440px;
    width: 100%;
    padding: 14px 18px;
    background: rgba(255, 42, 27, 0.08);
    border: 1px solid rgba(255, 42, 27, 0.45);
    clip-path: polygon(8px 0, 100% 0, 100% calc(100% - 8px), calc(100% - 8px) 100%, 0 100%, 0 8px);
    text-align: left;
    text-decoration: none;
    transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
    box-shadow: 0 4px 20px rgba(255, 42, 27, 0.18);
}

.enter-manifesto-card:hover {
    background: rgba(255, 42, 27, 0.18);
    border-color: var(--color-accent-red);
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(255, 42, 27, 0.45);
}

.enter-signknature-card {
    background: rgba(255, 42, 27, 0.12);
    border: 1px solid rgba(255, 42, 27, 0.65);
    box-shadow: 0 4px 24px rgba(255, 42, 27, 0.26);
}

.enter-signknature-card:hover {
    background: rgba(255, 42, 27, 0.22);
    border-color: var(--color-accent-red);
    transform: translateY(-2px);
    box-shadow: 0 8px 36px rgba(255, 42, 27, 0.58);
}

.manifesto-card-tag {
    font-family: var(--font-mono);
    font-size: 0.72rem;
    font-weight: 800;
    letter-spacing: 0.16em;
    color: var(--color-accent-red);
    margin-bottom: 6px;
    display: flex;
    align-items: center;
    gap: 6px;
}

.manifesto-card-headline {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
}

.manifesto-card-title {
    font-family: var(--font-display);
    font-size: 1.12rem;
    font-weight: 800;
    letter-spacing: 0.04em;
    color: var(--text-primary);
}

.manifesto-card-arrow {
    font-family: var(--font-mono);
    font-size: 0.78rem;
    font-weight: 800;
    color: var(--color-accent-red);
    letter-spacing: 0.1em;
    padding: 3px 8px;
    background: rgba(255, 42, 27, 0.15);
    border: 1px solid rgba(255, 42, 27, 0.4);
    border-radius: 2px;
    white-space: nowrap;
    transition: all 0.2s ease;
}

.enter-manifesto-card:hover .manifesto-card-arrow {
    background: var(--color-accent-red);
    color: #ffffff;
    box-shadow: 0 0 10px var(--color-accent-red-glow);
}

.manifesto-card-sub {
    font-size: 0.82rem;
    color: var(--text-secondary);
    margin-top: 6px;
    font-family: var(--font-body);
    line-height: 1.4;
}

.enter-card-actions {
    display: flex;
    gap: 14px;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
}

.enter-linktree-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 14px 28px;
    background: #39E09B;
    color: #0E1A14;
    text-decoration: none;
    font-family: var(--font-mono);
    font-weight: 800;
    font-size: 0.95rem;
    letter-spacing: 0.12em;
    cursor: pointer;
    border: 1px solid #39E09B;
    clip-path: polygon(8px 0, 100% 0, 100% calc(100% - 8px), calc(100% - 8px) 100%, 0 100%, 0 8px);
    transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
    box-shadow: 0 4px 20px rgba(57, 224, 155, 0.35);
    user-select: none;
}

.enter-linktree-btn:hover {
    background: #46f2a8;
    border-color: #46f2a8;
    color: #050d09;
    transform: translateY(-3px) scale(1.02);
    box-shadow: 0 8px 30px rgba(57, 224, 155, 0.6), 0 0 15px rgba(57, 224, 155, 0.4);
}

.enter-linktree-btn:active {
    transform: translateY(0) scale(0.98);
}

.enter-linktree-btn .linktree-icon {
    width: 18px;
    height: 18px;
    fill: currentColor;
    flex-shrink: 0;
    transition: transform 0.25s ease;
}

.enter-linktree-btn:hover .linktree-icon {
    transform: rotate(15deg) scale(1.12);
}

.enter-linktree-btn .enter-link-arrow {
    display: inline-block;
    font-size: 1.15rem;
    font-weight: 900;
    line-height: 1;
    transition: transform 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

.enter-linktree-btn:hover .enter-link-arrow {
    transform: translate(3px, -3px);
}

.enter-x-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 14px 26px;
    background: #000000;
    color: #ffffff;
    text-decoration: none;
    font-family: var(--font-mono);
    font-weight: 800;
    font-size: 0.95rem;
    letter-spacing: 0.12em;
    cursor: pointer;
    border: 1px solid rgba(255, 255, 255, 0.45);
    clip-path: polygon(8px 0, 100% 0, 100% calc(100% - 8px), calc(100% - 8px) 100%, 0 100%, 0 8px);
    transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
    box-shadow: 0 4px 18px rgba(0, 0, 0, 0.4);
    user-select: none;
}

body.theme-obsidian .enter-x-btn {
    background: #0a0a0a;
    border-color: rgba(255, 255, 255, 0.35);
}

.enter-x-btn:hover {
    background: #151515;
    border-color: #ffffff;
    color: #ffffff;
    transform: translateY(-3px) scale(1.02);
    box-shadow: 0 8px 30px rgba(255, 255, 255, 0.25), 0 0 15px rgba(255, 255, 255, 0.15);
}

.enter-x-btn:active {
    transform: translateY(0) scale(0.98);
}

.enter-x-btn .x-icon {
    width: 17px;
    height: 17px;
    fill: currentColor;
    flex-shrink: 0;
    transition: transform 0.25s ease;
}

.enter-x-btn:hover .x-icon {
    transform: scale(1.15) rotate(4deg);
}

.enter-x-btn .enter-link-arrow {
    display: inline-block;
    font-size: 1.15rem;
    font-weight: 900;
    line-height: 1;
    transition: transform 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

.enter-x-btn:hover .enter-link-arrow {
    transform: translate(3px, -3px);
}

.enter-return-btn {
    padding: 14px 28px;
    background: transparent;
    color: var(--text-secondary);
    border: 1px solid var(--color-glass-border);
    font-family: var(--font-mono);
    font-weight: 700;
    font-size: 0.95rem;
    letter-spacing: 0.15em;
    cursor: pointer;
    clip-path: polygon(8px 0, 100% 0, 100% calc(100% - 8px), calc(100% - 8px) 100%, 0 100%, 0 8px);
    transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

.enter-return-btn:hover {
    color: var(--text-primary);
    border-color: var(--text-primary);
    background: var(--card-bg);
    transform: translateY(-2px);
}

/* ==========================================================================
   HUD Toast Notification System
   ========================================================================== */
.hud-toast-container {
    position: fixed;
    bottom: 30px;
    left: 30px;
    right: auto;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
    z-index: 200;
    pointer-events: none;
    max-width: calc(100vw - 60px);
}

.hud-toast {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 20px;
    background: var(--text-primary);
    color: var(--bg-base);
    font-family: var(--font-mono);
    font-size: 0.85rem;
    letter-spacing: 0.15em;
    border-left: 4px solid var(--color-accent-red);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.25);
    transform: translateX(-120%);
    animation: toastSlideInLeft 0.35s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

@keyframes toastSlideInLeft {
    to { transform: translateX(0); }
}

/* ==========================================================================
   Responsive Adaptations
   ========================================================================== */
@media (max-width: 900px) {
    .site-header {
        padding: 0 16px;
        height: 48px;
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: 8px;
    }

    .brand-wrapper {
        flex-shrink: 0;
    }

    .header-hud {
        display: flex !important;
        position: static !important;
        transform: none !important;
        flex: 1 1 auto;
        justify-content: center;
        align-items: center;
        min-width: 0;
        gap: 8px;
    }

    .header-actions {
        flex-shrink: 0;
        display: flex;
        align-items: center;
        gap: 8px;
    }

    .header-hud .hud-item:not(.hud-energy-item) {
        display: none !important;
    }

    .hud-frame-corner {
        display: none;
    }

    .hud-data-label {
        font-size: 0.62rem;
        padding: 4px 10px;
    }

    .hud-data-left,
    #hud-telemetry-coords {
        left: 0;
        transform: translateX(calc(55px - 50%)) translateY(-50%) rotate(-90deg);
    }

    .hud-data-right,
    #hud-telemetry-spec {
        right: 0;
        transform: translateX(calc(50% - 55px)) translateY(-50%) rotate(90deg);
    }

    .menu-drawer {
        max-width: 100%;
        padding: 30px 20px;
    }
}

@media (max-width: 680px) {
    .hud-data-label {
        display: none;
    }

    .main-title {
        font-size: 4rem;
    }

    .hero-meta-row {
        font-size: 0.8rem;
        letter-spacing: 0.15em;
    }

    .enter-btn-inner {
        padding: 12px 30px;
        font-size: 1.1rem;
    }

    .enter-card {
        padding: 34px 20px;
        width: 95%;
    }

    .enter-card-title {
        font-size: 1.8rem;
    }

    .enter-card-actions {
        flex-direction: column;
        width: 100%;
        gap: 12px;
    }

    .enter-linktree-btn,
    .enter-x-btn,
    .enter-return-btn {
        width: 100%;
        box-sizing: border-box;
    }

    .hud-toast-container {
        top: 78px;
        bottom: auto;
        left: 16px;
        max-width: calc(100vw - 32px);
    }
}

/* ==========================================================================
   Interactive HUD Guide & Custom Cyber Crosshair
   ========================================================================== */
.interaction-hints {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    margin-top: 14px;
    font-family: var(--font-mono);
    font-size: 0.72rem;
    letter-spacing: 0.18em;
    color: var(--text-secondary);
    text-transform: uppercase;
    user-select: none;
    pointer-events: auto;
    flex-wrap: wrap;
}

.hint-chip {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 3px 8px;
    background: var(--color-glass-surface);
    border: 1px solid var(--color-glass-border);
    border-radius: 2px;
}

.hint-chip-btn {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    padding: 7px 14px;
    background: var(--card-bg);
    border: 1px solid var(--color-glass-border);
    border-radius: 2px;
    color: var(--text-primary);
    font-family: var(--font-mono);
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 0.14em;
    cursor: pointer;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    transition: all 0.22s cubic-bezier(0.16, 1, 0.3, 1);
    outline: none;
    clip-path: polygon(4px 0, 100% 0, 100% calc(100% - 4px), calc(100% - 4px) 100%, 0 100%, 0 4px);
}

.hint-chip-btn:hover {
    border-color: var(--color-accent-red);
    color: var(--color-accent-red);
    background: var(--color-accent-red-soft);
    transform: translateY(-2px);
    box-shadow: 0 4px 16px var(--color-accent-red-glow);
}

.hint-chip-btn:active {
    transform: translateY(0) scale(0.98);
}

.hint-chip-btn.active {
    background: var(--color-accent-red);
    color: #ffffff;
    border-color: var(--color-accent-red);
    box-shadow: 0 0 16px var(--color-accent-red-glow);
    animation: chipActivePulse 1.4s infinite alternate;
}

.hint-chip-btn.active .hint-dot {
    background: #ffffff;
    box-shadow: 0 0 8px #ffffff;
}

@keyframes chipActivePulse {
    0% { transform: translateY(-1px) scale(1); box-shadow: 0 0 10px var(--color-accent-red-glow); }
    100% { transform: translateY(-2px) scale(1.03); box-shadow: 0 0 22px var(--color-accent-red); }
}

.hint-dot {
    width: 6px;
    height: 6px;
    background: var(--color-accent-red);
    border-radius: 50%;
    transition: background 0.2s, box-shadow 0.2s;
}

/* Custom Cyber HUD Cursor */
.custom-cursor {
    position: fixed;
    top: 0;
    left: 0;
    width: 36px;
    height: 36px;
    pointer-events: none;
    z-index: 9999;
    transform: translate(-50%, -50%);
    transition: width 0.2s cubic-bezier(0.16, 1, 0.3, 1),
                height 0.2s cubic-bezier(0.16, 1, 0.3, 1),
                opacity 0.2s;
    opacity: 0;
}

.custom-cursor.active {
    opacity: 1;
}

.cursor-dot {
    position: absolute;
    top: 50%;
    left: 50%;
    width: 6px;
    height: 6px;
    background: var(--color-accent-red);
    transform: translate(-50%, -50%);
    border-radius: 50%;
    box-shadow: 0 0 8px var(--color-accent-red);
    transition: transform 0.2s, background 0.2s;
}

.cursor-crosshair {
    position: absolute;
    inset: 0;
    border: 1.5px solid var(--text-primary);
    border-radius: 50%;
    opacity: 0.5;
    transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

.cursor-coords {
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    margin-top: 6px;
    font-family: var(--font-mono);
    font-size: 0.65rem;
    letter-spacing: 0.1em;
    color: var(--color-accent-red);
    white-space: nowrap;
    opacity: 0.8;
}

/* Cursor state when hovering over interactive targets */
.custom-cursor.hovering {
    width: 52px;
    height: 52px;
}

.custom-cursor.hovering .cursor-crosshair {
    border-color: var(--color-accent-red);
    opacity: 1;
    transform: rotate(45deg);
    border-radius: 2px;
    box-shadow: 0 0 15px var(--color-accent-red-glow);
}

.custom-cursor.hovering .cursor-dot {
    transform: translate(-50%, -50%) scale(1.6);
}

/* Hide custom cursor on mobile touch */
@media (hover: none) and (pointer: coarse) {
    .custom-cursor {
        display: none !important;
    }
}

/* ==========================================================================
   Real-Time Energy HUD Telemetry & Low Energy Warnings
   ========================================================================== */
.hud-energy-item {
    display: flex;
    align-items: center;
    gap: 6px;
    cursor: pointer;
    padding: 2px 6px;
    border-radius: 3px;
    border: 1px solid transparent;
    transition: all 0.2s ease;
    user-select: none;
    outline: none;
}

.hud-energy-item:hover {
    border-color: var(--color-accent-red);
    background: var(--color-accent-red-soft);
    box-shadow: 0 0 12px var(--color-accent-red-soft);
}

.hud-energy-hint {
    font-size: 0.65rem;
    font-weight: 700;
    color: var(--color-accent-red);
    opacity: 0;
    transform: translateX(-4px);
    transition: all 0.2s ease;
    white-space: nowrap;
}

.hud-energy-item:hover .hud-energy-hint {
    opacity: 1;
    transform: translateX(0);
}

.hud-energy-val {
    color: #8E8E98; /* 資料文字灰色 */
    font-weight: 600;
    min-width: 44px;
    letter-spacing: 0.08em;
    transition: color 0.2s, text-shadow 0.2s;
}

body.theme-obsidian .hud-energy-val {
    color: #9A9AA4; /* 資料文字灰色 (深色主題) */
}

.hud-energy-item:hover .hud-energy-val {
    color: #FFFFFF;
    text-shadow: 0 0 8px rgba(255, 255, 255, 0.6);
}

.hud-energy-track {
    width: 44px;
    height: 4px;
    background: rgba(17, 17, 17, 0.15);
    border: 1px solid var(--color-glass-border);
    border-radius: 2px;
    overflow: hidden;
    position: relative;
}

body.theme-obsidian .hud-energy-track {
    background: rgba(255, 255, 255, 0.12);
}

.hud-energy-fill {
    height: 100%;
    background: var(--color-accent-red);
    box-shadow: 0 0 8px var(--color-accent-red);
    transition: width 0.15s ease-out, background-color 0.3s;
}

.hud-energy-low .hud-energy-val {
    animation: energyFlash 0.5s infinite alternate;
}

@keyframes energyFlash {
    0% { color: var(--color-accent-red); opacity: 1; }
    100% { color: #ffffff; opacity: 0.3; }
}

/* Low Energy Fullscreen Alert Overlay */
.low-energy-overlay {
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: 8;
    box-shadow: inset 0 0 60px rgba(255, 42, 27, 0);
    opacity: 0;
    transition: opacity 0.4s ease;
}

.low-energy-overlay.active {
    opacity: 1;
    box-shadow: inset 0 0 90px rgba(255, 42, 27, 0.45);
    animation: warningPulse 1.2s infinite alternate;
}

@keyframes warningPulse {
    0% { box-shadow: inset 0 0 40px rgba(255, 42, 27, 0.2); }
    100% { box-shadow: inset 0 0 100px rgba(255, 42, 27, 0.55); }
}

/* ==========================================================================
   Main Title 3D Layered Parallax, Glitch & Text Deconstruction
/* Main Title 3D Layered Parallax, Glitch & Text Deconstruction
   ========================================================================== */
/* Layer styles defined in Hero typography section */

/* Chromatic Aberration & Cyber Scanline Glitch */
.hero-typography-box.glitch-active .main-title {
    animation: textGlitchJitter 0.12s infinite;
    text-shadow: -4px 0 rgba(255, 42, 27, 0.85), 4px 0 rgba(0, 240, 255, 0.8), 0 0 15px var(--color-accent-red-glow);
}

@keyframes textGlitchJitter {
    0% { transform: translate(1.5px, -1.5px); }
    33% { transform: translate(-2px, 2px); }
    66% { transform: translate(2px, 1px); }
    100% { transform: translate(0, 0); }
}

/* Fullscreen Text Fragment Canvas for Gravity & Sedimentation */
.title-fragment-canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    pointer-events: none;
    z-index: 55;
    display: none;
    touch-action: none;
}

.title-fragment-canvas.active {
    display: block;
    pointer-events: none;
}

/* Floating Energy Delta Click Floater */
.energy-floater {
    position: fixed;
    font-family: var(--font-mono);
    font-weight: 800;
    font-size: 1.25rem;
    color: var(--color-accent-red);
    text-shadow: 0 0 14px var(--color-accent-red-glow);
    pointer-events: none;
    z-index: 999;
    animation: energyFloatUp 0.75s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

.energy-floater-crit {
    font-size: 1.45rem;
    color: #FFE600;
    text-shadow: 0 0 16px #FFE600, 0 0 28px #FF2A1B;
    letter-spacing: 0.08em;
}

@keyframes energyFloatUp {
    0% { opacity: 1; transform: translate(-50%, -50%) scale(0.9); }
    50% { transform: translate(-50%, -110%) scale(1.15); }
    100% { opacity: 0; transform: translate(-50%, -180%) scale(1.0); }
}

/* Magnetic Reassembly Button */
.reassemble-btn {
    position: fixed;
    bottom: 55px;
    left: 50%;
    transform: translateX(-50%) translateY(30px);
    opacity: 0;
    pointer-events: none;
    transition: all 0.35s cubic-bezier(0.16, 1, 0.3, 1);
    z-index: 250;
    background: #000000;
    color: #ffffff;
    border: 2px solid var(--color-accent-red);
    box-shadow: 0 0 25px var(--color-accent-red-glow);
    padding: 14px 28px;
    font-family: var(--font-mono);
    font-size: 0.95rem;
    font-weight: 800;
    letter-spacing: 0.15em;
    cursor: pointer;
    clip-path: polygon(8px 0, 100% 0, 100% calc(100% - 8px), calc(100% - 8px) 100%, 0 100%, 0 8px);
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.reassemble-btn:hover {
    background: var(--color-accent-red);
    color: #ffffff;
    box-shadow: 0 0 35px var(--color-accent-red);
    transform: translateX(-50%) translateY(-3px) scale(1.02);
}

.reassemble-btn:active {
    transform: translateX(-50%) translateY(0) scale(0.98);
}

.reassemble-btn.active {
    opacity: 1;
    pointer-events: auto;
    transform: translateX(-50%) translateY(0);
}

.hud-mini-btn:hover {
    color: var(--color-accent-red);
    border-color: var(--color-accent-red);
    background: var(--color-accent-red-soft);
    transform: translateY(-2px);
    box-shadow: 0 4px 15px var(--color-accent-red-glow);
}

.hud-mini-btn .btn-dot {
    width: 6px;
    height: 6px;
    background: var(--color-accent-red);
    border-radius: 50%;
}

.hud-mini-btn.btn-rewind {
    border-color: var(--color-accent-red);
    color: var(--color-accent-red);
    animation: rewindPulse 1.8s infinite;
}

@keyframes rewindPulse {
    0%, 100% { box-shadow: 0 0 5px var(--color-accent-red-glow); }
    50% { box-shadow: 0 0 18px var(--color-accent-red); }
}

.hint-highlight {
    border-color: var(--color-accent-red) !important;
    color: var(--color-accent-red) !important;
}

/* ==========================================================================
   Inspect Mode Cyber HUD Floating Panel
   ========================================================================== */
.inspect-panel {
    position: fixed;
    top: 58px;
    right: 40px;
    width: 370px;
    max-width: calc(100vw - 40px);
    background: var(--drawer-bg);
    backdrop-filter: blur(28px);
    -webkit-backdrop-filter: blur(28px);
    border: 2px solid var(--text-primary);
    border-radius: 2px;
    clip-path: polygon(14px 0, 100% 0, 100% calc(100% - 14px), calc(100% - 14px) 100%, 0 100%, 0 14px);
    box-shadow: 0 16px 50px rgba(0, 0, 0, 0.25), 0 0 0 1px var(--color-accent-red);
    z-index: 120;
    opacity: 0;
    pointer-events: none;
    transform: translateY(-14px) scale(0.97);
    transition: opacity 0.3s cubic-bezier(0.16, 1, 0.3, 1),
                transform 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.inspect-panel.active {
    opacity: 1;
    pointer-events: auto;
    transform: translateY(0) scale(1);
}

.inspect-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 18px;
    border-bottom: 1px solid var(--color-glass-border);
    background: var(--color-accent-red-soft);
}

.inspect-title-wrap {
    display: flex;
    align-items: center;
    gap: 8px;
}

.inspect-dot {
    width: 8px;
    height: 8px;
    background: var(--color-accent-red);
    border-radius: 50%;
    box-shadow: 0 0 8px var(--color-accent-red);
    animation: blinkDot 1.4s infinite;
}

.inspect-title {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    font-weight: 700;
    letter-spacing: 0.12em;
    color: var(--text-primary);
}

.inspect-close-btn {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    font-size: 1rem;
    cursor: pointer;
    padding: 2px 6px;
    transition: color 0.2s;
}

.inspect-close-btn:hover {
    color: var(--color-accent-red);
}

.inspect-content {
    padding: 18px;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.inspect-section {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.inspect-label {
    font-family: var(--font-mono);
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 0.15em;
    color: var(--text-secondary);
}

.inspect-btn-group {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 6px;
}

.inspect-opt-btn {
    padding: 8px 10px;
    background: transparent;
    border: 1px solid var(--color-glass-border);
    color: var(--text-primary);
    font-family: var(--font-mono);
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.1em;
    cursor: pointer;
    transition: all 0.2s;
    clip-path: polygon(4px 0, 100% 0, 100% calc(100% - 4px), calc(100% - 4px) 100%, 0 100%, 0 4px);
}

.inspect-opt-btn:hover {
    border-color: var(--color-accent-red);
    color: var(--color-accent-red);
}

.inspect-opt-btn.active {
    background: var(--color-accent-red);
    border-color: var(--color-accent-red);
    color: #ffffff;
    box-shadow: 0 2px 10px var(--color-accent-red-glow);
}

.slider-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-family: var(--font-mono);
    font-size: 0.72rem;
    letter-spacing: 0.1em;
    color: var(--text-secondary);
}

.slider-val {
    color: var(--color-accent-red);
    font-weight: 700;
}

.cyber-slider {
    -webkit-appearance: none;
    appearance: none;
    width: 100%;
    height: 6px;
    background: var(--color-glass-border);
    border-radius: 3px;
    outline: none;
    cursor: pointer;
}

.cyber-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 14px;
    height: 14px;
    border-radius: 2px;
    background: var(--color-accent-red);
    cursor: pointer;
    box-shadow: 0 0 8px var(--color-accent-red);
    transition: transform 0.15s;
}

.cyber-slider::-webkit-slider-thumb:hover {
    transform: scale(1.25);
}

.inspect-actions {
    display: flex;
    gap: 8px;
    margin-top: 4px;
}

.inspect-act-btn {
    flex: 1;
    padding: 10px 8px;
    background: var(--text-primary);
    color: var(--bg-base);
    border: none;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.12em;
    cursor: pointer;
    clip-path: polygon(6px 0, 100% 0, 100% calc(100% - 6px), calc(100% - 6px) 100%, 0 100%, 0 6px);
    transition: all 0.2s;
}

.inspect-act-btn:hover {
    background: var(--color-accent-red);
    color: #ffffff;
    box-shadow: 0 4px 15px var(--color-accent-red-glow);
}

.inspect-act-red {
    background: var(--color-accent-red);
    color: #ffffff;
}

.inspect-act-red:hover {
    background: #e01f11;
}

.inspect-diagnostics {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 8px;
    padding: 10px;
    background: var(--card-bg);
    border: 1px solid var(--color-glass-border);
    border-radius: 2px;
    font-family: var(--font-mono);
    font-size: 0.7rem;
    letter-spacing: 0.1em;
}

.diag-item {
    display: flex;
    justify-content: space-between;
}

.diag-tag {
    color: var(--text-secondary);
}

.diag-val {
    font-weight: 700;
    color: var(--text-primary);
}

@media (max-width: 900px) {
    .inspect-panel {
        right: 20px;
        top: 74px;
        width: calc(100vw - 40px);
    }
}

/* ==========================================================================
   Mobile & Responsive UI Optimization (Eliminates GUANNY Overflow & Collisions)
   ========================================================================== */
@media (max-width: 768px) {
    /* Prevent any accidental horizontal scrollbar */
    html, body {
        overflow-x: hidden !important;
        width: 100% !important;
    }

    /* 1. Header Navigation Bar */
    .site-header {
        height: 44px;
        padding: 0 14px;
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: 8px;
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        z-index: 90;
    }

    .brand-wrapper {
        flex-shrink: 0;
        display: flex;
        align-items: center;
        gap: 6px;
    }

    .brand-crest {
        width: 26px;
        height: 26px;
        font-size: 0.88rem;
    }

    .brand-title {
        font-size: 0.94rem;
        letter-spacing: 0.08em;
    }

    .header-actions {
        flex-shrink: 0;
        display: flex;
        align-items: center;
        gap: 8px;
    }

    /* Hide settings gear icon in header on mobile to prevent clutter; available in bottom chips and drawer */
    .header-actions #btn-inspect {
        display: none !important;
    }

    .icon-btn {
        width: 30px;
        height: 30px;
    }

    .icon-btn svg {
        width: 15px;
        height: 15px;
    }

    .menu-btn {
        height: 30px;
        padding: 0 12px;
        font-size: 0.74rem;
        letter-spacing: 0.08em;
        gap: 6px;
    }

    .hamburger-icon {
        width: 12px;
    }

    /* 方案 A：次頂欄 Cyber 能量光軌 (Sub-header Cyber Telemetry Strip) */
    .header-hud {
        display: flex !important;
        position: absolute !important;
        top: 100% !important;
        left: 0 !important;
        right: 0 !important;
        width: 100% !important;
        height: 26px !important;
        transform: none !important;
        background: rgba(10, 10, 14, 0.92) !important;
        backdrop-filter: blur(12px) !important;
        -webkit-backdrop-filter: blur(12px) !important;
        border-bottom: 1px solid rgba(255, 42, 27, 0.35) !important;
        border-top: 1px solid rgba(255, 255, 255, 0.05) !important;
        padding: 0 14px !important;
        box-sizing: border-box !important;
        z-index: 89 !important;
        pointer-events: auto !important;
        box-shadow: 0 3px 12px rgba(0, 0, 0, 0.45) !important;
    }

    body:not(.theme-obsidian) .header-hud {
        background: rgba(246, 246, 250, 0.95) !important;
        border-bottom: 1px solid rgba(255, 42, 27, 0.22) !important;
        border-top: 1px solid rgba(0, 0, 0, 0.05) !important;
        box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06) !important;
    }

    .header-hud .hud-item:not(.hud-energy-item) {
        display: none !important;
    }

    .hud-energy-item {
        display: flex !important;
        align-items: center;
        justify-content: space-between;
        width: 100% !important;
        height: 100% !important;
        gap: 10px !important;
        padding: 0 !important;
        background: transparent !important;
        border: none !important;
        cursor: pointer;
        user-select: none;
    }

    .hud-energy-item .hud-tag {
        font-family: var(--font-mono);
        font-size: 0.70rem;
        font-weight: 700;
        letter-spacing: 0.08em;
        color: var(--color-accent-red);
        white-space: nowrap;
        flex-shrink: 0;
    }

    .hud-energy-track {
        flex: 1 1 auto !important;
        height: 5px !important;
        background: rgba(255, 255, 255, 0.12) !important;
        border: 1px solid rgba(255, 42, 27, 0.35) !important;
        border-radius: 2.5px !important;
        overflow: hidden !important;
        position: relative !important;
        margin: 0 4px;
    }

    body:not(.theme-obsidian) .hud-energy-track {
        background: rgba(0, 0, 0, 0.08) !important;
        border-color: rgba(255, 42, 27, 0.3) !important;
    }

    .hud-energy-fill {
        height: 100%;
        background: linear-gradient(90deg, #FF6A3D, #FF2A1B);
        box-shadow: 0 0 10px rgba(255, 42, 27, 0.8);
        border-radius: 2px;
        transition: width 0.18s cubic-bezier(0.16, 1, 0.3, 1), background 0.3s;
    }

    .hud-energy-val {
        font-family: var(--font-mono);
        font-size: 0.72rem;
        font-weight: 700;
        min-width: 44px !important;
        text-align: right;
        color: #9A9AA4;
        white-space: nowrap;
        flex-shrink: 0;
        letter-spacing: 0.06em;
    }

    body:not(.theme-obsidian) .hud-energy-val {
        color: #71717A;
    }

    .hud-energy-hint {
        display: none !important;
    }

    /* 2. Side Telemetry & Corner Brackets */
    /* Rotated side telemetry completely hidden to prevent overlap on mobile */
    .hud-data-label {
        display: none !important;
    }

    .hud-frame-corner {
        width: 20px;
        height: 20px;
        border-width: 1.5px;
    }

    .hud-tl { top: 76px; left: 12px; }
    .hud-tr { top: 76px; right: 12px; }
    .hud-bl { bottom: 16px; left: 12px; }
    .hud-br { bottom: 16px; right: 12px; }

    /* 3. Hero Cover & Single-Line GUANNY Title */
    .hero-cover {
        padding: 0 12px;
        height: 100vh;
        min-height: 100vh;
        overflow: hidden;
    }

    .hero-typography-box {
        padding: 0 8px;
        margin-top: 0;
        max-width: 100vw;
    }

    .main-title {
        font-size: clamp(2.3rem, 12.5vw, 4.4rem);
        letter-spacing: 0.02em;
        max-width: 96vw;
        line-height: 0.95;
    }

    .title-layer-g .char-accent::after {
        height: 4px;
        bottom: 2%;
    }

    .hero-meta-row {
        font-size: 0.65rem;
        letter-spacing: 0.12em;
        gap: 8px;
        margin-top: 12px;
    }

    .hero-meta-row::before,
    .hero-meta-row::after {
        width: 16px;
    }

    /* 4. Action CTA & Interaction Chips */
    .hero-cta {
        margin-top: 22px;
        gap: 8px;
    }

    .enter-btn {
        padding: 8px 26px;
    }

    .enter-btn-inner {
        font-size: 0.95rem;
        letter-spacing: 0.15em;
        gap: 8px;
    }

    .enter-hint {
        font-size: 0.6rem;
        letter-spacing: 0.1em;
        opacity: 0.7;
    }

    .interaction-hints {
        gap: 6px;
        margin-top: 4px;
        max-width: 96vw;
        flex-wrap: wrap;
        justify-content: center;
    }

    .hint-chip {
        padding: 4px 10px;
        font-size: 0.64rem;
        letter-spacing: 0.06em;
    }

    /* 5. Shard Reassembly Button */
    .reassemble-btn {
        bottom: 70px;
        padding: 8px 18px;
        font-size: 0.72rem;
    }

    /* 6. Mobile Drawer */
    .menu-drawer {
        max-width: 100vw;
        width: 100%;
        padding: 24px 20px;
    }

    .drawer-nav-item {
        margin-bottom: 8px;
    }

    .nav-title-en {
        font-size: 1.15rem;
    }

    .nav-title-zh {
        font-size: 0.82rem;
    }
}

@media (max-width: 420px) {
    .site-header {
        padding: 0 8px;
        gap: 4px;
    }

    .main-title {
        font-size: clamp(2.0rem, 13vw, 3.2rem);
    }

    .brand-crest {
        width: 24px;
        height: 24px;
        font-size: 0.8rem;
    }

    .brand-title {
        font-size: 0.84rem;
        letter-spacing: 0.03em;
    }

    .header-actions {
        gap: 4px;
    }

    .icon-btn {
        width: 26px;
        height: 26px;
    }

    .icon-btn svg {
        width: 13px;
        height: 13px;
    }

    .menu-btn {
        height: 26px;
        padding: 0 8px;
        font-size: 0.68rem;
        gap: 4px;
    }

    .hud-energy-item {
        gap: 8px !important;
        padding: 0 !important;
    }

    .hud-energy-track {
        flex: 1 1 auto !important;
        width: auto !important;
    }

    .hud-energy-val {
        min-width: 40px !important;
        font-size: 0.70rem;
    }

    .hero-meta-row {
        font-size: 0.58rem;
        gap: 6px;
        letter-spacing: 0.08em;
    }

    .interaction-hints {
        gap: 4px;
    }

    .hint-chip {
        padding: 4px 8px;
        font-size: 0.6rem;
    }
}

@media (max-width: 360px) {
    .brand-title {
        display: none; /* Ultra-compact screens: show iconic [G] crest only */
    }

    .header-hud .hud-tag {
        font-size: 0.62rem;
    }
}