/* ==========================================================================
   1. CSS RESET & GLOBAL DEFAULTS
   ========================================================================== */

*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    text-rendering: optimizeLegibility;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    font-size: 16px;
}

body {
    background-color: var(--color-bg);
    color: var(--color-text);
    font-family: var(--font-primary);
    overflow-x: hidden;
    min-height: 100vh;
    transition: background-color 0.8s cubic-bezier(0.16, 1, 0.3, 1),
                color 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

img,
svg,
video {
    display: block;
    max-width: 100%;
    height: auto;
}

button {
    background: none;
    border: none;
    font: inherit;
    cursor: pointer;
    outline: none;
}

a {
    color: inherit;
    text-decoration: none;
}

::selection {
    background-color: var(--color-primary-container);
    color: var(--color-on-primary-container);
}

/* ==========================================================================
   2. THEME CONFIGURATIONS & MATERIAL DESIGN 3 VARIABLES
   ========================================================================== */

:root {
    /* Google Fonts Master Style Matrix */
    --font-primary: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    --font-heading-bold: 'Syne', sans-serif;
    --font-heading-serif: 'Playfair Display', serif;
    --font-mono-tech: 'Space Grotesk', sans-serif;
    --font-display-classic: 'Cinzel', serif;
    
    /* Premium High-End Font Variables */
    --font-super-black: 'Elms Sans', sans-serif;
    --font-pixel-tech: 'Bitcount Single', monospace;

    /* Transition Motion Slopes */
    --transition-fast: 200ms cubic-bezier(0.2, 0, 0, 1);
    --transition-medium: 400ms cubic-bezier(0.2, 0, 0, 1);
    --transition-slow: 800ms cubic-bezier(0.16, 1, 0.3, 1);
    --transition-cosmic: 1400ms cubic-bezier(0.16, 1, 0.3, 1);

    /* MD3 Shadow Profiles */
    --shadow-elevation-1: 0px 1px 3px 1px rgba(0, 0, 0, 0.15), 0px 1px 2px 0px rgba(0, 0, 0, 0.30);
    --shadow-elevation-2: 0px 2px 6px 2px rgba(0, 0, 0, 0.15), 0px 1px 2px 0px rgba(0, 0, 0, 0.30);
    --shadow-elevation-3: 0px 1px 3px 0px rgba(0, 0, 0, 0.3), 0px 4px 8px 3px rgba(0, 0, 0, 0.15);
    --shadow-elevation-4: 0px 2px 3px 0px rgba(0, 0, 0, 0.3), 0px 6px 10px 4px rgba(0, 0, 0, 0.15);

    /* Clean Refined Geometric Radii */
    --radius-small: 8px;
    --radius-medium: 12px;
    --radius-large: 24px;
    --radius-xlarge: 32px;
    --radius-full: 50%;

    /* Layout Spacing Constants with Generous Whitespace Gutters */
    --section-padding: 120px 0;
    --container-width: 1140px;
    --desktop-whitespace: 80px; /* Elegant desktop screen gutter width */

    /* Theme Colors (Dark Baseline) */
    --color-bg: #0b0914;
    --color-surface: #110e1f;
    --color-surface-variant: #1b1730;
    --color-primary: #d0bcff;
    --color-on-primary: #381e72;
    --color-primary-container: #4f378b;
    --color-on-primary-container: #eaddff;
    --color-secondary: #ccc2dc;
    --color-on-secondary: #332d41;
    --color-secondary-container: #4a4458;
    --color-on-secondary-container: #e8def8;
    --color-tertiary: #efb8c8;
    --color-on-tertiary: #492532;
    --color-tertiary-container: #633b48;
    --color-on-tertiary-container: #ffd8e4;
    --color-error: #f2b8b5;
    --color-on-error: #601410;
    --color-text: #f5f0fa;
    --color-text-muted: #9b93a8;
    --color-outline: #827b8c;
    --color-outline-variant: #353047;

    /* Ambient Air Glows */
    --glow-purple: rgba(192, 132, 252, 0.25);
    --glow-orange: rgba(251, 146, 60, 0.18);
    --gradient-hero: linear-gradient(135deg, #d0bcff 0%, #efb8c8 50%, #fdbb2d 100%);
}

body.light-theme {
    /* Theme Colors (Light Override) */
    --color-bg: #FAF8FD;
    --color-surface: #F2ECF7;
    --color-surface-variant: #E6DCF0;
    --color-primary: #65558F;
    --color-on-primary: #FFFFFF;
    --color-primary-container: #EADDFF;
    --color-on-primary-container: #21005D;
    --color-secondary: #625B71;
    --color-on-secondary: #FFFFFF;
    --color-secondary-container: #E8DEF8;
    --color-on-secondary-container: #1D192B;
    --color-tertiary: #7D5260;
    --color-on-tertiary: #FFFFFF;
    --color-tertiary-container: #FFD8E4;
    --color-on-tertiary-container: #31111D;
    --color-error: #B3261E;
    --color-on-error: #FFFFFF;
    --color-text: #1C1A22;
    --color-text-muted: #5C5668;
    --color-outline: #79747E;
    --color-outline-variant: #D1C6DB;

    /* Ambient Air Glows (Light Mode) */
    --glow-purple: rgba(101, 85, 143, 0.12);
    --glow-orange: rgba(253, 187, 45, 0.12);
    --gradient-hero: linear-gradient(135deg, #65558F 0%, #7D5260 50%, #EB7828 100%);
}

/* ==========================================================================
   3. MULTI-LANGUAGE DEEP TYPOGRAPHY SYSTEM (GOOGLE FONTS RICH MIX)
   ========================================================================== */

/* English Language Layout Context */
.lang-en {
    --font-primary: 'Plus Jakarta Sans', sans-serif;
}
.lang-en .hero-title { font-family: var(--font-heading-bold); }
.lang-en .hero-intro { font-family: var(--font-heading-serif); }
.lang-en .section-title { font-family: var(--font-heading-bold); }
.lang-en .logo { font-family: var(--font-display-classic); }

/* Simplified Chinese Context */
.lang-zh-hans {
    --font-primary: 'Plus Jakarta Sans', "PingFang SC", "Lantinghei SC", "Microsoft YaHei", sans-serif;
}
.lang-zh-hans .hero-title { font-family: var(--font-heading-bold), "PingFang SC", sans-serif; }
.lang-zh-hans .hero-intro { font-family: var(--font-heading-serif), "STKaiti", "KaiTi", serif; }
.lang-zh-hans .section-title { font-family: var(--font-heading-bold), "PingFang SC", sans-serif; }
.lang-zh-hans .logo { font-family: var(--font-display-classic), "PingFang SC", sans-serif; }

/* Traditional Chinese Context */
.lang-zh-hant {
    --font-primary: 'Plus Jakarta Sans', "PingFang TC", "Lantinghei TC", "Microsoft JhengHei", sans-serif;
}
.lang-zh-hant .hero-title { font-family: var(--font-heading-bold), "PingFang TC", sans-serif; }
.lang-zh-hant .hero-intro { font-family: var(--font-heading-serif), "BiauKai", "DFKai-SB", serif; }
.lang-zh-hant .section-title { font-family: var(--font-heading-bold), "PingFang TC", sans-serif; }
.lang-zh-hant .logo { font-family: var(--font-display-classic), "PingFang TC", sans-serif; }

/* Japanese Language Context */
.lang-jp {
    --font-primary: 'Plus Jakarta Sans', "Hiragino Kaku Gothic ProN", "Hiragino Sans", "Meiryo", sans-serif;
}
.lang-jp .hero-title { font-family: var(--font-heading-bold), "Hiragino Sans", sans-serif; }
.lang-jp .hero-intro { font-family: var(--font-heading-serif), "Hiragino Mincho ProN", serif; }
.lang-jp .section-title { font-family: var(--font-heading-bold), "Hiragino Sans", sans-serif; }
.lang-jp .logo { font-family: var(--font-display-classic), "Hiragino Sans", sans-serif; }

/* Korean Language Context */
.lang-ko {
    --font-primary: 'Plus Jakarta Sans', "Apple SD Gothic Neo", "Malgun Gothic", sans-serif;
}
.lang-ko .hero-title { font-family: var(--font-heading-bold), "Apple SD Gothic Neo", sans-serif; }
.lang-ko .hero-intro { font-family: var(--font-heading-serif), "Batang", "Gungsuh", serif; }
.lang-ko .section-title { font-family: var(--font-heading-bold), "Apple SD Gothic Neo", sans-serif; }
.lang-ko .logo { font-family: var(--font-display-classic), "Apple SD Gothic Neo", sans-serif; }

/* Russian Language Context */
.lang-ru {
    --font-primary: 'Plus Jakarta Sans', sans-serif;
}
.lang-ru .hero-title { font-family: var(--font-heading-bold); }
.lang-ru .hero-intro { font-family: var(--font-heading-serif); }
.lang-ru .section-title { font-family: var(--font-heading-bold); }
.lang-ru .logo { font-family: var(--font-display-classic); }

/* Spanish Language Context */
.lang-es {
    --font-primary: 'Plus Jakarta Sans', sans-serif;
}
.lang-es .hero-title { font-family: var(--font-heading-bold); }
.lang-es .hero-intro { font-family: var(--font-heading-serif); }
.lang-es .section-title { font-family: var(--font-heading-bold); }
.lang-es .logo { font-family: var(--font-display-classic); }

/* Unified Alphanumeric Component Font Assignments */
.lang-trigger,
.support-btn,
.cta-btn,
.outlink-btn,
.fallback-link,
.platform-sub,
.payment-label,
.cookie-accept-btn,
.copyright,
.comp-link-btn {
    font-family: var(--font-mono-tech) !important;
}

/* Unique Dotted Pixel-vibe Font Allocations */
.placeholder-title,
.video-info-text h3,
.action-badge,
#currentYear {
    font-family: var(--font-pixel-tech) !important;
    letter-spacing: 0.05em;
}

/* Elegant Super-Black Elms Sans Header Credit styling */
.thanks-credit {
    font-family: var(--font-super-black) !important;
    font-weight: 900 !important;
    font-size: 0.75rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--color-text-muted);
    margin-bottom: 24px;
}

/* ==========================================================================
   4. LAYOUT SYSTEM & CONTAINERS
   ========================================================================== */

.container {
    width: 100%;
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 var(--desktop-whitespace); /* Generous padding to prevent layout edge-touching */
}

/* ==========================================================================
   5. BACKGROUND AMBIENCE, COSMIC STREAMERS & GEOMETRIC PARTICLES
   ========================================================================== */

.bg-decorations {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    z-index: -1;
    overflow: hidden;
    pointer-events: none;
}

/* Spectral Glow Background Container */
.spectral-glow-container {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
    z-index: -2;
    opacity: 0.35;
    mix-blend-mode: screen;
    will-change: transform;
}

body.light-theme .spectral-glow-container {
    opacity: 0.52; /* Greatly increased opacity for beautiful light mode rendering */
    mix-blend-mode: normal; /* Disables multiply to prevent pastels from washing out */
}

.spectral-blob {
    position: absolute;
    border-radius: 50%;
    filter: blur(140px);
    will-change: transform;
    transition: background var(--transition-slow);
}

.spectral-blob-1 {
    width: 60vw;
    height: 60vw;
    background: radial-gradient(circle, rgba(208, 188, 255, 0.7) 0%, rgba(139, 233, 253, 0) 70%);
    top: -20%;
    left: -10%;
    animation: spectralFlow1 25s infinite alternate ease-in-out;
}

.spectral-blob-2 {
    width: 55vw;
    height: 55vw;
    background: radial-gradient(circle, rgba(239, 184, 200, 0.75) 0%, rgba(253, 187, 45, 0) 70%);
    bottom: -15%;
    right: -10%;
    animation: spectralFlow2 30s infinite alternate ease-in-out;
}

.spectral-blob-3 {
    width: 50vw;
    height: 50vw;
    background: radial-gradient(circle, rgba(253, 187, 45, 0.6) 0%, rgba(154, 255, 144, 0) 70%);
    top: 25%;
    right: -5%;
    animation: spectralFlow3 28s infinite alternate ease-in-out;
}

.spectral-blob-4 {
    width: 50vw;
    height: 50vw;
    background: radial-gradient(circle, rgba(139, 233, 253, 0.75) 0%, rgba(104, 151, 246, 0) 70%);
    bottom: 10%;
    left: -5%;
    animation: spectralFlow4 32s infinite alternate ease-in-out;
}

.deco-stripes {
    position: absolute;
    top: 0;
    left: 10%;
    width: 1px;
    height: 100%;
    background: linear-gradient(to bottom, 
        transparent 0%, 
        var(--color-outline-variant) 25%, 
        var(--color-outline-variant) 75%, 
        transparent 100%
    );
    opacity: 0.15;
}

.deco-dots {
    position: absolute;
    background-image: radial-gradient(var(--color-outline) 1.5px, transparent 1.5px);
    background-size: 24px 24px;
    opacity: 0.45;
    will-change: transform, background-position, opacity, width, height, border-radius;
}

body.light-theme .deco-dots {
    opacity: 0.55;
}

/* premium dynamic morphing and breathing dot matrix transitions */
.deco-dots-tr {
    top: 15%;
    right: 8%;
    animation: dotMatrixFlow1 12s infinite ease-in-out; /* Flowing and breathing morphing shape */
}

.deco-dots-bl {
    top: 70%;
    left: 8%;
    animation: dotMatrixFlow2 14s infinite ease-in-out;
}

/* Dynamic astronomical meteor showers */
.meteor {
    position: absolute;
    width: 1.5px;
    height: 100px;
    background: linear-gradient(to bottom, var(--color-primary), transparent);
    opacity: 0;
    transform: rotate(45deg);
    will-change: transform, opacity;
}

.meteor-1 {
    top: -10%;
    left: 20%;
    animation: shootMeteor 12s infinite linear;
}

.meteor-2 {
    top: -10%;
    left: 45%;
    animation: shootMeteor 16s infinite linear;
    animation-delay: 3s;
}

.meteor-3 {
    top: -10%;
    left: 70%;
    animation: shootMeteor 14s infinite linear;
    animation-delay: 6s;
}

.meteor-4 {
    top: -10%;
    left: 90%;
    animation: shootMeteor 20s infinite linear;
    animation-delay: 9s;
}

.geo-shape {
    position: absolute;
    opacity: 0.28;
    transition: opacity var(--transition-medium);
    will-change: transform;
}

body.light-theme .geo-shape {
    opacity: 0.38;
}

.geo-shape svg {
    width: 100%;
    height: 100%;
    stroke: var(--color-outline);
    stroke-width: 1.5px;
    fill: none;
    transition: stroke var(--transition-medium);
}

/* Scattered Positions & Specific Animation Bindings */
.geo-circle-1 {
    top: 15%;
    left: 8%;
    width: 80px;
    height: 80px;
    animation: floatRotateA 25s infinite ease-in-out;
}

.geo-circle-2 {
    top: 50%;
    right: 10%;
    width: 110px;
    height: 110px;
    animation: floatRotateB 35s infinite ease-in-out;
}

.geo-circle-3 {
    top: 80%;
    left: 28%;
    width: 60px;
    height: 60px;
    animation: floatRotateC 28s infinite ease-in-out;
}

.geo-triangle-1 {
    top: 10%;
    right: 12%;
    width: 70px;
    height: 70px;
    animation: floatRotateB 30s infinite ease-in-out;
}

.geo-triangle-2 {
    top: 60%;
    left: 6%;
    width: 90px;
    height: 90px;
    animation: floatRotateC 22s infinite ease-in-out;
}

.geo-triangle-3 {
    top: 85%;
    right: 15%;
    width: 80px;
    height: 80px;
    animation: floatRotateA 32s infinite ease-in-out;
}

.geo-square-1 {
    top: 32%;
    left: 22%;
    width: 85px;
    height: 85px;
    animation: floatRotateC 26s infinite ease-in-out;
}

.geo-square-2 {
    top: 70%;
    right: 35%;
    width: 75px;
    height: 75px;
    animation: floatRotateA 38s infinite ease-in-out;
}

.geo-square-3 {
    top: 92%;
    left: 12%;
    width: 100px;
    height: 100px;
    animation: floatRotateB 24s infinite ease-in-out;
}

.cosmic-horizon {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background: linear-gradient(90deg, 
        transparent 0%, 
        var(--color-outline-variant) 50%, 
        transparent 100%
    );
    opacity: 0.2;
}

/* ==========================================================================
   6. INTUITION DYNAMIC CURSOR (MORPHING ENGINE)
   ========================================================================== */

.custom-cursor {
    position: fixed;
    top: 0;
    left: 0;
    width: 20px;
    height: 20px;
    border-radius: var(--radius-full);
    background-color: rgba(208, 188, 255, 0.25);
    border: 2px solid var(--color-primary);
    box-shadow: 0 0 12px var(--glow-purple);
    pointer-events: none;
    z-index: 99999;
    opacity: 1;
    transform: translate3d(-100px, -100px, 0);
    transition: background-color var(--transition-medium),
                opacity var(--transition-slow),
                box-shadow var(--transition-medium),
                border var(--transition-medium);
    will-change: transform, width, height, border-radius;
}

/* Hide default cursor on desktop environments */
@media (pointer: fine) {
    body,
    body * {
        cursor: none !important;
    }
}

.custom-cursor.hidden {
    opacity: 0;
}

/* Locking states when hovering over buttons or links */
.custom-cursor.morph-active {
    background-color: rgba(255, 255, 255, 0.08);
    border: 1.5px solid var(--color-primary);
    box-shadow: 0 0 24px var(--glow-purple);
}

body.light-theme .custom-cursor.morph-active {
    background-color: rgba(101, 85, 143, 0.06);
    border: 1.5px solid var(--color-primary);
    box-shadow: 0 0 24px var(--glow-purple);
}

/* ==========================================================================
   7. HEADER & NAVIGATION CONTROL PANEL
   ========================================================================== */

header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 40px 0;
    z-index: 100;
    position: relative;
}

.logo {
    font-family: var(--font-heading-bold);
    font-size: 1.625rem;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: -0.04em;
    color: var(--color-text);
    transition: transform var(--transition-medium), color var(--transition-medium);
}

.logo:hover {
    transform: translateY(-1px);
}

.header-controls {
    display: flex;
    align-items: center;
    gap: 16px;
}

.support-btn {
    font-weight: 700;
    font-size: 0.875rem;
    padding: 12px 28px;
    border-radius: var(--radius-medium);
    background-color: var(--color-primary-container);
    color: var(--color-on-primary-container);
    transition: background-color var(--transition-fast), 
                transform var(--transition-fast), 
                box-shadow var(--transition-fast);
    box-shadow: var(--shadow-elevation-1);
}

.support-btn:hover {
    background-color: var(--color-primary);
    color: var(--color-on-primary);
    box-shadow: var(--shadow-elevation-2);
    transform: translateY(-2px);
}

.support-btn:active {
    transform: translateY(0);
    box-shadow: var(--shadow-elevation-1);
}

.theme-toggle {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-medium);
    background-color: var(--color-surface);
    border: 1px solid var(--color-outline-variant);
    color: var(--color-text);
    transition: background-color var(--transition-fast), 
                border-color var(--transition-fast), 
                transform var(--transition-fast);
}

.theme-toggle:hover {
    background-color: var(--color-surface-variant);
    border-color: var(--color-outline);
    transform: translateY(-2px);
}

.theme-toggle svg {
    width: 22px;
    height: 22px;
    transition: transform var(--transition-slow);
}

.sun-icon {
    display: none;
}

.moon-icon {
    display: block;
}

body.light-theme .sun-icon {
    display: block;
}

body.light-theme .moon-icon {
    display: none;
}

/* Language Selection Trigger */
.lang-dropdown-wrapper {
    position: relative;
}

.lang-trigger {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px 20px;
    border-radius: var(--radius-medium);
    background-color: var(--color-surface);
    border: 1px solid var(--color-outline-variant);
    color: var(--color-text);
    font-size: 0.875rem;
    font-weight: 600;
    transition: background-color var(--transition-fast), 
                border-color var(--transition-fast), 
                transform var(--transition-fast);
}

.lang-trigger:hover {
    background-color: var(--color-surface-variant);
    border-color: var(--color-outline);
    transform: translateY(-2px);
}

.lang-trigger.active {
    background-color: var(--color-surface-variant);
    border-color: var(--color-outline);
}

.globe-icon,
.chevron-icon {
    width: 18px;
    height: 18px;
    stroke: var(--color-text-muted);
}

.chevron-icon {
    transition: transform var(--transition-medium);
}

.lang-trigger.active .chevron-icon {
    transform: rotate(180deg);
}

/* Language Selection Popover Menu */
.lang-dropdown-menu {
    position: absolute;
    top: calc(100% + 12px);
    right: 0;
    width: 190px;
    background-color: var(--color-surface);
    border: 1px solid var(--color-outline-variant);
    border-radius: var(--radius-medium);
    box-shadow: var(--shadow-elevation-3);
    padding: 8px;
    z-index: 200;
    opacity: 0;
    visibility: hidden;
    transform: translateY(12px);
    transition: opacity var(--transition-slow), 
                visibility var(--transition-slow), 
                transform var(--transition-slow);
}

.lang-dropdown-menu.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.lang-dropdown-menu button {
    display: block;
    width: 100%;
    text-align: left;
    padding: 10px 14px;
    font-family: var(--font-primary);
    font-size: 0.875rem;
    color: var(--color-text-muted);
    border-radius: var(--radius-small);
    transition: background-color var(--transition-fast), color var(--transition-fast);
}

.lang-dropdown-menu button:hover {
    background-color: var(--color-surface-variant);
    color: var(--color-text);
}

.lang-dropdown-menu button.active {
    background-color: var(--color-primary-container);
    color: var(--color-on-primary-container);
    font-weight: 700;
}

/* ==========================================================================
   8. HERO LANDING SECTION
   ========================================================================== */

.hero-section {
    display: grid;
    grid-template-columns: 1.25fr 0.75fr;
    gap: 80px;
    align-items: center;
    padding: 80px 0 120px 0;
    position: relative;
}

.hero-content {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
}

.hero-title {
    font-size: 5rem;
    line-height: 1.05;
    font-weight: 800;
    letter-spacing: -0.05em;
    color: var(--color-text);
    margin-bottom: 28px;
}

/* Shimmering rainbow text flow timeline */
.gradient-text {
    background: var(--gradient-hero);
    background-size: 300% 300%;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    display: inline-block;
    animation: shimmerGradient 10s infinite linear;
}

.hero-intro {
    font-size: 1.75rem;
    font-style: italic;
    line-height: 1.55;
    color: var(--color-text-muted);
    margin-bottom: 48px;
}

.cta-btn {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    padding: 18px 40px;
    border-radius: var(--radius-medium);
    background-color: var(--color-primary);
    color: var(--color-on-primary);
    font-weight: 700;
    font-size: 1rem;
    box-shadow: var(--shadow-elevation-2);
    transition: background-color var(--transition-medium), 
                transform var(--transition-medium), 
                box-shadow var(--transition-medium);
}

.cta-btn:hover {
    background-color: var(--color-primary-container);
    color: var(--color-on-primary-container);
    box-shadow: var(--shadow-elevation-3);
    transform: translateY(-3px);
}

.cta-btn:active {
    transform: translateY(0);
    box-shadow: var(--shadow-elevation-1);
}

.cta-btn svg {
    width: 20px;
    height: 20px;
    transition: transform var(--transition-medium);
}

.cta-btn:hover svg {
    transform: translateX(6px);
}

/* Visual Presentation Side */
.hero-visual {
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
    width: 100%;
}

/* Spinning Badge Circular Seal */
.badge-container {
    position: absolute;
    top: -48px;
    right: -48px;
    width: 136px;
    height: 136px;
    z-index: 10;
    pointer-events: none;
}

.spinning-circle {
    width: 100%;
    height: 100%;
    animation: circularSpin 28s infinite linear;
}

.spinning-circle text {
    font-family: var(--font-mono-tech);
    font-weight: 700;
}

.badge-center {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 48px;
    height: 48px;
    border-radius: var(--radius-full);
    background-color: var(--color-surface);
    border: 1px solid var(--color-outline-variant);
    display: flex;
    align-items: center;
    justify-content: center;
}

.sparkle-svg {
    width: 20px;
    height: 20px;
    color: var(--color-primary);
    animation: simplePulse 5s infinite ease-in-out;
}

/* Double Logo Toggle Visual Circular Container */
.logo-toggle-container {
    position: relative;
    width: 340px;
    height: 340px;
    border-radius: var(--radius-full); /* Perfectly circular */
    overflow: hidden;
    background-color: var(--color-surface);
    border: 1px solid var(--color-outline-variant);
    box-shadow: var(--shadow-elevation-2);
    transition: transform var(--transition-slow), border-color var(--transition-slow), box-shadow var(--transition-slow);
}

.logo-toggle-container:hover {
    transform: translateY(-4px);
    border-color: var(--color-outline);
    box-shadow: var(--shadow-elevation-3);
}

.logo-img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: opacity var(--transition-slow);
    will-change: opacity;
}

.logo-hover {
    opacity: 0;
}

.logo-toggle-container:hover .logo-default {
    opacity: 0;
}

.logo-toggle-container:hover .logo-hover {
    opacity: 1;
}

/* ==========================================================================
   9. FEATURED WORK & VIDEO MEDIA CENTER
   ========================================================================== */

.work-section {
    padding: var(--section-padding);
}

.section-title {
    font-size: 2.75rem;
    font-weight: 800;
    letter-spacing: -0.03em;
    color: var(--color-text);
    margin-bottom: 56px;
    position: relative;
    display: inline-block;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 0;
    width: 56px;
    height: 4px;
    background-color: var(--color-primary);
    border-radius: 2px;
}

.video-card {
    background-color: var(--color-surface);
    border: 1px solid var(--color-outline-variant);
    border-radius: var(--radius-large);
    overflow: hidden;
    box-shadow: var(--shadow-elevation-2);
    transition: transform var(--transition-slow), box-shadow var(--transition-slow), border-color var(--transition-slow);
}

.video-card:hover {
    box-shadow: var(--shadow-elevation-3);
    border-color: var(--color-outline);
    transform: translateY(-3px);
}

.video-player-container {
    aspect-ratio: 16 / 9;
    width: 100%;
    background-color: #000000;
    position: relative;
}

/* Video Loading Interactive Soft Cover */
.video-placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    background-color: #110e1f;
    position: relative;
    overflow: hidden;
}

.video-placeholder::before {
    content: '';
    position: absolute;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle, transparent 20%, rgba(0,0,0,0.65) 100%);
    z-index: 1;
}

.placeholder-content {
    position: relative;
    z-index: 2;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    padding: 32px;
}

.play-btn-outer {
    width: 88px;
    height: 88px;
    border-radius: var(--radius-full);
    background-color: var(--color-primary-container);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 28px;
    transition: transform var(--transition-slow), background-color var(--transition-slow), box-shadow var(--transition-slow);
    box-shadow: 0 0 0 0 var(--glow-purple);
}

.play-btn-inner {
    width: 0;
    height: 0;
    border-top: 14px solid transparent;
    border-bottom: 14px solid transparent;
    border-left: 22px solid var(--color-on-primary-container);
    margin-left: 8px;
    transition: border-left-color var(--transition-medium);
}

.video-placeholder:hover .play-btn-outer {
    transform: scale(1.06);
    background-color: var(--color-primary);
    box-shadow: 0 0 24px var(--glow-purple);
}

.video-placeholder:hover .play-btn-inner {
    border-left-color: var(--color-on-primary);
}

.placeholder-title {
    font-size: 1.625rem;
    font-weight: 700;
    color: #ffffff;
    margin-bottom: 12px;
    letter-spacing: -0.01em;
}

.placeholder-desc {
    font-family: var(--font-primary);
    font-size: 0.9375rem;
    color: rgba(255, 255, 255, 0.7);
}

/* Video Spec Info Footer Panel */
.video-info-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 28px 40px;
    background-color: var(--color-surface);
    border-bottom: 1px solid var(--color-outline-variant);
}

.video-info-text h3 {
    font-size: 1.35rem;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: 6px;
}

.video-info-text p {
    font-family: var(--font-primary);
    font-size: 0.875rem;
    color: var(--color-text-muted);
}

.outlink-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 14px 28px;
    border-radius: var(--radius-medium);
    border: 1px solid var(--color-outline-variant);
    font-size: 0.875rem;
    font-weight: 600;
    transition: background-color var(--transition-fast), 
                border-color var(--transition-fast), 
                transform var(--transition-fast);
}

.outlink-btn:hover {
    background-color: var(--color-surface-variant);
    border-color: var(--color-outline);
    transform: translateY(-2px);
}

.outlink-btn svg {
    stroke: var(--color-text-muted);
}

/* Fallback Bilibili Notification Bar */
.video-fallback-bar {
    display: flex;
    align-items: center;
    padding: 20px 40px;
    background-color: var(--color-surface-variant);
}

.video-fallback-bar span {
    font-family: var(--font-primary);
    font-size: 0.9375rem;
    color: var(--color-text-muted);
}

.fallback-link {
    font-size: 0.9375rem;
    font-weight: 700;
    color: var(--color-primary);
    margin-left: 8px;
    transition: color var(--transition-fast);
}

.fallback-link:hover {
    color: var(--color-text);
}

/* Live Dynamic Waveform Icon */
.m3-waveform {
    display: flex;
    align-items: flex-end;
    gap: 4px;
    width: 28px;
    height: 18px;
    margin-left: auto;
}

.m3-wave-bar {
    width: 3.5px;
    background-color: var(--color-primary);
    border-radius: 2px;
    height: 100%;
    transform-origin: bottom;
}

.m3-wave-bar:nth-child(1) {
    animation: gentleSoundWave 1.3s ease-in-out infinite alternate;
}

.m3-wave-bar:nth-child(2) {
    animation: gentleSoundWave 0.9s ease-in-out infinite alternate;
    animation-delay: -0.25s;
}

.m3-wave-bar:nth-child(3) {
    animation: gentleSoundWave 1.5s ease-in-out infinite alternate;
    animation-delay: -0.55s;
}

.m3-wave-bar:nth-child(4) {
    animation: gentleSoundWave 1.1s ease-in-out infinite alternate;
    animation-delay: -0.15s;
}

/* ==========================================================================
   10. PLATFORMS SOCIAL GRID SYSTEM
   ========================================================================== */

.connect-section {
    padding: var(--section-padding);
}

.cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 24px;
}

/* Clean UI platform cards */
.platform-card {
    display: flex;
    align-items: center;
    padding: 28px;
    border-radius: var(--radius-large);
    background-color: var(--color-surface);
    border: 1px solid var(--color-outline-variant);
    transition: transform var(--transition-slow), 
                box-shadow var(--transition-slow), 
                border-color var(--transition-slow);
    position: relative;
    overflow: hidden;
}

.platform-card:hover {
    box-shadow: var(--shadow-elevation-3);
    transform: translateY(-3px);
    border-color: var(--color-outline);
}

/* Sheen/shimmer effect removed */

.platform-icon-container {
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--color-surface-variant);
    border-radius: var(--radius-medium);
    margin-right: 18px;
    transition: background-color var(--transition-medium);
}

.platform-img {
    width: 30px;
    height: 30px;
    object-fit: contain;
}

.platform-details {
    display: flex;
    flex-direction: column;
}

.platform-name {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: 4px;
}

.platform-sub {
    font-size: 0.8125rem;
    color: var(--color-text-muted);
}

.action-badge {
    position: absolute;
    top: 18px;
    right: 18px;
    font-size: 0.75rem;
    font-weight: 700;
    padding: 6px 12px;
    border-radius: 8px;
    background-color: var(--color-surface-variant);
    color: var(--color-text-muted);
    transition: background-color var(--transition-fast), color var(--transition-fast);
}

/* Platform-specific dynamic hover treatments */
.card-youtube:hover {
    background: linear-gradient(135deg, var(--color-surface) 60%, rgba(255, 0, 0, 0.05) 100%);
    border-color: rgba(255, 0, 0, 0.35);
}

.card-youtube:hover .platform-icon-container {
    background-color: rgba(255, 0, 0, 0.12);
}

.card-youtube:hover .action-badge {
    background-color: rgba(255, 0, 0, 0.16);
    color: #ff3333;
}

.card-bilibili:hover {
    background: linear-gradient(135deg, var(--color-surface) 60%, rgba(251, 114, 153, 0.05) 100%);
    border-color: rgba(251, 114, 153, 0.35);
}

.card-bilibili:hover .platform-icon-container {
    background-color: rgba(251, 114, 153, 0.12);
}

.card-bilibili:hover .action-badge {
    background-color: rgba(251, 114, 153, 0.16);
    color: #fb7299;
}

.card-twitter:hover {
    background: linear-gradient(135deg, var(--color-surface) 60%, rgba(255, 255, 255, 0.03) 100%);
    border-color: rgba(255, 255, 255, 0.25);
}

body.light-theme .card-twitter:hover {
    background: linear-gradient(135deg, var(--color-surface) 60%, rgba(0, 0, 0, 0.02) 100%);
    border-color: rgba(0, 0, 0, 0.2);
}

.card-twitter:hover .platform-icon-container {
    background-color: rgba(255, 255, 255, 0.08);
}

body.light-theme .card-twitter:hover .platform-icon-container {
    background-color: rgba(0, 0, 0, 0.06);
}

.card-twitter:hover .action-badge {
    background-color: rgba(255, 255, 255, 0.1);
    color: var(--color-text);
}

body.light-theme .card-twitter:hover .action-badge {
    background-color: rgba(0, 0, 0, 0.05);
    color: var(--color-text);
}

.card-rednote:hover {
    background: linear-gradient(135deg, var(--color-surface) 60%, rgba(255, 36, 66, 0.05) 100%);
    border-color: rgba(255, 36, 66, 0.35);
}

.card-rednote:hover .platform-icon-container {
    background-color: rgba(255, 36, 66, 0.12);
}

.card-rednote:hover .action-badge {
    background-color: rgba(255, 36, 66, 0.16);
    color: #ff2442;
}

/* ==========================================================================
   11. MODAL OVERLAY PORTALS (SUPPORT & COMPLIANCE)
   ========================================================================= */

.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    z-index: 1000;
    background-color: rgba(8, 6, 15, 0.85);
    backdrop-filter: blur(16px);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition-slow), visibility var(--transition-slow);
    will-change: opacity, visibility;
}

body.light-theme .modal-overlay {
    background-color: rgba(242, 236, 247, 0.85);
}

.modal-overlay.show {
    opacity: 1;
    visibility: visible;
}

.modal-content {
    background-color: var(--color-surface);
    border: 1px solid var(--color-outline-variant);
    border-radius: var(--radius-xlarge);
    padding: 56px;
    width: 100%;
    max-width: 680px;
    box-shadow: var(--shadow-elevation-4);
    position: relative;
    transform: translateY(24px);
    transition: transform var(--transition-slow);
    will-change: transform;
}

.modal-overlay.show .modal-content {
    transform: translateY(0);
}

.modal-close {
    position: absolute;
    top: 28px;
    right: 28px;
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-full);
    background-color: var(--color-surface-variant);
    color: var(--color-text-muted);
    transition: background-color var(--transition-fast), color var(--transition-fast);
}

.modal-close:hover {
    background-color: var(--color-primary-container);
    color: var(--color-on-primary-container);
}

.modal-close svg {
    width: 20px;
    height: 20px;
}

.modal-title {
    font-family: var(--font-heading-bold);
    font-size: 2.5rem;
    font-weight: 800;
    letter-spacing: -0.03em;
    color: var(--color-text);
    margin-bottom: 16px;
}

.modal-desc {
    font-family: var(--font-heading-serif);
    font-size: 1.15rem;
    font-style: italic;
    color: var(--color-text-muted);
    margin-bottom: 40px;
}

/* Payment Support Dialog Elements */
.payment-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 28px;
}

.payment-card {
    background-color: var(--color-surface-variant);
    border-radius: var(--radius-large);
    padding: 28px;
    display: flex;
    flex-direction: column;
    align-items: center;
    border: 1px solid transparent;
    transition: border-color var(--transition-slow);
}

.payment-card:hover {
    border-color: var(--color-outline);
}

.payment-label {
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: 20px;
}

.qr-container {
    width: 190px;
    height: 190px;
    border-radius: var(--radius-medium);
    overflow: hidden;
    background-color: #ffffff;
    padding: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-elevation-1);
}

.qr-img {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

/* Dynamic Legal Modals Custom Layout */
.compliance-modal-content {
    max-width: 840px;
    max-height: 85vh;
    overflow-y: auto;
    scrollbar-width: thin;
    scrollbar-color: var(--color-outline-variant) transparent;
}

#complianceModalBody {
    font-family: var(--font-primary);
    line-height: 1.8;
    color: var(--color-text-muted);
}

#complianceModalBody h1 {
    font-family: var(--font-heading-bold);
    font-size: 2.5rem;
    color: var(--color-text);
    margin-bottom: 28px;
}

#complianceModalBody h2 {
    font-family: var(--font-heading-bold);
    font-size: 1.625rem;
    color: var(--color-text);
    margin-top: 40px;
    margin-bottom: 18px;
}

#complianceModalBody p {
    margin-bottom: 18px;
}

#complianceModalBody ul {
    list-style-position: inside;
    margin-bottom: 28px;
    padding-left: 12px;
}

#complianceModalBody li {
    margin-bottom: 10px;
}

#complianceModalBody a {
    color: var(--color-primary);
    text-decoration: underline;
}

/* ==========================================================================
   12. COOKIE CONSENT SYSTEM BANNER
   ========================================================================== */

.cookie-banner {
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
    z-index: 900;
    background-color: var(--color-surface);
    border-top: 1px solid var(--color-outline-variant);
    box-shadow: var(--shadow-elevation-3);
    padding: 28px 0;
    transform: translateY(100%);
    opacity: 0;
    visibility: hidden;
    transition: transform var(--transition-slow), 
                opacity var(--transition-slow), 
                visibility var(--transition-slow);
    will-change: transform, opacity;
}

.cookie-banner.show {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
}

.cookie-content {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 32px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 40px;
}

.cookie-content span {
    font-family: var(--font-primary);
    font-size: 0.9375rem;
    color: var(--color-text-muted);
    line-height: 1.6;
}

.cookie-accept-btn {
    font-size: 0.875rem;
    font-weight: 700;
    padding: 12px 28px;
    border-radius: var(--radius-medium);
    background-color: var(--color-primary);
    color: var(--color-on-primary);
    transition: background-color var(--transition-fast), transform var(--transition-fast);
}

.cookie-accept-btn:hover {
    background-color: var(--color-primary-container);
    color: var(--color-on-primary-container);
    transform: translateY(-2px);
}

/* ==========================================================================
   13. FOOTER & COPYRIGHT COMPLIANCE PANELS
   ========================================================================== */

footer {
    border-top: 1px solid var(--color-outline-variant);
    padding: 80px 0;
    background-color: var(--color-surface);
    position: relative;
    z-index: 10;
}

footer .container {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
}

.compliance-links {
    display: flex;
    justify-content: center;
    gap: 40px;
    margin-bottom: 40px;
    flex-wrap: wrap;
}

.comp-link-btn {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--color-text-muted);
    position: relative;
    transition: color var(--transition-fast);
}

.comp-link-btn::after {
    content: '';
    position: absolute;
    bottom: -6px;
    left: 0;
    width: 100%;
    height: 1.5px;
    background-color: var(--color-primary);
    transform: scaleX(0);
    transform-origin: right;
    transition: transform var(--transition-fast);
}

.comp-link-btn:hover {
    color: var(--color-text);
}

.comp-link-btn:hover::after {
    transform: scaleX(1);
    transform-origin: left;
}

.copyright {
    font-size: 0.8125rem;
    color: var(--color-outline);
}

/* ==========================================================================
   14. SCROLL REVEAL SCENICS STAGE MACHINE
   ========================================================================== */

.reveal {
    opacity: 0;
    transform: translateY(16px);
    transition: opacity var(--transition-cosmic), transform var(--transition-cosmic);
    will-change: opacity, transform;
}

.reveal.active {
    opacity: 1;
    transform: translateY(0);
}

/* ==========================================================================
   15. KEYFRAME ANIMATION TIMELINES
   ========================================================================== */

@keyframes slowDriftPurple {
    0% {
        transform: translate3d(0, 0, 0) scale(1);
    }
    50% {
        transform: translate3d(6%, 10%, 0) scale(1.08);
    }
    100% {
        transform: translate3d(-4%, -6%, 0) scale(0.97);
    }
}

@keyframes slowDriftOrange {
    0% {
        transform: translate3d(0, 0, 0) scale(1);
    }
    50% {
        transform: translate3d(-8%, -5%, 0) scale(1.06);
    }
    100% {
        transform: translate3d(5%, 8%, 0) scale(0.94);
    }
}

/* Aurora background cosmic streamer drifting sweep timeline */
@keyframes auraSweepOne {
    0% {
        transform: translate3d(-6%, -6%, 0) rotate(-12deg);
        opacity: 0.08;
    }
    50% {
        opacity: 0.18;
    }
    100% {
        transform: translate3d(6%, 6%, 0) rotate(-10deg);
        opacity: 0.08;
    }
}

@keyframes auraSweepTwo {
    0% {
        transform: translate3d(6%, 6%, 0) rotate(-15deg);
        opacity: 0.07;
    }
    50% {
        opacity: 0.16;
    }
    100% {
        transform: translate3d(-5%, -5%, 0) rotate(-13deg);
        opacity: 0.07;
    }
}

/* Astronomical space shooting meteor system */
@keyframes shootMeteor {
    0% {
        transform: translate3d(0, 0, 0) rotate(45deg);
        opacity: 0;
    }
    1% {
        opacity: 0.8;
    }
    12% {
        transform: translate3d(320px, 320px, 0) rotate(45deg);
        opacity: 0;
    }
    100% {
        transform: translate3d(320px, 320px, 0) rotate(45deg);
        opacity: 0;
    }
}

/* Shimmering fluid multi-spectral background sweep */
@keyframes shimmerGradient {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

@keyframes floatRotateA {
    0% {
        transform: translate3d(0, 0, 0) rotate(0deg);
    }
    50% {
        transform: translate3d(15px, -15px, 0) rotate(180deg);
    }
    100% {
        transform: translate3d(0, 0, 0) rotate(360deg);
    }
}

@keyframes floatRotateB {
    0% {
        transform: translate3d(0, 0, 0) rotate(0deg);
    }
    50% {
        transform: translate3d(-10px, 20px, 0) rotate(-180deg);
    }
    100% {
        transform: translate3d(0, 0, 0) rotate(-360deg);
    }
}

@keyframes floatRotateC {
    0% {
        transform: translate3d(0, 0, 0) rotate(0deg);
    }
    50% {
        transform: translate3d(-15px, -10px, 0) rotate(180deg);
    }
    100% {
        transform: translate3d(0, 0, 0) rotate(360deg);
    }
}

/* Streak keyframes removed */

@keyframes circularSpin {
    from {
        transform: rotate(0deg);
    }
    to {
        transform: rotate(360deg);
    }
}

@keyframes simplePulse {
    0%, 100% {
        opacity: 0.75;
        transform: scale(0.96);
    }
    50% {
        opacity: 1;
        transform: scale(1.04);
    }
}

@keyframes gentleSoundWave {
    0% {
        transform: scaleY(0.2);
    }
    100% {
        transform: scaleY(1);
    }
}

/* premium dynamic scrolling and breathing dot matrix transitions with morphing shapes */
@keyframes dotMatrixFlow1 {
    0%, 100% {
        width: 120px;
        height: 240px;
        border-radius: var(--radius-medium);
        background-position: 0px 0px;
        transform: translate3d(0, 0, 0);
        opacity: 0.35;
    }
    50% {
        width: 180px; /* morphs smoothly between a vertical rect and a wider rounded format */
        height: 180px;
        border-radius: var(--radius-xlarge);
        background-position: 24px 48px;
        transform: translate3d(12px, -18px, 0);
        opacity: 0.85; /* high visibility breathing peak */
    }
}

@keyframes dotMatrixFlow2 {
    0%, 100% {
        width: 120px;
        height: 240px;
        border-radius: var(--radius-medium);
        background-position: 0px 0px;
        transform: translate3d(0, 0, 0);
        opacity: 0.35;
    }
    50% {
        width: 220px; /* morphs smoothly to a wide landscape pill format */
        height: 130px;
        border-radius: var(--radius-large);
        background-position: -24px 24px;
        transform: translate3d(-12px, 18px, 0);
        opacity: 0.85;
    }
}