/* ==========================================================================
   SYSCORV LABS — CORE DESIGN SYSTEM & STYLESHEET (style.css)
   - Obsidian Dark & Titanium Light Cybernetic Themes
   - Glassmorphism, Neon Cyan & Electric Blue Accents
   - Single Featured PassMap Master Showcase & Ecosystem Pipeline
   - Interactive Canvas Mouse Spotlight (Butter-smooth, Zero Grids)
   ========================================================================== */

/* --- CSS Variables & Design Tokens --- */
:root {
    /* Obsidian Dark Theme (Default) */
    --sys-bg: #07090e;
    --sys-bg-alt: #0c1017;
    --sys-surface: rgba(15, 21, 34, 0.75);
    --sys-surface-hover: rgba(22, 31, 50, 0.85);
    --sys-surface-solid: #0f1522;
    --sys-card-bg: rgba(13, 18, 30, 0.75);
    --sys-border: rgba(56, 189, 248, 0.16);
    --sys-border-hover: rgba(0, 229, 255, 0.45);
    --sys-border-subtle: rgba(255, 255, 255, 0.08);

    /* Accents */
    --sys-cyan: #00e5ff;
    --sys-cyan-glow: rgba(0, 229, 255, 0.28);
    --sys-cyan-dim: rgba(0, 229, 255, 0.12);
    --sys-blue: #0284c7;
    --sys-blue-glow: rgba(2, 132, 199, 0.35);
    --sys-sky: #38bdf8;
    --sys-royal: #2563eb;
    --sys-emerald: #10b981;

    /* Typography */
    --sys-text: #f1f5f9;
    --sys-text-muted: #94a3b8;
    --sys-text-dim: #64748b;
    --sys-text-heading: #ffffff;

    /* Shadows & Effects */
    --sys-shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.4);
    --sys-shadow-md: 0 8px 24px rgba(0, 0, 0, 0.5);
    --sys-shadow-glow: 0 0 35px rgba(0, 229, 255, 0.16);
    --sys-glass-blur: blur(14px);

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

    /* Layout */
    --max-w: 1240px;
    --header-h: 72px;
    --radius-sm: 8px;
    --radius-md: 14px;
    --radius-lg: 20px;
    --radius-pill: 9999px;
    --transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

/* Light Mode Tokens (Titanium Light) */
body[data-theme-mode="light"] {
    --sys-bg: #f8fafc;
    --sys-bg-alt: #f1f5f9;
    --sys-surface: rgba(255, 255, 255, 0.85);
    --sys-surface-hover: rgba(255, 255, 255, 0.95);
    --sys-surface-solid: #ffffff;
    --sys-card-bg: rgba(255, 255, 255, 0.88);
    --sys-border: rgba(2, 132, 199, 0.2);
    --sys-border-hover: rgba(2, 132, 199, 0.5);
    --sys-border-subtle: rgba(0, 0, 0, 0.08);

    --sys-cyan: #0284c7;
    --sys-cyan-glow: rgba(2, 132, 199, 0.2);
    --sys-cyan-dim: rgba(2, 132, 199, 0.08);
    --sys-blue: #0369a1;
    --sys-blue-glow: rgba(3, 105, 161, 0.2);

    --sys-text: #0f172a;
    --sys-text-muted: #475569;
    --sys-text-dim: #64748b;
    --sys-text-heading: #090d16;

    --sys-shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.06);
    --sys-shadow-md: 0 10px 30px rgba(0, 0, 0, 0.08);
    --sys-shadow-glow: 0 0 35px rgba(2, 132, 199, 0.12);
}

/* --- Base & Reset --- */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
    -webkit-text-size-adjust: 100%;
}

body {
    background-color: var(--sys-bg);
    color: var(--sys-text);
    font-family: var(--font-body);
    line-height: 1.6;
    overflow-x: hidden;
    position: relative;
    transition: background-color 0.3s ease, color 0.3s ease;
    min-height: 100vh;
}

/* Interactive Canvas Mouse Spotlight (Pure ambient light, no grids, no lines) */
#cyber-canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 0;
}

.ambient-glow {
    position: fixed;
    top: -15%;
    left: 50%;
    transform: translateX(-50%);
    width: 900px;
    height: 600px;
    background: radial-gradient(ellipse at center, rgba(0, 229, 255, 0.08) 0%, transparent 68%);
    pointer-events: none;
    z-index: 0;
    filter: blur(40px);
}

body[data-theme-mode="light"] .ambient-glow {
    background: radial-gradient(ellipse at center, rgba(2, 132, 199, 0.09) 0%, transparent 68%);
}

/* Typography Helpers */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    color: var(--sys-text-heading);
    line-height: 1.2;
    font-weight: 700;
}

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

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

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

/* --- Main Navigation Bar --- */
.sys-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: var(--header-h);
    z-index: 1000;
    background: var(--sys-surface);
    backdrop-filter: var(--sys-glass-blur);
    -webkit-backdrop-filter: var(--sys-glass-blur);
    border-bottom: 1px solid var(--sys-border);
    transition: var(--transition);
}

.header-container {
    max-width: var(--max-w);
    margin: 0 auto;
    height: 100%;
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
}

/* Brand Mark */
.sys-brand {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
    cursor: pointer;
}

.brand-logo-wrap {
    position: relative;
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.brand-logo-img {
    width: 36px;
    height: 36px;
    object-fit: contain;
    filter: drop-shadow(0 0 8px var(--sys-cyan-glow));
    transition: var(--transition);
}

.sys-brand:hover .brand-logo-img {
    transform: scale(1.08);
    filter: drop-shadow(0 0 14px var(--sys-cyan));
}

.brand-name {
    font-family: var(--font-heading);
    font-size: 1.28rem;
    font-weight: 800;
    letter-spacing: 0.12em;
    color: var(--sys-text-heading);
    background: linear-gradient(135deg, #ffffff 30%, var(--sys-sky) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

body[data-theme-mode="light"] .brand-name {
    background: linear-gradient(135deg, #0f172a 30%, var(--sys-blue) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* Desktop Links */
.sys-nav-desktop {
    display: none;
    align-items: center;
    gap: 28px;
}

@media (min-width: 860px) {
    .sys-nav-desktop {
        display: flex;
    }
}

.nav-link {
    font-size: 0.88rem;
    font-weight: 600;
    color: var(--sys-text-muted);
    transition: var(--transition);
    position: relative;
    padding: 6px 0;
}

.nav-link:hover, .nav-link.active {
    color: var(--sys-cyan);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--sys-cyan);
    border-radius: 2px;
    transition: var(--transition);
}

.nav-link:hover::after, .nav-link.active::after {
    width: 100%;
}

/* Header Controls */
.sys-header-controls {
    display: flex;
    align-items: center;
    gap: 12px;
}

.control-btn {
    width: 38px;
    height: 38px;
    border-radius: var(--radius-sm);
    background: var(--sys-surface);
    border: 1px solid var(--sys-border);
    color: var(--sys-text);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.control-btn:hover {
    border-color: var(--sys-cyan);
    color: var(--sys-cyan);
    box-shadow: 0 0 12px var(--sys-cyan-glow);
}

/* Launch App Quick CTA */
.launch-app-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 18px;
    border-radius: var(--radius-pill);
    background: linear-gradient(135deg, var(--sys-cyan) 0%, var(--sys-blue) 100%);
    color: #050b14 !important;
    font-size: 0.82rem;
    font-weight: 700;
    letter-spacing: 0.03em;
    transition: var(--transition);
    box-shadow: 0 0 16px var(--sys-cyan-glow);
}

.launch-app-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 0 24px rgba(0, 229, 255, 0.45);
}

.desktop-only {
    display: none;
}

@media (min-width: 860px) {
    .desktop-only {
        display: inline-flex;
    }
}

/* Mobile Hamburger Toggle */
.mobile-menu-btn {
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    padding: 8px;
}

@media (min-width: 860px) {
    .mobile-menu-btn {
        display: none;
    }
}

.hamburger-bar {
    width: 18px;
    height: 2px;
    background: var(--sys-text);
    border-radius: 2px;
    transition: var(--transition);
}

/* --- Mobile Drawer Menu --- */
.mobile-drawer {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    z-index: 2000;
    pointer-events: none;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.mobile-drawer.open {
    pointer-events: auto;
    opacity: 1;
}

.drawer-backdrop {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(8px);
}

.drawer-panel {
    position: absolute;
    top: 0;
    right: 0;
    width: 80%;
    max-width: 320px;
    height: 100%;
    background: var(--sys-surface-solid);
    border-left: 1px solid var(--sys-border);
    padding: 24px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    transform: translateX(100%);
    transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    box-shadow: -10px 0 30px rgba(0, 0, 0, 0.5);
}

.mobile-drawer.open .drawer-panel {
    transform: translateX(0);
}

.drawer-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.drawer-nav {
    display: flex;
    flex-direction: column;
    gap: 18px;
    margin: 36px 0;
}

.drawer-link {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--sys-text);
    transition: var(--transition);
}

.drawer-link:hover {
    color: var(--sys-cyan);
    padding-left: 6px;
}

.full-width {
    width: 100%;
    justify-content: center;
}

/* --- Hero Section --- */
.sys-hero {
    position: relative;
    padding-top: calc(var(--header-h) + 40px);
    padding-bottom: 60px;
    z-index: 10;
}

.hero-container {
    max-width: var(--max-w);
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
}

/* Cybernetic Raven Visual Centerpiece */
.hero-visual-frame {
    position: relative;
    width: 240px;
    height: 200px;
    margin-bottom: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
}

@media (min-width: 768px) {
    .hero-visual-frame {
        width: 320px;
        height: 240px;
        margin-bottom: 36px;
    }
}

.raven-halo-ring {
    position: absolute;
    width: 100%;
    height: 100%;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(0, 229, 255, 0.16) 0%, rgba(2, 132, 199, 0.06) 50%, transparent 70%);
    filter: blur(28px);
    animation: ringPulse 4s infinite alternate ease-in-out;
}

@keyframes ringPulse {
    0% { transform: scale(0.92); opacity: 0.6; }
    100% { transform: scale(1.12); opacity: 1; }
}

.raven-optic-core {
    position: relative;
    z-index: 2;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.hero-raven-img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    filter: drop-shadow(0 10px 25px rgba(0, 0, 0, 0.7)) drop-shadow(0 0 24px var(--sys-cyan-glow));
    transition: transform 0.4s ease;
}

.hero-visual-frame:hover .hero-raven-img {
    transform: scale(1.04) translateY(-3px);
}

/* Hero Content */
.hero-content {
    max-width: 860px;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.hero-tag-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 16px;
    border-radius: var(--radius-pill);
    background: var(--sys-cyan-dim);
    border: 1px solid var(--sys-border);
    font-family: var(--font-mono);
    font-size: 0.72rem;
    font-weight: 700;
    color: var(--sys-sky);
    letter-spacing: 0.08em;
    margin-bottom: 22px;
}

.badge-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--sys-cyan);
    box-shadow: 0 0 6px var(--sys-cyan);
}

.hero-title {
    font-size: 2.2rem;
    font-weight: 800;
    letter-spacing: -0.02em;
    margin-bottom: 20px;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

@media (min-width: 640px) {
    .hero-title { font-size: 3.1rem; }
}

@media (min-width: 992px) {
    .hero-title { font-size: 3.8rem; }
}

.gradient-text {
    background: linear-gradient(135deg, #ffffff 40%, var(--sys-sky) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

body[data-theme-mode="light"] .gradient-text {
    background: linear-gradient(135deg, #0f172a 40%, var(--sys-blue) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.highlight-text {
    color: var(--sys-cyan);
    text-shadow: 0 0 30px var(--sys-cyan-glow);
}

.hero-subtitle {
    font-size: 1.05rem;
    color: var(--sys-text-muted);
    line-height: 1.7;
    margin-bottom: 36px;
    max-width: 720px;
}

@media (min-width: 768px) {
    .hero-subtitle { font-size: 1.18rem; }
}

.hero-subtitle strong,
.entity-text strong,
.syscorv-brand-highlight {
    color: #00e5ff;
    font-weight: 800;
    letter-spacing: 0.05em;
    text-shadow: 0 0 10px rgba(0, 229, 255, 0.45);
}

body[data-theme-mode="light"] .hero-subtitle strong,
body[data-theme-mode="light"] .entity-text strong,
body[data-theme-mode="light"] .syscorv-brand-highlight {
    color: #0284c7;
    text-shadow: none;
}

.hero-subtitle em {
    color: var(--sys-cyan);
    font-style: normal;
    font-family: var(--font-mono);
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: center;
    gap: 16px;
    width: 100%;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 13px 28px;
    border-radius: var(--radius-sm);
    font-family: var(--font-heading);
    font-size: 0.94rem;
    font-weight: 700;
    letter-spacing: 0.03em;
    transition: var(--transition);
    cursor: pointer;
    text-decoration: none;
}

.btn-primary {
    background: linear-gradient(135deg, var(--sys-cyan) 0%, var(--sys-blue) 100%);
    color: #050b14;
    box-shadow: 0 0 20px var(--sys-cyan-glow);
    border: 1px solid transparent;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 0 30px rgba(0, 229, 255, 0.45);
}

.btn-secondary {
    background: var(--sys-surface);
    color: var(--sys-text);
    border: 1px solid var(--sys-border);
    backdrop-filter: var(--sys-glass-blur);
}

.btn-secondary:hover {
    border-color: var(--sys-cyan);
    color: var(--sys-cyan);
    transform: translateY(-2px);
    box-shadow: 0 0 20px var(--sys-cyan-dim);
}

/* Technical Telemetry Strip */
.telemetry-strip {
    max-width: var(--max-w);
    margin: 50px auto 0;
    padding: 0 24px;
    display: grid;
    grid-template-columns: 1fr;
    gap: 16px;
}

@media (min-width: 600px) {
    .telemetry-strip { grid-template-columns: repeat(2, 1fr); }
}

@media (min-width: 992px) {
    .telemetry-strip { grid-template-columns: repeat(4, 1fr); }
}

.telemetry-item {
    background: var(--sys-card-bg);
    backdrop-filter: var(--sys-glass-blur);
    border: 1px solid var(--sys-border-subtle);
    border-radius: var(--radius-md);
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 4px;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.telemetry-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 3px;
    height: 100%;
    background: var(--sys-cyan);
    opacity: 0.6;
    transition: var(--transition);
}

.telemetry-item:hover {
    border-color: var(--sys-border);
    transform: translateY(-2px);
    box-shadow: var(--sys-shadow-md);
}

.telemetry-item:hover::before {
    opacity: 1;
    box-shadow: 0 0 10px var(--sys-cyan);
}

.telemetry-label {
    font-family: var(--font-mono);
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 0.1em;
    color: var(--sys-sky);
}

.telemetry-value {
    font-family: var(--font-heading);
    font-size: 1.3rem;
    font-weight: 800;
    color: var(--sys-text-heading);
}

.telemetry-sub {
    font-size: 0.82rem;
    color: var(--sys-text-muted);
}

/* --- Section Structural Elements --- */
.sys-section {
    position: relative;
    padding: 80px 0;
    z-index: 10;
}

.section-container {
    max-width: var(--max-w);
    margin: 0 auto;
    padding: 0 24px;
}

.section-header {
    margin-bottom: 44px;
}

.section-index {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-family: var(--font-mono);
    font-size: 0.8rem;
    font-weight: 700;
    color: var(--sys-cyan);
    letter-spacing: 0.12em;
    margin-bottom: 12px;
}

.index-num {
    background: var(--sys-cyan-dim);
    border: 1px solid var(--sys-border);
    padding: 2px 8px;
    border-radius: 4px;
}

.section-title {
    font-size: 2.1rem;
    font-weight: 800;
    letter-spacing: -0.01em;
    margin-bottom: 12px;
}

@media (min-width: 768px) {
    .section-title { font-size: 2.6rem; }
}

.section-desc {
    font-size: 1.05rem;
    color: var(--sys-text-muted);
    max-width: 680px;
    line-height: 1.6;
}

/* --- Ecosystem Section: Masterpiece PassMap Card --- */
.passmap-hero-wrapper {
    width: 100%;
}

.passmap-master-card {
    position: relative;
    background: var(--sys-card-bg);
    backdrop-filter: var(--sys-glass-blur);
    -webkit-backdrop-filter: var(--sys-glass-blur);
    border: 1.5px solid rgba(0, 229, 255, 0.25);
    border-radius: var(--radius-lg);
    padding: 36px;
    overflow: hidden;
    transition: var(--transition);
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.6), 0 0 35px rgba(0, 229, 255, 0.1);
}

@media (min-width: 768px) {
    .passmap-master-card {
        padding: 44px;
    }
}

.passmap-master-card:hover {
    border-color: rgba(0, 229, 255, 0.5);
    box-shadow: 0 16px 50px rgba(0, 0, 0, 0.7), 0 0 50px rgba(0, 229, 255, 0.2);
    transform: translateY(-2px);
}

.passmap-card-glow {
    position: absolute;
    top: -30%;
    right: -20%;
    width: 600px;
    height: 600px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(0, 229, 255, 0.08) 0%, rgba(2, 132, 199, 0.04) 50%, transparent 70%);
    pointer-events: none;
}

.passmap-card-inner {
    position: relative;
    z-index: 2;
    display: flex;
    flex-direction: column;
    gap: 26px;
}

.passmap-header-row {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

@media (min-width: 768px) {
    .passmap-header-row {
        flex-direction: row;
        align-items: center;
        justify-content: space-between;
    }
}

.passmap-identity {
    display: flex;
    align-items: center;
    gap: 18px;
}

.passmap-icon-box {
    width: 68px;
    height: 68px;
    border-radius: var(--radius-md);
    background: rgba(0, 0, 0, 0.4);
    border: 1.5px solid var(--sys-cyan);
    box-shadow: 0 0 20px var(--sys-cyan-glow);
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.passmap-icon-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.passmap-titles {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.passmap-title-line {
    display: flex;
    align-items: center;
    gap: 12px;
}

.passmap-title {
    font-size: 1.9rem;
    font-weight: 800;
    color: var(--sys-text-heading);
}

.passmap-version-badge {
    font-family: var(--font-mono);
    font-size: 0.76rem;
    font-weight: 700;
    padding: 3px 8px;
    border-radius: 4px;
    background: var(--sys-cyan-dim);
    color: var(--sys-cyan);
    border: 1px solid var(--sys-border);
}

.passmap-subtitle {
    font-size: 0.88rem;
    color: var(--sys-sky);
    font-weight: 600;
    letter-spacing: 0.04em;
}

.passmap-status-pill {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 14px;
    border-radius: var(--radius-pill);
    background: rgba(16, 185, 129, 0.12);
    border: 1px solid rgba(16, 185, 129, 0.35);
    font-family: var(--font-mono);
    font-size: 0.74rem;
    font-weight: 700;
    color: #10b981;
    width: fit-content;
}

.live-pulse-dot {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: #10b981;
    box-shadow: 0 0 8px #10b981;
    animation: pulseBeacon 2s infinite ease-in-out;
}

.passmap-description {
    font-size: 1.05rem;
    color: var(--sys-text-muted);
    line-height: 1.75;
}

.passmap-description strong {
    color: var(--sys-text-heading);
}

/* Feature Grid Highlights */
.passmap-features-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 16px;
}

@media (min-width: 640px) {
    .passmap-features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 992px) {
    .passmap-features-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

.feature-box {
    background: var(--sys-surface);
    border: 1px solid var(--sys-border);
    border-radius: var(--radius-md);
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 12px;
    transition: var(--transition);
}

.feature-box:hover {
    border-color: var(--sys-cyan);
    transform: translateY(-2px);
    box-shadow: var(--sys-shadow-sm);
}

.feature-icon {
    width: 38px;
    height: 38px;
    border-radius: var(--radius-sm);
    background: var(--sys-cyan-dim);
    color: var(--sys-cyan);
    display: flex;
    align-items: center;
    justify-content: center;
}

.feature-content h4 {
    font-size: 0.95rem;
    font-weight: 700;
    margin-bottom: 4px;
}

.feature-content p {
    font-size: 0.82rem;
    color: var(--sys-text-muted);
    line-height: 1.5;
}

/* PassMap Footer Row */
.passmap-footer-row {
    display: flex;
    flex-direction: column;
    gap: 20px;
    padding-top: 20px;
    border-top: 1px solid var(--sys-border-subtle);
}

@media (min-width: 768px) {
    .passmap-footer-row {
        flex-direction: row;
        align-items: center;
        justify-content: space-between;
    }
}

.card-tech-chips {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.chip {
    font-family: var(--font-mono);
    font-size: 0.72rem;
    padding: 4px 10px;
    border-radius: 4px;
    background: var(--sys-surface);
    border: 1px solid var(--sys-border);
    color: var(--sys-sky);
}

.btn-passmap-launch {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 14px 30px;
    border-radius: var(--radius-sm);
    background: linear-gradient(135deg, var(--sys-cyan) 0%, var(--sys-blue) 100%);
    color: #050b14;
    font-weight: 800;
    font-size: 0.96rem;
    letter-spacing: 0.02em;
    transition: var(--transition);
    box-shadow: 0 0 25px var(--sys-cyan-glow);
    white-space: nowrap;
}

.btn-passmap-launch:hover {
    box-shadow: 0 0 35px rgba(0, 229, 255, 0.5);
    transform: translateY(-2px);
}

/* Ecosystem Pipeline Card */
.ecosystem-pipeline-card {
    margin-top: 24px;
    background: var(--sys-surface);
    border: 1px solid var(--sys-border-subtle);
    border-radius: var(--radius-md);
    padding: 20px 24px;
    display: flex;
    flex-direction: column;
    gap: 8px;
    transition: var(--transition);
}

.ecosystem-pipeline-card:hover {
    border-color: var(--sys-border);
}

.pipeline-badge {
    font-family: var(--font-mono);
    font-size: 0.72rem;
    font-weight: 700;
    color: var(--sys-cyan);
    letter-spacing: 0.08em;
}

.pipeline-text {
    font-size: 0.88rem;
    color: var(--sys-text-muted);
    line-height: 1.6;
}

/* --- Architecture & Engineering Pillars --- */
.pillars-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 24px;
}

@media (min-width: 680px) {
    .pillars-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (min-width: 1040px) {
    .pillars-grid { grid-template-columns: repeat(4, 1fr); }
}

.pillar-card {
    background: var(--sys-card-bg);
    backdrop-filter: var(--sys-glass-blur);
    border: 1px solid var(--sys-border-subtle);
    border-radius: var(--radius-md);
    padding: 30px 24px;
    position: relative;
    transition: var(--transition);
    overflow: hidden;
}

.pillar-card:hover {
    border-color: var(--sys-border);
    transform: translateY(-4px);
    box-shadow: var(--sys-shadow-md);
}

.pillar-num {
    position: absolute;
    top: 16px;
    right: 20px;
    font-family: var(--font-mono);
    font-size: 1.8rem;
    font-weight: 800;
    color: var(--sys-border);
    opacity: 0.5;
}

.pillar-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-sm);
    background: var(--sys-cyan-dim);
    color: var(--sys-cyan);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
    border: 1px solid var(--sys-border);
}

.pillar-title {
    font-size: 1.25rem;
    font-weight: 800;
    margin-bottom: 12px;
}

.pillar-text {
    font-size: 0.9rem;
    color: var(--sys-text-muted);
    line-height: 1.6;
}

/* --- Transmissions (News) Section --- */
.news-stream-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 24px;
}

@media (min-width: 768px) {
    .news-stream-grid { grid-template-columns: repeat(3, 1fr); }
}

.news-card {
    background: var(--sys-card-bg);
    backdrop-filter: var(--sys-glass-blur);
    border: 1px solid var(--sys-border-subtle);
    border-radius: var(--radius-md);
    padding: 24px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    gap: 16px;
    transition: var(--transition);
    cursor: pointer;
}

.news-card:hover {
    border-color: var(--sys-border-hover);
    transform: translateY(-3px);
    box-shadow: var(--sys-shadow-md);
}

.news-card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
}

.news-pill {
    font-family: var(--font-mono);
    font-size: 0.68rem;
    font-weight: 700;
    color: var(--sys-cyan);
    background: var(--sys-cyan-dim);
    padding: 3px 8px;
    border-radius: 4px;
}

.news-date {
    font-family: var(--font-mono);
    font-size: 0.74rem;
    color: var(--sys-text-dim);
    letter-spacing: 0.4px;
    display: inline-flex;
    align-items: center;
    gap: 4px;
}

.date-num {
    color: var(--sys-cyan);
    font-weight: 800;
}

.date-month {
    color: var(--sys-text-muted);
    font-weight: 600;
    text-transform: uppercase;
}

body[data-theme-mode="light"] .date-num {
    color: #0284c7;
}

body[data-theme-mode="light"] .date-month {
    color: #64748b;
}

.news-card-title {
    font-size: 1.2rem;
    font-weight: 700;
    line-height: 1.35;
    color: var(--sys-text-heading);
    transition: color 0.2s;
}

.news-card:hover .news-card-title {
    color: var(--sys-cyan);
}

.news-card-excerpt {
    font-size: 0.9rem;
    color: var(--sys-text-muted);
    line-height: 1.6;
}

.news-read-more {
    font-family: var(--font-heading);
    font-size: 0.84rem;
    font-weight: 700;
    color: var(--sys-cyan);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding-top: 12px;
    border-top: 1px solid var(--sys-border-subtle);
    width: 100%;
    text-align: center;
    margin-top: auto;
}

/* --- Founder Section --- */
.founder-card {
    background: var(--sys-card-bg);
    backdrop-filter: var(--sys-glass-blur);
    border: 1.5px solid var(--sys-border-subtle);
    border-radius: var(--radius-lg);
    padding: 36px;
    display: flex;
    flex-direction: column;
    gap: 28px;
    transition: var(--transition);
}

@media (min-width: 768px) {
    .founder-card {
        flex-direction: row;
        align-items: center;
        gap: 40px;
        padding: 44px;
    }
}

.founder-card:hover {
    border-color: var(--sys-border-hover);
    box-shadow: var(--sys-shadow-md), var(--sys-shadow-glow);
}

.founder-avatar-wrap {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    flex-shrink: 0;
}

.founder-avatar-frame {
    width: 140px;
    height: 140px;
    border-radius: 50%;
    border: 2px solid var(--sys-cyan);
    box-shadow: 0 0 25px var(--sys-cyan-glow);
    overflow: hidden;
    background: #000;
}

.founder-avatar-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.founder-badge {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    font-weight: 700;
    color: var(--sys-cyan);
    background: var(--sys-cyan-dim);
    padding: 3px 10px;
    border-radius: var(--radius-pill);
    border: 1px solid var(--sys-border);
}

.founder-headline {
    display: flex;
    align-items: baseline;
    gap: 10px;
    margin-bottom: 6px;
}

.founder-name {
    font-size: 1.8rem;
    font-weight: 800;
}

.founder-alias {
    font-family: var(--font-mono);
    font-size: 1.1rem;
    color: var(--sys-cyan);
}

.founder-role {
    font-size: 1rem;
    font-weight: 600;
    color: var(--sys-sky);
    margin-bottom: 14px;
}

.founder-bio {
    font-size: 0.96rem;
    color: var(--sys-text-muted);
    line-height: 1.7;
    margin-bottom: 22px;
}

.founder-links {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 14px;
}

.social-chip {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 10px 18px;
    border-radius: var(--radius-sm);
    background: var(--sys-surface);
    border: 1px solid var(--sys-border);
    color: var(--sys-text);
    font-size: 0.88rem;
    font-weight: 600;
    transition: var(--transition);
}

.social-chip:hover {
    border-color: var(--sys-cyan);
    color: var(--sys-cyan);
}

/* --- Communications & Contact Section --- */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 24px;
}

@media (min-width: 860px) {
    .contact-grid { grid-template-columns: repeat(2, 1fr); }
}

.contact-card {
    background: var(--sys-card-bg);
    backdrop-filter: var(--sys-glass-blur);
    border: 1px solid var(--sys-border-subtle);
    border-radius: var(--radius-lg);
    padding: 32px;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.contact-card-title {
    font-size: 1.4rem;
    font-weight: 800;
}

.contact-intro {
    font-size: 0.95rem;
    color: var(--sys-text-muted);
}

.contact-row {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 16px;
    border-radius: var(--radius-md);
    background: var(--sys-surface);
    border: 1px solid var(--sys-border-subtle);
}

.row-icon {
    width: 42px;
    height: 42px;
    border-radius: 50%;
    background: var(--sys-cyan-dim);
    color: var(--sys-cyan);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.row-text {
    display: flex;
    flex-direction: column;
}

.row-label {
    font-size: 0.74rem;
    color: var(--sys-text-dim);
    font-family: var(--font-mono);
}

.row-link {
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--sys-cyan);
    word-break: break-all;
}

.entity-box {
    margin-top: 10px;
    padding: 18px;
    border-radius: var(--radius-md);
    background: rgba(0, 0, 0, 0.2);
    border-left: 3px solid var(--sys-cyan);
}

.entity-badge {
    font-family: var(--font-mono);
    font-size: 0.68rem;
    font-weight: 700;
    color: var(--sys-sky);
    margin-bottom: 6px;
}

.entity-text {
    font-size: 0.88rem;
    color: var(--sys-text-muted);
    line-height: 1.6;
}

/* Contact Form */
.sys-form {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.form-group label {
    font-size: 0.84rem;
    font-weight: 600;
    color: var(--sys-text-muted);
}

.form-group input, .form-group textarea {
    width: 100%;
    padding: 11px 14px;
    border-radius: var(--radius-sm);
    background: var(--sys-surface-solid);
    border: 1px solid var(--sys-border);
    color: var(--sys-text);
    font-family: var(--font-body);
    font-size: 0.92rem;
    transition: var(--transition);
}

.form-group input:focus, .form-group textarea:focus {
    outline: none;
    border-color: var(--sys-cyan);
    box-shadow: 0 0 12px var(--sys-cyan-dim);
}

.form-feedback {
    padding: 12px;
    border-radius: var(--radius-sm);
    font-size: 0.88rem;
    font-weight: 600;
    text-align: center;
}

.form-feedback.success {
    background: rgba(16, 185, 129, 0.15);
    color: #10b981;
    border: 1px solid rgba(16, 185, 129, 0.4);
}

.form-feedback.error {
    background: rgba(239, 68, 68, 0.15);
    color: #ef4444;
    border: 1px solid rgba(239, 68, 68, 0.4);
}

.hidden {
    display: none !important;
}

/* --- Modal Styles --- */
.sys-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    z-index: 3000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.modal-backdrop {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.75);
    backdrop-filter: blur(10px);
}

.modal-container {
    position: relative;
    z-index: 2;
    width: 100%;
    max-width: 700px;
    max-height: 88vh;
    background: var(--sys-bg-alt);
    border: 1.5px solid var(--sys-border);
    border-radius: var(--radius-md);
    padding: 20px 24px;
    box-shadow: 0 24px 60px rgba(0, 0, 0, 0.75), var(--sys-shadow-glow);
    display: flex;
    flex-direction: column;
    animation: modalAppear 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes modalAppear {
    from { opacity: 0; transform: scale(0.96) translateY(10px); }
    to { opacity: 1; transform: scale(1) translateY(0); }
}

.modal-close-btn {
    position: absolute;
    top: 14px;
    right: 14px;
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: linear-gradient(135deg, rgba(185, 28, 28, 0.45) 0%, rgba(69, 10, 10, 0.85) 100%);
    border: 1.5px solid rgba(239, 68, 68, 0.45);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fca5a5;
    font-size: 0.92rem;
    font-weight: 700;
    line-height: 1;
    cursor: pointer;
    z-index: 10;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.5), inset 0 1px 0 rgba(255, 255, 255, 0.15);
    transition: all var(--transition);
}

.modal-close-btn:hover {
    background: linear-gradient(135deg, #dc2626 0%, #991b1b 100%);
    border-color: #ef4444;
    color: #ffffff;
    box-shadow: 0 0 16px rgba(239, 68, 68, 0.6), inset 0 1px 0 rgba(255, 255, 255, 0.25);
    transform: translateY(-1px) scale(1.08);
}

.modal-close-btn:active {
    transform: scale(0.92);
}

body[data-theme-mode="light"] .modal-close-btn {
    background: linear-gradient(135deg, rgba(220, 38, 38, 0.15) 0%, rgba(185, 28, 28, 0.25) 100%);
    border-color: rgba(220, 38, 38, 0.35);
    color: #dc2626;
}

body[data-theme-mode="light"] .modal-close-btn:hover {
    background: linear-gradient(135deg, #dc2626 0%, #b91c1c 100%);
    border-color: #dc2626;
    color: #ffffff;
}

/* Card 1: Title & Category Card */
.modal-header-card {
    background: var(--sys-surface);
    border: 1px solid var(--sys-border-subtle);
    border-left: 3.5px solid var(--sys-cyan);
    border-radius: var(--radius-sm);
    padding: 14px 18px;
    margin-bottom: 14px;
    box-shadow: 0 4px 14px rgba(0, 0, 0, 0.25);
    position: relative;
    overflow: hidden;
}

.modal-header-card::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 120px;
    height: 100%;
    background: radial-gradient(circle at 0% 0%, rgba(0, 229, 255, 0.12) 0%, transparent 75%);
    pointer-events: none;
}

.modal-meta-top {
    display: flex;
    align-items: center;
    margin-bottom: 8px;
    padding-right: 36px;
}

.modal-title {
    font-size: 1.25rem;
    font-weight: 800;
    color: var(--sys-text-heading);
    line-height: 1.38;
    margin: 0;
    letter-spacing: -0.2px;
}

/* Card 2: Message Body Card */
.modal-body-card {
    background: var(--sys-card-bg);
    border: 1px solid var(--sys-border-subtle);
    border-radius: var(--radius-sm);
    padding: 20px 22px;
    display: flex;
    flex-direction: column;
    gap: 14px;
    max-height: 56vh;
    overflow-y: auto;
    scrollbar-width: thin;
    scrollbar-color: rgba(56, 189, 248, 0.25) transparent;
}

.modal-body-card::-webkit-scrollbar {
    width: 6px;
}
.modal-body-card::-webkit-scrollbar-track {
    background: transparent;
}
.modal-body-card::-webkit-scrollbar-thumb {
    background: rgba(56, 189, 248, 0.25);
    border-radius: 3px;
}
.modal-body-card::-webkit-scrollbar-thumb:hover {
    background: rgba(0, 229, 255, 0.45);
}

.modal-text-content {
    font-size: 0.95rem;
    color: var(--sys-text-muted);
    line-height: 1.8;
}

.modal-text-content p {
    margin-bottom: 14px;
}

.modal-text-content p:last-child {
    margin-bottom: 0;
}

.modal-text-content ul, .modal-text-content ol {
    margin: 12px 0 14px 20px;
}

.modal-text-content li {
    margin-bottom: 6px;
}

.modal-text-content strong {
    color: var(--sys-text-heading);
    font-weight: 700;
}

.modal-text-content a {
    color: var(--sys-cyan);
    text-decoration: underline;
}

/* Modal Footer */
.modal-footer {
    display: flex !important;
    align-items: center !important;
    justify-content: space-between !important;
    padding-top: 12px;
    margin-top: 8px;
    border-top: 1px solid var(--sys-border-subtle);
    font-size: 0.74rem;
    font-family: var(--font-mono);
    color: var(--sys-text-muted);
    background: transparent;
    flex-shrink: 0;
    width: 100% !important;
    box-sizing: border-box;
}

.modal-author {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-family: var(--font-mono);
    font-size: 0.74rem;
}

.modal-date {
    font-family: var(--font-mono);
    font-size: 0.74rem;
    letter-spacing: 0.4px;
    display: inline-flex;
    align-items: center;
    gap: 4px;
}

body[data-theme-mode="light"] .modal-container {
    background: #ffffff;
    border-color: rgba(2, 132, 199, 0.25);
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.12);
}

body[data-theme-mode="light"] .modal-header-card {
    background: linear-gradient(135deg, #f8fafc 0%, #f1f5f9 100%);
    border: 1px solid rgba(0, 0, 0, 0.08);
    border-left: 3.5px solid #0284c7;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
}

body[data-theme-mode="light"] .modal-header-card::after {
    background: radial-gradient(circle at 0% 0%, rgba(2, 132, 199, 0.08) 0%, transparent 75%);
}

body[data-theme-mode="light"] .modal-body-card {
    background: #f8fafc;
    border: 1px solid rgba(0, 0, 0, 0.08);
}

body[data-theme-mode="light"] .modal-text-content {
    color: #334155;
}

body[data-theme-mode="light"] .modal-footer {
    border-top-color: rgba(0, 0, 0, 0.08);
}

@media (max-width: 600px) {
    .modal-container {
        padding: 16px 14px;
        max-width: 95%;
    }

    .modal-header-card {
        padding: 12px 14px;
        margin-bottom: 10px;
    }

    .modal-title {
        font-size: 1.12rem;
    }

    .modal-body-card {
        padding: 16px 14px;
        max-height: 52vh;
    }
}

/* --- Main Footer with Controls Bar --- */
.sys-footer {
    position: relative;
    z-index: 10;
    background: var(--sys-bg-alt);
    border-top: 1px solid var(--sys-border);
    padding: 60px 0 30px;
}

.footer-container {
    max-width: var(--max-w);
    margin: 0 auto;
    padding: 0 24px;
}

.footer-top-row {
    display: grid;
    grid-template-columns: 1fr;
    gap: 40px;
}

@media (min-width: 600px) {
    .footer-top-row { grid-template-columns: repeat(2, 1fr); }
}

@media (min-width: 992px) {
    .footer-top-row { grid-template-columns: 2fr 1fr 1fr 1fr; }
}

.footer-slogan {
    font-size: 0.88rem;
    color: var(--sys-text-muted);
    margin-top: 14px;
    line-height: 1.6;
}

.footer-col-title {
    font-size: 0.88rem;
    font-weight: 700;
    color: var(--sys-text-heading);
    letter-spacing: 0.05em;
    margin-bottom: 16px;
}

.footer-link-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.footer-link-list a {
    font-size: 0.86rem;
    color: var(--sys-text-muted);
    transition: var(--transition);
}

.footer-link-list a:hover {
    color: var(--sys-cyan);
    padding-left: 4px;
}

/* Footer Operational Status, Controls & Copyright Bar (Matching Personal Site) */
.footer-bottom-bar {
    border-top: 1px solid var(--sys-border-subtle);
    padding-top: 24px;
    margin-top: 36px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 16px;
    font-family: var(--font-mono);
    font-size: 0.74rem;
    color: var(--sys-text-muted);
}

.footer-left {
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 600;
    font-family: var(--font-mono);
    font-size: 0.74rem;
    color: var(--sys-text);
    white-space: nowrap;
    flex-shrink: 0;
}

.status-dot {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: #10b981;
    box-shadow: 0 0 8px #10b981;
    animation: pulseBeacon 2s infinite ease-in-out;
}

@keyframes pulseBeacon {
    0%, 100% { transform: scale(1); opacity: 1; }
    50% { transform: scale(1.4); opacity: 0.4; }
}

.footer-center {
    display: flex;
    align-items: center;
    justify-content: center;
}

.footer-controls-row {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    flex-wrap: nowrap;
    justify-content: center;
    flex-shrink: 0;
}

/* Language Toggle */
.lang-toggle {
    display: inline-flex;
    align-items: center;
    background: var(--sys-surface);
    border: 1px solid var(--sys-border-subtle);
    border-radius: var(--radius-pill);
    padding: 2px;
}

.lang-btn {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    background: transparent;
    border: none;
    color: var(--sys-text-muted);
    font-family: var(--font-mono);
    font-size: 0.7rem;
    font-weight: 700;
    padding: 4px 8px;
    border-radius: var(--radius-pill);
    cursor: pointer;
    transition: all var(--transition-fast, 0.2s cubic-bezier(0.16, 1, 0.3, 1));
}

.lang-btn .lang-flag {
    width: 15px;
    height: 10px;
    border-radius: 2px;
    box-shadow: 0 0 0 1px rgba(255, 255, 255, 0.16);
    flex-shrink: 0;
    transition: transform var(--transition-fast, 0.2s cubic-bezier(0.16, 1, 0.3, 1));
}

.lang-btn:hover .lang-flag {
    transform: scale(1.12);
}

.lang-btn.active {
    background: var(--sys-cyan-dim);
    color: var(--sys-cyan);
    box-shadow: 0 0 10px var(--sys-cyan-glow);
}

.lang-btn:hover:not(.active) {
    color: var(--sys-text);
}

/* Theme Toggle */
.theme-toggle {
    display: inline-flex;
    align-items: center;
    background: var(--sys-surface);
    border: 1px solid var(--sys-border-subtle);
    border-radius: var(--radius-pill);
    padding: 2px;
}

.theme-mode-btn {
    background: transparent;
    border: none;
    color: var(--sys-text-muted);
    font-family: var(--font-mono);
    font-size: 0.7rem;
    font-weight: 700;
    padding: 4px 8px;
    border-radius: var(--radius-pill);
    cursor: pointer;
    transition: all var(--transition-fast, 0.2s cubic-bezier(0.16, 1, 0.3, 1));
}

.theme-mode-btn.active {
    background: var(--sys-cyan-dim);
    color: var(--sys-cyan);
    box-shadow: 0 0 10px var(--sys-cyan-glow);
}

.theme-mode-btn:hover:not(.active) {
    color: var(--sys-text);
}

.footer-right {
    font-family: var(--font-mono);
    font-size: 0.74rem;
    color: var(--sys-text-dim);
    white-space: nowrap;
    flex-shrink: 0;
}

@media (max-width: 768px) {
    .footer-bottom-bar {
        flex-direction: column;
        justify-content: center;
        text-align: center;
        gap: 14px;
    }
    .footer-left,
    .footer-center,
    .footer-right {
        justify-content: center;
        text-align: center;
    }
}

/* Light Mode Overrides */
body[data-theme-mode="light"] .lang-toggle,
body[data-theme-mode="light"] .theme-toggle {
    background: rgba(255, 255, 255, 0.9);
    border-color: rgba(0, 0, 0, 0.10);
}

body[data-theme-mode="light"] .lang-btn,
body[data-theme-mode="light"] .theme-mode-btn {
    color: #64748b;
}

body[data-theme-mode="light"] .lang-btn.active,
body[data-theme-mode="light"] .theme-mode-btn.active {
    background: rgba(2, 132, 199, 0.15);
    color: #0284c7;
    box-shadow: 0 1px 4px rgba(0, 0, 0, 0.08);
}

body[data-theme-mode="light"] .lang-btn:hover:not(.active),
body[data-theme-mode="light"] .theme-mode-btn:hover:not(.active) {
    color: #1e293b;
}

body[data-theme-mode="light"] .footer-right {
    color: #94a3b8;
}

body[data-theme-mode="light"] .footer-left {
    color: #334155;
}

/* --- Scroll Reveal Animations --- */
[data-reveal] {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.6s cubic-bezier(0.16, 1, 0.3, 1), transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

[data-reveal].revealed {
    opacity: 1;
    transform: translateY(0);
}

/* --- Floating Back to Top Button --- */
.back-to-top-btn {
    position: fixed;
    bottom: 28px;
    right: 28px;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: var(--sys-surface-solid);
    border: 1.5px solid var(--sys-border);
    color: var(--sys-cyan);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    z-index: 900;
    opacity: 0;
    visibility: hidden;
    transform: translateY(14px) scale(0.9);
    transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.55), 0 0 16px var(--sys-cyan-glow);
}

.back-to-top-btn.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0) scale(1);
}

.back-to-top-btn:hover {
    background: linear-gradient(135deg, var(--sys-cyan) 0%, var(--sys-blue) 100%);
    border-color: var(--sys-cyan);
    color: #050b14;
    box-shadow: 0 0 24px rgba(0, 229, 255, 0.5);
    transform: translateY(-3px) scale(1.06);
}

body[data-theme-mode="light"] .back-to-top-btn {
    background: #ffffff;
    border-color: rgba(2, 132, 199, 0.3);
    color: #0284c7;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.08), 0 0 12px rgba(2, 132, 199, 0.2);
}

body[data-theme-mode="light"] .back-to-top-btn:hover {
    background: linear-gradient(135deg, #0284c7 0%, #0369a1 100%);
    color: #ffffff;
}