/* ==========================================================================
   Entangl Quantum Scientific & Techno Design System
   Matches Android App Color Palette, HUD Geometry & Hardware Theme
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&family=JetBrains+Mono:wght@400;500;600;700&display=swap');

:root {
    /* 1. Android App Foundation Colors (Color.kt) */
    --void-bg: #050508;              /* OLED-black void foundation */
    --deep-space: #09090F;           /* Secondary dark surface */
    --dark-matter: #12121A;          /* Surface cards */
    --dark-matter-variant: #1A1A2E;  /* Elevated surface / container */
    --particle-border: #222238;      /* Default boundary stroke */
    --particle-border-glow: rgba(0, 240, 255, 0.2);

    /* 2. Quantum Accents & Reticle Colors */
    --quantum-cyan: #00F0FF;          /* Radioactive cyan - primary */
    --quantum-cyan-variant: #00B4D8;
    --quantum-cyan-glow: rgba(0, 240, 255, 0.45);
    
    --quantum-green: #00FF9D;         /* Atomic neon green - target locked/verified */
    --quantum-green-glow: rgba(0, 255, 157, 0.45);

    --isotope-magenta: #FF003C;       /* Laser magenta / security alert */
    --cyber-rose: #FF007F;            /* Cyber neon rose */
    --singularity-purple: #9D00FF;    /* Singularity purple */
    --electric-amber: #FFE600;        /* Electric amber */
    --deep-photon: #00A3FF;           /* Deep photon blue */
    --plasma-violet: #7000FF;         /* Plasma violet */

    /* 3. Readout Typography Colors */
    --neutron-white: #E0E5EC;         /* Crisp readout text */
    --subatomic-gray: #6B7280;        /* Technical secondary labels */
    --subatomic-gray-light: #9CA3AF;
    --text-muted: #8892B0;

    /* 4. Active Theme Dynamic Accent (Interactive Cyber Switcher) */
    --active-accent: var(--quantum-cyan);
    --active-accent-glow: var(--quantum-cyan-glow);

    /* 5. Typography Tokens (Type.kt) */
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-mono: 'JetBrains Mono', 'Space Mono', Consolas, monospace;

    /* 6. Spacing & Radii */
    --space-2xs: 4px;
    --space-xs: 8px;
    --space-sm: 12px;
    --space-md: 16px;
    --space-lg: 24px;
    --space-xl: 36px;
    --space-2xl: 48px;
    --space-3xl: 72px;

    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-pill: 9999px;

    /* 7. Elevation & Shadows */
    --shadow-subtle: 0 4px 20px rgba(0, 0, 0, 0.6);
    --shadow-glow-cyan: 0 0 25px rgba(0, 240, 255, 0.25);
    --shadow-glow-green: 0 0 25px rgba(0, 255, 157, 0.3);
    --shadow-glow-active: 0 0 25px var(--active-accent-glow);
}

/* ==========================================================================
   Base & Reset
   ========================================================================== */

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

html {
    scroll-behavior: smooth;
    color-scheme: dark;
}

body {
    font-family: var(--font-sans);
    background-color: var(--void-bg);
    color: var(--neutron-white);
    line-height: 1.65;
    overflow-x: hidden;
    position: relative;
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Background Cyber Grid & Atmospheric Glows */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: 
        radial-gradient(circle at 50% 10%, rgba(0, 240, 255, 0.07) 0%, transparent 60%),
        radial-gradient(circle at 90% 70%, rgba(255, 0, 60, 0.04) 0%, transparent 50%),
        linear-gradient(rgba(255, 255, 255, 0.02) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.02) 1px, transparent 1px);
    background-size: 100% 100%, 100% 100%, 48px 48px, 48px 48px;
    background-repeat: no-repeat, no-repeat, repeat, repeat;
    pointer-events: none;
    z-index: -2;
}

/* Subtle particle glow orb */
.ambient-glow {
    position: absolute;
    border-radius: 50%;
    filter: blur(120px);
    pointer-events: none;
    z-index: -1;
    opacity: 0.4;
    transition: background 0.8s ease;
}

.ambient-glow-1 {
    top: 100px;
    left: 20%;
    width: 400px;
    height: 400px;
    background: var(--active-accent-glow);
}

.ambient-glow-2 {
    top: 60%;
    right: 10%;
    width: 450px;
    height: 450px;
    background: rgba(255, 0, 127, 0.15);
}

/* ==========================================================================
   Typography & Technical Badges
   ========================================================================== */

h1, h2, h3, h4, h5, h6 {
    color: var(--neutron-white);
    font-weight: 700;
    line-height: 1.2;
    letter-spacing: -0.02em;
}

h1 {
    font-size: clamp(2.4rem, 5vw, 4.2rem);
    line-height: 1.1;
    margin-bottom: var(--space-md);
}

h2 {
    font-size: clamp(1.8rem, 3.5vw, 2.75rem);
    margin-bottom: var(--space-lg);
}

h3 {
    font-size: clamp(1.3rem, 2.5vw, 1.75rem);
    margin-bottom: var(--space-md);
}

p {
    color: var(--text-muted);
    font-size: 1.05rem;
    margin-bottom: var(--space-md);
}

p.lead {
    font-size: 1.25rem;
    color: var(--neutron-white);
    max-width: 720px;
}

a {
    color: var(--active-accent);
    text-decoration: none;
    transition: all 0.25s ease;
}

a:hover {
    color: var(--quantum-green);
    text-shadow: 0 0 10px rgba(0, 255, 157, 0.4);
}

.mono {
    font-family: var(--font-mono);
}

code {
    font-family: var(--font-mono);
    font-size: 0.88em;
    padding: 2px 6px;
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: var(--radius-sm);
    color: var(--active-accent);
    word-break: break-word;
}

pre code {
    padding: 0;
    background: transparent;
    border: none;
    font-size: inherit;
    color: inherit;
    word-break: normal;
}

.gradient-text {
    background: linear-gradient(135deg, var(--active-accent) 0%, #00FF9D 60%, var(--cyber-rose) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* Open Source & Status Badges */
.badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    padding: 4px 10px;
    border-radius: var(--radius-pill);
    background: rgba(18, 18, 26, 0.85);
    border: 1px solid var(--particle-border);
    color: var(--neutron-white);
    width: fit-content;
}

.badge-cyan {
    border-color: rgba(0, 240, 255, 0.4);
    color: var(--quantum-cyan);
    box-shadow: 0 0 10px rgba(0, 240, 255, 0.15);
}

.badge-green {
    border-color: rgba(0, 255, 157, 0.4);
    color: var(--quantum-green);
    box-shadow: 0 0 10px rgba(0, 255, 157, 0.15);
}

.badge-magenta {
    border-color: rgba(255, 0, 60, 0.4);
    color: var(--isotope-magenta);
    box-shadow: 0 0 10px rgba(255, 0, 60, 0.15);
}

.pulse-dot {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background-color: var(--quantum-green);
    box-shadow: 0 0 8px var(--quantum-green);
    animation: pulseGlow 2s infinite;
}

@keyframes pulseGlow {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.4; transform: scale(0.85); }
}

/* ==========================================================================
   Layout Containers
   ========================================================================== */

.container {
    width: 100%;
    max-width: 1240px;
    margin: 0 auto;
    padding: 0 var(--space-lg);
}

.container-narrow {
    max-width: 900px;
}

.section {
    padding: var(--space-3xl) 0;
    position: relative;
}

/* ==========================================================================
   Telemetry HUD Bar & Main Navigation
   ========================================================================== */

.telemetry-bar {
    background: rgba(5, 5, 8, 0.95);
    border-bottom: 1px solid var(--particle-border);
    font-family: var(--font-mono);
    font-size: 0.72rem;
    padding: 5px 0;
    color: var(--subatomic-gray);
    overflow: hidden;
    position: relative;
    z-index: 101;
}

.telemetry-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    white-space: nowrap;
    gap: var(--space-md);
}

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

.navbar {
    position: sticky;
    top: 0;
    background: rgba(9, 9, 15, 0.85);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
    z-index: 100;
    transition: border-color 0.3s ease;
}

.navbar-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 72px;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-weight: 800;
    font-size: 1.35rem;
    color: var(--neutron-white);
    letter-spacing: -0.01em;
}

.nav-brand:hover {
    color: var(--active-accent);
    text-shadow: 0 0 12px var(--active-accent-glow);
}

.nav-brand img {
    width: 36px;
    height: 36px;
    border-radius: var(--radius-sm);
    box-shadow: 0 0 12px rgba(0, 240, 255, 0.3);
    transition: transform 0.3s ease;
}

.nav-brand:hover img {
    transform: rotate(5deg) scale(1.05);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: var(--space-lg);
}

.nav-link {
    color: var(--neutron-white);
    font-size: 0.95rem;
    font-weight: 500;
    position: relative;
    padding: 6px 0;
    transition: color 0.25s ease;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0%;
    height: 2px;
    background: var(--active-accent);
    box-shadow: 0 0 8px var(--active-accent-glow);
    transition: width 0.25s ease;
}

.nav-link:hover {
    color: var(--active-accent);
}

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

.nav-link.active {
    color: var(--active-accent);
}

/* Nav Actions (GitHub Pill & Star Count) */
.nav-actions {
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

.github-pill {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 7px 14px;
    background: var(--dark-matter);
    border: 1px solid var(--particle-border);
    border-radius: var(--radius-pill);
    color: var(--neutron-white);
    font-family: var(--font-mono);
    font-size: 0.82rem;
    transition: all 0.25s ease;
}

.github-pill:hover {
    border-color: var(--active-accent);
    box-shadow: 0 0 15px rgba(0, 240, 255, 0.2);
    color: var(--neutron-white);
    transform: translateY(-1px);
}

.github-pill svg {
    fill: currentColor;
}

.star-count {
    color: var(--active-accent);
    font-weight: 700;
    border-left: 1px solid var(--particle-border);
    padding-left: 8px;
}

/* Mobile Nav Toggle */
.nav-toggle {
    display: none;
    background: transparent;
    border: 1px solid var(--particle-border);
    border-radius: var(--radius-sm);
    color: var(--neutron-white);
    padding: 8px;
    cursor: pointer;
}

.mobile-menu {
    display: none;
}

/* ==========================================================================
   Buttons & CTAs
   ========================================================================== */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 13px 26px;
    border-radius: var(--radius-pill);
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    border: 1.5px solid transparent;
    text-align: center;
    text-decoration: none;
    position: relative;
    user-select: none;
}

.btn svg {
    flex-shrink: 0;
}

.btn-primary {
    background: var(--active-accent);
    color: var(--void-bg);
    box-shadow: 0 0 18px var(--active-accent-glow);
    font-weight: 700;
}

.btn-primary:hover {
    background: transparent;
    color: var(--active-accent);
    border-color: var(--active-accent);
    box-shadow: 0 0 28px var(--active-accent-glow);
    transform: translateY(-2px);
}

.btn-secondary {
    background: rgba(18, 18, 26, 0.8);
    color: var(--neutron-white);
    border-color: var(--particle-border);
    backdrop-filter: blur(8px);
}

.btn-secondary:hover {
    border-color: var(--active-accent);
    color: var(--active-accent);
    box-shadow: 0 0 20px rgba(0, 240, 255, 0.2);
    transform: translateY(-2px);
}

.btn-accent {
    background: transparent;
    color: var(--quantum-green);
    border-color: var(--quantum-green);
    box-shadow: 0 0 14px var(--quantum-green-glow);
}

.btn-accent:hover {
    background: var(--quantum-green);
    color: var(--void-bg);
    box-shadow: 0 0 28px var(--quantum-green-glow);
    transform: translateY(-2px);
}

.btn-sm {
    padding: 8px 16px;
    font-size: 0.85rem;
}

.btn-mono {
    font-family: var(--font-mono);
}

.btn-group {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    flex-wrap: wrap;
}

/* Play Store Image Icon */
.playstore-icon {
    width: 20px;
    height: 20px;
    object-fit: contain;
    vertical-align: middle;
    filter: brightness(0);
    transition: all 0.25s ease;
}

.btn-primary:hover .playstore-icon {
    filter: invert(1);
}

.btn-secondary .playstore-icon {
    filter: invert(1);
}

.playstore-card-icon {
    width: 26px;
    height: 26px;
    object-fit: contain;
    filter: invert(1);
    vertical-align: middle;
    transition: filter 0.25s ease;
}

.download-card:hover .playstore-card-icon {
    filter: invert(72%) sepia(90%) saturate(1500%) hue-rotate(150deg) brightness(105%) contrast(105%);
}

/* ==========================================================================
   Prominent Store & Sideload Download Action Buttons
   ========================================================================== */

.btn-store {
    display: inline-flex;
    align-items: center;
    gap: 14px;
    padding: 12px 24px;
    border-radius: var(--radius-md);
    background: var(--dark-matter);
    border: 1.5px solid var(--particle-border);
    color: var(--neutron-white);
    text-decoration: none;
    transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 4px 18px rgba(0, 0, 0, 0.5);
    min-height: 56px;
    text-align: left;
    position: relative;
    overflow: hidden;
    cursor: pointer;
}

.btn-store::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.06), transparent 70%);
    pointer-events: none;
}

.btn-store-play {
    border-color: var(--active-accent);
    background: linear-gradient(180deg, #161b2e 0%, #0d111d 100%);
    box-shadow: 0 0 24px var(--active-accent-glow), 0 4px 18px rgba(0, 0, 0, 0.7);
}

.btn-store-play:hover {
    transform: translateY(-2px);
    border-color: #ffffff;
    box-shadow: 0 0 35px var(--active-accent-glow), 0 8px 25px rgba(0, 0, 0, 0.85);
    color: var(--neutron-white);
}

.btn-store-apk {
    border-color: rgba(0, 255, 157, 0.5);
    background: linear-gradient(180deg, #112022 0%, #0b1517 100%);
    box-shadow: 0 0 18px rgba(0, 255, 157, 0.2), 0 4px 18px rgba(0, 0, 0, 0.7);
}

.btn-store-apk:hover {
    transform: translateY(-2px);
    border-color: var(--quantum-green);
    box-shadow: 0 0 30px var(--quantum-green-glow), 0 8px 25px rgba(0, 0, 0, 0.85);
    color: var(--neutron-white);
}

.btn-store-icon {
    width: 28px;
    height: 28px;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
}

.btn-store-icon img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    filter: invert(1);
    transition: transform 0.25s ease;
}

.btn-store:hover .btn-store-icon img,
.btn-store:hover .btn-store-icon svg {
    transform: scale(1.1);
}

.btn-store-text {
    display: flex;
    flex-direction: column;
    line-height: 1.15;
}

.btn-store-sub {
    font-size: 0.65rem;
    font-family: var(--font-mono);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--subatomic-gray);
    margin-bottom: 3px;
    font-weight: 600;
}

.btn-store-title {
    font-size: 1.1rem;
    font-weight: 700;
    letter-spacing: -0.01em;
    color: var(--neutron-white);
}

/* Trust Signals / Credibility Row */
.trust-signals-row {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-top: 14px;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--subatomic-gray);
    flex-wrap: wrap;
}

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

.trust-item svg {
    color: var(--quantum-green);
}

/* Mobile Floating Download Bar (Appears on Mobile) */
.mobile-floating-bar {
    display: none;
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
    background: rgba(9, 9, 15, 0.94);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-top: 1px solid var(--particle-border);
    padding: 10px 16px;
    padding-bottom: calc(10px + env(safe-area-inset-bottom, 0px));
    z-index: 999;
    box-shadow: 0 -4px 20px rgba(0, 0, 0, 0.8);
}

.mobile-floating-inner {
    display: flex;
    gap: 10px;
    align-items: center;
    max-width: 500px;
    margin: 0 auto;
}

.mobile-floating-inner .btn {
    flex: 1;
    min-height: 44px;
    padding: 10px 14px;
    font-size: 0.85rem;
    gap: 8px;
    white-space: nowrap;
}

/* ==========================================================================
   Hero Section & Quantum Scanner Overlay (Ported from Android App)
   ========================================================================== */

.hero {
    min-height: calc(100vh - 110px);
    display: flex;
    align-items: center;
    padding: var(--space-3xl) 0 var(--space-2xl);
    position: relative;
}

.hero-grid {
    display: grid;
    grid-template-columns: 1.15fr 0.85fr;
    gap: var(--space-2xl);
    align-items: center;
}

.hero-content {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.hero-header-tag {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: var(--space-xs);
}

.hero-title {
    font-size: clamp(2.5rem, 5.5vw, 4.4rem);
    font-weight: 800;
    line-height: 1.08;
    letter-spacing: -0.03em;
}

.hero-description {
    font-size: 1.15rem;
    color: var(--text-muted);
    max-width: 620px;
    margin-bottom: var(--space-md);
}

.hero-features-list {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm) var(--space-lg);
    margin-bottom: var(--space-lg);
}

.hero-feat-item {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 0.9rem;
    font-family: var(--font-mono);
    color: var(--neutron-white);
}

.hero-feat-item svg {
    color: var(--quantum-green);
}

/* Live Project Metrics Ribbon */
.metrics-ribbon {
    display: flex;
    align-items: center;
    justify-content: space-around;
    background: var(--dark-matter);
    border: 1px solid var(--particle-border);
    border-radius: var(--radius-lg);
    padding: var(--space-md) var(--space-lg);
    margin-top: var(--space-lg);
    gap: var(--space-md);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.4);
}

.metric-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2px;
    text-align: center;
}

.metric-value {
    font-family: var(--font-mono);
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--active-accent);
}

.metric-label {
    font-size: 0.75rem;
    font-family: var(--font-mono);
    color: var(--subatomic-gray);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.metric-divider {
    width: 1px;
    height: 36px;
    background: var(--particle-border);
}

@media (max-width: 600px) {
    .metrics-ribbon {
        flex-direction: column;
        gap: var(--space-md);
    }
    .metric-divider {
        width: 100%;
        height: 1px;
    }
}

/* Quantum Scanner Interactive Widget */
.scanner-hud-card {
    background: var(--dark-matter);
    border: 1px solid var(--particle-border);
    border-radius: var(--radius-xl);
    padding: var(--space-lg);
    box-shadow: var(--shadow-subtle), 0 0 35px rgba(0, 0, 0, 0.8);
    position: relative;
    overflow: hidden;
}

.hud-card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-md);
    padding-bottom: var(--space-sm);
    border-bottom: 1px solid var(--particle-border);
    font-family: var(--font-mono);
    font-size: 0.78rem;
}

.hud-tag {
    color: var(--subatomic-gray);
}

.hud-status-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: var(--active-accent);
}

/* The Viewfinder Box with 4 Brackets & Sweeping Laser (QuantumScannerOverlay.kt) */
.quantum-viewfinder {
    position: relative;
    width: 100%;
    aspect-ratio: 1 / 1;
    max-width: 380px;
    margin: 0 auto;
    background: #000000;
    border-radius: var(--radius-md);
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid rgba(0, 240, 255, 0.2);
    transition: border-color 0.4s ease;
}

.quantum-viewfinder.target-locked {
    border-color: var(--quantum-green);
    box-shadow: 0 0 25px rgba(0, 255, 157, 0.25);
}

/* QR Pattern representation */
.qr-matrix-preview {
    width: 65%;
    height: 65%;
    position: relative;
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 4px;
    padding: 12px;
    background: rgba(18, 18, 26, 0.8);
    border-radius: var(--radius-sm);
    opacity: 0.75;
    transition: opacity 0.3s ease;
}

.qr-cell {
    background: var(--neutron-white);
    border-radius: 2px;
    transition: background 0.4s ease;
}

.qr-cell.dim {
    opacity: 0.15;
}

.target-locked .qr-cell {
    background: var(--quantum-green);
}

/* 4 HUD Brackets - 32px length, 3.5px stroke from Compose code */
.bracket {
    position: absolute;
    width: 32px;
    height: 32px;
    pointer-events: none;
    transition: border-color 0.4s ease;
}

.bracket-tl {
    top: 16px;
    left: 16px;
    border-top: 3.5px solid var(--active-accent);
    border-left: 3.5px solid var(--active-accent);
}

.bracket-tr {
    top: 16px;
    right: 16px;
    border-top: 3.5px solid var(--active-accent);
    border-right: 3.5px solid var(--active-accent);
}

.bracket-bl {
    bottom: 16px;
    left: 16px;
    border-bottom: 3.5px solid var(--active-accent);
    border-left: 3.5px solid var(--active-accent);
}

.bracket-br {
    bottom: 16px;
    right: 16px;
    border-bottom: 3.5px solid var(--active-accent);
    border-right: 3.5px solid var(--active-accent);
}

.target-locked .bracket {
    border-color: var(--quantum-green) !important;
}

/* Sweeping Animated Laser (Exact Compose replica) */
.laser-line {
    position: absolute;
    left: 16px;
    right: 16px;
    height: 3px;
    background: linear-gradient(90deg, 
        transparent 0%, 
        var(--active-accent) 20%, 
        var(--active-accent) 80%, 
        transparent 100%
    );
    box-shadow: 0 0 15px var(--active-accent-glow);
    animation: sweepLaser 2.4s cubic-bezier(0.4, 0, 0.2, 1) infinite alternate;
    pointer-events: none;
    z-index: 5;
    transition: background 0.4s ease, box-shadow 0.4s ease;
}

/* Laser Aura (14dp aura from Compose) */
.laser-line::before {
    content: '';
    position: absolute;
    top: -14px;
    left: 0;
    right: 0;
    height: 31px;
    background: linear-gradient(180deg, 
        transparent 0%, 
        var(--active-accent-glow) 50%, 
        transparent 100%
    );
    pointer-events: none;
}

.target-locked .laser-line {
    background: linear-gradient(90deg, transparent 0%, var(--quantum-green) 20%, var(--quantum-green) 80%, transparent 100%);
    box-shadow: 0 0 15px var(--quantum-green-glow);
    animation-play-state: paused;
    top: 50% !important;
}

.target-locked .laser-line::before {
    background: linear-gradient(180deg, transparent 0%, var(--quantum-green-glow) 50%, transparent 100%);
}

@keyframes sweepLaser {
    0% {
        top: 20px;
    }
    100% {
        top: calc(100% - 24px);
    }
}

/* Scanner HUD Controls & Status Readout */
.scanner-hud-footer {
    margin-top: var(--space-md);
    text-align: center;
}

.hud-instruction {
    font-family: var(--font-mono);
    font-weight: 700;
    font-size: 0.85rem;
    letter-spacing: 0.05em;
    color: var(--active-accent);
    margin-bottom: 2px;
    transition: color 0.4s ease;
}

.target-locked .hud-instruction {
    color: var(--quantum-green);
}

.hud-subinstruction {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--subatomic-gray);
    margin-bottom: var(--space-md);
}

.scanner-toggle-btn {
    width: 100%;
    font-family: var(--font-mono);
}

/* ==========================================================================
   Android Cyber Color Picker Simulation (CyberColorPicker.kt)
   ========================================================================== */

.cyber-picker-section {
    background: var(--deep-space);
    border-top: 1px solid var(--particle-border);
    border-bottom: 1px solid var(--particle-border);
    padding: var(--space-2xl) 0;
}

.picker-card {
    background: var(--dark-matter);
    border: 1px solid var(--particle-border);
    border-radius: var(--radius-xl);
    padding: var(--space-xl);
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-xl);
    align-items: center;
}

.swatches-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 12px;
    margin-top: var(--space-md);
}

.swatch-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
    background: var(--dark-matter-variant);
    border: 1px solid var(--particle-border);
    border-radius: var(--radius-md);
    padding: 10px 8px;
    cursor: pointer;
    transition: all 0.25s ease;
    outline: none;
}

.swatch-btn:hover,
.swatch-btn.active {
    border-color: var(--swatch-color);
    box-shadow: 0 0 16px var(--swatch-glow);
    transform: translateY(-2px);
}

.swatch-circle {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background-color: var(--swatch-color);
    box-shadow: 0 0 10px var(--swatch-glow);
    transition: transform 0.25s ease;
}

.swatch-btn:hover .swatch-circle,
.swatch-btn.active .swatch-circle {
    transform: scale(1.15);
}

.swatch-label {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    color: var(--neutron-white);
    text-align: center;
}

.swatch-hex {
    font-family: var(--font-mono);
    font-size: 0.65rem;
    color: var(--subatomic-gray);
}

/* Node Identity Preview Card (Simulates In-App Profile Screen) */
.node-preview-box {
    background: #000000;
    border: 1.5px solid var(--active-accent);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    box-shadow: 0 0 30px var(--active-accent-glow);
    transition: all 0.4s ease;
    position: relative;
    overflow: hidden;
}

.node-preview-box::before {
    content: 'HARDWARE KEYSTORE BOUND';
    position: absolute;
    top: 8px;
    right: 12px;
    font-family: var(--font-mono);
    font-size: 0.65rem;
    letter-spacing: 0.08em;
    color: var(--active-accent);
    opacity: 0.8;
}

.node-avatar {
    width: 64px;
    height: 64px;
    border-radius: 50%;
    border: 2px solid var(--active-accent);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.6rem;
    font-weight: 800;
    color: var(--void-bg);
    background-color: var(--active-accent);
    box-shadow: 0 0 20px var(--active-accent-glow);
    margin-bottom: var(--space-md);
    transition: all 0.3s ease;
}

.node-codename {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--neutron-white);
    margin-bottom: 2px;
}

.node-signature {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--subatomic-gray);
    word-break: break-all;
    background: var(--dark-matter);
    padding: 8px 12px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--particle-border);
    margin-top: var(--space-sm);
}

/* ==========================================================================
   Features Grid & Architecture Cards
   ========================================================================== */

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--space-lg);
    margin-top: var(--space-xl);
}

.feature-card {
    background: var(--dark-matter);
    border: 1px solid var(--particle-border);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: linear-gradient(90deg, transparent, var(--active-accent), transparent);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-6px);
    border-color: rgba(0, 240, 255, 0.3);
    box-shadow: var(--shadow-subtle), 0 0 25px rgba(0, 240, 255, 0.12);
}

.feature-card:hover::before {
    opacity: 1;
}

.feature-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--space-md);
}

.feature-icon-wrapper {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-md);
    background: var(--dark-matter-variant);
    border: 1px solid var(--particle-border);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--active-accent);
    transition: all 0.3s ease;
}

.feature-card:hover .feature-icon-wrapper {
    border-color: var(--active-accent);
    box-shadow: 0 0 16px var(--active-accent-glow);
}

.feature-number {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--subatomic-gray);
    font-weight: 600;
}

/* ==========================================================================
   Interactive Protocol Wire Inspector
   ========================================================================== */

.protocol-inspector {
    background: var(--dark-matter);
    border: 1px solid var(--particle-border);
    border-radius: var(--radius-xl);
    overflow: hidden;
    margin-top: var(--space-xl);
}

.inspector-tabs {
    display: flex;
    background: var(--void-bg);
    border-bottom: 1px solid var(--particle-border);
    overflow-x: auto;
}

.inspector-tab {
    padding: 14px 22px;
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--subatomic-gray);
    background: transparent;
    border: none;
    border-bottom: 2px solid transparent;
    cursor: pointer;
    white-space: nowrap;
    transition: all 0.2s ease;
}

.inspector-tab:hover {
    color: var(--neutron-white);
}

.inspector-tab.active {
    color: var(--active-accent);
    border-bottom-color: var(--active-accent);
    background: rgba(18, 18, 26, 0.5);
}

.inspector-body {
    padding: var(--space-xl);
}

.terminal-window {
    background: #000000;
    border: 1px solid var(--particle-border);
    border-radius: var(--radius-md);
    font-family: var(--font-mono);
    font-size: 0.85rem;
    overflow-x: auto;
}

.terminal-header {
    background: #0d0d14;
    padding: 8px 16px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-bottom: 1px solid var(--particle-border);
    color: var(--subatomic-gray);
    font-size: 0.75rem;
}

.terminal-dots {
    display: flex;
    gap: 6px;
}

.terminal-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--particle-border);
}

.terminal-dot.red { background: #FF5F56; }
.terminal-dot.yellow { background: #FFBD2E; }
.terminal-dot.green { background: #27C93F; }

.terminal-code {
    padding: var(--space-md);
    color: #A6ACCD;
    line-height: 1.7;
    margin: 0;
}

.terminal-code .kw { color: #FF007F; font-weight: 600; }
.terminal-code .str { color: #00FF9D; }
.terminal-code .num { color: #FFE600; }
.terminal-code .fn { color: #00F0FF; }
.terminal-code .cmt { color: #5C6370; font-style: italic; }

/* ==========================================================================
   Open Source Download & Verification Matrix
   ========================================================================== */

.download-section {
    padding: var(--space-3xl) 0;
    text-align: center;
}

.download-cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--space-lg);
    margin: var(--space-xl) 0;
    text-align: left;
}

.download-card {
    background: var(--dark-matter);
    border: 1px solid var(--particle-border);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    transition: all 0.3s ease;
}

.download-card.featured {
    border-color: var(--active-accent);
    box-shadow: 0 0 25px var(--active-accent-glow);
}

.download-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-subtle), 0 0 20px rgba(0, 240, 255, 0.15);
}

.download-card-title {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: var(--space-xs);
    display: flex;
    align-items: center;
    gap: 8px;
}

.download-card-meta {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--subatomic-gray);
    margin-bottom: var(--space-md);
}

/* SHA-256 Checksum Drawer */
.checksum-box {
    background: #000000;
    border: 1px solid var(--particle-border);
    border-radius: var(--radius-md);
    padding: var(--space-md);
    margin-top: var(--space-lg);
    font-family: var(--font-mono);
    font-size: 0.8rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-md);
    word-break: break-all;
}

.checksum-val {
    color: var(--quantum-green);
}

.copy-btn {
    background: var(--dark-matter-variant);
    border: 1px solid var(--particle-border);
    color: var(--neutron-white);
    padding: 6px 12px;
    border-radius: var(--radius-sm);
    font-family: var(--font-mono);
    font-size: 0.75rem;
    cursor: pointer;
    flex-shrink: 0;
    transition: all 0.2s ease;
}

.copy-btn:hover {
    border-color: var(--active-accent);
    color: var(--active-accent);
}

/* ==========================================================================
   Documentation & Markdown Article Styles
   ========================================================================== */

.page-hero {
    padding: var(--space-3xl) 0 var(--space-xl);
    border-bottom: 1px solid var(--particle-border);
    margin-bottom: var(--space-2xl);
    background: linear-gradient(180deg, rgba(18, 18, 26, 0.4) 0%, transparent 100%);
}

.doc-hero-badge-row {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
    margin-bottom: var(--space-sm);
}

.doc-header-showcase {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-xl);
}

.doc-header-text {
    flex: 1;
}

.doc-header-media {
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 16px;
    background: radial-gradient(circle, rgba(0, 240, 255, 0.12) 0%, rgba(18, 18, 26, 0.8) 70%, transparent 100%);
    border: 1px solid var(--particle-border);
    border-radius: var(--radius-xl);
    box-shadow: 0 0 30px rgba(0, 240, 255, 0.15);
}

.doc-hero-image {
    width: 120px;
    height: 120px;
    object-fit: contain;
    filter: drop-shadow(0 0 16px rgba(0, 240, 255, 0.4));
    transition: transform 0.3s ease;
}

.doc-header-media:hover .doc-hero-image {
    transform: scale(1.06) rotate(3deg);
}

.doc-header-meta {
    display: flex;
    align-items: center;
    gap: 12px;
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--subatomic-gray);
    margin-top: var(--space-md);
    flex-wrap: wrap;
}

.doc-header-meta strong {
    color: var(--neutron-white);
}

.doc-layout {
    display: grid;
    grid-template-columns: 260px 1fr;
    gap: var(--space-2xl);
    align-items: start;
}

.doc-sidebar {
    position: sticky;
    top: 100px;
    background: var(--dark-matter);
    border: 1px solid var(--particle-border);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
}

.doc-nav-group {
    margin-bottom: var(--space-md);
}

.doc-nav-heading {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--subatomic-gray);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-bottom: var(--space-xs);
}

.doc-nav-links {
    list-style: none;
    margin: 0;
    padding: 0;
}

.doc-nav-links li {
    margin-bottom: 6px;
}

.doc-nav-links a {
    color: var(--text-muted);
    font-size: 0.9rem;
    display: block;
    padding: 4px 8px;
    border-radius: var(--radius-sm);
    transition: all 0.2s ease;
}

.doc-nav-links a:hover,
.doc-nav-links a.active {
    color: var(--active-accent);
    background: var(--dark-matter-variant);
}

.doc-content {
    background: var(--dark-matter);
    border: 1px solid var(--particle-border);
    border-radius: var(--radius-xl);
    padding: var(--space-2xl);
}

.doc-content h2 {
    color: var(--active-accent);
    border-bottom: 1px solid var(--particle-border);
    padding-bottom: var(--space-sm);
    margin-top: var(--space-2xl);
}

.doc-content h2:first-child {
    margin-top: 0;
}

.doc-content h3 {
    color: var(--quantum-green);
    margin-top: var(--space-xl);
}

.doc-content ul, .doc-content ol {
    margin-left: var(--space-xl);
    margin-bottom: var(--space-lg);
    color: var(--text-muted);
}

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

.doc-diagram-container {
    background: #000000;
    border: 1px solid var(--particle-border);
    border-radius: var(--radius-lg);
    padding: var(--space-md);
    margin: var(--space-lg) 0;
    text-align: center;
}

.doc-diagram-container img {
    max-width: 100%;
    height: auto;
    border-radius: var(--radius-sm);
    box-shadow: 0 0 20px rgba(0, 240, 255, 0.1);
}

.doc-diagram-caption {
    font-family: var(--font-mono);
    font-size: 0.78rem;
    color: var(--subatomic-gray);
    margin-top: var(--space-sm);
}

/* Callout Alert Boxes */
.callout {
    padding: var(--space-md) var(--space-lg);
    border-radius: var(--radius-md);
    border-left: 4px solid var(--active-accent);
    background: rgba(0, 240, 255, 0.05);
    margin: var(--space-lg) 0;
}

.callout-green {
    border-left-color: var(--quantum-green);
    background: rgba(0, 255, 157, 0.05);
}

.callout-magenta {
    border-left-color: var(--isotope-magenta);
    background: rgba(255, 0, 60, 0.05);
}

.callout-title {
    font-family: var(--font-mono);
    font-weight: 700;
    font-size: 0.85rem;
    margin-bottom: 4px;
    color: var(--neutron-white);
}

/* Changelog Items */
.changelog-timeline {
    border-left: 2px solid var(--particle-border);
    margin-left: var(--space-md);
    padding-left: var(--space-xl);
    margin-top: var(--space-xl);
}

.changelog-release {
    position: relative;
    margin-bottom: var(--space-3xl);
}

.changelog-release::before {
    content: '';
    position: absolute;
    left: calc(-1 * var(--space-xl) - 7px);
    top: 6px;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--active-accent);
    box-shadow: 0 0 10px var(--active-accent-glow);
}

/* ==========================================================================
   Footer & Open Source Attribution
   ========================================================================== */

.footer {
    border-top: 1px solid var(--particle-border);
    background: var(--deep-space);
    padding: var(--space-3xl) 0 var(--space-xl);
    margin-top: var(--space-3xl);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: var(--space-2xl);
    margin-bottom: var(--space-2xl);
}

.footer-brand-desc {
    color: var(--text-muted);
    font-size: 0.9rem;
    max-width: 340px;
    margin-top: var(--space-sm);
}

.footer-heading {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--neutron-white);
    margin-bottom: var(--space-md);
}

.footer-links-list {
    list-style: none;
    margin: 0;
    padding: 0;
}

.footer-links-list li {
    margin-bottom: 8px;
}

.footer-links-list a {
    color: var(--text-muted);
    font-size: 0.9rem;
    transition: color 0.2s ease;
}

.footer-links-list a:hover {
    color: var(--active-accent);
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    padding-top: var(--space-lg);
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.85rem;
    color: var(--subatomic-gray);
    flex-wrap: wrap;
    gap: var(--space-md);
}

.footer-license {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-family: var(--font-mono);
}

/* ==========================================================================
   Toast Notification & Modals
   ========================================================================== */

.hud-toast {
    position: fixed;
    bottom: 24px;
    right: 24px;
    background: var(--dark-matter-variant);
    border: 1px solid var(--quantum-green);
    border-radius: var(--radius-md);
    padding: 12px 20px;
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--quantum-green);
    box-shadow: 0 0 20px var(--quantum-green-glow);
    display: flex;
    align-items: center;
    gap: 10px;
    z-index: 1000;
    transform: translateY(120%);
    opacity: 0;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.hud-toast.show {
    transform: translateY(0);
    opacity: 1;
}

/* ==========================================================================
   Mobile & Foldable Responsive Architecture
   ========================================================================== */

/* Foldable Inner Displays / Small Tablets (600px - 960px) */
@media (min-width: 600px) and (max-width: 960px) {
    .container {
        padding: 0 var(--space-lg);
    }

    .hero-grid {
        grid-template-columns: 1fr;
        gap: var(--space-xl);
        text-align: center;
    }

    .hero-content {
        align-items: center;
    }

    .hero-features-list, .trust-signals-row {
        justify-content: center;
    }

    .features-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--space-md);
    }

    .download-cards-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .metrics-ribbon {
        display: grid;
        grid-template-columns: repeat(4, 1fr);
        gap: var(--space-sm);
    }

    .picker-card {
        grid-template-columns: 1fr 1fr;
    }

    .doc-layout {
        grid-template-columns: 240px 1fr;
        gap: var(--space-lg);
    }

    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* Standard Mobile Screens (max-width: 768px) */
@media (max-width: 768px) {
    .telemetry-bar {
        padding: 6px 0;
    }

    .telemetry-content {
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
        scrollbar-width: none;
        padding: 0 var(--space-md);
    }

    .telemetry-content::-webkit-scrollbar {
        display: none;
    }

    .navbar-inner {
        height: 64px;
    }

    .nav-links, .nav-actions {
        display: none;
    }

    .nav-toggle {
        display: flex;
        align-items: center;
        justify-content: center;
        width: 44px;
        height: 44px;
    }

    .mobile-menu {
        display: none;
        position: fixed;
        top: 64px;
        left: 0;
        width: 100%;
        max-height: calc(100vh - 64px);
        overflow-y: auto;
        background: rgba(9, 9, 15, 0.98);
        backdrop-filter: blur(20px);
        -webkit-backdrop-filter: blur(20px);
        border-bottom: 1px solid var(--particle-border);
        padding: var(--space-xl) var(--space-lg);
        flex-direction: column;
        gap: var(--space-md);
        z-index: 99;
    }

    .mobile-menu.open {
        display: flex;
    }

    .mobile-menu .nav-link {
        font-size: 1.15rem;
        padding: 10px 0;
        border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    }

    .hero {
        padding: var(--space-xl) 0 var(--space-xl);
        min-height: auto;
    }

    .hero-grid {
        grid-template-columns: 1fr;
        gap: var(--space-2xl);
        text-align: center;
    }

    .hero-content {
        align-items: center;
    }

    .hero-title {
        font-size: clamp(2rem, 8.5vw, 3rem);
    }

    .hero-features-list, .trust-signals-row {
        justify-content: center;
    }

    .btn-group {
        flex-direction: column;
        width: 100%;
        gap: 12px;
    }

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

    .metrics-ribbon {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 12px;
        width: 100%;
    }

    .metric-divider {
        display: none;
    }

    .quantum-viewfinder {
        max-width: min(320px, 85vw);
    }

    .picker-card {
        grid-template-columns: 1fr;
        padding: var(--space-lg);
    }

    .swatches-grid {
        grid-template-columns: repeat(4, 1fr);
        gap: 8px;
    }

    .features-grid {
        grid-template-columns: 1fr;
    }

    .download-cards-grid {
        grid-template-columns: 1fr;
    }

    .doc-layout {
        grid-template-columns: 1fr;
        gap: var(--space-xl);
    }

    .doc-sidebar {
        position: static;
        top: auto;
        width: 100%;
        margin-bottom: var(--space-lg);
    }

    .doc-content {
        padding: var(--space-lg);
    }

    .doc-content ul, .doc-content ol {
        margin-left: var(--space-lg);
    }

    .page-hero {
        padding: var(--space-xl) 0 var(--space-lg);
    }

    .footer-grid {
        grid-template-columns: 1fr;
        gap: var(--space-xl);
    }

    .mobile-floating-bar {
        display: block;
    }

    /* Extra padding at body bottom so mobile-floating-bar does not obscure footer */
    body {
        padding-bottom: calc(76px + env(safe-area-inset-bottom, 0px));
    }
}

/* Small Handhelds & Folded Cover Displays (e.g. Galaxy Z Fold cover screen <= 380px) */
@media (max-width: 380px) {
    .container {
        padding: 0 14px;
    }

    .hero-title {
        font-size: 1.85rem;
    }

    .hero-description {
        font-size: 0.95rem;
    }

    .btn-store {
        padding: 10px 16px;
        gap: 10px;
    }

    .btn-store-title {
        font-size: 0.98rem;
    }

    .quantum-viewfinder {
        max-width: 260px;
    }

    .swatches-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .checksum-box {
        flex-direction: column;
        align-items: stretch;
    }

    .copy-btn {
        width: 100%;
        text-align: center;
        margin-top: 8px;
    }

    .mobile-floating-inner .btn {
        padding: 8px 8px;
        font-size: 0.76rem;
        gap: 5px;
    }

    .doc-content {
        padding: var(--space-md);
        border-radius: var(--radius-md);
    }

    .doc-content ul, .doc-content ol {
        margin-left: var(--space-md);
    }

    .page-hero h1 {
        font-size: 1.6rem;
    }
}

/* Dual-Screen Foldables Spanning Mode (Surface Duo, etc.) */
@media (horizontal-viewport-segments: 2) {
    .hero-grid {
        grid-template-columns: 1fr 1fr;
        gap: var(--space-2xl);
    }

    .doc-layout {
        grid-template-columns: 280px 1fr;
    }
}

@media (prefers-reduced-motion: reduce) {
    *, ::before, ::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}