/* ==========================================================================
   PRIVACY BLUR  GOOGLE DESIGN & M3 EXPRESSIVE DESIGN SYSTEM
   Inspired by design.google & Katie Jacquez: "Code is a Design Material"
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Outfit:wght@400;500;600;700;800;900&family=JetBrains+Mono:wght@400;500;600&display=swap');

:root {
    /* Color Palette - Dark Material 3 Expressive */
    --bg-base: #0a0c12;
    --bg-surface: #10131e;
    --bg-surface-elevated: #161b2a;
    --bg-surface-card: #1c2236;
    --bg-surface-glass: rgba(22, 27, 42, 0.72);
    --bg-surface-border: rgba(255, 255, 255, 0.08);
    --bg-surface-border-hover: rgba(112, 166, 255, 0.35);

    /* Brand Accents */
    --color-primary: #70a6ff;
    --color-primary-rgb: 112, 166, 255;
    --color-primary-glow: rgba(112, 166, 255, 0.25);
    --color-secondary: #c58af9;
    --color-tertiary: #5eead4;
    --color-emerald: #34d399;
    --color-emerald-bg: rgba(52, 211, 153, 0.12);
    --color-coral: #f87171;
    --color-amber: #fbbf24;

    /* Text Tiers */
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --text-on-primary: #05142b;

    /* Gradients */
    --gradient-hero: linear-gradient(135deg, #ffffff 0%, #cbd5e1 45%, #70a6ff 80%, #c58af9 100%);
    --gradient-accent: linear-gradient(135deg, #70a6ff 0%, #c58af9 50%, #5eead4 100%);
    --gradient-card: linear-gradient(180deg, rgba(255, 255, 255, 0.04) 0%, rgba(255, 255, 255, 0.01) 100%);
    --gradient-mesh: radial-gradient(circle at 50% -20%, rgba(112, 166, 255, 0.18) 0%, rgba(197, 138, 249, 0.08) 45%, transparent 70%);

    /* Typography */
    --font-heading: 'Outfit', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-mono: 'JetBrains Mono', monospace;

    /* M3 Expressive Motion Tokens */
    --motion-spring-snappy: cubic-bezier(0.2, 0, 0, 1);
    --motion-spring-bouncy: cubic-bezier(0.34, 1.56, 0.64, 1);
    --motion-spring-gentle: cubic-bezier(0.25, 1, 0.5, 1);
    --motion-duration-fast: 200ms;
    --motion-duration-medium: 400ms;
    --motion-duration-slow: 650ms;

    /* Shadows & Glows */
    --shadow-sm: 0 4px 12px rgba(0, 0, 0, 0.25);
    --shadow-md: 0 12px 32px rgba(0, 0, 0, 0.35);
    --shadow-lg: 0 24px 56px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 40px rgba(112, 166, 255, 0.2);
    --shadow-accent-glow: 0 0 60px rgba(197, 138, 249, 0.25);

    /* Radii */
    --radius-sm: 8px;
    --radius-md: 16px;
    --radius-lg: 24px;
    --radius-xl: 36px;
    --radius-pill: 9999px;
}

/* ==========================================================================
   RESET & CORE BASE
   ========================================================================== */

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

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

body {
    background-color: var(--bg-base);
    color: var(--text-primary);
    font-family: var(--font-body);
    line-height: 1.65;
    overflow-x: hidden;
    position: relative;
    background-image:
        radial-gradient(circle at 15% 10%, rgba(112, 166, 255, 0.12) 0%, transparent 40%),
        radial-gradient(circle at 85% 25%, rgba(197, 138, 249, 0.09) 0%, transparent 45%),
        radial-gradient(circle at 50% 65%, rgba(94, 234, 212, 0.06) 0%, transparent 50%);
    background-attachment: fixed;
}

/* Accessibility skip link */
.skip-link {
    position: absolute;
    top: -50px;
    left: 20px;
    background: var(--color-primary);
    color: var(--text-on-primary);
    padding: 10px 18px;
    border-radius: var(--radius-sm);
    z-index: 10000;
    font-weight: 600;
    text-decoration: none;
    transition: top var(--motion-duration-fast) ease;
}

.skip-link:focus {
    top: 20px;
}

/* Base Layout Containers */
.container {
    width: 100%;
    max-width: 1240px;
    margin-left: auto;
    margin-right: auto;
    padding-left: 24px;
    padding-right: 24px;
}

.section-wrapper {
    position: relative;
    padding: 110px 0;
}

/* ==========================================================================
   TYPOGRAPHY
   ========================================================================== */

h1,
h2,
h3,
h4,
h5,
h6 {
    font-family: var(--font-heading);
    letter-spacing: -0.025em;
    font-weight: 700;
    line-height: 1.15;
    color: var(--text-primary);
}

.text-gradient {
    background: var(--gradient-hero);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    display: inline-block;
}

.text-gradient-accent {
    background: var(--gradient-accent);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    display: inline-block;
}

p {
    color: var(--text-secondary);
    font-size: 1.1rem;
    font-weight: 400;
}

/* Section Header Shared Component */
.section-header {
    text-align: center;
    max-width: 780px;
    margin: 0 auto 64px auto;
}

.section-tag {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 16px;
    border-radius: var(--radius-pill);
    background: rgba(112, 166, 255, 0.1);
    border: 1px solid rgba(112, 166, 255, 0.25);
    color: var(--color-primary);
    font-family: var(--font-mono);
    font-size: 0.82rem;
    font-weight: 600;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    margin-bottom: 20px;
}

.section-title {
    font-size: clamp(2.2rem, 4vw, 3.4rem);
    margin-bottom: 20px;
}

.section-subtitle {
    font-size: clamp(1.05rem, 1.5vw, 1.25rem);
    line-height: 1.6;
}

/* ==========================================================================
   NAVIGATION BAR (Glassmorphism & Fixed)
   ========================================================================== */

.site-header {
    position: sticky;
    top: 0;
    width: 100%;
    z-index: 1000;
    background: rgba(10, 12, 18, 0.78);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--bg-surface-border);
    transition: all var(--motion-duration-fast) ease;
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 76px;
}

.brand-link {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
    color: var(--text-primary);
}

.brand-logo-wrap {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-md);
    background: var(--bg-surface-elevated);
    border: 1px solid rgba(255, 255, 255, 0.12);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.3);
    transition: transform var(--motion-duration-fast) var(--motion-spring-bouncy);
}

.brand-link:hover .brand-logo-wrap {
    transform: scale(1.06) rotate(3deg);
}

.brand-logo-wrap img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.brand-title {
    font-family: var(--font-heading);
    font-size: 1.35rem;
    font-weight: 800;
    letter-spacing: -0.03em;
}

.brand-badge {
    font-family: var(--font-mono);
    font-size: 0.68rem;
    padding: 2px 7px;
    border-radius: 6px;
    background: rgba(52, 211, 153, 0.15);
    color: var(--color-emerald);
    border: 1px solid rgba(52, 211, 153, 0.3);
    margin-left: 6px;
    font-weight: 600;
    vertical-align: middle;
    white-space: nowrap;
    display: inline-block;
}

.nav-menu {
    display: flex;
    align-items: center;
    list-style: none;
    gap: 36px;
}

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.95rem;
    font-weight: 500;
    transition: color var(--motion-duration-fast) ease;
    position: relative;
    padding: 6px 0;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0%;
    height: 2px;
    background: var(--gradient-accent);
    border-radius: 2px;
    transition: width var(--motion-duration-fast) var(--motion-spring-gentle);
}

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

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

.nav-actions {
    display: flex;
    align-items: center;
    gap: 16px;
}

.btn-nav-cta {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: var(--color-primary);
    color: var(--text-on-primary);
    font-family: var(--font-heading);
    font-size: 0.92rem;
    font-weight: 700;
    padding: 10px 20px;
    border-radius: var(--radius-pill);
    text-decoration: none;
    box-shadow: 0 4px 20px var(--color-primary-glow);
    transition: all var(--motion-duration-fast) var(--motion-spring-bouncy);
}

.btn-nav-cta:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 28px rgba(112, 166, 255, 0.45);
    background: #89b7ff;
}

.btn-nav-cta:active {
    transform: scale(0.96);
}

/* Mobile Toggle */
.mobile-menu-btn {
    display: none;
    background: transparent;
    border: none;
    color: var(--text-primary);
    cursor: pointer;
    padding: 8px;
}

/* ==========================================================================
   HERO SECTION
   ========================================================================== */

.hero-section {
    padding: 80px 0 100px 0;
    position: relative;
    overflow: hidden;
}

.hero-grid {
    display: grid;
    grid-template-columns: 1.15fr 0.85fr;
    gap: 56px;
    align-items: center;
}

.hero-badge-pill {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--bg-surface-border);
    padding: 8px 18px;
    border-radius: var(--radius-pill);
    margin-bottom: 28px;
    backdrop-filter: blur(12px);
}

.pill-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--color-emerald);
    box-shadow: 0 0 12px var(--color-emerald);
    animation: pulse 2.5s infinite;
}

@keyframes pulse {

    0%,
    100% {
        opacity: 1;
        transform: scale(1);
    }

    50% {
        opacity: 0.4;
        transform: scale(0.85);
    }
}

.pill-text {
    font-size: 0.88rem;
    font-weight: 600;
    color: var(--text-primary);
}

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

.hero-heading {
    font-size: clamp(2.8rem, 5.2vw, 4.4rem);
    line-height: 1.08;
    margin-bottom: 24px;
}

.hero-lead {
    font-size: clamp(1.15rem, 1.6vw, 1.35rem);
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 38px;
    max-width: 600px;
}

.hero-cta-group {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 16px;
    margin-bottom: 48px;
}

.btn-primary-hero {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    background: linear-gradient(135deg, #70a6ff 0%, #4285f4 100%);
    color: #ffffff;
    font-family: var(--font-heading);
    font-size: 1.1rem;
    font-weight: 700;
    padding: 16px 32px;
    border-radius: var(--radius-pill);
    text-decoration: none;
    box-shadow: 0 10px 30px rgba(66, 133, 244, 0.35);
    transition: all var(--motion-duration-fast) var(--motion-spring-bouncy);
}

.btn-primary-hero:hover {
    transform: translateY(-3px) scale(1.02);
    box-shadow: 0 14px 40px rgba(66, 133, 244, 0.5);
}

.btn-primary-hero:active {
    transform: scale(0.97);
}

.btn-secondary-hero {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    background: var(--bg-surface-glass);
    color: var(--text-primary);
    border: 1px solid var(--bg-surface-border);
    font-family: var(--font-heading);
    font-size: 1.05rem;
    font-weight: 600;
    padding: 16px 28px;
    border-radius: var(--radius-pill);
    text-decoration: none;
    backdrop-filter: blur(16px);
    transition: all var(--motion-duration-fast) ease;
}

.btn-secondary-hero:hover {
    background: rgba(255, 255, 255, 0.08);
    border-color: rgba(255, 255, 255, 0.2);
    transform: translateY(-2px);
}

.hero-trust-row {
    display: flex;
    align-items: center;
    gap: 24px;
    padding-top: 24px;
    border-top: 1px solid var(--bg-surface-border);
}

.trust-item {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.88rem;
    color: var(--text-muted);
}

.trust-icon {
    color: var(--color-emerald);
}

/* Hero Visual Mockup */
.hero-visual-card {
    position: relative;
    background: var(--bg-surface-glass);
    border: 1px solid var(--bg-surface-border);
    border-radius: var(--radius-xl);
    padding: 18px;
    box-shadow: var(--shadow-lg), var(--shadow-glow);
    backdrop-filter: blur(24px);
}

.device-chrome {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 6px 12px 14px 12px;
    border-bottom: 1px solid var(--bg-surface-border);
    margin-bottom: 14px;
}

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

.chrome-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
}

.dot-red {
    background: #ef4444;
}

.dot-yellow {
    background: #f59e0b;
}

.dot-green {
    background: #10b981;
}

.chrome-label {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--text-muted);
}

.device-canvas-preview {
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
    background: #000;
    aspect-ratio: 9 / 13;
    display: flex;
    align-items: center;
    justify-content: center;
}

.device-canvas-preview img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

/* Floating overlay badges */
.hero-floating-badge {
    position: absolute;
    bottom: 24px;
    left: -20px;
    background: rgba(18, 22, 34, 0.88);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(112, 166, 255, 0.3);
    padding: 12px 20px;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
    display: flex;
    align-items: center;
    gap: 12px;
    z-index: 10;
    animation: floatSlow 6s ease-in-out infinite alternate;
}

@keyframes floatSlow {
    0% {
        transform: translateY(0px);
    }

    100% {
        transform: translateY(-10px);
    }
}

.floating-badge-icon {
    font-size: 1.5rem;
}

.floating-badge-text strong {
    display: block;
    font-size: 0.92rem;
    color: var(--text-primary);
}

.floating-badge-text span {
    font-size: 0.78rem;
    color: var(--color-emerald);
}

/* ==========================================================================
   INTERACTIVE REDACTION SANDBOX ("Touch the Material")
   ========================================================================== */

.sandbox-container {
    background: var(--bg-surface-elevated);
    border: 1px solid var(--bg-surface-border);
    border-radius: var(--radius-xl);
    padding: 40px;
    box-shadow: var(--shadow-lg);
    position: relative;
    overflow: hidden;
}

.sandbox-toolbar {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
    margin-bottom: 32px;
    padding-bottom: 24px;
    border-bottom: 1px solid var(--bg-surface-border);
}

.tool-group {
    display: flex;
    align-items: center;
    gap: 8px;
}

.tool-label {
    font-family: var(--font-mono);
    font-size: 0.78rem;
    color: var(--text-muted);
    margin-right: 6px;
    text-transform: uppercase;
}

.chip-btn {
    background: var(--bg-surface-glass);
    border: 1px solid var(--bg-surface-border);
    color: var(--text-secondary);
    padding: 8px 16px;
    border-radius: var(--radius-pill);
    font-family: var(--font-heading);
    font-size: 0.88rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--motion-duration-fast) var(--motion-spring-bouncy);
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.chip-btn:hover {
    border-color: var(--color-primary);
    color: var(--text-primary);
    transform: translateY(-1px);
}

.chip-btn.active {
    background: var(--color-primary);
    color: var(--text-on-primary);
    border-color: var(--color-primary);
    box-shadow: 0 4px 16px var(--color-primary-glow);
}

/* Interactive Before/After Split Area */
.sandbox-stage {
    position: relative;
    width: 100%;
    height: 480px;
    border-radius: var(--radius-lg);
    overflow: hidden;
    background: #000;
    user-select: none;
    cursor: ew-resize;
    box-shadow: inset 0 0 40px rgba(0, 0, 0, 0.8);
}

.stage-img-layer {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
}

.stage-img-layer img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
}

.stage-redacted-layer {
    position: absolute;
    top: 0;
    left: 0;
    height: 100%;
    width: 50%;
    overflow: hidden;
    border-right: 2px solid #ffffff;
    box-shadow: 4px 0 24px rgba(0, 0, 0, 0.6);
}

.stage-redacted-layer img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
    /* Redaction visual mode controlled via JS class */
}

/* Redaction styles for the simulator */
.redact-mosaic img {
    filter: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg"><filter id="pixelate"><feFlood x="2" y="2" height="1" width="1"/><feComposite width="14" height="14"/><feTile result="a"/><feComposite in="SourceGraphic" in2="a" operator="in"/><feMorphology operator="dilate" radius="3"/></filter></svg>#pixelate');
}

.redact-blur img {
    filter: blur(14px) saturate(1.4);
}

.redact-blackout img {
    filter: contrast(300%) brightness(0);
}

/* Live Detection Boxes */
.detection-box {
    position: absolute;
    border: 2px dashed #4ade80;
    background: rgba(74, 222, 128, 0.15);
    border-radius: 6px;
    display: flex;
    align-items: flex-start;
    padding: 4px 8px;
    font-family: var(--font-mono);
    font-size: 0.72rem;
    font-weight: 700;
    color: #4ade80;
    pointer-events: none;
    transition: all 0.3s ease;
}

.box-label {
    background: rgba(0, 0, 0, 0.85);
    padding: 2px 6px;
    border-radius: 4px;
    letter-spacing: 0.05em;
}

/* Redaction Overlay Patches */
.redaction-patch {
    position: absolute;
    border-radius: 4px;
    transition: all var(--motion-duration-fast) ease;
}

.patch-blackout {
    background: #000000;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.8);
}

.patch-mosaic {
    background-image:
        linear-gradient(45deg, #1f2937 25%, transparent 25%),
        linear-gradient(-45deg, #1f2937 25%, transparent 25%),
        linear-gradient(45deg, transparent 75%, #1f2937 75%),
        linear-gradient(-45deg, transparent 75%, #1f2937 75%);
    background-size: 14px 14px;
    background-color: #374151;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.8);
}

.patch-blur {
    backdrop-filter: blur(16px);
    background: rgba(255, 255, 255, 0.2);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

/* Split Handle */
.sandbox-slider-handle {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 44px;
    height: 44px;
    background: #ffffff;
    color: #0b0d14;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.6);
    cursor: grab;
    z-index: 20;
    transition: transform var(--motion-duration-fast) var(--motion-spring-bouncy);
}

.sandbox-slider-handle:hover {
    transform: translate(-50%, -50%) scale(1.12);
}

.handle-arrows {
    font-size: 1.1rem;
    font-weight: 800;
    user-select: none;
}

.sandbox-info-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 24px;
    font-size: 0.88rem;
    color: var(--text-muted);
}

.sandbox-telemetry {
    font-family: var(--font-mono);
    color: var(--color-primary);
}

/* ==========================================================================
   EDITORIAL SECTION: "CODE IS A DESIGN MATERIAL" (CONFIG / GOOGLE DESIGN)
   ========================================================================== */

.editorial-section {
    background: linear-gradient(180deg, var(--bg-surface) 0%, var(--bg-base) 100%);
    border-top: 1px solid var(--bg-surface-border);
    border-bottom: 1px solid var(--bg-surface-border);
}

.editorial-card-main {
    background: var(--bg-surface-elevated);
    border: 1px solid var(--bg-surface-border);
    border-radius: var(--radius-xl);
    padding: clamp(32px, 5vw, 64px);
    box-shadow: var(--shadow-lg);
    position: relative;
    overflow: hidden;
}

.editorial-card-main::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient-accent);
}

.editorial-meta {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 32px;
}

.author-avatar {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: linear-gradient(135deg, #70a6ff 0%, #c58af9 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    color: #ffffff;
    font-family: var(--font-heading);
}

.author-info h4 {
    font-size: 1.05rem;
    margin-bottom: 2px;
}

.author-info p {
    font-size: 0.85rem;
    color: var(--text-muted);
}

.editorial-quote {
    font-size: clamp(1.4rem, 2.5vw, 2.1rem);
    font-family: var(--font-heading);
    font-weight: 600;
    line-height: 1.35;
    color: var(--text-primary);
    margin-bottom: 40px;
    border-left: 4px solid var(--color-primary);
    padding-left: 24px;
}

.editorial-columns {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
}

.editorial-column h3 {
    font-size: 1.4rem;
    margin-bottom: 16px;
    color: var(--color-primary);
}

.editorial-column p {
    font-size: 1.05rem;
    line-height: 1.7;
    margin-bottom: 20px;
}

.editorial-callout {
    background: rgba(112, 166, 255, 0.05);
    border: 1px solid rgba(112, 166, 255, 0.2);
    border-radius: var(--radius-md);
    padding: 20px;
    margin-top: 24px;
}

.editorial-callout h5 {
    font-family: var(--font-heading);
    font-size: 1rem;
    color: var(--color-primary);
    margin-bottom: 8px;
}

.editorial-callout p {
    font-size: 0.92rem;
    margin-bottom: 0;
}

/* ==========================================================================
   M3 EXPRESSIVE SPRING PHYSICS PLAYGROUND
   ========================================================================== */

.physics-playground {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 40px;
    background: var(--bg-surface-elevated);
    border: 1px solid var(--bg-surface-border);
    border-radius: var(--radius-xl);
    padding: 40px;
    box-shadow: var(--shadow-lg);
}

.physics-controls {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.slider-control {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.slider-header {
    display: flex;
    justify-content: space-between;
    font-size: 0.9rem;
    font-weight: 600;
}

.slider-val {
    font-family: var(--font-mono);
    color: var(--color-primary);
}

input[type="range"] {
    width: 100%;
    height: 6px;
    border-radius: 3px;
    background: rgba(255, 255, 255, 0.12);
    outline: none;
    -webkit-appearance: none;
}

input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--color-primary);
    cursor: pointer;
    box-shadow: 0 2px 10px var(--color-primary-glow);
    transition: transform 0.15s ease;
}

input[type="range"]::-webkit-slider-thumb:hover {
    transform: scale(1.2);
}

.preset-pills {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 8px;
}

.preset-btn {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--bg-surface-border);
    color: var(--text-secondary);
    padding: 6px 14px;
    border-radius: var(--radius-pill);
    font-size: 0.8rem;
    cursor: pointer;
    transition: all 0.2s ease;
}

.preset-btn:hover {
    border-color: var(--color-primary);
    color: var(--text-primary);
}

.physics-canvas-area {
    background: #000000;
    border-radius: var(--radius-lg);
    border: 1px solid var(--bg-surface-border);
    position: relative;
    height: 380px;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
}

.spring-interactive-card {
    width: 220px;
    padding: 24px;
    background: linear-gradient(135deg, rgba(30, 41, 59, 0.9) 0%, rgba(15, 23, 42, 0.9) 100%);
    border: 1px solid rgba(112, 166, 255, 0.4);
    border-radius: var(--radius-lg);
    text-align: center;
    cursor: grab;
    user-select: none;
    box-shadow: 0 16px 36px rgba(0, 0, 0, 0.6);
    position: absolute;
    transition: box-shadow 0.2s ease;
}

.spring-interactive-card:active {
    cursor: grabbing;
    box-shadow: 0 24px 50px rgba(112, 166, 255, 0.35);
}

.spring-card-icon {
    font-size: 2.2rem;
    margin-bottom: 12px;
}

.spring-card-title {
    font-size: 1.1rem;
    margin-bottom: 6px;
}

.spring-card-hint {
    font-size: 0.78rem;
    color: var(--text-muted);
}

.spring-telemetry-badge {
    position: absolute;
    bottom: 16px;
    left: 16px;
    font-family: var(--font-mono);
    font-size: 0.72rem;
    color: var(--text-muted);
    background: rgba(15, 23, 42, 0.7);
    padding: 4px 10px;
    border-radius: 6px;
}

/* ==========================================================================
   FEATURES & ARCHITECTURE SECTION
   ========================================================================== */

.feature-cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 28px;
}

.m3-card {
    background: var(--bg-surface-elevated);
    border: 1px solid var(--bg-surface-border);
    border-radius: var(--radius-lg);
    padding: 36px;
    position: relative;
    overflow: hidden;
    transition: all var(--motion-duration-medium) var(--motion-spring-gentle);
}

.m3-card:hover {
    transform: translateY(-6px);
    border-color: var(--bg-surface-border-hover);
    box-shadow: var(--shadow-md);
}

.m3-card-icon {
    width: 54px;
    height: 54px;
    border-radius: var(--radius-md);
    background: rgba(112, 166, 255, 0.1);
    border: 1px solid rgba(112, 166, 255, 0.25);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.6rem;
    margin-bottom: 24px;
}

.m3-card h3 {
    font-size: 1.35rem;
    margin-bottom: 12px;
}

.m3-card p {
    font-size: 0.98rem;
    line-height: 1.6;
}

/* Architecture Comparison Table */
.comparison-container {
    background: var(--bg-surface-elevated);
    border: 1px solid var(--bg-surface-border);
    border-radius: var(--radius-xl);
    overflow: hidden;
    margin-top: 80px;
    box-shadow: var(--shadow-md);
}

.comparison-table {
    width: 100%;
    border-collapse: collapse;
    text-align: left;
}

.comparison-table th,
.comparison-table td {
    padding: 20px 28px;
    border-bottom: 1px solid var(--bg-surface-border);
}

.comparison-table th {
    background: rgba(255, 255, 255, 0.02);
    font-family: var(--font-heading);
    font-size: 1.05rem;
    color: var(--text-primary);
}

.comparison-table tr:last-child td {
    border-bottom: none;
}

.col-feature {
    font-weight: 600;
    color: var(--text-primary);
    width: 38%;
}

.col-cloud {
    color: var(--text-muted);
    width: 31%;
}

.col-privacyblur {
    color: var(--color-emerald);
    font-weight: 600;
    width: 31%;
    background: rgba(52, 211, 153, 0.03);
}

/* ==========================================================================
   APP SHOWCASE GALLERY (Real Production Screenshots)
   ========================================================================== */

.gallery-tabs {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 12px;
    margin-bottom: 48px;
}

.gallery-tab-btn {
    background: var(--bg-surface-glass);
    border: 1px solid var(--bg-surface-border);
    color: var(--text-secondary);
    padding: 10px 22px;
    border-radius: var(--radius-pill);
    font-family: var(--font-heading);
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--motion-duration-fast) var(--motion-spring-bouncy);
}

.gallery-tab-btn:hover {
    border-color: var(--color-primary);
    color: var(--text-primary);
}

.gallery-tab-btn.active {
    background: var(--color-primary);
    color: var(--text-on-primary);
    border-color: var(--color-primary);
    box-shadow: 0 4px 20px var(--color-primary-glow);
}

.gallery-display {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    align-items: center;
    background: var(--bg-surface-elevated);
    border: 1px solid var(--bg-surface-border);
    border-radius: var(--radius-xl);
    padding: 56px;
    box-shadow: var(--shadow-lg);
}

.gallery-phone-frame {
    width: 300px;
    margin: 0 auto;
    background: #05070a;
    border: 10px solid #1f2438;
    border-radius: 46px;
    box-shadow: 0 25px 60px rgba(0, 0, 0, 0.8), 0 0 40px rgba(112, 166, 255, 0.2);
    overflow: hidden;
    position: relative;
    aspect-ratio: 9 / 19.5;
}

.gallery-phone-frame img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    transition: opacity 0.3s ease;
}

.gallery-content-desc h3 {
    font-size: 2.2rem;
    margin-bottom: 16px;
}

.gallery-content-desc p {
    font-size: 1.15rem;
    line-height: 1.7;
    margin-bottom: 28px;
}

.gallery-feature-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.gallery-feature-list li {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 1rem;
    color: var(--text-primary);
}

.gallery-feature-list li svg {
    color: var(--color-emerald);
    flex-shrink: 0;
}

/* ==========================================================================
   FAQ SECTION (Accessible Accordion)
   ========================================================================== */

.faq-accordion {
    max-width: 860px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.faq-item {
    background: var(--bg-surface-elevated);
    border: 1px solid var(--bg-surface-border);
    border-radius: var(--radius-md);
    overflow: hidden;
    transition: border-color var(--motion-duration-fast) ease;
}

.faq-item:hover {
    border-color: var(--bg-surface-border-hover);
}

.faq-header {
    width: 100%;
    text-align: left;
    background: transparent;
    border: none;
    padding: 24px 28px;
    color: var(--text-primary);
    font-family: var(--font-heading);
    font-size: 1.18rem;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 16px;
}

.faq-icon {
    font-size: 1.4rem;
    color: var(--color-primary);
    transition: transform var(--motion-duration-fast) var(--motion-spring-bouncy);
}

.faq-item.open .faq-icon {
    transform: rotate(45deg);
}

.faq-body {
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--motion-duration-medium) var(--motion-spring-gentle);
}

.faq-content {
    padding: 0 28px 24px 28px;
    font-size: 1.02rem;
    color: var(--text-secondary);
    line-height: 1.65;
}

/* ==========================================================================
   CALL TO ACTION (CTA BANNER)
   ========================================================================== */

.cta-banner-section {
    position: relative;
    padding: 90px 0;
}

.cta-banner-card {
    background: radial-gradient(circle at 50% 0%, rgba(112, 166, 255, 0.25) 0%, rgba(22, 27, 42, 0.95) 75%), var(--bg-surface);
    border: 1px solid rgba(112, 166, 255, 0.3);
    border-radius: var(--radius-xl);
    padding: clamp(40px, 6vw, 72px);
    text-align: center;
    box-shadow: var(--shadow-lg), var(--shadow-glow);
    position: relative;
    overflow: hidden;
}

.cta-banner-card h2 {
    font-size: clamp(2.4rem, 4.5vw, 3.6rem);
    margin-bottom: 20px;
}

.cta-banner-card p {
    font-size: 1.25rem;
    max-width: 650px;
    margin: 0 auto 36px auto;
}

.playstore-badge-large {
    display: inline-flex;
    align-items: center;
    gap: 14px;
    background: #000000;
    color: #ffffff;
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: var(--radius-lg);
    padding: 14px 28px;
    text-decoration: none;
    transition: all var(--motion-duration-fast) var(--motion-spring-bouncy);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.6);
}

.playstore-badge-large:hover {
    transform: translateY(-3px);
    border-color: var(--color-primary);
    box-shadow: 0 12px 36px rgba(112, 166, 255, 0.3);
}

.playstore-badge-large svg {
    width: 32px;
    height: 32px;
}

.playstore-text-sub {
    font-size: 0.72rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: #cbd5e1;
    display: block;
    text-align: left;
}

.playstore-text-main {
    font-family: var(--font-heading);
    font-size: 1.3rem;
    font-weight: 700;
    display: block;
    text-align: left;
}

/* ==========================================================================
   FOOTER
   ========================================================================== */

.site-footer {
    border-top: 1px solid var(--bg-surface-border);
    padding: 80px 0 40px 0;
    background: #07080d;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 48px;
    margin-bottom: 64px;
}

.footer-brand p {
    font-size: 0.95rem;
    color: var(--text-muted);
    max-width: 320px;
    margin-top: 14px;
}

.footer-col h4 {
    font-size: 1rem;
    margin-bottom: 20px;
    color: var(--text-primary);
}

.footer-links {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.footer-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.92rem;
    transition: color 0.2s ease;
}

.footer-links a:hover {
    color: var(--color-primary);
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 32px;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    font-size: 0.85rem;
    color: var(--text-muted);
    flex-wrap: wrap;
    gap: 16px;
}

.footer-tribute {
    display: flex;
    align-items: center;
    gap: 6px;
}

.footer-tribute a {
    color: var(--color-primary);
    text-decoration: none;
}

/* ==========================================================================
   RESPONSIVE DESIGN (Breakpoints)
   ========================================================================== */

@media (max-width: 1024px) {
    .hero-grid {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 48px;
    }

    .hero-lead {
        margin-left: auto;
        margin-right: auto;
    }

    .hero-cta-group {
        justify-content: center;
    }

    .hero-trust-row {
        justify-content: center;
    }

    .hero-visual-card {
        max-width: 440px;
        margin: 0 auto;
    }

    .editorial-columns {
        grid-template-columns: 1fr;
        gap: 32px;
    }

    .physics-playground {
        grid-template-columns: 1fr;
    }

    .gallery-display {
        grid-template-columns: 1fr;
        text-align: center;
        padding: 36px;
    }

    .gallery-feature-list li {
        justify-content: center;
    }

    .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: 36px;
    }
}

@media (max-width: 768px) {

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

    .mobile-menu-btn {
        display: block;
    }

    .site-header.mobile-open .nav-menu {
        display: flex;
        flex-direction: column;
        position: absolute;
        top: 76px;
        left: 0;
        right: 0;
        background: var(--bg-surface-elevated);
        padding: 24px;
        border-bottom: 1px solid var(--bg-surface-border);
        gap: 20px;
    }

    .site-header.mobile-open .nav-actions {
        display: flex;
        padding: 0 24px 24px 24px;
        background: var(--bg-surface-elevated);
    }

    .section-wrapper {
        padding: 70px 0;
    }

    .sandbox-container {
        padding: 20px;
    }

    .sandbox-stage {
        height: 320px;
    }

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

    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }
}