/* ==========================================================================
   VitalSync Health Tracker — Marketing Design System & Theme CSS
   Strict Compliance: Zero Static Component Colors & Master Flow Invariants
   ========================================================================== */

:root {
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-heading: 'Outfit', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-mono: 'Roboto Mono', monospace;

    /* Theme HSL Primitives (Dark Mode Default) */
    --bg-hsl: 240 23% 3%;
    --fg-hsl: 210 40% 96%;
    --primary-hsl: 186 100% 28%;
    --primary-teal-hsl: 186 100% 23%;
    --primary-teal-light-hsl: 187 71% 59%;
    --accent-cyan-hsl: 189 94% 53%;
    --accent-purple-hsl: 271 91% 65%;
    --status-normal-hsl: 160 84% 39%;
    --status-elevated-hsl: 38 92% 50%;
    --status-stage1-hsl: 25 95% 53%;
    --status-stage2-hsl: 21 90% 48%;
    --status-crisis-hsl: 0 84% 60%;
    --white-hsl: 0 0% 100%;
    --black-hsl: 0 0% 0%;

    /* Theme Color Tokens */
    --bg-color: hsl(var(--bg-hsl));
    --text-color: hsl(var(--fg-hsl));
    --text-muted: hsl(var(--fg-hsl) / 0.72);
    --text-dim: hsl(var(--fg-hsl) / 0.45);

    /* Glass Surfaces */
    --card-bg: hsl(var(--white-hsl) / 0.03);
    --card-border: hsl(var(--white-hsl) / 0.08);
    --card-hover-border: hsl(var(--accent-cyan-hsl) / 0.35);
    --card-shadow: 0 20px 50px hsl(var(--black-hsl) / 0.5);
    --nav-bg: hsl(var(--bg-hsl) / 0.8);
    --glass-blur: blur(16px);

    /* Interactive & Component Tokens */
    --field-bg: hsl(var(--black-hsl) / 0.25);
    --unit-toggle-bg: hsl(var(--black-hsl) / 0.2);
    --badge-overlay-bg: hsl(var(--bg-hsl) / 0.85);
    --promo-badge-bg: hsl(var(--accent-cyan-hsl) / 0.08);
    --promo-badge-border: hsl(var(--accent-cyan-hsl) / 0.25);
    --preset-active-bg: hsl(var(--accent-cyan-hsl) / 0.15);
    --pill-tag-bg: hsl(var(--accent-cyan-hsl) / 0.08);
    --pill-tag-border: hsl(var(--accent-cyan-hsl) / 0.2);
    --gallery-container-bg: hsl(var(--black-hsl) / 0.3);
    --gallery-caption-bg: linear-gradient(180deg, transparent 0%, hsl(var(--bg-hsl) / 0.95) 100%);
    --gallery-caption-title: hsl(var(--white-hsl));
    --gallery-caption-desc: hsl(var(--white-hsl) / 0.8);
    --footer-bg: hsl(var(--black-hsl) / 0.3);
    --btn-primary-text: hsl(var(--white-hsl));
    --btn-primary-border: hsl(var(--white-hsl) / 0.15);

    /* Clinical Brand Accents */
    --primary-color: hsl(var(--primary-hsl));
    --primary-teal: hsl(var(--primary-teal-hsl));
    --primary-teal-light: hsl(var(--primary-teal-light-hsl));
    --accent-cyan: hsl(var(--accent-cyan-hsl));
    --accent-purple: hsl(var(--accent-purple-hsl));
    --accent-glow: hsl(var(--accent-cyan-hsl) / 0.3);

    /* Clinical Status Indicators (ADA / AHA) */
    --status-normal: hsl(var(--status-normal-hsl));
    --status-normal-bg: hsl(var(--status-normal-hsl) / 0.12);
    --status-normal-border: hsl(var(--status-normal-hsl) / 0.3);

    --status-elevated: hsl(var(--status-elevated-hsl));
    --status-elevated-bg: hsl(var(--status-elevated-hsl) / 0.12);
    --status-elevated-border: hsl(var(--status-elevated-hsl) / 0.3);

    --status-stage1: hsl(var(--status-stage1-hsl));
    --status-stage1-bg: hsl(var(--status-stage1-hsl) / 0.12);
    --status-stage1-border: hsl(var(--status-stage1-hsl) / 0.3);

    --status-stage2: hsl(var(--status-stage2-hsl));
    --status-stage2-bg: hsl(var(--status-stage2-hsl) / 0.15);
    --status-stage2-border: hsl(var(--status-stage2-hsl) / 0.35);

    --status-crisis: hsl(var(--status-crisis-hsl));
    --status-crisis-bg: hsl(var(--status-crisis-hsl) / 0.14);
    --status-crisis-border: hsl(var(--status-crisis-hsl) / 0.35);

    /* Ambient Space Canvas */
    --aurora-blend: screen;
    --aurora-opacity: 0.28;

    /* Transitions & Radii */
    --radius-sm: 8px;
    --radius-md: 14px;
    --radius-lg: 20px;
    --radius-xl: 28px;
    --radius-full: 9999px;

    --transition-fast: 0.2s cubic-bezier(0.16, 1, 0.3, 1);
    --transition-smooth: 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

/* Light Theme Overrides */
html.light-theme {
    --bg-hsl: 240 20% 98%;
    --fg-hsl: 222 47% 6%;
    --primary-hsl: 186 100% 28%;
    --primary-teal-hsl: 186 100% 23%;
    --primary-teal-light-hsl: 186 100% 23%;
    --accent-cyan-hsl: 192 91% 36%;
    --accent-purple-hsl: 271 81% 56%;
    --status-normal-hsl: 161 94% 30%;
    --status-elevated-hsl: 36 95% 44%;
    --status-stage1-hsl: 21 90% 48%;
    --status-stage2-hsl: 17 88% 40%;
    --status-crisis-hsl: 0 72% 51%;

    --card-bg: hsl(var(--white-hsl) / 0.85);
    --card-border: hsl(214 32% 91% / 0.8);
    --card-hover-border: hsl(var(--primary-hsl) / 0.4);
    --card-shadow: 0 15px 40px hsl(222 47% 11% / 0.08);
    --nav-bg: hsl(var(--bg-hsl) / 0.85);

    --field-bg: hsl(var(--black-hsl) / 0.04);
    --unit-toggle-bg: hsl(var(--black-hsl) / 0.05);
    --badge-overlay-bg: hsl(var(--white-hsl) / 0.88);
    --promo-badge-bg: hsl(var(--accent-cyan-hsl) / 0.08);
    --promo-badge-border: hsl(var(--accent-cyan-hsl) / 0.25);
    --preset-active-bg: hsl(var(--accent-cyan-hsl) / 0.12);
    --pill-tag-bg: hsl(var(--accent-cyan-hsl) / 0.08);
    --pill-tag-border: hsl(var(--accent-cyan-hsl) / 0.2);
    --gallery-container-bg: hsl(var(--black-hsl) / 0.04);
    --gallery-caption-bg: linear-gradient(180deg, transparent 0%, hsl(var(--bg-hsl) / 0.95) 100%);
    --gallery-caption-title: hsl(var(--fg-hsl));
    --gallery-caption-desc: hsl(var(--fg-hsl) / 0.8);
    --footer-bg: hsl(var(--fg-hsl) / 0.03);
    --btn-primary-text: hsl(var(--white-hsl));
    --btn-primary-border: hsl(var(--primary-teal-hsl) / 0.2);

    --aurora-blend: multiply;
    --aurora-opacity: 0.1;
}

/* ==========================================================================
   Reset & Base Locks (Mandatory: overflow-x: hidden on html & body)
   ========================================================================== */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html, body {
    width: 100%;
    overflow-x: hidden;
    background-color: var(--bg-color);
    color: var(--text-color);
    font-family: var(--font-primary);
    line-height: 1.6;
    scroll-behavior: smooth;
    transition: background-color var(--transition-smooth), color var(--transition-smooth);
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

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

.gradient-text {
    background: linear-gradient(135deg, var(--accent-cyan) 0%, var(--primary-teal-light) 50%, var(--accent-purple) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-gradient-text {
    background: linear-gradient(135deg, var(--text-color) 0%, var(--accent-cyan) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* ==========================================================================
   Ambient Space Canvas & Orbs
   ========================================================================== */
.ambient-glows {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
    pointer-events: none;
    z-index: -1;
}

.aurora-blob {
    position: absolute;
    border-radius: 50%;
    filter: blur(110px);
    mix-blend-mode: var(--aurora-blend);
    opacity: var(--aurora-opacity);
    transition: opacity var(--transition-smooth);
}

.blob-teal {
    top: -120px;
    left: 10%;
    width: 650px;
    height: 650px;
    background: radial-gradient(circle, var(--primary-teal) 0%, var(--accent-cyan) 100%);
}

.blob-cyan {
    top: 800px;
    right: 5%;
    width: 550px;
    height: 550px;
    background: radial-gradient(circle, var(--accent-cyan) 0%, var(--primary-color) 100%);
}

.blob-purple {
    top: 1700px;
    left: 8%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, var(--accent-purple) 0%, var(--primary-teal) 100%);
}

/* ==========================================================================
   Glassmorphic Surface Base
   ========================================================================== */
.glass-card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: var(--radius-lg);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    box-shadow: var(--card-shadow);
    transition: border-color var(--transition-fast), transform var(--transition-fast);
}

/* Badges & Pills */
.neon-badge {
    display: inline-block;
    padding: 6px 14px;
    border-radius: var(--radius-full);
    background: var(--status-normal-bg);
    border: 1px solid var(--status-normal-border);
    color: var(--accent-cyan);
    font-size: 0.82rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    margin-bottom: 12px;
}

.promo-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 16px;
    border-radius: var(--radius-full);
    background: var(--promo-badge-bg);
    border: 1px solid var(--promo-badge-border);
    color: var(--accent-cyan);
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 20px;
}

/* ==========================================================================
   Sticky Navbar
   ========================================================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background: var(--nav-bg);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border-bottom: 1px solid var(--card-border);
    transition: all var(--transition-smooth);
}

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

.brand-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
}

.nav-logo-icon {
    width: 40px;
    height: 40px;
    border-radius: 10px;
    object-fit: cover;
    box-shadow: 0 4px 12px hsl(var(--black-hsl) / 0.3);
}

.logo-text {
    font-family: var(--font-heading);
    font-size: 1.35rem;
    font-weight: 800;
    letter-spacing: -0.02em;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 28px;
}

.nav-links a {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.92rem;
    font-weight: 500;
    transition: color var(--transition-fast);
}

.nav-links a:hover {
    color: var(--accent-cyan);
}

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

.theme-toggle-btn {
    background: transparent;
    border: 1px solid var(--card-border);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    color: var(--text-color);
    transition: all var(--transition-fast);
}

.theme-toggle-btn:hover {
    border-color: var(--accent-cyan);
    color: var(--accent-cyan);
}

.sun-icon {
    display: none;
    width: 20px;
    height: 20px;
}

.moon-icon {
    display: block;
    width: 20px;
    height: 20px;
}

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

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

.glow-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 24px;
    border-radius: var(--radius-full);
    background: linear-gradient(135deg, var(--primary-teal) 0%, var(--primary-color) 100%);
    color: var(--btn-primary-text);
    font-family: var(--font-primary);
    font-size: 0.92rem;
    font-weight: 600;
    text-decoration: none;
    border: 1px solid var(--btn-primary-border);
    box-shadow: 0 4px 18px var(--accent-glow);
    transition: all var(--transition-fast);
}

.glow-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px var(--accent-glow);
}

/* ==========================================================================
   Hero Section
   ========================================================================== */
.hero-section {
    padding: 140px 0 80px;
    position: relative;
}

.hero-grid {
    display: grid;
    grid-template-columns: 1.15fr 0.85fr;
    gap: 50px;
    align-items: center;
}

.hero-title {
    font-size: 3.4rem;
    font-weight: 800;
    letter-spacing: -0.03em;
    margin-bottom: 20px;
    line-height: 1.15;
}

.hero-description {
    font-size: 1.1rem;
    color: var(--text-muted);
    margin-bottom: 32px;
    line-height: 1.7;
    max-width: 580px;
}

.hero-actions {
    display: flex;
    align-items: center;
    gap: 20px;
    margin-bottom: 40px;
    flex-wrap: wrap;
}

.play-store-badge-img {
    height: 54px;
    width: auto;
    display: block;
    transition: transform var(--transition-fast);
}

.play-store-badge-img:hover {
    transform: translateY(-2px);
}

.secondary-cta-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 24px;
    border-radius: var(--radius-full);
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    color: var(--text-color);
    font-size: 0.95rem;
    font-weight: 600;
    text-decoration: none;
    transition: all var(--transition-fast);
}

.secondary-cta-btn:hover {
    border-color: var(--accent-cyan);
    color: var(--accent-cyan);
    transform: translateY(-2px);
}

.hero-stats {
    display: flex;
    align-items: center;
    gap: 24px;
    padding-top: 24px;
    border-top: 1px solid var(--card-border);
}

.stat-item {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.stat-num {
    font-family: var(--font-heading);
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--text-color);
}

.stat-label {
    font-size: 0.8rem;
    color: var(--text-muted);
}

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

.hero-mockup-wrapper {
    position: relative;
}

.hero-image-card {
    position: relative;
    border-radius: var(--radius-xl);
    overflow: hidden;
    padding: 8px;
    background: linear-gradient(135deg, hsl(var(--white-hsl) / 0.05), hsl(var(--accent-cyan-hsl) / 0.05));
}

.hero-graphic-img {
    width: 100%;
    height: auto;
    border-radius: var(--radius-lg);
    display: block;
}

.hero-badge-overlay {
    position: absolute;
    bottom: 24px;
    left: 24px;
    right: 24px;
    background: var(--badge-overlay-bg);
    border: 1px solid var(--card-border);
    border-radius: var(--radius-full);
    padding: 10px 18px;
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-color);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
}

.live-pulse-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background-color: var(--status-normal);
    box-shadow: 0 0 10px var(--status-normal);
    animation: pulseGlow 2s infinite;
}

@keyframes pulseGlow {
    0% { transform: scale(0.95); opacity: 0.8; }
    50% { transform: scale(1.15); opacity: 1; }
    100% { transform: scale(0.95); opacity: 0.8; }
}

/* ==========================================================================
   Features Section
   ========================================================================== */
.features-section {
    padding: 100px 0;
}

.section-header {
    margin-bottom: 50px;
}

.section-header.center {
    text-align: center;
    max-width: 680px;
    margin-left: auto;
    margin-right: auto;
}

.section-header h2 {
    font-size: 2.3rem;
    letter-spacing: -0.02em;
    margin-bottom: 14px;
}

.section-header p {
    font-size: 1.05rem;
    color: var(--text-muted);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
}

.feature-card {
    padding: 36px;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.feature-card:hover {
    border-color: var(--card-hover-border);
    transform: translateY(-4px);
}

.feature-icon {
    font-size: 2.2rem;
    margin-bottom: 4px;
}

.feature-card h3 {
    font-size: 1.35rem;
}

.feature-card p {
    color: var(--text-muted);
    font-size: 0.95rem;
    line-height: 1.65;
}

.feature-checklist {
    list-style: none;
    margin-top: 8px;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.feature-checklist li {
    font-size: 0.88rem;
    color: var(--text-muted);
    padding-left: 20px;
    position: relative;
}

.feature-checklist li::before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--status-normal);
    font-weight: 700;
}

.full-width-card {
    grid-column: span 2;
    flex-direction: row;
    align-items: center;
    gap: 32px;
}

.pill-tags-row {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 14px;
}

.pill-tag {
    padding: 6px 14px;
    border-radius: var(--radius-full);
    background: var(--pill-tag-bg);
    border: 1px solid var(--pill-tag-border);
    color: var(--accent-cyan);
    font-size: 0.82rem;
    font-weight: 600;
}

/* ==========================================================================
   Clinical Vital Simulator Section
   ========================================================================== */
.simulator-section {
    padding: 100px 0;
}

.simulator-card {
    padding: 40px;
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 40px;
}

.simulator-presets-bar {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 24px;
    flex-wrap: wrap;
}

.presets-label {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-muted);
}

.preset-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.preset-chip {
    padding: 6px 12px;
    border-radius: var(--radius-full);
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    color: var(--text-muted);
    font-size: 0.8rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.preset-chip:hover {
    border-color: var(--accent-cyan);
    color: var(--text-color);
}

.preset-chip.active {
    background: var(--preset-active-bg);
    border-color: var(--accent-cyan);
    color: var(--accent-cyan);
    font-weight: 600;
}

.inputs-grid {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.input-group {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: var(--radius-md);
    padding: 20px;
}

.input-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 12px;
}

.pulse-header {
    margin-top: 12px;
}

.input-header label {
    font-family: var(--font-heading);
    font-weight: 600;
    font-size: 0.95rem;
    color: var(--text-color);
}

.unit-toggle {
    display: flex;
    background: var(--unit-toggle-bg);
    border-radius: var(--radius-sm);
    padding: 2px;
    border: 1px solid var(--card-border);
}

.unit-btn {
    padding: 3px 10px;
    border-radius: 6px;
    border: none;
    background: transparent;
    color: var(--text-muted);
    font-size: 0.78rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.unit-btn.active {
    background: var(--primary-teal);
    color: var(--btn-primary-text);
}

.field-wrapper {
    display: flex;
    align-items: center;
    background: var(--field-bg);
    border: 1px solid var(--card-border);
    border-radius: var(--radius-sm);
    padding: 8px 14px;
    transition: border-color var(--transition-fast);
}

.field-wrapper:focus-within {
    border-color: var(--accent-cyan);
}

.field-wrapper input {
    width: 100%;
    background: transparent;
    border: none;
    color: var(--text-color);
    font-family: var(--font-mono);
    font-size: 1.3rem;
    font-weight: 600;
    outline: none;
}

.field-unit {
    color: var(--text-dim);
    font-size: 0.85rem;
    font-weight: 600;
    margin-left: 8px;
}

.meal-context-chips {
    display: flex;
    gap: 8px;
    margin-top: 14px;
}

.meal-chip {
    padding: 5px 12px;
    border-radius: var(--radius-full);
    border: 1px solid var(--card-border);
    background: transparent;
    color: var(--text-muted);
    font-size: 0.8rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.meal-chip.active {
    background: var(--preset-active-bg);
    border-color: var(--accent-cyan);
    color: var(--accent-cyan);
}

.bp-dual-fields {
    display: flex;
    align-items: center;
    gap: 12px;
}

.bp-slash {
    font-family: var(--font-mono);
    font-size: 1.5rem;
    color: var(--text-dim);
}

/* Simulator Output Deck */
.simulator-results-deck {
    display: flex;
    flex-direction: column;
    gap: 20px;
    justify-content: center;
}

.result-tile {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: var(--radius-md);
    padding: 24px;
    display: flex;
    flex-direction: column;
    gap: 12px;
    transition: all var(--transition-smooth);
}

.result-category {
    font-size: 0.8rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-dim);
}

.result-status-badge {
    display: inline-block;
    padding: 8px 16px;
    border-radius: var(--radius-md);
    font-family: var(--font-heading);
    font-size: 1.15rem;
    font-weight: 700;
    background: var(--status-normal-bg);
    border: 1px solid var(--status-normal-border);
    color: var(--status-normal);
}

.result-meta {
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 0.9rem;
    padding: 8px 0;
    border-top: 1px solid var(--card-border);
    border-bottom: 1px solid var(--card-border);
}

.meta-label {
    color: var(--text-muted);
}

.meta-value {
    font-family: var(--font-mono);
    font-weight: 600;
    color: var(--text-color);
}

.result-guideline {
    font-size: 0.88rem;
    color: var(--text-muted);
    line-height: 1.5;
}

/* Status modifier classes */
.result-status-badge.status-elevated {
    background: var(--status-elevated-bg);
    border-color: var(--status-elevated-border);
    color: var(--status-elevated);
}

.result-status-badge.status-stage1 {
    background: var(--status-stage1-bg);
    border-color: var(--status-stage1-border);
    color: var(--status-stage1);
}

.result-status-badge.status-crisis {
    background: var(--status-crisis-bg);
    border-color: var(--status-crisis-border);
    color: var(--status-crisis);
}

/* ==========================================================================
   Gallery Section
   ========================================================================== */
.gallery-section {
    padding: 100px 0;
}

.gallery-tabs {
    display: flex;
    justify-content: center;
    gap: 12px;
    margin-bottom: 32px;
    flex-wrap: wrap;
}

.gallery-tab-btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 12px 20px;
    border-radius: var(--radius-full);
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    color: var(--text-muted);
    font-family: var(--font-primary);
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.tab-index {
    font-family: var(--font-mono);
    font-size: 0.78rem;
    color: var(--text-dim);
}

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

.gallery-tab-btn.active {
    background: var(--preset-active-bg);
    border-color: var(--accent-cyan);
    color: var(--accent-cyan);
}

.gallery-tab-btn.active .tab-index {
    color: var(--accent-cyan);
}

.gallery-viewport-card {
    max-width: 820px;
    margin: 0 auto;
    overflow: hidden;
    padding: 16px;
}

.gallery-img-container {
    position: relative;
    border-radius: var(--radius-md);
    overflow: hidden;
    background: var(--gallery-container-bg);
    min-height: 480px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.gallery-img {
    width: 100%;
    max-height: 720px;
    object-fit: contain;
    display: block;
    transition: opacity 0.3s ease;
}

.gallery-caption-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 24px;
    background: var(--gallery-caption-bg);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
}

.gallery-caption-overlay h3 {
    font-size: 1.25rem;
    margin-bottom: 6px;
    color: var(--gallery-caption-title);
}

.gallery-caption-overlay p {
    font-size: 0.9rem;
    color: var(--gallery-caption-desc);
    max-width: 680px;
}

/* ==========================================================================
   Sovereign Privacy Pillars
   ========================================================================== */
.security-pillars-section {
    padding: 100px 0;
}

.pillars-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.pillar-card {
    padding: 36px;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

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

.pillar-icon {
    font-size: 2.2rem;
}

.pillar-card h3 {
    font-size: 1.25rem;
}

.pillar-card p {
    color: var(--text-muted);
    font-size: 0.92rem;
    line-height: 1.6;
}

/* ==========================================================================
   Intrepid App Family Showcase
   ========================================================================== */
.app-family-showcase {
    padding: 100px 0;
}

.family-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
}

.family-card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: var(--radius-lg);
    padding: 24px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    transition: all var(--transition-fast);
}

.family-card:hover {
    border-color: var(--accent-cyan);
    transform: translateY(-3px);
}

.family-card.current-app {
    border-color: var(--accent-cyan);
    background: linear-gradient(135deg, hsl(var(--accent-cyan-hsl) / 0.04), hsl(var(--primary-color-hsl) / 0.08));
}

.family-card-header {
    display: flex;
    align-items: center;
    gap: 14px;
    margin-bottom: 14px;
}

.family-app-icon {
    width: 44px;
    height: 44px;
    border-radius: 10px;
    object-fit: cover;
}

.family-app-info h3 {
    font-size: 1.05rem;
    font-weight: 700;
}

.family-app-domain {
    font-size: 0.8rem;
    color: var(--text-muted);
}

.family-badge-active {
    margin-left: auto;
    padding: 4px 10px;
    border-radius: var(--radius-full);
    background: var(--preset-active-bg);
    border: 1px solid var(--promo-badge-border);
    color: var(--accent-cyan);
    font-size: 0.75rem;
    font-weight: 700;
}

.family-app-desc {
    font-size: 0.88rem;
    color: var(--text-muted);
    margin-bottom: 20px;
    line-height: 1.5;
}

.family-visit-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: var(--accent-cyan);
    font-size: 0.85rem;
    font-weight: 600;
    text-decoration: none;
    transition: color var(--transition-fast);
}

.family-visit-link:hover {
    color: var(--primary-teal-light);
}

/* ==========================================================================
   6-Parameter Mandatory Footer Layout
   ========================================================================== */
.footer {
    padding: 80px 0 40px;
    background: var(--footer-bg);
    border-top: 1px solid var(--card-border);
}

.footer-top {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    flex-wrap: wrap;
    gap: 40px;
    width: 100%;
    margin-bottom: 60px;
}

/* Parameter 1 & Parameter 6 */
.footer-brand {
    display: flex;
    flex-direction: column;
    gap: 16px;
    width: 320px;
    max-width: 320px;
    flex: 0 0 320px;
}

.footer-tagline {
    font-size: 0.92rem;
    color: var(--text-muted);
    line-height: 1.6;
    margin: 0;
}

/* Parameter 6: Developer Card */
.developer-card {
    padding: 14px 18px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    gap: 14px;
    margin-top: 8px;
}

.dev-avatar {
    width: 38px;
    height: 38px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary-teal), var(--accent-cyan));
    color: var(--btn-primary-text);
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.88rem;
    box-shadow: 0 4px 10px var(--accent-glow);
}

.dev-name {
    font-size: 0.95rem;
    font-weight: 700;
    margin-bottom: 2px;
}

.dev-role {
    font-size: 0.78rem;
    color: var(--text-muted);
    margin-bottom: 4px;
}

.dev-email {
    color: var(--accent-cyan);
    font-size: 0.82rem;
    text-decoration: none;
    font-weight: 600;
}

/* Parameters 2, 3, 4: Grid Layout */
.footer-links {
    flex: 1;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
    min-width: 300px;
}

.footer-column h4 {
    font-size: 0.95rem;
    font-weight: 700;
    margin-bottom: 18px;
    color: var(--text-color);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

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

.footer-column a {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.88rem;
    transition: color var(--transition-fast);
}

.footer-column a:hover {
    color: var(--accent-cyan);
}

.footer-meta-tag {
    font-size: 0.8rem;
    color: var(--text-dim);
}

/* Parameter 5: Copyright */
.footer-bottom {
    padding-top: 28px;
    border-top: 1px solid var(--card-border);
    font-size: 0.85rem;
    color: var(--text-muted);
    text-align: center;
}

/* ==========================================================================
   Responsive Breakpoints
   ========================================================================== */
@media (max-width: 992px) {
    .hero-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }

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

    .full-width-card {
        grid-column: span 1;
        flex-direction: column;
        align-items: flex-start;
    }

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

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

    .footer-top {
        flex-direction: column;
    }

    .footer-brand {
        width: 100%;
        max-width: 100%;
        flex: auto;
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
    }

    .hero-section {
        padding: 110px 0 60px;
    }

    .hero-title {
        font-size: 2.4rem;
    }

    .hero-stats {
        flex-direction: column;
        align-items: flex-start;
        gap: 14px;
    }

    .stat-divider {
        display: none;
    }

    .footer-links {
        grid-template-columns: 1fr;
        gap: 28px;
    }
}