/* ==========================================================================
   DUNES CHAT CUSTOM DESIGN SYSTEM & DESIGN STYLES
   Bespoke Dark Desert Theme (Amber/Slate)
   ========================================================================== */

/* 1. CSS Custom Variables & Root Settings */
:root {
    /* Color Tokens (Dunes Official App Palette) */
    --color-bg: #0D1117;
    --color-bg-secondary: #161B22;
    --color-border: #21303D;
    
    /* Dunes Sunset Amber Accent Palette */
    --color-accent: #F5A623;
    --color-accent-dark: #C7831A;
    --color-accent-light: #FFCA5C;
    --color-accent-gradient: linear-gradient(135deg, #F5A623 0%, #E8722A 100%);
    
    /* Bubble Colors */
    --color-bubble-sent: #1A4F6E;
    --color-bubble-received: #1E2C3A;
    
    /* UI Text Colors */
    --color-text-primary: #E8EBF0;
    --color-text-secondary: #8B9DC3;
    --color-text-muted: #4A5568;
    --color-online: #4CAF50;
    --color-danger: #EF5350;
    
    /* Styling & Glassmorphic Shadows */
    --glass-bg: rgba(22, 27, 34, 0.7);
    --glass-border: rgba(45, 63, 80, 0.4);
    --glass-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.5);
    --glow-amber: 0 0 20px rgba(245, 166, 35, 0.25);
    --glow-amber-strong: 0 0 35px rgba(245, 166, 35, 0.55);
    
    /* Layout Constants */
    --font-heading: 'Outfit', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    --font-body: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    --transition-smooth: all 0.35s cubic-bezier(0.25, 0.8, 0.25, 1);
    --max-width: 1200px;
}

/* 2. Global Resets & Document Configuration */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
    background-color: var(--color-bg);
}

body {
    font-family: var(--font-body);
    background-color: var(--color-bg);
    color: var(--color-text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

/* Scrollbar Styles */
::-webkit-scrollbar {
    width: 10px;
}
::-webkit-scrollbar-track {
    background: var(--color-bg);
}
::-webkit-scrollbar-thumb {
    background: var(--color-border);
    border-radius: 5px;
}
::-webkit-scrollbar-thumb:hover {
    background: var(--color-accent-dark);
}

/* Selections */
::selection {
    background: var(--color-accent);
    color: var(--color-bg);
}

/* 3. Helper Classes & Typography */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    letter-spacing: -0.02em;
    color: var(--color-text-primary);
}

a {
    color: var(--color-accent);
    text-decoration: none;
    transition: var(--transition-smooth);
}

a:hover {
    color: var(--color-accent-light);
}

code {
    font-family: Consolas, Monaco, 'Andale Mono', 'Ubuntu Mono', monospace;
    background: rgba(33, 48, 61, 0.4);
    border: 1px solid var(--color-border);
    padding: 2px 6px;
    border-radius: 4px;
    color: var(--color-accent-light);
    font-size: 0.9em;
}

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

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

.section {
    padding: 100px 0;
    position: relative;
    z-index: 2;
}

.section-header {
    text-align: center;
    max-width: 700px;
    margin: 0 auto 60px;
}

.section-title {
    font-size: 2.5rem;
    margin-bottom: 16px;
    background: linear-gradient(180deg, #FFFFFF 0%, #CBD5E1 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.section-desc {
    font-size: 1.15rem;
    color: var(--color-text-secondary);
}

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

/* 4. Ambient Desert Atmosphere */
.bg-wrapper {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    overflow: hidden;
    pointer-events: none;
    z-index: 0;
}

.desert-sky {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at 70% 20%, rgba(245, 166, 35, 0.03) 0%, transparent 60%),
                radial-gradient(circle at 10% 80%, rgba(232, 114, 42, 0.02) 0%, transparent 50%);
    pointer-events: none;
    z-index: 1;
}

.ambient-sand-glow {
    position: absolute;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(245, 166, 35, 0.05) 0%, transparent 70%);
    filter: blur(80px);
    pointer-events: none;
    z-index: 1;
    top: -200px;
    left: -200px;
    animation: slow-float 20s infinite alternate ease-in-out;
}

@keyframes slow-float {
    0% { transform: translate(0, 0) scale(1); }
    100% { transform: translate(150px, 100px) scale(1.2); }
}

/* 5. Buttons & Interactive Controls */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    font-family: var(--font-heading);
    font-weight: 600;
    font-size: 1rem;
    padding: 14px 28px;
    border-radius: 8px;
    border: none;
    cursor: pointer;
    transition: var(--transition-smooth);
}

.btn-sm {
    padding: 10px 20px;
    font-size: 0.9rem;
}

.btn-lg {
    padding: 16px 36px;
    font-size: 1.1rem;
}

.btn-primary {
    background: var(--color-accent-gradient);
    color: #000000;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--glow-amber-strong);
    color: #000000;
}

.btn-primary:active {
    transform: translateY(0);
}

.btn-secondary {
    background: rgba(33, 48, 61, 0.4);
    color: var(--color-text-primary);
    border: 1px solid var(--color-border);
}

.btn-secondary:hover {
    background: rgba(33, 48, 61, 0.7);
    border-color: var(--color-accent);
    color: var(--color-accent-light);
    transform: translateY(-2px);
}

.btn-glow {
    box-shadow: var(--glow-amber);
}

.btn-text {
    background: none;
    border: none;
    color: var(--color-accent);
    cursor: pointer;
    font-family: var(--font-heading);
    font-weight: 600;
    transition: var(--transition-smooth);
}

.btn-text:hover {
    color: var(--color-accent-light);
    text-shadow: 0 0 8px rgba(245, 166, 35, 0.4);
}

.icon-svg {
    width: 20px;
    height: 20px;
}

/* 6. Header & Navigation Styles */
.glass-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background: rgba(13, 17, 23, 0.75);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--glass-border);
    transition: var(--transition-smooth);
}

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

.brand-logo {
    display: flex;
    align-items: center;
    gap: 12px;
}

.brand-icon {
    width: 32px;
    height: 32px;
    border-radius: 8px;
    box-shadow: var(--glow-amber);
}

.brand-text {
    font-family: var(--font-heading);
    font-weight: 800;
    font-size: 1.3rem;
    letter-spacing: 0.05em;
    color: var(--color-text-primary);
}

.desktop-nav {
    display: flex;
    gap: 32px;
}

.nav-link {
    color: var(--color-text-secondary);
    font-weight: 500;
    font-size: 0.95rem;
    position: relative;
    padding: 6px 0;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-accent-gradient);
    transition: var(--transition-smooth);
}

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

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

.mobile-toggle {
    display: none;
    flex-direction: column;
    gap: 6px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
    z-index: 1010;
}

.mobile-toggle .bar {
    width: 24px;
    height: 2px;
    background-color: var(--color-text-primary);
    transition: var(--transition-smooth);
}

/* Mobile Toggle Active State Animation */
.mobile-toggle.active .bar:nth-child(1) {
    transform: translateY(8px) rotate(45deg);
    background-color: var(--color-accent);
}
.mobile-toggle.active .bar:nth-child(2) {
    opacity: 0;
}
.mobile-toggle.active .bar:nth-child(3) {
    transform: translateY(-8px) rotate(-45deg);
    background-color: var(--color-accent);
}

/* Mobile Drawer */
.mobile-drawer {
    position: fixed;
    top: 0;
    right: 0;
    width: 300px;
    height: 100%;
    background: rgba(13, 17, 23, 0.98);
    backdrop-filter: blur(24px);
    border-left: 1px solid var(--color-border);
    z-index: 990;
    padding: 100px 32px 32px;
    transform: translateX(100%);
    transition: transform 0.3s ease-in-out;
}

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

.mobile-nav {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.mobile-link {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--color-text-secondary);
}

.mobile-link:hover {
    color: var(--color-accent);
    padding-left: 8px;
}

.mobile-btn {
    margin-top: 24px;
    width: 100%;
}

/* 7. Hero Section Design */
.hero-section {
    padding: 160px 0 100px;
    position: relative;
    overflow: hidden;
}

.hero-container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 24px;
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
    gap: 48px;
    align-items: center;
}

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

.badge-new {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(245, 166, 35, 0.08);
    border: 1px solid rgba(245, 166, 35, 0.2);
    padding: 6px 14px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--color-accent-light);
    margin-bottom: 24px;
}

.badge-pulse {
    width: 6px;
    height: 6px;
    background-color: var(--color-accent);
    border-radius: 50%;
    box-shadow: 0 0 8px var(--color-accent);
    animation: heartbeat 2s infinite;
}

@keyframes heartbeat {
    0% { transform: scale(1); box-shadow: 0 0 0 0 rgba(245, 166, 35, 0.7); }
    70% { transform: scale(1.1); box-shadow: 0 0 0 6px rgba(245, 166, 35, 0); }
    100% { transform: scale(1); box-shadow: 0 0 0 0 rgba(245, 166, 35, 0); }
}

.hero-title {
    font-size: 3.8rem;
    line-height: 1.1;
    margin-bottom: 24px;
}

.hero-subtitle {
    font-size: 1.15rem;
    color: var(--color-text-secondary);
    margin-bottom: 36px;
    max-width: 580px;
}

.hero-actions {
    display: flex;
    gap: 16px;
    margin-bottom: 48px;
    flex-wrap: wrap;
}

.hero-stats {
    display: flex;
    align-items: center;
    gap: 24px;
}

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

.stat-val {
    font-family: var(--font-heading);
    font-size: 1.6rem;
    font-weight: 800;
    color: var(--color-accent-light);
}

.stat-lbl {
    font-size: 0.8rem;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.stat-divider {
    width: 1px;
    height: 30px;
    background-color: var(--color-border);
}

/* 8. Glassmorphic Mockup Frame Styles */
.hero-visual {
    display: flex;
    justify-content: center;
    align-items: center;
}

.mockup-frame {
    width: 320px;
    max-width: 100%;
    height: 640px;
    background: var(--glass-bg);
    border: 3px solid var(--glass-border);
    border-radius: 40px;
    box-shadow: var(--glass-shadow), var(--glow-amber);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    position: relative;
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
}

.mockup-header {
    background: rgba(13, 17, 23, 0.4);
    border-bottom: 1px solid var(--color-border);
    padding: 12px 16px 8px;
    position: relative;
}

.mockup-camera {
    width: 60px;
    height: 18px;
    background: #000;
    border-radius: 10px;
    position: absolute;
    top: 4px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 10;
}

.mockup-status-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.75rem;
    color: var(--color-text-secondary);
    margin-bottom: 12px;
}

.mockup-indicators {
    display: flex;
    gap: 4px;
    align-items: center;
}

.mockup-signal, .mockup-wifi, .mockup-battery {
    width: 10px;
    height: 10px;
    background-color: var(--color-text-secondary);
    border-radius: 2px;
}

.mockup-battery {
    width: 16px;
    height: 8px;
}

.mockup-app-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.mockup-app-info {
    display: flex;
    align-items: center;
    gap: 10px;
}

.mockup-avatar {
    width: 32px;
    height: 32px;
    background: var(--color-accent-gradient);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 0.9rem;
    color: #000000;
}

.mockup-username {
    font-size: 0.85rem;
    font-weight: 600;
}

.mockup-online-status {
    font-size: 0.7rem;
    color: var(--color-text-secondary);
    display: flex;
    align-items: center;
    gap: 4px;
}

.status-dot {
    width: 6px;
    height: 6px;
    background-color: var(--color-online);
    border-radius: 50%;
}

.mockup-call-icons {
    display: flex;
    gap: 12px;
}

.mockup-call-icons svg {
    width: 16px;
    height: 16px;
    color: var(--color-text-secondary);
    cursor: pointer;
}

.mockup-chat-area {
    flex: 1;
    padding: 16px;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.mockup-date {
    text-align: center;
    font-size: 0.65rem;
    color: var(--color-text-muted);
    letter-spacing: 0.1em;
    margin: 8px 0;
}

.mock-bubble {
    max-width: 80%;
    padding: 10px 14px;
    font-size: 0.8rem;
    line-height: 1.4;
    position: relative;
}

.mock-bubble p {
    margin-bottom: 4px;
}

.bubble-time {
    display: block;
    font-size: 0.6rem;
    color: var(--color-text-muted);
    text-align: right;
}

.mock-bubble.received {
    align-self: flex-start;
    background-color: var(--color-bubble-received);
    border-radius: 16px 16px 16px 4px;
    border: 1px solid var(--color-border);
    color: var(--color-text-primary);
}

.mock-bubble.sent {
    align-self: flex-end;
    background-color: var(--color-bubble-sent);
    border-radius: 16px 16px 4px 16px;
    color: var(--color-text-primary);
}

.mockup-footer {
    padding: 12px 16px;
    background: rgba(13, 17, 23, 0.4);
    border-top: 1px solid var(--color-border);
    display: flex;
    gap: 10px;
    align-items: center;
}

.mockup-input {
    flex: 1;
    background: rgba(30, 44, 58, 0.5);
    border: 1px solid var(--color-border);
    border-radius: 20px;
    padding: 8px 16px;
    font-size: 0.75rem;
    color: var(--color-text-muted);
}

.mockup-send-btn {
    width: 32px;
    height: 32px;
    background-color: var(--color-accent);
    border: none;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
}

.mockup-send-btn svg {
    width: 14px;
    height: 14px;
    color: #000;
    margin-left: 2px;
}

/* 9. Feature Cards & Layout Grid */
.glass-card {
    background: var(--glass-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    box-shadow: var(--glass-shadow);
    transition: var(--transition-smooth);
}

.glass-card:hover {
    border-color: rgba(245, 166, 35, 0.25);
    box-shadow: var(--glass-shadow), 0 0 25px rgba(245, 166, 35, 0.05);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.feature-card {
    padding: 40px 32px;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
}

.feature-card:hover {
    transform: translateY(-6px);
}

.feature-icon-wrapper {
    width: 56px;
    height: 56px;
    background: rgba(245, 166, 35, 0.08);
    border: 1px solid rgba(245, 166, 35, 0.2);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 24px;
    color: var(--color-accent);
    transition: var(--transition-smooth);
}

.feature-card:hover .feature-icon-wrapper {
    background: var(--color-accent-gradient);
    color: #000000;
    box-shadow: var(--glow-amber);
}

.feature-icon {
    width: 24px;
    height: 24px;
}

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

.feature-card p {
    color: var(--color-text-secondary);
    font-size: 0.95rem;
}

/* 10. Security Pulse & Graphic Elements */
.security-section {
    background: radial-gradient(circle at 10% 50%, rgba(24, 34, 46, 0.4) 0%, transparent 60%);
    border-top: 1px solid var(--color-border);
    border-bottom: 1px solid var(--color-border);
}

.security-grid {
    display: grid;
    grid-template-columns: 0.9fr 1.1fr;
    gap: 60px;
    align-items: center;
}

.security-visual {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 380px;
    overflow: hidden; /* Safeguard: prevents pulsing rings from creating horizontal slack on narrow viewports */
}

.shield-container {
    width: 140px;
    height: 140px;
    position: relative;
}

.shield-graphic {
    position: absolute;
    top: 0;
    left: 0;
    width: 140px;
    height: 140px;
    background: var(--color-accent-gradient);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--glow-amber-strong);
    color: #000000;
    z-index: 4;
}

.shield-graphic svg {
    width: 64px;
    height: 64px;
}

.pulse-ring {
    position: absolute;
    top: -50px;
    left: -50px;
    width: 240px;
    height: 240px;
    border: 1px solid rgba(245, 166, 35, 0.3);
    border-radius: 50%;
    z-index: 1;
    animation: ring-pulse 4s linear infinite;
    opacity: 0;
}

.ring-2 {
    animation-delay: 1.3s;
}

.ring-3 {
    animation-delay: 2.6s;
}

@keyframes ring-pulse {
    0% { transform: scale(0.6); opacity: 0; }
    50% { opacity: 0.5; }
    100% { transform: scale(1.3); opacity: 0; }
}

.accent-title {
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 0.9rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--color-accent);
    margin-bottom: 12px;
    display: block;
}

.security-specs-list {
    list-style: none;
    margin-top: 36px;
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.security-specs-list li {
    display: flex;
    gap: 16px;
    align-items: flex-start;
}

.spec-bullet {
    width: 28px;
    height: 28px;
    background: rgba(76, 175, 80, 0.08);
    border: 1px solid rgba(76, 175, 80, 0.2);
    border-radius: 50%;
    color: var(--color-online);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.9rem;
    font-weight: 700;
    flex-shrink: 0;
}

.security-specs-list h4 {
    font-size: 1.1rem;
    margin-bottom: 4px;
}

.security-specs-list p {
    color: var(--color-text-secondary);
    font-size: 0.95rem;
}

/* 11. Interactive Encryption Simulator (Removed) */

.badge {
    display: inline-block;
    padding: 4px 10px;
    font-size: 0.7rem;
    font-weight: 700;
    border-radius: 4px;
}

.badge-success {
    background-color: rgba(76, 175, 80, 0.08);
    border: 1px solid rgba(76, 175, 80, 0.2);
    color: var(--color-online);
}

/* 12. App Download Hub Styles */
.download-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    align-items: start;
}

.release-card {
    padding: 32px;
    margin: 28px 0 36px;
    border-color: rgba(245, 166, 35, 0.15);
}

.release-main-info {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 8px;
}

.release-tag {
    background: rgba(76, 175, 80, 0.08);
    border: 1px solid rgba(76, 175, 80, 0.2);
    color: var(--color-online);
    font-size: 0.75rem;
    font-weight: 700;
    padding: 4px 10px;
    border-radius: 4px;
    text-transform: uppercase;
}

.release-version {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 800;
}

.release-metadata {
    font-size: 0.85rem;
    color: var(--color-text-secondary);
    display: flex;
    gap: 8px;
    margin-bottom: 20px;
}

.release-notes {
    border-top: 1px solid var(--color-border);
    padding-top: 18px;
    font-size: 0.9rem;
}

.release-notes strong {
    display: block;
    margin-bottom: 8px;
    color: var(--color-text-primary);
}

.release-notes p {
    color: var(--color-text-secondary);
}

.download-cta-buttons {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

.download-instructions {
    padding: 40px;
}

.download-instructions h3 {
    font-size: 1.6rem;
    margin-bottom: 12px;
}

.guide-intro {
    color: var(--color-text-secondary);
    margin-bottom: 32px;
}

.step-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 28px;
}

.step-list li {
    display: flex;
    gap: 20px;
    align-items: flex-start;
}

.step-num {
    width: 32px;
    height: 32px;
    background: var(--color-accent-gradient);
    border-radius: 50%;
    color: #000000;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-heading);
    font-weight: 800;
    font-size: 1rem;
    flex-shrink: 0;
    box-shadow: var(--glow-amber);
}

.step-list h4 {
    font-size: 1.1rem;
    margin-bottom: 6px;
}

.step-list p {
    color: var(--color-text-secondary);
    font-size: 0.9rem;
}

/* 13. Accordion FAQs Styles */
.faq-container {
    max-width: 800px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.faq-item {
    border: 1px solid var(--glass-border);
    overflow: hidden;
}

.faq-question {
    width: 100%;
    background: transparent;
    border: none;
    padding: 24px;
    text-align: left;
    display: flex;
    justify-content: space-between;
    align-items: center;
    cursor: pointer;
    font-family: var(--font-heading);
    font-size: 1.15rem;
    font-weight: 600;
    color: var(--color-text-primary);
}

.faq-icon {
    font-size: 1.4rem;
    color: var(--color-accent);
    transition: var(--transition-smooth);
}

.faq-item.active .faq-icon {
    transform: rotate(45deg);
    color: var(--color-danger);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    padding: 0 24px;
    transition: all 0.3s ease-out;
}

.faq-item.active .faq-answer {
    padding: 0 24px 24px;
    max-height: 500px; /* arbitrary height to slide down */
}

.faq-answer p {
    color: var(--color-text-secondary);
    font-size: 0.95rem;
    line-height: 1.6;
}

/* 14. Site Footer */
.site-footer {
    background-color: #080B0F;
    border-top: 1px solid var(--color-border);
    padding: 80px 0 40px;
    position: relative;
    z-index: 2;
}

.footer-top {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 60px;
    margin-bottom: 60px;
}

.footer-brand p {
    color: var(--color-text-secondary);
    font-size: 0.95rem;
    margin-top: 16px;
    max-width: 320px;
}

.footer-links {
    display: flex;
    justify-content: space-between;
    gap: 40px;
}

.link-group {
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.link-group h4 {
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--color-text-muted);
    margin-bottom: 8px;
}

.link-group a {
    color: var(--color-text-secondary);
    font-size: 0.95rem;
}

.link-group a:hover {
    color: var(--color-accent);
}

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

.footer-meta {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--color-text-secondary);
}

/* 15. Animation Timers & Entrance Classes */
.animate-fade-in {
    opacity: 0;
    animation: fade-in 1s forwards ease-out 0.2s;
}

.animate-slide-up {
    opacity: 0;
    transform: translateY(24px);
    animation: slide-up 0.8s forwards cubic-bezier(0.25, 0.8, 0.25, 1);
}

.animate-slide-up:nth-child(2) { animation-delay: 0.15s; }
.animate-slide-up:nth-child(3) { animation-delay: 0.3s; }
.animate-slide-up:nth-child(4) { animation-delay: 0.45s; }

.animate-fade-in-right {
    opacity: 0;
    transform: translateX(36px);
    animation: fade-in-right 1s forwards cubic-bezier(0.25, 0.8, 0.25, 1) 0.5s;
}

@keyframes fade-in {
    to { opacity: 1; }
}

@keyframes slide-up {
    to { opacity: 1; transform: translateY(0); }
}

@keyframes fade-in-right {
    to { opacity: 1; transform: translateX(0); }
}

/* 16. Comprehensive Media Queries (Responsive Breakpoints) */

/* Global HTML overflow safeguard */
html {
    overflow-x: hidden;
    width: 100%;
}

/* Wide Desktops and Laptops */
@media (max-width: 1200px) {
    .container {
        padding: 0 32px;
    }
}

/* Tablets (landscape and portrait) */
@media (max-width: 991px) {
    .section {
        padding: 80px 0;
    }
    
    .hero-container {
        grid-template-columns: 1fr;
        gap: 60px;
        text-align: center;
    }
    
    .hero-content {
        align-items: center;
    }
    
    .hero-actions {
        justify-content: center;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
        gap: 32px;
    }
    
    .security-grid {
        grid-template-columns: 1fr;
        gap: 48px;
    }
    
    .security-visual {
        order: -1;
        height: 280px;
    }
    
    .simulator-wrapper {
        grid-template-columns: 1fr;
        gap: 24px;
    }
    
    .sim-controls {
        padding: 16px 0;
    }
    
    .download-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .footer-top {
        grid-template-columns: 1fr;
        gap: 48px;
    }
    
    .footer-brand p {
        max-width: 100%;
    }
}

/* Small Tablets & Large Phones */
@media (max-width: 768px) {
    .desktop-nav, .header-cta {
        display: none;
    }
    
    .mobile-toggle {
        display: flex;
    }
    
    .hero-title {
        font-size: clamp(2rem, 7vw, 2.8rem);
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .faq-question {
        padding: 20px;
        font-size: 1.05rem;
    }
    
    .faq-answer p {
        font-size: 0.9rem;
    }

    /* Centering & stacking stats on mobile to prevent overflow */
    .hero-stats {
        flex-direction: column;
        align-items: center;
        gap: 16px;
        width: 100%;
    }
    
    .stat-divider {
        display: none;
    }
    
    .stat-item {
        align-items: center;
    }
}

/* Phones */
@media (max-width: 480px) {
    .hero-title {
        font-size: 2.2rem;
    }
    
    .hero-actions .btn {
        width: 100%;
    }
    
    .download-instructions {
        padding: 24px;
    }
    
    .footer-links {
        flex-direction: column;
        gap: 32px;
    }
    
    .footer-bottom {
        flex-direction: column;
        align-items: flex-start;
        gap: 16px;
    }
}