/* Radio Alert Landing Page
   Aesthetic: Tactical Clarity
   Deep slate + amber gold + teal accents
*/

/* ========================================
   CSS CUSTOM PROPERTIES
======================================== */
:root {
    /* Colors - matching app design system */
    --color-bg: #0c0f14;
    --color-bg-elevated: #12151c;
    --color-surface: #181c24;
    --color-surface-elevated: #1e232e;
    --color-border: rgba(255, 255, 255, 0.08);
    --color-border-strong: rgba(255, 255, 255, 0.12);
    
    /* Text */
    --color-text: #fafafa;
    --color-text-secondary: #a1a1aa;
    --color-text-tertiary: #71717a;
    
    /* Accents */
    --color-accent: #f59e0b;
    --color-accent-bright: #fbbf24;
    --color-accent-soft: rgba(245, 158, 11, 0.15);
    --color-teal: #14b8a6;
    --color-teal-soft: rgba(20, 184, 166, 0.15);
    --color-danger: #ef4444;
    --color-danger-soft: rgba(239, 68, 68, 0.15);
    
    /* Typography */
    --font-display: 'Space Grotesk', sans-serif;
    --font-body: 'DM Sans', sans-serif;
    
    /* Spacing */
    --space-xs: 4px;
    --space-sm: 8px;
    --space-md: 16px;
    --space-lg: 24px;
    --space-xl: 32px;
    --space-2xl: 48px;
    --space-3xl: 64px;
    --space-4xl: 96px;
    
    /* Radius */
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 400ms ease-out;
}

/* ========================================
   RESET & BASE
======================================== */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-body);
    font-size: 16px;
    line-height: 1.6;
    color: var(--color-text);
    background: var(--color-bg);
    overflow-x: hidden;
}

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

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

img, svg {
    display: block;
    max-width: 100%;
}

/* ========================================
   NAVIGATION
======================================== */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    padding: var(--space-md) var(--space-lg);
    background: rgba(12, 15, 20, 0.8);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--color-border);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

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

.nav-logo-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--color-accent);
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.7; transform: scale(1.1); }
}

.nav-logo-text {
    font-family: var(--font-display);
    font-weight: 600;
    font-size: 18px;
    letter-spacing: -0.02em;
}

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

.nav-links a {
    font-size: 14px;
    font-weight: 500;
    color: var(--color-text-secondary);
    transition: color var(--transition-fast);
}

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

.nav-cta {
    padding: var(--space-sm) var(--space-md);
    background: var(--color-accent);
    color: var(--color-bg) !important;
    border-radius: var(--radius-sm);
    font-weight: 600;
    transition: transform var(--transition-fast), background var(--transition-fast);
}

.nav-cta:hover {
    background: var(--color-accent-bright);
    transform: translateY(-1px);
}

/* Language Switcher */
.lang-switcher {
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 4px;
    background: var(--color-surface);
    border-radius: var(--radius-sm);
    border: 1px solid var(--color-border);
}

.lang-btn {
    padding: 6px 10px;
    font-size: 12px;
    font-weight: 600;
    color: var(--color-text-tertiary);
    background: transparent;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.lang-btn:hover {
    color: var(--color-text-secondary);
}

.lang-btn.active {
    background: var(--color-accent);
    color: var(--color-bg);
}

/* ========================================
   HERO SECTION
======================================== */
.hero {
    min-height: 100vh;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-3xl);
    align-items: center;
    padding: calc(80px + var(--space-3xl)) var(--space-lg) var(--space-3xl);
    max-width: 1400px;
    margin: 0 auto;
    position: relative;
}

.hero-bg {
    position: absolute;
    inset: 0;
    overflow: hidden;
    pointer-events: none;
}

/* ========================================
   RADIO TOWER SVG ILLUSTRATION
======================================== */
.radio-tower-svg {
    position: absolute;
    bottom: 5%;
    left: 25%;
    width: 500px;
    height: 600px;
    opacity: 0.75;
    filter: drop-shadow(0 0 30px rgba(245, 158, 11, 0.1));
}

.radio-tower-svg .tower-structure {
    filter: drop-shadow(0 0 8px rgba(245, 158, 11, 0.3));
}

.radio-tower-svg .signal-waves path {
    filter: drop-shadow(0 0 6px rgba(20, 184, 166, 0.5));
}

.hero-grid {
    position: absolute;
    inset: 0;
    background-image: 
        linear-gradient(rgba(255,255,255,0.02) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,0.02) 1px, transparent 1px);
    background-size: 60px 60px;
    mask-image: radial-gradient(ellipse 80% 80% at 30% 50%, black 20%, transparent 70%);
    -webkit-mask-image: radial-gradient(ellipse 80% 80% at 30% 50%, black 20%, transparent 70%);
}

.hero-content {
    position: relative;
    z-index: 1;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-xs) var(--space-md);
    background: var(--color-accent-soft);
    border: 1px solid rgba(245, 158, 11, 0.2);
    border-radius: 100px;
    font-size: 13px;
    font-weight: 600;
    color: var(--color-accent);
    margin-bottom: var(--space-lg);
}

.hero-badge-dot {
    width: 6px;
    height: 6px;
    background: var(--color-accent);
    border-radius: 50%;
    animation: blink 1.5s ease-in-out infinite;
}

@keyframes blink {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.3; }
}

.hero-title {
    font-family: var(--font-display);
    font-size: clamp(48px, 6vw, 72px);
    font-weight: 700;
    line-height: 1.05;
    letter-spacing: -0.03em;
    margin-bottom: var(--space-lg);
}

.hero-title-line {
    display: block;
}

.hero-title-accent {
    color: var(--color-accent);
}

.hero-description {
    font-size: 18px;
    color: var(--color-text-secondary);
    max-width: 480px;
    margin-bottom: var(--space-xl);
    line-height: 1.7;
}

.hero-actions {
    display: flex;
    gap: var(--space-md);
    margin-bottom: var(--space-2xl);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-md) var(--space-lg);
    font-size: 15px;
    font-weight: 600;
    border-radius: var(--radius-md);
    transition: all var(--transition-base);
}

.btn-primary {
    background: var(--color-accent);
    color: var(--color-bg);
}

.btn-primary:hover {
    background: var(--color-accent-bright);
    transform: translateY(-2px);
}

.btn-ghost {
    background: var(--color-surface);
    border: 1px solid var(--color-border-strong);
    color: var(--color-text);
}

.btn-ghost:hover {
    background: var(--color-surface-elevated);
    border-color: var(--color-accent);
}

/* Hero Stats */
.hero-stats {
    display: flex;
    align-items: center;
    gap: var(--space-lg);
}

.hero-stat {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.hero-stat-value {
    font-family: var(--font-display);
    font-size: 28px;
    font-weight: 700;
    color: var(--color-text);
    letter-spacing: -0.02em;
}

.hero-stat-label {
    font-size: 13px;
    color: var(--color-text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.hero-stat-divider {
    width: 1px;
    height: 40px;
    background: var(--color-border);
}

/* ========================================
   PHONE MOCKUP
======================================== */
.hero-phone {
    position: relative;
    z-index: 1;
    display: flex;
    justify-content: center;
}

.phone-frame {
    width: 340px;
    height: 700px;
    background: #1a1a1a;
    border-radius: 48px;
    padding: 12px;
    position: relative;
    border: 1px solid var(--color-border-strong);
}

.phone-frame::before {
    content: '';
    position: absolute;
    inset: 4px;
    border-radius: 44px;
    border: 1px solid rgba(255,255,255,0.05);
    pointer-events: none;
}

.phone-notch {
    position: absolute;
    top: 16px;
    left: 50%;
    transform: translateX(-50%);
    width: 100px;
    height: 28px;
    background: #0c0f14;
    border-radius: 16px;
    z-index: 10;
}

.phone-screen {
    width: 100%;
    height: 100%;
    background: var(--color-bg);
    border-radius: 38px;
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

/* App Mockup Inside Phone - iOS Design Recreation */
.app-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 52px 16px 14px;
    background: var(--color-bg-elevated);
    border-bottom: 1px solid var(--color-border);
}

.app-header-left {
    display: flex;
    align-items: center;
    gap: 12px;
}

.app-header-indicator {
    width: 36px;
    height: 36px;
    background: rgba(255, 255, 255, 0.08);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.indicator-dot {
    width: 10px;
    height: 10px;
    background: var(--color-accent);
    border-radius: 50%;
    animation: pulse 2s ease-in-out infinite;
    box-shadow: 0 0 8px var(--color-accent);
}

.app-header-text {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.app-name {
    font-family: var(--font-display);
    font-size: 11px;
    font-weight: 700;
    color: var(--color-text);
}

.app-subtitle {
    font-size: 9px;
    font-weight: 600;
    color: var(--color-text-tertiary);
    letter-spacing: 0.5px;
}

.app-header-right {
    display: flex;
    align-items: center;
    gap: 10px;
}

.header-btn {
    width: 36px;
    height: 36px;
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid var(--color-border);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.header-btn:hover {
    background: rgba(255, 255, 255, 0.12);
}

.header-btn svg {
    width: 16px;
    height: 16px;
    color: var(--color-text-secondary);
}

.app-channels {
    flex: 1;
    padding: 8px;
    display: flex;
    flex-direction: column;
    gap: 2px;
    overflow-y: auto;
}

.channel-item {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 12px 14px;
    border-radius: 14px;
    background: transparent;
    cursor: pointer;
    transition: all var(--transition-fast);
    position: relative;
}

.channel-item:hover {
    background: rgba(255, 255, 255, 0.04);
}

.channel-item--selected {
    background: var(--color-surface);
}

.channel-item--streaming {
    background: var(--color-surface);
}

.channel-avatar-wrap {
    position: relative;
    width: 48px;
    height: 48px;
    flex-shrink: 0;
}

.channel-avatar {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 18px;
    color: white;
}

.streaming-ring {
    position: absolute;
    inset: -4px;
    border-radius: 50%;
    border: 2px solid var(--color-teal);
    animation: streamRing 1.5s ease-in-out infinite;
}

@keyframes streamRing {
    0%, 100% { transform: scale(1); opacity: 0.8; }
    50% { transform: scale(1.08); opacity: 0.4; }
}

.channel-info {
    flex: 1;
    min-width: 0;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.channel-name-row {
    display: flex;
    align-items: center;
    gap: 6px;
}

.channel-name {
    font-size: 14px;
    font-weight: 600;
    color: var(--color-text);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.channel-verified {
    width: 14px;
    height: 14px;
    color: var(--color-accent);
    flex-shrink: 0;
}

.channel-live {
    padding: 2px 6px;
    background: rgba(239, 68, 68, 0.15);
    color: #ef4444;
    font-size: 9px;
    font-weight: 700;
    border-radius: 4px;
    letter-spacing: 0.05em;
    flex-shrink: 0;
}

.channel-status {
    font-size: 12px;
    color: var(--color-text-secondary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.channel-action {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    border: none;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all var(--transition-fast);
    flex-shrink: 0;
}

.channel-action svg {
    width: 14px;
    height: 14px;
}

.channel-action--attach {
    background: rgba(255, 255, 255, 0.06);
    color: var(--color-text-tertiary);
}

.channel-action--attach:hover {
    background: rgba(245, 158, 11, 0.15);
    color: var(--color-accent);
}

.channel-action--attached {
    background: rgba(20, 184, 166, 0.15);
    color: var(--color-teal);
}

/* Player Footer */
.app-player {
    background: var(--color-surface);
    border-top: 1px solid var(--color-border);
    border-radius: 24px 24px 0 0;
    padding-bottom: 8px;
    box-shadow: 0 -10px 30px rgba(0, 0, 0, 0.3);
}

.player-drag-handle {
    width: 36px;
    height: 4px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 2px;
    margin: 12px auto 8px;
}

.player-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 8px 18px 12px;
}

.player-info {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.player-title {
    font-family: var(--font-display);
    font-size: 17px;
    font-weight: 700;
    color: var(--color-text);
}

.player-status {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 12px;
    font-weight: 500;
}

.player-status--streaming {
    color: var(--color-teal);
}

.player-status--streaming .status-dot {
    width: 6px;
    height: 6px;
    background: var(--color-teal);
    border-radius: 50%;
    animation: pulse 2s ease-in-out infinite;
}

.player-controls {
    display: flex;
    align-items: center;
    gap: 14px;
}

.player-waveform {
    display: flex;
    align-items: center;
    gap: 3px;
    height: 28px;
}

.player-waveform span {
    width: 3px;
    border-radius: 2px;
    background: linear-gradient(180deg, var(--color-teal), rgba(20, 184, 166, 0.3));
    transition: height 0.3s ease, transform 0.3s ease;
}

/* Static waveform heights when not streaming */
.player-waveform span:nth-child(1) { height: 10px; }
.player-waveform span:nth-child(2) { height: 16px; }
.player-waveform span:nth-child(3) { height: 22px; }
.player-waveform span:nth-child(4) { height: 16px; }
.player-waveform span:nth-child(5) { height: 12px; }

.player-waveform--active span {
    animation: wave 0.8s ease-in-out infinite;
}

.player-waveform--active span:nth-child(1) { animation-delay: 0s; }
.player-waveform--active span:nth-child(2) { animation-delay: 0.1s; }
.player-waveform--active span:nth-child(3) { animation-delay: 0.2s; }
.player-waveform--active span:nth-child(4) { animation-delay: 0.3s; }
.player-waveform--active span:nth-child(5) { animation-delay: 0.4s; }

@keyframes wave {
    0%, 100% { transform: scaleY(0.5); }
    50% { transform: scaleY(1); }
}

.player-btn {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    border: none;
    cursor: pointer;
    position: relative;
    transition: all var(--transition-fast);
}

.player-btn--stop {
    background: linear-gradient(135deg, var(--color-teal), #0d9488);
}

.player-btn--stop .btn-glow {
    position: absolute;
    inset: -4px;
    border-radius: 50%;
    border: 2px solid var(--color-teal);
    animation: btnPulse 2s ease-in-out infinite;
}

@keyframes btnPulse {
    0%, 100% { transform: scale(1); opacity: 0.6; }
    50% { transform: scale(1.1); opacity: 0.2; }
}

.player-btn--stop .btn-icon {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 14px;
    height: 14px;
    background: var(--color-bg);
    border-radius: 2px;
}

.player-btn--play {
    background: linear-gradient(135deg, var(--color-accent), #d97706);
}

.player-btn--play .btn-glow {
    display: none;
}

.player-btn--play .btn-icon {
    position: absolute;
    top: 50%;
    left: 54%;
    transform: translate(-50%, -50%);
    width: 0;
    height: 0;
    border-style: solid;
    border-width: 7px 0 7px 11px;
    border-color: transparent transparent transparent var(--color-bg);
    background: transparent;
    border-radius: 0;
}

.player-btn:hover {
    transform: scale(1.05);
}

.player-status--ready {
    color: var(--color-text-secondary);
}

/* ========================================
   FEATURES SECTION
======================================== */
.features {
    padding: var(--space-4xl) var(--space-lg);
    background: var(--color-bg-elevated);
}

.section-container {
    max-width: 1200px;
    margin: 0 auto;
}

.section-header {
    margin-bottom: var(--space-3xl);
}

.section-header--center {
    text-align: center;
}

.section-tag {
    display: inline-block;
    padding: var(--space-xs) var(--space-md);
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 100px;
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-text-secondary);
    margin-bottom: var(--space-md);
}

.section-tag--light {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.2);
}

.section-title {
    font-family: var(--font-display);
    font-size: clamp(32px, 4vw, 48px);
    font-weight: 700;
    letter-spacing: -0.02em;
    line-height: 1.1;
}

.section-description {
    font-size: 18px;
    color: var(--color-text-secondary);
    max-width: 500px;
    margin: var(--space-md) auto 0;
}

/* Features Grid */
.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-lg);
}

.feature-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

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

.feature-card--large {
    grid-column: span 2;
    grid-row: span 2;
    padding: var(--space-2xl);
}

.feature-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--space-md);
}

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

.feature-icon--stream {
    background: var(--color-teal-soft);
    color: var(--color-teal);
}

.feature-icon--transcription {
    background: var(--color-accent-soft);
    color: var(--color-accent);
}

.feature-icon--regions {
    background: rgba(59, 130, 246, 0.15);
    color: #3b82f6;
}

.feature-icon--instant {
    background: var(--color-danger-soft);
    color: var(--color-danger);
}

.feature-icon--trusted {
    background: rgba(34, 197, 94, 0.15);
    color: #22c55e;
}

.feature-icon--background {
    background: rgba(168, 85, 247, 0.15);
    color: #a855f7;
}

.feature-title {
    font-family: var(--font-display);
    font-size: 20px;
    font-weight: 600;
    margin-bottom: var(--space-sm);
    letter-spacing: -0.01em;
}

.feature-card--large .feature-title {
    font-size: 28px;
}

.feature-description {
    font-size: 14px;
    color: var(--color-text-secondary);
    line-height: 1.7;
}

.feature-card--large .feature-description {
    font-size: 16px;
    max-width: 400px;
}

/* Feature Visual - Stream Wave */
.feature-visual {
    position: absolute;
    bottom: var(--space-xl);
    right: var(--space-xl);
    left: var(--space-xl);
}

.stream-wave {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    height: 80px;
}

.stream-wave span {
    width: 8px;
    background: linear-gradient(180deg, var(--color-teal), transparent);
    border-radius: 4px;
    animation: streamWave 1.5s ease-in-out infinite;
    animation-delay: calc(var(--i) * 0.1s);
}

@keyframes streamWave {
    0%, 100% { height: 20px; }
    50% { height: 80px; }
}

/* ========================================
   HOW IT WORKS
======================================== */
.how-it-works {
    padding: var(--space-4xl) var(--space-lg);
}

.process-flow {
    display: flex;
    align-items: stretch;
    gap: 0;
    margin-top: var(--space-3xl);
}

.process-step {
    flex: 1;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    position: relative;
    transition: all var(--transition-base);
}

.process-step:hover {
    border-color: var(--color-accent);
}

.process-number {
    font-family: var(--font-display);
    font-size: 48px;
    font-weight: 700;
    color: var(--color-accent);
    opacity: 0.3;
    line-height: 1;
    margin-bottom: var(--space-md);
}

.process-content h3 {
    font-family: var(--font-display);
    font-size: 20px;
    font-weight: 600;
    margin-bottom: var(--space-sm);
}

.process-content p {
    font-size: 14px;
    color: var(--color-text-secondary);
    line-height: 1.6;
}

.process-icon {
    position: absolute;
    top: var(--space-xl);
    right: var(--space-xl);
    width: 48px;
    height: 48px;
    background: var(--color-bg);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text-secondary);
}

.process-icon svg {
    width: 24px;
    height: 24px;
}

.process-connector {
    width: 60px;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-border-strong);
}

.process-connector svg {
    width: 100%;
    height: 20px;
}

/* ========================================
   BACKGROUND MODE SECTION
======================================== */
.background-mode {
    padding: var(--space-4xl) var(--space-lg);
    background: var(--color-bg-elevated);
}

.use-cases-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-xl);
    margin-top: var(--space-3xl);
}

.use-case-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    overflow: hidden;
    transition: all var(--transition-base);
}

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

.use-case-video {
    position: relative;
    aspect-ratio: 9 / 16;
    max-height: 400px;
    background: var(--color-bg);
    overflow: hidden;
}

.video-placeholder {
    position: absolute;
    inset: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--space-md);
    background: linear-gradient(135deg, var(--color-bg) 0%, var(--color-surface) 100%);
    border: 2px dashed var(--color-border-strong);
    margin: var(--space-md);
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all var(--transition-base);
}

.video-placeholder:hover {
    border-color: var(--color-accent);
    background: linear-gradient(135deg, var(--color-bg) 0%, rgba(245, 158, 11, 0.05) 100%);
}

.video-placeholder .video-icon {
    width: 64px;
    height: 64px;
    background: var(--color-accent-soft);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-accent);
    transition: all var(--transition-base);
}

.video-placeholder:hover .video-icon {
    transform: scale(1.1);
    background: var(--color-accent);
    color: var(--color-bg);
}

.video-placeholder .video-icon svg {
    width: 24px;
    height: 24px;
    margin-left: 4px;
}

.video-placeholder .video-label {
    font-size: 12px;
    color: var(--color-text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

/* When video is added, hide placeholder */
.use-case-video video {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

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

.use-case-icon {
    width: 44px;
    height: 44px;
    background: var(--color-accent-soft);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-accent);
    margin-bottom: var(--space-md);
}

.use-case-icon svg {
    width: 22px;
    height: 22px;
}

.use-case-card:nth-child(1) .use-case-icon {
    background: rgba(168, 85, 247, 0.15);
    color: #a855f7;
}

.use-case-card:nth-child(2) .use-case-icon {
    background: rgba(239, 68, 68, 0.15);
    color: #ef4444;
}

.use-case-card:nth-child(3) .use-case-icon {
    background: rgba(59, 130, 246, 0.15);
    color: #3b82f6;
}

.use-case-content h3 {
    font-family: var(--font-display);
    font-size: 18px;
    font-weight: 600;
    margin-bottom: var(--space-sm);
    color: var(--color-text);
}

.use-case-content p {
    font-size: 14px;
    color: var(--color-text-secondary);
    line-height: 1.6;
}

/* ========================================
   DOWNLOAD SECTION
======================================== */
.download {
    padding: var(--space-4xl) var(--space-lg);
    background: linear-gradient(180deg, var(--color-bg-elevated), var(--color-bg));
    position: relative;
    overflow: hidden;
}

.download-bg {
    position: absolute;
    inset: 0;
    pointer-events: none;
}

.download-grid {
    position: absolute;
    inset: 0;
    background-image: 
        linear-gradient(rgba(245, 158, 11, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(245, 158, 11, 0.03) 1px, transparent 1px);
    background-size: 40px 40px;
    mask-image: radial-gradient(ellipse 60% 60% at 50% 50%, black 10%, transparent 60%);
    -webkit-mask-image: radial-gradient(ellipse 60% 60% at 50% 50%, black 10%, transparent 60%);
}

.download-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-3xl);
    align-items: center;
    position: relative;
    z-index: 1;
}

.download-title {
    font-family: var(--font-display);
    font-size: clamp(36px, 4vw, 52px);
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-bottom: var(--space-md);
}

.download-description {
    font-size: 18px;
    color: var(--color-text-secondary);
    line-height: 1.7;
    margin-bottom: var(--space-xl);
}

.download-buttons {
    display: flex;
    gap: var(--space-md);
    margin-bottom: var(--space-xl);
}

.store-btn {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    padding: var(--space-md) var(--space-lg);
    background: var(--color-text);
    color: var(--color-bg);
    border-radius: var(--radius-md);
    transition: all var(--transition-base);
}

.store-btn:hover {
    transform: translateY(-2px);
    background: #ffffff;
}

.store-btn svg {
    width: 28px;
    height: 28px;
}

.store-btn-text {
    display: flex;
    flex-direction: column;
    gap: 0;
}

.store-btn-label {
    font-size: 11px;
    opacity: 0.7;
}

.store-btn-store {
    font-size: 18px;
    font-weight: 600;
    line-height: 1.1;
}

.download-note {
    display: flex;
    align-items: flex-start;
    gap: var(--space-md);
    padding: var(--space-md);
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    font-size: 13px;
    color: var(--color-text-secondary);
}

.download-note svg {
    width: 20px;
    height: 20px;
    flex-shrink: 0;
    color: var(--color-accent);
}

/* Download Phone Mockup */
.download-phone {
    display: flex;
    justify-content: center;
}

.phone-frame--small {
    width: 280px;
    height: 560px;
    transform: rotate(3deg);
}

.download-app-preview {
    display: flex;
    flex-direction: column;
    height: 100%;
    padding-top: 48px;
}

.preview-alert {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    padding: var(--space-lg);
    background: var(--color-danger-soft);
    border-bottom: 1px solid var(--color-border);
}

.preview-alert-icon {
    width: 40px;
    height: 40px;
    background: var(--color-danger);
    border-radius: 50%;
    position: relative;
    animation: alertPulse 1.5s ease-in-out infinite;
}

.preview-alert-icon::before {
    content: '!';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-family: var(--font-display);
    font-size: 20px;
    font-weight: 700;
    color: white;
}

@keyframes alertPulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.05); }
}

.preview-alert-text {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.preview-alert-title {
    font-size: 14px;
    font-weight: 600;
    color: var(--color-danger);
}

.preview-alert-region {
    font-size: 12px;
    color: var(--color-text-secondary);
}

.preview-transcript {
    flex: 1;
    padding: var(--space-lg);
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.transcript-line {
    padding: var(--space-md);
    background: var(--color-surface);
    border-radius: var(--radius-md);
    font-size: 13px;
    color: var(--color-text-secondary);
    animation: fadeInUp 0.6s ease-out forwards;
    opacity: 0;
}

.transcript-line--1 { animation-delay: 0.5s; }
.transcript-line--2 { animation-delay: 1s; }
.transcript-line--3 { animation-delay: 1.5s; }

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

/* ========================================
   FOOTER
======================================== */
.footer {
    padding: var(--space-2xl) var(--space-lg);
    border-top: 1px solid var(--color-border);
}

.footer-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: var(--space-xl);
}

.footer-brand {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.footer-tagline {
    font-size: 14px;
    color: var(--color-text-tertiary);
}

.footer-links {
    display: flex;
    gap: var(--space-xl);
}

.footer-links a {
    font-size: 14px;
    color: var(--color-text-secondary);
    transition: color var(--transition-fast);
}

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

.footer-bottom {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-top: var(--space-lg);
    border-top: 1px solid var(--color-border);
    font-size: 13px;
    color: var(--color-text-tertiary);
}

.footer-ua {
    font-size: 20px;
}

/* ========================================
   RESPONSIVE
======================================== */
@media (max-width: 1024px) {
    .hero {
        grid-template-columns: 1fr;
        text-align: center;
        gap: var(--space-2xl);
    }
    
    .hero-content {
        order: 1;
    }
    
    .hero-phone {
        order: 2;
    }
    
    .hero-description {
        margin-left: auto;
        margin-right: auto;
    }
    
    .hero-actions {
        justify-content: center;
    }
    
    .hero-stats {
        justify-content: center;
    }
    
    .radio-tower-svg {
        left: 50%;
        transform: translateX(-50%);
        bottom: 5%;
        opacity: 0.3;
        width: 350px;
        height: 400px;
    }
    
    .features-grid {
        grid-template-columns: 1fr 1fr;
    }
    
    .feature-card--large {
        grid-column: span 2;
        grid-row: span 1;
    }
    
    .process-flow {
        flex-direction: column;
        gap: var(--space-md);
    }
    
    .process-connector {
        display: none;
    }
    
    .download-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .download-text {
        order: 1;
    }
    
    .download-phone {
        order: 2;
    }
    
    .download-buttons {
        justify-content: center;
    }
    
    .download-note {
        justify-content: center;
        text-align: left;
    }
    
    .use-cases-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: var(--space-md);
    }
    
    .use-case-video {
        max-height: 300px;
    }
}

@media (max-width: 768px) {
    .nav-links a:not(.nav-cta) {
        display: none;
    }
    
    .radio-tower-svg {
        display: none;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .feature-card--large {
        grid-column: span 1;
    }
    
    .phone-frame {
        width: 280px;
        height: 580px;
    }
    
    .phone-frame--small {
        width: 240px;
        height: 480px;
        transform: rotate(0deg);
    }
    
    .use-cases-grid {
        grid-template-columns: 1fr;
        max-width: 360px;
        margin-left: auto;
        margin-right: auto;
    }
    
    .use-case-video {
        max-height: 350px;
    }
}

@media (max-width: 480px) {
    .hero {
        padding-left: var(--space-md);
        padding-right: var(--space-md);
    }
    
    .hero-actions {
        flex-direction: column;
    }
    
    .hero-stats {
        flex-wrap: wrap;
    }
    
    .hero-stat-divider:last-of-type {
        display: none;
    }
    
    .phone-frame {
        width: 260px;
        height: 540px;
    }
}