:root {
    --bg-dark: #0B0E14;
    --card-bg: #161B26;
    --accent-blue: #00F0FF;
    --accent-purple: #7000FF;
    --text-main: #F0F4FF;
    --text-muted: #8E9BAE;
    --border-color: rgba(255, 255, 255, 0.08);
}

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

body {
    font-family: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, sans-serif;
    background-color: var(--bg-dark);
    color: var(--text-main);
    line-height: 1.6;
    overflow-x: hidden;
}

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

/* Navbar */
.navbar {
    border-bottom: 1px solid var(--border-color);
    padding: 20px 0;
    position: sticky;
    top: 0;
    background: rgba(11, 14, 20, 0.85);
    backdrop-filter: blur(12px);
    z-index: 100;
}

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

.logo {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 22px;
    font-weight: 800;
    background: linear-gradient(135deg, var(--accent-blue), var(--accent-purple));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 32px;
}

.nav-links a {
    color: var(--text-muted);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.2s;
}

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

.btn-nav {
    background: linear-gradient(135deg, #00F0FF, #7000FF);
    color: #fff !important;
    -webkit-text-fill-color: #fff !important;
    padding: 10px 20px;
    border-radius: 30px;
    font-weight: 600 !important;
}

/* Hero Section */
.hero {
    padding: 80px 0 120px;
    position: relative;
}

.hero-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.badge {
    display: inline-block;
    padding: 6px 16px;
    background: rgba(0, 240, 255, 0.1);
    border: 1px solid rgba(0, 240, 255, 0.3);
    border-radius: 20px;
    color: var(--accent-blue);
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 24px;
}

.hero h1 {
    font-size: 48px;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 20px;
    letter-spacing: -1px;
}

.hero-subtitle {
    font-size: 18px;
    color: var(--text-muted);
    margin-bottom: 36px;
}

.playstore-btn img {
    height: 54px;
    transition: transform 0.2s;
}

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

.stats-row {
    display: flex;
    gap: 40px;
    margin-top: 48px;
    padding-top: 32px;
    border-top: 1px solid var(--border-color);
}

.stat-num {
    display: block;
    font-size: 24px;
    font-weight: 800;
    color: var(--accent-blue);
}

.stat-desc {
    font-size: 14px;
    color: var(--text-muted);
}

/* Hero Visual (Radar Phone Mockup) */
.hero-visual {
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 500px;
}

.radar-circle {
    position: absolute;
    border-radius: 50%;
    border: 1px solid rgba(0, 240, 255, 0.15);
    animation: pulse 4s infinite ease-in-out;
}

.circle-1 { width: 280px; height: 280px; animation-delay: 0s; }
.circle-2 { width: 400px; height: 400px; animation-delay: 1.3s; }
.circle-3 { width: 520px; height: 520px; animation-delay: 2.6s; }

@keyframes pulse {
    0% { transform: scale(0.85); opacity: 0.2; }
    50% { transform: scale(1.05); opacity: 0.8; }
    100% { transform: scale(0.85); opacity: 0.2; }
}

.phone-mockup {
    width: 280px;
    height: 480px;
    background: #121620;
    border: 3px solid rgba(0, 240, 255, 0.4);
    border-radius: 40px;
    padding: 20px;
    box-shadow: 0 0 40px rgba(112, 0, 255, 0.3);
    position: relative;
    z-index: 2;
}

.screen-header {
    text-align: center;
    font-size: 14px;
    font-weight: 600;
    color: var(--accent-blue);
    margin-bottom: 24px;
}

.profile-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    padding: 14px;
    border-radius: 16px;
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 14px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

.avatar {
    width: 42px;
    height: 42px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
}

.ig-avatar { background: radial-gradient(circle at 30% 107%, #fdf497 0%, #fdf497 5%, #fd5949 45%,#d6249f 60%,#285AEB 90%); }
.li-avatar { background: #0077b5; }
.x-avatar { background: #1da1f2; }

.card-name {
    font-size: 14px;
    font-weight: 700;
}

.card-sub {
    font-size: 12px;
    color: var(--text-muted);
}

/* Features */
.features {
    padding: 100px 0;
    background: #0E121A;
}

.section-title {
    text-align: center;
    margin-bottom: 60px;
}

.section-title h2 {
    font-size: 36px;
    font-weight: 800;
    margin-bottom: 12px;
}

.section-title p {
    color: var(--text-muted);
    font-size: 18px;
}

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

.feature-card, .step-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    padding: 36px;
    border-radius: 24px;
    transition: transform 0.3s;
}

.feature-card:hover {
    transform: translateY(-8px);
    border-color: rgba(0, 240, 255, 0.4);
}

.feature-icon {
    font-size: 40px;
    margin-bottom: 20px;
}

.feature-card h3, .step-card h3 {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 12px;
}

.feature-card p, .step-card p {
    color: var(--text-muted);
    font-size: 15px;
}

/* Steps */
.how-it-works {
    padding: 100px 0;
}

.step-num {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--accent-blue), var(--accent-purple));
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    font-size: 20px;
    margin-bottom: 20px;
}

/* CTA Banner */
.cta-banner {
    padding: 80px 0;
    background: linear-gradient(135deg, rgba(0, 240, 255, 0.1), rgba(112, 0, 255, 0.1));
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
}

.cta-container {
    text-align: center;
}

.cta-container h2 {
    font-size: 36px;
    font-weight: 800;
    margin-bottom: 16px;
}

.cta-container p {
    color: var(--text-muted);
    font-size: 18px;
    margin-bottom: 32px;
}

.btn-primary {
    display: inline-block;
    background: linear-gradient(135deg, var(--accent-blue), var(--accent-purple));
    color: #fff;
    padding: 16px 36px;
    border-radius: 40px;
    font-weight: 700;
    font-size: 18px;
    text-decoration: none;
    box-shadow: 0 8px 24px rgba(0, 240, 255, 0.3);
    transition: transform 0.2s;
}

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

/* Footer */
footer {
    padding: 40px 0;
    border-top: 1px solid var(--border-color);
    color: var(--text-muted);
    font-size: 14px;
}

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

.footer-links a {
    color: var(--text-muted);
    text-decoration: none;
    margin-left: 24px;
}

/* Video Showcase Story */
.video-showcase {
    padding: 100px 0;
    background: #0B0E14;
}

.story-container {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 40px;
    align-items: center;
}

.story-video-card {
    position: relative;
    border-radius: 24px;
    overflow: hidden;
    border: 1px solid var(--border-color);
    box-shadow: 0 12px 36px rgba(0, 0, 0, 0.5);
    background: #000;
}

.video-placeholder {
    position: relative;
    width: 100%;
    aspect-ratio: 16 / 9;
    background: #000;
    overflow: hidden;
}

.showcase-img {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0;
    transition: opacity 0.8s ease-in-out;
    transform: scale(1.0);
}

.showcase-img.active {
    opacity: 1;
    animation: kenBurns 4s ease-out forwards;
}

@keyframes kenBurns {
    0% { transform: scale(1.0); }
    100% { transform: scale(1.06); }
}

.cinematic-caption-bar {
    background: #121722;
    border-top: 1px solid var(--border-color);
    padding: 14px 20px;
    transition: all 0.3s ease;
}

.caption-tag {
    display: inline-block;
    font-size: 11px;
    font-weight: 800;
    color: var(--accent-blue);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 4px;
}

.cinematic-caption-bar p {
    font-size: 14px;
    color: #E2E8F0;
    line-height: 1.5;
    font-weight: 500;
    margin: 0;
}

.play-overlay {
    position: absolute;
    inset: 0;
    background: rgba(11, 14, 20, 0.4);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 14px;
    cursor: pointer;
    backdrop-filter: blur(2px);
    transition: all 0.3s ease;
    z-index: 10;
}

.play-overlay.playing {
    background: rgba(11, 14, 20, 0.05);
    backdrop-filter: blur(0px);
}

.play-overlay.playing .play-btn-circle {
    opacity: 0.4;
    transform: scale(0.75);
}

.play-overlay.playing:hover .play-btn-circle {
    opacity: 0.9;
    transform: scale(0.9);
}

.play-overlay:hover {
    background: rgba(11, 14, 20, 0.2);
}

.play-btn-circle {
    width: 64px;
    height: 64px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--accent-blue), var(--accent-purple));
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    box-shadow: 0 0 20px rgba(0, 240, 255, 0.6);
    transition: transform 0.2s, opacity 0.2s;
}

.play-overlay:hover .play-btn-circle {
    transform: scale(1.1);
}

.play-overlay span {
    font-weight: 700;
    font-size: 16px;
    text-shadow: 0 2px 4px rgba(0,0,0,0.8);
}

.story-progress-bar {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: rgba(255, 255, 255, 0.2);
}

.story-progress-fill {
    height: 100%;
    width: 25%;
    background: linear-gradient(90deg, var(--accent-blue), var(--accent-purple));
    transition: width 0.3s ease;
}

.story-timeline {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.story-step {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    padding: 20px 24px;
    border-radius: 16px;
    cursor: pointer;
    transition: all 0.25s ease;
}

.story-step:hover {
    border-color: rgba(0, 240, 255, 0.5);
    transform: translateX(4px);
}

.story-step.active {
    border-color: var(--accent-blue);
    background: linear-gradient(135deg, rgba(0, 240, 255, 0.08), rgba(112, 0, 255, 0.08));
    box-shadow: 0 0 16px rgba(0, 240, 255, 0.15);
}

.step-time {
    font-size: 12px;
    font-weight: 700;
    color: var(--accent-blue);
    margin-bottom: 4px;
}

.story-step h4 {
    font-size: 16px;
    font-weight: 700;
    margin-bottom: 4px;
}

.story-step p {
    font-size: 14px;
    color: var(--text-muted);
}

/* Case Studies Section */
.case-studies {
    padding: 100px 0;
    background: #0E121A;
    border-top: 1px solid var(--border-color);
}

.case-studies-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
}

.case-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 24px;
    overflow: hidden;
    transition: transform 0.3s ease, border-color 0.3s ease;
}

.case-card:hover {
    transform: translateY(-6px);
    border-color: var(--accent-blue);
}

.video-wrapper {
    position: relative;
    width: 100%;
    padding-bottom: 56.25%; /* 16:9 Aspect Ratio */
    height: 0;
    overflow: hidden;
    background: #000;
}

.video-wrapper iframe,
.video-wrapper video {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border: 0;
    object-fit: cover;
}

.case-info {
    padding: 24px;
}

.case-info h3 {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 8px;
    color: var(--text-main);
}

.case-info p {
    font-size: 14px;
    color: var(--text-muted);
}

/* Privacy & Background Radar Highlight */
.privacy-radar {
    padding: 80px 0;
    background: #0B0E14;
}

.privacy-radar-card {
    background: linear-gradient(135deg, rgba(0, 240, 255, 0.05), rgba(112, 0, 255, 0.05));
    border: 1px solid rgba(0, 240, 255, 0.2);
    border-radius: 32px;
    padding: 56px;
    box-shadow: 0 16px 48px rgba(0, 0, 0, 0.4);
}

.privacy-badge {
    display: inline-block;
    padding: 8px 18px;
    background: rgba(0, 240, 255, 0.12);
    border: 1px solid rgba(0, 240, 255, 0.3);
    border-radius: 30px;
    color: var(--accent-blue);
    font-size: 14px;
    font-weight: 700;
    margin-bottom: 20px;
}

.privacy-radar-card h2 {
    font-size: 32px;
    font-weight: 800;
    margin-bottom: 16px;
}

.privacy-lead {
    font-size: 18px;
    color: var(--text-muted);
    max-width: 800px;
    margin-bottom: 40px;
}

.privacy-highlights-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

.privacy-item {
    background: rgba(22, 27, 38, 0.7);
    border: 1px solid var(--border-color);
    padding: 28px;
    border-radius: 20px;
}

.privacy-item-icon {
    font-size: 36px;
    margin-bottom: 16px;
}

.privacy-item h4 {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 8px;
    color: var(--text-main);
}

.privacy-item p {
    font-size: 14px;
    color: var(--text-muted);
    line-height: 1.6;
}

/* ========================================================
   COMPREHENSIVE RESPONSIVE DESIGN FOR MOBILE PHONES (< 900px)
   ======================================================== */
@media (max-width: 900px) {
    .container {
        padding: 0 16px;
    }

    /* Navbar */
    .navbar {
        padding: 14px 0;
    }
    .nav-container {
        flex-direction: row;
        justify-content: space-between;
    }
    .logo {
        font-size: 19px;
    }
    .nav-links {
        gap: 12px;
    }
    .nav-links a:not(.btn-nav) {
        display: none; /* Keep navigation clean on mobile */
    }
    .btn-nav {
        padding: 8px 16px;
        font-size: 14px;
    }

    /* Hero Section */
    .hero {
        padding: 40px 0 60px;
    }
    .hero-container {
        grid-template-columns: 1fr;
        gap: 40px;
        text-align: center;
    }
    .hero h1 {
        font-size: 30px;
        line-height: 1.25;
    }
    .hero-sub {
        font-size: 16px;
    }
    .hero-buttons {
        justify-content: center;
        flex-direction: column;
        gap: 12px;
    }
    .hero-buttons .btn-primary,
    .hero-buttons .btn-secondary {
        width: 100%;
        text-align: center;
    }
    .hero-visual {
        display: flex;
        justify-content: center;
    }
    .radar-circle {
        width: 280px;
        height: 280px;
    }

    /* Video Showcase (London Tube Story) - 100% Full Width on Mobile */
    .video-showcase {
        padding: 50px 0;
    }
    .story-container {
        grid-template-columns: 1fr;
        gap: 24px;
    }
    .story-video-card {
        width: 100%;
        border-radius: 18px;
    }
    .showcase-img {
        width: 100%;
        height: auto;
        display: block;
    }
    .play-btn-circle {
        width: 52px;
        height: 52px;
        font-size: 20px;
    }
    .play-overlay span {
        font-size: 14px;
        padding: 0 12px;
        text-align: center;
    }
    .story-timeline {
        gap: 12px;
        width: 100%;
    }
    .story-step {
        padding: 16px;
        border-radius: 14px;
    }
    .story-step h4 {
        font-size: 15px;
    }
    .story-step p {
        font-size: 13px;
    }

    /* Features Grid */
    .features {
        padding: 60px 0;
    }
    .features-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    .feature-card {
        padding: 28px 20px;
    }

    /* On-Device Privacy Highlight Card */
    .privacy-radar {
        padding: 50px 0;
    }
    .privacy-radar-card {
        padding: 30px 18px;
        border-radius: 22px;
        text-align: center;
    }
    .privacy-radar-card h2 {
        font-size: 24px;
    }
    .privacy-lead {
        font-size: 15px;
        margin-bottom: 24px;
    }
    .privacy-highlights-grid {
        grid-template-columns: 1fr;
        gap: 16px;
        text-align: left;
    }
    .privacy-item {
        padding: 20px;
        border-radius: 16px;
    }

    /* How It Works Steps */
    .how-it-works {
        padding: 60px 0;
    }
    .steps-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    /* Case Studies & Video Embeds - 100% Full Width on Mobile */
    .case-studies {
        padding: 50px 0;
    }
    .case-studies-grid {
        grid-template-columns: 1fr;
        gap: 24px;
    }
    .case-card {
        border-radius: 18px;
    }
    .case-info {
        padding: 18px;
    }
    .case-info h3 {
        font-size: 18px;
    }
    .case-info p {
        font-size: 13px;
    }

    /* Call to Action Banner */
    .cta-banner {
        padding: 60px 0;
    }
    .cta-container h2 {
        font-size: 26px;
    }
    .cta-container .btn-primary {
        width: 100%;
        text-align: center;
        padding: 14px 20px;
        font-size: 16px;
    }

    /* Footer */
    .footer-container {
        flex-direction: column;
        gap: 16px;
        text-align: center;
    }
    .footer-links {
        display: flex;
        gap: 20px;
    }
    .footer-links a {
        margin-left: 0;
    }
}