:root {
    --bg-base: #1a2430;
    --bg-surface: #222e3c;
    --border-color: #334155;
    --primary: #67c3d3;
    --primary-light: #8dd8e4;
    --gold: #f6c31f;
    --purple: #8b5cf6;
    --pink: #ec4899;
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --success: #10b981;
}

* {
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    margin: 0;
    padding: 0;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-base);
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 20px;
    text-align: center;
}

/* Hero Section */
.hero {
    background: var(--bg-base);
    padding: 40px 0 60px;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -20%;
    left: 50%;
    transform: translateX(-50%);
    width: 1000px;
    height: 1000px;
    background: radial-gradient(ellipse, rgba(103, 195, 211, 0.08) 0%, rgba(246, 195, 31, 0.04) 35%, transparent 65%);
    pointer-events: none;
    z-index: 0;
}

.hero-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 30px;
    text-align: center;
    position: relative;
    z-index: 1;
}

.hero-content {
    width: 100%;
    max-width: 800px;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    margin-bottom: 10px;
}

.logo img {
    border-radius: 18px;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.logo h1 {
    font-size: 2.5rem;
    margin: 0;
    color: var(--text-primary);
    letter-spacing: -0.5px;
}

.hero-kicker {
    font-size: 0.78rem;
    font-weight: 800;
    letter-spacing: 1.6px;
    text-transform: uppercase;
    color: var(--primary-light);
    margin: 0 0 8px 0;
}

.tagline {
    font-size: 1.5rem;
    font-weight: 700;
    margin-top: 10px;
    margin-bottom: 8px;
    background: linear-gradient(135deg, var(--primary), var(--gold), var(--primary-light));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.sub-tagline {
    font-size: 1rem;
    color: var(--text-secondary);
    max-width: 580px;
    margin: 0 auto;
}

/* Hero Visual - Screenshot Carousel */
.hero-visual-row {
    position: relative;
    width: 100%;
    max-width: 860px;
    height: 620px;
    margin: 20px auto 0;
}

.hero-visual-row::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 110%;
    height: 70%;
    background: radial-gradient(ellipse, rgba(103, 195, 211, 0.06) 0%, rgba(246, 195, 31, 0.03) 40%, transparent 70%);
    pointer-events: none;
    z-index: 0;
}

.phone-frame {
    position: absolute;
    bottom: 0;
    opacity: 0;
    transition: opacity 0.8s ease-in-out;
    aspect-ratio: 1284 / 2778;
    pointer-events: none;
    background: #000;
    padding: 6px;
    border-radius: 40px;
    box-shadow:
        0 20px 60px rgba(0, 0, 0, 0.5),
        0 0 0 1px rgba(255, 255, 255, 0.08);
    z-index: 1;
}

.phone-frame img {
    display: block;
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 34px;
}

.phone-frame.visible {
    opacity: 1;
    pointer-events: auto;
}

.phone-frame[data-slot="left"] {
    width: 240px;
    left: 30px;
}

.phone-frame[data-slot="center"] {
    width: 280px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 2;
    box-shadow:
        0 25px 80px rgba(0, 0, 0, 0.6),
        0 0 0 1px rgba(255, 255, 255, 0.1),
        0 0 60px rgba(103, 195, 211, 0.08);
}

.phone-frame[data-slot="right"] {
    width: 240px;
    right: 30px;
}

.carousel-captions {
    width: 100%;
    max-width: 860px;
    position: relative;
    min-height: 1.6em;
}

.carousel-captions-row {
    display: grid;
    grid-template-columns: 270px 280px 270px;
    justify-content: center;
    gap: 0;
    max-width: 860px;
    width: 100%;
    padding: 0 30px;
    opacity: 0;
    transition: opacity 0.4s ease;
    position: absolute;
    top: 0;
    left: 0;
}

.carousel-captions-row.visible {
    opacity: 1;
    position: relative;
}

.carousel-captions-row span {
    font-size: 0.85rem;
    color: var(--text-secondary);
    text-align: center;
}

.carousel-caption-mobile {
    font-size: 0.95rem;
    color: var(--text-secondary);
    margin: 18px 0 0 0;
    transition: opacity 0.4s ease;
    min-height: 1.6em;
    display: none;
}

.carousel-dots {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-top: 16px;
}

.carousel-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background-color: #475569;
    border: none;
    padding: 0;
    cursor: pointer;
    transition: background-color 0.3s, transform 0.3s;
}

.carousel-dot.active {
    background-color: var(--primary-light);
    transform: scale(1.25);
}

/* Buttons */
.cta-buttons {
    display: flex;
    gap: 16px;
    margin-top: 24px;
    flex-wrap: wrap;
    justify-content: center;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 14px 28px;
    border-radius: 12px;
    text-decoration: none;
    font-weight: 700;
    transition: all 0.3s ease;
    font-size: 1rem;
}

.btn-primary {
    background-color: var(--text-primary);
    color: var(--bg-base);
    box-shadow: 0 0 20px rgba(103, 195, 211, 0.15), 0 4px 12px rgba(0, 0, 0, 0.2);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 0 30px rgba(103, 195, 211, 0.25), 0 6px 20px rgba(0, 0, 0, 0.3);
}

.btn-secondary {
    background-color: var(--border-color);
    color: var(--text-secondary);
    border: 1px solid #475569;
}

.btn-secondary:hover {
    background-color: #3B4963;
    border-color: var(--text-muted);
    transform: translateY(-2px);
}

.btn.disabled {
    opacity: 0.5;
    cursor: not-allowed;
    background-color: var(--bg-surface);
    color: var(--text-muted);
    box-shadow: none;
    transform: none !important;
    border: 1px solid var(--border-color);
}

/* Section shared */
.section-divider {
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(51, 65, 85, 0.4) 30%, rgba(51, 65, 85, 0.4) 70%, transparent);
    border: none;
    margin: 0;
}

.section-intro {
    max-width: 760px;
    margin: 0 auto 28px;
    padding: 0 20px;
}

.section-kicker {
    font-size: 0.78rem;
    font-weight: 800;
    letter-spacing: 1.6px;
    text-transform: uppercase;
    color: var(--primary-light);
    margin: 0 0 8px 0;
}

.section-title {
    font-size: 2rem;
    line-height: 1.1;
    letter-spacing: -0.8px;
    margin: 0;
    color: var(--text-primary);
}

.section-subtitle {
    font-size: 1rem;
    color: var(--text-secondary);
    max-width: 660px;
    margin: 12px auto 0;
}

/* Features */
.features-section {
    background: var(--bg-base);
    padding: 56px 0;
}

.features {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    padding: 0 20px;
}

.feature-card {
    background: var(--bg-surface);
    padding: 24px 20px;
    border-radius: 16px;
    border: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    transition: all 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-4px);
    border-color: #475569;
}

.feature-card[data-glow="teal"]:hover {
    box-shadow: 0 0 40px rgba(103, 195, 211, 0.35), 0 0 80px rgba(103, 195, 211, 0.12), 0 8px 24px rgba(0, 0, 0, 0.3);
}
.feature-card[data-glow="gold"]:hover {
    box-shadow: 0 0 40px rgba(246, 195, 31, 0.35), 0 0 80px rgba(246, 195, 31, 0.12), 0 8px 24px rgba(0, 0, 0, 0.3);
}
.feature-card[data-glow="green"]:hover {
    box-shadow: 0 0 40px rgba(16, 185, 129, 0.35), 0 0 80px rgba(16, 185, 129, 0.12), 0 8px 24px rgba(0, 0, 0, 0.3);
}
.feature-card[data-glow="purple"]:hover {
    box-shadow: 0 0 40px rgba(139, 92, 246, 0.35), 0 0 80px rgba(139, 92, 246, 0.12), 0 8px 24px rgba(0, 0, 0, 0.3);
}
.feature-card[data-glow="pink"]:hover {
    box-shadow: 0 0 40px rgba(236, 72, 153, 0.35), 0 0 80px rgba(236, 72, 153, 0.12), 0 8px 24px rgba(0, 0, 0, 0.3);
}
.feature-card[data-glow="blue"]:hover {
    box-shadow: 0 0 40px rgba(56, 189, 248, 0.35), 0 0 80px rgba(56, 189, 248, 0.12), 0 8px 24px rgba(0, 0, 0, 0.3);
}

.feature-icon {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 14px;
    font-size: 28px;
}

.feature-card h2 {
    font-size: 1.1rem;
    color: var(--text-primary);
    margin: 0 0 8px 0;
}

.feature-card p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin: 0;
    line-height: 1.5;
}

/* How it works */
.workflow-section {
    padding: 56px 0;
}

.workflow-steps {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
    padding: 0 20px;
    max-width: 960px;
    margin: 0 auto;
}

.workflow-step {
    text-align: center;
    padding: 20px 12px;
    position: relative;
}

.workflow-number {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: rgba(103, 195, 211, 0.12);
    border: 1px solid rgba(103, 195, 211, 0.25);
    color: var(--primary-light);
    font-weight: 800;
    font-size: 0.9rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 12px;
}

.workflow-step h3 {
    font-size: 1rem;
    color: var(--text-primary);
    margin: 0 0 6px 0;
}

.workflow-step p {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin: 0;
    line-height: 1.45;
}

/* Footer */
.footer {
    padding: 30px 0;
    border-top: 1px solid var(--border-color);
}

.footer-links {
    margin: 0 0 8px 0;
    font-size: 0.9rem;
}

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

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

.footer-links .dot {
    color: var(--text-muted);
    margin: 0 12px;
}

.footer-copyright {
    margin: 0;
    font-size: 0.8rem;
    color: var(--text-muted);
}

/* Sub-pages (privacy, terms, support, changelog) */
.page {
    padding: 40px 0;
}

.page .nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 0 24px;
}

.page .nav a {
    color: var(--text-primary);
    text-decoration: none;
    font-weight: 600;
    opacity: 0.9;
}

.page .nav-links {
    display: flex;
    gap: 14px;
}

.page .card {
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    padding: 32px;
    text-align: left;
}

.page .card h1 {
    margin: 0 0 16px;
    font-size: 1.8rem;
}

.page .card p,
.page .card li {
    color: var(--text-secondary);
    line-height: 1.7;
}

.page .card ul {
    padding-left: 20px;
}

/* Responsive */
@media (max-width: 900px) {
    .hero {
        padding-top: 20px;
        padding-bottom: 30px;
    }

    .hero::before {
        width: 500px;
        height: 500px;
    }

    .hero-container {
        gap: 15px;
    }

    .logo {
        margin-bottom: 5px;
    }

    .logo h1 {
        font-size: 1.8rem;
    }

    .tagline {
        font-size: 1.1rem;
        margin-top: 0;
        margin-bottom: 5px;
        padding: 0 10px;
    }

    .sub-tagline {
        font-size: 0.9rem;
    }

    .features {
        grid-template-columns: repeat(2, 1fr);
        gap: 16px;
    }

    .workflow-steps {
        grid-template-columns: repeat(2, 1fr);
        gap: 12px;
    }

    .section-title {
        font-size: 1.55rem;
    }

    .section-subtitle {
        font-size: 0.95rem;
    }

    .feature-card:hover {
        transform: translateY(-2px);
    }
    .feature-card[data-glow="teal"]:hover,
    .feature-card[data-glow="gold"]:hover,
    .feature-card[data-glow="green"]:hover,
    .feature-card[data-glow="purple"]:hover,
    .feature-card[data-glow="pink"]:hover,
    .feature-card[data-glow="blue"]:hover {
        box-shadow: 0 0 25px rgba(103, 195, 211, 0.2), 0 4px 12px rgba(0, 0, 0, 0.2);
    }

    .hero-visual-row {
        max-width: 260px;
        height: 575px;
        margin: 10px auto 0;
    }

    .hero-visual-row::before {
        display: none;
    }

    .phone-frame,
    .phone-frame[data-slot="left"],
    .phone-frame[data-slot="center"],
    .phone-frame[data-slot="right"] {
        width: 100% !important;
        left: 0 !important;
        right: auto !important;
        transform: none !important;
        z-index: auto !important;
        padding: 5px !important;
        border-radius: 36px !important;
        box-shadow: 0 15px 40px rgba(0, 0, 0, 0.5), 0 0 0 1px rgba(255, 255, 255, 0.08) !important;
    }

    .phone-frame img {
        border-radius: 31px !important;
    }

    .carousel-captions {
        display: none;
    }

    .carousel-caption-mobile {
        display: block;
    }
}

@media (max-width: 600px) {
    .features {
        grid-template-columns: 1fr;
    }

    .workflow-steps {
        grid-template-columns: 1fr;
    }

    .page .nav-links {
        gap: 10px;
        font-size: 13px;
    }
}