@import url('https://fonts.googleapis.com/css2?family=Aladin&family=Fraunces:opsz,wght@9..144,500;9..144,600;9..144,700&family=Inter:wght@400;500;600;700&family=IBM+Plex+Mono:wght@500;600&display=swap');

:root {
    --bg: #E8F4F9;
    --surface: #FFFFFF;
    --surface-alt: #F3FAFD;
    --ink: #17313D;
    --ink-soft: #447F98;
    --ink-faint: #6298B5;
    --line: #C9E4EE;
    --accent: #2196F3;
    --accent-dark: #447F98;
    --accent-soft: #E8F4F9;
    --radius-lg: 16px;
    --radius-md: 12px;
    --radius-sm: 8px;
    --radius-pill: 999px;
}

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

body {
    min-height: 100vh;
    background: var(--bg);
    overflow-x: hidden;
    font-family: 'Inter', -apple-system, sans-serif;
    color: var(--ink);
}

/* ---------- Top nav ---------- */

.top-nav {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    padding: 0 40px;
    height: 72px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    z-index: 1000;
    background: var(--surface);
    border-bottom: 1px solid var(--line);
}

.top-nav .nav-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    font-family: 'Fraunces', serif;
    font-weight: 600;
    font-size: 1.15rem;
    color: var(--ink);
}

.top-nav .nav-brand img {
    width: 28px;
    height: 28px;
    object-fit: contain;
}

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

.nav-links a {
    text-decoration: none;
    font-weight: 500;
    font-size: 0.95rem;
    color: var(--ink-soft);
    transition: color 0.15s ease;
    display: inline-flex;
    align-items: center;
    gap: 7px;
}

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

.nav-links a.login-btn {
    background: var(--accent);
    color: white;
    padding: 9px 22px;
    border-radius: var(--radius-pill);
    font-weight: 600;
}

.nav-links a.login-btn:hover {
    background: var(--accent-dark);
    color: white;
}

/* ---------- Hero ---------- */

.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 140px 20px 80px;
    position: relative;
}

.content {
    width: 100%;
    max-width: 640px;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
}

.brand-row {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    margin-bottom: 14px;
}

.brand-logo-hero {
    width: 56px;
    height: 56px;
    object-fit: contain;
}

.content h1 {
    font-family: 'Aladin', cursive;
    font-weight: 400;
    font-size: 88px;
    color: var(--accent);
    letter-spacing: 1px;
    line-height: 1;
}

.subhead {
    font-size: 15px;
    font-weight: 600;
    color: var(--accent);
    text-transform: uppercase;
    letter-spacing: 1.5px;
    margin-bottom: 20px;
}

.content .description {
    font-size: 17px;
    line-height: 1.65;
    color: var(--ink-soft);
    max-width: 480px;
    margin: 0 auto 30px auto;
}

/* Signature divider: a net-knot rule, nodding to the fishing-net motif */
.net-divider {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 36px;
    width: 100%;
    max-width: 220px;
}

.net-divider::before,
.net-divider::after {
    content: "";
    flex: 1;
    height: 1px;
    background: var(--line);
}

.net-divider .knots {
    display: flex;
    gap: 6px;
}

.net-divider .knots span {
    width: 5px;
    height: 5px;
    background: var(--accent);
    transform: rotate(45deg);
    display: block;
}

/* ---------- Download card ---------- */

.download-card {
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: var(--radius-lg);
    padding: 34px 36px 30px;
    box-shadow: 0 1px 2px rgba(18, 48, 45, 0.04), 0 12px 28px -12px rgba(18, 48, 45, 0.10);
    width: 100%;
    max-width: 480px;
    margin: 0 auto;
    text-align: left;
}

.download-header {
    display: flex;
    align-items: center;
    gap: 14px;
    margin-bottom: 20px;
}

.download-header i {
    font-size: 20px;
    color: var(--accent);
    background: var(--accent-soft);
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-sm);
    flex-shrink: 0;
}

.download-header .titles {
    flex: 1;
    min-width: 0;
}

.download-header h3 {
    font-size: 17px;
    font-weight: 700;
    color: var(--ink);
    line-height: 1.3;
}

.download-header span {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 12px;
    color: var(--ink-faint);
    font-weight: 500;
}

.apk-info {
    display: flex;
    align-items: center;
    gap: 14px;
    background: var(--surface-alt);
    padding: 12px 16px;
    border-radius: var(--radius-md);
    margin-bottom: 22px;
    border: 1px solid var(--line);
}

.apk-info i {
    font-size: 16px;
    color: var(--accent);
}

.apk-info .version {
    font-family: 'IBM Plex Mono', monospace;
    font-weight: 600;
    color: var(--ink);
    font-size: 13px;
}

.apk-info .size {
    font-family: 'IBM Plex Mono', monospace;
    color: var(--ink-faint);
    font-size: 13px;
}

.apk-info .badge {
    margin-left: auto;
    background: var(--accent);
    color: white;
    padding: 4px 12px;
    border-radius: var(--radius-pill);
    font-size: 12px;
    font-weight: 600;
    white-space: nowrap;
}

.download-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    width: 100%;
    background: var(--accent);
    color: white;
    border: none;
    padding: 15px 24px;
    font-size: 16px;
    font-weight: 600;
    font-family: 'Inter', sans-serif;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: background 0.15s ease;
    text-decoration: none;
    margin-bottom: 24px;
}

.download-btn i {
    font-size: 17px;
}

.download-btn:hover {
    background: var(--accent-dark);
}

.download-btn:active {
    transform: scale(0.99);
}

.system-req {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px 16px;
    font-size: 13.5px;
    color: var(--ink-soft);
    padding-top: 20px;
    border-top: 1px solid var(--line);
}

.system-req span {
    display: flex;
    align-items: center;
}

.system-req i {
    color: var(--accent);
    width: 18px;
    margin-right: 8px;
    text-align: center;
}

.footer-note {
    margin-top: 18px;
    font-size: 13px;
    color: var(--ink-faint);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 7px;
}

.footer-note i {
    color: var(--accent);
    font-size: 13px;
}

/* ---------- Action row (demo video) ---------- */

.action-row {
    margin-top: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 14px;
    font-size: 14.5px;
    color: var(--ink-soft);
}

.action-row .play-trigger {
    display: inline-flex;
    align-items: center;
    background: none;
    border: none;
    padding: 0;
    font-family: 'Inter', sans-serif;
    font-size: 14.5px;
    font-weight: 500;
    color: var(--ink-soft);
    cursor: pointer;
    transition: color 0.15s ease;
}

.action-row .play-trigger:hover,
.action-row .play-trigger:focus-visible {
    color: var(--accent);
}

.action-row i {
    color: var(--accent);
    margin-right: 6px;
}

.action-row .time-badge {
    background: var(--surface);
    border: 1px solid var(--line);
    padding: 4px 14px;
    border-radius: var(--radius-pill);
    font-family: 'IBM Plex Mono', monospace;
    font-weight: 500;
    font-size: 12.5px;
    color: var(--ink-faint);
}

/* ---------- Video demo modal ---------- */

.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(23, 49, 61, 0.6);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 24px;
    z-index: 2000;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.18s ease;
}

.modal-overlay.open {
    opacity: 1;
    visibility: visible;
}

.modal-box {
    background: var(--surface);
    border-radius: var(--radius-lg);
    width: 100%;
    max-width: 720px;
    overflow: hidden;
    box-shadow: 0 24px 48px -16px rgba(23, 49, 61, 0.35);
    transform: scale(0.97);
    transition: transform 0.18s ease;
}

.modal-overlay.open .modal-box {
    transform: scale(1);
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 20px;
    border-bottom: 1px solid var(--line);
}

.modal-title {
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 600;
    font-size: 15px;
    color: var(--ink);
}

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

.modal-close {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 34px;
    height: 34px;
    border-radius: var(--radius-pill);
    border: none;
    background: transparent;
    color: var(--ink-soft);
    cursor: pointer;
    font-size: 15px;
    transition: background 0.15s ease, color 0.15s ease;
}

.modal-close:hover {
    background: var(--accent-soft);
    color: var(--accent);
}

.modal-video-wrap {
    background: #0B1A21;
    width: 100%;
    aspect-ratio: 16 / 9;
}

.modal-video-wrap video {
    width: 100%;
    height: 100%;
    display: block;
    object-fit: contain;
}

@media (max-width: 600px) {
    .modal-overlay {
        padding: 12px;
    }
    .modal-header {
        padding: 14px 16px;
    }
}

/* ---------- Responsive ---------- */

@media (max-width: 700px) {
    .top-nav {
        padding: 0 20px;
        height: 62px;
    }
    .nav-links {
        gap: 16px;
    }
    .nav-links a span.label {
        display: none;
    }
    .content h1 {
        font-size: 58px;
    }
    .brand-logo-hero {
        width: 44px;
        height: 44px;
    }
    .hero {
        padding: 110px 16px 60px;
    }
    .download-card {
        padding: 26px 22px 24px;
    }
    .system-req {
        grid-template-columns: 1fr;
    }
    .content .description {
        font-size: 15.5px;
    }
}

@media (max-width: 420px) {
    .content h1 {
        font-size: 44px;
    }
    .apk-info {
        flex-wrap: wrap;
    }
    .apk-info .badge {
        margin-left: 0;
    }
}