/* aipbx.bid — site chrome (navbar, footer) and the home page.
   One small stylesheet on purpose: the old style.css is only loaded by the
   pages that still use its layout (docs.php, android.php). */
:root {
    --sx-ink: #0f172a;
    --sx-text: #334155;
    --sx-muted: #64748b;
    --sx-line: #e2e8f0;
    --sx-soft: #f8fafc;
    --sx-primary: #0284c7;
    --sx-primary-dark: #0369a1;
    --sx-green: #059669;
    --sx-radius: 14px;
    --sx-max: 1120px;
}

.sx-page { margin: 0; background: #fff; color: var(--sx-text); font-family: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif; line-height: 1.6; -webkit-font-smoothing: antialiased; }
.sx-page *, .sx-page *::before, .sx-page *::after { box-sizing: border-box; }
.sx-wrap { max-width: var(--sx-max); margin: 0 auto; padding: 0 20px; }
.sx-page a { color: var(--sx-primary); }
.sx-page img { max-width: 100%; }

/* ── Navbar ─────────────────────────────────────────────────────────────── */
.sx-nav { position: sticky; top: 0; z-index: 1000; background: rgba(255, 255, 255, .94); backdrop-filter: blur(12px); border-bottom: 1px solid var(--sx-line); font-family: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif; }
.sx-nav-in { max-width: var(--sx-max); margin: 0 auto; padding: 0 20px; height: 64px; display: flex; align-items: center; gap: 28px; }
.sx-brand { display: flex; align-items: center; gap: 10px; text-decoration: none !important; color: var(--sx-ink) !important; font-weight: 800; font-size: 1.2rem; letter-spacing: -.02em; }
.sx-brand img { width: 32px; height: 32px; }
.sx-links { display: flex; gap: 4px; list-style: none; margin: 0; padding: 0; flex: 1; }
.sx-links a { display: block; padding: 8px 12px; border-radius: 8px; color: var(--sx-text) !important; text-decoration: none !important; font-weight: 600; font-size: .92rem; }
.sx-links a:hover, .sx-links a.active { color: var(--sx-primary) !important; background: #f0f9ff; }
.sx-actions { display: flex; align-items: center; gap: 10px; }
.sx-lang { position: relative; }
.sx-lang-btn { display: flex; align-items: center; gap: 6px; padding: 7px 10px; border: 1px solid var(--sx-line); border-radius: 8px; background: #fff; cursor: pointer; font: inherit; font-weight: 700; font-size: .85rem; color: var(--sx-ink); }
.sx-lang-btn svg { width: 20px; height: 14px; border-radius: 2px; }
.sx-lang-menu { display: none; position: absolute; right: 0; top: calc(100% + 6px); background: #fff; border: 1px solid var(--sx-line); border-radius: 10px; box-shadow: 0 12px 30px rgba(15, 23, 42, .12); padding: 6px; min-width: 160px; }
.sx-lang.open .sx-lang-menu { display: block; }
.sx-lang-menu a { display: flex; align-items: center; gap: 10px; padding: 8px 10px; border-radius: 6px; color: var(--sx-text) !important; text-decoration: none !important; font-size: .9rem; font-weight: 600; }
.sx-lang-menu a:hover, .sx-lang-menu a.active { background: #f0f9ff; color: var(--sx-primary) !important; }
.sx-lang-menu svg { width: 20px; height: 14px; border-radius: 2px; }
.sx-gh { display: inline-flex; align-items: center; gap: 8px; padding: 8px 14px; border-radius: 8px; background: var(--sx-ink); color: #fff !important; text-decoration: none !important; font-weight: 700; font-size: .88rem; }
.sx-gh:hover { background: #1e293b; }
.sx-sponsor { display: inline-flex; align-items: center; gap: 7px; padding: 8px 13px; border-radius: 8px; background: #fff0f5; color: #be185d !important; border: 1px solid #fbcfe8; text-decoration: none !important; font-weight: 700; font-size: .88rem; transition: background .15s, border-color .15s, transform .15s; }
.sx-sponsor:hover { background: #fce7f3; border-color: #f472b6; transform: translateY(-1px); }
.sx-sponsor i { color: #db2777; }
.sx-join { display: inline-flex; align-items: center; gap: 8px; padding: 8px 14px; border-radius: 8px; background: var(--sx-green); color: #fff !important; text-decoration: none !important; font-weight: 700; font-size: .88rem; white-space: nowrap; }
.sx-join:hover, .sx-join.active { background: #047857; }
.sx-burger { display: none; width: 42px; height: 42px; border: 1px solid var(--sx-line); border-radius: 10px; background: #fff; cursor: pointer; align-items: center; justify-content: center; flex-direction: column; gap: 5px; padding: 0; }
.sx-burger span { display: block; width: 20px; height: 2px; background: var(--sx-ink); border-radius: 2px; transition: transform .2s, opacity .2s; }
.sx-nav.open .sx-burger span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.sx-nav.open .sx-burger span:nth-child(2) { opacity: 0; }
.sx-nav.open .sx-burger span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
.sx-mobile { display: none; }

@media (max-width: 1100px) {
    .sx-actions .sx-gh { display: none; }
    .sx-links a { padding: 8px 9px; }
}
@media (max-width: 960px) {
    .sx-actions .sx-sponsor span { display: none; }
    .sx-actions .sx-sponsor { padding: 8px 10px; }
}
@media (max-width: 860px) {
    .sx-nav-in { gap: 12px; }
    .sx-links, .sx-gh, .sx-actions .sx-join, .sx-actions .sx-sponsor { display: none; }
    .sx-actions { margin-left: auto; }
    .sx-burger { display: inline-flex; }
    .sx-nav.open .sx-mobile { display: block; }
    .sx-mobile { border-top: 1px solid var(--sx-line); background: #fff; padding: 8px 20px 18px; max-height: calc(100vh - 64px); overflow-y: auto; }
    .sx-mobile a { display: block; padding: 12px 4px; border-bottom: 1px solid #f1f5f9; color: var(--sx-ink) !important; text-decoration: none !important; font-weight: 600; }
    .sx-mobile a.sx-join { display: flex; justify-content: center; margin: 10px 0 6px; border: 0; padding: 12px 16px; color: #fff !important; }
    .sx-mobile a.sx-sponsor { display: flex; justify-content: center; align-items: center; gap: 8px; margin: 6px 0; border: 1px solid #fbcfe8; background: #fff0f5; color: #be185d !important; padding: 12px 16px; border-radius: 8px; font-weight: 700; }
    .sx-mobile a.sx-gh { display: inline-flex; margin-top: 8px; border: 0; color: #fff !important; padding: 10px 16px; }
}

/* ── Footer ─────────────────────────────────────────────────────────────── */
.sx-footer { border-top: 1px solid var(--sx-line); background: var(--sx-soft); padding: 36px 0; margin-top: 0; font-family: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif; font-size: .9rem; color: var(--sx-muted); }
.sx-footer-in { display: flex; flex-wrap: wrap; gap: 18px 32px; align-items: center; justify-content: space-between; }
.sx-footer-links { display: flex; flex-wrap: wrap; gap: 8px 22px; }
.sx-footer a { color: var(--sx-muted) !important; text-decoration: none !important; font-weight: 600; }
.sx-footer a:hover { color: var(--sx-primary) !important; }

/* ── Home: shared ───────────────────────────────────────────────────────── */
.sx-section { padding: 80px 0; }
.sx-section.alt { background: var(--sx-soft); border-top: 1px solid var(--sx-line); border-bottom: 1px solid var(--sx-line); }
.sx-h2 { font-size: clamp(1.7rem, 3.2vw, 2.3rem); line-height: 1.2; letter-spacing: -.03em; color: var(--sx-ink); margin: 0 0 12px; font-weight: 800; text-align: center; }
.sx-lead { text-align: center; color: var(--sx-muted); max-width: 680px; margin: 0 auto 44px; font-size: 1.05rem; }
.sx-btn { display: inline-flex; align-items: center; gap: 8px; padding: 12px 22px; border-radius: 10px; font-weight: 700; text-decoration: none !important; font-size: .98rem; border: 1px solid transparent; }
.sx-btn-primary { background: var(--sx-primary); color: #fff !important; }
.sx-btn-primary:hover { background: var(--sx-primary-dark); }
.sx-btn-ghost { background: #fff; color: var(--sx-ink) !important; border-color: var(--sx-line); }
.sx-btn-ghost:hover { border-color: var(--sx-primary); color: var(--sx-primary) !important; }

/* Android test strip, top of the home page */
.sx-beta { display: block; background: linear-gradient(90deg, #047857, #059669); color: #fff !important; text-decoration: none !important; }
.sx-beta-in { max-width: var(--sx-max); margin: 0 auto; padding: 11px 20px; display: flex; align-items: center; justify-content: center; gap: 12px; flex-wrap: wrap; font-size: .95rem; text-align: center; }
.sx-beta b { font-weight: 800; }
.sx-beta-btn { background: #fff; color: #047857; border-radius: 999px; padding: 4px 14px; font-weight: 800; font-size: .85rem; white-space: nowrap; }
.sx-beta:hover .sx-beta-btn { background: #ecfdf5; }

/* Hero */
.sx-hero { padding: 72px 0 40px; text-align: center; background: radial-gradient(1200px 400px at 50% -10%, #e0f2fe 0%, rgba(255, 255, 255, 0) 70%); }
.sx-hero h1 { font-size: clamp(2.1rem, 5vw, 3.4rem); line-height: 1.1; letter-spacing: -.04em; color: var(--sx-ink); margin: 0 auto 18px; max-width: 820px; font-weight: 800; }
.sx-hero h1 em { font-style: normal; color: var(--sx-primary); }
.sx-hero p { font-size: 1.15rem; color: var(--sx-muted); max-width: 680px; margin: 0 auto 28px; }
.sx-hero-cta { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }
.sx-hero-meta { margin-top: 18px; font-size: .88rem; color: var(--sx-muted); }
.sx-hero-meta b { color: var(--sx-ink); }
.sx-frame { margin: 48px auto 0; max-width: 1040px; border-radius: 14px; overflow: hidden; border: 1px solid var(--sx-line); box-shadow: 0 30px 70px rgba(15, 23, 42, .16); background: #fff; }
.sx-frame-bar { height: 34px; background: #f1f5f9; border-bottom: 1px solid var(--sx-line); display: flex; align-items: center; gap: 7px; padding: 0 14px; }
.sx-frame-bar i { width: 11px; height: 11px; border-radius: 50%; background: #cbd5e1; display: block; }
.sx-frame img { display: block; width: 100%; height: auto; }

/* Features */
.sx-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.sx-card { background: #fff; border: 1px solid var(--sx-line); border-radius: var(--sx-radius); padding: 22px; }
.sx-card .ico { width: 42px; height: 42px; border-radius: 10px; display: flex; align-items: center; justify-content: center; font-size: 1.1rem; margin-bottom: 14px; color: #fff; }
.sx-card h3 { margin: 0 0 6px; font-size: 1.04rem; color: var(--sx-ink); letter-spacing: -.01em; }
.sx-card p { margin: 0; font-size: .92rem; color: var(--sx-muted); }

/* Screenshots */
.sx-tabs { display: flex; flex-wrap: wrap; gap: 8px; justify-content: center; margin-bottom: 22px; }
.sx-tab { padding: 9px 16px; border-radius: 999px; border: 1px solid var(--sx-line); background: #fff; font: inherit; font-weight: 700; font-size: .9rem; color: var(--sx-text); cursor: pointer; }
.sx-tab.active { background: var(--sx-ink); border-color: var(--sx-ink); color: #fff; }
.sx-shot { display: none; }
.sx-shot.active { display: block; }
.sx-shot figcaption { text-align: center; color: var(--sx-muted); font-size: .92rem; margin-top: 14px; }
.sx-shot .sx-frame { margin-top: 0; }
.sx-phones { display: flex; gap: 22px; justify-content: center; margin-top: 56px; flex-wrap: wrap; }
.sx-phone { width: 210px; border-radius: 26px; border: 8px solid var(--sx-ink); overflow: hidden; box-shadow: 0 20px 40px rgba(15, 23, 42, .18); background: var(--sx-ink); }
.sx-phone img { display: block; width: 100%; height: auto; }

/* Install */
.sx-install { display: grid; grid-template-columns: 1.3fr 1fr; gap: 28px; align-items: start; }
.sx-code { background: var(--sx-ink); color: #e2e8f0; border-radius: var(--sx-radius); padding: 18px 20px; font-family: 'JetBrains Mono', ui-monospace, monospace; font-size: .9rem; position: relative; }
.sx-code code { display: block; white-space: pre-wrap; word-break: break-all; padding-right: 70px; }
.sx-code .c { color: #64748b; }
.sx-copy { position: absolute; top: 12px; right: 12px; border: 1px solid rgba(255, 255, 255, .2); background: rgba(255, 255, 255, .08); color: #e2e8f0; border-radius: 6px; padding: 5px 10px; font: inherit; font-size: .78rem; cursor: pointer; font-family: 'Plus Jakarta Sans', sans-serif; font-weight: 700; }
.sx-copy:hover { background: var(--sx-primary); border-color: var(--sx-primary); }
.sx-steps { list-style: none; margin: 18px 0 0; padding: 0; counter-reset: s; }
.sx-steps li { counter-increment: s; position: relative; padding: 0 0 12px 38px; color: var(--sx-text); }
.sx-steps li::before { content: counter(s); position: absolute; left: 0; top: 0; width: 26px; height: 26px; border-radius: 50%; background: #e0f2fe; color: var(--sx-primary); font-weight: 800; font-size: .85rem; display: flex; align-items: center; justify-content: center; }
.sx-req { background: #fff; border: 1px solid var(--sx-line); border-radius: var(--sx-radius); padding: 22px; }
.sx-req h3 { margin: 0 0 10px; font-size: 1.02rem; color: var(--sx-ink); }
.sx-req ul { margin: 0 0 16px; padding-left: 18px; }
.sx-req li { margin-bottom: 6px; }
.sx-req .sx-btn { width: 100%; justify-content: center; margin-top: 8px; }

/* Mobile apps */
.sx-apps { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; max-width: 860px; margin: 0 auto; }
.sx-app { background: #fff; border: 1px solid var(--sx-line); border-radius: var(--sx-radius); padding: 24px; display: flex; flex-direction: column; gap: 10px; }
.sx-app h3 { margin: 0; color: var(--sx-ink); display: flex; align-items: center; gap: 10px; font-size: 1.1rem; }
.sx-app p { margin: 0; color: var(--sx-muted); font-size: .94rem; flex: 1; }
.sx-app .row { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 6px; }
.sx-app .sx-btn { padding: 10px 16px; font-size: .9rem; }

/* Sponsor section */
.sx-sponsor-box { max-width: 860px; margin: 0 auto; background: linear-gradient(135deg, #fff5f7 0%, #ffffff 50%, #fdf2f8 100%); border: 1px solid #fbcfe8; border-radius: calc(var(--sx-radius) * 1.5); padding: 48px 36px; text-align: center; box-shadow: 0 10px 30px rgba(219, 39, 119, .06); position: relative; overflow: hidden; }
.sx-sponsor-box::before { content: ''; position: absolute; top: -60px; right: -60px; width: 160px; height: 160px; background: radial-gradient(circle, rgba(244, 114, 182, 0.25) 0%, rgba(255, 255, 255, 0) 70%); border-radius: 50%; pointer-events: none; }
.sx-sponsor-icon { width: 56px; height: 56px; margin: 0 auto 18px; background: #fce7f3; color: #db2777; border-radius: 16px; display: flex; align-items: center; justify-content: center; font-size: 1.6rem; box-shadow: 0 4px 12px rgba(219, 39, 119, .15); }
.sx-btn-sponsor { background: #db2777; color: #fff !important; box-shadow: 0 4px 14px rgba(219, 39, 119, .3); border: 1px solid #be185d; }
.sx-btn-sponsor:hover { background: #be185d; transform: translateY(-1px); }
.sx-sponsor-cta { display: flex; justify-content: center; gap: 14px; flex-wrap: wrap; margin-top: 24px; }

/* FAQ */
.sx-faq { max-width: 780px; margin: 0 auto; }
.sx-faq details { border: 1px solid var(--sx-line); border-radius: 12px; padding: 0 20px; margin-bottom: 10px; background: #fff; }
.sx-faq summary { cursor: pointer; list-style: none; padding: 16px 0; font-weight: 700; color: var(--sx-ink); display: flex; justify-content: space-between; gap: 16px; }
.sx-faq summary::-webkit-details-marker { display: none; }
.sx-faq summary::after { content: '+'; color: var(--sx-primary); font-weight: 800; font-size: 1.2rem; line-height: 1; }
.sx-faq details[open] summary::after { content: '−'; }
.sx-faq details p { margin: 0 0 16px; color: var(--sx-muted); }

@media (max-width: 980px) {
    .sx-grid { grid-template-columns: repeat(2, 1fr); }
    .sx-install { grid-template-columns: 1fr; }
}
@media (max-width: 600px) {
    .sx-section { padding: 56px 0; }
    .sx-hero { padding: 44px 0 28px; }
    .sx-grid, .sx-apps { grid-template-columns: 1fr; }
    .sx-frame { margin-top: 32px; border-radius: 10px; }
    .sx-frame-bar { height: 24px; }
    .sx-phone { width: 46%; border-width: 5px; border-radius: 18px; }
    .sx-phones { gap: 12px; }
    .sx-phones .sx-phone:nth-child(3) { display: none; }
}
@media (max-width: 600px) {
    .sx-beta-in { padding: 9px 14px; gap: 8px; font-size: .86rem; }
    .sx-beta-in > i { display: none; }
}