/* ============================================================================
   OneTap — onetap.llc
   Design tokens mirror the app (core/theme/Color.kt). Primary font: Inter.
   Mono accent: JetBrains Mono (security/technical labels).
   ========================================================================== */

:root {
    /* Brand */
    --navy:            #123E7C;
    --navy-700:        #0E3467;
    --navy-deep:       #092a57;
    --blue:            #2563EB;
    --blue-50:         #EFF6FF;

    /* Neutrals (slate) dark: #0F172A*/
    --bg:              #F8FAFC;
    --surface:         #FFFFFF;
    --surface-variant: #EFF6FF;
    --dark:            #092a57;
    --dark-surface:    #1E293B;
    --dark-variant:    #334155;
    --sky:             #f5f9ff;

    /* Status */
    --success:         #16A34A;
    --success-bg:      #DCFCE7;
    --error:           #DC2626;

    /* Text */
    --text:            #111827;
    --text-2:          #6B7280;
    --text-on-dark:    #F9FAFB;
    --border:          #E2E8F0;

    /* Type */
    --font:  'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --mono:  'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, monospace;

    /* Layout */
    --maxw:  1140px;
    --radius: 16px;
    --radius-sm: 10px;
    --shadow: 0 1px 2px rgba(15,23,42,.04), 0 8px 24px rgba(15,23,42,.06);
    --shadow-lg: 0 12px 40px rgba(18,62,124,.14);
}

/* ── Reset / base ─────────────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
    font-family: var(--font);
    color: var(--text);
    background: var(--bg);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
}
img, svg { display: block; max-width: 100%; }
a { color: var(--blue); text-decoration: none; }
a:hover { text-decoration: underline; }
h1, h2, h3, h4 { line-height: 1.15; color: var(--text); font-weight: 700; letter-spacing: -0.02em; }

.container { width: 100%; max-width: var(--maxw); margin-inline: auto; padding-inline: 24px; }
.mono { font-family: var(--mono); font-weight: 500; }

/* ── Buttons ──────────────────────────────────────────────────────────────── */
.btn {
    display: inline-flex; align-items: center; gap: .5rem;
    font-weight: 600; font-size: .95rem; line-height: 1;
    padding: .8rem 1.35rem; border-radius: 999px; border: 1px solid transparent;
    cursor: pointer; transition: transform .12s ease, box-shadow .12s ease, background .12s ease;
    text-decoration: none; white-space: nowrap;
}
.btn:hover { text-decoration: none; transform: translateY(-1px); }
.btn-primary { background: var(--navy); color: #fff; /*box-shadow: 0 6px 18px rgba(18,62,124,.24);*/ }
.btn-primary:hover { background: var(--navy-700); }
.btn-ghost { background: transparent; color: var(--navy); border-color: var(--border); }
.btn-ghost:hover { background: var(--surface-variant); }
.btn-light { background: #fff; color: var(--navy); }
.btn-lg { padding: 1rem 1.7rem; font-size: 1.02rem; }

/* ── Header / nav ─────────────────────────────────────────────────────────── */
.site-header {
    position: sticky; top: 0; z-index: 50;
    background: rgba(248,250,252,.82); backdrop-filter: saturate(180%) blur(12px);
    border-bottom: 1px solid transparent; transition: border-color .2s, background .2s;
}
.site-header.scrolled { border-bottom-color: var(--border); background: rgba(255,255,255,.9); }
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 68px; }
.brand { display: inline-flex; align-items: center; gap: .6rem; color: var(--text); font-weight: 800; letter-spacing: -0.03em; font-size: 1.2rem; }
.brand:hover { text-decoration: none; }
.brand-mark { border-radius: 9px; }
.site-nav { display: flex; align-items: center; gap: 2rem; }
.site-nav > a { color: var(--text-2); font-weight: 500; font-size: .95rem; }
.site-nav > a:hover { color: var(--text); text-decoration: none; }
.site-nav > a.active { color: var(--navy); font-weight: 600; }
.nav-cta { color: #fff !important; }
.nav-toggle { display: none; }

/* ── Section scaffolding ──────────────────────────────────────────────────── */
section { padding: 75px 0; }
.eyebrow {
    font-family: var(--mono); font-size: .78rem; font-weight: 600; letter-spacing: .12em;
    text-transform: uppercase; color: var(--blue); margin-bottom: .9rem;
}
.eyebrow.mtav {font-size: 1rem}
.section-head { max-width: 720px; margin-bottom: 52px; }
.section-head.center { margin-inline: auto; text-align: center; }
.section-head h2 { font-size: clamp(1.8rem, 3.2vw, 2.5rem); }
.section-head p { color: var(--text-2); font-size: 1.1rem; margin-top: 1rem; }
.lead { font-size: 1.15rem; color: var(--text-2); }

/* ── Hero ─────────────────────────────────────────────────────────────────── */
.hero { position: relative; padding: 75px 0 75px; overflow: hidden; }
.hero::before {
    content: ""; position: absolute; inset: 0; z-index: -1;
    background:
        radial-gradient(60% 60% at 78% 8%, rgba(37,99,235,.10), transparent 60%),
        radial-gradient(50% 50% at 6% 92%, rgba(18,62,124,.08), transparent 60%);
}
.hero-grid { display: grid; grid-template-columns: 1.05fr .95fr; gap: 56px; align-items: center; }
.hero h1 { font-size: clamp(2.2rem, 5vw, 3.5rem); letter-spacing: -0.035em; }
.hero h1 .accent { color: var(--navy); }
.hero p.lead { margin-top: 1.4rem; max-width: 34ch; }
.hero-actions { display: flex; gap: .9rem; margin-top: 2rem; flex-wrap: wrap; }
.hero-trust { display: flex; gap: 1.5rem; margin-top: 2.4rem; flex-wrap: wrap; max-width: 500px}
.hero-trust span { font-family: var(--mono); font-size: .8rem; color: var(--text-2); display: inline-flex; align-items: center; gap: .45rem; font-weight: 600;}
.hero-trust svg { color: var(--success); }

/* Phone mock — screenshot in a device frame + independently-floating cards */
.hero-visual { display: flex; justify-content: center; }
.phone-stage {
    position: relative; width: 100%; max-width: 300px;
    /* isolate transforms so parent doesn't drive children */
    transform-style: preserve-3d;
}

/* Device frame. Swings on its own timeline. */
.phone {
    position: relative; width: 100%; aspect-ratio: 300 / 620;
    background: #0B1220; border-radius: 44px; padding: 11px;
    box-shadow:
        0 2px 0 rgba(255,255,255,.06) inset,
        0 30px 60px -18px rgba(15,23,42,.45),
        0 8px 24px -12px rgba(15,23,42,.35);
    transform-origin: 50% 120%;
    animation: phone-swing 7s ease-in-out infinite;
}
.phone-screen {
    display: block; width: 100%; height: 100%;
    object-fit: cover; object-position: top center;
    border-radius: 33px; background: #F8FAFC;
}
.phone-notch {
    position: absolute; top: 16px; left: 50%; transform: translateX(-50%);
    width: 92px; height: 26px; background: #0B1220; border-radius: 0 0 16px 16px; z-index: 2;
}

/* Floating status cards. Each swings on its own, unlinked from the phone. */
.float-card {
    position: absolute; z-index: 3;
    display: flex; align-items: center; gap: 10px;
    padding: 11px 14px; border-radius: 14px;
    background: var(--surface); border: 1px solid var(--border);
    box-shadow: 0 14px 34px -12px rgba(15,23,42,.30);
    white-space: nowrap;
}
.float-card--tl { top: 16%; left: -46px; animation: float-a 5.5s ease-in-out infinite; }
.float-card--br { bottom: 12%; right: -54px; animation: float-b 6.5s ease-in-out infinite; }
.fc-icon {
    flex: none; width: 30px; height: 30px; border-radius: 9px;
    display: grid; place-items: center;
}
.fc-icon--ok   { background: var(--success); }
.fc-icon--blue { background: var(--blue); }
.fc-text { display: flex; flex-direction: column; line-height: 1.25; font-size: .82rem; color: var(--text-2); }
.fc-text strong { color: var(--text); font-size: .9rem; font-weight: 700; }

@keyframes phone-swing {
    0%, 100% { transform: rotate(-1.6deg) translateY(0); }
    50%      { transform: rotate(1.6deg)  translateY(-6px); }
}
@keyframes float-a {
    0%, 100% { transform: translateY(0) rotate(-1deg); }
    50%      { transform: translateY(-12px) rotate(1.5deg); }
}
@keyframes float-b {
    0%, 100% { transform: translateY(0) rotate(1deg); }
    50%      { transform: translateY(10px) rotate(-1.5deg); }
}
@media (prefers-reduced-motion: reduce) {
    .phone, .float-card--tl, .float-card--br { animation: none; }
}

/* ── Cards / grids ────────────────────────────────────────────────────────── */
.grid { display: grid; gap: 22px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.card {
    background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
    padding: 28px; box-shadow: var(--shadow); transition: transform .15s ease, box-shadow .15s ease;
}
.card:hover { transform: translateY(-3px); box-shadow: var(--shadow-lg); }
.card h3 { font-size: 1.2rem; margin-bottom: .6rem; }
.card p { color: var(--text-2); font-size: .96rem; }
.card .tag {
    display: inline-block; font-family: var(--mono); font-size: .72rem; font-weight: 600;
    color: var(--blue); background: var(--blue-50); padding: .3rem .6rem; border-radius: 6px; margin-bottom: .9rem;
    letter-spacing: .02em;
}
.icon-badge {
    width: 46px; height: 46px; border-radius: 12px; background: var(--surface-variant);
    color: var(--navy); display: grid; place-items: center; margin-bottom: 1rem;
}
.icon-badge svg { width: 24px; height: 24px; }

/* Section tints */
.section-alt { background: var(--surface); border-block: 1px solid var(--border); }
.section-dark { background: var(--dark); color: var(--text-on-dark); }
.section-dark h2, .section-dark h3 { color: #fff; }
.section-dark .eyebrow { color: #7DA9FF; }
.section-dark .section-head p { color: #aac0d9;}
.section-dark .card {
    background: var(--dark-surface); border-color: var(--dark-variant); box-shadow: none;
}
.section-dark .card p { color: #aac0d9; }
.section-sky { background: var(--sky);}

/* ── Feature / verification list ──────────────────────────────────────────── */
.layer { display: grid; grid-template-columns: auto 1fr; gap: 18px; align-items: start; padding: 22px 0; border-top: 1px solid var(--border); }
.layer:first-child { border-top: 0; }
.layer .num { font-family: var(--mono); font-weight: 600; color: #7DA9FF; font-size: .95rem; padding-top: 2px; }
.layer h3 { font-size: 1.15rem; }
.layer .tag { font-family: var(--mono); font-size: .85rem; color: var(--text-2); display: inline-block; margin-bottom: .35rem; }
.layer p { color: var(--text-2); margin-top: .25rem; }
.section-dark .layer { border-color: var(--dark-variant); }
.section-dark .layer .tag { color: #7DA9FF; }
.section-dark .layer p { color: #aac0d9; /*color: #94A3B8;*/ }
.layer.reveal.in h2 {font-weight: 600}

/* ── Checklist ────────────────────────────────────────────────────────────── */
.checklist { display: grid; gap: 14px; list-style: none; padding: 0; }
.checklist li { display: grid; grid-template-columns: 26px 1fr; gap: 12px; align-items: start; }
.checklist svg { color: var(--success); margin-top: 3px; }
.checklist span { color: var(--text); }

/* ── Roadmap ──────────────────────────────────────────────────────────────── */
.pill {
    display: inline-block; font-family: var(--mono); font-size: .72rem; font-weight: 600;
    padding: .28rem .7rem; border-radius: 999px; letter-spacing: .04em;
    background: rgba(37,99,235,.12); color: #93B4FF;
}
.pill.next { background: rgba(22,163,74,.16); color: #86EFAC; }

/* ── Use-case sectors ─────────────────────────────────────────────────────── */
.sector h3 { font-size: 1.12rem; margin-bottom: .35rem; }
.sector .who { font-family: var(--mono); font-size: .76rem; color: var(--blue); margin-bottom: .7rem; }
.sector p { color: var(--text-2); font-size: .94rem; }

/* ── CTA band ─────────────────────────────────────────────────────────────── */
.cta-band { background: linear-gradient(135deg, var(--navy), #1D4ED8); color: #fff; border-radius: 24px; padding: 56px; text-align: center; }
.cta-band h2 { color: #fff; font-size: clamp(1.6rem, 3vw, 2.2rem); }
.cta-band p { color: rgba(255,255,255,.85); margin: 1rem auto 2rem; max-width: 52ch; }

/* ── Forms ────────────────────────────────────────────────────────────────── */
.form { display: grid; gap: 18px; max-width: 560px; }
.field { display: grid; gap: .45rem; }
.field label { font-weight: 600; font-size: .9rem; }
.field input, .field textarea, .field select {
    font-family: var(--font); font-size: 1rem; color: var(--text);
    padding: .8rem .9rem; border: 1px solid var(--border); border-radius: var(--radius-sm);
    background: var(--surface); width: 100%; transition: border-color .12s, box-shadow .12s;
}
.field input:focus, .field textarea:focus, .field select:focus {
    outline: none; border-color: var(--blue); box-shadow: 0 0 0 3px rgba(37,99,235,.15);
}
.field textarea { min-height: 130px; resize: vertical; }
.hp { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }
.alert { padding: 14px 16px; border-radius: var(--radius-sm); font-size: .95rem; }
.alert-ok { background: var(--success-bg); color: #166534; border: 1px solid #86EFAC; }
.alert-err { background: #FEE2E2; color: #991B1B; border: 1px solid #FCA5A5; }
.form-note { font-size: .82rem; color: var(--text-2); }

/* ── Split (text + card) ──────────────────────────────────────────────────── */
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: center; }

/* ── Footer ───────────────────────────────────────────────────────────────── */
.site-footer { background: var(--dark); color: #CBD5E1; padding: 64px 0 34px; margin-top: 20px; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 36px; }
.site-footer .brand-name { color: #fff; }
.footer-tag { color: #aac0d9; margin-top: .8rem; max-width: 32ch; font-size: .94rem; }
.footer-domain { color: #64748B; margin-top: .5rem; font-size: .82rem; }
.footer-col h4 { color: #fff; font-size: .82rem; text-transform: uppercase; letter-spacing: .08em; margin-bottom: 1rem; }
.footer-col a { display: block; color: #aac0d9; font-size: .92rem; margin-bottom: .6rem; }
.footer-col a:hover { color: #fff; text-decoration: none; }
.footer-bottom { margin-top: 44px; padding-top: 24px; border-top: 1px solid var(--dark-variant); display: flex; justify-content: space-between; gap: 24px; flex-wrap: wrap; }
.footer-bottom p { color: #64748B; font-size: .82rem; }
.footer-disclaimer { max-width: 62ch; }

/* ── Reveal animation ─────────────────────────────────────────────────────── */
.reveal { opacity: 0; transform: translateY(14px); transition: opacity .5s ease, transform .5s ease; }
.reveal.in { opacity: 1; transform: none; }

/* ── Responsive ───────────────────────────────────────────────────────────── */
@media (max-width: 900px) {
    .hero-grid, .split { grid-template-columns: 1fr; }
    .hero-visual { order: -1; }
    .grid-3 { grid-template-columns: repeat(2, 1fr); }
    .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 680px) {
    section { padding: 50px 0; }
    .hero { padding: 56px 0 48px; }
    .phone-stage { max-width: 260px; }
    .float-card { padding: 9px 12px; }
    .float-card--tl { left: -18px; }
    .float-card--br { right: -22px; }
    .grid-2, .grid-3 { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr; }
    .cta-band { padding: 40px 24px; }

    .nav-toggle {
        display: inline-flex; flex-direction: column; justify-content: center; gap: 5px;
        width: 44px; height: 44px; background: none; border: 0; cursor: pointer; padding: 0;
    }
    .nav-toggle span { width: 22px; height: 2px; background: var(--text); border-radius: 2px; transition: transform .2s, opacity .2s; }
    .nav-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
    .nav-toggle.open span:nth-child(2) { opacity: 0; }
    .nav-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

    .site-nav {
        position: fixed; inset: 68px 0 auto 0; flex-direction: column; align-items: stretch; gap: 0;
        background: var(--surface); border-bottom: 1px solid var(--border);
        padding: 12px 24px 20px; transform: translateY(-120%); transition: transform .25s ease;
        box-shadow: var(--shadow); max-height: calc(100vh - 68px); overflow-y: auto;
    }
    .site-nav.open { transform: none; }
    .site-nav > a { padding: 14px 0; border-bottom: 1px solid var(--border); }
    .nav-cta { margin-top: 14px; justify-content: center; }
    .footer-bottom { flex-direction: column; }
}

@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
    * { transition: none !important; animation: none !important; }
}