/* BowlBuddy site. The app is monochrome, like its icon (a white ball on near-black), with
   the system blue accent. The page follows the system appearance; the header button pins
   one with html[data-theme]. */
:root {
    color-scheme: light dark;
    --bg: light-dark(#f5f5f7, #0b0b0c);
    --surface: light-dark(#ffffff, #161618);
    --surface-2: light-dark(#fbfbfd, #1d1d20);
    --line: light-dark(rgba(0, 0, 0, 0.08), rgba(255, 255, 255, 0.08));
    --line-strong: light-dark(rgba(0, 0, 0, 0.16), rgba(255, 255, 255, 0.16));
    --text: light-dark(#1d1d1f, #f5f5f7);
    --text-2: light-dark(#3a3a3c, #d1d1d6);
    --muted: light-dark(#6e6e73, #98989d);
    --accent: light-dark(#0071e3, #2997ff);
    --on-accent: #ffffff;
    --ink: light-dark(#121212, #f5f5f7);
    --on-ink: light-dark(#f5f5f7, #121212);
    --shadow: light-dark(rgba(0, 0, 0, 0.14), rgba(0, 0, 0, 0.6));
    --header: light-dark(rgba(245, 245, 247, 0.78), rgba(11, 11, 12, 0.72));
    --glow: light-dark(rgba(255, 255, 255, 0.95), rgba(255, 255, 255, 0.06));
    --radius: 20px;
    --gutter: clamp(16px, 4vw, 40px);
    --max: 1120px;
    --font: "SF Pro Display", "SF Pro Text", -apple-system, BlinkMacSystemFont, "Helvetica Neue", "Segoe UI", system-ui, sans-serif;
    --rounded: ui-rounded, "SF Pro Rounded", -apple-system, BlinkMacSystemFont, system-ui, sans-serif;
    --mono: "SF Mono", ui-monospace, Menlo, Consolas, monospace;
}
:root[data-theme="light"] { color-scheme: light; }
:root[data-theme="dark"] { color-scheme: dark; }

*, *::before, *::after { box-sizing: border-box; }

html {
    background: var(--bg);
    scroll-behavior: smooth;
    scroll-padding-top: 84px;
    -webkit-text-size-adjust: 100%;
}

body {
    margin: 0;
    font-family: var(--font);
    background: var(--bg);
    color: var(--text);
    line-height: 1.55;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

/* A soft light from the top, behind the whole page. */
body::before {
    content: "";
    position: fixed;
    inset: 0;
    z-index: -1;
    pointer-events: none;
    background:
        radial-gradient(ellipse 70% 50% at 80% -10%, var(--glow), transparent 70%),
        var(--bg);
}

img { display: block; max-width: 100%; height: auto; }
a { color: var(--accent); text-decoration-thickness: 1px; text-underline-offset: 3px; }
a:hover { text-decoration-thickness: 2px; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 6px; }

.wrap {
    width: 100%;
    max-width: var(--max);
    margin: 0 auto;
    padding: 0 var(--gutter);
}

.skip {
    position: absolute;
    left: -999px;
    top: 8px;
    background: var(--accent);
    color: var(--on-accent);
    padding: 8px 14px;
    border-radius: 8px;
    z-index: 100;
}
.skip:focus { left: 8px; }

/* ---------- Header ---------- */
.site-header {
    position: sticky;
    top: 0;
    z-index: 50;
    padding-top: env(safe-area-inset-top);
    background: var(--header);
    backdrop-filter: saturate(160%) blur(18px);
    -webkit-backdrop-filter: saturate(160%) blur(18px);
    transition: box-shadow .3s;
}
.site-header.scrolled { box-shadow: 0 10px 24px -18px var(--shadow); }
.site-header .wrap {
    display: flex;
    align-items: center;
    gap: 20px;
    height: 64px;
}
.brand {
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--text);
    text-decoration: none;
    font-family: var(--rounded);
    font-weight: 700;
    font-size: 1.25rem;
}
.brand img { width: 32px; height: 32px; border-radius: 8px; }
.site-nav { display: flex; gap: 22px; margin-left: auto; align-items: center; }
.site-nav a { color: var(--muted); text-decoration: none; font-size: 0.92rem; }
.site-nav a:hover { color: var(--text); }

.theme-toggle {
    flex: none;
    display: grid;
    place-items: center;
    width: 36px;
    height: 36px;
    padding: 0;
    border-radius: 50%;
    border: 1px solid var(--line-strong);
    background: var(--surface);
    color: var(--text);
    cursor: pointer;
    transition: background .2s, transform .2s;
}
.theme-toggle svg { width: 18px; height: 18px; grid-area: 1 / 1; }
/* light-dark() only takes colors, so the icons switch on the scheme selectors instead. */
.theme-toggle .sun { display: none; }
@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) .theme-toggle .sun { display: block; }
    :root:not([data-theme="light"]) .theme-toggle .moon { display: none; }
}
:root[data-theme="dark"] .theme-toggle .sun { display: block; }
:root[data-theme="dark"] .theme-toggle .moon { display: none; }
.no-js .theme-toggle { display: none; }

.btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    border-radius: 999px;
    padding: 12px 22px;
    font-weight: 600;
    font-size: 1rem;
    text-decoration: none;
    transition: transform .2s, box-shadow .2s, background .2s;
}
.btn-ink { background: var(--ink); color: var(--on-ink); }
.btn-ink:hover { color: var(--on-ink); }
.btn-quiet { background: var(--surface); color: var(--text); box-shadow: inset 0 0 0 1px var(--line-strong); }
.btn-quiet:hover { color: var(--text); }

@media (hover: hover) {
    .theme-toggle:hover { background: var(--surface-2); }
    .btn:hover { box-shadow: 0 8px 26px var(--shadow); transform: translateY(-1px); }
}
.theme-toggle:active, .btn:active, .legal-tabs a:active { transform: scale(.96); transition-duration: .08s; }

@media (max-width: 640px) {
    .site-nav { display: none; }
    .theme-toggle { margin-left: auto; }
}

/* ---------- Shared ---------- */
.kicker {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    font-family: var(--mono);
    font-size: 0.75rem;
    letter-spacing: .12em;
    text-transform: uppercase;
    color: var(--muted);
}
.kicker b { color: var(--text); font-weight: 600; }
.kicker .dash { width: 22px; height: 1px; background: var(--line-strong); }

/* ---------- Home ---------- */
.hero {
    padding: clamp(56px, 10vw, 120px) 0 clamp(48px, 8vw, 96px);
    text-align: center;
}
.hero .icon {
    width: 112px;
    height: 112px;
    margin: 0 auto 28px;
    border-radius: 26px;
    box-shadow: 0 20px 50px -18px var(--shadow);
}
.hero h1 {
    font-family: var(--rounded);
    font-size: clamp(2.5rem, 7vw, 4.4rem);
    line-height: 1.04;
    letter-spacing: -0.02em;
    margin: 0 auto 20px;
    max-width: 14ch;
    text-wrap: balance;
}
.hero p {
    color: var(--muted);
    font-size: clamp(1.08rem, 2.2vw, 1.3rem);
    margin: 0 auto 32px;
    max-width: 40ch;
    text-wrap: pretty;
}
.hero .actions { display: flex; flex-wrap: wrap; gap: 12px; justify-content: center; }
.hero .note { color: var(--muted); font-size: 0.88rem; margin: 18px auto 0; }

.section { padding: clamp(40px, 7vw, 80px) 0; }
.section-head { margin: 0 0 32px; max-width: 640px; }
.section-head h2 {
    font-family: var(--rounded);
    font-size: clamp(1.8rem, 4vw, 2.6rem);
    line-height: 1.1;
    letter-spacing: -0.01em;
    margin: 14px 0 12px;
    text-wrap: balance;
}
.section-head p { color: var(--muted); font-size: 1.1rem; margin: 0; }

.grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(min(100%, 300px), 1fr));
    gap: 16px;
}
.card {
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 24px;
}
.card .glyph {
    display: grid;
    place-items: center;
    width: 40px;
    height: 40px;
    border-radius: 12px;
    background: var(--ink);
    color: var(--on-ink);
    margin-bottom: 16px;
}
.card .glyph svg { width: 22px; height: 22px; }
.card h3 { font-size: 1.1rem; margin: 0 0 6px; }
.card p { color: var(--muted); margin: 0; }

.plans {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(min(100%, 320px), 1fr));
    gap: 16px;
}
.plan {
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 28px;
}
.plan.pro { background: var(--ink); color: var(--on-ink); border-color: transparent; }
.plan h3 { font-family: var(--rounded); font-size: 1.5rem; margin: 0 0 4px; }
.plan .price { color: var(--muted); margin: 0 0 20px; }
.plan.pro .price { color: color-mix(in srgb, var(--on-ink) 65%, transparent); }
.plan ul { margin: 0; padding: 0; list-style: none; display: grid; gap: 10px; }
.plan li { display: flex; gap: 10px; }
.plan li::before { content: "✓"; font-weight: 700; }

.faq { max-width: 760px; }
.faq details { border-bottom: 1px solid var(--line-strong); }
.faq summary {
    cursor: pointer;
    list-style: none;
    display: flex;
    justify-content: space-between;
    gap: 16px;
    padding: 18px 0;
    font-weight: 600;
    font-size: 1.05rem;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; color: var(--muted); font-size: 1.3rem; line-height: 1; transition: rotate .2s; }
.faq details[open] summary::after { rotate: 45deg; }
.faq details p { color: var(--muted); margin: 0 0 18px; }

/* ---------- Footer ---------- */
.site-footer {
    padding: 40px 0 calc(48px + env(safe-area-inset-bottom));
    color: var(--muted);
    font-size: 0.9rem;
    border-top: 1px solid var(--line);
    margin-top: 40px;
}
.site-footer .wrap { display: grid; gap: 16px; }
.site-footer nav { display: flex; flex-wrap: wrap; gap: 8px 22px; }
.site-footer nav a { color: var(--text); text-decoration: none; }
.site-footer nav a:hover { text-decoration: underline; }
.site-footer p { margin: 0; max-width: 80ch; }

/* ---------- Legal ---------- */
.legal {
    max-width: 780px;
    margin: 0 auto;
    padding: 0 var(--gutter) 40px;
}
.legal-hero { padding: clamp(40px, 7vw, 72px) 0 24px; }
.legal-hero h1 {
    font-family: var(--rounded);
    font-size: clamp(2rem, 5vw, 3rem);
    line-height: 1.1;
    letter-spacing: -0.01em;
    margin: 16px 0 24px;
    text-wrap: balance;
}
.legal-tabs { display: flex; flex-wrap: wrap; gap: 10px; }
.legal-tabs a {
    color: var(--text);
    text-decoration: none;
    font-size: 0.92rem;
    font-weight: 500;
    padding: 8px 16px;
    border-radius: 999px;
    background: var(--surface);
    border: 1px solid var(--line-strong);
    transition: background .2s, color .2s, transform .2s;
}
.legal-tabs a:hover { color: var(--on-ink); background: var(--ink); border-color: var(--ink); }
.legal .part-title {
    font-family: var(--rounded);
    font-size: clamp(1.6rem, 4vw, 2.1rem);
    margin: 48px 0 8px;
    padding-top: 24px;
    border-top: 1px solid var(--line-strong);
}
.legal section { padding: 18px 0; color: var(--text-2); }
.legal section.summary {
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 22px 26px;
    margin: 18px 0 8px;
}
.legal section h2 { font-size: 1.2rem; color: var(--text); margin: 0 0 10px; }
.legal section h3 { font-size: 1rem; color: var(--text); margin: 20px 0 6px; }
.legal section p { margin: 0 0 12px; }
.legal section ul { margin: 0 0 12px; padding-left: 1.2em; }
.legal section li { margin: 0 0 6px; }
.legal .muted { color: var(--muted); }

/* ---------- 404 ---------- */
.lost { text-align: center; padding: clamp(80px, 14vw, 160px) 0; }
.lost h1 { font-family: var(--rounded); font-size: clamp(2rem, 5vw, 3rem); margin: 0 0 12px; }
.lost p { color: var(--muted); margin: 0 0 28px; }

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