/* TimeRibbon site. Light or dark, following the reader's system as the ribbon can
   follow Windows. The tokens are the ribbon's own, from frontend/src/theme.css. */

:root {
    color-scheme: light;
    --bg: #f6f7f9;
    --surface: #ffffff;
    --border: #d5d9e0;
    --text: #15181d;
    --muted: #4a5260;
    --faint: #6b7385;
    --accent: #1f5fbf;
    --on-accent: #ffffff;
    --tint: rgba(31, 95, 191, 0.07);
    --code-bg: rgba(21, 24, 29, 0.05);
    --shadow: 0 20px 50px rgba(21, 24, 29, 0.14);

    --radius: 14px;
    --gutter: 16px;
    --max: 1040px;
    --font: "Segoe UI Variable Text", "Segoe UI", system-ui, sans-serif;
    --font-display: "Segoe UI Variable Display", "Segoe UI", system-ui, sans-serif;
}

@media (prefers-color-scheme: dark) {
    :root {
        color-scheme: dark;
        --bg: #111418;
        --surface: #1a1e24;
        --border: #2d333c;
        --text: #eef1f5;
        --muted: #aab3c0;
        --faint: #7d8694;
        --accent: #7fb0ff;
        --on-accent: #111418;
        --tint: rgba(127, 176, 255, 0.08);
        --code-bg: rgba(255, 255, 255, 0.06);
        --shadow: 0 30px 80px rgba(0, 0, 0, 0.45);
    }
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
    margin: 0;
    background:
        radial-gradient(1200px 600px at 80% -10%, var(--tint), transparent 60%),
        var(--bg);
    color: var(--text);
    font: 17px/1.6 var(--font);
    overflow-x: hidden;
}

a { color: var(--accent); text-underline-offset: 3px; }

img { max-width: 100%; }

.wrap {
    width: 100%;
    max-width: var(--max);
    margin: 0 auto;
    /* Sides only: a shorthand here outranks `section`'s vertical padding. */
    padding-inline: var(--gutter);
}

/* Header */

.site-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding-top: 20px;
    padding-bottom: 20px;
}

.brand {
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--text);
    text-decoration: none;
    font-weight: 600;
    font-size: 1.1rem;
}

.brand img { width: 34px; height: 34px; border-radius: 8px; }

.site-head nav { display: flex; gap: 18px; flex-wrap: wrap; justify-content: flex-end; }

.site-head nav a { color: var(--muted); text-decoration: none; font-size: 0.95rem; }

.site-head nav a:hover,
.site-head nav a:focus-visible { color: var(--text); }

/* Hero */

.hero {
    display: grid;
    grid-template-columns: 1.4fr 1fr;
    gap: 48px;
    align-items: center;
    padding-top: 48px;
    padding-bottom: 48px;
}

.eyebrow {
    display: inline-flex;
    gap: 8px;
    flex-wrap: wrap;
    margin: 0 0 18px;
}

.pill {
    border: 1px solid var(--border);
    background: var(--surface);
    border-radius: 999px;
    padding: 3px 12px;
    font-size: 0.8rem;
    color: var(--muted);
}

h1 {
    font-family: var(--font-display);
    font-size: clamp(2.4rem, 6vw, 4.2rem);
    line-height: 1.02;
    letter-spacing: -0.02em;
    margin: 0 0 20px;
}

.lead { font-size: 1.2rem; color: var(--muted); margin: 0 0 28px; max-width: 34em; }

.lead strong { color: var(--text); font-weight: 600; }

.hero-mark {
    justify-self: center;
    width: min(100%, 256px);
    border-radius: 28px;
    box-shadow: var(--shadow);
}

.cta { display: flex; gap: 12px; flex-wrap: wrap; align-items: center; }

.btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 12px 22px;
    border-radius: 10px;
    border: 1px solid var(--border);
    background: var(--surface);
    color: var(--text);
    text-decoration: none;
    font-weight: 600;
    transition: transform 0.15s ease, border-color 0.15s ease, background 0.15s ease;
}

.btn:hover,
.btn:focus-visible { border-color: var(--accent); transform: translateY(-1px); }

.btn-primary {
    background: var(--accent);
    border-color: transparent;
    color: var(--on-accent);
}

.btn-primary:hover,
.btn-primary:focus-visible { background: color-mix(in srgb, var(--accent) 88%, white); border-color: transparent; }

/* Sections */

section { padding-top: 72px; padding-bottom: 24px; }

h2 {
    font-family: var(--font-display);
    font-size: clamp(1.8rem, 4vw, 2.6rem);
    letter-spacing: -0.015em;
    line-height: 1.1;
    margin: 0 0 16px;
}

.kicker {
    color: var(--accent);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    font-size: 0.78rem;
    margin: 0 0 10px;
}

.prose { max-width: 40em; color: var(--muted); }

.prose p { margin: 0 0 16px; }

.prose strong { color: var(--text); }

/* Features */

.features {
    display: grid;
    /* Nine cards: three to a row, so no row is left with an orphan; one to a row on a phone. */
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 14px;
    margin-top: 28px;
}

.feature {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 20px;
}

.feature h3 { margin: 0 0 8px; font-size: 1.05rem; }

.feature p { margin: 0; color: var(--muted); font-size: 0.95rem; }

/* The screenshot beside what it shows */

.shot {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 40px;
    align-items: start;
    margin-top: 28px;
}

.shot figure { margin: 0; }

.shot-pair {
    display: flex;
    gap: 20px;
    align-items: flex-start;
    justify-content: center;
}

.shot img {
    display: block;
    border-radius: 12px;
    border: 1px solid var(--border);
    box-shadow: var(--shadow);
}

/* Lists */

.two-col {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin-top: 24px;
}

.card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 22px 24px;
}

.card h3 { margin: 0 0 12px; font-size: 1.15rem; }

.card ul { margin: 0; padding-left: 20px; color: var(--muted); }

.card li { margin-bottom: 8px; }

.card li strong { color: var(--text); }

/* Downloads: the house card per platform. TimeRibbon is Windows only, so there is
   one card, centred at a card's width. */

.dl-version {
    display: inline-block;
    margin-top: 4px;
    font-size: 0.85rem;
    color: var(--accent);
    border: 1px solid var(--border);
    border-radius: 999px;
    padding: 4px 14px;
}

.downloads {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 18px;
    margin-top: 28px;
}

.dl-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 24px 20px;
    text-align: center;
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.dl-card .ico { font-size: 30px; }

.dl-card h3 { margin: 4px 0 0; }

.dl-card .req { color: var(--muted); font-size: 0.85rem; margin: 0; }

.dl-card .btn { align-self: center; margin: 14px 0 4px; }

.dl-card .meta { color: var(--muted); font-size: 0.8rem; min-height: 1.2em; margin: 0; }

.dl-card .how { color: var(--muted); font-size: 0.85rem; margin: 8px 0 0; }

.dl-links { text-align: center; margin-top: 20px; font-size: 0.9rem; }

code {
    font-family: "Cascadia Code", Consolas, monospace;
    font-size: 0.88em;
    background: var(--code-bg);
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 1px 6px;
    overflow-wrap: anywhere;
}

/* Support: the house donate section, last before the footer. */

.support .cta { margin-top: 20px; }

.btn-donate img {
    display: block;
    height: 2.7em;
    width: auto;
}

/* Footer */

.site-foot {
    margin-top: 72px;
    padding-top: 28px;
    padding-bottom: 40px;
    border-top: 1px solid var(--border);
    color: var(--faint);
    font-size: 0.9rem;
    display: flex;
    justify-content: space-between;
    gap: 16px;
    flex-wrap: wrap;
}

.site-foot a { color: var(--muted); }

/* Phones */

@media (max-width: 820px) {
    .hero { grid-template-columns: 1fr; gap: 36px; padding-top: 24px; }
    .hero-mark { width: min(60%, 200px); }
    .two-col { grid-template-columns: 1fr; }
    .features { grid-template-columns: 1fr; }
    .shot { grid-template-columns: 1fr; justify-items: center; }
    .site-head nav { gap: 12px; }
}

@media (max-width: 480px) {
    body { font-size: 16px; }
    .site-head nav a.hide-sm { display: none; }
}

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