/* Layout: one 820px reading column; tool panel first, plain-language explainer and FAQ below. Home pairs a tear-off calendar leaf with a grid of tool cards. Accent is the red that printed calendars use for Sundays. */
:root {
  --bg: #F3F4F7;
  --surface: #FFFFFF;
  --ink: #161B26;
  --muted: #586072;
  --line: #D9DDE5;
  --accent: #C42F27;
  --accent-ink: #FFFFFF;
  --soft: #FBEEED;
  --f-display: "Bricolage Grotesque", ui-sans-serif, system-ui, sans-serif;
  --f-body: "IBM Plex Sans", ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --f-mono: "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #11141A; --surface: #191D25; --ink: #E8EBF1; --muted: #9AA2B1;
    --line: #2B313C; --accent: #F06A60; --accent-ink: #1A0E0D; --soft: #2A1C1D;
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #11141A; --surface: #191D25; --ink: #E8EBF1; --muted: #9AA2B1;
  --line: #2B313C; --accent: #F06A60; --accent-ink: #1A0E0D; --soft: #2A1C1D;
  color-scheme: dark;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--bg); color: var(--ink); font: 16px/1.6 var(--f-body); }
a { color: var(--accent); }
.wrap { max-width: 820px; margin: 0 auto; padding-inline: 20px; }

header.site { background: var(--surface); border-bottom: 1px solid var(--line); }
header.site .wrap { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 10px 24px; padding-block: 14px; }
.brand { display: flex; align-items: center; gap: 10px; font: 800 1.25rem/1 var(--f-display); color: var(--ink); text-decoration: none; letter-spacing: -0.01em; }
.brand-mark { width: 20px; height: 22px; border: 2px solid var(--ink); border-radius: 3px; position: relative; overflow: hidden; }
.brand-mark::before { content: ""; position: absolute; inset: 0 0 auto 0; height: 6px; background: var(--accent); }
nav.tools { display: flex; flex-wrap: wrap; gap: 4px 18px; font-size: 0.92rem; }
nav.tools a { color: var(--muted); text-decoration: none; padding-block: 4px; }
nav.tools a:hover { color: var(--ink); }
nav.tools a[aria-current="page"] { color: var(--ink); font-weight: 600; box-shadow: inset 0 -2px 0 var(--accent); }

main { padding-block: 40px 64px; }
.eyebrow { font-size: 0.78rem; font-weight: 600; letter-spacing: 0.12em; text-transform: uppercase; color: var(--accent); margin: 0 0 10px; }
h1 { font: 800 clamp(1.9rem, 4.6vw, 2.7rem)/1.08 var(--f-display); letter-spacing: -0.025em; margin: 0 0 12px; text-wrap: balance; }
.lede { color: var(--muted); margin: 0 0 28px; max-width: 60ch; font-size: 1.05rem; }

.panel { background: var(--surface); border: 1px solid var(--line); border-radius: 10px; padding: 24px; }
.fields { display: grid; grid-template-columns: repeat(auto-fit, minmax(210px, 1fr)); gap: 16px; align-items: end; }
.f { display: grid; gap: 6px; min-width: 0; }
.f > span { font-size: 0.76rem; font-weight: 600; letter-spacing: 0.08em; text-transform: uppercase; color: var(--muted); }
input, select { font: 500 1rem var(--f-body); color: var(--ink); background: var(--bg); border: 1px solid var(--line); border-radius: 6px; padding: 10px 12px; width: 100%; min-width: 0; }
input:focus-visible, select:focus-visible, button:focus-visible, a:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.check { display: flex; gap: 10px; align-items: center; font-size: 0.95rem; padding-block: 10px; cursor: pointer; }
.check input { width: 18px; height: 18px; accent-color: var(--accent); }
.btn { font: 600 0.92rem var(--f-body); border: 1px solid var(--line); background: var(--surface); color: var(--ink); border-radius: 6px; padding: 10px 14px; cursor: pointer; }
.btn:hover { border-color: var(--ink); }
.btn.primary { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); }
.actions { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 16px; }

.result { margin-top: 24px; padding-top: 22px; border-top: 1px dashed var(--line); }
.big { font: 800 clamp(2.6rem, 9vw, 4.2rem)/1 var(--f-display); letter-spacing: -0.03em; font-variant-numeric: tabular-nums; margin: 0; }
.big small { font: 500 1.1rem var(--f-body); color: var(--muted); letter-spacing: 0; margin-left: 8px; }
.summary { margin: 10px 0 0; color: var(--muted); max-width: 64ch; }
.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 1px; background: var(--line); border: 1px solid var(--line); border-radius: 8px; overflow: hidden; margin: 20px 0 0; }
.stat { background: var(--surface); padding: 12px 14px; min-width: 0; }
.stat dt { font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.08em; color: var(--muted); }
.stat dd { margin: 3px 0 0; font: 500 1rem var(--f-mono); font-variant-numeric: tabular-nums; overflow-wrap: anywhere; }
.note { font-size: 0.86rem; color: var(--muted); margin: 14px 0 0; }
.error { color: var(--accent); font-weight: 500; }

.prose { margin-top: 52px; max-width: 68ch; }
.prose h2 { font: 800 1.45rem/1.2 var(--f-display); letter-spacing: -0.01em; margin: 40px 0 10px; text-wrap: balance; }
.prose h2:first-child { margin-top: 0; }
.prose h3 { font-size: 1.02rem; margin: 22px 0 4px; }
.prose p, .prose ul { margin: 0 0 12px; }

footer.site { border-top: 1px solid var(--line); padding-block: 24px; color: var(--muted); font-size: 0.88rem; }
footer.site .wrap { display: flex; flex-wrap: wrap; gap: 8px 20px; justify-content: space-between; }
footer.site nav { display: flex; flex-wrap: wrap; gap: 6px 18px; }
footer.site a { color: var(--muted); }

/* Time zones */
.zones { list-style: none; margin: 20px 0 0; padding: 0; border: 1px solid var(--line); border-radius: 8px; overflow: hidden; }
.zone { display: grid; grid-template-columns: minmax(0, 1fr) auto auto; gap: 2px 14px; align-items: center; padding: 12px 8px 12px 14px; border-top: 1px solid var(--line); background: var(--surface); }
.zone:first-child { border-top: 0; }
.zone.src { background: var(--soft); }
.zone .city { font-weight: 600; }
.zone .tag { font-size: 0.7rem; font-weight: 600; letter-spacing: 0.08em; text-transform: uppercase; color: var(--accent); margin-left: 6px; }
.zone .meta, .zone .date { font-size: 0.82rem; color: var(--muted); }
.zone .r { text-align: right; }
.zone .time { font: 600 1.4rem/1.2 var(--f-mono); font-variant-numeric: tabular-nums; }
.zone .shift { color: var(--accent); font-weight: 600; }
.x { border: 0; background: none; color: var(--muted); font-size: 1.3rem; line-height: 1; cursor: pointer; padding: 6px 8px; border-radius: 6px; }
.x:hover { color: var(--accent); }
.zone.src .x { visibility: hidden; }
.addrow { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 14px; }
.addrow input { flex: 1 1 220px; }

/* Calendar converter */
.cals { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 230px), 1fr)); gap: 14px; }
.cal { border: 1px solid var(--line); border-radius: 8px; padding: 16px; display: grid; gap: 12px; align-content: start; min-width: 0; }
.cal h2 { margin: 0; font: 800 1.08rem var(--f-display); }
.cal h2 span { display: block; font: 400 0.8rem var(--f-body); color: var(--muted); }
.cal .row { display: grid; grid-template-columns: 4.6rem minmax(0, 1fr); gap: 6px; }
.cal .row select:nth-child(2) { grid-column: 1 / -1; order: -1; }
.cal .row select, .cal .row input { padding-inline: 8px; }
.cal .out { font-weight: 600; font-size: 0.95rem; }
.cal .native { font-size: 1.05rem; color: var(--muted); }

/* Home */
.hero { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 36px; align-items: center; }
.leaf { width: 216px; background: var(--surface); border: 1px solid var(--line); border-radius: 6px; text-align: center; overflow: hidden; box-shadow: 0 5px 0 -1px var(--surface), 0 5px 0 0 var(--line), 0 10px 0 -2px var(--surface), 0 10px 0 -1px var(--line); }
.leaf .top { background: var(--accent); color: var(--accent-ink); font: 600 0.8rem var(--f-body); letter-spacing: 0.14em; text-transform: uppercase; padding: 9px; }
.leaf .num { font: 800 5.6rem/1 var(--f-display); letter-spacing: -0.04em; padding-top: 16px; font-variant-numeric: tabular-nums; }
.leaf .num.sun { color: var(--accent); }
.leaf .wd { font-weight: 600; margin-top: 4px; }
.leaf .alt { border-top: 1px dashed var(--line); margin-top: 14px; padding: 10px 12px 12px; font-size: 0.82rem; color: var(--muted); display: grid; gap: 2px; }
.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 330px), 1fr)); gap: 16px; margin-top: 44px; }
.card { display: grid; gap: 6px; align-content: start; padding: 20px; border: 1px solid var(--line); border-radius: 10px; background: var(--surface); text-decoration: none; color: var(--ink); transition: border-color .15s, transform .15s; }
.card:hover { border-color: var(--accent); transform: translateY(-2px); }
.card h2 { font: 800 1.22rem var(--f-display); margin: 0; }
.card p { margin: 0; color: var(--muted); font-size: 0.95rem; }
.card .live { font: 500 0.84rem var(--f-mono); color: var(--accent); margin-top: 6px; }

@media (max-width: 640px) {
  .hero { grid-template-columns: 1fr; }
  .leaf { margin: 4px auto 8px; }
  .panel { padding: 18px; }
}
@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; }
}