/* Eton Course Schedule. Light theme: black text, Eton red (#b21f29) for actions and the active tab. */
:root {
  --bg: #f6f6f5; --surface: #ffffff; --sunk: #efefed; --ink: #000000; --muted: #4a4a4a; --line: #dcdcd8;
  --accent: #b21f29; --accent-dark: #8e1820; --accent-soft: #f8e8e9; --on-accent: #ffffff;
  --go-bg: #dcefe0; --go-fg: #0f4a22; --go: #2b8a48;
  --lk-bg: #fbf0c4; --lk-fg: #5a4500; --lk: #c99a00;
  --bm-bg: #f6d9d9; --bm-fg: #7a1219; --bm: #b21f29;
  --cl-bg: #e8e8e5; --cl-fg: #333333;
  --rn-bg: #dfe8f0; --rn-fg: #13385a;
  --f-display: "IBM Plex Sans Condensed", "Arial Narrow", system-ui, sans-serif;
  --f-body: "IBM Plex Sans", system-ui, -apple-system, "Segoe UI", sans-serif;
  --f-mono: "IBM Plex Mono", ui-monospace, Menlo, monospace;
  color-scheme: light;
}
* { box-sizing: border-box; }
html, body { background: var(--bg); color: var(--ink); margin: 0; }
body { font: 14px/1.5 var(--f-body); }
a { color: var(--accent); }
button, input, select, textarea { font: inherit; color: inherit; }
h1, h2, h3 { font-family: var(--f-display); margin: 0; text-wrap: balance; }
h2 { font-size: 21px; } h3 { font-size: 15px; }
.mono { font-family: var(--f-mono); font-variant-numeric: tabular-nums; }
.num { font-variant-numeric: tabular-nums; }
.muted { color: var(--muted); }
.small { font-size: 12px; }
.err { color: var(--bm-fg); font-weight: 500; }
.label { font: 600 11px/1.2 var(--f-display); text-transform: uppercase; letter-spacing: .08em; color: var(--muted); }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

/* Bar */
.bar { position: sticky; top: 0; z-index: 20; background: var(--surface); border-bottom: 1px solid var(--line); border-top: 4px solid var(--accent); }
.bar-in { display: flex; flex-wrap: wrap; align-items: center; gap: 8px 18px; padding: 10px 16px 0; max-width: 1400px; margin: 0 auto; }
.brand { display: flex; align-items: baseline; gap: 10px; text-decoration: none; color: var(--ink); }
.brand b { font: 700 19px var(--f-display); }
.brand span { font-size: 12px; color: var(--muted); }
.who { margin-left: auto; display: flex; align-items: center; gap: 10px; font-size: 12px; color: var(--muted); }
.tabs { display: flex; gap: 2px; padding: 0 16px; max-width: 1400px; margin: 0 auto; overflow-x: auto; }
.tabs a { padding: 9px 12px 10px; color: var(--muted); font-weight: 500; border-bottom: 3px solid transparent; white-space: nowrap; text-decoration: none; }
.tabs a[aria-current="page"] { color: var(--ink); border-bottom-color: var(--accent); }
.tabs .count { font: 500 11px var(--f-mono); background: var(--accent); color: var(--on-accent); padding: 0 6px; border-radius: 8px; margin-left: 4px; }
main { max-width: 1400px; margin: 0 auto; padding: 18px 16px 60px; display: grid; grid-template-columns: minmax(0, 1fr); gap: 16px; }
.head { display: flex; flex-wrap: wrap; align-items: flex-end; gap: 10px 16px; }
.head p { margin: 2px 0 0; color: var(--muted); max-width: 72ch; }
.head .right { margin-left: auto; display: flex; gap: 8px; flex-wrap: wrap; align-items: center; }

/* Controls */
.btn { display: inline-block; border: 1px solid var(--line); background: var(--surface); padding: 5px 12px; border-radius: 6px; cursor: pointer; font-weight: 500; white-space: nowrap; text-decoration: none; color: var(--ink); }
.btn:hover { border-color: var(--ink); }
.btn.primary { background: var(--accent); color: var(--on-accent); border-color: var(--accent); }
.btn.primary:hover { background: var(--accent-dark); }
.btn.small { padding: 2px 9px; font-size: 12px; }
.btn.link { border-color: transparent; background: none; color: var(--accent); padding: 0; }
.btn[disabled] { opacity: .45; cursor: not-allowed; }
input[type=text], input[type=password], input[type=date], input[type=number], select, textarea { border: 1px solid var(--line); background: var(--surface); border-radius: 6px; padding: 5px 8px; min-width: 0; }
textarea { width: 100%; min-height: 90px; font: 12px var(--f-mono); }
form.inline { display: inline-flex; gap: 6px; align-items: center; flex-wrap: wrap; margin: 0; }
.actions { display: flex; flex-wrap: wrap; gap: 6px; align-items: center; }

/* Flash */
.flash { padding: 10px 14px; border-radius: 8px; border: 1px solid var(--line); background: var(--surface); }
.flash.ok { border-color: var(--go); background: var(--go-bg); color: var(--go-fg); }
.flash.err { border-color: var(--bm); background: var(--bm-bg); color: var(--bm-fg); }

/* Chips */
.chip { display: inline-flex; align-items: center; font: 600 11px/1 var(--f-display); text-transform: uppercase; letter-spacing: .06em; padding: 4px 7px; border-radius: 4px; white-space: nowrap; }
.s-open { background: var(--sunk); color: var(--ink); }
.s-confirmed { background: var(--go-bg); color: var(--go-fg); }
.s-running { background: var(--rn-bg); color: var(--rn-fg); }
.s-completed, .s-cancelled { background: var(--cl-bg); color: var(--cl-fg); }
.c-new { background: var(--go-bg); color: var(--go-fg); } .c-skip { background: var(--cl-bg); color: var(--cl-fg); } .c-error { background: var(--bm-bg); color: var(--bm-fg); }
.flag { font: 500 11px var(--f-mono); padding: 1px 6px; border-radius: 4px; background: var(--lk-bg); color: var(--lk-fg); overflow-wrap: anywhere; }
.flag.hi { background: var(--bm-bg); color: var(--bm-fg); }

/* Menu */
.menu { display: grid; gap: 12px; grid-template-columns: repeat(auto-fill, minmax(min(100%, 250px), 1fr)); }
.lang { background: var(--surface); border: 1px solid var(--line); border-radius: 8px; overflow: hidden; }
.lang h3 { padding: 9px 12px; border-bottom: 1px solid var(--line); border-left: 4px solid var(--accent); }
.bands { display: grid; grid-template-columns: repeat(3, 1fr); }
.bands a, .bands span { display: grid; gap: 1px; padding: 9px 6px; text-align: center; border-right: 1px solid var(--line); color: var(--accent); font-weight: 500; text-decoration: none; }
.bands > :last-child { border-right: 0; }
.bands a:hover { background: var(--accent-soft); }
.bands span { color: var(--muted); }
.bands small { font: 500 11px var(--f-mono); color: var(--muted); }

/* Group tabs + page */
.crumbs { font-size: 13px; color: var(--muted); }
.crumbs a { font-weight: 500; text-decoration: none; }
.sheettabs { display: flex; gap: 2px; overflow-x: auto; border-bottom: 1px solid var(--line); }
.sheettabs a { display: grid; gap: 1px; border: 1px solid var(--line); border-bottom: 0; background: var(--sunk); padding: 7px 12px; border-radius: 6px 6px 0 0; white-space: nowrap; color: var(--muted); font-weight: 500; text-decoration: none; }
.sheettabs a small { font: 500 11px var(--f-mono); }
.sheettabs a[aria-current="true"] { background: var(--surface); color: var(--ink); box-shadow: inset 0 3px 0 var(--accent); }
.gpage { background: var(--surface); border: 1px solid var(--line); border-top: 0; border-radius: 0 0 8px 8px; }
.ghead { display: flex; flex-wrap: wrap; gap: 8px 24px; justify-content: space-between; padding: 16px 18px; background: var(--sunk); }
.ghead h2 { font-size: 24px; }
.ghead .sub { font: italic 400 17px var(--f-body); color: var(--muted); }
.ghead .right { text-align: right; }
.gbar { padding: 12px 18px; display: flex; gap: 10px 18px; flex-wrap: wrap; align-items: center; }
.progress { display: inline-flex; gap: 3px; vertical-align: middle; }
.progress i { width: 14px; height: 14px; border-radius: 3px; background: var(--sunk); border: 1px dashed var(--line); }
.progress i.c { background: var(--go); border: 0; }
.gfoot { display: grid; gap: 18px; grid-template-columns: repeat(auto-fit, minmax(min(100%, 330px), 1fr)); padding: 16px 18px; border-top: 1px solid var(--line); }
.gfoot.master { background: var(--sunk); }
.facts { display: grid; grid-template-columns: max-content 1fr; gap: 6px 14px; font-size: 13px; margin: 0; }
.facts dt { font: 600 11px var(--f-display); text-transform: uppercase; letter-spacing: .07em; color: var(--muted); padding-top: 2px; }
.facts dd { margin: 0; font-weight: 500; min-width: 0; overflow-wrap: anywhere; }
.box { display: grid; gap: 8px; align-content: start; }
.preview { border: 1px solid var(--line); border-radius: 8px; padding: 10px 12px; display: grid; gap: 6px; font-size: 13px; }
.preview.ok { border-color: var(--go); } .preview.warn { border-color: var(--lk); } .preview.no { border-color: var(--bm); }
.coursename { font: 500 12px var(--f-mono); background: var(--sunk); padding: 6px 8px; border-radius: 6px; overflow-wrap: anywhere; }

/* Tables */
.scroll { overflow-x: auto; }
table { border-collapse: collapse; width: 100%; }
.dt { font-size: 13px; }
.dt th { text-align: left; font: 600 11px var(--f-display); text-transform: uppercase; letter-spacing: .07em; color: var(--muted); padding: 8px 10px; border-bottom: 1px solid var(--line); background: var(--sunk); white-space: nowrap; }
.dt td { padding: 8px 10px; border-bottom: 1px solid var(--line); vertical-align: middle; }
.dt td.n, .dt th.n { text-align: right; }
.students td.paid { background: var(--go-bg); }
.students td.part { background: var(--lk-bg); }
.students td.bad { background: var(--bm-bg); }

/* Panels */
.cols { display: grid; gap: 16px; grid-template-columns: repeat(auto-fit, minmax(min(100%, 440px), 1fr)); align-items: start; }
.panel { background: var(--surface); border: 1px solid var(--line); border-radius: 8px; min-width: 0; }
.panel > header { display: flex; align-items: center; gap: 8px; padding: 12px 14px; border-bottom: 1px solid var(--line); flex-wrap: wrap; }
.panel > header .right { margin-left: auto; display: flex; gap: 6px; align-items: center; flex-wrap: wrap; }
.badge { font: 600 12px var(--f-mono); background: var(--sunk); padding: 1px 7px; border-radius: 9px; }
.pbody { padding: 14px; display: grid; grid-template-columns: minmax(0, 1fr); gap: 12px; }
.empty { padding: 18px 14px; color: var(--muted); }
.row { display: grid; gap: 4px 12px; grid-template-columns: 1fr auto; padding: 10px 14px; border-bottom: 1px solid var(--line); }
.row:last-child { border-bottom: 0; }
.row .r1 { display: flex; flex-wrap: wrap; gap: 6px 10px; align-items: center; min-width: 0; }
.row .r2 { grid-column: 1 / -1; display: flex; flex-wrap: wrap; gap: 6px; align-items: center; font-size: 12px; color: var(--muted); overflow-wrap: anywhere; min-width: 0; }
.form { display: grid; gap: 12px; grid-template-columns: repeat(auto-fit, minmax(min(100%, 170px), 1fr)); }
.form label { display: grid; gap: 4px; font-size: 12px; color: var(--muted); }
.kpis { display: grid; gap: 12px; grid-template-columns: repeat(auto-fit, minmax(min(100%, 180px), 1fr)); }
.kpi { background: var(--surface); border: 1px solid var(--line); border-radius: 8px; padding: 12px 14px; display: grid; gap: 2px; }
.kpi .v { font: 600 28px/1.1 var(--f-mono); }
.kpi .v.bad { color: var(--accent); } .kpi .v.ok { color: var(--go-fg); }
.drop { border: 2px dashed var(--line); border-radius: 8px; padding: 16px; display: grid; gap: 10px; }
.drop.over { border-color: var(--accent); background: var(--accent-soft); }
.note { border: 1px dashed var(--line); border-radius: 8px; padding: 10px 12px; font-size: 12px; color: var(--muted); }
.login { max-width: 360px; margin: 10vh auto; background: var(--surface); border: 1px solid var(--line); border-top: 4px solid var(--accent); border-radius: 8px; padding: 22px; display: grid; gap: 14px; }
.login label { display: grid; gap: 4px; font-size: 12px; color: var(--muted); }
details summary { cursor: pointer; }
@media (max-width: 640px) { .who { margin-left: 0; width: 100%; } }
.actions a.btn { white-space: normal; text-align: left; }
.dt td.mono { white-space: nowrap; }
/* Dashboard */
.stack { display: flex; height: 26px; border-radius: 4px; overflow: hidden; background: var(--sunk); }
.stack span { display: block; height: 100%; }
.legend { display: flex; flex-wrap: wrap; gap: 6px 16px; font-size: 13px; }
.legend span { display: inline-flex; align-items: center; gap: 6px; }
.sw { display: inline-block; width: 12px; height: 12px; border-radius: 3px; }
.meter { display: inline-block; width: 70px; height: 8px; border-radius: 4px; background: var(--sunk); vertical-align: middle; overflow: hidden; }
.meter i { display: block; height: 100%; background: var(--go); }
.mrow { display: grid; grid-template-columns: 70px minmax(0, 1fr); gap: 4px 12px; align-items: center; }
.mrow .small { grid-column: 2; color: var(--muted); }
.mtrack { position: relative; height: 16px; background: transparent; }
.mtrack i, .mtrack b { position: absolute; left: 0; top: 0; bottom: 0; border-radius: 3px; }
.mtrack i { background: var(--sunk); border: 1px solid var(--line); }
.mtrack b { background: var(--go); }