/* Layout: one page per level; each study is one row of small previews, grouped under series headings. */
:root {
  --bg: #ffffff;
  --surface: #f3f2f0;
  --surface-2: #e9e7e4;
  --ink: #1d1d1d;
  --quiet: #5e5b57;
  --line: #e2e0dc;
  --accent: #F08220;      /* Thrive orange */
  --accent-ink: #b84a00;  /* orange dark enough for text on white */
  --on-accent: #1d1100;
  --ok: #1e6b3a;
  --ok-bg: #e3f2e8;
  --warn: #8a4b00;
  --warn-bg: #fff1dc;
  --old: #8a8784;
  --dark-tile: #151515;
  --shadow: 0 6px 24px rgba(29, 20, 10, .08);
  --heading: 'Sora', system-ui, sans-serif;
  --body: 'Inter', system-ui, -apple-system, 'Segoe UI', sans-serif;
  --tile-h: 96px;
  --hdr: 62px;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #141312; --surface: #1f1d1b; --surface-2: #2a2826; --ink: #f1efec; --quiet: #aaa49d;
    --line: #33302d; --accent: #F59A45; --accent-ink: #ffb06b; --on-accent: #1d1100;
    --ok: #7fd49c; --ok-bg: #1c3326; --warn: #ffc27a; --warn-bg: #3a2a14; --old: #77726d;
    --dark-tile: #000; --shadow: 0 6px 24px rgba(0, 0, 0, .4); color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #141312; --surface: #1f1d1b; --surface-2: #2a2826; --ink: #f1efec; --quiet: #aaa49d;
  --line: #33302d; --accent: #F59A45; --accent-ink: #ffb06b; --on-accent: #1d1100;
  --ok: #7fd49c; --ok-bg: #1c3326; --warn: #ffc27a; --warn-bg: #3a2a14; --old: #77726d;
  --dark-tile: #000; --shadow: 0 6px 24px rgba(0, 0, 0, .4); color-scheme: dark;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--bg); color: var(--ink); font: 15px/1.5 var(--body); }
[hidden] { display: none !important; }
img { max-width: 100%; }
a { color: inherit; }
button, select, input, textarea { font: inherit; color: inherit; }
:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; }
.wrap { max-width: 1240px; margin: 0 auto; padding-left: max(16px, env(safe-area-inset-left, 0px)); padding-right: max(16px, env(safe-area-inset-right, 0px)); }

/* Top bar */
header.top { position: sticky; top: 0; z-index: 20; background: var(--bg); border-bottom: 1px solid var(--line); }
.topin { display: flex; align-items: center; gap: 20px; padding-block: 12px; flex-wrap: wrap; }
.brand { display: flex; align-items: baseline; gap: 10px; text-decoration: none; }
.brand .word { font-family: var(--heading); font-weight: 800; letter-spacing: .14em; font-size: 20px; }
.brand .word span { color: var(--accent); }
.brand .sub { font-size: 13px; color: var(--quiet); }
nav.tabs { display: flex; gap: 4px; flex-wrap: wrap; margin-left: auto; }
nav.tabs a { text-decoration: none; padding: 7px 12px; border-radius: 999px; font-weight: 600; font-size: 14px; color: var(--quiet); }
nav.tabs a:hover { background: var(--surface); color: var(--ink); }
nav.tabs a[aria-current="page"] { background: var(--ink); color: var(--bg); }
nav.tabs .sep { width: 1px; background: var(--line); margin: 4px 6px; }

/* Page intro */
.intro { display: flex; gap: 24px; align-items: flex-end; justify-content: space-between; flex-wrap: wrap; padding-block: 28px 14px; }
.intro h1 { font-family: var(--heading); font-size: clamp(28px, 4vw, 40px); line-height: 1.1; margin: 0; letter-spacing: -.01em; text-wrap: balance; }
.intro p { margin: 6px 0 0; color: var(--quiet); max-width: 64ch; }
.stats { display: flex; gap: 18px; font-variant-numeric: tabular-nums; }
.stat b { display: block; font-family: var(--heading); font-size: 22px; }
.stat span { font-size: 12px; color: var(--quiet); text-transform: uppercase; letter-spacing: .06em; }

/* Home */
.hero { padding-block: 40px 10px; max-width: 760px; }
.hero h1 { font-family: var(--heading); font-size: clamp(30px, 5vw, 48px); line-height: 1.08; margin: 0 0 12px; text-wrap: balance; }
.hero p { color: var(--quiet); font-size: 17px; margin: 0 0 10px; max-width: 62ch; }
.steps { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 14px; margin-top: 24px; }
.step { border: 1px solid var(--line); border-radius: 12px; padding: 16px; }
.step > b { display: block; font-family: var(--heading); margin-bottom: 4px; }
.step p { margin: 0; color: var(--quiet); font-size: 14px; }
.step .n { display: inline-grid; place-items: center; width: 26px; height: 26px; border-radius: 50%; background: var(--accent); color: var(--on-accent); font-weight: 700; font-size: 13px; margin-bottom: 8px; }
.levels { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 16px; margin-top: 30px; }
.lcard { display: flex; gap: 12px; align-items: center; text-decoration: none; border: 1px solid var(--line); border-radius: 12px; padding: 12px; }
.lcard:hover { border-color: var(--ink); }
.lcard .pics { display: flex; flex: none; }
.lcard .pics img { max-width: none; width: 44px; height: 44px; object-fit: cover; border-radius: 6px; border: 2px solid var(--bg); margin-left: -12px; }
.lcard .pics img:first-child { margin-left: 0; }
.lcard b { font-family: var(--heading); font-size: 18px; display: block; }
.lcard small { color: var(--quiet); }
.note { background: var(--surface); border-radius: 12px; padding: 14px 16px; margin-top: 26px; color: var(--quiet); font-size: 14px; max-width: 80ch; }
.note b { color: var(--ink); }

/* Toolbar */
.toolbar { display: flex; flex-wrap: wrap; gap: 10px 16px; align-items: center; padding-block: 12px; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.search { flex: 1 1 200px; min-width: 0; max-width: 280px; height: 38px; border: 1px solid var(--line); border-radius: 8px; padding: 0 12px; background: var(--bg); }
.chips { display: flex; flex-wrap: wrap; gap: 6px; align-items: center; }
.chip { border: 1px solid var(--line); background: var(--bg); border-radius: 999px; padding: 5px 11px; font-size: 13px; cursor: pointer; }
.chip[aria-pressed="true"] { background: var(--surface-2); border-color: var(--ink); font-weight: 600; }
.seg { display: inline-flex; align-items: center; border: 1px solid var(--line); border-radius: 8px; overflow: hidden; }
.seg button { border: 0; background: var(--bg); padding: 6px 10px; font-size: 13px; cursor: pointer; }
.seg button[aria-pressed="true"] { background: var(--ink); color: var(--bg); }
.lbl { font-size: 12px; color: var(--quiet); text-transform: uppercase; letter-spacing: .06em; margin-right: 4px; }
.seg .lbl { padding: 0 6px; margin: 0; }
.check { display: inline-flex; gap: 6px; align-items: center; font-size: 13px; cursor: pointer; }
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; height: 38px; padding: 0 14px; border-radius: 8px; border: 1px solid var(--line); background: var(--bg); font-weight: 600; font-size: 14px; cursor: pointer; text-decoration: none; white-space: nowrap; }
.btn:hover { background: var(--surface); }
.btn.primary { background: var(--accent); border-color: var(--accent); color: var(--on-accent); }
.btn.primary:hover { filter: brightness(1.05); }
.btn.small { height: 32px; font-size: 13px; padding: 0 11px; }
.spacer { flex: 1; }

/* Work mode bar */
.workbar { position: sticky; top: var(--hdr); z-index: 15; background: var(--ink); color: var(--bg); border-radius: 12px; margin-top: 14px; box-shadow: var(--shadow); }
.workin { display: flex; gap: 14px; align-items: center; flex-wrap: wrap; padding: 12px 16px; }
.workin .t { font-weight: 600; }
.bar { flex: 1 1 180px; height: 8px; border-radius: 99px; background: rgba(127, 127, 127, .35); overflow: hidden; min-width: 120px; }
.bar i { display: block; height: 100%; background: var(--accent); width: 0; transition: width .3s; }
.workin .num { font-variant-numeric: tabular-nums; font-size: 14px; opacity: .85; }
.workin .btn { border-color: transparent; }
.workin .btn.ghost { background: transparent; color: var(--bg); border-color: rgba(127, 127, 127, .5); }
.workin .btn.ghost:hover { background: rgba(127, 127, 127, .2); }
.workin .btn[aria-disabled="true"] { opacity: .5; pointer-events: none; }
.worktip { font-size: 13px; opacity: .8; padding: 0 16px 12px; margin-top: -4px; }

/* Series and study rows */
.series { margin-top: 30px; }
.shead { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; padding-bottom: 8px; border-bottom: 2px solid var(--ink); }
.shead h2 { font-family: var(--heading); font-size: 18px; letter-spacing: .08em; text-transform: uppercase; margin: 0; }
.shead .count { color: var(--quiet); font-size: 13px; }
.study { display: grid; grid-template-columns: 180px 1fr; gap: 16px; padding-block: 14px; border-bottom: 1px solid var(--line); align-items: start; }
.sname { min-width: 0; display: flex; flex-direction: column; gap: 2px; align-items: flex-start; }
.sname b { font-family: var(--heading); font-size: 15px; overflow-wrap: anywhere; }
.sname small { color: var(--quiet); font-size: 12px; }
.linkbtn { font-size: 12px; color: var(--accent-ink); background: none; border: 0; padding: 0; cursor: pointer; font-weight: 600; text-decoration: underline; text-underline-offset: 2px; }
.tiles { display: flex; flex-wrap: wrap; gap: 12px; min-width: 0; }

.tile { position: relative; display: flex; flex-direction: column; gap: 5px; text-decoration: none; color: inherit; width: min-content; }
.thumb { position: relative; display: block; height: var(--tile-h); aspect-ratio: var(--ar, 1); max-width: calc(var(--tile-h) * 3.2); border-radius: 6px; overflow: hidden; background: var(--surface-2); box-shadow: 0 0 0 1px var(--line); transition: transform .15s; }
.tile:hover .thumb { transform: translateY(-2px); box-shadow: 0 0 0 2px var(--accent); }
.thumb img { width: 100%; height: 100%; object-fit: cover; display: block; }
.tile.round .thumb { border-radius: 50%; }
.texttile { display: flex; align-items: center; justify-content: center; text-align: center; padding: 6px; font: 600 10px/1.25 var(--heading); height: 100%; color: var(--ink); background: repeating-linear-gradient(135deg, var(--surface) 0 8px, var(--surface-2) 8px 16px); overflow: hidden; overflow-wrap: anywhere; }
.cap { font-size: 11.5px; line-height: 1.25; color: var(--quiet); min-width: 56px; max-width: max(100%, 92px); overflow-wrap: anywhere; }
.badge { position: absolute; top: 4px; left: 4px; z-index: 2; background: rgba(255, 255, 255, .94); color: #1d1d1d; font: 700 9.5px/1 var(--body); padding: 3px 4px; border-radius: 4px; }
.tile.round .badge { top: 10%; left: 10%; }
.done { position: absolute; top: 4px; right: 4px; z-index: 2; width: 20px; height: 20px; border-radius: 50%; background: var(--ok); color: #fff; display: none; place-items: center; font-size: 12px; font-weight: 700; }
body.working .tile.opened .done { display: grid; }
body.working .tile.opened .thumb { opacity: .55; }
.tile.old .thumb { filter: grayscale(1); opacity: .45; }
.oldtag { color: var(--old); font-weight: 600; }
.warntag { color: var(--warn); background: var(--warn-bg); font-weight: 600; border-radius: 4px; padding: 0 4px; }
.trx { position: absolute; top: calc(var(--tile-h) - 24px); right: 4px; z-index: 3; border: 0; border-radius: 99px; background: var(--ink); color: var(--bg); font-size: 10.5px; font-weight: 700; padding: 3px 7px; cursor: pointer; opacity: 0; transition: opacity .15s; }
.tile:hover .trx, .trx:focus-visible { opacity: 1; }
@media (hover: none) { .trx { opacity: 1; } }

.empty { padding: 40px 0; color: var(--quiet); }

/* Photos page */
.pgroup { margin-top: 28px; }
.pgrid { display: grid; grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); gap: 18px; margin-top: 12px; }
.photo { display: flex; flex-direction: column; gap: 6px; min-width: 0; }
.photo .pi { display: block; aspect-ratio: 4 / 3; border-radius: 8px; overflow: hidden; background: var(--surface-2); }
.photo .pi img { width: 100%; height: 100%; object-fit: cover; display: block; }
.photo b { font-size: 13px; overflow-wrap: anywhere; }
.photo small { color: var(--quiet); font-size: 12px; font-variant-numeric: tabular-nums; }
.photo .btn { height: 32px; font-size: 13px; }

/* Training page */
.tgrid { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 22px; margin-top: 20px; }
.tcol h3 { font-family: var(--heading); font-size: 13px; text-transform: uppercase; letter-spacing: .1em; color: var(--quiet); margin: 0 0 10px; }
.vid { display: flex; gap: 12px; align-items: center; padding: 10px; border-radius: 10px; text-decoration: none; border: 1px solid var(--line); margin-bottom: 10px; }
.vid:hover { background: var(--surface); }
.vid .play { flex: none; width: 44px; height: 44px; border-radius: 50%; background: var(--ink); color: var(--bg); display: grid; place-items: center; }
.vid.first { border-color: var(--accent); }
.vid.first .play { background: var(--accent); color: var(--on-accent); }
.vid span { font-weight: 600; font-size: 14px; }
.vid small { display: block; color: var(--quiet); font-weight: 400; font-size: 12px; }

/* Translate drawer */
.drawer { position: fixed; right: max(16px, env(safe-area-inset-right, 0px)); bottom: max(16px, env(safe-area-inset-bottom, 0px)); width: min(380px, calc(100vw - 32px)); background: var(--bg); border: 1px solid var(--line); border-radius: 14px; box-shadow: var(--shadow); z-index: 40; padding: 16px; }
.drawer h4 { margin: 0 24px 4px 0; font-family: var(--heading); font-size: 16px; }
.drawer p { margin: 0 0 10px; font-size: 13px; color: var(--quiet); }
.drawer textarea { width: 100%; min-height: 90px; border: 1px solid var(--line); border-radius: 8px; padding: 8px; background: var(--bg); resize: vertical; }
.drawer .row { display: flex; gap: 8px; margin-top: 10px; flex-wrap: wrap; }
.drawer select { height: 38px; border: 1px solid var(--line); border-radius: 8px; padding: 0 8px; background: var(--bg); flex: 1; }
.drawer .x { position: absolute; top: 8px; right: 10px; border: 0; background: none; font-size: 22px; cursor: pointer; color: var(--quiet); }

.toast { position: fixed; left: 50%; bottom: max(20px, env(safe-area-inset-bottom, 0px)); transform: translateX(-50%); background: var(--ink); color: var(--bg); padding: 10px 16px; border-radius: 10px; font-size: 14px; z-index: 50; max-width: calc(100vw - 32px); box-shadow: var(--shadow); }

footer { margin-top: 60px; border-top: 1px solid var(--line); color: var(--quiet); font-size: 13px; }
footer .wrap { display: flex; gap: 16px; align-items: center; flex-wrap: wrap; padding-block: 20px; }
footer .cru-logo { height: 22px; width: auto; fill: var(--ink); }
footer p { margin: 0; }

.loading { padding: 60px 0; color: var(--quiet); }

@media (max-width: 640px) {
  .study { grid-template-columns: 1fr; gap: 8px; }
  nav.tabs { margin-left: 0; }
  :root { --tile-h: 80px; }
}
@media (prefers-reduced-motion: reduce) { * { transition: none !important; } }