/* Expansion — training timer. Dark-first, thumb-friendly, safe-area aware. */
:root {
  --bg: #0b0e14;
  --bg-elev: #141926;
  --bg-elev-2: #1c2233;
  --line: #263049;
  --text: #e8ecf6;
  --muted: #8b96b0;
  --accent: #4ade80;      /* work */
  --accent-dim: #17351f;
  --rest: #38bdf8;        /* rest */
  --prep: #fbbf24;        /* count-in */
  --danger: #f87171;
  --radius: 16px;
  --tabbar-h: 62px;
}

* { box-sizing: border-box; -webkit-tap-highlight-color: transparent; }

html, body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.45 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, system-ui, sans-serif;
  overscroll-behavior-y: none;
}

body {
  min-height: 100svh;
  padding-bottom: calc(var(--tabbar-h) + env(safe-area-inset-bottom));
}

main { max-width: 620px; margin: 0 auto; padding: 0 18px; }

.view { padding-top: calc(env(safe-area-inset-top) + 14px); }

.topbar { margin: 0 0 14px; }
.topbar h1 { font-size: 22px; letter-spacing: -0.02em; margin: 0; }
.sub { margin: 4px 0 0; color: var(--muted); font-size: 14px; }

/* ── timer stage ───────────────────────────────────────────── */
.stage { display: flex; flex-direction: column; align-items: center; gap: 16px; }

.ring-wrap { position: relative; width: min(78vw, 320px); aspect-ratio: 1; }
.ring { width: 100%; height: 100%; transform: rotate(-90deg); }
.ring circle { fill: none; stroke-width: 10; stroke-linecap: round; }
.ring-track { stroke: var(--bg-elev-2); }
.ring-fill {
  stroke: var(--accent);
  stroke-dasharray: 578.05;      /* 2πr, r=92 */
  stroke-dashoffset: 578.05;
  transition: stroke-dashoffset .18s linear, stroke .25s ease;
}

.ring-body {
  position: absolute; inset: 0;
  display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 2px;
  text-align: center; padding: 0 14%;
}
.phase-label {
  font-size: 12px; letter-spacing: .16em; text-transform: uppercase;
  color: var(--muted); font-weight: 600;
}
.clock {
  font-size: clamp(46px, 15vw, 68px); font-weight: 700; letter-spacing: -0.03em;
  font-variant-numeric: tabular-nums; line-height: 1.05;
}
.exercise { font-size: 15px; color: var(--text); font-weight: 600; }

body.is-rest .ring-fill { stroke: var(--rest); }
body.is-prep .ring-fill { stroke: var(--prep); }
body.is-done .ring-fill { stroke: var(--accent); }

.counters { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; width: 100%; }
.counter, .stat {
  background: var(--bg-elev); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 10px 6px; text-align: center;
}
.counter span, .stat span {
  display: block; font-size: 20px; font-weight: 700; font-variant-numeric: tabular-nums;
}
.counter small, .stat small {
  display: block; color: var(--muted); font-size: 11px; text-transform: uppercase; letter-spacing: .08em;
}

.nextup { margin: 0; color: var(--muted); font-size: 14px; }

.segments { display: flex; flex-wrap: nowrap; gap: 3px; width: 100%; }
.seg {
  height: 6px; flex: 1 1 0; min-width: 0; border-radius: 3px;
  background: var(--bg-elev-2); transition: background .2s ease;
}
.seg.done { background: var(--accent); }
.seg.active { background: var(--accent); box-shadow: 0 0 0 2px var(--accent-dim); }
.seg.round-end { margin-right: 9px; }

.controls { display: grid; grid-template-columns: 1fr 1.4fr 1fr; gap: 10px; width: 100%; }

/* ── buttons & forms ───────────────────────────────────────── */
.btn {
  appearance: none; border: 1px solid var(--line); background: var(--bg-elev);
  color: var(--text); font: inherit; font-weight: 600;
  padding: 14px 12px; border-radius: 14px; cursor: pointer;
  transition: transform .06s ease, background .15s ease, opacity .15s ease;
}
.btn:active { transform: scale(.97); }
.btn.primary { background: var(--accent); border-color: var(--accent); color: #08170d; }
.btn.ghost { background: var(--bg-elev); }
.btn.small { padding: 9px 12px; font-size: 14px; }
.btn[disabled] { opacity: .45; cursor: default; }

.card {
  background: var(--bg-elev); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 16px; display: flex; flex-direction: column; gap: 14px;
}

.row { display: flex; gap: 10px; flex-wrap: wrap; }
.row > * { flex: 1 1 140px; }
.data-row { margin: 16px 0 8px; }

.field { display: flex; flex-direction: column; gap: 6px; font-size: 13px; color: var(--muted); }
.field b { color: var(--text); }
input[type="text"], input[type="number"], input[type="date"], textarea, select {
  width: 100%; font: inherit; color: var(--text);
  background: var(--bg-elev-2); border: 1px solid var(--line);
  border-radius: 12px; padding: 12px; -webkit-appearance: none;
}
textarea { resize: vertical; }
input:focus, textarea:focus { outline: 2px solid var(--accent); outline-offset: 1px; }
input[type="range"] { width: 100%; accent-color: var(--accent); }

.toggle { display: flex; align-items: center; gap: 10px; font-size: 15px; }
.toggle input { width: 22px; height: 22px; accent-color: var(--accent); }

.section-title { font-size: 13px; text-transform: uppercase; letter-spacing: .1em; color: var(--muted); margin: 20px 0 8px; }
.section-title.flush { margin-top: 0; }

.ex-list { list-style: none; counter-reset: ex; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 8px; }
.ex-list li { display: flex; gap: 8px; align-items: center; }
.ex-list li::before {
  counter-increment: ex; content: counter(ex);
  width: 26px; height: 26px; flex: 0 0 26px; border-radius: 8px;
  background: var(--bg-elev-2); color: var(--muted);
  display: grid; place-items: center; font-size: 12px; font-weight: 700;
}
.ex-list .del {
  flex: 0 0 auto; background: none; border: 0; color: var(--muted);
  font-size: 20px; line-height: 1; padding: 6px 8px; cursor: pointer;
}

.ex-inputs { display: flex; flex-direction: column; gap: 8px; }

/* ── log ───────────────────────────────────────────────────── */
.stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; margin-top: 18px; }

.history { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 8px; }
.history li {
  background: var(--bg-elev); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 12px 14px; display: flex; gap: 12px; align-items: flex-start;
}
.history .h-main { flex: 1; min-width: 0; }
.history .h-date { font-weight: 700; font-size: 15px; }
.history .h-meta { color: var(--muted); font-size: 13px; margin-top: 2px; }
.history .h-notes { font-size: 14px; margin-top: 6px; white-space: pre-wrap; overflow-wrap: anywhere; }
.history .h-edit { background: none; border: 0; color: var(--rest); font: inherit; font-size: 13px; cursor: pointer; padding: 4px; }
.history .empty { color: var(--muted); }

.hint { color: var(--muted); font-size: 12.5px; margin: 0; }

/* ── tab bar ───────────────────────────────────────────────── */
.tabbar {
  position: fixed; left: 0; right: 0; bottom: 0; z-index: 5;
  display: grid; grid-template-columns: repeat(3, 1fr);
  background: rgba(11, 14, 20, .92);
  backdrop-filter: blur(12px);
  border-top: 1px solid var(--line);
  padding-bottom: env(safe-area-inset-bottom);
}
.tab {
  appearance: none; background: none; border: 0; color: var(--muted);
  font: inherit; font-weight: 600; font-size: 13px; padding: 16px 4px; cursor: pointer;
}
.tab.is-active { color: var(--accent); }

/* ── toast ─────────────────────────────────────────────────── */
.toast {
  position: fixed; left: 50%; transform: translateX(-50%);
  bottom: calc(var(--tabbar-h) + env(safe-area-inset-bottom) + 14px);
  background: var(--bg-elev-2); border: 1px solid var(--line);
  padding: 10px 16px; border-radius: 999px; font-size: 14px; z-index: 10;
}

@media (prefers-color-scheme: light) {
  :root {
    --bg: #f6f7fb; --bg-elev: #ffffff; --bg-elev-2: #eef1f7;
    --line: #dde2ee; --text: #10131c; --muted: #5c6780;
    --accent: #15a05a; --accent-dim: #d5f3e2;
  }
  .tabbar { background: rgba(246, 247, 251, .92); }
  .btn.primary { color: #ffffff; }
}

/* ── account / sync ────────────────────────────────────────── */
.account { gap: 10px; }
.account-row { align-items: center; }
.account-row .acct { flex: 1 1 100%; font-size: 14px; overflow-wrap: anywhere; }
.account-row .btn { flex: 0 1 auto; }
#signInForm input { flex: 2 1 180px; }

.media-list { list-style: none; margin: 8px 0 0; padding: 0; display: flex; flex-direction: column; gap: 6px; }
.media-list li {
  display: flex; align-items: center; gap: 8px;
  background: var(--bg-elev-2); border-radius: 10px; padding: 8px 10px; font-size: 14px;
}
.media-list li span { flex: 1; overflow-wrap: anywhere; }
input[type="file"] { font-size: 14px; color: var(--muted); }