/* ============================================================
   Trainer — styles. Dark, mobile-first, zero dependencies.
   ============================================================ */

:root {
  --bg: #0d1117;
  --bg-elev: #161b22;
  --bg-elev2: #1c2330;
  --border: #2a3240;
  --text: #e6edf3;
  --text-dim: #a6b2bf;
  --text-faint: #97a2b1;
  --accent: #4ade80;
  --accent-dim: #22c55e;
  --accent-ink: #052e16;
  --amber: #fbbf24;
  --red: #f87171;
  --blue: #60a5fa;
  --radius: 14px;
  --tabbar-h: 62px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { -webkit-text-size-adjust: 100%; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  line-height: 1.45;
  min-height: 100vh;
  overscroll-behavior-y: none;
}

button { font: inherit; color: inherit; background: none; border: none; cursor: pointer; -webkit-tap-highlight-color: transparent; }
input, select { font: inherit; }

#app { max-width: 560px; margin: 0 auto; min-height: 100vh; display: flex; flex-direction: column; }

/* ---------- top bar ---------- */
#topbar {
  display: flex; align-items: center; justify-content: space-between;
  padding: calc(10px + env(safe-area-inset-top)) 16px 10px;
  position: sticky; top: 0; z-index: 10;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(8px);
}
.brand { display: flex; align-items: center; gap: 8px; font-weight: 700; font-size: 1.05rem; letter-spacing: 0.02em; }
.brand svg { color: var(--accent); }
.week-badge { font-size: 0.78rem; color: var(--text-dim); background: var(--bg-elev); border: 1px solid var(--border); padding: 4px 10px; border-radius: 999px; }
.week-badge.deload { color: var(--amber); border-color: var(--amber); }

/* ---------- main ---------- */
#view { flex: 1; padding: 4px 16px calc(var(--tabbar-h) + 24px + env(safe-area-inset-bottom)); outline: none; }

h2.view-title { font-size: 1.35rem; margin: 10px 0 2px; }
.view-sub { color: var(--text-dim); font-size: 0.9rem; margin-bottom: 14px; }

.card {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
  margin-bottom: 14px;
}
.card h3 { font-size: 0.95rem; margin-bottom: 8px; }
.card .kicker { font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.08em; color: var(--text-faint); margin-bottom: 4px; }
.card p { font-size: 0.9rem; color: var(--text-dim); }
.card p + p { margin-top: 8px; }

.card.hero { background: linear-gradient(145deg, #14261b, #101a2a); border-color: #2b4a36; }
.card.hero .session-name { font-size: 1.5rem; font-weight: 800; margin: 2px 0; }
.card.hero .tagline { color: var(--accent); font-size: 0.85rem; margin-bottom: 10px; }

.exercise-preview { list-style: none; margin: 10px 0 4px; }
.exercise-preview li { display: flex; justify-content: space-between; gap: 10px; padding: 7px 0; border-top: 1px solid rgba(255,255,255,0.05); font-size: 0.88rem; }
.exercise-preview li span:last-child { color: var(--text-dim); white-space: nowrap; }

.btn {
  display: block; width: 100%; text-align: center;
  background: var(--accent); color: var(--accent-ink);
  font-weight: 700; font-size: 1rem;
  padding: 14px; border-radius: 12px; margin-top: 12px;
  transition: transform 0.06s ease;
}
.btn:active { transform: scale(0.98); }
.btn.secondary { background: var(--bg-elev2); color: var(--text); border: 1px solid var(--border); font-weight: 600; }
.btn.ghost { background: none; color: var(--text-dim); border: 1px dashed var(--border); font-weight: 500; }
.btn.danger { background: none; border: 1px solid var(--red); color: var(--red); }
.btn.small { width: auto; display: inline-block; padding: 8px 14px; font-size: 0.85rem; margin-top: 0; }
.btn:disabled { opacity: 0.45; cursor: default; }

.btn-row { display: flex; gap: 10px; }
.btn-row .btn { flex: 1; }

/* streak / stat chips */
.chips { display: flex; gap: 10px; margin-bottom: 14px; }
.chip { flex: 1; background: var(--bg-elev); border: 1px solid var(--border); border-radius: var(--radius); padding: 10px 12px; text-align: center; }
.chip .num { font-size: 1.25rem; font-weight: 800; color: var(--accent); }
.chip .lbl { font-size: 0.7rem; color: var(--text-faint); text-transform: uppercase; letter-spacing: 0.06em; }

/* coach card */
.card.coach { border-left: 3px solid var(--accent); }
.card.coach .kicker { color: var(--accent); }

/* habits */
.habit-list { list-style: none; }
.habit-list li { display: flex; align-items: center; gap: 12px; padding: 4px 0; border-top: 1px solid rgba(255,255,255,0.05); }
.habit-list li:first-child { border-top: none; }
.habit-check {
  flex: none; width: 30px; height: 30px; border-radius: 8px;
  border: 2px solid var(--border); display: grid; place-items: center;
  color: transparent; margin: 8px 0;
}
.habit-text { flex: 1; padding: 10px 0; cursor: pointer; }
.habit-check.done { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); }
.habit-text .h-label { font-size: 0.92rem; }
.habit-text .h-hint { font-size: 0.78rem; color: var(--text-faint); }
li.habit-done .h-label { color: var(--text-dim); text-decoration: line-through; text-decoration-color: rgba(255,255,255,0.3); }

/* ---------- tab bar ---------- */
#tabbar {
  position: fixed; bottom: 0; left: 50%; transform: translateX(-50%);
  width: 100%; max-width: 560px;
  height: calc(var(--tabbar-h) + env(safe-area-inset-bottom));
  padding-bottom: env(safe-area-inset-bottom);
  display: flex;
  background: color-mix(in srgb, var(--bg-elev) 94%, transparent);
  backdrop-filter: blur(10px);
  border-top: 1px solid var(--border);
  z-index: 20;
}
.tab { flex: 1; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 2px; color: var(--text-faint); font-size: 0.68rem; }
.tab.active { color: var(--accent); }

/* ---------- overlays ---------- */
.overlay {
  position: fixed; inset: 0; z-index: 50;
  background: var(--bg);
  overflow-y: auto;
}
.overlay .inner { max-width: 560px; margin: 0 auto; padding: calc(14px + env(safe-area-inset-top)) 16px calc(30px + env(safe-area-inset-bottom)); min-height: 100%; display: flex; flex-direction: column; }
.hidden { display: none !important; }

/* ---------- workout player ---------- */
.player-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 8px; }
.player-head .title { font-weight: 800; font-size: 1.1rem; }
.icon-btn { min-width: 44px; min-height: 44px; padding: 10px; color: var(--text-dim); border-radius: 10px; font-size: 1.05rem; }
.icon-btn:active { background: var(--bg-elev); }

.progress-track { height: 6px; background: var(--bg-elev2); border-radius: 999px; overflow: hidden; margin-bottom: 16px; }
.progress-fill { height: 100%; background: var(--accent); border-radius: 999px; transition: width 0.3s ease; }

.warmup-box { background: var(--bg-elev); border: 1px dashed var(--border); border-radius: var(--radius); padding: 14px 16px; margin-bottom: 14px; }
.warmup-box h4 { font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.07em; color: var(--amber); margin-bottom: 8px; }
.warmup-box ol { padding-left: 18px; font-size: 0.86rem; color: var(--text-dim); }
.warmup-box li { margin: 4px 0; }

.ex-card { background: var(--bg-elev); border: 1px solid var(--border); border-radius: var(--radius); padding: 16px; margin-bottom: 12px; }
.ex-card.current { border-color: var(--accent-dim); }
.ex-card .slot-label { font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.07em; color: var(--text-faint); }
.ex-card .ex-name { font-size: 1.08rem; font-weight: 700; margin: 2px 0 4px; }
.ex-card .target { font-size: 0.84rem; color: var(--text-dim); margin-bottom: 6px; }
.ex-card .suggestion { font-size: 0.84rem; color: var(--accent); margin-bottom: 10px; }
.ex-card .lasttime { font-size: 0.8rem; color: var(--text-faint); margin-bottom: 10px; }

details.cues { margin: 6px 0 12px; }
details.cues summary { font-size: 0.82rem; color: var(--blue); cursor: pointer; list-style: none; }
details.cues summary::before { content: '▸ '; }
details.cues[open] summary::before { content: '▾ '; }
details.cues ul { padding: 8px 0 0 18px; font-size: 0.84rem; color: var(--text-dim); }
details.cues li { margin: 3px 0; }
details.cues .watch { margin-top: 8px; padding: 8px 10px; background: rgba(251,191,36,0.08); border-left: 2px solid var(--amber); border-radius: 6px; font-size: 0.82rem; color: var(--text-dim); }

.set-row { display: flex; align-items: center; gap: 8px; padding: 8px 0; border-top: 1px solid rgba(255,255,255,0.05); }
.set-row .set-num { flex: none; width: 34px; height: 34px; border-radius: 50%; display: grid; place-items: center; background: var(--bg-elev2); font-size: 0.82rem; font-weight: 700; color: var(--text-dim); }
.set-row.done .set-num { background: var(--accent); color: var(--accent-ink); }
.set-row .stepper { display: flex; align-items: center; gap: 2px; background: var(--bg-elev2); border-radius: 10px; }
.set-row .stepper button { width: 42px; height: 46px; font-size: 1.2rem; color: var(--text-dim); }
.set-row .stepper .val { min-width: 56px; height: 46px; display: grid; place-items: center; text-align: center; font-weight: 700; font-size: 0.98rem; color: var(--text); background: none; border-radius: 8px; padding: 0 2px; }
button.val { border: none; cursor: pointer; position: relative; }
button.val::after { content: '✎'; position: absolute; top: 1px; right: 3px; font-size: 0.55rem; color: var(--text-faint); opacity: 0.7; }
.set-row .stepper .val small { display: block; font-size: 0.62rem; font-weight: 400; color: var(--text-faint); text-transform: uppercase; }
.set-row .stepper input.val-input { width: 62px; font-family: inherit; -moz-appearance: textfield; }
.set-row .stepper input.val-input::-webkit-outer-spin-button,
.set-row .stepper input.val-input::-webkit-inner-spin-button { -webkit-appearance: none; margin: 0; }
.set-row .log-btn { flex: none; padding: 9px 12px; background: var(--accent); color: var(--accent-ink); border-radius: 10px; font-weight: 700; font-size: 0.82rem; }
.set-row.done .log-btn { background: var(--bg-elev2); color: var(--text-faint); font-weight: 500; }

.player-nav { display: flex; gap: 10px; margin: 14px 0; }
.player-nav .btn { margin-top: 0; }

/* ---------- rest timer ---------- */
#rest-overlay { background: rgba(8, 12, 18, 0.96); display: grid; place-items: center; }
#rest-overlay.hidden { display: none; }
.rest-box { text-align: center; padding: 24px; width: min(92vw, 420px); }
.rest-box .rest-label { color: var(--text-dim); font-size: 0.9rem; margin-bottom: 14px; }
.rest-ring { position: relative; width: 210px; height: 210px; margin: 0 auto 18px; }
.rest-ring svg { transform: rotate(-90deg); }
.rest-ring .time { position: absolute; inset: 0; display: grid; place-items: center; font-size: 3rem; font-weight: 800; font-variant-numeric: tabular-nums; }
.rest-actions { display: flex; gap: 10px; justify-content: center; }
.rest-actions .btn { width: auto; padding: 12px 22px; margin-top: 0; }
.rest-next { margin-top: 16px; font-size: 0.85rem; color: var(--text-faint); }

/* ---------- finish summary ---------- */
.summary-stats { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin: 14px 0; }
.summary-stats .chip { padding: 14px; }
.pr-flash { background: rgba(74, 222, 128, 0.1); border: 1px solid var(--accent-dim); border-radius: var(--radius); padding: 12px 14px; font-size: 0.88rem; margin-bottom: 10px; }

/* ---------- charts ---------- */
.chart-wrap { margin: 8px 0 2px; }
.chart-wrap svg { display: block; width: 100%; height: auto; }
.chart-empty { color: var(--text-faint); font-size: 0.85rem; padding: 18px 0; text-align: center; }
.measure-form { display: flex; gap: 10px; align-items: flex-end; margin-top: 12px; }
.measure-form .field { flex: 1; }

/* ---------- forms ---------- */
.field { display: block; margin-bottom: 12px; }
.field .f-label { display: block; font-size: 0.78rem; color: var(--text-dim); margin-bottom: 5px; }
.field input, .field select {
  width: 100%; background: var(--bg-elev2); border: 1px solid var(--border);
  color: var(--text); border-radius: 10px; padding: 11px 12px; font-size: 0.95rem;
}
.field input:focus, .field select:focus { outline: none; border-color: var(--accent-dim); }
.field-row { display: flex; gap: 10px; }
.field-row .field { flex: 1; }

.day-picker { display: flex; gap: 6px; margin-bottom: 12px; }
.day-picker button {
  flex: 1; padding: 10px 0; border-radius: 10px; font-size: 0.8rem; font-weight: 600;
  background: var(--bg-elev2); border: 1px solid var(--border); color: var(--text-dim);
}
.day-picker button.on-lift { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); }
.day-picker button.on-cardio { background: var(--blue); border-color: var(--blue); color: #06263f; }

.seg { display: flex; background: var(--bg-elev2); border-radius: 10px; padding: 3px; margin-bottom: 12px; }
.seg button { flex: 1; padding: 9px 4px; border-radius: 8px; font-size: 0.82rem; color: var(--text-dim); }
.seg button.on { background: var(--accent); color: var(--accent-ink); font-weight: 700; }

/* ---------- settings rows ---------- */
.setting-row { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 12px 0; border-top: 1px solid rgba(255,255,255,0.05); }
.setting-row:first-of-type { border-top: none; }
.setting-row .s-text .s-label { font-size: 0.92rem; }
.setting-row .s-text .s-hint { font-size: 0.78rem; color: var(--text-faint); }
.switch { flex: none; width: 48px; height: 28px; border-radius: 999px; background: var(--bg-elev2); border: 1px solid var(--border); position: relative; transition: background 0.15s; }
.switch::after { content: ''; position: absolute; top: 2px; left: 2px; width: 22px; height: 22px; border-radius: 50%; background: var(--text-dim); transition: left 0.15s, background 0.15s; }
.switch.on { background: var(--accent); border-color: var(--accent); }
.switch.on::after { left: 22px; background: var(--accent-ink); }

/* ---------- history ---------- */
.history-item { display: flex; justify-content: space-between; align-items: center; padding: 10px 0; border-top: 1px solid rgba(255,255,255,0.05); font-size: 0.88rem; }
.history-item .h-date { color: var(--text-faint); font-size: 0.78rem; }
.history-item .h-vol { color: var(--text-dim); font-size: 0.82rem; white-space: nowrap; }

/* ---------- expectations table ---------- */
.expect { list-style: none; }
.expect li { display: flex; gap: 12px; padding: 9px 0; border-top: 1px solid rgba(255,255,255,0.05); font-size: 0.86rem; }
.expect li:first-child { border-top: none; }
.expect .wk { flex: none; width: 74px; font-weight: 700; color: var(--accent); }
.expect .what { color: var(--text-dim); }

/* ---------- onboarding ---------- */
#onboarding { background: var(--bg); }
.ob-step h1 { font-size: 1.6rem; margin: 18px 0 6px; }
.ob-step .ob-lead { color: var(--text-dim); margin-bottom: 20px; font-size: 0.95rem; }
.ob-dots { display: flex; gap: 6px; justify-content: center; margin-top: auto; padding-top: 20px; }
.ob-dots span { width: 8px; height: 8px; border-radius: 50%; background: var(--border); }
.ob-dots span.on { background: var(--accent); }
.equip-option { display: block; width: 100%; text-align: left; background: var(--bg-elev); border: 1px solid var(--border); border-radius: var(--radius); padding: 14px 16px; margin-bottom: 10px; }
.equip-option.on { border-color: var(--accent); background: #14261b; }
.equip-option .eo-label { font-weight: 700; font-size: 0.95rem; }
.equip-option .eo-note { font-size: 0.8rem; color: var(--text-dim); margin-top: 3px; }

/* ---------- toast ---------- */
.toast {
  position: fixed; left: 50%; transform: translateX(-50%);
  bottom: calc(var(--tabbar-h) + 18px + env(safe-area-inset-bottom));
  background: var(--bg-elev2); border: 1px solid var(--border);
  color: var(--text); font-size: 0.88rem;
  padding: 10px 18px; border-radius: 999px; z-index: 100;
  max-width: 90vw; text-align: center;
  animation: toast-in 0.2s ease;
}
@keyframes toast-in { from { opacity: 0; transform: translate(-50%, 8px); } to { opacity: 1; transform: translate(-50%, 0); } }

/* cardio timer */
.cardio-timer { text-align: center; padding: 10px 0; }
.cardio-timer .big { font-size: 2.6rem; font-weight: 800; font-variant-numeric: tabular-nums; }

.muted-note { font-size: 0.78rem; color: var(--text-faint); margin-top: 10px; }
.spacer { height: 8px; }

/* ---------- duration / ETA ---------- */
.est-row { display: flex; flex-wrap: wrap; gap: 8px 16px; margin: 4px 0 12px; font-size: 0.8rem; color: var(--text-dim); }
.est-row span { display: inline-flex; align-items: center; gap: 5px; }
.player-elapsed { font-variant-numeric: tabular-nums; color: var(--text-dim); font-size: 0.9rem; }
.player-eta { font-size: 0.82rem; color: var(--text-dim); margin: -8px 0 14px; font-variant-numeric: tabular-nums; }
.player-eta strong { color: var(--accent); }

/* ---------- today session chooser ---------- */
.card.chooser h3 { margin-bottom: 2px; }
.chooser-row { display: flex; gap: 8px; }
.chooser-btn {
  flex: 1; padding: 11px 4px; border-radius: 10px; font-size: 0.82rem; font-weight: 700;
  background: var(--bg-elev2); border: 1px solid var(--border); color: var(--text-dim);
}
.chooser-btn.on { background: color-mix(in srgb, var(--c) 22%, var(--bg-elev2)); border-color: var(--c); color: var(--text); }

/* ---------- weekly schedule editor ---------- */
.sched-editor { display: flex; flex-direction: column; gap: 12px; }
.sched-day {
  display: grid; grid-template-columns: 44px 1fr; grid-template-areas: 'name time' 'opts opts';
  align-items: center; gap: 8px 8px;
  padding-bottom: 12px; border-bottom: 1px solid rgba(255,255,255,0.05);
}
.sched-day:last-child { border-bottom: none; padding-bottom: 0; }
.sched-dayname { grid-area: name; font-size: 0.82rem; font-weight: 700; color: var(--text-dim); }
.sched-opts { grid-area: opts; display: flex; gap: 5px; }
.sched-opt {
  flex: 1; padding: 11px 2px; border-radius: 9px; font-size: 0.78rem; font-weight: 600;
  background: var(--bg-elev2); border: 1px solid var(--border); color: var(--text-faint); min-width: 0;
}
.sched-opt.on { background: color-mix(in srgb, var(--c) 26%, var(--bg-elev2)); border-color: var(--c); color: var(--text); }
.sched-time {
  grid-area: time; justify-self: end; width: 96px; background: var(--bg-elev2); border: 1px solid var(--border);
  color: var(--text); border-radius: 8px; padding: 8px 6px; font-size: 0.82rem;
}
.sched-time:disabled { opacity: 0.3; }

/* ---------- momentum ---------- */
.momentum-strip { cursor: pointer; }
.mom-strip-top { display: flex; justify-content: space-between; align-items: baseline; gap: 8px; }
.mom-strip-label { font-size: 0.82rem; font-weight: 700; }
.mom-strip-score { font-size: 1.05rem; font-weight: 800; font-variant-numeric: tabular-nums; }
.mom-bar { height: 8px; background: var(--bg-elev2); border-radius: 999px; overflow: hidden; margin: 8px 0 6px; }
.mom-bar-fill { height: 100%; border-radius: 999px; transition: width 0.4s ease; }
.mom-strip-sub { font-size: 0.74rem; color: var(--text-faint); }

.momentum-card h3 { margin-bottom: 6px; }
.mom-gauge-wrap { display: flex; align-items: center; gap: 16px; margin: 4px 0 8px; }
.mom-ring { flex: none; }
.mom-gauge-side { flex: 1; min-width: 0; }
.mom-status { font-size: 1.05rem; font-weight: 800; line-height: 1.2; }
.mom-trend { font-size: 0.8rem; color: var(--text-dim); margin: 4px 0 10px; }
.mom-trend span { color: var(--text-faint); }
.mom-facts { font-size: 0.86rem; color: var(--text-dim); }
.mom-facts strong { color: var(--text); }

/* ---------- logged-today strip ---------- */
.done-strip .kicker { margin-bottom: 8px; }
.done-item { display: flex; align-items: center; gap: 10px; padding: 6px 0; }
.done-dot { flex: none; width: 9px; height: 9px; border-radius: 50%; }
.done-label { font-size: 0.9rem; font-weight: 600; }
.done-meta { margin-left: auto; font-size: 0.78rem; color: var(--text-faint); font-variant-numeric: tabular-nums; }

/* ---------- calendar / log ---------- */
.cal-head { display: flex; align-items: center; justify-content: space-between; margin: 4px 0 10px; }
.cal-month { font-weight: 700; font-size: 1.05rem; }
.cal-grid { display: grid; grid-template-columns: repeat(7, 1fr); gap: 5px; }
.cal-grid.dow { margin-bottom: 5px; }
.cal-dowlbl { text-align: center; font-size: 0.66rem; color: var(--text-faint); text-transform: uppercase; letter-spacing: 0.04em; padding: 2px 0; }
.cal-cell {
  position: relative; aspect-ratio: 1 / 1; border-radius: 10px;
  background: var(--bg-elev); border: 1px solid var(--border);
  display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 3px;
  color: var(--text-dim); padding: 0;
}
.cal-cell.empty { background: none; border: none; }
.cal-cell .cal-num { font-size: 0.82rem; font-weight: 600; }
.cal-cell.today { border-color: var(--accent); }
.cal-cell.today .cal-num { color: var(--accent); }
.cal-cell.selected { background: var(--bg-elev2); border-color: var(--text-dim); box-shadow: 0 0 0 1px var(--text-dim) inset; }
.cal-cell.missed { border-style: dashed; border-color: color-mix(in srgb, var(--red) 55%, var(--border)); }
.cal-dots { display: flex; gap: 3px; min-height: 7px; align-items: center; }
.cal-dot { width: 7px; height: 7px; border-radius: 50%; display: inline-block; }
.cal-dot.ring { background: none; border: 1.5px solid var(--text-faint); width: 8px; height: 8px; }
.cal-dot.missed-ring { border-color: var(--red); }
.cal-legend { display: flex; flex-wrap: wrap; gap: 6px 14px; margin: 14px 2px 2px; font-size: 0.74rem; color: var(--text-faint); }
.cal-legend span { display: inline-flex; align-items: center; gap: 5px; }

.log-block { padding: 10px 0; border-top: 1px solid rgba(255,255,255,0.06); }
.log-block:first-child { border-top: none; padding-top: 2px; }
.log-block-h { font-weight: 700; font-size: 0.95rem; margin-bottom: 2px; }
.log-ex-list { margin-top: 8px; }
.log-ex { display: flex; justify-content: space-between; gap: 12px; padding: 4px 0; font-size: 0.84rem; }
.log-ex span:first-child { color: var(--text-dim); }
.log-ex span:last-child { color: var(--text); font-variant-numeric: tabular-nums; white-space: nowrap; }

@media (min-width: 600px) {
  :root { --radius: 16px; }
  h2.view-title { font-size: 1.5rem; }
}