:root {
  --bg: #f6f7f9;
  --panel: #ffffff;
  --text: #1c2430;
  --muted: #6b7686;
  --border: #e2e6ec;
  --accent: #2563eb;
  --good: #15803d;
  --warn: #b45309;
  --bad: #b91c1c;
  --ctl: #2563eb;
  --atl: #db2777;
  --tsb: #ca8a04;
  --tss: #94a3b8;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #11151c;
    --panel: #1a2029;
    --text: #e6e9ee;
    --muted: #93a0b2;
    --border: #2b3442;
    --accent: #60a5fa;
    --good: #4ade80;
    --warn: #fbbf24;
    --bad: #f87171;
    --ctl: #60a5fa;
    --atl: #f472b6;
    --tsb: #facc15;
    --tss: #475569;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 15px/1.45 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

header {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
  justify-content: space-between;
  padding: 16px;
  max-width: 1200px;
  margin: 0 auto;
}

h1 { margin: 0; font-size: 22px; }
h2 { margin: 0 0 12px; font-size: 17px; }
h2 small { color: var(--muted); font-weight: 400; font-size: 13px; margin-left: 6px; }
h3 { font-size: 15px; margin: 20px 0 8px; }

main { max-width: 1200px; margin: 0 auto; padding: 0 16px 40px; display: grid; gap: 16px; }

.panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 16px;
  position: relative;
  min-width: 0;
}

.cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 12px; }
.card { background: var(--panel); border: 1px solid var(--border); border-radius: 10px; padding: 12px 14px; }
.card .label { color: var(--muted); font-size: 13px; }
.card .value { font-size: 26px; font-weight: 600; font-variant-numeric: tabular-nums; }
.card .sub { color: var(--muted); font-size: 12px; }

.good { color: var(--good); }
.warn { color: var(--warn); }
.bad { color: var(--bad); }
.muted { color: var(--muted); }

.chart { position: relative; height: 280px; }

.range { position: absolute; top: 12px; right: 12px; display: flex; gap: 4px; }
.range button { background: transparent; color: var(--muted); border: 1px solid var(--border); padding: 3px 8px; font-size: 12px; }
.range button.on { color: var(--text); border-color: var(--accent); }

button {
  background: var(--accent);
  color: #fff;
  border: 1px solid var(--accent);
  border-radius: 6px;
  padding: 7px 12px;
  font: inherit;
  cursor: pointer;
}
button.secondary { background: transparent; color: var(--accent); }
button:disabled { opacity: .5; cursor: default; }

.sync { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
.pill { font-size: 13px; padding: 3px 10px; border-radius: 999px; border: 1px solid var(--border); color: var(--muted); }

.table-wrap { overflow-x: auto; }
table { border-collapse: collapse; width: 100%; font-variant-numeric: tabular-nums; }
th, td { text-align: left; padding: 6px 8px; border-bottom: 1px solid var(--border); white-space: nowrap; }
th { color: var(--muted); font-weight: 500; font-size: 13px; }

.zones { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 16px; }
.zones h3 { margin-top: 0; }

.grid-form { display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); gap: 10px 16px; }
.grid-form label { display: flex; flex-direction: column; gap: 4px; font-size: 13px; color: var(--muted); }
.grid-form input {
  font: inherit;
  color: var(--text);
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 6px 8px;
}
.actions { display: flex; align-items: end; gap: 10px; }

@media (max-width: 600px) {
  .range { position: static; margin-bottom: 8px; }
  .chart { height: 220px; }
}

/* --- Phase 2 ------------------------------------------------------------- */

[hidden] { display: none !important; }

.login {
  position: fixed;
  inset: 0;
  z-index: 10;
  display: grid;
  place-items: center;
  background: var(--bg);
  padding: 16px;
}
.login-box { display: grid; gap: 12px; width: min(340px, 100%); }
.login-box h1 { margin-bottom: 4px; }
.login-box label { display: grid; gap: 4px; font-size: 13px; color: var(--muted); }

.tabs { display: flex; gap: 4px; }
.tabs button { background: transparent; color: var(--muted); border-color: var(--border); }
.tabs button.on { color: var(--text); border-color: var(--accent); }

input, select, textarea {
  font: inherit;
  color: var(--text);
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 6px 8px;
}
.grid-form select, .grid-form textarea { width: 100%; }
.grid-form .wide { grid-column: 1 / -1; }
button.small { padding: 3px 8px; font-size: 12px; }
.actions { flex-wrap: wrap; margin: 8px 0; }
td.wrap { white-space: normal; min-width: 200px; }
h3 small { font-weight: 400; }

.grid-input input { width: 72px; padding: 4px 6px; }
.key-days td { padding: 4px; text-align: center; }
.day-check { display: inline-flex; flex-direction: column; align-items: center; gap: 2px; font-size: 12px; color: var(--muted); cursor: pointer; }
.day-check input { width: 20px; height: 20px; accent-color: var(--accent); }
.grid-input th { text-align: center; }
.grid-input th:first-child { text-align: left; }

.summary p { margin: 6px 0; }

/* --- Plan calendar --- */
.plan-toolbar { display: flex; flex-wrap: wrap; gap: 8px 16px; align-items: center; justify-content: space-between; margin: 12px 0 8px; }
.seg { display: inline-flex; border: 1px solid var(--border); border-radius: 8px; overflow: hidden; }
.seg button { background: transparent; color: var(--muted); border: none; border-radius: 0; padding: 6px 12px; }
.seg button.on { background: var(--accent); color: #fff; }
.cal-nav { display: flex; align-items: center; gap: 6px; flex-wrap: wrap; }
.cal-nav .small { min-width: 34px; }

.cal { display: grid; grid-template-columns: repeat(7, minmax(0, 1fr)) 120px; border-top: 1px solid var(--border); border-left: 1px solid var(--border); }
.cal > div { border-right: 1px solid var(--border); border-bottom: 1px solid var(--border); min-width: 0; }
.cal-head { font-size: 12px; color: var(--muted); text-align: center; padding: 4px; font-weight: 500; }
.cal-day { min-height: 92px; padding: 4px; display: flex; flex-direction: column; gap: 3px; }
.cal-day.past { background: color-mix(in srgb, var(--bg) 60%, transparent); }
.cal-day.past .w-chip { opacity: .7; }
.cal-day.today { outline: 2px solid var(--accent); outline-offset: -2px; }
.cal-date { font-size: 12px; color: var(--muted); }
.cal-day.today .cal-date { color: var(--accent); font-weight: 700; }
.cal-race { font-size: 11px; font-weight: 600; color: var(--atl); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.w-chip {
  display: block;
  width: 100%;
  text-align: left;
  font-size: 12px;
  line-height: 1.3;
  padding: 3px 5px;
  border-radius: 5px;
  border: 1px solid var(--border);
  border-left: 3px solid var(--tss);
  background: var(--panel);
  color: var(--text);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.w-chip.recovery { border-left-color: var(--good); }
.w-chip.endurance { border-left-color: var(--ctl); }
.w-chip.tempo { border-left-color: var(--tsb); }
.w-chip.threshold, .w-chip.vo2max { border-left-color: var(--atl); }
.w-chip.completed::after { content: " ✓"; color: var(--good); }
.w-chip.missed { text-decoration: line-through; color: var(--muted); }
.cal-week { padding: 6px; font-size: 12px; display: flex; flex-direction: column; gap: 2px; background: var(--bg); }
.cal-week .phase { font-weight: 600; text-transform: capitalize; }
.cal-week .recov { color: var(--good); }

.workout-dialog { border: 1px solid var(--border); border-radius: 12px; background: var(--panel); color: var(--text); max-width: min(560px, calc(100vw - 32px)); width: 100%; padding: 16px; }
.workout-dialog::backdrop { background: rgb(0 0 0 / 40%); }
.workout-dialog .workout { border: none; padding: 0; }
.workout-dialog form { text-align: right; margin-top: 8px; }

@media (max-width: 700px) {
  .cal { grid-template-columns: repeat(7, minmax(0, 1fr)); }
  .cal-head.week-col { display: none; }
  .cal-week { grid-column: 1 / -1; flex-direction: row; flex-wrap: wrap; gap: 4px 10px; padding: 4px 6px; }
  .cal-day { min-height: 70px; padding: 2px; }
  .w-chip { font-size: 11px; padding: 2px 3px; white-space: normal; }
  .w-chip .w-title { display: none; }
}

.plan-days { display: grid; gap: 8px; margin-top: 8px; }
.plan-day { display: grid; grid-template-columns: 90px 1fr; gap: 12px; padding: 8px 0; border-top: 1px solid var(--border); }
.plan-day.past { opacity: .65; }
.plan-day.today .plan-date { color: var(--accent); font-weight: 600; }
.plan-date { font-size: 14px; padding-top: 6px; }

.workout {
  border: 1px solid var(--border);
  border-left: 4px solid var(--tss);
  border-radius: 8px;
  padding: 6px 10px;
  margin-bottom: 6px;
}
.workout.recovery { border-left-color: var(--good); }
.workout.endurance { border-left-color: var(--ctl); }
.workout.tempo { border-left-color: var(--tsb); }
.workout.threshold, .workout.vo2max { border-left-color: var(--atl); }
.workout summary { cursor: pointer; display: flex; flex-wrap: wrap; gap: 4px 10px; align-items: baseline; }
.workout .sport { font-size: 12px; color: var(--muted); text-transform: uppercase; letter-spacing: .03em; }
.workout p { margin: 8px 0; }
.steps { margin: 4px 0 8px; padding-left: 20px; font-size: 14px; }
.badge { margin-left: auto; font-size: 12px; padding: 1px 8px; border-radius: 999px; border: 1px solid var(--border); }

@media (max-width: 600px) {
  .plan-day { grid-template-columns: 1fr; gap: 4px; }
  .badge { margin-left: 0; }
  header { gap: 8px; }
}

/* --- Responsive layout ------------------------------------------------------- */

main { max-width: 1400px; display: block; }
header { max-width: 1400px; }
.page { display: grid; gap: 16px; grid-template-columns: minmax(0, 1fr); margin-bottom: 16px; }
.page > .cards, .page > .span { grid-column: 1 / -1; }

@media (min-width: 1100px) {
  .page:not(.single) { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 700px) {
  body { font-size: 14px; padding-bottom: calc(64px + env(safe-area-inset-bottom)); }
  header { padding: 12px; padding-top: calc(12px + env(safe-area-inset-top)); }
  h1 { font-size: 19px; }
  main { padding: 0 12px 24px; }
  .page { gap: 12px; }
  .panel { padding: 12px; border-radius: 8px; }
  .cards { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 8px; }
  .card { padding: 10px; }
  .card .value { font-size: 22px; }
  .sync { width: 100%; flex-wrap: nowrap; gap: 6px; }
  .sync .pill { flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
  .sync button { padding: 6px 9px; font-size: 14px; white-space: nowrap; }

  /* App-style bottom navigation */
  .tabs {
    position: fixed;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 5;
    background: var(--panel);
    border-top: 1px solid var(--border);
    padding: 6px 8px calc(6px + env(safe-area-inset-bottom));
    justify-content: space-around;
  }
  .tabs button { flex: 1; border: none; font-size: 15px; padding: 10px 4px; }
  .tabs button.on { color: var(--accent); font-weight: 600; }

  .grid-input input { width: 54px; }
  .grid-input th, .grid-input td { padding: 4px 3px; }
  th, td { padding: 5px 6px; font-size: 13px; }
  .grid-form { grid-template-columns: minmax(0, 1fr); }
  input, select, textarea, button { font-size: 16px; } /* no iOS zoom on focus */
  .workout summary { font-size: 14px; }
}

/* --- Coach chat and updates ------------------------------------------------------ */

.banner {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 16px;
  align-items: center;
  justify-content: space-between;
  border: 1px solid var(--accent);
  background: var(--panel);
  border-radius: 10px;
  padding: 10px 14px;
  margin-bottom: 16px;
}
.banner .actions { margin: 0; }

.job-progress {
  position: sticky;
  top: 8px;
  z-index: 4;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 10px 14px;
  margin-bottom: 16px;
  box-shadow: 0 2px 10px rgb(0 0 0 / 8%);
}
.job-row { display: flex; align-items: center; gap: 10px; }
.job-label { flex: 1; min-width: 0; }
.job-time { font-variant-numeric: tabular-nums; white-space: nowrap; }
.bar { height: 6px; border-radius: 999px; background: var(--border); overflow: hidden; margin-top: 8px; }
.bar-fill { height: 100%; width: 0; background: var(--accent); border-radius: 999px; transition: width .4s ease; }
.bar-fill.indeterminate { width: 35%; animation: slide 1.4s ease-in-out infinite; }
@keyframes slide { from { transform: translateX(-100%); } to { transform: translateX(290%); } }
.spinner {
  display: inline-block;
  width: 14px;
  height: 14px;
  border: 2px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin .8s linear infinite;
  vertical-align: -2px;
  flex: none;
}
@keyframes spin { to { transform: rotate(360deg); } }
@media (prefers-reduced-motion: reduce) {
  .spinner, .bar-fill.indeterminate { animation-duration: 3s; }
}
.token-form { display: grid; gap: 8px; margin-top: 8px; }
.token-form textarea { width: 100%; font-family: ui-monospace, monospace; font-size: 13px; }
code { font-size: 13px; overflow-wrap: anywhere; }
.notes { white-space: pre-wrap; font-size: 13px; max-height: 240px; overflow: auto; }
a { color: var(--accent); }

.chat-panel { display: flex; flex-direction: column; height: calc(100vh - 140px); min-height: 420px; }
.chat-head { display: flex; justify-content: space-between; align-items: baseline; gap: 8px; }
.chat-log { flex: 1; overflow-y: auto; display: flex; flex-direction: column; gap: 10px; padding: 4px 2px 12px; }
.msg { display: flex; flex-direction: column; max-width: 85%; }
.msg.user { align-self: flex-end; align-items: flex-end; }
.msg.assistant { align-self: flex-start; }
.bubble { padding: 8px 12px; border-radius: 14px; background: var(--bg); border: 1px solid var(--border); line-height: 1.45; }
.msg.user .bubble { background: var(--accent); color: #fff; border-color: var(--accent); }
.msg.pending .bubble { color: var(--muted); font-style: italic; }
.msg .time { font-size: 11px; color: var(--muted); margin: 2px 6px; }
.chips { display: flex; flex-wrap: wrap; gap: 4px; margin-top: 6px; }
.chip { font-size: 12px; padding: 1px 8px; border-radius: 999px; border: 1px solid var(--border); background: var(--panel); color: var(--text); }
.chat-suggestions { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 8px; }
.chat-form { display: flex; gap: 8px; align-items: flex-end; }
.chat-form textarea { flex: 1; resize: none; }

@media (max-width: 700px) {
  .chat-panel { height: calc(100vh - 190px - env(safe-area-inset-bottom)); }
  .tabs button { font-size: 14px; }
  .msg { max-width: 92%; }
}