:root {
  --bg: #f4f5f7;
  --surface: #ffffff;
  --surface-2: #eceef2;
  --text: #15181e;
  --muted: #5d6573;
  --border: #dde1e7;
  --accent: #2563eb;
  --muscu: #ea580c;
  --jjb: #2563eb;
  --good: #16a34a;
  --warn: #d97706;
  --work: #dc2626;
  --rest: #16a34a;
  --radius: 14px;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1115;
    --surface: #181b21;
    --surface-2: #22262e;
    --text: #eef0f4;
    --muted: #9aa3b2;
    --border: #2b303a;
    --accent: #60a5fa;
    --muscu: #fb923c;
    --jjb: #60a5fa;
    --good: #4ade80;
    --warn: #fbbf24;
    --work: #f87171;
    --rest: #4ade80;
    color-scheme: dark;
  }
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  padding-bottom: calc(76px + env(safe-area-inset-bottom));
}
h1 { font-size: 1.7rem; margin: 8px 0 4px; letter-spacing: -0.02em; }
h2 { font-size: 1.05rem; margin: 0 0 8px; }
h3 { font-size: 1rem; margin: 0; }
ul, ol { margin: 0; padding-left: 1.2em; }
li { margin: 4px 0; }
button { font: inherit; color: inherit; }

.top {
  position: sticky; top: 0; z-index: 5;
  display: flex; justify-content: space-between; align-items: center; gap: 12px;
  padding: 10px 16px;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}
.brand { display: flex; align-items: center; gap: 8px; font-weight: 700; }
.profile { display: flex; gap: 6px; flex-wrap: wrap; justify-content: flex-end; }
.profile span {
  font-size: .75rem; padding: 2px 8px; border-radius: 99px;
  background: var(--surface-2); color: var(--muted);
}

main { max-width: 900px; margin: 0 auto; padding: 8px 16px 24px; }
.lead { color: var(--muted); margin: 0 0 16px; }
.section-title { margin: 24px 0 10px; font-size: 1.2rem; }

.panel {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 14px 16px; margin-bottom: 12px;
}
.panel.good { border-left: 4px solid var(--good); }
.panel.warn { border-left: 4px solid var(--warn); }
.grid2, .grid3 { display: grid; gap: 12px; margin-bottom: 12px; }
.grid2 > .panel, .grid3 > .panel { margin-bottom: 0; }
@media (min-width: 680px) {
  .grid2 { grid-template-columns: 1fr 1fr; }
  .grid3 { grid-template-columns: repeat(3, 1fr); }
}

.chain { counter-reset: step; list-style: none; padding: 0; }
.chain li { position: relative; padding-left: 30px; margin: 8px 0; }
.chain li::before {
  counter-increment: step; content: counter(step);
  position: absolute; left: 0; top: 1px;
  width: 22px; height: 22px; border-radius: 50%;
  display: grid; place-items: center;
  font-size: .75rem; font-weight: 700;
  background: var(--jjb); color: var(--bg);
}

.week { display: grid; grid-template-columns: repeat(7, minmax(0, 1fr)); gap: 6px; margin-bottom: 12px; }
.day {
  background: var(--surface); border: 1px solid var(--border); border-radius: 10px;
  padding: 8px 6px; font-size: .78rem; text-align: center; border-top: 4px solid var(--border);
}
.day b { display: block; font-size: .85rem; margin-bottom: 2px; }
.day.jjb { border-top-color: var(--jjb); }
.day.muscu { border-top-color: var(--muscu); }
@media (max-width: 560px) {
  .week { grid-template-columns: 1fr; }
  .day { display: flex; gap: 10px; text-align: left; border-top-width: 1px; border-left: 4px solid var(--border); }
  .day.jjb { border-left-color: var(--jjb); }
  .day.muscu { border-left-color: var(--muscu); }
  .day b { width: 36px; flex: none; margin: 0; }
}

.session { border-top: 4px solid var(--muscu); }
.session ol { padding-left: 1.3em; }
.session a { color: var(--text); text-decoration: underline; text-decoration-color: var(--muscu); text-underline-offset: 3px; cursor: pointer; }
.session .note { font-size: .85rem; color: var(--muted); margin: 8px 0 0; }

.search {
  width: 100%; padding: 11px 14px; font: inherit;
  border-radius: 12px; border: 1px solid var(--border);
  background: var(--surface); color: var(--text); margin-bottom: 10px;
}
.chips { display: flex; gap: 6px; overflow-x: auto; padding-bottom: 6px; margin-bottom: 6px; scrollbar-width: none; }
.chips::-webkit-scrollbar { display: none; }
.chip {
  flex: none; padding: 6px 12px; border-radius: 99px; cursor: pointer;
  border: 1px solid var(--border); background: var(--surface); font-size: .88rem;
}
.chip[aria-pressed="true"] { background: var(--text); color: var(--bg); border-color: var(--text); }

.list { display: grid; gap: 8px; margin-top: 6px; }
.card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); overflow: hidden;
}
.card summary {
  list-style: none; cursor: pointer; padding: 12px 14px;
  display: flex; align-items: center; gap: 10px;
}
.card summary::-webkit-details-marker { display: none; }
.card summary::after { content: "›"; margin-left: auto; color: var(--muted); font-size: 1.3rem; transition: transform .15s; }
.card[open] summary::after { transform: rotate(90deg); }
.card .meta { font-size: .82rem; color: var(--muted); }
.card .body { padding: 0 14px 14px; border-top: 1px solid var(--border); }
.card .body h4 { margin: 12px 0 4px; font-size: .8rem; text-transform: uppercase; letter-spacing: .06em; color: var(--muted); }
.card.muscu { border-left: 4px solid var(--muscu); }
.card.jjb { border-left: 4px solid var(--jjb); }
.card.done { border-left-color: var(--good); }
.card.flash { animation: flash 1.2s ease; }
@keyframes flash { 0%, 40% { box-shadow: 0 0 0 3px var(--muscu); } 100% { box-shadow: none; } }

.why { margin: 12px 0 0; padding: 10px 12px; border-radius: 10px; background: var(--surface-2); }
.tag {
  font-size: .7rem; font-weight: 600; padding: 2px 7px; border-radius: 6px;
  background: var(--surface-2); color: var(--muted); white-space: nowrap;
}
.dots { letter-spacing: 1px; color: var(--jjb); font-size: .75rem; }
.check {
  flex: none; width: 22px; height: 22px; border-radius: 50%;
  border: 2px solid var(--border); display: grid; place-items: center; font-size: .8rem;
}
.done .check { background: var(--good); border-color: var(--good); color: var(--bg); }

.record { display: flex; flex-direction: column; gap: 4px; margin-top: 12px; font-size: .85rem; color: var(--muted); }
.record input {
  font: inherit; padding: 8px 10px; border-radius: 10px;
  border: 1px solid var(--border); background: var(--bg); color: var(--text);
}
.toggle {
  margin-top: 12px; width: 100%; padding: 10px; border-radius: 10px; cursor: pointer;
  border: 1px solid var(--good); background: transparent; color: var(--good); font-weight: 600;
}
.done .toggle { background: var(--good); color: var(--bg); }

.progress { display: flex; align-items: center; gap: 10px; margin-bottom: 12px; font-size: .88rem; color: var(--muted); }
.progress .bar { flex: 1; height: 8px; border-radius: 99px; background: var(--surface-2); overflow: hidden; }
.progress .bar span { display: block; height: 100%; background: var(--good); width: 0; transition: width .3s; }
.random {
  border: 1px dashed var(--border); background: transparent; border-radius: 12px;
  padding: 9px; width: 100%; cursor: pointer; color: var(--muted);
}
.empty { text-align: center; color: var(--muted); padding: 24px; }

.timer {
  margin: 12px 0; padding: 28px 16px; border-radius: 20px; text-align: center;
  background: var(--surface); border: 1px solid var(--border); transition: background .3s;
}
.timer.work { background: color-mix(in srgb, var(--work) 18%, var(--surface)); border-color: var(--work); }
.timer.rest { background: color-mix(in srgb, var(--rest) 18%, var(--surface)); border-color: var(--rest); }
.timer.prep { background: color-mix(in srgb, var(--warn) 18%, var(--surface)); border-color: var(--warn); }
.timer-phase { font-weight: 700; text-transform: uppercase; letter-spacing: .1em; }
.timer-time { font-size: clamp(4rem, 22vw, 7.5rem); font-weight: 800; font-variant-numeric: tabular-nums; line-height: 1.1; }
.timer-round { color: var(--muted); }
.timer-controls { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.btn {
  padding: 14px; border-radius: 12px; border: 1px solid var(--border);
  background: var(--surface); font-weight: 700; cursor: pointer;
}
.btn.primary { background: var(--text); color: var(--bg); border-color: var(--text); }
.timer-settings { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; margin-top: 12px; }
.timer-settings label { display: flex; flex-direction: column; gap: 4px; font-size: .8rem; color: var(--muted); }
.timer-settings input {
  font: inherit; padding: 8px; border-radius: 10px; width: 100%;
  border: 1px solid var(--border); background: var(--surface); color: var(--text);
}

.tabs {
  position: fixed; left: 0; right: 0; bottom: 0; z-index: 10;
  display: grid; grid-template-columns: repeat(4, 1fr);
  background: var(--surface); border-top: 1px solid var(--border);
  padding-bottom: env(safe-area-inset-bottom);
}
.tabs button {
  border: 0; background: none; padding: 8px 4px 10px; cursor: pointer;
  display: flex; flex-direction: column; align-items: center; gap: 2px;
  font-size: .75rem; color: var(--muted);
}
.tabs button span { font-size: 1.3rem; filter: grayscale(1); opacity: .7; }
.tabs button[aria-current="page"] { color: var(--text); font-weight: 700; }
.tabs button[aria-current="page"] span { filter: none; opacity: 1; }