:root {
  --bg: #f6f5fb;
  --card: #ffffff;
  --ink: #1f2430;
  --muted: #6b7280;
  --line: #e6e4ef;
  --accent: #e1685b;
  --accent-ink: #ffffff;
  --easy: #4caf8f;
  --hard: #e15b6e;
  --moderate: #d9a93f;
  --row-bg: #f6f5fb;
  --radius: 14px;
  --shadow: 0 1px 3px rgba(20, 25, 50, 0.08), 0 6px 20px rgba(20, 25, 50, 0.06);
}

:root[data-theme="dark"] {
  --bg: #12141c;
  --card: #1c1f2a;
  --ink: #e7e9f0;
  --muted: #9aa0b0;
  --line: #2c3040;
  --accent: #ec7a6d;
  --accent-ink: #1c1f2a;
  --easy: #5fc7a6;
  --hard: #ec6f81;
  --moderate: #d9a93f;
  --row-bg: #161922;
  --shadow: 0 1px 3px rgba(0, 0, 0, 0.4), 0 6px 20px rgba(0, 0, 0, 0.3);
  color-scheme: dark;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--ink);
  -webkit-font-smoothing: antialiased;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 16px 20px;
  flex-wrap: wrap;
}

.topbar h1 { font-size: 1.3rem; margin: 0; }

.date-controls { display: flex; align-items: center; gap: 6px; }

input[type="date"] {
  background: var(--card);
  color: var(--ink);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 7px 10px;
  font-size: 0.95rem;
}

.icon-btn {
  background: var(--card);
  border: 1px solid var(--line);
  color: var(--ink);
  border-radius: 10px;
  width: 38px;
  height: 38px;
  font-size: 1.1rem;
  cursor: pointer;
}
.icon-btn:hover { border-color: var(--accent); }

.header-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 0 20px 12px;
  flex-wrap: wrap;
}

.primary-btn {
  background: var(--accent);
  color: var(--accent-ink);
  border: none;
  border-radius: 10px;
  padding: 9px 16px;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
}
.primary-btn:disabled { opacity: 0.6; cursor: default; }

.ghost-btn {
  background: var(--card);
  color: var(--ink);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 9px 14px;
  font-size: 0.9rem;
  cursor: pointer;
}
.ghost-btn:hover { border-color: var(--accent); }

.save-status { color: var(--muted); font-size: 0.85rem; }

.layout {
  display: grid;
  grid-template-columns: 1.7fr 1fr;
  gap: 16px;
  padding: 0 20px 28px;
  align-items: start;
}

@media (max-width: 820px) {
  .layout { grid-template-columns: 1fr; }
}

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 20px;
}

.empty { color: var(--muted); padding: 24px 4px; text-align: center; }
.hidden { display: none; }

.plan-head { display: flex; align-items: center; gap: 10px; margin-bottom: 6px; }

.pill {
  background: var(--accent);
  color: var(--accent-ink);
  border-radius: 999px;
  padding: 4px 12px;
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: capitalize;
}

.effort { font-size: 0.85rem; color: var(--muted); text-transform: capitalize; }
.effort[data-effort="easy"] { color: var(--easy); }
.effort[data-effort="moderate"] { color: var(--moderate); }
.effort[data-effort="hard"] { color: var(--hard); }

.phase-tag {
  font-size: 0.78rem;
  color: var(--muted);
  text-transform: capitalize;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 2px 10px;
}

.pill.small { font-size: 0.7rem; padding: 2px 8px; margin-right: 6px; }

.plan h2 { margin: 4px 0 14px; font-size: 1.5rem; }
.plan h3 { margin: 18px 0 6px; font-size: 0.85rem; text-transform: uppercase; letter-spacing: 0.04em; color: var(--muted); }

.body-text { margin: 0; line-height: 1.55; white-space: pre-wrap; }

.metrics-row {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 8px;
  padding: 0;
  margin: 8px 0 0;
}
.metrics-row li {
  background: var(--row-bg);
  border-radius: 10px;
  padding: 10px;
  text-align: center;
}
.metrics-row span { display: block; font-size: 0.72rem; color: var(--muted); margin-bottom: 3px; }
.metrics-row b { font-size: 0.95rem; }

@media (max-width: 520px) {
  .metrics-row { grid-template-columns: repeat(2, 1fr); }
}

.model-tag { margin-top: 16px; color: var(--muted); font-size: 0.72rem; }

.sidebar h2 { margin: 0 0 12px; font-size: 1.05rem; }
.sidebar h3 { margin: 18px 0 8px; font-size: 0.85rem; text-transform: uppercase; letter-spacing: 0.04em; color: var(--muted); }

.stats { list-style: none; padding: 0; margin: 0; }
.stats li {
  display: flex;
  justify-content: space-between;
  padding: 9px 0;
  border-bottom: 1px solid var(--line);
}
.stats li:last-child { border-bottom: none; }
.stats span { color: var(--muted); font-size: 0.9rem; }
.stats b { font-size: 0.95rem; }

.runs { list-style: none; padding: 0; margin: 0; }
.runs li {
  background: var(--row-bg);
  border-radius: 10px;
  padding: 8px 10px;
  margin-bottom: 6px;
  font-size: 0.85rem;
  display: flex;
  justify-content: space-between;
  gap: 8px;
}
.runs .run-date { color: var(--muted); }

/* Tabs */
.tabs {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 0 20px;
  border-bottom: 1px solid var(--line);
  margin-bottom: 16px;
  flex-wrap: wrap;
}
.tab {
  background: none;
  border: none;
  border-bottom: 2px solid transparent;
  color: var(--muted);
  font-size: 0.95rem;
  padding: 10px 14px;
  cursor: pointer;
}
.tab:hover { color: var(--ink); }
.tab.active { color: var(--accent); border-bottom-color: var(--accent); font-weight: 600; }
.tabs .save-status { margin-left: auto; }

.tabpanel { display: none; }
.tabpanel.active { display: block; }

/* Forms */
.form-card { margin: 0 20px 20px; }
.form-card h2 { margin: 0 0 14px; font-size: 1.15rem; }
.form-card h3 { margin: 20px 0 6px; font-size: 0.85rem; text-transform: uppercase; letter-spacing: 0.04em; color: var(--muted); }
.hint { color: var(--muted); font-size: 0.85rem; margin: 0 0 12px; }
.unit-hint { font-size: 0.75rem; color: var(--muted); text-transform: none; }

.field { display: block; font-size: 0.85rem; color: var(--muted); margin-bottom: 14px; }
.field input, .field select, .field textarea, .prompt-text {
  width: 100%;
  margin-top: 4px;
  background: var(--row-bg);
  color: var(--ink);
  border: 1px solid var(--line);
  border-radius: 9px;
  padding: 9px 10px;
  font-size: 0.95rem;
  font-family: inherit;
}
.grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.form-actions { display: flex; justify-content: flex-end; gap: 10px; margin-top: 10px; }

/* Weekly days table */
.days-table { display: flex; flex-direction: column; gap: 4px; margin-bottom: 4px; }
.days-head, .days-row {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  align-items: center;
}
.days-head {
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--muted);
  padding: 0 0 4px;
}
.days-head span { text-align: center; }
.days-head span:first-child { text-align: left; }
.days-row {
  background: var(--row-bg);
  border-radius: 10px;
  padding: 8px 10px;
}
.day-name { font-size: 0.9rem; font-weight: 600; }
.chk { display: flex; justify-content: center; }
.chk input { width: 18px; height: 18px; accent-color: var(--accent); cursor: pointer; }

/* Races */
.races-list { display: flex; flex-direction: column; gap: 6px; margin-bottom: 6px; }
.race-head, .race-row {
  display: grid;
  grid-template-columns: 1.4fr 1.1fr 1fr 0.6fr 1.4fr 36px;
  gap: 8px;
  align-items: center;
}
.race-head {
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--muted);
  padding: 0 2px 2px;
}
.race-row input, .race-row select {
  background: var(--row-bg);
  color: var(--ink);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 7px 8px;
  font-size: 0.88rem;
  font-family: inherit;
  min-width: 0;
}
.race-row .r-del { width: 34px; height: 34px; font-size: 0.9rem; }

@media (max-width: 720px) {
  .race-head { display: none; }
  .race-row { grid-template-columns: 1fr 1fr; }
  .race-row .r-del { grid-column: 2; justify-self: end; }
}

/* Prompt */
.prompt-text { resize: vertical; line-height: 1.5; min-height: 280px; }

/* Program overview */
.program, .schedule {
  margin: 0 20px 16px;
}
.program-head { display: flex; align-items: baseline; gap: 12px; justify-content: space-between; }
.program h2, .schedule h2 { margin: 0 0 10px; font-size: 1.1rem; }

.phase-strip {
  display: flex;
  gap: 10px;
  margin-top: 14px;
  overflow-x: auto;
  padding-bottom: 4px;
}
.phase {
  flex: 1 0 150px;
  background: var(--row-bg);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 12px;
}
.phase.active { border-color: var(--accent); box-shadow: 0 0 0 1px var(--accent); }
.phase-name { font-weight: 700; text-transform: capitalize; }
.phase-dates { font-size: 0.75rem; color: var(--muted); margin: 4px 0; }
.phase-focus { font-size: 0.82rem; line-height: 1.4; }
.phase-km { font-size: 0.78rem; color: var(--muted); margin-top: 6px; }

/* Two-week schedule */
.schedule-list { display: flex; flex-direction: column; gap: 6px; }
.sched-row {
  display: flex;
  gap: 12px;
  align-items: center;
  background: var(--row-bg);
  border-radius: 10px;
  padding: 10px 12px;
  border-left: 3px solid var(--line);
}
.sched-row[data-effort="easy"] { border-left-color: var(--easy); }
.sched-row[data-effort="moderate"] { border-left-color: var(--moderate); }
.sched-row[data-effort="hard"] { border-left-color: var(--hard); }
.sched-day {
  display: flex;
  flex-direction: column;
  align-items: center;
  min-width: 46px;
}
.sched-day b { font-size: 0.9rem; }
.sched-day span { font-size: 0.72rem; color: var(--muted); }
.sched-body { flex: 1; }
.sched-title { font-size: 0.92rem; display: flex; align-items: center; }
.sched-detail { font-size: 0.78rem; color: var(--muted); margin-top: 2px; }