:root {
  color-scheme: dark;
  --bg: #0e1014;
  --surface: #181b22;
  --surface-2: #222631;
  --border: #2c313d;
  --text: #eef0f4;
  --muted: #98a0b0;
  --accent: #7cd992;
  --accent-ink: #0b1a10;
  --danger: #ff7a7a;
  --radius: 16px;
  --tap: 56px;
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }

html, body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 17px/1.4 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  -webkit-font-smoothing: antialiased;
  -webkit-tap-highlight-color: transparent;
}

body {
  min-height: 100dvh;
  padding: env(safe-area-inset-top) 16px calc(env(safe-area-inset-bottom) + 24px);
}

main { max-width: 560px; margin: 0 auto; }

header.bar {
  display: flex;
  align-items: center;
  gap: 12px;
  min-height: var(--tap);
  padding: 12px 0;
}
header.bar h1 { flex: 1; margin: 0; font-size: 1.5rem; font-weight: 700; }

button, .btn {
  min-height: var(--tap);
  padding: 0 20px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface-2);
  color: var(--text);
  font: inherit;
  font-weight: 600;
  cursor: pointer;
  touch-action: manipulation;
}
button.primary { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); }
button.ghost { background: transparent; }
button:active { transform: scale(0.98); }

.list { display: grid; gap: 12px; padding: 0; margin: 0; list-style: none; }

.card {
  display: block;
  width: 100%;
  padding: 18px 20px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  color: inherit;
  text-align: left;
  text-decoration: none;
}
a.card:active { background: var(--surface-2); }
.card h2 { margin: 0 0 6px; font-size: 1.2rem; }
.card .target { font-size: 1.05rem; font-variant-numeric: tabular-nums; }
.card .meta, .muted { color: var(--muted); font-size: 0.95rem; }
.card .notes { margin-top: 8px; color: var(--muted); font-size: 0.9rem; }

.error { color: var(--danger); min-height: 1.4em; }

/* Login */
.login {
  display: grid;
  gap: 16px;
  max-width: 360px;
  margin: 18vh auto 0;
}
.login h1 { margin: 0 0 8px; font-size: 1.8rem; }
.login input {
  min-height: var(--tap);
  padding: 0 16px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  color: var(--text);
  font: inherit;
  font-size: 1.2rem;
}
.login input:focus { outline: 2px solid var(--accent); outline-offset: 1px; }

.icon-btn { display: grid; place-items: center; width: var(--tap); padding: 0; text-decoration: none; font-size: 1.3rem; }
button.danger { color: var(--danger); }
button:disabled { opacity: 0.4; }
button.card { font: inherit; cursor: pointer; }
button.card:active { background: var(--surface-2); }

.section-label {
  margin: 24px 0 10px;
  color: var(--muted);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

/* ---------- Session ---------- */

.sync { color: var(--muted); font-size: 0.85rem; text-align: right; }
.sync[data-state="offline"] { color: #f2c46d; }
.session-date { margin: -8px 0 14px; }

.ex-list { display: grid; gap: 10px; padding: 0; margin: 0; list-style: none; }

.ex {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
}
.ex.open { border-color: var(--accent); }
.ex-head { display: flex; align-items: stretch; }
.ex-toggle {
  flex: 1;
  display: grid;
  gap: 2px;
  min-height: 68px;
  padding: 12px 16px;
  border: 0;
  background: none;
  text-align: left;
}
.ex-name { font-size: 1.1rem; font-weight: 700; }
.ex-sub { color: var(--muted); font-size: 0.92rem; font-weight: 400; font-variant-numeric: tabular-nums; }
.handle {
  display: grid;
  place-items: center;
  width: 52px;
  color: var(--muted);
  cursor: grab;
  touch-action: none;
  user-select: none;
}
.ex-body { display: grid; gap: 12px; padding: 0 16px 16px; }
.ex-target { font-variant-numeric: tabular-nums; }
.ex-hint { color: var(--muted); font-size: 0.88rem; }
.ex-last { color: var(--accent); font-size: 0.92rem; font-variant-numeric: tabular-nums; }
.save-form { display: grid; grid-template-columns: 1fr auto; gap: 8px; }
.save-form input {
  min-width: 0;
  padding: 0 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg);
  color: var(--text);
  font: inherit;
  font-size: 16px;
}

.sets { display: grid; gap: 10px; }
.set-grid {
  display: grid;
  grid-template-columns: 1.15fr 1fr 52px;
  gap: 8px;
  align-items: center;
}
.set-head { color: var(--muted); font-size: 0.78rem; letter-spacing: 0.06em; text-transform: uppercase; margin-bottom: -4px; }
.set-head span { text-align: center; }
.set { display: grid; gap: 4px; }
.set-label { color: var(--muted); font-size: 0.8rem; font-variant-numeric: tabular-nums; }
.stepper {
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr) 40px;
  height: 52px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--bg);
  overflow: hidden;
}
.stepper:focus-within { outline: 2px solid var(--accent); outline-offset: 0; }
.stepper button {
  min-height: 0;
  height: 100%;
  padding: 0;
  border: 0;
  border-radius: 0;
  background: var(--surface-2);
  color: var(--text);
  font-size: 1.35rem;
  font-weight: 500;
}
.stepper button:active { background: var(--border); transform: none; }
.stepper input {
  width: 100%;
  min-width: 0;
  border: 0;
  background: transparent;
  color: var(--text);
  font: inherit;
  font-size: 1.25rem;
  font-variant-numeric: tabular-nums;
  text-align: center;
  -moz-appearance: textfield;
  appearance: textfield;
}
.stepper input::-webkit-inner-spin-button, .stepper input::-webkit-outer-spin-button { -webkit-appearance: none; margin: 0; }
.stepper input:focus { outline: none; }
.done-btn { min-height: 52px; padding: 0; font-size: 1.3rem; color: var(--muted); }
.done-btn[aria-pressed="true"] { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); }
.set.done input { color: var(--muted); }
.set.done .set-label { color: var(--accent); }

.cues { display: grid; gap: 6px; padding: 12px 14px; border-radius: 12px; background: var(--surface-2); }
.cue-list { display: grid; gap: 4px; margin: 0; padding-left: 1.1em; }
.cue-list li::marker { color: var(--accent); }
.cue-empty { margin: 0; font-size: 0.9rem; }
.link-btn { justify-self: start; min-height: 36px; padding: 0; border: 0; background: none; color: var(--muted); font-size: 0.88rem; font-weight: 500; text-decoration: underline; }
.cue-form { display: grid; gap: 8px; }
.custom-form textarea { width: 100%; padding: 12px 14px; border: 1px solid var(--border); border-radius: 12px; background: var(--bg); color: var(--text); font: inherit; font-size: 16px; }
.set-buttons { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }

.notes, .summary, .search, .custom-form input, .custom-form select {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--bg);
  color: var(--text);
  font: inherit;
  font-size: 16px;
}
.notes { resize: vertical; }
.summary { margin-top: 12px; font-family: ui-monospace, "SF Mono", Menlo, monospace; font-size: 0.9rem; resize: vertical; }
.remove-ex { justify-self: start; min-height: 44px; padding: 0 4px; border: 0; }

.empty-hint { padding: 24px; border: 1px dashed var(--border); border-radius: var(--radius); color: var(--muted); text-align: center; }
.pool-open { width: 100%; margin-top: 12px; border-style: dashed; }
.session-actions { display: grid; gap: 10px; margin-top: 24px; }

/* Exercise pool: side panel on wide screens, bottom sheet on phones. */
.pool {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 16px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
}
.pool-head { display: flex; align-items: center; justify-content: space-between; }
.pool-head h2 { margin: 0; font-size: 1.15rem; }
.pool-tip { margin: 0; font-size: 0.85rem; }
.write-in { border-style: dashed; }
.custom-form { display: grid; gap: 10px; }
.custom-form label { display: grid; gap: 4px; color: var(--muted); font-size: 0.85rem; }
.cf-row { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; }
.pool-groups { display: grid; gap: 6px; }
.pool-group summary {
  padding: 10px 2px;
  color: var(--muted);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  cursor: pointer;
}
.pool-list { display: grid; gap: 6px; padding: 0; margin: 0; list-style: none; min-height: 8px; }
.pool-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 6px 6px 14px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--surface-2);
  cursor: grab;
  user-select: none;
  -webkit-user-select: none;
}
.pool-item.in-use { opacity: 0.55; }
.pi-text { flex: 1; display: grid; min-width: 0; }
.pi-name { font-weight: 600; }
.pi-sub { color: var(--muted); font-size: 0.82rem; }
.add-btn { width: 48px; min-height: 48px; padding: 0; font-size: 1.4rem; }
.sortable-ghost { opacity: 0.4; }
.ex-list .pool-item { padding-block: 18px; }

@media (min-width: 900px) {
  main { max-width: 1040px; }
  .session-layout { display: grid; grid-template-columns: 1fr 360px; gap: 24px; align-items: start; }
  .pool { position: sticky; top: 16px; max-height: calc(100dvh - 32px); overflow-y: auto; }
  .pool-open, #pool-close { display: none; }
}

@media (max-width: 899px) {
  .pool {
    position: fixed;
    inset: auto 0 0 0;
    z-index: 10;
    height: 62dvh;
    padding-bottom: calc(16px + env(safe-area-inset-bottom));
    border-radius: 20px 20px 0 0;
    overflow-y: auto;
    overscroll-behavior: contain;
    box-shadow: 0 -12px 40px rgb(0 0 0 / 0.5);
    transform: translateY(105%);
    transition: transform 0.22s ease;
  }
  .pool-visible .pool { transform: none; }
  .pool-head { position: sticky; top: -16px; margin: -16px -16px 0; padding: 12px 16px; background: var(--surface); z-index: 1; }
  .pool-visible main { padding-bottom: 62dvh; }
}

.share-box { display: grid; gap: 12px; }
.share-box p { margin: 0; }
.share-text { line-height: 1.45; }
.share-url {
  width: 100%;
  min-height: 48px;
  padding: 0 12px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--bg);
  color: var(--text);
  font: 0.9rem ui-monospace, "SF Mono", Menlo, monospace;
}
.share-actions { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.share-actions .primary { grid-column: 1 / -1; }
.share-warn { font-size: 0.85rem; }

.toast {
  position: fixed;
  left: 50%;
  bottom: calc(24px + env(safe-area-inset-bottom));
  z-index: 20;
  padding: 12px 18px;
  border-radius: 999px;
  background: var(--text);
  color: var(--bg);
  font-weight: 600;
  opacity: 0;
  pointer-events: none;
  transform: translate(-50%, 8px);
  transition: opacity 0.2s, transform 0.2s;
}
.toast.show { opacity: 1; transform: translate(-50%, 0); }
.pool-visible .toast { bottom: calc(62dvh + 12px); }

@media (prefers-reduced-motion: reduce) {
  .pool, .toast { transition: none; }
}