:root {
  --bg: #14161a;
  --surface: #1e2128;
  --surface-2: #262a33;
  --border: #383e4a;
  --text: #eef0f4;
  --text-dim: #9aa1b1;
  --accent: #ff7a3d;
  --accent-dim: #d9622c;
  --good: #3ddc84;
  --bad: #ff5d5d;
  --radius: 14px;
}

* {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  padding: 0;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  font-size: 17px;
  line-height: 1.4;
  min-height: 100vh;
  padding-bottom: 32px;
}

a { color: var(--accent); }

h1, h2, h3 {
  margin: 0 0 12px;
  font-weight: 700;
}

header.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 16px 8px;
  gap: 12px;
}

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

nav.tabs {
  display: flex;
  gap: 6px;
  padding: 0 16px 12px;
  overflow-x: auto;
}

nav.tabs a {
  flex: none;
  text-decoration: none;
  color: var(--text-dim);
  background: var(--surface);
  border: 1px solid var(--border);
  padding: 8px 14px;
  border-radius: 999px;
  font-size: 0.9rem;
  white-space: nowrap;
}

nav.tabs a.active {
  color: var(--bg);
  background: var(--accent);
  border-color: var(--accent);
  font-weight: 600;
}

main {
  padding: 8px 16px 24px;
  max-width: 640px;
  margin: 0 auto;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
  margin-bottom: 14px;
}

.card h3 {
  font-size: 1.05rem;
}

.muted {
  color: var(--text-dim);
  font-size: 0.9rem;
}

button, .btn {
  font: inherit;
  border: none;
  border-radius: 10px;
  padding: 12px 16px;
  background: var(--accent);
  color: #1a1a1a;
  font-weight: 700;
  cursor: pointer;
  min-height: 44px;
  touch-action: manipulation;
}

button:active { background: var(--accent-dim); }

button.secondary {
  background: var(--surface-2);
  color: var(--text);
  border: 1px solid var(--border);
}

button.danger {
  background: var(--bad);
  color: #fff;
}

button.ghost {
  background: transparent;
  color: var(--accent);
  padding: 6px 10px;
  min-height: auto;
}

button:disabled {
  opacity: 0.5;
  cursor: default;
}

button.small {
  padding: 8px 12px;
  min-height: 36px;
  font-size: 0.85rem;
}

input, select, textarea {
  font: inherit;
  background: var(--surface-2);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 10px 12px;
  border-radius: 10px;
  width: 100%;
}

label {
  display: block;
  font-size: 0.85rem;
  color: var(--text-dim);
  margin: 10px 0 4px;
}

.row {
  display: flex;
  gap: 10px;
}

.row > * {
  flex: 1;
  min-width: 0;
}

.error-msg {
  background: rgba(255, 93, 93, 0.15);
  border: 1px solid var(--bad);
  color: #ffb3b3;
  padding: 10px 12px;
  border-radius: 10px;
  margin: 10px 0;
  font-size: 0.9rem;
}

.login-wrap {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.login-card {
  width: 100%;
  max-width: 360px;
}

.exercise-row {
  display: flex;
  flex-direction: column;
  align-items: stretch;
  gap: 8px;
  padding: 10px 0;
  border-bottom: 1px solid var(--border);
}

.exercise-row:last-child { border-bottom: none; }

.exercise-row .info { min-width: 0; }
.exercise-row .info .name { font-weight: 600; }
.exercise-row .drag-handle {
  color: var(--text-dim);
  font-size: 1.3rem;
  padding: 4px 8px;
  cursor: grab;
  user-select: none;
}

.exercise-row > div:last-child {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
}

.set-log {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 0;
}

.set-log .badge {
  background: var(--surface-2);
  border-radius: 999px;
  padding: 4px 10px;
  font-size: 0.8rem;
  color: var(--text-dim);
  min-width: 60px;
  text-align: center;
}

.set-log.done .badge {
  background: rgba(61, 220, 132, 0.15);
  color: var(--good);
}

#rest-timer {
  position: fixed;
  left: 0; right: 0; bottom: 0;
  background: var(--surface);
  border-top: 2px solid var(--accent);
  padding: 16px;
  display: none;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  z-index: 50;
}

#rest-timer.active { display: flex; }

#rest-timer.flash {
  background: var(--accent);
}

#rest-timer .seconds {
  font-size: 2.2rem;
  font-weight: 800;
  font-variant-numeric: tabular-nums;
}

.tag {
  display: inline-block;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 2px 9px;
  font-size: 0.75rem;
  color: var(--text-dim);
}

.empty-state {
  text-align: center;
  color: var(--text-dim);
  padding: 32px 16px;
}

.checkbox-row {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 0;
}

.checkbox-row input { width: auto; }