/* ── Theme tokens ─────────────────────────────────────────── */
:root {
  --bg:           #0f0f0f;
  --surface:      #1a1a1a;
  --border:       #2a2a2a;
  --text-primary: #f0f0f0;
  --text-muted:   #888888;
  --accent:       #4f8ef7;
  --radius:       12px;
  --transition:   color 0.2s, background-color 0.2s, border-color 0.2s;
}

[data-theme="light"] {
  --bg:           #f4f4f5;
  --surface:      #ffffff;
  --border:       #e4e4e7;
  --text-primary: #111111;
  --text-muted:   #71717a;
  --accent:       #2563eb;
}

/* ── Reset ────────────────────────────────────────────────── */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

/* ── Base ─────────────────────────────────────────────────── */
body {
  background-color: var(--bg);
  color: var(--text-primary);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, sans-serif;
  font-size: 16px;
  line-height: 1.5;
  min-height: 100dvh;
  /* respect iOS notch / home indicator */
  padding-top:    env(safe-area-inset-top,    0px);
  padding-right:  env(safe-area-inset-right,  0px);
  padding-bottom: env(safe-area-inset-bottom, 0px);
  padding-left:   env(safe-area-inset-left,   0px);
  transition: var(--transition);
}

/* ── Header ───────────────────────────────────────────────── */
header {
  padding: 1.5rem 1.25rem 1rem;
}

.header-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.25rem;
}

h1 {
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.version {
  font-size: 0.75rem;
  opacity: 0.6;
}

/* ── Theme toggle ─────────────────────────────────────────── */
#theme-toggle {
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.35rem 0.6rem;
  font-size: 1rem;
  color: var(--text-primary);
  cursor: pointer;
  transition: var(--transition);
  line-height: 1;
}

#theme-toggle:hover {
  border-color: var(--accent);
}

/* ── Date display ─────────────────────────────────────────── */
.date-display {
  padding-top: 0.25rem;
}

#day-of-week {
  font-size: 2.5rem;
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.02em;
}

#current-date {
  font-size: 1rem;
  color: var(--text-muted);
  margin-top: 0.25rem;
}

/* ── Main content ─────────────────────────────────────────── */
main {
  padding: 0.75rem 1.25rem 2rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

/* ── Card ─────────────────────────────────────────────────── */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem;
  transition: var(--transition);
}

.placeholder-card {
  color: var(--text-muted);
  font-size: 0.95rem;
}

/* ── Card label ───────────────────────────────────────────────── */
.card-label {
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 0.75rem;
}

/* ── Loading / error states ───────────────────────────────────── */
.state-loading {
  color: var(--text-muted);
  font-size: 0.9rem;
}

.state-error {
  color: #f87171;
  font-size: 0.9rem;
}

/* ── Session header ───────────────────────────────────────────── */
.session-title {
  font-size: 1.4rem;
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.01em;
  margin-bottom: 0.5rem;
}

.session-week {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 0.75rem;
}

/* ── Badges ───────────────────────────────────────────────────── */
.badge-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-bottom: 1rem;
}

.badge {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 500;
  padding: 0.2rem 0.55rem;
  border-radius: 6px;
  border: 1px solid var(--border);
  color: var(--text-muted);
  white-space: nowrap;
}

.badge-rest {
  border-color: #854d0e;
  color: #fbbf24;
}

.badge-meta {
  border-color: transparent;
  color: var(--accent);
  padding-left: 0;
}

/* ── Exercise list ────────────────────────────────────────────── */
.exercise-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
  margin-bottom: 1rem;
}

.exercise-item {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
}

.ex-name {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
}

.ex-sets {
  font-size: 0.875rem;
  color: var(--text-muted);
}

.ex-weight {
  font-size: 0.8rem;
  color: var(--accent);
  font-variant-numeric: tabular-nums;
}

.ex-notes {
  font-size: 0.8rem;
  color: var(--text-muted);
  font-style: italic;
}

/* ── Backup note ──────────────────────────────────────────────── */
.backup-note {
  font-size: 0.8rem;
  color: var(--text-muted);
  border-top: 1px solid var(--border);
  padding-top: 0.75rem;
  margin-top: 0.25rem;
  line-height: 1.5;
}

.backup-label {
  font-weight: 600;
  text-transform: uppercase;
  font-size: 0.7rem;
  letter-spacing: 0.06em;
  margin-right: 0.35rem;
}

/* ── Lead-in guidance ─────────────────────────────────────────── */
.guidance-text {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.6;
  margin-top: 0.5rem;
}