:root {
  --pico-font-size: 15px;
  /* Cool green accent scale (light-mode defaults) */
  --dc-green-bg:    #ecfdf5;   /* soft surface fill */
  --dc-green-tag:   #d1fae5;   /* tag fill */
  --dc-green-line:  #10b981;   /* accent border / stripe */
  --dc-green-solid: #059669;   /* solid CTA / chip bg */
  --dc-green-hover: #047857;
  --dc-green-text:  #065f46;   /* text on green-tag fill */
  /* Cool complementary slate for category tags so they don't clash */
  --dc-tag-bg:      #e2e8f0;
  --dc-tag-text:    #334155;
}

/* Dark mode (Pico auto-detects prefers-color-scheme) */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --dc-green-bg:    rgba(16, 185, 129, 0.10);
    --dc-green-tag:   rgba(16, 185, 129, 0.20);
    --dc-green-line:  #10b981;
    --dc-green-solid: #10b981;
    --dc-green-hover: #34d399;
    --dc-green-text:  #a7f3d0;
    --dc-tag-bg:      rgba(148, 163, 184, 0.18);
    --dc-tag-text:    #cbd5e1;
  }
}
[data-theme="dark"] {
  --dc-green-bg:    rgba(16, 185, 129, 0.10);
  --dc-green-tag:   rgba(16, 185, 129, 0.20);
  --dc-green-line:  #10b981;
  --dc-green-solid: #10b981;
  --dc-green-hover: #34d399;
  --dc-green-text:  #a7f3d0;
  --dc-tag-bg:      rgba(148, 163, 184, 0.18);
  --dc-tag-text:    #cbd5e1;
}

/* ---------- Nav ---------- */
header nav { padding-block: .5rem; }
header nav .nav-links { display: flex; gap: .25rem; align-items: center; flex-wrap: wrap; }
header nav .nav-links a {
  padding: .35rem .75rem;
  border-radius: var(--pico-border-radius);
  text-decoration: none;
}
header nav .nav-links a.active {
  background: var(--dc-green-solid);
  color: #fff;
}

/* ---------- Page head ---------- */
.page-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
  margin-bottom: 1rem;
}
.page-head h2 { margin: 0; }

.date-nav { display: flex; gap: .5rem; align-items: center; flex-wrap: wrap; }
.date-nav .week-label { font-weight: 600; }

/* ---------- Filter chips ---------- */
.filters {
  display: flex;
  flex-direction: column;
  gap: .5rem;
  margin-bottom: 1.25rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--pico-muted-border-color);
}
.filter-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .35rem;
}
.filter-label {
  font-size: .75rem;
  text-transform: uppercase;
  letter-spacing: .05em;
  color: var(--pico-muted-color);
  min-width: 5.5em;
}
.chip {
  display: inline-block;
  padding: .3rem .85rem;
  border-radius: 999px;
  border: 1px solid var(--pico-muted-border-color);
  background: var(--pico-background-color);
  color: var(--pico-color) !important;
  font-size: .85rem;
  font-weight: 500;
  text-decoration: none !important;
  white-space: nowrap;
  cursor: pointer;
  user-select: none;
  transition: background 100ms ease, border-color 100ms ease, transform 80ms ease;
}
.chip:hover {
  background: var(--pico-muted-border-color);
  border-color: var(--pico-primary-background);
}
.chip:active { transform: scale(0.97); }
.chip.active {
  background: var(--dc-green-solid);
  color: #fff !important;
  border-color: var(--dc-green-solid);
}
.chip.active:hover {
  background: var(--dc-green-hover);
  border-color: var(--dc-green-hover);
}
.filter-summary { font-size: .8rem; margin: 0; }

/* ---------- Day grid ---------- */
.day-grid {
  display: grid;
  grid-template-columns: repeat(7, minmax(0, 1fr));
  gap: .75rem;
}
.day-col {
  display: flex;
  flex-direction: column;
  gap: .5rem;
  padding: .5rem;
  background: var(--pico-card-background-color);
  border-radius: var(--pico-border-radius);
  border: 1px solid var(--pico-muted-border-color);
  min-height: 5rem;
}
.day-col.today {
  border-color: var(--dc-green-line);
  box-shadow: inset 0 3px 0 0 var(--dc-green-line);
}
.day-header {
  display: flex;
  flex-direction: column;
  gap: .15rem;
  padding: .25rem 0 .4rem;
  border-bottom: 1px solid var(--pico-muted-border-color);
  position: sticky;
  top: 0;
  background: var(--pico-card-background-color);
  z-index: 1;
}
.day-header strong { font-size: .95rem; color: var(--pico-h3-color, var(--pico-color)); }
.day-header .badge {
  display: inline-block;
  font-size: .65rem;
  background: var(--dc-green-solid);
  color: #fff;
  padding: 1px 6px;
  border-radius: 999px;
  align-self: flex-start;
  margin-top: 2px;
}
.empty { text-align: center; opacity: .4; margin: 1rem 0; }

/* ---------- Class card (in column) ---------- */
.class-card {
  display: flex;
  flex-direction: column;
  gap: .25rem;
  padding: .55rem .6rem;
  background: var(--pico-background-color);
  border: 1px solid var(--pico-muted-border-color);
  border-radius: var(--pico-border-radius);
  font-size: .85rem;
}
.class-card.booked {
  border-color: var(--dc-green-line);
  background: var(--dc-green-bg);
  box-shadow: inset 3px 0 0 var(--dc-green-line);
}
.class-card.full { opacity: .55; }
.class-time { font-weight: 700; font-size: .9rem; }
.class-title { font-size: .85rem; line-height: 1.25; word-break: break-word; }
.class-meta { display: flex; flex-wrap: wrap; gap: .25rem; align-items: center; margin-top: .15rem; }
.tag {
  display: inline-block;
  font-size: .65rem;
  padding: 1px 6px;
  border-radius: 4px;
  background: var(--pico-muted-border-color);
  white-space: nowrap;
}
.tag.loc {
  background: var(--dc-green-tag);
  color: var(--dc-green-text);
}
.tag.cat {
  background: var(--dc-tag-bg);
  color: var(--dc-tag-text);
}
.spots { font-size: .75rem; }

.class-actions {
  display: flex;
  flex-wrap: wrap;
  gap: .25rem;
  margin-top: .35rem;
}
.window-hint {
  margin-top: .15rem;
  font-size: .7rem;
  font-style: italic;
}
.class-actions > * { font-size: .75rem; padding: .25rem .5rem; }

/* ---------- Mobile: stack days vertically ---------- */
@media (max-width: 900px) {
  .day-grid { grid-template-columns: 1fr; }
  .day-col { min-height: auto; }
  .day-header { position: relative; }
}

/* ---------- Reservation list ---------- */
.reservation-list { display: flex; flex-direction: column; gap: .5rem; }
.reservation-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
}

/* ---------- Automation form ---------- */
.rule-form .row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: .75rem;
}
.rule-form .row .span-2 { grid-column: span 2; }
@media (max-width: 640px) { .rule-form .row .span-2 { grid-column: span 1; } }

.day-time-block {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: .75rem;
  margin-top: .25rem;
}
@media (max-width: 640px) { .day-time-block { grid-template-columns: 1fr; } }
.day-time-block label small { display: block; margin-top: .25rem; font-size: .75rem; }

/* ---------- Common ---------- */
.muted { color: var(--pico-muted-color); margin: 0; }
.muted.small { font-size: .75rem; }
.success { color: var(--dc-green-hover); font-weight: 600; }
.error   { color: var(--pico-color-red-550);  font-weight: 600; }
.warn    { color: var(--pico-color-orange-550); font-weight: 600; }

.error-box {
  background: var(--pico-color-red-100);
  border-left: 4px solid var(--pico-color-red-550);
  color: var(--pico-color-red-800);
}
.warn-box {
  background: var(--pico-color-orange-100);
  border-left: 4px solid var(--pico-color-orange-550);
  color: var(--pico-color-orange-800);
}

button.small, [role=button].small, a.small { padding: .25rem .55rem; font-size: .8rem; }

.login-wrap { max-width: 420px; margin-top: 8vh; }

/* ---------- Stats ---------- */
.stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: .75rem;
  margin-bottom: 1.5rem;
}
.stat-card {
  display: flex;
  flex-direction: column;
  gap: .15rem;
  padding: .9rem;
  text-align: center;
}
.stat-number {
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--dc-green-solid);
}
.bar-chart {
  display: flex;
  align-items: flex-end;
  gap: .5rem;
  height: 180px;
  padding: .5rem 0;
  border-bottom: 1px solid var(--pico-muted-border-color);
}
.bar-col {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-end;
  gap: .15rem;
  min-width: 0;
}
.bar {
  width: 80%;
  min-height: 2px;
  background: var(--dc-green-solid);
  border-radius: 4px 4px 0 0;
  transition: height 200ms ease;
}
.bar-count {
  font-size: .7rem;
  font-weight: 600;
}
.bar-label {
  font-size: .65rem;
  color: var(--pico-muted-color);
  white-space: nowrap;
}

@media (max-width: 640px) {
  header nav { flex-direction: column; align-items: flex-start; }
  header nav .nav-links { width: 100%; }
}