/* ===== SAPERO DESIGN TOKENS ===== */
:root, [data-theme="light"] {
  --font-body: 'DM Sans', 'Helvetica Neue', sans-serif;

  --text-xs:   clamp(0.75rem,  0.7rem  + 0.25vw, 0.875rem);
  --text-sm:   clamp(0.875rem, 0.8rem  + 0.35vw, 1rem);
  --text-base: clamp(1rem,     0.95rem + 0.25vw, 1.125rem);
  --text-lg:   clamp(1.125rem, 1rem    + 0.75vw, 1.5rem);
  --text-xl:   clamp(1.5rem,   1.2rem  + 1.25vw, 2.25rem);

  --space-1:  0.25rem;
  --space-2:  0.5rem;
  --space-3:  0.75rem;
  --space-4:  1rem;
  --space-5:  1.25rem;
  --space-6:  1.5rem;
  --space-8:  2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;

  /* Sapero palette — warm, calm, trust-building */
  --color-bg:             #f7f6f2;
  --color-surface:        #ffffff;
  --color-surface-2:      #fbfbf9;
  --color-surface-offset: #f0eeea;
  --color-divider:        #e2dfdb;
  --color-border:         #d4d1ca;

  --color-text:           #28251d;
  --color-text-muted:     #7a7974;
  --color-text-faint:     #bab9b4;
  --color-text-inverse:   #f9f8f4;

  --color-primary:        #2b6e6e;
  --color-primary-hover:  #1e5454;
  --color-primary-active: #15403f;
  --color-primary-light:  #e6f0ef;

  --color-success:        #437a22;
  --color-success-light:  #eef5e8;
  --color-warning:        #c47b1a;
  --color-warning-light:  #fef4e6;
  --color-error:          #b33a3a;
  --color-error-light:    #fceaea;

  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;

  --transition-interactive: 180ms cubic-bezier(0.16, 1, 0.3, 1);

  --shadow-sm: 0 1px 3px rgba(40, 37, 29, 0.06);
  --shadow-md: 0 4px 12px rgba(40, 37, 29, 0.08);
  --shadow-lg: 0 12px 32px rgba(40, 37, 29, 0.12);

  --sidebar-width: 240px;
  --header-height: 60px;
}

[data-theme="dark"] {
  --color-bg:             #141311;
  --color-surface:        #1c1b18;
  --color-surface-2:      #22211e;
  --color-surface-offset: #1a1917;
  --color-divider:        #2d2c29;
  --color-border:         #3a3936;

  --color-text:           #d1d0cd;
  --color-text-muted:     #8a8985;
  --color-text-faint:     #5a5957;
  --color-text-inverse:   #1c1b18;

  --color-primary:        #5aadad;
  --color-primary-hover:  #3d9494;
  --color-primary-active: #2b7a7a;
  --color-primary-light:  #1e2e2e;

  --color-success:        #6daa45;
  --color-success-light:  #1e2a18;
  --color-warning:        #e8a840;
  --color-warning-light:  #2e2518;
  --color-error:          #d45d5d;
  --color-error-light:    #2e1c1c;

  --shadow-sm: 0 1px 3px rgba(0,0,0,0.2);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.3);
  --shadow-lg: 0 12px 32px rgba(0,0,0,0.4);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) {
    --color-bg:             #141311;
    --color-surface:        #1c1b18;
    --color-surface-2:      #22211e;
    --color-surface-offset: #1a1917;
    --color-divider:        #2d2c29;
    --color-border:         #3a3936;
    --color-text:           #d1d0cd;
    --color-text-muted:     #8a8985;
    --color-text-faint:     #5a5957;
    --color-text-inverse:   #1c1b18;
    --color-primary:        #5aadad;
    --color-primary-hover:  #3d9494;
    --color-primary-active: #2b7a7a;
    --color-primary-light:  #1e2e2e;
    --color-success:        #6daa45;
    --color-success-light:  #1e2a18;
    --color-warning:        #e8a840;
    --color-warning-light:  #2e2518;
    --color-error:          #d45d5d;
    --color-error-light:    #2e1c1c;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.2);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.3);
    --shadow-lg: 0 12px 32px rgba(0,0,0,0.4);
  }
}

/* ===== SHARED COMPONENT STYLES ===== */

/* KPI Cards */
.kpi-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(170px, 1fr));
  gap: var(--space-4);
}

.kpi-card {
  background: var(--color-surface);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.kpi-label {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.kpi-value {
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--color-text);
  font-variant-numeric: tabular-nums lining-nums;
  line-height: 1.2;
}

.kpi-delta {
  font-size: var(--text-xs);
  font-weight: 500;
}

.kpi-delta.positive { color: var(--color-success); }
.kpi-delta.negative { color: var(--color-error); }
.kpi-delta.neutral  { color: var(--color-text-muted); }

/* Charts */
.charts-row {
  display: grid;
  grid-template-columns: 1.5fr 1fr;
  gap: var(--space-4);
}

.chart-card {
  background: var(--color-surface);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
}

.chart-card-full {
  grid-column: 1 / -1;
}

.chart-title {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-4);
}

.chart-container {
  position: relative;
  height: 240px;
}

/* Tables */
.table-card {
  background: var(--color-surface);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
}

.table-header-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-4);
  flex-wrap: wrap;
  gap: var(--space-3);
}

.table-wrap {
  overflow-x: auto;
}

table {
  font-variant-numeric: tabular-nums lining-nums;
}

thead {
  position: sticky;
  top: 0;
  z-index: 1;
}

th {
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  padding: var(--space-2) var(--space-3);
  text-align: left;
  border-bottom: 2px solid var(--color-divider);
  background: var(--color-surface);
  white-space: nowrap;
}

td {
  font-size: var(--text-sm);
  padding: var(--space-3);
  border-bottom: 1px solid var(--color-divider);
  color: var(--color-text);
}

tr:last-child td {
  border-bottom: none;
}

tr:hover td {
  background: var(--color-surface-offset);
}

/* Status badges */
.status {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: 2px var(--space-2);
  border-radius: var(--radius-sm);
  font-size: var(--text-xs);
  font-weight: 600;
}

.status-active { background: var(--color-success-light); color: var(--color-success); }
.status-confirmed { background: var(--color-primary-light); color: var(--color-primary); }
.status-pending { background: var(--color-warning-light); color: var(--color-warning); }
.status-graduating { background: var(--color-surface-offset); color: var(--color-text-muted); }
.status-published { background: var(--color-success-light); color: var(--color-success); }
.status-draft { background: var(--color-warning-light); color: var(--color-warning); }
.status-planned { background: var(--color-primary-light); color: var(--color-primary); }
.status-open { background: var(--color-warning-light); color: var(--color-warning); }
.status-completed { background: var(--color-success-light); color: var(--color-success); }
.status-paid { background: var(--color-success-light); color: var(--color-success); }
.status-overdue { background: var(--color-error-light); color: var(--color-error); }

/* Badge */
.badge {
  font-size: var(--text-xs);
  padding: var(--space-1) var(--space-2);
  background: var(--color-surface-offset);
  color: var(--color-text-muted);
  border-radius: var(--radius-sm);
  font-weight: 500;
}

/* Filters */
.filter-group {
  display: flex;
  gap: var(--space-1);
}

.filter-btn {
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-sm);
  font-size: var(--text-xs);
  font-weight: 500;
  color: var(--color-text-muted);
  background: transparent;
  cursor: pointer;
  border: none;
}

.filter-btn:hover {
  background: var(--color-surface-offset);
  color: var(--color-text);
}

.filter-btn.active {
  background: var(--color-primary);
  color: var(--color-text-inverse);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-5);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: all var(--transition-interactive);
}

.btn-primary {
  background: var(--color-primary);
  color: var(--color-text-inverse);
}

.btn-primary:hover {
  background: var(--color-primary-hover);
}

.btn-sm {
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-sm);
  font-size: var(--text-xs);
  font-weight: 600;
  background: var(--color-primary);
  color: var(--color-text-inverse);
  cursor: pointer;
  border: none;
}

.btn-sm:hover {
  background: var(--color-primary-hover);
}

.btn-outline {
  background: transparent;
  color: var(--color-primary);
  border: 1px solid var(--color-primary);
}

.btn-outline:hover {
  background: var(--color-primary-light);
}

/* Footer */
.pplx-footer {
  padding-top: var(--space-6);
  padding-bottom: var(--space-4);
  text-align: center;
}

.pplx-footer a {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  text-decoration: none;
}

.pplx-footer a:hover {
  color: var(--color-text-muted);
}

/* Views */
.view { display: none; flex-direction: column; gap: var(--space-6); }
.view.active { display: flex; }

/* Capacity badge */
.capacity-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-1) var(--space-3);
  background: var(--color-primary-light);
  color: var(--color-primary);
  border-radius: var(--radius-lg);
  font-size: var(--text-xs);
  font-weight: 600;
}

/* Responsive */
@media (max-width: 768px) {
  .charts-row {
    grid-template-columns: 1fr;
  }
  .kpi-row {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 480px) {
  .kpi-row {
    grid-template-columns: 1fr;
  }
}