:root {
  --bg: #0f1419;
  --surface: #1a2332;
  --surface-raised: #212d3d;
  --border: #2d3a4d;
  --text: #e6edf3;
  --muted: #8b949e;
  --accent: #58a6ff;
  --accent-hover: #79b8ff;
  --accent-secondary: #a371f7;
  --success: #3fb950;
  --error: #f85149;
  --font-heading: "DM Sans", system-ui, -apple-system, sans-serif;
  --font-body: system-ui, -apple-system, "Segoe UI", sans-serif;
  --radius: 10px;
  --transition: 0.2s ease;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: var(--font-body);
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  line-height: 1.5;
}

/* Login */
#login-screen {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
}

.login-box {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 2rem;
  width: 100%;
  max-width: 360px;
}

.login-box h1 {
  margin: 0 0 0.25rem;
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 600;
}

.login-box .subtitle {
  margin: 0 0 1.5rem;
  color: var(--muted);
  font-size: 0.9rem;
}

.login-box label {
  display: block;
  margin-bottom: 0.35rem;
  font-size: 0.875rem;
  color: var(--muted);
}

.login-box input {
  width: 100%;
  padding: 0.6rem 0.75rem;
  margin-bottom: 1rem;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text);
  font-size: 1rem;
}

.login-box input:focus {
  outline: none;
  border-color: var(--accent);
}

.login-box .error {
  color: var(--error);
  font-size: 0.875rem;
  margin-bottom: 0.5rem;
}

.login-box button {
  width: 100%;
  padding: 0.65rem 1rem;
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: 6px;
  font-size: 1rem;
  font-weight: 500;
  cursor: pointer;
}

.login-box button:hover {
  background: var(--accent-hover);
}

/* App */
#app {
  max-width: 1440px;
  margin: 0 auto;
  padding: 2rem;
}

.header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 2rem;
  flex-wrap: wrap;
  gap: 1rem;
}

.header h1 {
  margin: 0;
  font-family: var(--font-heading);
  font-size: 1.75rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text);
}

.btn {
  padding: 0.55rem 1.1rem;
  background: var(--surface-raised);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  font-size: 0.9rem;
  font-weight: 500;
  cursor: pointer;
  transition: background var(--transition), border-color var(--transition);
}

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

/* KPIs */
.kpis {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 1.25rem;
  margin-bottom: 2rem;
}

.kpis .card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem;
  transition: border-color var(--transition), box-shadow var(--transition);
  box-shadow: 0 1px 0 rgba(0, 0, 0, 0.15);
}

.kpis .card:hover {
  border-color: rgba(88, 166, 255, 0.3);
}

.kpis .value {
  display: block;
  font-family: var(--font-heading);
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: -0.02em;
}

.kpis .label {
  font-size: 0.8rem;
  color: var(--muted);
  margin-top: 0.2rem;
}

/* Section headings */
.chart-wrap h2,
.table-section h2 {
  font-family: var(--font-heading);
  font-weight: 600;
  letter-spacing: -0.01em;
}

/* Filter bar */
.filter-section {
  margin-bottom: 1.5rem;
}

.filter-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  gap: 0.75rem 1.25rem;
  padding: 0.85rem 1rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.filter-bar-label {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--muted);
  margin-right: 0.25rem;
  align-self: center;
}

.filter-group {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}

.filter-group label {
  font-size: 0.7rem;
  color: var(--muted);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.filter-bar input[type="date"],
.filter-bar select {
  padding: 0.4rem 0.5rem;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text);
  font-size: 0.8rem;
  min-width: 0;
}

.filter-bar input:focus,
.filter-bar select:focus {
  outline: none;
  border-color: var(--accent);
}

.filter-bar select {
  min-width: 120px;
  max-width: 180px;
  height: 2rem;
  cursor: pointer;
}

.filter-bar .filter-clear {
  margin-left: auto;
  padding: 0.4rem 0.75rem;
  font-size: 0.8rem;
}

.btn-secondary {
  background: transparent;
  border-color: var(--muted);
  color: var(--muted);
}

.btn-secondary:hover {
  color: var(--text);
  border-color: var(--text);
}

.filter-chips {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  margin-top: 0.75rem;
  padding: 0 0.25rem;
}

.filter-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.25rem 0.5rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 999px;
  font-size: 0.8rem;
  color: var(--text);
}

.filter-chip button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.1rem;
  height: 1.1rem;
  padding: 0;
  background: var(--border);
  border: none;
  border-radius: 50%;
  color: var(--text);
  font-size: 0.9rem;
  line-height: 1;
  cursor: pointer;
}

.filter-chip button:hover {
  background: var(--error);
  color: #fff;
}

/* Charts */
.charts {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 1.5rem;
  margin-bottom: 2rem;
  min-height: 320px;
}

.chart-wrap {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem;
  min-height: 300px;
  width: 100%;
  min-width: 0;
  transition: border-color var(--transition);
}

.chart-wrap:hover {
  border-color: rgba(88, 166, 255, 0.2);
}

.chart-wrap h2 {
  margin: 0 0 1rem;
  font-size: 1rem;
  font-weight: 600;
  color: var(--muted);
}

.chart-container {
  width: 100% !important;
  height: 280px !important;
  min-height: 260px;
  display: block;
}

/* Table */
.table-section {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem;
  overflow: hidden;
}

.table-section h2 {
  margin: 0 0 1rem;
  font-size: 1rem;
  font-weight: 600;
  color: var(--muted);
}

.table-controls {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1rem;
}

.table-controls input {
  flex: 1;
  max-width: 320px;
  padding: 0.55rem 0.85rem;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  font-size: 0.9rem;
  transition: border-color var(--transition);
}

.table-controls input:focus {
  outline: none;
  border-color: var(--accent);
}

.table-wrap {
  overflow-x: auto;
  max-height: 70vh;
  overflow-y: auto;
}

#episodes-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.85rem;
}

#episodes-table thead {
  position: sticky;
  top: 0;
  z-index: 1;
  background: var(--surface-raised);
}

#episodes-table th,
#episodes-table td {
  padding: 0.6rem 0.85rem;
  text-align: left;
  border-bottom: 1px solid var(--border);
}

#episodes-table th {
  color: var(--muted);
  font-weight: 600;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  white-space: nowrap;
}

#episodes-table th[data-sort] {
  cursor: pointer;
  user-select: none;
}

#episodes-table th[data-sort]:hover {
  color: var(--text);
}

#episodes-table tbody tr {
  transition: background var(--transition);
}

#episodes-table tbody tr:nth-child(even) {
  background: rgba(0, 0, 0, 0.12);
}

#episodes-table tbody tr:hover {
  background: rgba(88, 166, 255, 0.08);
}

#episodes-table td.summary {
  max-width: 280px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.pagination {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-top: 1rem;
}

.pagination button {
  transition: background var(--transition);
}

.pagination button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.pagination button:not(:disabled):hover {
  background: var(--border);
}

/* Empty state */
.empty-state {
  text-align: center;
  padding: 2.5rem 2rem;
  margin-bottom: 1.5rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--muted);
}

.empty-state p {
  margin: 0 0 1rem;
  font-size: 1rem;
}

.empty-state .btn {
  margin-top: 0.25rem;
}

.reload-error {
  padding: 0.75rem 1rem;
  margin-bottom: 1rem;
  background: rgba(248, 81, 73, 0.15);
  border: 1px solid var(--error);
  border-radius: var(--radius);
  color: var(--error);
  font-size: 0.9rem;
}