/* ==========================================================================
   PubMed Gender Gap Dashboard - CSS
   ========================================================================== */

:root {
  --bg: #0f172a;
  --sidebar-bg: #0b1120;
  --card-bg: #1e293b;
  --card-border: #334155;
  --text: #e2e8f0;
  --text-muted: #94a3b8;
  --accent: #38bdf8;
  --accent-2: #818cf8;
  --ok: #22c55e;
  --warn: #f59e0b;
  --bad: #ef4444;
  --female: #ec4899;
  --male: #3b82f6;
  --sidebar-w: 260px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: 'Segoe UI', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--bg);
  color: var(--text);
  display: flex;
  min-height: 100vh;
}

/* --- Sidebar --- */
.sidebar {
  position: fixed;
  top: 0; left: 0; bottom: 0;
  width: var(--sidebar-w);
  background: var(--sidebar-bg);
  border-right: 1px solid var(--card-border);
  display: flex;
  flex-direction: column;
  z-index: 100;
  overflow-y: auto;
}

.sidebar-header {
  padding: 24px 20px 16px;
  border-bottom: 1px solid var(--card-border);
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
}

.logo {
  font-size: 18px;
  font-weight: 800;
  line-height: 1.2;
  color: var(--accent);
}

.lang-switch {
  display: flex;
  gap: 4px;
}

.lang-switch a {
  display: block;
  padding: 4px 10px;
  border-radius: 6px;
  font-size: 12px;
  font-weight: 700;
  color: var(--text-muted);
  text-decoration: none;
  border: 1px solid var(--card-border);
}

.lang-switch a.active {
  color: var(--accent);
  border-color: var(--accent);
  background: rgba(56,189,248,0.1);
}

.nav-list {
  list-style: none;
  padding: 12px 0;
  flex: 1;
}

.nav-list li a {
  display: block;
  padding: 10px 20px;
  color: var(--text-muted);
  text-decoration: none;
  font-size: 14px;
  font-weight: 500;
  border-left: 3px solid transparent;
  transition: all 0.15s;
}

.nav-list li a:hover {
  color: var(--text);
  background: rgba(255,255,255,0.03);
}

.nav-list li.active a {
  color: var(--accent);
  border-left-color: var(--accent);
  background: rgba(56,189,248,0.08);
}

.sidebar-footer {
  padding: 16px 20px;
  border-top: 1px solid var(--card-border);
  color: var(--text-muted);
  font-size: 11px;
  line-height: 1.5;
}

/* --- Main Content --- */
.content {
  margin-left: var(--sidebar-w);
  flex: 1;
  padding: 32px 40px 60px;
  max-width: 1400px;
}

.page-title {
  font-size: 28px;
  font-weight: 800;
  margin-bottom: 8px;
}

.page-desc {
  color: var(--text-muted);
  font-size: 15px;
  line-height: 1.7;
  margin-bottom: 28px;
  max-width: 900px;
}

/* --- Cards --- */
.card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 16px;
  padding: 24px;
  margin-bottom: 24px;
}

.card-title {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 16px;
  color: var(--text);
}

.card-subtitle {
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 12px;
}

/* --- Grid --- */
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.grid-3 { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 24px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }

/* --- Stat cards --- */
.stat-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 14px;
  padding: 20px;
}

.stat-label {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  margin-bottom: 6px;
}

.stat-value {
  font-size: 32px;
  font-weight: 800;
}

.stat-value.accent { color: var(--accent); }
.stat-value.female { color: var(--female); }
.stat-value.male   { color: var(--male); }
.stat-value.ok     { color: var(--ok); }
.stat-value.warn   { color: var(--warn); }

.stat-detail {
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 4px;
}

/* --- Chart container --- */
.chart-wrap {
  position: relative;
  width: 100%;
  min-height: 350px;
}

.chart-wrap canvas {
  width: 100% !important;
  max-height: 500px;
}

.chart-wrap-tall canvas {
  max-height: 700px;
}

/* --- Tables --- */
.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}

.data-table th {
  text-align: left;
  padding: 10px 12px;
  border-bottom: 2px solid var(--card-border);
  color: var(--text-muted);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  white-space: nowrap;
}

.data-table td {
  padding: 8px 12px;
  border-bottom: 1px solid rgba(51,65,85,0.5);
}

.data-table tr:hover {
  background: rgba(56,189,248,0.03);
}

.data-table .num {
  text-align: right;
  font-family: 'Consolas', 'SF Mono', monospace;
}

/* --- Controls --- */
.controls {
  display: flex;
  gap: 12px;
  align-items: center;
  margin-bottom: 20px;
  flex-wrap: wrap;
}

.controls label {
  font-size: 13px;
  color: var(--text-muted);
}

.controls select,
.controls input {
  padding: 8px 12px;
  border-radius: 8px;
  border: 1px solid var(--card-border);
  background: var(--sidebar-bg);
  color: var(--text);
  font-size: 13px;
  outline: none;
}

.controls select:focus,
.controls input:focus {
  border-color: var(--accent);
}

/* --- Alert --- */
.alert {
  padding: 16px 20px;
  border-radius: 12px;
  margin-bottom: 24px;
  font-size: 14px;
}

.alert-warning {
  background: rgba(245,158,11,0.12);
  border: 1px solid rgba(245,158,11,0.3);
  color: var(--warn);
}

.alert-warning .step-done { color: var(--ok); }
.alert-warning .step-pending { color: var(--text-muted); }

/* --- Footer --- */
.main-footer {
  margin-top: 48px;
  padding-top: 20px;
  border-top: 1px solid var(--card-border);
  color: var(--text-muted);
  font-size: 12px;
  line-height: 1.6;
}

/* --- Bar indicators --- */
.bar-indicator {
  height: 8px;
  border-radius: 99px;
  overflow: hidden;
  background: rgba(255,255,255,0.06);
  margin-top: 8px;
}

.bar-indicator .fill-female {
  height: 100%;
  background: var(--female);
  border-radius: 99px;
  transition: width 0.4s;
}

.bar-indicator .fill-male {
  height: 100%;
  background: var(--male);
  border-radius: 99px;
  transition: width 0.4s;
}

/* --- Confusion matrix --- */
.confusion-grid {
  display: grid;
  grid-template-columns: auto 1fr 1fr;
  gap: 2px;
  max-width: 400px;
}

.confusion-cell {
  padding: 12px;
  text-align: center;
  font-size: 14px;
  font-weight: 600;
  border-radius: 8px;
}

.confusion-header {
  font-size: 12px;
  color: var(--text-muted);
  text-transform: uppercase;
  padding: 8px;
  text-align: center;
}

/* --- Methodology panel (collapsible) --- */
.methodology {
  margin-top: 16px;
  border-top: 1px solid var(--card-border);
  padding-top: 4px;
}

.methodology summary {
  cursor: pointer;
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  padding: 8px 0;
  list-style: none;
  display: flex;
  align-items: center;
  gap: 6px;
  user-select: none;
  transition: color 0.15s;
}

.methodology summary:hover {
  color: var(--accent);
}

.methodology summary::before {
  content: '\25B6';
  font-size: 9px;
  transition: transform 0.2s;
  display: inline-block;
}

.methodology[open] summary::before {
  transform: rotate(90deg);
}

.methodology .method-body {
  padding: 12px 0 4px;
  animation: fadeSlide 0.2s ease;
}

@keyframes fadeSlide {
  from { opacity: 0; transform: translateY(-4px); }
  to   { opacity: 1; transform: translateY(0); }
}

.methodology .method-text {
  font-size: 13px;
  line-height: 1.7;
  color: var(--text-muted);
  margin-bottom: 12px;
  max-width: 800px;
}

.methodology .method-text strong {
  color: var(--text);
}

.methodology .method-sql {
  background: var(--sidebar-bg);
  border: 1px solid var(--card-border);
  border-radius: 10px;
  padding: 14px 18px;
  font-family: 'Consolas', 'SF Mono', 'Fira Code', monospace;
  font-size: 12px;
  line-height: 1.6;
  color: var(--accent);
  overflow-x: auto;
  white-space: pre-wrap;
  word-break: break-word;
}

.methodology .method-sql .kw {
  color: var(--accent-2);
}

.methodology .method-sql .cm {
  color: var(--text-muted);
  font-style: italic;
}

/* --- Responsive --- */
@media (max-width: 1200px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 900px) {
  .sidebar { display: none; }
  .content { margin-left: 0; padding: 20px 16px; }
  .grid-2, .grid-3 { grid-template-columns: 1fr; }
  .grid-4 { grid-template-columns: 1fr 1fr; }
}