:root {
  --prism-bg: #f8fafc;
  --prism-surface: #ffffff;
  --prism-border: #e2e8f0;
  --prism-text: #1e293b;
  --prism-text-secondary: #475569;
  --prism-text-muted: #94a3b8;
  --prism-primary: #7c3aed;
  --prism-primary-light: #ede9fe;
  --prism-primary-dark: #5b21b6;
  --prism-teal: #006083;
  --prism-success: #16a34a;
  --prism-success-light: #dcfce7;
  --prism-warning: #ea580c;
  --prism-warning-light: #fef3c7;
  --prism-error: #dc2626;
  --prism-error-light: #fee2e2;
  --prism-info: #2563eb;
  --prism-info-light: #dbeafe;
  --radius: 8px;
  --radius-lg: 12px;
}

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

body {
  font-family: 'Segoe UI', 'Roboto', Arial, sans-serif;
  background: var(--prism-bg);
  color: var(--prism-text);
  line-height: 1.5;
}

.app-shell {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Top Navigation Bar */
.app-topbar {
  height: 56px;
  background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
  display: flex;
  align-items: center;
  padding: 0 24px;
  gap: 16px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}

.app-topbar .logo {
  display: flex;
  align-items: center;
  gap: 10px;
  color: #fff;
  text-decoration: none;
}

.app-topbar .logo-icon {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  background: linear-gradient(135deg, #7c3aed, #06b6d4);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 14px;
  color: #fff;
}

.app-topbar .logo-text {
  font-size: 15px;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.app-topbar .logo-text .sub {
  font-size: 10px;
  font-weight: 500;
  color: #94a3b8;
  display: block;
  margin-top: -2px;
}

.app-topbar .nav-links {
  display: flex;
  gap: 4px;
  margin-left: 32px;
}

.app-topbar .nav-link {
  padding: 6px 14px;
  font-size: 13px;
  font-weight: 500;
  color: #94a3b8;
  text-decoration: none;
  border-radius: 6px;
  transition: all 0.15s;
}
.app-topbar .nav-link:hover { color: #fff; background: rgba(255,255,255,0.06); }
.app-topbar .nav-link.active { color: #a78bfa; background: rgba(124,58,237,0.15); }

.app-topbar .spacer { flex: 1; }

.app-topbar .user-badge {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  color: #e2e8f0;
}
.app-topbar .user-avatar {
  width: 28px; height: 28px; border-radius: 50%;
  background: linear-gradient(135deg, #7c3aed, #06b6d4);
  display: flex; align-items: center; justify-content: center;
  font-size: 11px; font-weight: 700; color: #fff;
}
.app-topbar .institution-badge {
  font-size: 10px;
  padding: 3px 8px;
  border-radius: 4px;
  background: rgba(37,99,235,0.15);
  color: #93c5fd;
  font-weight: 600;
}

/* Content area */
.app-content {
  flex: 1;
  padding: 24px;
  max-width: 1400px;
  margin: 0 auto;
  width: 100%;
}

/* Cards */
.card {
  background: var(--prism-surface);
  border: 1px solid var(--prism-border);
  border-radius: var(--radius-lg);
  padding: 20px;
  margin-bottom: 16px;
}

.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}

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

.card-subtitle {
  font-size: 12px;
  color: var(--prism-text-muted);
  margin-top: 2px;
}

/* Metrics */
.metrics-row {
  display: flex;
  gap: 12px;
  margin-bottom: 20px;
  flex-wrap: wrap;
}

.metric-card {
  flex: 1;
  min-width: 160px;
  background: var(--prism-surface);
  border: 1px solid var(--prism-border);
  border-radius: var(--radius);
  padding: 16px;
  text-align: center;
}

.metric-val {
  font-size: 28px;
  font-weight: 700;
  line-height: 1.1;
}

.metric-label {
  font-size: 11px;
  color: var(--prism-text-muted);
  margin-top: 4px;
}

/* Tables */
.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 12px;
}

.data-table th {
  background: #1e293b;
  color: #fff;
  padding: 8px 12px;
  text-align: left;
  font-weight: 600;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.data-table th:first-child { border-radius: 6px 0 0 0; }
.data-table th:last-child { border-radius: 0 6px 0 0; }

.data-table td {
  padding: 8px 12px;
  border-bottom: 1px solid var(--prism-border);
}

.data-table tr:nth-child(even) td { background: #f8fafc; }
.data-table tr:hover td { background: #f1f5f9; }

/* Tags/badges */
.tag {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 10px;
  font-weight: 600;
  white-space: nowrap;
}

.tag-success { background: var(--prism-success-light); color: var(--prism-success); }
.tag-warning { background: var(--prism-warning-light); color: #92400e; }
.tag-error { background: var(--prism-error-light); color: var(--prism-error); }
.tag-info { background: var(--prism-info-light); color: var(--prism-info); }
.tag-neutral { background: #f1f5f9; color: #475569; }
.tag-purple { background: #ede9fe; color: #6d28d9; }

/* Buttons */
.btn-sm {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 5px 12px;
  font-size: 12px;
  font-weight: 600;
  border-radius: 6px;
  border: 1px solid var(--prism-border);
  background: var(--prism-surface);
  color: var(--prism-text);
  cursor: pointer;
  transition: all 0.15s;
}
.btn-sm:hover { background: #f1f5f9; }

.btn-primary-sm {
  background: var(--prism-primary);
  color: #fff;
  border-color: var(--prism-primary);
}
.btn-primary-sm:hover { background: var(--prism-primary-dark); }

.btn-success-sm {
  background: var(--prism-success);
  color: #fff;
  border-color: var(--prism-success);
}

.btn-danger-sm {
  background: var(--prism-error);
  color: #fff;
  border-color: var(--prism-error);
}

/* Confidence bar */
.confidence-bar {
  height: 6px;
  border-radius: 3px;
  background: #e2e8f0;
  overflow: hidden;
}
.confidence-bar .fill {
  height: 100%;
  border-radius: 3px;
  transition: width 0.3s;
}

/* Status dots */
.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  display: inline-block;
}

.status-dot-success { background: var(--prism-success); }
.status-dot-warning { background: var(--prism-warning); }
.status-dot-error { background: var(--prism-error); }
.status-dot-info { background: var(--prism-info); }

/* Page header */
.page-header {
  margin-bottom: 24px;
}

.page-header h1 {
  font-size: 22px;
  font-weight: 700;
  color: var(--prism-text);
}

.page-header p {
  font-size: 13px;
  color: var(--prism-text-muted);
  margin-top: 4px;
}

/* Footer */
.app-footer {
  font-size: 10px;
  color: var(--prism-text-muted);
  text-align: center;
  padding: 16px;
  border-top: 1px solid var(--prism-border);
}

/* Sidebar layout */
.layout-sidebar {
  display: flex;
  gap: 0;
  flex: 1;
}

.sidebar {
  width: 240px;
  background: #0f172a;
  border-right: 1px solid rgba(255,255,255,0.06);
  padding: 16px 0;
}

.sidebar-link {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 20px;
  font-size: 13px;
  color: #94a3b8;
  text-decoration: none;
  transition: all 0.15s;
}
.sidebar-link:hover { color: #e2e8f0; background: rgba(255,255,255,0.04); }
.sidebar-link.active { color: #a78bfa; background: rgba(124,58,237,0.1); border-right: 2px solid #7c3aed; }

.sidebar-section {
  font-size: 10px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: #475569;
  padding: 16px 20px 6px;
}

/* Utility */
.text-success { color: var(--prism-success); }
.text-warning { color: var(--prism-warning); }
.text-error { color: var(--prism-error); }
.text-info { color: var(--prism-info); }
.text-muted { color: var(--prism-text-muted); }
.font-bold { font-weight: 700; }
.flex { display: flex; }
.flex-1 { flex: 1; }
.gap-12 { gap: 12px; }
.gap-16 { gap: 16px; }
.mt-16 { margin-top: 16px; }
.mb-16 { margin-bottom: 16px; }