/* ── Reset & Variables ──────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --sidebar-w: 240px;
  --topbar-h: 56px;

  --sidebar-bg: #1a1a1a;
  --sidebar-text: #d4d4d4;
  --sidebar-muted: #888;
  --sidebar-hover: #2a2a2a;
  --sidebar-active-bg: #2d2d2d;
  --sidebar-accent: #cf6547;

  --bg: #f5f5f4;
  --surface: #ffffff;
  --surface2: #fafaf9;
  --border: #e7e5e4;
  --border-strong: #d6d3d1;

  --text: #1c1917;
  --text-2: #57534e;
  --text-3: #a8a29e;

  --accent: #cf6547;
  --accent-hover: #b85a3e;
  --accent-light: #fdf2ee;

  --success: #16a34a;
  --success-light: #f0fdf4;
  --warning: #d97706;
  --warning-light: #fffbeb;
  --danger: #dc2626;
  --danger-light: #fef2f2;
  --info: #2563eb;
  --info-light: #eff6ff;

  --radius: 8px;
  --radius-lg: 12px;
  --shadow: 0 1px 3px rgba(0,0,0,0.08), 0 1px 2px rgba(0,0,0,0.06);
  --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.1), 0 2px 4px -1px rgba(0,0,0,0.06);

  --font: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Helvetica Neue', Arial, sans-serif;
  --font-mono: 'SF Mono', 'Fira Code', 'Cascadia Code', Consolas, monospace;
}

html, body { height: 100%; font-family: var(--font); color: var(--text); background: var(--bg); }

/* ── Auth Screen ────────────────────────────────────────────── */
#auth-screen {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg);
}

.auth-container { width: 100%; max-width: 380px; padding: 0 16px; }

.auth-logo {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  font-size: 22px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 28px;
}

.auth-logo-icon {
  width: 40px;
  height: 40px;
  background: var(--accent);
  color: #fff;
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  font-weight: 800;
}

.auth-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px;
  box-shadow: var(--shadow-md);
}

.auth-title {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 20px;
  color: var(--text);
}

.auth-switch {
  text-align: center;
  margin-top: 16px;
  font-size: 14px;
  color: var(--text-2);
}
.auth-switch a { color: var(--accent); text-decoration: none; font-weight: 500; }
.auth-switch a:hover { text-decoration: underline; }

/* ── Layout ──────────────────────────────────────────────────── */
#app {
  display: flex;
  height: 100vh;
  overflow: hidden;
}

.sidebar {
  width: var(--sidebar-w);
  min-width: var(--sidebar-w);
  background: var(--sidebar-bg);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.sidebar-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 18px 16px;
  border-bottom: 1px solid #2a2a2a;
}

.brand-icon {
  width: 32px;
  height: 32px;
  background: var(--accent);
  color: #fff;
  border-radius: 7px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 15px;
  font-weight: 800;
  flex-shrink: 0;
}

.brand-name {
  font-size: 16px;
  font-weight: 700;
  color: #f5f5f4;
  letter-spacing: -0.01em;
}

.sidebar-nav {
  flex: 1;
  overflow-y: auto;
  padding: 8px;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 10px;
  width: 100%;
  padding: 9px 12px;
  border: none;
  background: none;
  border-radius: var(--radius);
  color: var(--sidebar-text);
  font-size: 14px;
  font-family: var(--font);
  cursor: pointer;
  text-align: left;
  transition: background 0.15s, color 0.15s;
  margin-bottom: 1px;
}

.nav-item:hover { background: var(--sidebar-hover); color: #fff; }

.nav-item.active {
  background: var(--sidebar-active-bg);
  color: #fff;
  border-left: 3px solid var(--sidebar-accent);
  padding-left: 9px;
}

.nav-icon { font-size: 16px; width: 20px; text-align: center; flex-shrink: 0; }

.nav-section {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--sidebar-muted);
  padding: 16px 12px 6px;
}

.sidebar-footer {
  padding: 12px;
  border-top: 1px solid #2a2a2a;
}

.sidebar-user {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 4px;
  margin-bottom: 8px;
}

.user-avatar {
  width: 32px;
  height: 32px;
  background: #3a3a3a;
  color: #d4d4d4;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  font-weight: 600;
  flex-shrink: 0;
}

.user-meta { flex: 1; min-width: 0; }
.user-name { font-size: 13px; font-weight: 600; color: #e5e5e5; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.user-role-badge { font-size: 11px; color: var(--sidebar-muted); margin-top: 1px; }

.sidebar-logout {
  width: 100%;
  padding: 7px 12px;
  background: #2a2a2a;
  border: 1px solid #333;
  border-radius: var(--radius);
  color: var(--sidebar-text);
  font-size: 13px;
  cursor: pointer;
  transition: background 0.15s;
}
.sidebar-logout:hover { background: #333; color: #fff; }

/* ── Main Area ───────────────────────────────────────────────── */
.main {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  min-width: 0;
}

.topbar {
  height: var(--topbar-h);
  min-height: var(--topbar-h);
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 24px;
}

.topbar h1 {
  font-size: 17px;
  font-weight: 600;
  color: var(--text);
}

.topbar-actions { display: flex; gap: 8px; }

.content {
  flex: 1;
  overflow-y: auto;
  padding: 24px;
}

/* ── Cards ───────────────────────────────────────────────────── */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 20px;
  box-shadow: var(--shadow);
}

.card-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 16px;
  margin-bottom: 24px;
}

.stat-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 20px;
  box-shadow: var(--shadow);
}

.stat-value {
  font-size: 32px;
  font-weight: 700;
  color: var(--accent);
  line-height: 1;
  margin-bottom: 4px;
}

.stat-label {
  font-size: 13px;
  color: var(--text-2);
}

/* ── Section Layout ──────────────────────────────────────────── */
.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}

.section-title {
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
}

/* ── Forms ───────────────────────────────────────────────────── */
.form-group {
  margin-bottom: 14px;
}

.form-group label {
  display: block;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-2);
  margin-bottom: 5px;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 8px 12px;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius);
  font-size: 14px;
  font-family: var(--font);
  color: var(--text);
  background: var(--surface);
  transition: border-color 0.15s, box-shadow 0.15s;
  outline: none;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(207,101,71,0.12);
}

.form-group textarea { resize: vertical; min-height: 80px; }

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.form-error {
  font-size: 13px;
  color: var(--danger);
  background: var(--danger-light);
  border: 1px solid #fecaca;
  border-radius: var(--radius);
  padding: 8px 12px;
  margin-bottom: 12px;
}

/* ── Buttons ─────────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 14px;
  border: none;
  border-radius: var(--radius);
  font-size: 14px;
  font-family: var(--font);
  font-weight: 500;
  cursor: pointer;
  transition: background 0.15s, opacity 0.15s;
  text-decoration: none;
  white-space: nowrap;
}

.btn:disabled { opacity: 0.5; cursor: not-allowed; }
.btn-sm { padding: 5px 10px; font-size: 13px; }
.btn-block { width: 100%; justify-content: center; }

.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover:not(:disabled) { background: var(--accent-hover); }

.btn-secondary { background: #f5f5f4; color: var(--text); border: 1px solid var(--border-strong); }
.btn-secondary:hover:not(:disabled) { background: #e9e9e7; }

.btn-ghost { background: transparent; color: var(--text-2); }
.btn-ghost:hover:not(:disabled) { background: var(--bg); }

.btn-danger { background: var(--danger); color: #fff; }
.btn-danger:hover:not(:disabled) { background: #b91c1c; }

.btn-success { background: var(--success); color: #fff; }
.btn-success:hover:not(:disabled) { background: #15803d; }

/* ── Tables ──────────────────────────────────────────────────── */
.table-wrap {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow);
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}

thead th {
  background: var(--surface2);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  color: var(--text-2);
  padding: 10px 14px;
  text-align: left;
  border-bottom: 1px solid var(--border);
}

tbody tr:hover { background: var(--surface2); }

td {
  padding: 11px 14px;
  border-bottom: 1px solid var(--border);
  color: var(--text);
  vertical-align: middle;
}

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

/* ── Badges ──────────────────────────────────────────────────── */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 2px 8px;
  border-radius: 99px;
  font-size: 12px;
  font-weight: 500;
}

.badge-green { background: var(--success-light); color: #15803d; }
.badge-yellow { background: var(--warning-light); color: #92400e; }
.badge-red { background: var(--danger-light); color: #b91c1c; }
.badge-blue { background: var(--info-light); color: #1d4ed8; }
.badge-gray { background: #f5f5f4; color: var(--text-2); }
.badge-orange { background: var(--accent-light); color: #9a3412; }

/* ── Upload Zone ─────────────────────────────────────────────── */
.upload-zone {
  border: 2px dashed var(--border-strong);
  border-radius: var(--radius-lg);
  padding: 32px 20px;
  text-align: center;
  cursor: pointer;
  transition: border-color 0.2s, background 0.2s;
  background: var(--surface);
}

.upload-zone:hover, .upload-zone.dragover {
  border-color: var(--accent);
  background: var(--accent-light);
}

.upload-zone input[type=file] { display: none; }
.upload-icon { font-size: 32px; margin-bottom: 8px; }
.upload-text { font-size: 14px; color: var(--text-2); }
.upload-hint { font-size: 12px; color: var(--text-3); margin-top: 4px; }

/* ── Error List ──────────────────────────────────────────────── */
.error-list { display: flex; flex-direction: column; gap: 8px; }

.error-item {
  background: var(--surface);
  border: 1px solid var(--border);
  border-left: 3px solid var(--danger);
  border-radius: var(--radius);
  padding: 10px 14px;
}

.error-item.warning { border-left-color: var(--warning); }
.error-item.info { border-left-color: var(--info); }

.error-message { font-size: 14px; font-weight: 500; color: var(--text); }
.error-context { font-size: 13px; color: var(--text-2); font-family: var(--font-mono); margin-top: 3px; }
.error-rule { font-size: 11px; color: var(--text-3); margin-top: 2px; }
.error-suggestion { font-size: 13px; color: var(--success); margin-top: 4px; }

/* ── PDF Viewer ──────────────────────────────────────────────── */
.pdf-viewer-wrap {
  background: #525659;
  border-radius: var(--radius-lg);
  overflow: hidden;
  position: relative;
  min-height: 400px;
}

.pdf-canvas-container {
  position: relative;
  display: inline-block;
}

#pdf-canvas {
  display: block;
  max-width: 100%;
}

.pdf-toolbar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  background: #3c3f41;
  color: #e5e5e5;
  font-size: 13px;
}

.pdf-page-info { flex: 1; text-align: center; }

/* ── Tabs ────────────────────────────────────────────────────── */
.tabs { display: flex; gap: 2px; border-bottom: 2px solid var(--border); margin-bottom: 20px; }

.tab {
  padding: 8px 16px;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-2);
  background: none;
  border: none;
  cursor: pointer;
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
  transition: color 0.15s;
}

.tab:hover { color: var(--text); }
.tab.active { color: var(--accent); border-bottom-color: var(--accent); }

/* ── Modal ───────────────────────────────────────────────────── */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.4);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
}

.modal {
  background: var(--surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  width: 100%;
  max-width: 560px;
  max-height: 90vh;
  display: flex;
  flex-direction: column;
  margin: 16px;
}

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

.modal-header h3 { font-size: 16px; font-weight: 600; }

.modal-close {
  width: 28px;
  height: 28px;
  border: none;
  background: var(--bg);
  border-radius: 6px;
  cursor: pointer;
  font-size: 18px;
  color: var(--text-2);
  display: flex;
  align-items: center;
  justify-content: center;
  line-height: 1;
}
.modal-close:hover { background: var(--border); }

.modal-body {
  padding: 20px;
  overflow-y: auto;
  flex: 1;
}

/* ── Rubric ──────────────────────────────────────────────────── */
.rubric-row {
  display: grid;
  grid-template-columns: 1fr 80px 80px 28px;
  gap: 8px;
  align-items: center;
  margin-bottom: 8px;
}

/* ── Toast ───────────────────────────────────────────────────── */
#toast-container {
  position: fixed;
  bottom: 20px;
  right: 20px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  z-index: 2000;
}

.toast {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 16px;
  background: var(--text);
  color: #fff;
  border-radius: var(--radius);
  font-size: 14px;
  box-shadow: var(--shadow-md);
  animation: slideIn 0.2s ease;
  max-width: 320px;
}

.toast.success { background: var(--success); }
.toast.error { background: var(--danger); }
.toast.warning { background: var(--warning); }

@keyframes slideIn {
  from { transform: translateX(100%); opacity: 0; }
  to { transform: translateX(0); opacity: 1; }
}

/* ── Utilities ───────────────────────────────────────────────── */
.hidden { display: none !important; }
.mt-4 { margin-top: 16px; }
.mt-6 { margin-top: 24px; }
.mb-4 { margin-bottom: 16px; }
.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.gap-2 { gap: 8px; }
.gap-3 { gap: 12px; }
.text-sm { font-size: 13px; }
.text-muted { color: var(--text-2); }
.text-xs { font-size: 12px; color: var(--text-3); }
.font-semibold { font-weight: 600; }
.w-full { width: 100%; }
.empty-state {
  text-align: center;
  padding: 48px 20px;
  color: var(--text-3);
}
.empty-icon { font-size: 36px; margin-bottom: 10px; }
.empty-text { font-size: 14px; }

/* ── Responsive ──────────────────────────────────────────────── */
@media (max-width: 768px) {
  .sidebar { display: none; }
  .form-row { grid-template-columns: 1fr; }
  .card-grid { grid-template-columns: 1fr; }
}