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

:root {
  --bg: #f8fafc;
  --bg-card: #ffffff;
  --bg-sidebar: #0f172a;
  --bg-sidebar-hover: #1e293b;
  --bg-sidebar-active: #1e40af;
  --text: #0f172a;
  --text-secondary: #64748b;
  --text-tertiary: #94a3b8;
  --text-sidebar: #cbd5e1;
  --text-sidebar-active: #ffffff;
  --border: #e2e8f0;
  --border-light: #f1f5f9;
  --primary: #2563eb;
  --primary-hover: #1d4ed8;
  --primary-light: #eff6ff;
  --success: #16a34a;
  --success-light: #f0fdf4;
  --warning: #d97706;
  --warning-light: #fffbeb;
  --danger: #dc2626;
  --danger-light: #fef2f2;
  --purple: #7c3aed;
  --purple-light: #f5f3ff;
  --radius: 6px;
  --radius-lg: 10px;
  --shadow-sm: 0 1px 2px rgba(0,0,0,.05);
  --shadow: 0 1px 3px rgba(0,0,0,.08), 0 1px 2px rgba(0,0,0,.04);
  --shadow-md: 0 4px 6px rgba(0,0,0,.06), 0 2px 4px rgba(0,0,0,.04);
  --sidebar-width: 240px;
  --topbar-height: 56px;
  --transition: 150ms ease;
}

html { height: 100%; }

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  font-size: 14px;
  line-height: 1.5;
  color: var(--text);
  background: var(--bg);
  height: 100%;
  -webkit-font-smoothing: antialiased;
}

/* ─── Login Page ─── */
.login-page {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  background: linear-gradient(135deg, #0f172a 0%, #1e293b 50%, #0f172a 100%);
}

.login-container {
  width: 100%;
  max-width: 400px;
  padding: 24px;
}

.login-card {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  padding: 40px 32px;
  box-shadow: 0 20px 60px rgba(0,0,0,.3);
}

.login-header {
  text-align: center;
  margin-bottom: 32px;
}

.login-header svg {
  margin-bottom: 16px;
}

.login-header h1 {
  font-size: 20px;
  font-weight: 700;
  color: var(--text);
  line-height: 1.3;
  margin-bottom: 4px;
}

.login-subtitle {
  font-size: 13px;
  color: var(--text-secondary);
}

.login-form {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.form-group label {
  font-size: 13px;
  font-weight: 500;
  color: var(--text);
}

.form-group input {
  height: 40px;
  padding: 0 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 14px;
  font-family: inherit;
  color: var(--text);
  background: var(--bg-card);
  transition: border-color var(--transition), box-shadow var(--transition);
  outline: none;
}

.form-group input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(37,99,235,.12);
}

.form-group input::placeholder {
  color: var(--text-tertiary);
}

.login-footer {
  margin-top: 24px;
  text-align: center;
  font-size: 12px;
  color: var(--text-secondary);
}

.login-footer strong {
  color: var(--text);
  font-weight: 600;
}

/* ─── Alert ─── */
.alert {
  padding: 10px 14px;
  border-radius: var(--radius);
  font-size: 13px;
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 8px;
}

.alert-error {
  background: var(--danger-light);
  color: var(--danger);
  border: 1px solid #fecaca;
}

/* ─── Buttons ─── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 40px;
  padding: 0 20px;
  border: none;
  border-radius: var(--radius);
  font-size: 14px;
  font-weight: 500;
  font-family: inherit;
  cursor: pointer;
  transition: background var(--transition), box-shadow var(--transition);
  text-decoration: none;
}

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

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

.btn-block {
  width: 100%;
}

/* ─── App Layout ─── */
.app-layout {
  display: flex;
  height: 100vh;
  overflow: hidden;
}

/* ─── Sidebar ─── */
.sidebar {
  width: var(--sidebar-width);
  min-width: var(--sidebar-width);
  height: 100vh;
  background: var(--bg-sidebar);
  display: flex;
  flex-direction: column;
  transition: transform var(--transition);
  z-index: 100;
}

.sidebar-header {
  padding: 16px 16px 12px;
  border-bottom: 1px solid rgba(255,255,255,.08);
}

.sidebar-logo {
  display: flex;
  align-items: center;
  gap: 10px;
}

.sidebar-brand {
  display: flex;
  flex-direction: column;
}

.brand-name {
  font-size: 16px;
  font-weight: 700;
  color: #fff;
  letter-spacing: .5px;
}

.brand-version {
  font-size: 11px;
  color: var(--text-tertiary);
}

.sidebar-nav {
  flex: 1;
  padding: 12px 8px;
  overflow-y: auto;
}

.nav-section {
  margin-bottom: 20px;
}

.nav-label {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .08em;
  color: var(--text-tertiary);
  padding: 0 12px;
  margin-bottom: 6px;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 12px;
  border-radius: var(--radius);
  color: var(--text-sidebar);
  text-decoration: none;
  font-size: 13px;
  font-weight: 450;
  transition: background var(--transition), color var(--transition);
}

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

.nav-item.active {
  background: var(--bg-sidebar-active);
  color: var(--text-sidebar-active);
  font-weight: 500;
}

.nav-item.disabled {
  opacity: .4;
  pointer-events: none;
}

.sidebar-footer {
  padding: 12px 12px;
  border-top: 1px solid rgba(255,255,255,.08);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}

.user-info {
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
}

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

.user-details {
  min-width: 0;
}

.user-name {
  font-size: 13px;
  font-weight: 500;
  color: #fff;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.user-role {
  font-size: 11px;
  color: var(--text-tertiary);
  text-transform: capitalize;
}

.logout-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: var(--radius);
  color: var(--text-tertiary);
  text-decoration: none;
  transition: background var(--transition), color var(--transition);
  flex-shrink: 0;
}

.logout-btn:hover {
  background: rgba(239,68,68,.15);
  color: #ef4444;
}

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

/* ─── Topbar ─── */
.topbar {
  height: var(--topbar-height);
  min-height: var(--topbar-height);
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 0 24px;
  background: var(--bg-card);
  border-bottom: 1px solid var(--border);
}

.sidebar-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border: none;
  border-radius: var(--radius);
  background: none;
  color: var(--text-secondary);
  cursor: pointer;
}

.sidebar-toggle:hover {
  background: var(--border-light);
}

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

.topbar-right {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 12px;
}

.topbar-org {
  font-size: 13px;
  color: var(--text-secondary);
}

/* ─── Main Content ─── */
.main-content {
  flex: 1;
  overflow-y: auto;
  padding: 24px;
}

/* ─── Stats Grid ─── */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-bottom: 24px;
}

.stat-card {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 18px 16px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
}

.stat-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.stat-icon-blue  { background: var(--primary-light); color: var(--primary); }
.stat-icon-green { background: var(--success-light); color: var(--success); }
.stat-icon-amber { background: var(--warning-light); color: var(--warning); }
.stat-icon-purple { background: var(--purple-light); color: var(--purple); }

.stat-value {
  font-size: 24px;
  font-weight: 700;
  color: var(--text);
  line-height: 1;
}

.stat-label {
  font-size: 12px;
  color: var(--text-secondary);
  margin-top: 2px;
}

/* ─── Content Grid ─── */
.content-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.content-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 14px 18px;
  border-bottom: 1px solid var(--border-light);
}

.card-header h2 {
  font-size: 14px;
  font-weight: 600;
  color: var(--text);
}

.card-link {
  font-size: 12px;
  font-weight: 500;
  color: var(--primary);
  text-decoration: none;
}

.card-link:hover {
  text-decoration: underline;
}

.card-body {
  padding: 4px 0;
}

/* ─── Page Header Bar ─── */
.page-header-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 16px;
}

.page-header-bar h2 {
  font-size: 18px;
  font-weight: 600;
}

/* ─── Data Table ─── */
.data-table {
  width: 100%;
  border-collapse: collapse;
}

.data-table th {
  padding: 10px 18px;
  text-align: left;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .06em;
  color: var(--text-secondary);
  background: var(--border-light);
}

.data-table td {
  padding: 10px 18px;
  font-size: 13px;
  color: var(--text);
  border-top: 1px solid var(--border-light);
}

.data-table tbody tr:hover {
  background: var(--border-light);
}

.font-medium { font-weight: 500; }
.text-secondary { color: var(--text-secondary); }
.text-center { text-align: center; }

/* ─── Badges ─── */
.code-badge {
  display: inline-block;
  padding: 2px 8px;
  font-size: 12px;
  font-weight: 500;
  font-family: 'SF Mono', 'Fira Code', monospace;
  background: var(--border-light);
  color: var(--text);
  border-radius: 4px;
}

.type-badge {
  display: inline-block;
  padding: 2px 8px;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .04em;
  background: var(--primary-light);
  color: var(--primary);
  border-radius: 4px;
}

.status-badge {
  display: inline-block;
  padding: 2px 10px;
  font-size: 11px;
  font-weight: 600;
  border-radius: 20px;
  text-transform: capitalize;
  white-space: nowrap;
}

.status-active,
.status-approved {
  background: var(--success-light);
  color: var(--success);
}

.status-draft {
  background: var(--border-light);
  color: var(--text-secondary);
}

.status-submitted {
  background: var(--primary-light);
  color: var(--primary);
}

.status-in_review,
.status-under_review {
  background: var(--warning-light);
  color: var(--warning);
}

.status-closed,
.status-rejected {
  background: var(--danger-light);
  color: var(--danger);
}

.status-lock-banner {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 20px;
  margin-bottom: 20px;
  border-radius: var(--radius-lg);
  font-size: 14px;
  font-weight: 500;
}

.status-lock-banner.locked {
  background: var(--warning-light);
  color: #92400e;
  border: 1px solid #fde68a;
}

.status-lock-banner svg {
  flex-shrink: 0;
}

.status-dropdown {
  position: relative;
  display: inline-block;
}

.status-dropdown-btn {
  background: none;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2px 8px;
  font-size: 11px;
  cursor: pointer;
  color: var(--text-secondary);
  transition: all var(--transition);
}

.status-dropdown-btn:hover {
  background: var(--border-light);
  color: var(--text);
}

.status-dropdown-btn.btn-reopen {
  color: #b45309;
  border-color: #b45309;
}

.status-dropdown-btn.btn-reopen:hover {
  background: #fef3c7;
  color: #92400e;
}

.status-dropdown-menu {
  display: none;
  position: absolute;
  top: 100%;
  right: 0;
  z-index: 50;
  min-width: 160px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-md);
  padding: 4px 0;
  margin-top: 4px;
}

.status-dropdown-menu.open {
  display: block;
}

.status-dropdown-menu button {
  display: block;
  width: 100%;
  padding: 8px 14px;
  background: none;
  border: none;
  text-align: left;
  font-size: 13px;
  cursor: pointer;
  color: var(--text);
  transition: background var(--transition);
}

.status-dropdown-menu button:hover {
  background: var(--border-light);
}

/* ─── Empty State ─── */
.empty-state {
  padding: 40px 24px;
  text-align: center;
  color: var(--text-tertiary);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
}

.empty-state svg {
  opacity: .5;
}

/* ─── Responsive ─── */
@media (max-width: 1024px) {
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .content-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .sidebar {
    position: fixed;
    left: 0;
    top: 0;
    transform: translateX(-100%);
  }

  .sidebar.open {
    transform: translateX(0);
  }

  .sidebar-toggle {
    display: flex;
  }

  .stats-grid {
    grid-template-columns: 1fr 1fr;
  }

  .main-content {
    padding: 16px;
  }
}

/* ─── Form Grid ─── */
.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-bottom: 24px;
}

.form-group-full {
  grid-column: 1 / -1;
}

.form-group select {
  height: 40px;
  padding: 0 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 14px;
  font-family: inherit;
  color: var(--text);
  background: var(--bg-card);
  transition: border-color var(--transition), box-shadow var(--transition);
  outline: none;
}

.form-group select:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(37,99,235,.12);
}

.form-actions {
  display: flex;
  gap: 12px;
  justify-content: flex-end;
  padding-top: 16px;
  border-top: 1px solid var(--border);
}

.required {
  color: var(--danger);
}

.status-archived {
  background: var(--border-light);
  color: var(--text-tertiary);
}

.btn-sm {
  height: 32px;
  padding: 0 12px;
  font-size: 12px;
}

.detail-value {
  padding: 8px 0;
  font-size: 14px;
  color: var(--text-primary);
}

.btn-danger {
  background: #dc2626;
  color: #fff;
  border: 1px solid #dc2626;
}

.btn-danger:hover {
  background: #b91c1c;
}

.filter-bar .form-grid {
  align-items: end;
}

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

  .form-grid {
    grid-template-columns: 1fr;
  }
}

.sign-off-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  margin-top: 1rem;
}

@media (max-width: 768px) {
  .sign-off-grid {
    grid-template-columns: 1fr;
  }
}

.sign-off-block {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem;
  background: var(--bg-card);
}

.sign-off-block h4 {
  margin: 0 0 1rem 0;
  font-size: 14px;
  font-weight: 600;
  color: var(--text);
}

.sign-off-block .form-group {
  margin-bottom: 0.75rem;
}

.signature-canvas {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  cursor: crosshair;
  background: #fff;
  display: block;
  width: 100%;
  height: 120px;
  touch-action: none;
}

.signature-controls {
  display: flex;
  gap: 8px;
  margin-top: 8px;
  flex-wrap: wrap;
}

.signature-controls .btn {
  font-size: 12px;
  padding: 4px 12px;
}

.signature-display {
  margin-top: 0.5rem;
}

.signature-display img {
  max-width: 100%;
  max-height: 120px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: #fff;
}

.signed-info {
  display: flex;
  align-items: center;
  gap: 6px;
  color: #16a34a;
  font-size: 13px;
  font-weight: 500;
  margin-top: 0.5rem;
}

.signed-info svg {
  flex-shrink: 0;
}

.sign-off-approved-banner {
  background: #f0fdf4;
  border: 1px solid #bbf7d0;
  border-radius: var(--radius);
  padding: 12px 16px;
  color: #166534;
  font-weight: 500;
  font-size: 14px;
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  gap: 8px;
}

.file-upload-label {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  cursor: pointer;
  font-size: 12px;
  padding: 4px 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg-card);
  color: var(--text-secondary);
  transition: all var(--transition);
}

.file-upload-label:hover {
  background: var(--border-light);
  color: var(--text);
}

.file-upload-label input[type="file"] {
  display: none;
}