:root {
  --color-primary: #0078D4;
  --color-primary-dark: #005A9E;
  --color-primary-light: #EFF6FC;
  --color-bg: #F3F2F1;
  --color-surface: #FFFFFF;
  --color-border: #EDEBE9;
  --color-text: #201F1E;
  --color-text-secondary: #605E5C;
  --color-text-muted: #A19F9D;
  --color-danger: #D13438;
  --color-danger-bg: #FDE7E9;
  --color-success: #107C10;
  --color-success-bg: #DFF6DD;
  --color-sidebar-bg: #1B1A19;
  --color-sidebar-text: #C8C6C4;
  --color-sidebar-hover: #323130;
  --color-sidebar-active: #0078D4;
  --sidebar-width: 240px;
  --header-height: 48px;
  --radius: 4px;
  --radius-lg: 8px;
  --shadow: 0 2px 8px rgba(0, 0, 0, 0.12);
  --shadow-lg: 0 4px 20px rgba(0, 0, 0, 0.16);
  --transition: 150ms ease;
}

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

body {
  font-family: "Segoe UI", system-ui, -apple-system, sans-serif;
  font-size: 14px;
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.5;
}

/* ── Login ─────────────────────────────── */

.login-body {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #0078D4 0%, #243A5E 100%);
}

.login-container {
  width: 100%;
  max-width: 420px;
  padding: 24px;
}

.login-card {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  padding: 40px 36px;
  box-shadow: var(--shadow-lg);
  text-align: center;
}

.login-logo {
  margin-bottom: 20px;
}

.logo-icon {
  width: 48px;
  height: 48px;
}

.login-title {
  font-size: 24px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 8px;
  letter-spacing: -0.2px;
}

.login-subtitle {
  color: var(--color-text-secondary);
  font-size: 14px;
  margin-bottom: 28px;
  line-height: 1.6;
}

.ms-signin-btn {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  background: var(--color-surface);
  color: var(--color-text);
  border: 1px solid #8A8886;
  border-radius: var(--radius);
  padding: 10px 20px;
  font-size: 15px;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  transition: background var(--transition), border-color var(--transition);
  width: 100%;
  justify-content: center;
}

.ms-signin-btn:hover {
  background: #F3F2F1;
  border-color: #605E5C;
}

.ms-logo { width: 20px; height: 20px; flex-shrink: 0; }

.login-note {
  margin-top: 20px;
  font-size: 12px;
  color: var(--color-text-muted);
}

.error-banner {
  background: var(--color-danger-bg);
  color: var(--color-danger);
  border: 1px solid #F1BFC0;
  border-radius: var(--radius);
  padding: 10px 14px;
  margin-bottom: 16px;
  font-size: 13px;
  text-align: left;
}

.hidden { display: none !important; }

/* ── App shell ──────────────────────────── */

.app-layout {
  display: flex;
  height: 100vh;
  overflow: hidden;
}

/* ── Sidebar ────────────────────────────── */

.sidebar {
  width: var(--sidebar-width);
  background: var(--color-sidebar-bg);
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
  overflow-y: auto;
}

.sidebar-header {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 16px;
  border-bottom: 1px solid #323130;
  text-decoration: none;
}

.sidebar-header .logo-icon { width: 28px; height: 28px; }

.sidebar-app-name {
  font-size: 16px;
  font-weight: 600;
  color: #FFFFFF;
  letter-spacing: -0.1px;
}

.sidebar-nav {
  flex: 1;
  padding: 8px 0;
}

.nav-section-label {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.8px;
  color: var(--color-text-muted);
  padding: 16px 16px 6px;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 9px 16px;
  color: var(--color-sidebar-text);
  text-decoration: none;
  cursor: pointer;
  border-left: 3px solid transparent;
  transition: background var(--transition), color var(--transition);
  font-size: 14px;
  border: none;
  background: none;
  width: 100%;
  text-align: left;
}

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

.nav-item.active {
  background: rgba(0, 120, 212, 0.2);
  color: #50E6FF;
  border-left: 3px solid var(--color-sidebar-active);
}

.nav-item svg { flex-shrink: 0; }

.sidebar-footer {
  padding: 12px;
  border-top: 1px solid #323130;
}

.user-info-sidebar {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px;
  border-radius: var(--radius);
  cursor: default;
}

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

.user-details { overflow: hidden; }

.user-name {
  font-size: 13px;
  font-weight: 600;
  color: #FFFFFF;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.user-email {
  font-size: 11px;
  color: var(--color-text-muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* ── Main content area ──────────────────── */

.main-area {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.top-bar {
  height: var(--header-height);
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 24px;
  flex-shrink: 0;
}

.page-title {
  font-size: 16px;
  font-weight: 600;
}

.top-bar-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

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

/* ── Buttons ────────────────────────────── */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 14px;
  border-radius: var(--radius);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  border: 1px solid transparent;
  transition: background var(--transition), border-color var(--transition), color var(--transition);
  text-decoration: none;
  line-height: 1.4;
}

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

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

.btn-default {
  background: var(--color-surface);
  color: var(--color-text);
  border-color: #8A8886;
}

.btn-default:hover { background: var(--color-bg); }

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

.btn-danger:hover { background: var(--color-danger-bg); }

.btn-ghost {
  background: transparent;
  color: var(--color-text-secondary);
  border-color: transparent;
  padding: 6px 10px;
}

.btn-ghost:hover { background: var(--color-bg); color: var(--color-text); }

.btn-sm {
  padding: 4px 10px;
  font-size: 12px;
}

/* ── Cards & sections ───────────────────── */

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

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

.card-header h2 {
  font-size: 15px;
  font-weight: 600;
}

.card-body { padding: 20px; }

/* ── Links table ────────────────────────── */

.links-toolbar {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 16px;
  flex-wrap: wrap;
}

.search-input-wrap {
  position: relative;
  flex: 1;
  min-width: 200px;
}

.search-input-wrap svg {
  position: absolute;
  left: 10px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--color-text-muted);
  pointer-events: none;
}

.search-input {
  width: 100%;
  padding: 7px 12px 7px 34px;
  border: 1px solid #8A8886;
  border-radius: var(--radius);
  font-size: 14px;
  color: var(--color-text);
  background: var(--color-surface);
  outline: none;
  transition: border-color var(--transition);
}

.search-input:focus { border-color: var(--color-primary); box-shadow: 0 0 0 2px rgba(0,120,212,0.15); }

.filter-select {
  padding: 7px 28px 7px 10px;
  border: 1px solid #8A8886;
  border-radius: var(--radius);
  font-size: 14px;
  color: var(--color-text);
  background: var(--color-surface);
  outline: none;
  cursor: pointer;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath d='M6 8L1 3h10z' fill='%23605E5C'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 8px center;
}

.filter-select:focus { border-color: var(--color-primary); }

.links-table {
  width: 100%;
  border-collapse: collapse;
}

.links-table th {
  text-align: left;
  padding: 10px 12px;
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--color-text-secondary);
  border-bottom: 1px solid var(--color-border);
  white-space: nowrap;
}

.links-table td {
  padding: 12px;
  border-bottom: 1px solid var(--color-border);
  vertical-align: middle;
}

.links-table tr:last-child td { border-bottom: none; }

.links-table tr:hover td { background: #FAF9F8; }

.link-title-cell { font-weight: 600; color: var(--color-text); }

.link-url-cell a {
  color: var(--color-primary);
  text-decoration: none;
  font-size: 13px;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.link-url-cell a:hover { text-decoration: underline; }

.badge {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 10px;
  font-size: 11px;
  font-weight: 600;
  background: var(--color-primary-light);
  color: var(--color-primary-dark);
}

.row-actions {
  display: flex;
  gap: 4px;
  opacity: 0;
  transition: opacity var(--transition);
}

.links-table tr:hover .row-actions { opacity: 1; }

.empty-state {
  text-align: center;
  padding: 48px 24px;
  color: var(--color-text-secondary);
}

.empty-state svg { color: var(--color-text-muted); margin-bottom: 12px; }

.empty-state p { font-size: 15px; margin-bottom: 6px; font-weight: 600; }

.empty-state span { font-size: 13px; }

/* ── 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;
  padding: 24px;
}

.modal {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  width: 100%;
  max-width: 520px;
  box-shadow: var(--shadow-lg);
  overflow: hidden;
}

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

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

.modal-body { padding: 20px; }

.modal-footer {
  display: flex;
  justify-content: flex-end;
  gap: 8px;
  padding: 12px 20px;
  border-top: 1px solid var(--color-border);
}

/* ── Form ───────────────────────────────── */

.form-group { margin-bottom: 16px; }

.form-label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 5px;
}

.form-label .required { color: var(--color-danger); margin-left: 2px; }

.form-input,
.form-textarea,
.form-select {
  width: 100%;
  padding: 7px 10px;
  border: 1px solid #8A8886;
  border-radius: var(--radius);
  font-size: 14px;
  font-family: inherit;
  color: var(--color-text);
  background: var(--color-surface);
  outline: none;
  transition: border-color var(--transition);
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 2px rgba(0,120,212,0.15);
}

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

.form-error {
  font-size: 12px;
  color: var(--color-danger);
  margin-top: 4px;
}

/* ── Toast notifications ────────────────── */

.toast-container {
  position: fixed;
  bottom: 24px;
  right: 24px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  z-index: 2000;
}

.toast {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 16px;
  background: var(--color-sidebar-bg);
  color: #FFFFFF;
  border-radius: var(--radius-lg);
  font-size: 13px;
  box-shadow: var(--shadow-lg);
  min-width: 260px;
  max-width: 360px;
  animation: slideIn 200ms ease;
}

.toast.success { border-left: 3px solid #6FCF97; }
.toast.error { border-left: 3px solid var(--color-danger); }

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

/* ── Responsive ─────────────────────────── */

@media (max-width: 768px) {
  .sidebar { width: 200px; }
  .links-table th:nth-child(3),
  .links-table td:nth-child(3),
  .links-table th:nth-child(5),
  .links-table td:nth-child(5) { display: none; }
}