/* ============================================================
   HEYDON HALL — Knowledge Base Styles
   Premium dark theme with glassmorphism
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');

:root {
  --bg-primary: #0f1117;
  --bg-secondary: #161822;
  --bg-tertiary: #1c1f2e;
  --bg-card: rgba(28, 31, 46, 0.7);
  --bg-glass: rgba(22, 24, 34, 0.85);
  --bg-hover: rgba(124, 141, 255, 0.08);
  --bg-active: rgba(124, 141, 255, 0.15);

  --text-primary: #e8eaf0;
  --text-secondary: #9499ae;
  --text-muted: #636882;
  --text-link: #7c8dff;
  --text-link-hover: #a3b0ff;

  --accent: #7c8dff;
  --accent-glow: rgba(124, 141, 255, 0.25);
  --accent-green: #4ade80;
  --accent-amber: #fbbf24;
  --accent-red: #f87171;
  --accent-cyan: #22d3ee;

  --border: rgba(255, 255, 255, 0.06);
  --border-hover: rgba(124, 141, 255, 0.3);

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
  --radius-xl: 20px;

  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.2);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.4);
  --shadow-glow: 0 0 20px var(--accent-glow);

  --sidebar-width: 280px;
  --header-height: 60px;

  --transition: 200ms cubic-bezier(0.4, 0, 0.2, 1);
}

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

html { font-size: 15px; scroll-behavior: smooth; }

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.65;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--text-link);
  text-decoration: none;
  transition: color var(--transition);
}
a:hover { color: var(--text-link-hover); }

/* ============================================================
   LAYOUT
   ============================================================ */

.layout {
  display: flex;
  min-height: 100vh;
}

/* --- Sidebar --- */
.sidebar {
  width: var(--sidebar-width);
  background: var(--bg-glass);
  backdrop-filter: blur(20px);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  z-index: 100;
  overflow: hidden;
  transition: transform var(--transition);
}

.sidebar-brand {
  padding: 20px 20px 16px;
  border-bottom: 1px solid var(--border);
}

.sidebar-brand h1 {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.01em;
}

.sidebar-brand .brand-sub {
  font-size: 0.72rem;
  color: var(--text-muted);
  margin-top: 2px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.sidebar-nav {
  flex: 1;
  overflow-y: auto;
  padding: 12px 0;
}

.sidebar-nav::-webkit-scrollbar { width: 4px; }
.sidebar-nav::-webkit-scrollbar-track { background: transparent; }
.sidebar-nav::-webkit-scrollbar-thumb { background: var(--border); border-radius: 2px; }

.nav-section {
  margin-bottom: 4px;
}

.nav-section-title {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 20px;
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  cursor: pointer;
  user-select: none;
  transition: color var(--transition);
}
.nav-section-title:hover { color: var(--text-secondary); }

.nav-section-title .chevron {
  font-size: 0.6rem;
  transition: transform var(--transition);
}
.nav-section.collapsed .chevron { transform: rotate(-90deg); }
.nav-section.collapsed .nav-items { display: none; }

.nav-items { list-style: none; }

.nav-item a {
  display: block;
  padding: 5px 20px 5px 36px;
  font-size: 0.85rem;
  color: var(--text-secondary);
  transition: all var(--transition);
  border-left: 2px solid transparent;
}
.nav-item a:hover {
  color: var(--text-primary);
  background: var(--bg-hover);
  border-left-color: var(--accent);
}
.nav-item a.active {
  color: var(--accent);
  background: var(--bg-active);
  border-left-color: var(--accent);
  font-weight: 500;
}

.sidebar-footer {
  padding: 12px 20px;
  border-top: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.sidebar-footer .user-info {
  font-size: 0.8rem;
  color: var(--text-secondary);
}
.sidebar-footer .user-info strong {
  color: var(--text-primary);
  font-weight: 500;
}

.sidebar-footer .footer-links {
  display: flex;
  gap: 12px;
}
.sidebar-footer .footer-links a {
  font-size: 0.75rem;
  color: var(--text-muted);
}
.sidebar-footer .footer-links a:hover { color: var(--accent); }

/* --- Main --- */
.main {
  flex: 1;
  margin-left: var(--sidebar-width);
  min-height: 100vh;
}

/* --- Header --- */
.header {
  height: var(--header-height);
  background: var(--bg-glass);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  padding: 0 32px;
  position: sticky;
  top: 0;
  z-index: 50;
  gap: 16px;
}

.header .menu-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text-primary);
  font-size: 1.3rem;
  cursor: pointer;
  padding: 4px;
}

.header .search-bar {
  flex: 1;
  max-width: 500px;
  position: relative;
}

.header .search-bar input {
  width: 100%;
  padding: 8px 16px 8px 38px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  color: var(--text-primary);
  font-family: inherit;
  font-size: 0.85rem;
  outline: none;
  transition: all var(--transition);
}
.header .search-bar input::placeholder { color: var(--text-muted); }
.header .search-bar input:focus {
  border-color: var(--border-hover);
  box-shadow: var(--shadow-glow);
}

.header .search-bar .search-icon {
  position: absolute;
  left: 12px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  font-size: 0.85rem;
}

.header-right {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-left: auto;
}

.header-right .nav-link {
  font-size: 0.85rem;
  color: var(--text-secondary);
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  transition: all var(--transition);
}
.header-right .nav-link:hover {
  color: var(--text-primary);
  background: var(--bg-hover);
}

/* --- Content --- */
.content {
  padding: 32px;
  max-width: 960px;
}

.content-wide {
  padding: 32px;
  max-width: 1200px;
}

/* ============================================================
   MARKDOWN / PAGE CONTENT
   ============================================================ */

.page-content h1 {
  font-size: 2rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 8px;
  letter-spacing: -0.02em;
  line-height: 1.2;
}

.page-content h2 {
  font-size: 1.35rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-top: 40px;
  margin-bottom: 12px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border);
}

.page-content h3 {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-top: 28px;
  margin-bottom: 8px;
}

.page-content p { margin-bottom: 12px; color: var(--text-secondary); }

.page-content ul, .page-content ol {
  margin-bottom: 12px;
  padding-left: 20px;
}

.page-content li {
  margin-bottom: 4px;
  color: var(--text-secondary);
}

.page-content code {
  background: var(--bg-tertiary);
  padding: 2px 7px;
  border-radius: var(--radius-sm);
  font-size: 0.82rem;
  color: var(--accent-cyan);
  border: 1px solid var(--border);
}

.page-content pre {
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 16px;
  overflow-x: auto;
  margin-bottom: 16px;
}
.page-content pre code {
  background: none;
  border: none;
  padding: 0;
  color: var(--text-primary);
}

.page-content blockquote {
  border-left: 3px solid var(--accent);
  padding: 12px 16px;
  margin-bottom: 16px;
  background: var(--bg-hover);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  color: var(--text-secondary);
}

.page-content table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 20px;
  font-size: 0.88rem;
}

.page-content th {
  background: var(--bg-tertiary);
  padding: 10px 14px;
  text-align: left;
  font-weight: 600;
  color: var(--text-primary);
  border: 1px solid var(--border);
}

.page-content td {
  padding: 8px 14px;
  border: 1px solid var(--border);
  color: var(--text-secondary);
}

.page-content tr:hover td {
  background: var(--bg-hover);
}

.page-content hr {
  border: none;
  border-top: 1px solid var(--border);
  margin: 28px 0;
}

.page-content img {
  max-width: 100%;
  border-radius: var(--radius-md);
}

.page-content a {
  color: var(--text-link);
  border-bottom: 1px solid transparent;
  transition: all var(--transition);
}
.page-content a:hover {
  color: var(--text-link-hover);
  border-bottom-color: var(--text-link-hover);
}

/* ============================================================
   FILE BROWSER
   ============================================================ */

.breadcrumbs {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-bottom: 20px;
  font-size: 0.85rem;
  flex-wrap: wrap;
}
.breadcrumbs a { color: var(--text-link); }
.breadcrumbs .sep { color: var(--text-muted); }

.file-grid {
  display: grid;
  gap: 8px;
}

.file-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  transition: all var(--transition);
  text-decoration: none;
  color: inherit;
}
.file-item:hover {
  border-color: var(--border-hover);
  background: var(--bg-hover);
  transform: translateX(4px);
  box-shadow: var(--shadow-sm);
}

.file-icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  flex-shrink: 0;
}

.file-icon.dir { background: rgba(124, 141, 255, 0.15); color: var(--accent); }
.file-icon.pdf { background: rgba(248, 113, 113, 0.15); color: var(--accent-red); }
.file-icon.excel { background: rgba(74, 222, 128, 0.15); color: var(--accent-green); }
.file-icon.word { background: rgba(96, 165, 250, 0.15); color: #60a5fa; }
.file-icon.image { background: rgba(251, 191, 36, 0.15); color: var(--accent-amber); }
.file-icon.other { background: rgba(148, 153, 174, 0.15); color: var(--text-secondary); }

.file-info { flex: 1; min-width: 0; }
.file-info .file-name {
  font-weight: 500;
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.file-info .file-meta {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: 2px;
}

/* ============================================================
   SEARCH
   ============================================================ */

.search-results {
  display: grid;
  gap: 12px;
}

.search-result {
  padding: 16px 20px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  transition: all var(--transition);
}
.search-result:hover {
  border-color: var(--border-hover);
  box-shadow: var(--shadow-sm);
}

.search-result .result-title {
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 4px;
}

.search-result .result-folder {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-bottom: 8px;
}

.search-result .result-match {
  font-size: 0.82rem;
  color: var(--text-secondary);
  padding: 4px 0;
  border-left: 2px solid var(--accent);
  padding-left: 10px;
  margin-bottom: 4px;
}

.search-result .result-match mark {
  background: var(--accent-glow);
  color: var(--accent);
  padding: 1px 3px;
  border-radius: 2px;
}

/* ============================================================
   DASHBOARD CARDS
   ============================================================ */

.dashboard-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 16px;
  margin-bottom: 32px;
}

.dash-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 20px;
  transition: all var(--transition);
  cursor: pointer;
  text-decoration: none;
  color: inherit;
  display: block;
}
.dash-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.dash-card .card-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  margin-bottom: 14px;
}

.dash-card .card-title {
  font-weight: 600;
  margin-bottom: 4px;
  color: var(--text-primary);
}

.dash-card .card-count {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* ============================================================
   LOGIN
   ============================================================ */

.login-wrapper {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-primary);
  background-image: radial-gradient(ellipse at 50% 0%, rgba(124, 141, 255, 0.08) 0%, transparent 60%);
}

.login-card {
  width: 100%;
  max-width: 400px;
  background: var(--bg-glass);
  backdrop-filter: blur(20px);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: 40px;
  box-shadow: var(--shadow-lg);
}

.login-card h1 {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 4px;
  text-align: center;
}

.login-card .login-sub {
  text-align: center;
  color: var(--text-muted);
  font-size: 0.85rem;
  margin-bottom: 28px;
}

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

.form-group label {
  display: block;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: 6px;
}

.form-group input, .form-group select {
  width: 100%;
  padding: 10px 14px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-family: inherit;
  font-size: 0.9rem;
  outline: none;
  transition: all var(--transition);
}
.form-group input:focus, .form-group select:focus {
  border-color: var(--border-hover);
  box-shadow: var(--shadow-glow);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 20px;
  border: none;
  border-radius: var(--radius-md);
  font-family: inherit;
  font-size: 0.88rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition);
}

.btn-primary {
  background: var(--accent);
  color: #fff;
  width: 100%;
}
.btn-primary:hover {
  background: #6b7cef;
  box-shadow: var(--shadow-glow);
}

.btn-sm {
  padding: 6px 14px;
  font-size: 0.8rem;
}

.btn-danger {
  background: rgba(248, 113, 113, 0.15);
  color: var(--accent-red);
  border: 1px solid rgba(248, 113, 113, 0.2);
}
.btn-danger:hover { background: rgba(248, 113, 113, 0.25); }

.btn-secondary {
  background: var(--bg-tertiary);
  color: var(--text-secondary);
  border: 1px solid var(--border);
}
.btn-secondary:hover {
  background: var(--bg-hover);
  color: var(--text-primary);
}

.alert {
  padding: 10px 16px;
  border-radius: var(--radius-md);
  margin-bottom: 16px;
  font-size: 0.85rem;
}
.alert-error {
  background: rgba(248, 113, 113, 0.12);
  color: var(--accent-red);
  border: 1px solid rgba(248, 113, 113, 0.2);
}
.alert-success {
  background: rgba(74, 222, 128, 0.12);
  color: var(--accent-green);
  border: 1px solid rgba(74, 222, 128, 0.2);
}

/* ============================================================
   ADMIN
   ============================================================ */

.admin-table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 24px;
}

.admin-table th {
  text-align: left;
  padding: 10px 14px;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  border-bottom: 1px solid var(--border);
}

.admin-table td {
  padding: 12px 14px;
  border-bottom: 1px solid var(--border);
  font-size: 0.88rem;
  color: var(--text-secondary);
}

.admin-table tr:hover td { background: var(--bg-hover); }

.role-badge {
  display: inline-block;
  padding: 2px 10px;
  border-radius: 20px;
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.role-badge.admin {
  background: rgba(124, 141, 255, 0.15);
  color: var(--accent);
}
.role-badge.viewer {
  background: rgba(148, 153, 174, 0.15);
  color: var(--text-secondary);
}

.inline-form {
  display: flex;
  gap: 8px;
  align-items: center;
}
.inline-form input {
  padding: 5px 10px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-family: inherit;
  font-size: 0.82rem;
  width: 140px;
}

.create-user-form {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px;
  margin-bottom: 24px;
}

.create-user-form h3 {
  font-size: 1rem;
  margin-bottom: 16px;
}

.form-row {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}
.form-row .form-group { flex: 1; min-width: 160px; }

/* ============================================================
   PDF VIEWER
   ============================================================ */

.pdf-viewer {
  width: 100%;
  height: calc(100vh - var(--header-height) - 100px);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
}

/* ============================================================
   RESPONSIVE
   ============================================================ */

@media (max-width: 768px) {
  .sidebar {
    transform: translateX(-100%);
  }
  .sidebar.open {
    transform: translateX(0);
    box-shadow: var(--shadow-lg);
  }
  .main { margin-left: 0; }
  .header .menu-toggle { display: block; }
  .content, .content-wide { padding: 20px 16px; }
  .dashboard-grid { grid-template-columns: 1fr; }
  .form-row { flex-direction: column; }
}

@media (max-width: 480px) {
  .login-card { padding: 28px 20px; margin: 16px; }
  .header { padding: 0 16px; }
}