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

:root {
  --brand:       #2563eb;
  --brand-dark:  #1d4ed8;
  --brand-light: #eff6ff;
  --sidebar-bg:  #0f172a;
  --sidebar-fg:  #94a3b8;
  --sidebar-act: #ffffff;
  --bg:          #f1f5f9;
  --surface:     #ffffff;
  --border:      #e2e8f0;
  --text:        #1e293b;
  --text-muted:  #64748b;
  --danger:      #dc2626;
  --danger-bg:   #fef2f2;
  --success:     #16a34a;
  --success-bg:  #f0fdf4;
  --warning-bg:  #fffbeb;
  --warning:     #d97706;
  --radius:      8px;
  --shadow:      0 1px 3px rgb(0 0 0 / .1), 0 1px 2px rgb(0 0 0 / .06);
  --shadow-md:   0 4px 6px rgb(0 0 0 / .07), 0 2px 4px rgb(0 0 0 / .06);
  --sidebar-w:   240px;
  --topbar-h:    60px;
  --font:        -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

html { font-size: 16px; }
body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
}

a { color: var(--brand); text-decoration: none; }
a:hover { text-decoration: underline; }

code {
  font-family: 'SFMono-Regular', Consolas, 'Liberation Mono', Menlo, monospace;
  font-size: .875em;
  background: #f1f5f9;
  padding: 2px 5px;
  border-radius: 4px;
  color: #334155;
}

/* ============================================================
   Layout
   ============================================================ */
.layout {
  display: flex;
  min-height: 100vh;
}

/* ---- Sidebar ---- */
.sidebar {
  width: var(--sidebar-w);
  background: var(--sidebar-bg);
  color: var(--sidebar-fg);
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0; left: 0; bottom: 0;
  z-index: 100;
}

.sidebar-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 20px 20px 16px;
  border-bottom: 1px solid rgba(255,255,255,.06);
}

.brand-icon {
  width: 38px; height: 38px;
  background: var(--brand);
  border-radius: 10px;
  display: grid;
  place-items: center;
  font-size: 1.1rem;
  font-weight: 700;
  color: #fff;
  flex-shrink: 0;
}
.brand-icon.large {
  width: 52px; height: 52px;
  font-size: 1.6rem;
  border-radius: 14px;
}

.brand-text { display: flex; flex-direction: column; line-height: 1.2; }
.brand-name { color: #fff; font-weight: 700; font-size: 1rem; }
.brand-sub  { font-size: .75rem; color: var(--sidebar-fg); }

.sidebar-nav {
  flex: 1;
  padding: 12px 10px;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.nav-link {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 9px 12px;
  border-radius: 6px;
  color: var(--sidebar-fg);
  font-size: .9rem;
  transition: background .15s, color .15s;
}
.nav-link:hover, .nav-link.active {
  background: rgba(255,255,255,.08);
  color: var(--sidebar-act);
  text-decoration: none;
}
.nav-link.active { background: rgba(37,99,235,.3); color: #93c5fd; }

.sidebar-footer {
  padding: 14px 16px;
  border-top: 1px solid rgba(255,255,255,.06);
}
.sidebar-user { display: flex; align-items: center; gap: 10px; }

.user-avatar {
  width: 32px; height: 32px;
  background: var(--brand);
  border-radius: 50%;
  display: grid;
  place-items: center;
  font-weight: 700;
  font-size: .85rem;
  color: #fff;
  flex-shrink: 0;
}
.user-info { display: flex; flex-direction: column; line-height: 1.3; min-width: 0; }
.user-name  { font-size: .85rem; color: #fff; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.user-logout { font-size: .78rem; color: var(--sidebar-fg); }
.user-logout:hover { color: var(--danger); text-decoration: none; }

/* ---- Main ---- */
.main-wrapper {
  margin-left: var(--sidebar-w);
  flex: 1;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

.topbar {
  height: var(--topbar-h);
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  padding: 0 28px;
  position: sticky; top: 0; z-index: 50;
  box-shadow: var(--shadow);
}
.topbar-title { font-size: 1.05rem; font-weight: 600; color: var(--text); }

.content { padding: 28px; }

/* ============================================================
   Components
   ============================================================ */

/* Alerts */
.alert {
  padding: 12px 16px;
  border-radius: var(--radius);
  margin-bottom: 20px;
  font-size: .9rem;
  border-left: 4px solid transparent;
}
.alert-success { background: var(--success-bg); border-color: var(--success); color: #15803d; }
.alert-error   { background: var(--danger-bg);  border-color: var(--danger);  color: #b91c1c; }
.alert-warning { background: var(--warning-bg); border-color: var(--warning); color: #92400e; }
.alert ul { margin: 6px 0 0 18px; }

/* Badges */
.badge {
  display: inline-block;
  padding: 2px 9px;
  border-radius: 20px;
  font-size: .78rem;
  font-weight: 600;
}
.badge-success { background: #dcfce7; color: #15803d; }
.badge-neutral  { background: #f1f5f9; color: #64748b; }
.badge-danger   { background: #fee2e2; color: #b91c1c; }

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  border-radius: 6px;
  font-size: .875rem;
  font-weight: 500;
  border: 1px solid transparent;
  cursor: pointer;
  transition: background .15s, border-color .15s, opacity .15s;
  text-decoration: none !important;
  white-space: nowrap;
  line-height: 1.4;
}
.btn:disabled { opacity: .55; cursor: not-allowed; }

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

.btn-outline   { background: transparent; color: var(--text); border-color: var(--border); }
.btn-outline:hover { background: var(--bg); }

.btn-danger    { background: var(--danger); color: #fff; border-color: var(--danger); }
.btn-danger:hover { background: #b91c1c; }

.btn-sm { padding: 5px 10px; font-size: .8rem; }
.btn-block { width: 100%; justify-content: center; }

/* Page actions */
.page-actions {
  display: flex;
  gap: 10px;
  align-items: center;
  margin-bottom: 20px;
  flex-wrap: wrap;
}

/* Section info bar */
.section-info {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 10px 16px;
  margin-bottom: 20px;
  font-size: .875rem;
  display: flex;
  gap: 10px;
  align-items: center;
  flex-wrap: wrap;
}

/* Card */
.card {
  background: var(--surface);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  overflow: hidden;
}
.card-form { padding: 28px 32px; max-width: 760px; }

/* Table */
.table {
  width: 100%;
  border-collapse: collapse;
  font-size: .875rem;
}
.table th {
  text-align: left;
  padding: 12px 16px;
  background: var(--bg);
  border-bottom: 1px solid var(--border);
  font-weight: 600;
  color: var(--text-muted);
  font-size: .8rem;
  text-transform: uppercase;
  letter-spacing: .04em;
}
.table td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
  vertical-align: middle;
}
.table tr:last-child td { border-bottom: none; }
.table tr:hover td { background: #f8fafc; }
.text-center { text-align: center; }

/* Actions column */
.actions { white-space: nowrap; display: flex; gap: 6px; align-items: center; }

/* URL copy group */
.url-copy-group { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.url-text { font-size: .78rem; color: var(--text-muted); max-width: 260px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; display: inline-block; }

/* Empty state */
.empty-state {
  text-align: center;
  padding: 60px 20px;
  color: var(--text-muted);
  background: var(--surface);
  border: 1px dashed var(--border);
  border-radius: var(--radius);
}
.empty-state p { margin-bottom: 16px; }

/* Forms */
.form-group {
  margin-bottom: 20px;
}
.form-group label {
  display: block;
  font-weight: 500;
  margin-bottom: 6px;
  font-size: .875rem;
  color: var(--text);
}
.form-group label small {
  font-weight: 400;
  color: var(--text-muted);
  margin-left: 6px;
}
.form-group input[type="text"],
.form-group input[type="email"],
.form-group input[type="password"],
.form-group input[type="number"],
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 9px 12px;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: .9rem;
  font-family: var(--font);
  background: var(--surface);
  color: var(--text);
  transition: border-color .15s, box-shadow .15s;
  outline: none;
}
.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--brand);
  box-shadow: 0 0 0 3px rgba(37,99,235,.12);
}
.form-group textarea { resize: vertical; }
.form-group small { display: block; margin-top: 4px; font-size: .78rem; color: var(--text-muted); }
.form-check label { display: flex; align-items: center; gap: 8px; cursor: pointer; font-weight: 400; }
.form-check input[type="checkbox"] { width: 16px; height: 16px; cursor: pointer; }

.form-row { display: flex; gap: 20px; flex-wrap: wrap; }
.form-row .form-group.col-sm { flex: 1; min-width: 200px; }
.form-check-wrap { display: flex; align-items: center; }

.form-actions {
  display: flex;
  gap: 10px;
  padding-top: 8px;
  border-top: 1px solid var(--border);
  margin-top: 24px;
}

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

/* Slug preview */
.slug-preview {
  margin-top: 6px;
  font-size: .8rem;
  color: var(--text-muted);
}

/* Markdown editor tabs */
.editor-wrap { border: 1px solid var(--border); border-radius: 6px; overflow: hidden; }
.editor-tabs { display: flex; background: var(--bg); border-bottom: 1px solid var(--border); }
.tab-btn {
  padding: 7px 16px;
  border: none;
  background: transparent;
  cursor: pointer;
  font-size: .85rem;
  color: var(--text-muted);
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
}
.tab-btn.active { color: var(--brand); border-bottom-color: var(--brand); background: var(--surface); }
.markdown-editor {
  width: 100%;
  border: none !important;
  border-radius: 0 !important;
  box-shadow: none !important;
  font-family: 'SFMono-Regular', Consolas, monospace;
  font-size: .875rem;
  padding: 14px !important;
  resize: vertical;
  min-height: 300px;
}
.md-preview {
  padding: 14px 18px;
  min-height: 300px;
  font-size: .9rem;
  line-height: 1.7;
}
.md-preview h1, .md-preview h2, .md-preview h3 { margin: 1em 0 .4em; }
.md-preview p  { margin-bottom: .8em; }
.md-preview ul, .md-preview ol { padding-left: 1.4em; margin-bottom: .8em; }
.md-preview li { margin-bottom: .3em; }
.md-preview pre { background: #f1f5f9; padding: 10px 14px; border-radius: 6px; overflow-x: auto; margin-bottom: .8em; }
.md-preview blockquote { border-left: 3px solid var(--border); padding-left: 12px; color: var(--text-muted); margin-bottom: .8em; }
.hidden { display: none !important; }

/* ============================================================
   Login page
   ============================================================ */
.login-page {
  background: var(--bg);
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  padding: 20px;
}
.login-box {
  background: var(--surface);
  border-radius: 12px;
  box-shadow: var(--shadow-md);
  padding: 40px;
  width: 100%;
  max-width: 420px;
}
.login-brand {
  text-align: center;
  margin-bottom: 28px;
}
.login-brand .brand-icon { margin: 0 auto 12px; }
.login-brand h1 { font-size: 1.3rem; font-weight: 700; margin-bottom: 4px; }
.login-brand p  { color: var(--text-muted); font-size: .9rem; }

/* Modal overlay */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,.45);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 999;
  padding: 20px;
}
.modal-box {
  background: var(--surface);
  border-radius: 10px;
  padding: 28px 32px;
  max-width: 420px;
  width: 100%;
  box-shadow: 0 20px 60px rgba(0,0,0,.3);
  text-align: center;
}
.modal-box h3   { margin-bottom: 10px; font-size: 1.05rem; }
.modal-box p    { color: var(--text-muted); font-size: .9rem; margin-bottom: 20px; }
.modal-actions  { display: flex; gap: 10px; justify-content: center; }