/* Central Design Tokens and CSS Reset */
:root {
  --primary: #2563eb;
  --primary-hover: #1d4ed8;
  --primary-light: #eff6ff;
  --primary-focus: rgba(37, 99, 235, 0.25);

  --slate-50: #f8fafc;
  --slate-100: #f1f5f9;
  --slate-200: #e2e8f0;
  --slate-300: #cbd5e1;
  --slate-400: #94a3b8;
  --slate-500: #64748b;
  --slate-600: #475569;
  --slate-700: #334155;
  --slate-800: #1e293b;
  --slate-900: #0f172a;

  --success: #10b981;
  --success-light: #ecfdf5;
  --warning: #f59e0b;
  --warning-light: #fffbeb;
  --danger: #ef4444;
  --danger-light: #fef2f2;

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-full: 9999px;

  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);

  --font-sans: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
}

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

html, body {
  width: 100%;
  max-width: 100%;
  overflow-x: hidden;
}

body {
  font-family: var(--font-sans);
  background-color: var(--slate-50);
  color: var(--slate-800);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
}

a {
  color: var(--primary);
  text-decoration: none;
}

button, input, select, textarea {
  font: inherit;
  max-width: 100%;
}

/* App Shell Layout */
#app {
  display: flex;
  min-height: 100vh;
  width: 100%;
  max-width: 100%;
  overflow-x: hidden;
}

.sidebar {
  width: 260px;
  background-color: #ffffff;
  border-right: 1px solid var(--slate-200);
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
  position: sticky;
  top: 0;
  height: 100vh;
  z-index: 50;
}

.brand-header {
  padding: 20px;
  display: flex;
  align-items: center;
  gap: 12px;
  border-bottom: 1px solid var(--slate-200);
}

.brand-logo {
  width: 36px;
  height: 36px;
  background: var(--primary);
  color: #ffffff;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 18px;
  flex-shrink: 0;
}

.brand-text {
  min-width: 0;
}

.brand-text h1 {
  font-size: 15px;
  font-weight: 700;
  color: var(--slate-900);
  line-height: 1.2;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.brand-text span {
  font-size: 11px;
  color: var(--slate-500);
  font-weight: 500;
}

.sidebar-nav {
  padding: 16px 12px;
  display: flex;
  flex-direction: column;
  gap: 4px;
  flex: 1;
  overflow-y: auto;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  color: var(--slate-600);
  font-weight: 500;
  font-size: 14px;
  transition: all 0.15s ease;
  white-space: nowrap;
}

.nav-item:hover {
  background-color: var(--slate-100);
  color: var(--slate-900);
}

.nav-item.active {
  background-color: var(--primary-light);
  color: var(--primary);
  font-weight: 600;
}

.nav-item svg {
  width: 18px;
  height: 18px;
  fill: currentColor;
  flex-shrink: 0;
}

.sidebar-footer {
  padding: 16px;
  border-top: 1px solid var(--slate-200);
  font-size: 12px;
  color: var(--slate-500);
}

.main-content {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
  width: 100%;
}

.top-bar {
  min-height: 64px;
  background-color: #ffffff;
  border-bottom: 1px solid var(--slate-200);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 32px;
  gap: 16px;
  flex-wrap: wrap;
}

.page-title {
  font-size: 18px;
  font-weight: 600;
  color: var(--slate-900);
  min-width: 0;
  word-break: break-word;
}

.content-body {
  padding: 32px;
  flex: 1;
  min-width: 0;
  width: 100%;
}

/* Common UI Components */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  font-size: 13.5px;
  font-weight: 500;
  cursor: pointer;
  border: 1px solid transparent;
  transition: all 0.15s ease;
  white-space: nowrap;
  max-width: 100%;
}

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

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

.btn-secondary {
  background-color: #ffffff;
  border-color: var(--slate-300);
  color: var(--slate-700);
}

.btn-secondary:hover {
  background-color: var(--slate-50);
  border-color: var(--slate-400);
}

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

.btn-danger:hover {
  background-color: #dc2626;
}

.badge {
  display: inline-flex;
  align-items: center;
  padding: 2px 8px;
  border-radius: var(--radius-full);
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  white-space: nowrap;
}

.badge-published {
  background-color: var(--success-light);
  color: var(--success);
}

.badge-draft {
  background-color: var(--slate-100);
  color: var(--slate-600);
}

.card {
  background: #ffffff;
  border: 1px solid var(--slate-200);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  padding: 24px;
  min-width: 0;
  max-width: 100%;
}

/* Toast Notifications */
#toast-container {
  position: fixed;
  bottom: 24px;
  right: 24px;
  max-width: calc(100vw - 32px);
  display: flex;
  flex-direction: column;
  gap: 8px;
  z-index: 99999;
  pointer-events: none;
}

.toast {
  background: #ffffff;
  border: 1px solid var(--slate-200);
  box-shadow: var(--shadow-lg);
  border-radius: var(--radius-md);
  padding: 12px 18px;
  font-size: 13.5px;
  display: flex;
  align-items: center;
  gap: 10px;
  animation: toastIn 0.2s ease-out;
  pointer-events: auto;
  word-break: break-word;
}

.toast.toast-success { border-left: 4px solid var(--success); }
.toast.toast-error { border-left: 4px solid var(--danger); }
.toast.toast-info { border-left: 4px solid var(--primary); }

@keyframes toastIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}