/* ==========================================================================
   LinkShortner - Clean, Classic Light SaaS Design System
   ========================================================================== */

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

:root {
  /* Colors */
  --primary: #2563eb;
  --primary-hover: #1d4ed8;
  --primary-light: #eff6ff;
  --primary-border: #bfdbfe;

  --bg-app: #f8fafc;
  --bg-surface: #ffffff;
  --bg-surface-elevated: #f1f5f9;
  --bg-input: #ffffff;
  
  --border-color: #e2e8f0;
  --border-hover: #cbd5e1;
  --border-focus: #2563eb;

  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #64748b;
  --text-light: #94a3b8;

  --success: #16a34a;
  --success-light: #f0fdf4;
  --success-border: #bbf7d0;

  --warning: #d97706;
  --warning-light: #fffbeb;
  --warning-border: #fde68a;

  --danger: #dc2626;
  --danger-hover: #b91c1c;
  --danger-light: #fef2f2;
  --danger-border: #fecaca;

  /* Shadows */
  --shadow-xs: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px -1px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.08), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -4px rgba(0, 0, 0, 0.04);

  /* Radius */
  --radius-sm: 6px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-full: 9999px;

  --font-sans: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
}

/* Dark mode fallback if user explicitly requests it */
[data-theme="dark"] {
  --primary: #3b82f6;
  --primary-hover: #60a5fa;
  --primary-light: #1e293b;
  --primary-border: #334155;

  --bg-app: #0f172a;
  --bg-surface: #1e293b;
  --bg-surface-elevated: #334155;
  --bg-input: #0f172a;
  
  --border-color: #334155;
  --border-hover: #475569;
  --border-focus: #3b82f6;

  --text-primary: #f8fafc;
  --text-secondary: #cbd5e1;
  --text-muted: #94a3b8;
  --text-light: #64748b;

  --shadow-xs: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
  --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.4);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.5);
}

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

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-app);
  color: var(--text-primary);
  line-height: 1.5;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  color: var(--text-primary);
  font-weight: 600;
  line-height: 1.25;
}

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

a:hover {
  text-decoration: underline;
}

/* Container */
.app-container {
  width: 100%;
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 1.25rem;
}

/* Navbar */
.navbar {
  background: var(--bg-surface);
  border-bottom: 1px solid var(--border-color);
  padding: 0.875rem 0;
  position: sticky;
  top: 0;
  z-index: 40;
}

.nav-wrapper {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand-logo {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  text-decoration: none !important;
}

.brand-logo i {
  color: var(--primary);
  font-size: 1.2rem;
}

.brand-logo-content {
  display: flex;
  flex-direction: column;
  line-height: 1.15;
}

.brand-title {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-primary);
}

.brand-subtitle {
  font-size: 0.6875rem;
  font-weight: 500;
  color: var(--text-muted);
  letter-spacing: 0.01em;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 0.625rem;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  font-family: var(--font-sans);
  font-size: 0.875rem;
  font-weight: 500;
  padding: 0.5rem 1rem;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  cursor: pointer;
  text-decoration: none !important;
  white-space: nowrap;
  transition: background-color 0.15s, border-color 0.15s, color 0.15s;
}

.btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

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

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

.btn-secondary {
  background-color: var(--bg-surface);
  border-color: var(--border-color);
  color: var(--text-primary) !important;
  box-shadow: var(--shadow-xs);
}

.btn-secondary:hover {
  background-color: var(--bg-surface-elevated);
  border-color: var(--border-hover);
}

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

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

.btn-ghost {
  background-color: transparent;
  color: var(--text-secondary) !important;
}

.btn-ghost:hover {
  background-color: var(--bg-surface-elevated);
  color: var(--text-primary) !important;
}

.btn-sm {
  padding: 0.375rem 0.625rem;
  font-size: 0.8125rem;
}

.btn-lg {
  padding: 0.75rem 1.25rem;
  font-size: 0.9375rem;
}

/* Theme Toggle Button */
.theme-toggle {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
}

.theme-toggle:hover {
  background: var(--bg-surface-elevated);
}

/* Cards */
.card {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-xs);
  padding: 1.25rem;
}

/* Stats Overview Cards */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.stat-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-xs);
}

.stat-label {
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--text-muted);
  margin-bottom: 0.375rem;
}

.stat-value {
  font-size: 1.625rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.1;
}

/* Form Controls */
.form-group {
  margin-bottom: 1rem;
}

.form-label {
  display: block;
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--text-primary);
  margin-bottom: 0.375rem;
}

.form-input, .form-select {
  width: 100%;
  font-family: var(--font-sans);
  font-size: 0.875rem;
  padding: 0.625rem 0.75rem;
  background-color: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  outline: none;
  transition: border-color 0.15s, box-shadow 0.15s;
}

.form-input:focus, .form-select:focus {
  border-color: var(--border-focus);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}

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

.input-wrapper {
  position: relative;
  display: flex;
  align-items: center;
}

.input-icon-left {
  position: absolute;
  left: 0.75rem;
  color: var(--text-muted);
  pointer-events: none;
  font-size: 0.875rem;
}

.input-icon-right {
  position: absolute;
  right: 0.75rem;
  color: var(--text-muted);
  font-size: 0.875rem;
}

.form-input.has-left-icon {
  padding-left: 2.25rem;
}

/* Input Group with Prefix Addon */
.input-group {
  display: flex;
  align-items: stretch;
  width: 100%;
}

.input-group-addon {
  display: inline-flex;
  align-items: center;
  padding: 0.5rem 0.75rem;
  font-size: 0.8125rem;
  font-family: var(--font-mono);
  color: var(--text-muted);
  background-color: var(--bg-surface-elevated);
  border: 1px solid var(--border-color);
  border-right: none;
  border-top-left-radius: var(--radius-sm);
  border-bottom-left-radius: var(--radius-sm);
  white-space: nowrap;
  user-select: none;
}

.input-group .form-input {
  border-top-left-radius: 0 !important;
  border-bottom-left-radius: 0 !important;
  flex: 1;
  min-width: 0;
}

.input-group:focus-within .input-group-addon {
  border-color: var(--border-focus);
}

/* Badges */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  padding: 0.2rem 0.5rem;
  font-size: 0.75rem;
  font-weight: 500;
  border-radius: var(--radius-sm);
  line-height: 1;
}

.badge-primary {
  background: var(--primary-light);
  color: var(--primary);
  border: 1px solid var(--primary-border);
}

.badge-success {
  background: var(--success-light);
  color: var(--success);
  border: 1px solid var(--success-border);
}

.badge-warning {
  background: var(--warning-light);
  color: var(--warning);
  border: 1px solid var(--warning-border);
}

.badge-neutral {
  background: var(--bg-surface-elevated);
  color: var(--text-secondary);
  border: 1px solid var(--border-color);
}

/* Monospace Pill */
.code-pill {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  background: var(--bg-surface-elevated);
  padding: 0.2rem 0.45rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-color);
  color: var(--primary);
  font-weight: 600;
}

/* Table */
.table-container {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-xs);
}

.table-responsive {
  width: 100%;
  overflow-x: auto;
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.875rem;
}

.data-table th {
  background: var(--bg-surface-elevated);
  padding: 0.75rem 1rem;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-muted);
  border-bottom: 1px solid var(--border-color);
  white-space: nowrap;
}

.data-table td {
  padding: 0.875rem 1rem;
  border-bottom: 1px solid var(--border-color);
  color: var(--text-primary);
  vertical-align: middle;
}

.data-table tbody tr:hover {
  background-color: #f8fafc;
}

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

/* Custom Checkbox */
.custom-checkbox {
  appearance: none;
  -webkit-appearance: none;
  width: 16px;
  height: 16px;
  border: 1.5px solid var(--border-color);
  border-radius: 4px;
  background: #ffffff;
  cursor: pointer;
  display: inline-grid;
  place-content: center;
  margin: 0;
}

.custom-checkbox:checked {
  background: var(--primary);
  border-color: var(--primary);
}

.custom-checkbox:checked::before {
  content: "✓";
  color: #ffffff;
  font-size: 11px;
  font-weight: 700;
}

/* Pagination */
.pagination {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 1rem;
  border-top: 1px solid var(--border-color);
  background: var(--bg-surface);
  flex-wrap: wrap;
  gap: 0.75rem;
}

.page-info {
  font-size: 0.8125rem;
  color: var(--text-muted);
}

.page-controls {
  display: flex;
  gap: 0.375rem;
}

/* Modals */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.4);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 50;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.15s ease-out;
  padding: 1rem;
}

.modal-backdrop.active {
  opacity: 1;
  pointer-events: auto;
}

.modal-dialog {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  width: 100%;
  max-width: 480px;
  overflow: hidden;
}

.modal-header {
  padding: 1rem 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--border-color);
}

.modal-title {
  font-size: 1rem;
  font-weight: 600;
}

.modal-close {
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-size: 1.1rem;
  cursor: pointer;
}

.modal-close:hover {
  color: var(--text-primary);
}

.modal-body {
  padding: 1.25rem;
}

.modal-footer {
  padding: 0.75rem 1.25rem;
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 0.5rem;
  background: var(--bg-surface-elevated);
  border-top: 1px solid var(--border-color);
}

/* Toast Notifications */
#toast-container {
  position: fixed;
  bottom: 1.25rem;
  right: 1.25rem;
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  max-width: 360px;
  pointer-events: none;
}

.toast {
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-md);
  padding: 0.75rem 1rem;
  display: flex;
  align-items: center;
  gap: 0.625rem;
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--text-primary);
  pointer-events: auto;
}

.toast-success { border-left: 3px solid var(--success); }
.toast-error { border-left: 3px solid var(--danger); }
.toast-info { border-left: 3px solid var(--primary); }

/* Landing Page Specifics */
.hero {
  padding: 4rem 0 3rem;
  text-align: center;
}

.hero h1 {
  font-size: 2.25rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text-primary);
  margin-bottom: 0.75rem;
}

.hero p {
  font-size: 1.05rem;
  color: var(--text-secondary);
  max-width: 540px;
  margin: 0 auto 2rem;
}

.shortener-box {
  max-width: 580px;
  margin: 0 auto 3rem;
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  box-shadow: var(--shadow-sm);
}

.features-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.25rem;
  margin-top: 3rem;
  text-align: left;
}

.feature-item {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.25rem;
}

.feature-item h3 {
  font-size: 0.95rem;
  margin-bottom: 0.35rem;
}

.feature-item p {
  font-size: 0.8125rem;
  color: var(--text-secondary);
  line-height: 1.45;
}

/* Footer */
.footer {
  border-top: 1px solid var(--border-color);
  padding: 1.5rem 0;
  margin-top: 4rem;
  text-align: center;
  font-size: 0.8125rem;
  color: var(--text-muted);
}

/* Status Toggle Switch */
.switch {
  position: relative;
  display: inline-block;
  width: 32px;
  height: 18px;
}

.switch input {
  opacity: 0;
  width: 0;
  height: 0;
}

.slider {
  position: absolute;
  cursor: pointer;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: #cbd5e1;
  transition: 0.2s;
  border-radius: 9999px;
}

.slider:before {
  position: absolute;
  content: "";
  height: 14px;
  width: 14px;
  left: 2px;
  bottom: 2px;
  background-color: #ffffff;
  transition: 0.2s;
  border-radius: 50%;
  box-shadow: 0 1px 2px rgba(0,0,0,0.15);
}

input:checked + .slider {
  background-color: var(--success);
}

input:checked + .slider:before {
  transform: translateX(14px);
}

/* Analytics Progress Bars */
.progress-bar-container {
  width: 100%;
  height: 6px;
  background: var(--bg-surface-elevated);
  border-radius: 9999px;
  overflow: hidden;
  margin-top: 4px;
}

.progress-bar-fill {
  height: 100%;
  background: var(--primary);
  border-radius: 9999px;
  transition: width 0.3s ease;
}