/* ============================================
   SEO Gap Finder — Dark Analytics Dashboard
   Colors: #0f172a (navy), #38bdf8 (sky), #f59e0b (amber)
   ============================================ */

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

:root {
  --bg-primary: #0f172a;
  --bg-secondary: #1e293b;
  --bg-card: #1e293b;
  --bg-card-hover: #253349;
  --bg-input: #0f172a;
  --border: #334155;
  --border-focus: #38bdf8;
  --text-primary: #f1f5f9;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --accent: #38bdf8;
  --accent-hover: #7dd3fc;
  --accent-glow: rgba(56, 189, 248, 0.15);
  --warning: #f59e0b;
  --warning-bg: rgba(245, 158, 11, 0.1);
  --success: #22c55e;
  --danger: #ef4444;
  --danger-bg: rgba(239, 68, 68, 0.1);
  --radius: 12px;
  --radius-sm: 8px;
  --shadow: 0 4px 24px rgba(0,0,0,0.3);
  --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', 'Cascadia Code', monospace;
}

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
}

a {
  color: var(--accent);
  text-decoration: none;
  transition: color 0.2s;
}
a:hover {
  color: var(--accent-hover);
}

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

/* Sidebar */
.sidebar {
  width: 300px;
  min-width: 300px;
  background: var(--bg-secondary);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  height: 100vh;
  position: sticky;
  top: 0;
  overflow-y: auto;
  transition: transform 0.3s ease;
  z-index: 100;
}

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

.sidebar-header h3 {
  font-size: 0.875rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-secondary);
  font-weight: 600;
}

.sidebar-header .sidebar-toggle {
  display: none;
}

.sidebar-toggle {
  background: none;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  font-size: 1.25rem;
  padding: 4px 8px;
  border-radius: var(--radius-sm);
  transition: background 0.2s, color 0.2s;
}

.sidebar-toggle:hover {
  background: var(--bg-card-hover);
  color: var(--text-primary);
}

.history-list {
  padding: 12px;
  flex: 1;
  overflow-y: auto;
}

.history-empty {
  color: var(--text-muted);
  font-size: 0.8125rem;
  text-align: center;
  padding: 24px 12px;
}

.history-item {
  padding: 12px 14px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: background 0.2s;
  margin-bottom: 4px;
  border: 1px solid transparent;
}

.history-item:hover {
  background: var(--bg-card-hover);
  border-color: var(--border);
}

.history-item-url {
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  margin-bottom: 4px;
}

.history-item-meta {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.75rem;
  color: var(--text-muted);
}

.history-item-score {
  font-weight: 600;
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 0.6875rem;
}

.score-high { background: rgba(34, 197, 94, 0.15); color: #22c55e; }
.score-mid { background: var(--warning-bg); color: var(--warning); }
.score-low { background: var(--danger-bg); color: var(--danger); }

/* Main Content */
.main-content {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
}

/* Header */
.app-header {
  padding: 16px 32px;
  border-bottom: 1px solid var(--border);
  background: var(--bg-secondary);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

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

.header-left > .sidebar-toggle {
  display: none;
}

.brand-name {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.01em;
}

.brand-tag {
  font-size: 0.75rem;
  color: var(--text-muted);
  font-weight: 400;
  margin-left: 12px;
}

/* Input Section */
.input-section {
  padding: 32px 32px 16px;
}

.analyze-form {
  max-width: 800px;
}

.input-wrapper {
  display: flex;
  align-items: center;
  background: var(--bg-secondary);
  border: 2px solid var(--border);
  border-radius: var(--radius);
  padding: 6px 6px 6px 16px;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.input-wrapper:focus-within {
  border-color: var(--accent);
  box-shadow: 0 0 0 4px var(--accent-glow);
}

.input-icon {
  color: var(--text-muted);
  flex-shrink: 0;
  margin-right: 12px;
}

.input-wrapper input[type="url"] {
  flex: 1;
  background: none;
  border: none;
  outline: none;
  color: var(--text-primary);
  font-size: 1rem;
  font-family: var(--font);
  padding: 10px 0;
  min-width: 0;
}

.input-wrapper input[type="url"]::placeholder {
  color: var(--text-muted);
}

.input-hint {
  margin-top: 10px;
  font-size: 0.8125rem;
  color: var(--text-muted);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  font-family: var(--font);
  font-weight: 600;
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all 0.2s;
  white-space: nowrap;
}

.btn-primary {
  background: var(--accent);
  color: var(--bg-primary);
  padding: 12px 28px;
  font-size: 0.9375rem;
}

.btn-primary:hover {
  background: var(--accent-hover);
  transform: translateY(-1px);
}

.btn-primary:active {
  transform: translateY(0);
}

.btn-primary:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
}

.btn-small {
  padding: 8px 16px;
  font-size: 0.8125rem;
}

.btn-outline {
  background: transparent;
  color: var(--accent);
  border: 1px solid var(--accent);
  padding: 7px 15px;
  font-size: 0.8125rem;
}

.btn-outline:hover {
  background: var(--accent-glow);
}

.spinner {
  animation: spin 1s linear infinite;
}

@keyframes spin {
  100% { transform: rotate(360deg); }
}

/* Error Banner */
.error-banner {
  margin: 0 32px;
  padding: 12px 16px;
  background: var(--danger-bg);
  border: 1px solid var(--danger);
  border-radius: var(--radius-sm);
  color: var(--danger);
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.875rem;
}

.error-icon {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--danger);
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.75rem;
  flex-shrink: 0;
}

.error-close {
  margin-left: auto;
  background: none;
  border: none;
  color: var(--danger);
  cursor: pointer;
  font-size: 1.25rem;
  padding: 0 4px;
}

/* Results Section */
.results-section {
  padding: 0 32px 32px;
}

/* Cards */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  margin-bottom: 20px;
}

.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}

.card-title {
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: 16px;
}

.card-header .card-title {
  margin-bottom: 0;
}

/* Top Row: Score + Chart */
.results-top-row {
  display: grid;
  grid-template-columns: 320px 1fr;
  gap: 20px;
  margin-bottom: 0;
}

/* Score Gauge */
.score-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.score-gauge {
  position: relative;
  width: 200px;
  height: 120px;
  margin: 8px 0 12px;
}

.gauge-svg {
  width: 100%;
  height: 100%;
}

.gauge-value {
  position: absolute;
  bottom: 8px;
  left: 50%;
  transform: translateX(-50%);
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--text-primary);
  font-variant-numeric: tabular-nums;
}

.gauge-label {
  font-size: 0.8125rem;
  color: var(--text-muted);
  margin-bottom: 8px;
}

.analyzed-url {
  font-size: 0.75rem;
  color: var(--text-muted);
  word-break: break-all;
  max-width: 100%;
  font-family: var(--font-mono);
}

/* Chart */
.chart-card {
  display: flex;
  flex-direction: column;
}

.chart-container {
  flex: 1;
  position: relative;
  min-height: 200px;
}

/* Data Table */
.table-wrapper {
  overflow-x: auto;
}

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

.data-table thead th {
  text-align: left;
  padding: 10px 14px;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  border-bottom: 1px solid var(--border);
}

.data-table tbody td {
  padding: 12px 14px;
  border-bottom: 1px solid rgba(51, 65, 85, 0.5);
  color: var(--text-primary);
}

.data-table tbody tr:hover {
  background: var(--bg-card-hover);
}

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

/* Badges */
.badge {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 4px;
  font-size: 0.6875rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.badge-high { background: rgba(34, 197, 94, 0.15); color: #22c55e; }
.badge-medium { background: var(--warning-bg); color: var(--warning); }
.badge-low { background: var(--danger-bg); color: var(--danger); }
.badge-none { background: rgba(100, 116, 139, 0.2); color: var(--text-muted); }

/* Competitor Grid */
.competitor-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 16px;
}

.competitor-card {
  background: var(--bg-primary);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 18px;
}

.competitor-url {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--accent);
  margin-bottom: 8px;
  word-break: break-all;
}

.competitor-score {
  font-size: 1.5rem;
  font-weight: 800;
  margin-bottom: 10px;
}

.competitor-strengths {
  list-style: none;
  padding: 0;
}

.competitor-strengths li {
  font-size: 0.8125rem;
  color: var(--text-secondary);
  padding: 3px 0;
  padding-left: 16px;
  position: relative;
}

.competitor-strengths li::before {
  content: "+";
  position: absolute;
  left: 0;
  color: var(--success);
  font-weight: 700;
}

/* Fixes List */
.fix-item {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 14px 0;
  border-bottom: 1px solid rgba(51, 65, 85, 0.5);
}

.fix-item:last-child {
  border-bottom: none;
}

.fix-priority {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.8125rem;
  font-weight: 800;
  flex-shrink: 0;
  background: var(--accent-glow);
  color: var(--accent);
  border: 1px solid var(--accent);
}

.fix-content {
  flex: 1;
}

.fix-text {
  font-size: 0.9375rem;
  color: var(--text-primary);
  margin-bottom: 6px;
}

.fix-badges {
  display: flex;
  gap: 8px;
}

/* Category Details */
.category-detail {
  margin-bottom: 16px;
}

.category-detail:last-child {
  margin-bottom: 0;
}

.category-detail-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 8px;
}

.category-detail-name {
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--text-primary);
}

.category-detail-score {
  font-size: 0.875rem;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}

.category-issues {
  list-style: none;
  padding: 0;
}

.category-issues li {
  font-size: 0.8125rem;
  color: var(--text-secondary);
  padding: 4px 0 4px 20px;
  position: relative;
}

.category-issues li::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 11px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--warning);
}

/* Footer */
.app-footer {
  margin-top: auto;
  padding: 32px;
  border-top: 1px solid var(--border);
  text-align: center;
}

.footer-signup {
  max-width: 420px;
  margin: 0 auto 16px;
}

.footer-signup p {
  font-size: 0.875rem;
  color: var(--text-secondary);
  margin-bottom: 12px;
}

.subscribe-form {
  display: flex;
  gap: 8px;
  justify-content: center;
}

.subscribe-form input[type="email"] {
  padding: 8px 14px;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-family: var(--font);
  font-size: 0.875rem;
  outline: none;
  width: 240px;
  transition: border-color 0.2s;
}

.subscribe-form input[type="email"]:focus {
  border-color: var(--accent);
}

.subscribe-form input[type="email"]::placeholder {
  color: var(--text-muted);
}

.subscribe-status {
  font-size: 0.8125rem;
  margin-top: 8px;
  min-height: 1.2em;
}

.subscribe-status.success {
  color: var(--success);
}

.subscribe-status.error {
  color: var(--danger);
}

.footer-copy {
  font-size: 0.75rem;
  color: var(--text-muted);
}

/* Responsive */
@media (max-width: 1024px) {
  .results-top-row {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .sidebar {
    position: fixed;
    top: 0;
    left: 0;
    height: 100vh;
    transform: translateX(-100%);
  }

  .sidebar.open {
    transform: translateX(0);
    box-shadow: 4px 0 24px rgba(0,0,0,0.5);
  }

  .sidebar-header .sidebar-toggle {
    display: block;
  }

  .header-left > .sidebar-toggle {
    display: block;
  }

  .input-section,
  .results-section {
    padding-left: 16px;
    padding-right: 16px;
  }

  .app-header {
    padding: 14px 16px;
  }

  .brand-tag {
    display: none;
  }

  .input-wrapper {
    flex-wrap: wrap;
  }

  .input-wrapper input[type="url"] {
    font-size: 0.9375rem;
  }

  .input-wrapper .btn-primary {
    width: 100%;
    margin-top: 4px;
  }

  .competitor-grid {
    grid-template-columns: 1fr;
  }

  .app-footer {
    padding: 24px 16px;
  }

  .subscribe-form {
    flex-direction: column;
    align-items: center;
  }

  .subscribe-form input[type="email"] {
    width: 100%;
  }
}

/* Skeleton loading state */
.skeleton {
  background: linear-gradient(90deg, var(--bg-secondary) 25%, var(--bg-card-hover) 50%, var(--bg-secondary) 75%);
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
  border-radius: var(--radius-sm);
}

@keyframes shimmer {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

/* Scroll bar styling */
::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: var(--bg-primary);
}

::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--text-muted);
}