:root {
  --bg: #0a0a0f;
  --surface: #12121a;
  --surface-hover: #1a1a25;
  --border: #2a2a3a;
  --text: #e4e4ef;
  --text-dim: #8888a0;
  --accent: #6c63ff;
  --accent-dim: #4a43b0;
  --green: #34d399;
  --yellow: #fbbf24;
  --red: #f87171;
  --radius: 12px;
  --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --mono: 'JetBrains Mono', 'Fira Code', 'Cascadia Code', monospace;
}

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

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

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* Header */
header {
  padding: 48px 0 32px;
  text-align: center;
  border-bottom: 1px solid var(--border);
}

header h1 {
  font-size: 2.5rem;
  font-weight: 800;
  letter-spacing: -0.02em;
}

.logo {
  color: var(--accent);
  font-family: var(--mono);
}

.tagline {
  color: var(--text-dim);
  font-size: 1.1rem;
  margin-top: 8px;
}

.updated {
  color: var(--text-dim);
  font-size: 0.85rem;
  margin-top: 4px;
  opacity: 0.7;
}

/* Cards */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
  margin-top: 32px;
}

.card h2 {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.section-desc {
  color: var(--text-dim);
  margin-bottom: 24px;
  font-size: 0.95rem;
}

/* Calculator */
.calc-grid {
  display: flex;
  gap: 24px;
  margin-bottom: 24px;
  flex-wrap: wrap;
}

.calc-input {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.calc-input label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.calc-input input,
.calc-input select {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  font-size: 1rem;
  padding: 10px 14px;
  font-family: var(--font);
  min-width: 160px;
}

.calc-input input:focus,
.calc-input select:focus {
  outline: none;
  border-color: var(--accent);
}

.calc-results {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 16px;
}

.calc-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 16px;
  transition: border-color 0.2s;
}

.calc-card:hover {
  border-color: var(--accent-dim);
}

.calc-card .tool-name {
  font-weight: 700;
  font-size: 0.95rem;
  margin-bottom: 4px;
}

.calc-card .tool-tier {
  font-size: 0.8rem;
  color: var(--text-dim);
  margin-bottom: 8px;
}

.calc-card .price {
  font-size: 1.4rem;
  font-weight: 800;
  font-family: var(--mono);
  color: var(--green);
}

.calc-card .price-period {
  font-size: 0.8rem;
  color: var(--text-dim);
  font-weight: 400;
}

.calc-card.cheapest {
  border-color: var(--green);
  background: rgba(52, 211, 153, 0.05);
}

.calc-card.cheapest::after {
  content: 'Best Value';
  display: block;
  margin-top: 8px;
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--green);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* Comparison Table */
.table-wrap {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}

th {
  text-align: left;
  padding: 12px 16px;
  font-weight: 700;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-dim);
  border-bottom: 2px solid var(--border);
  white-space: nowrap;
}

th.sortable {
  cursor: pointer;
  user-select: none;
}

th.sortable:hover {
  color: var(--accent);
}

th.sorted-asc::after { content: ' ▲'; color: var(--accent); }
th.sorted-desc::after { content: ' ▼'; color: var(--accent); }

td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
}

tr:hover td {
  background: var(--surface-hover);
}

.check { color: var(--green); font-weight: bold; }
.cross { color: var(--red); opacity: 0.5; }
.partial { color: var(--yellow); }

.price-cell {
  font-family: var(--mono);
  font-weight: 600;
}

.free-badge {
  display: inline-block;
  background: rgba(52, 211, 153, 0.15);
  color: var(--green);
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 0.8rem;
  font-weight: 700;
}

/* Detail Cards */
.detail-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
  gap: 20px;
}

.detail-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 24px;
  transition: border-color 0.2s;
}

.detail-card:hover {
  border-color: var(--accent-dim);
}

.detail-card h3 {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 4px;
}

.detail-card .vendor {
  font-size: 0.85rem;
  color: var(--text-dim);
  margin-bottom: 16px;
}

.detail-card .tier-list {
  list-style: none;
  margin-bottom: 16px;
}

.detail-card .tier-list li {
  padding: 8px 0;
  border-bottom: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
}

.detail-card .tier-list li:last-child {
  border-bottom: none;
}

.tier-name {
  font-weight: 600;
}

.tier-price {
  font-family: var(--mono);
  color: var(--accent);
  font-weight: 600;
}

.detail-card .features {
  list-style: none;
  font-size: 0.85rem;
  color: var(--text-dim);
}

.detail-card .features li {
  padding: 3px 0;
}

.detail-card .features li::before {
  content: '→ ';
  color: var(--accent);
}

.detail-card .link-out {
  display: inline-block;
  margin-top: 12px;
  color: var(--accent);
  text-decoration: none;
  font-size: 0.85rem;
  font-weight: 600;
}

.detail-card .link-out:hover {
  text-decoration: underline;
}

/* FAQ */
.faq-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

details {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
}

summary {
  padding: 16px;
  cursor: pointer;
  font-weight: 600;
  font-size: 0.95rem;
  list-style: none;
}

summary::-webkit-details-marker { display: none; }

summary::before {
  content: '+';
  display: inline-block;
  width: 20px;
  font-family: var(--mono);
  color: var(--accent);
  font-weight: 700;
}

details[open] summary::before {
  content: '−';
}

details p {
  padding: 0 16px 16px;
  color: var(--text-dim);
  font-size: 0.9rem;
  line-height: 1.7;
}

/* Footer */
footer {
  margin-top: 48px;
  padding: 32px 0;
  border-top: 1px solid var(--border);
  text-align: center;
}

footer p {
  color: var(--text-dim);
  font-size: 0.85rem;
}

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

footer a:hover {
  text-decoration: underline;
}

/* Navigation */
nav {
  display: flex;
  gap: 24px;
  justify-content: center;
  margin-top: 16px;
}

nav a {
  color: var(--text-dim);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 600;
  padding: 4px 0;
  border-bottom: 2px solid transparent;
  transition: color 0.2s, border-color 0.2s;
}

nav a:hover,
nav a.active {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

/* Blog */
.blog-list {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.blog-post-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 24px;
  transition: border-color 0.2s;
  text-decoration: none;
  color: inherit;
  display: block;
}

.blog-post-card:hover {
  border-color: var(--accent-dim);
}

.blog-post-card h3 {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--text);
}

.blog-post-card .blog-meta {
  font-size: 0.8rem;
  color: var(--text-dim);
  margin-bottom: 12px;
  display: flex;
  gap: 16px;
}

.blog-post-card .blog-excerpt {
  font-size: 0.9rem;
  color: var(--text-dim);
  line-height: 1.6;
}

.blog-post-card .read-more {
  display: inline-block;
  margin-top: 12px;
  color: var(--accent);
  font-size: 0.85rem;
  font-weight: 600;
}

/* Blog Article */
.article-meta {
  font-size: 0.85rem;
  color: var(--text-dim);
  margin-bottom: 24px;
  display: flex;
  gap: 16px;
}

.article-content h2 {
  font-size: 1.3rem;
  margin-top: 32px;
  margin-bottom: 12px;
}

.article-content h3 {
  font-size: 1.1rem;
  margin-top: 24px;
  margin-bottom: 8px;
}

.article-content p {
  color: var(--text-dim);
  font-size: 0.95rem;
  line-height: 1.8;
  margin-bottom: 16px;
}

.article-content ul,
.article-content ol {
  color: var(--text-dim);
  font-size: 0.95rem;
  line-height: 1.8;
  margin-bottom: 16px;
  padding-left: 24px;
}

.article-content li {
  margin-bottom: 6px;
}

.article-content strong {
  color: var(--text);
}

.article-content code {
  font-family: var(--mono);
  background: var(--bg);
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 0.85em;
}

.article-content blockquote {
  border-left: 3px solid var(--accent);
  padding: 12px 20px;
  margin: 20px 0;
  background: rgba(108, 99, 255, 0.05);
  border-radius: 0 8px 8px 0;
}

.article-content blockquote p {
  margin-bottom: 0;
}

.callout {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 20px;
  margin: 20px 0;
}

.callout.warning {
  border-color: var(--yellow);
  background: rgba(251, 191, 36, 0.05);
}

.callout.tip {
  border-color: var(--green);
  background: rgba(52, 211, 153, 0.05);
}

.callout-title {
  font-weight: 700;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 8px;
}

.callout.warning .callout-title { color: var(--yellow); }
.callout.tip .callout-title { color: var(--green); }

.article-cta {
  background: var(--bg);
  border: 1px solid var(--accent-dim);
  border-radius: 8px;
  padding: 24px;
  margin-top: 32px;
  text-align: center;
}

.article-cta p {
  color: var(--text);
  margin-bottom: 12px;
}

.article-cta a {
  display: inline-block;
  background: var(--accent);
  color: white;
  padding: 10px 24px;
  border-radius: 8px;
  text-decoration: none;
  font-weight: 700;
  font-size: 0.9rem;
  transition: background 0.2s;
}

.article-cta a:hover {
  background: var(--accent-dim);
}

/* Responsive */
@media (max-width: 768px) {
  header h1 { font-size: 1.75rem; }
  .card { padding: 20px; }
  .detail-grid { grid-template-columns: 1fr; }
  .calc-results { grid-template-columns: 1fr; }
}

@media (max-width: 480px) {
  .container { padding: 0 16px; }
  header { padding: 32px 0 24px; }
  td, th { padding: 8px 10px; font-size: 0.8rem; }
}