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

/* ===== BASE ===== */
body {
  font-family: var(--font-body);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.7;
  font-size: 16px;
  transition: background 0.2s, color 0.2s;
}

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

.container {
  max-width: 720px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ===== HEADER ===== */
.site-header {
  border-bottom: 1px solid var(--border);
  padding: 16px 0;
}

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

.logo {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 18px;
  color: var(--text-primary);
}
.logo:hover { color: var(--accent); }

.nav-links {
  display: flex;
  align-items: center;
  gap: 24px;
}

.nav-links a {
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 500;
  color: var(--text-secondary);
}
.nav-links a:hover { color: var(--text-primary); }

.theme-toggle {
  background: none;
  border: none;
  cursor: pointer;
  font-size: 18px;
  padding: 4px;
  line-height: 1;
}

[data-theme="light"] .theme-icon-dark { display: none; }
[data-theme="dark"] .theme-icon-light { display: none; }

/* ===== HERO ===== */
.hero {
  background: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
  color: white;
  padding: 64px 0;
  margin: 0 -24px;
  padding-left: 24px;
  padding-right: 24px;
  border-radius: 0 0 12px 12px;
  margin-bottom: 48px;
}

.hero-tag {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--accent);
  letter-spacing: 2px;
  text-transform: uppercase;
  margin-bottom: 16px;
}

.hero h1 {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: clamp(28px, 5vw, 40px);
  line-height: 1.15;
  margin-bottom: 12px;
  color: white;
}

.hero p {
  font-size: 16px;
  color: #B0B8C8;
  line-height: 1.6;
  margin-bottom: 24px;
  max-width: 540px;
}

.hero-actions { display: flex; gap: 12px; flex-wrap: wrap; }

/* ===== BUTTONS ===== */
.btn {
  display: inline-block;
  padding: 10px 24px;
  border-radius: 6px;
  font-family: var(--font-heading);
  font-size: 14px;
  font-weight: 600;
  transition: all 0.15s;
}

.btn-primary {
  background: var(--accent);
  color: #1a1a2e;
}
.btn-primary:hover { background: var(--accent-hover); color: #1a1a2e; }

.btn-secondary {
  background: transparent;
  color: #B0B8C8;
  border: 1.5px solid #3a4a6e;
}
.btn-secondary:hover { border-color: #5a6a8e; color: white; }

/* On light pages, secondary btn uses text color */
.posts-section .btn-secondary,
.post .btn-secondary {
  color: var(--text-secondary);
  border-color: var(--border);
}

/* ===== POSTS LIST ===== */
.posts-section h2 {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 24px;
  margin-bottom: 24px;
}

.post-card {
  padding: 24px 0;
  border-bottom: 1px solid var(--border-subtle);
}
.post-card:last-child { border-bottom: none; }

.post-card h2 {
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 20px;
  margin-bottom: 6px;
}
.post-card h2 a { color: var(--text-primary); }
.post-card h2 a:hover { color: var(--accent); }

.post-meta {
  font-size: 13px;
  color: var(--text-tertiary);
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.post-description {
  font-size: 15px;
  color: var(--text-secondary);
  margin-bottom: 10px;
}

.post-tags { display: flex; gap: 6px; flex-wrap: wrap; }

.tag {
  font-family: var(--font-body);
  font-size: 11px;
  font-weight: 500;
  padding: 3px 10px;
  border-radius: 99px;
  background: var(--bg-tertiary);
  color: var(--text-secondary);
}

/* ===== ARTICLE ===== */
.post-header {
  padding: 48px 0 32px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 32px;
}

.post-header h1 {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: clamp(28px, 5vw, 36px);
  line-height: 1.2;
  margin-bottom: 8px;
}

/* ===== PROSE (article body) ===== */
.prose {
  font-size: 16px;
  line-height: 1.8;
  color: var(--text-secondary);
}

.prose h2 {
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 22px;
  color: var(--text-primary);
  margin: 40px 0 16px;
}

.prose h3 {
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 18px;
  color: var(--text-primary);
  margin: 32px 0 12px;
}

.prose p { margin-bottom: 16px; }

.prose ul, .prose ol {
  margin: 0 0 16px 24px;
}

.prose li { margin-bottom: 4px; }

.prose strong { color: var(--text-primary); }

.prose code {
  font-family: var(--font-mono);
  font-size: 14px;
  background: var(--code-bg);
  padding: 2px 6px;
  border-radius: 4px;
  border: 1px solid var(--code-border);
  color: var(--code-text);
}

.prose pre {
  background: var(--code-bg);
  border: 1px solid var(--code-border);
  border-radius: 8px;
  padding: 16px 20px;
  margin: 0 0 24px;
  overflow-x: auto;
  line-height: 1.6;
}

.prose pre code {
  background: none;
  border: none;
  padding: 0;
  font-size: 13px;
}

/* Callouts */
.callout {
  padding: 16px 20px;
  border-radius: 8px;
  margin: 0 0 24px;
  border-left: 3px solid;
  font-size: 14px;
  line-height: 1.6;
}

.callout-title {
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 4px;
}

.callout.danger { background: var(--danger-bg); border-color: var(--danger); }
.callout.danger .callout-title { color: var(--danger); }
.callout.warning { background: var(--warning-bg); border-color: var(--warning); }
.callout.warning .callout-title { color: var(--warning); }
.callout.success { background: var(--success-bg); border-color: var(--success); }
.callout.success .callout-title { color: var(--success); }
.callout.info { background: var(--info-bg); border-color: var(--info); }
.callout.info .callout-title { color: var(--info); }

/* Financial tables */
.prose table {
  width: 100%;
  border-collapse: collapse;
  margin: 0 0 24px;
  font-family: var(--font-mono);
  font-size: 13px;
  font-variant-numeric: tabular-nums;
}

.prose th {
  text-align: left;
  padding: 8px 12px;
  border-bottom: 2px solid var(--border);
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-tertiary);
}

.prose td {
  padding: 6px 12px;
  border-bottom: 1px solid var(--border-subtle);
}

.negative { color: var(--danger); }
.positive { color: var(--success); }

/* ===== FOOTER ===== */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 24px 0;
  margin-top: 64px;
  font-size: 13px;
  color: var(--text-tertiary);
}

.site-footer a { color: var(--text-secondary); }

/* ===== 404 ===== */
.error-page {
  text-align: center;
  padding: 80px 0;
}

.error-page h1 {
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 72px;
  color: var(--text-tertiary);
  margin-bottom: 16px;
}

.error-page p {
  font-size: 16px;
  color: var(--text-secondary);
  margin-bottom: 12px;
}

.error-page .error-detail {
  font-size: 13px;
  color: var(--text-tertiary);
  margin-bottom: 24px;
}

.error-page .btn-primary {
  margin-top: 8px;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 640px) {
  .container { padding: 0 16px; }
  .hero { padding: 40px 16px; margin: 0 -16px; }
  .nav-links { gap: 16px; }
}