/* ===========================
   Logic & Loops — Site Styles
   =========================== */

:root {
  --bg: #0f1115;
  --bg-alt: #161923;
  --surface: #1b1f2b;
  --text: #e7e9ee;
  --text-dim: #a3a9b7;
  --accent: #7c5cff;
  --accent-2: #35e0a1;
  --border: #2a2f3d;
  --code-bg: #10131a;
  --max-width: 880px;
  --radius: 10px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Segoe UI", system-ui, -apple-system, Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
}

code, pre, .logo-mark, .tag {
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
}

a {
  color: var(--accent-2);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

img {
  max-width: 100%;
}

/* Layout containers */
.wrap {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* Header / Nav */
.site-header {
  background: var(--bg-alt);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 10;
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 18px 24px;
}

.logo {
  display: flex;
  align-items: baseline;
  gap: 8px;
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text);
}

.logo-mark {
  color: var(--accent);
}

.nav-links {
  display: flex;
  gap: 24px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-links a {
  color: var(--text-dim);
  font-weight: 500;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--accent-2);
  text-decoration: none;
}

/* Hero */
.hero {
  padding: 72px 0 56px;
  border-bottom: 1px solid var(--border);
  background: radial-gradient(circle at 20% 20%, rgba(124,92,255,0.12), transparent 55%),
              radial-gradient(circle at 80% 0%, rgba(53,224,161,0.10), transparent 50%);
}

.hero h1 {
  font-size: 2.4rem;
  margin: 0 0 12px;
  line-height: 1.2;
}

.hero .accent {
  color: var(--accent-2);
}

.hero p {
  color: var(--text-dim);
  font-size: 1.1rem;
  max-width: 620px;
}

.hero-actions {
  margin-top: 28px;
  display: flex;
  gap: 14px;
}

.btn {
  display: inline-block;
  padding: 11px 20px;
  border-radius: 6px;
  font-weight: 600;
  border: 1px solid transparent;
}

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

.btn-primary:hover {
  background: #6a4be8;
  text-decoration: none;
}

.btn-ghost {
  border-color: var(--border);
  color: var(--text);
}

.btn-ghost:hover {
  border-color: var(--accent-2);
  text-decoration: none;
}

/* Section headings */
.section-title {
  font-size: 1.5rem;
  margin: 56px 0 24px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border);
}

/* Post cards */
.post-list {
  display: flex;
  flex-direction: column;
  gap: 20px;
  margin-bottom: 48px;
}

.post-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px 24px;
  transition: border-color 0.15s ease, transform 0.15s ease;
}

.post-card:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
}

.post-card h3 {
  margin: 0 0 8px;
  font-size: 1.2rem;
}

.post-card h3 a {
  color: var(--text);
}

.post-card h3 a:hover {
  color: var(--accent-2);
}

.post-meta {
  font-size: 0.85rem;
  color: var(--text-dim);
  margin-bottom: 10px;
}

.post-excerpt {
  color: var(--text-dim);
  margin: 0;
}

.tag {
  display: inline-block;
  font-size: 0.75rem;
  background: var(--code-bg);
  color: var(--accent-2);
  border: 1px solid var(--border);
  padding: 2px 8px;
  border-radius: 4px;
  margin-right: 6px;
}

/* Article page */
.article {
  padding: 48px 0 80px;
}

.article-header {
  margin-bottom: 32px;
}

.article-header h1 {
  font-size: 2rem;
  margin: 12px 0 8px;
}

.breadcrumb {
  font-size: 0.85rem;
  color: var(--text-dim);
}

.breadcrumb a {
  color: var(--text-dim);
}

.article-body h2 {
  margin-top: 40px;
  font-size: 1.4rem;
  color: var(--accent-2);
}

.article-body h3 {
  margin-top: 28px;
  font-size: 1.15rem;
}

.article-body p,
.article-body li {
  color: #d7dae1;
}

.article-body pre {
  background: var(--code-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px 18px;
  overflow-x: auto;
  margin: 20px 0;
}

.article-body code {
  background: var(--code-bg);
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 0.92em;
}

.article-body pre code {
  padding: 0;
  background: none;
}

table.truth-table {
  border-collapse: collapse;
  width: 100%;
  margin: 20px 0;
}

table.truth-table th,
table.truth-table td {
  border: 1px solid var(--border);
  padding: 8px 14px;
  text-align: center;
}

table.truth-table th {
  background: var(--surface);
  color: var(--accent-2);
}

.callout {
  background: var(--surface);
  border-left: 3px solid var(--accent);
  padding: 14px 18px;
  border-radius: 6px;
  margin: 24px 0;
  color: var(--text-dim);
}

.post-nav {
  display: flex;
  justify-content: space-between;
  margin-top: 48px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
}

/* About page */
.about-content h2 {
  color: var(--accent-2);
  margin-top: 32px;
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--border);
  background: var(--bg-alt);
  padding: 36px 0;
  margin-top: 40px;
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 16px;
  align-items: center;
  color: var(--text-dim);
  font-size: 0.9rem;
}

.footer-links {
  display: flex;
  gap: 18px;
  list-style: none;
  padding: 0;
  margin: 0;
}

.footer-links a {
  color: var(--text-dim);
}

.footer-links a:hover {
  color: var(--accent-2);
}

@media (max-width: 640px) {
  .nav {
    flex-direction: column;
    gap: 12px;
  }
  .hero h1 {
    font-size: 1.9rem;
  }
  .footer-inner {
    flex-direction: column;
    text-align: center;
  }
}