/* ==========================================================================
   Terminal Theme
   A dark terminal-inspired theme for Jekyll.
   No framework dependencies — just modern CSS.
   ========================================================================== */

/* ---------- Design Tokens ---------- */
:root {
  --bg-primary: #1a1a2e;
  --bg-deep: #12122a;
  --bg-elevated: rgba(0, 0, 0, 0.25);
  --bg-surface: rgba(0, 0, 0, 0.2);
  --bg-hover: rgba(255, 255, 255, 0.06);
  --bg-hover-strong: rgba(255, 255, 255, 0.12);

  --text-primary: #d0d0d0;
  --text-secondary: #999;
  --text-muted: #888;
  --text-faint: #666;
  --text-heading: #e8e8e8;
  --text-bright: #f0f0f0;

  --link-color: #6cb4e8;
  --link-hover: #a0d4f5;
  --accent-blue: rgba(100, 180, 232, 0.4);
  --border-subtle: rgba(255, 255, 255, 0.06);
  --border-accent: rgba(100, 140, 200, 0.1);
  --border-light: rgba(255, 255, 255, 0.1);

  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-heading: 'Space Mono', 'Courier New', monospace;
  --font-code: 'Fira Code', 'Consolas', 'Monaco', monospace;

  --radius-sm: 3px;
  --radius-md: 4px;
  --radius-lg: 6px;

  --content-width: 960px;
  --sidebar-width: 260px;
  --gap: 40px;
}


/* ==========================================================================
   Reset & Base
   ========================================================================== */

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

html {
  scroll-behavior: smooth;
}

html, body {
  margin: 0;
  padding: 0;
  height: 100%;
  background-color: var(--bg-primary);
  background-image: radial-gradient(ellipse at 50% 0%, rgba(30, 30, 60, 0.5) 0%, transparent 70%);
}

body {
  color: var(--text-primary);
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.4);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}


/* ==========================================================================
   Typography
   ========================================================================== */

h1, h2, h3, h4, h5, h6 {
  margin: 0 0 16px;
  font-weight: 700;
  color: var(--text-heading);
  text-rendering: optimizelegibility;
  font-family: var(--font-heading);
  letter-spacing: -0.02em;
}

h6 { color: var(--text-secondary); }

h1 small, h2 small, h3 small, h4 small, h5 small, h6 small {
  font-weight: 400;
  color: var(--text-muted);
  font-family: var(--font-body);
  letter-spacing: 0;
}

h1 { font-size: 32px; line-height: 1.3; }
h2 { font-size: 26px; line-height: 1.35; }
h3 { font-size: 20px; line-height: 1.4; }
h4 { font-size: 16px; line-height: 1.5; }

a {
  color: var(--link-color);
  text-decoration: none;
  transition: color 0.25s ease;
}
a:hover {
  color: var(--link-hover);
}

p {
  margin: 0 0 16px;
}

ul, ol {
  line-height: 1.75;
  margin-bottom: 16px;
  padding-left: 1.5em;
}
li {
  margin-bottom: 4px;
}

blockquote {
  border-left: 3px solid var(--accent-blue);
  padding: 8px 20px;
  margin: 16px 0;
  color: #b0b0b0;
  font-style: italic;
  background: rgba(0, 0, 0, 0.15);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
}

hr {
  border: none;
  background: linear-gradient(to right, transparent, rgba(100, 140, 180, 0.25), transparent);
  height: 1px;
  margin: 24px 0;
}

img {
  max-width: 100%;
  height: auto;
}

::selection {
  background: rgba(100, 180, 232, 0.3);
  color: #fff;
}


/* ==========================================================================
   Code
   ========================================================================== */

pre, code {
  color: var(--text-primary);
  font-family: var(--font-code);
  font-size: 0.875em;
}

code {
  background: rgba(0, 0, 0, 0.3);
  padding: 2px 6px;
  border-radius: var(--radius-sm);
}

pre {
  background: rgba(0, 0, 0, 0.35);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 16px 20px;
  line-height: 1.6;
  overflow-x: auto;
  margin-bottom: 16px;
}

pre > code {
  background: none;
  padding: 0;
  border-radius: 0;
  font-size: inherit;
}


/* ==========================================================================
   Layout
   ========================================================================== */

.site {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}
.site-content {
  flex: 1;
}

.container {
  max-width: var(--content-width);
  margin: 0 auto;
  padding: 0 20px;
}


/* ---------- Navbar ---------- */

.site-nav {
  background: var(--bg-deep);
  border-bottom: 1px solid var(--border-accent);
  box-shadow: 0 1px 8px rgba(0, 0, 0, 0.3);
}
.site-nav .container {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}
.site-nav .site-title {
  font-family: var(--font-heading);
  font-size: 18px;
  color: #e0e0e0;
  letter-spacing: -0.02em;
  padding: 10px 0;
  margin-right: 16px;
  white-space: nowrap;
}
.site-nav .site-title:hover {
  color: #fff;
}
.site-nav ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 2px;
}
.site-nav ul a {
  display: block;
  padding: 10px 12px;
  font-size: 14px;
  color: #aaa;
  transition: color 0.25s ease;
}
.site-nav ul a:hover,
.site-nav ul a.active {
  color: #e0e0e0;
}
.site-nav .social {
  margin-left: auto;
}
.site-nav .social a {
  padding: 10px 6px;
  font-size: 14px;
  font-family: var(--font-code);
}


/* ---------- Footer ---------- */

.site-footer {
  background: var(--bg-surface);
  border-top: 1px solid rgba(255, 255, 255, 0.04);
  padding: 20px 0;
  text-align: center;
  color: var(--text-faint);
  font-size: 13px;
}
.site-footer p {
  margin: 0;
}


/* ==========================================================================
   Page Header
   ========================================================================== */

.page-header {
  background: var(--bg-elevated);
  border-bottom: 1px solid var(--border-accent);
  padding: 28px 0 16px;
  margin-bottom: 28px;
}
.page-header h1 {
  color: var(--text-bright);
  margin-bottom: 0;
  font-size: 28px;
}
.page-header h1 small {
  display: block;
  margin-top: 6px;
  font-size: 15px;
  color: var(--text-muted);
}


/* ==========================================================================
   Content
   ========================================================================== */

.content img {
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.5);
  border-radius: var(--radius-md);
}


/* ---------- Post Layout (content + sidebar) ---------- */

.post-layout {
  display: grid;
  grid-template-columns: 1fr var(--sidebar-width);
  gap: var(--gap);
}

.post-main {
  min-width: 0;
}

.post-sidebar section {
  background: var(--bg-surface);
  border: 1px solid rgba(255, 255, 255, 0.05);
  border-radius: var(--radius-lg);
  padding: 16px;
  margin-bottom: 16px;
}
.post-sidebar section h4 {
  font-family: var(--font-heading);
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  margin-bottom: 8px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border-subtle);
}


/* ---------- Post Navigation ---------- */

.post-nav {
  display: flex;
  gap: 8px;
  margin: 24px 0;
}
.btn {
  display: inline-block;
  padding: 8px 16px;
  color: rgba(255, 255, 255, 0.75);
  background: var(--bg-hover);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  font-family: var(--font-body);
  font-size: 13px;
  transition: all 0.25s ease;
  text-decoration: none;
}
.btn:hover {
  background: var(--bg-hover-strong);
  border-color: rgba(255, 255, 255, 0.2);
  color: #fff;
}
.btn.disabled {
  color: rgba(255, 255, 255, 0.3);
  border-color: rgba(255, 255, 255, 0.05);
  pointer-events: none;
}


/* ---------- Post Meta ---------- */

.post-date {
  font-family: var(--font-code);
  font-size: 13px;
  color: var(--text-secondary);
}

.post-category {
  font-family: var(--font-code);
  font-size: 13px;
  color: #c0c0c0;
}


/* ==========================================================================
   Tags
   ========================================================================== */

.tag-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}
.tag-list li {
  margin: 0;
}
.tag-list a {
  display: inline-block;
  padding: 4px 10px;
  background: rgba(255, 255, 255, 0.08);
  color: #c0c0c0;
  border-radius: var(--radius-md);
  font-family: var(--font-code);
  font-size: 12px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  transition: all 0.25s ease;
}
.tag-list a:hover {
  background: rgba(255, 255, 255, 0.14);
  border-color: rgba(255, 255, 255, 0.18);
  color: #fff;
}
.tag-list a span {
  font-size: 0.85em;
  opacity: 0.7;
  margin-left: 2px;
}


/* ==========================================================================
   Archive / Index
   ========================================================================== */

.post-list {
  list-style: none;
  padding: 0;
}
.post-list li {
  margin-bottom: 6px;
}
.post-list .date {
  display: inline-block;
  width: 140px;
  font-family: var(--font-code);
  font-size: 13px;
  color: var(--text-secondary);
}

.post-preview {
  margin-bottom: 32px;
}
.post-preview h2 {
  margin-bottom: 4px;
}
.post-preview .post-meta {
  font-family: var(--font-code);
  font-size: 13px;
  color: var(--text-secondary);
  margin-bottom: 8px;
}


/* ==========================================================================
   Responsive
   ========================================================================== */

@media (max-width: 768px) {
  body {
    font-size: 15px;
  }
  h1 { font-size: 26px; }
  h2 { font-size: 22px; }
  .page-header h1 { font-size: 24px; }

  .post-layout {
    grid-template-columns: 1fr;
  }

  .site-nav .social {
    display: none;
  }

  .post-list .date {
    display: block;
    width: auto;
    margin-bottom: 2px;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 16px;
  }
  .post-nav {
    flex-direction: column;
  }
}