/* ===================================================
   Mr. Pumpkin — Dark Theme CSS
   Orange accent: #FF6B00 | Background: #0d0d0d
   =================================================== */

/* --- Reset & Base --- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg:        #0d0d0d;
  --bg-card:   #1a1a1a;
  --bg-code:   #111;
  --border:    #2a2a2a;
  --text:      #e8e8e8;
  --text-muted:#999;
  --accent:    #FF6B00;
  --accent-dim:#c25200;
  --link:      #FF8C33;
  --radius:    6px;
  --max-width: 1100px;
  --font:      -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-mono: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
}

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.7;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* --- Typography --- */
h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.25;
  color: #fff;
  margin-bottom: 0.6em;
}
h1 { font-size: 2.2rem; }
h2 { font-size: 1.7rem; margin-top: 2rem; }
h3 { font-size: 1.3rem; margin-top: 1.5rem; }
h4 { font-size: 1.1rem; margin-top: 1.2rem; }

p { margin-bottom: 1rem; }

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

hr {
  border: none;
  border-top: 1px solid var(--border);
  margin: 2rem 0;
}

ul, ol { padding-left: 1.5rem; margin-bottom: 1rem; }
li { margin-bottom: 0.3rem; }

blockquote {
  border-left: 4px solid var(--accent);
  padding: 0.5rem 1rem;
  margin: 1rem 0;
  background: var(--bg-card);
  border-radius: 0 var(--radius) var(--radius) 0;
  color: var(--text-muted);
}

/* --- Code --- */
code, kbd {
  font-family: var(--font-mono);
  font-size: 0.88em;
  background: var(--bg-code);
  border: 1px solid var(--border);
  border-radius: 3px;
  padding: 0.1em 0.4em;
  color: #FF8C33;
}

pre {
  background: var(--bg-code);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.2rem;
  overflow-x: auto;
  margin-bottom: 1.2rem;
}

pre code {
  background: none;
  border: none;
  padding: 0;
  font-size: 0.88rem;
  color: #e8e8e8;
}

/* --- Layout --- */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
  width: 100%;
}

/* --- Header --- */
.site-header {
  background: #111;
  border-bottom: 2px solid var(--accent);
  position: sticky;
  top: 0;
  z-index: 100;
  padding: 0.6rem 0 0;
}

.header-inner {
  display: flex;
  flex-direction: row;
  align-items: center;
  gap: 0;
}

/* Top row: logo left, search right */
.header-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 0.5rem;
}

/* Bottom row: hamburger + nav */
.header-bottom {
  display: flex;
  align-items: center;
  border-top: 1px solid var(--border);
  padding-top: 0.35rem;
  padding-bottom: 0.35rem;
  gap: 0.5rem;
}

.site-logo {
  font-size: 1.3rem;
  font-weight: 800;
  color: var(--accent) !important;
  text-decoration: none !important;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-shrink: 0;
}

.site-logo img {
  height: 36px;
  width: auto;
}

.logo-fallback { display: none; }

/* Show fallback only when img fails (onerror sets display:none on the img) */
.site-logo img[style*="display: none"] + .logo-fallback,
.site-logo img[style*="display:none"] + .logo-fallback {
  display: inline;
}

/* --- Nav --- */
.site-nav {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  flex: 1;
  flex-wrap: wrap;
}

.nav-link {
  color: var(--text-muted);
  padding: 0.35rem 0.75rem;
  border-radius: var(--radius);
  font-size: 0.9rem;
  transition: color 0.2s, background 0.2s;
  text-decoration: none !important;
}

.nav-link:hover, .nav-link.active {
  color: var(--accent);
  background: rgba(255, 107, 0, 0.1);
}

/* --- Hamburger --- */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
  flex-shrink: 0;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: transform 0.2s;
}

/* --- Search --- */
.header-search { flex-shrink: 0; }

.search-form {
  display: flex;
  align-items: center;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 20px;
  overflow: hidden;
  transition: border-color 0.2s;
}

.search-form:focus-within { border-color: var(--accent); }

.search-input {
  background: none;
  border: none;
  color: var(--text);
  padding: 0.3rem 0.75rem;
  font-size: 0.85rem;
  width: 160px;
  outline: none;
}

.search-input::placeholder { color: var(--text-muted); }

.search-btn {
  background: none;
  border: none;
  color: var(--text-muted);
  padding: 0.3rem 0.6rem;
  cursor: pointer;
  font-size: 0.85rem;
}

.search-btn:hover { color: var(--accent); }

/* --- Main --- */
.site-main {
  flex: 1;
  padding: 2.5rem 0 4rem;
}

/* --- Footer --- */
.site-footer {
  background: #111;
  border-top: 1px solid var(--border);
  padding: 1.5rem 0;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.footer-brand { color: var(--accent); font-weight: 700; }

.footer-nav { display: flex; gap: 1rem; }
.footer-nav a { color: var(--text-muted); }
.footer-nav a:hover { color: var(--accent); }

/* --- Buttons --- */
.btn {
  display: inline-block;
  padding: 0.6rem 1.4rem;
  border-radius: var(--radius);
  font-weight: 600;
  font-size: 0.95rem;
  text-decoration: none !important;
  transition: background 0.2s, color 0.2s;
  cursor: pointer;
  border: none;
}

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

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

.btn-outline {
  background: transparent;
  color: var(--accent);
  border: 2px solid var(--accent);
}

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

/* --- Hero Section --- */
.hero {
  text-align: center;
  padding: 4rem 0 3rem;
}

.hero-logo {
  font-size: 5rem;
  display: block;
  margin-bottom: 1rem;
  line-height: 1;
}

.hero h1 {
  font-size: 3rem;
  color: var(--accent);
  margin-bottom: 0.5rem;
}

.hero .tagline {
  font-size: 1.3rem;
  color: var(--text-muted);
  margin-bottom: 1.5rem;
}

.hero .description {
  max-width: 600px;
  margin: 0 auto 2rem;
  color: var(--text);
}

.hero-actions { display: flex; gap: 1rem; justify-content: center; flex-wrap: wrap; }

.demo-placeholder {
  background: var(--bg-card);
  border: 2px dashed var(--border);
  border-radius: var(--radius);
  padding: 3rem;
  text-align: center;
  color: var(--text-muted);
  margin: 3rem 0;
  font-size: 0.9rem;
}

.demo-placeholder .demo-icon { font-size: 4rem; display: block; margin-bottom: 1rem; }

/* --- Stats --- */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 1rem;
  margin: 2rem 0;
}

.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.2rem;
  text-align: center;
}

.stat-number { font-size: 2rem; font-weight: 800; color: var(--accent); }
.stat-label { font-size: 0.85rem; color: var(--text-muted); }

/* --- Feature Cards --- */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
  margin: 2rem 0;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  transition: border-color 0.2s;
}

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

.feature-icon { font-size: 2rem; margin-bottom: 0.75rem; display: block; }
.feature-card h3 { font-size: 1.05rem; margin-top: 0; color: var(--accent); }
.feature-card p { font-size: 0.9rem; color: var(--text-muted); margin: 0; }

/* --- Blog --- */
.post-list { list-style: none; padding: 0; }

.post-item {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  margin-bottom: 1.2rem;
  transition: border-color 0.2s;
}

.post-item:hover { border-color: var(--accent); }

.post-item h2 { font-size: 1.3rem; margin-top: 0; }
.post-item h2 a { color: var(--text); }
.post-item h2 a:hover { color: var(--accent); text-decoration: none; }

.post-meta { font-size: 0.82rem; color: var(--text-muted); margin-bottom: 0.75rem; }

.post-excerpt { font-size: 0.92rem; color: var(--text-muted); margin-bottom: 0; }

.post-read-more {
  display: inline-block;
  margin-top: 0.75rem;
  font-size: 0.85rem;
  color: var(--accent);
}

/* Pagination */
.pagination {
  display: flex;
  justify-content: center;
  gap: 0.5rem;
  margin-top: 2rem;
  flex-wrap: wrap;
}

.pagination a, .pagination span {
  padding: 0.4rem 0.8rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 0.9rem;
  color: var(--text-muted);
  text-decoration: none;
}

.pagination a:hover { border-color: var(--accent); color: var(--accent); }
.pagination .current { background: var(--accent); color: #fff; border-color: var(--accent); }

/* --- Post / Page Content --- */
.post-header, .page-header { margin-bottom: 2rem; border-bottom: 1px solid var(--border); padding-bottom: 1.5rem; }
.post-title, .page-title { color: var(--accent); }
.post-meta { color: var(--text-muted); font-size: 0.9rem; }
.post-excerpt { font-size: 1.05rem; color: var(--text-muted); margin-top: 0.5rem; }
.post-footer { margin-top: 2.5rem; border-top: 1px solid var(--border); padding-top: 1.5rem; }

/* --- Doc page nav cards --- */
.doc-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.2rem;
  margin: 2rem 0;
}

.doc-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem;
  transition: border-color 0.2s;
}

.doc-card:hover { border-color: var(--accent); }
.doc-card h3 { font-size: 1rem; margin: 0 0 0.4rem; color: var(--accent); }
.doc-card p { font-size: 0.85rem; color: var(--text-muted); margin: 0; }
.doc-card a { text-decoration: none; color: inherit; display: block; }

/* --- MIT badge --- */
.badge { display: inline-block; }
.badge img { vertical-align: middle; }

/* --- Tables --- */
table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 1.2rem;
  font-size: 0.9rem;
}

thead tr { background: var(--bg-card); }

th, td {
  padding: 0.6rem 0.9rem;
  border: 1px solid var(--border);
  text-align: left;
}

th { color: var(--accent); font-weight: 600; }
tr:nth-child(even) { background: #141414; }

/* --- Responsive --- */
@media (max-width: 768px) {
  h1 { font-size: 1.7rem; }
  h2 { font-size: 1.4rem; }
  .hero h1 { font-size: 2.2rem; }

  .nav-toggle { display: flex; }

  .header-inner { flex-wrap: wrap; }

  .header-search { margin-left: auto; }

  .site-nav {
    display: none;
    flex-direction: column;
    order: 10;
    width: 100%;
    background: #111;
    padding: 0.5rem 0;
    gap: 0;
  }

  .site-nav.open { display: flex; }

  .nav-link {
    padding: 0.6rem 1rem;
    width: 100%;
    border-radius: 0;
  }

  .search-input { width: 120px; }

  .footer-inner { flex-direction: column; align-items: flex-start; }

  .stats-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 480px) {
  .hero h1 { font-size: 1.8rem; }
  .hero .tagline { font-size: 1.1rem; }
  .hero-actions { flex-direction: column; align-items: center; }
  .stats-grid { grid-template-columns: 1fr 1fr; }
}