/* Compendium Theme - Substack Style */
/* Modern, minimal, readable - like Substack articles */

/* ========== COLORS ========== */
:root {
  --primary: #4A7C59;      /* Forest Green */
  --secondary: #8B6F47;    /* Copper Brown */
  --bg: #FAFAFA;           /* Light Gray (Substack-style) */
  --bg-alt: #FFFFFF;       /* White */
  --text: #1A1A1A;         /* Almost Black */
  --text-light: #555555;   /* Medium Gray */
  --text-muted: #888888;   /* Light Gray */
  --accent: #00FFFF;       /* Neon Cyan (Oracle content) */
  --border: #E8E8E8;       /* Light Border */
  --shadow: 0 2px 12px rgba(0,0,0,0.06);
}

[data-theme="dark"] {
  --bg: #121212;
  --bg-alt: #1A1A1A;
  --text: #E0E0E0;
  --text-light: #B0B0B0;
  --text-muted: #666666;
  --accent: #66E0FF;
  --border: #2A2A2A;
  --shadow: 0 2px 12px rgba(0,0,0,0.3);
}

/* ========== BASE STYLES ========== */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  font-size: 17px;
  font-weight: 400;
  letter-spacing: 0.01em;
}

/* ========== TYPOGRAPHY ========== */
h1, h2, h3, h4, h5, h6 {
  font-family: 'Georgia', 'Merriweather', serif;
  font-weight: 700;
  line-height: 1.3;
  margin: 1.5em 0 1em 0;
  color: var(--text);
}

h1 { font-size: 2.2rem; }
h2 { font-size: 1.8rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.3rem; }
h5 { font-size: 1.15rem; }
h6 { font-size: 1.1rem; }

p {
  margin: 1.5em 0 1.5em 0;
  line-height: 1.8;
}

/* ========== LAYOUT ========== */
.container {
  max-width: 720px;  /* Substack-style narrow width */
  margin: 0 auto;
  padding: 0 20px;
}

/* ========== HEADER & HERO ========== */
.hero {
  background: linear-gradient(135deg, var(--primary) 0%, #2D4A36 100%);
  color: white;
  padding: 100px 0 80px;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background-image: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.05'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
  opacity: 0.5;
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 720px;
  margin: 0 auto;
  padding: 0 20px;
}

.hero-logo {
  width: 280px;
  height: 280px;
  border-radius: 8px;
  object-fit: cover;
  margin: 0 auto 40px;
  border: 4px solid rgba(255,255,255,0.2);
  box-shadow: 0 12px 40px rgba(0,0,0,0.3);
}

.hero-banner {
  width: 100%;
  max-width: 1200px;
  height: 300px;
  object-fit: cover;
  border-radius: 8px;
  margin: 0 auto 40px;
  display: block;
  box-shadow: 0 8px 32px rgba(0,0,0,0.2);
  opacity: 0;
  animation: fadeIn 1.5s ease-in-out 0.3s both;
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}
@media (max-width: 768px) {
  .hero-logo {
    width: 180px;
    height: 180px;
  }
  
  .hero-banner {
    height: 200px;
  }
}

.hero-text {
  font-size: 1.4rem;
  font-weight: 500;
  margin-bottom: 20px;
  line-height: 1.6;
}

.hero-subtitle {
  font-size: 1rem;
  opacity: 0.9;
  margin-bottom: 40px;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.hero-cta {
  display: inline-block;
  background: white;
  color: var(--primary);
  padding: 14px 32px;
  border-radius: 25px;
  text-decoration: none;
  font-weight: 600;
  font-size: 1rem;
  transition: transform 0.2s, box-shadow 0.2s;
}

.hero-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0,0,0,0.2);
}

/* ========== NAVIGATION ========== */
nav {
  background: var(--bg-alt);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: var(--shadow);
}

nav .container {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 2px;
  padding: 0;
}

nav a {
  color: var(--text);
  text-decoration: none;
  padding: 16px 20px;
  display: block;
  font-weight: 500;
  font-size: 0.95rem;
  transition: background 0.2s;
  border-bottom: 3px solid transparent;
}

nav a:hover {
  background: var(--bg);
  border-bottom-color: var(--primary);
}

nav a.active {
  border-bottom-color: var(--primary);
  color: var(--primary);
}

/* ========== THEME TOGGLE ========== */
.theme-toggle {
  position: fixed;
  top: 20px;
  right: 20px;
  z-index: 1001;
  background: var(--bg-alt);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 10px 16px;
  border-radius: 25px;
  cursor: pointer;
  font-size: 0.9rem;
  font-weight: 500;
  backdrop-filter: blur(10px);
  transition: all 0.3s;
  box-shadow: var(--shadow);
}

.theme-toggle:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(0,0,0,0.12);
}

/* ========== CONTENT CARDS ========== */
.post-card {
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 32px;
  margin: 24px 0;
  transition: all 0.3s;
  box-shadow: var(--shadow);
}

.post-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 32px rgba(0,0,0,0.1);
  border-color: var(--primary);
}

.post-card h2 {
  margin-bottom: 12px;
  color: var(--primary);
}

.post-card .card-meta {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-bottom: 16px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border);
}

.post-card p {
  margin-bottom: 20px;
}

.post-card .card-link {
  display: inline-block;
  margin-top: 16px;
  padding: 10px 20px;
  background: var(--primary);
  color: white;
  text-decoration: none;
  border-radius: 6px;
  font-weight: 500;
  transition: background 0.2s;
}

.post-card .card-link:hover {
  background: var(--secondary);
}

/* ========== SECTIONS ========== */
.section-header {
  text-align: center;
  margin: 60px 0 40px;
}

.section-header h2 {
  font-size: 1.8rem;
  color: var(--primary);
  margin-bottom: 8px;
}

.section-header p {
  color: var(--text-light);
  font-size: 1.05rem;
}

/* ========== TABLES (Substack Style) ========== */
table {
  width: 100%;
  border-collapse: collapse;
  margin: 2em 0;
  font-size: 0.95rem;
}

table th,
table td {
  padding: 12px 16px;
  text-align: left;
  border-bottom: 1px solid var(--border);
}

table th {
  background: var(--bg-alt);
  font-weight: 600;
  color: var(--primary);
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

table tbody tr:hover {
  background: rgba(74, 124, 89, 0.05);
}

table caption {
  caption-side: top;
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 12px;
  color: var(--primary);
}

/* ========== QUOTES ========== */
blockquote {
  border-left: 4px solid var(--primary);
  padding: 16px 20px;
  margin: 2em 0;
  background: rgba(74, 124, 89, 0.05);
  border-radius: 0 8px 8px 0;
  font-style: italic;
}

blockquote p {
  margin: 0;
  font-size: 1.1rem;
}

/* ========== CODE BLOCKS ========== */
pre {
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 20px;
  overflow-x: auto;
  margin: 2em 0;
}

code {
  font-family: 'SF Mono', 'Monaco', 'Inconsolata', 'Fira Mono', monospace;
  font-size: 0.9em;
}

pre code {
  background: none;
  padding: 0;
}

/* ========== FOOTER ========== */
footer {
  background: var(--bg-alt);
  border-top: 1px solid var(--border);
  padding: 40px 0;
  margin-top: 80px;
  text-align: center;
}

footer p {
  color: var(--text-muted);
  font-size: 0.95rem;
  margin: 8px 0;
}

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

/* ========== COMING SOON CARD ========== */
.coming-soon {
  border: 2px dashed var(--border);
  border-radius: 12px;
  padding: 40px 30px;
  text-align: center;
  background: var(--bg-alt);
}

.coming-soon h3 {
  color: var(--primary);
  margin-bottom: 12px;
  font-family: 'Georgia', serif;
}

.coming-soon p {
  color: var(--text-light);
  margin: 8px 0;
}

.coming-soon p:last-child {
  font-size: 0.9rem;
  opacity: 0.7;
  margin-top: 16px;
}

/* ========== GRID LAYOUT ========== */
.home-grid {
  display: grid;
  gap: 24px;
  margin: 30px 0;
}

/* ========== RESPONSIVE ========== */
@media (max-width: 768px) {
  .hero {
    padding: 80px 0 60px;
  }
  
  .hero-logo {
    width: 140px;
    height: 140px;
  }
  
  .hero-text {
    font-size: 1.2rem;
  }
  
  nav a {
    padding: 14px 16px;
    font-size: 0.9rem;
  }
  
  .post-card {
    padding: 24px;
  }
  
  table {
    font-size: 0.85rem;
  }
  
  table th,
  table td {
    padding: 10px 12px;
  }
}

@media (max-width: 600px) {
  .container {
    padding: 0 16px;
  }
  
  .hero-text {
    font-size: 1.1rem;
  }
  
  .hero-subtitle {
    font-size: 0.95rem;
  }
  
  .hero-cta {
    padding: 12px 28px;
    font-size: 0.95rem;
  }
  
  h1 {
    font-size: 1.8rem;
  }
  
  h2 {
    font-size: 1.5rem;
  }
  
  body {
    font-size: 16px;
  }
}

/* ========== ANIMATIONS ========== */
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.post-card {
  animation: fadeIn 0.6s ease-out;
}

/* ========== DIVIDER STYLING ========== */
hr.divider {
  border: none;
  height: 1px;
  background: var(--border);
  margin: 2.5em 0;
  opacity: 0.4;
}

hr.divider::after {
  content: '';
  position: absolute;
  top: -10px;
  left: 50%;
  width: 60px;
  height: 20px;
  background: radial-gradient(circle, var(--primary) 0%, transparent 70%);
  opacity: 0.3;
}