:root {
  --bg: #fdfcf9;
  --bg-subtle: #f7f5f0;
  --card-bg: #ffffff;
  --accent: #2d4a3e;
  --accent-light: #56736a;
  --accent-gold: #c5a358;
  --text-main: #1a1a1a;
  --text-muted: #595959;
  --border: #e8e4db;
  --shadow: 0 4px 20px rgba(0, 0, 0, 0.04);
  --shadow-hover: 0 10px 30px rgba(0, 0, 0, 0.08);
  --font-serif: "DM Serif Display", serif;
  --font-sans: "Inter", sans-serif;
  --font-mono: "JetBrains Mono", monospace;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  background: var(--bg);
  color: var(--text-main);
  font-family: var(--font-sans);
  line-height: 1.6;
}

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 40px;
  width: 100%;
}

/* Navbar - Unified */
.navbar_wrapper {
  border-bottom: 1px solid var(--border);
  background: var(--bg);
  position: sticky;
  top: 0;
  z-index: 1000;
}

.navbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 0;
}

/* Hero Section */
.hero {
  display: grid;
  grid-template-columns: 1fr 400px;
  gap: 80px;
  padding: 100px 0 120px;
  align-items: center;
}

.search-box {
  display: flex;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 8px;
  box-shadow: 0 10px 25px rgba(0,0,0,0.05);
  width: 100%;
  max-width: 500px;
  transition: all 0.3s ease;
}

.search-box:focus-within {
  border-color: var(--accent-light);
  box-shadow: 0 15px 35px rgba(0,0,0,0.08);
}

.search-box input {
  flex: 1;
  border: none;
  outline: none;
  padding: 12px 16px;
  font-size: 1rem;
  background: transparent;
  color: var(--text-main);
  font-family: var(--font-sans);
}

.search-box button {
  background: var(--accent);
  color: white;
  border: none;
  padding: 0 24px;
  border-radius: 10px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
  flex-shrink: 0;
}

@media (max-width: 600px) {
  .search-box {
    flex-direction: column;
    padding: 12px;
    gap: 12px;
  }
  .search-box button {
    padding: 14px;
    width: 100%;
  }
}

.search-box button:hover {
  background: var(--accent-light);
  transform: translateY(-1px);
}

.left h2 {
  font-family: var(--font-serif);
  font-size: clamp(2.5rem, 4.5vw, 3.8rem);
  line-height: 1.15;
  margin-bottom: 24px;
}

.left p {
  font-size: 1.1rem;
  color: var(--text-muted);
  margin-bottom: 32px;
  max-width: 44ch;
}

/* Console */
.console {
  background: #1e1e1e;
  border-radius: 16px;
  padding: 32px;
  box-shadow: 0 20px 40px rgba(0,0,0,0.1);
  color: #d1d1d1;
}

.console-title {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.2em;
  color: #888;
  margin-bottom: 32px;
  text-transform: uppercase;
}

.console p {
  font-family: var(--font-mono);
  font-size: 0.95rem;
  margin-bottom: 16px;
}

/* Main Content */
.main-content {
  padding: 80px 0;
}

.section-head {
  margin-bottom: 48px;
}

.section-head h2 {
  font-family: var(--font-serif);
  font-size: 2.5rem;
  margin-bottom: 12px;
}

.section-head p {
  color: var(--text-muted);
  font-size: 1rem;
}

.topic-link {
  text-decoration: none;
  color: inherit;
  display: block;
}

.topics-container {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.topic-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 32px;
  transition: all 0.3s ease;
  box-shadow: var(--shadow);
}

.topic-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-hover);
}

.topic-card h3 {
  font-family: var(--font-serif);
  font-size: 1.75rem;
  margin-bottom: 24px;
}

.status-rail {
  display: flex;
  background: var(--bg-subtle);
  border-radius: 8px;
  overflow: hidden;
  margin-bottom: 20px;
}

.status-rail button {
  flex: 1;
  border: none;
  padding: 10px;
  font-size: 0.75rem;
  font-weight: 600;
  background: transparent;
  color: var(--text-muted);
  cursor: pointer;
  transition: all 0.2s;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.status-rail button:hover {
  background: rgba(0,0,0,0.05);
}

/* Active Status Colors */
.topic-card.known .status-rail button[data-status="known"] {
  background: var(--known);
  color: white;
}
.topic-card.revision .status-rail button[data-status="revision"] {
  background: var(--revision);
  color: white;
}
.topic-card.unknown .status-rail button[data-status="unknown"] {
  background: var(--unknown);
  color: white;
}

.status-pill {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  padding: 4px 12px;
  border-radius: 20px;
  background: var(--bg-subtle);
  color: var(--text-muted);
}

.topic-card.known .status-pill { background: rgba(45, 74, 62, 0.15); color: var(--known); }
.topic-card.revision .status-pill { background: rgba(197, 163, 88, 0.15); color: var(--revision); }
.topic-card.unknown .status-pill { background: rgba(163, 74, 62, 0.15); color: var(--unknown); }

.topic-card.known { border-left: 6px solid var(--known); background-color: rgba(45, 74, 62, 0.03); }
.topic-card.revision { border-left: 6px solid var(--revision); background-color: rgba(197, 163, 88, 0.03); }
.topic-card.unknown { border-left: 6px solid var(--unknown); background-color: rgba(163, 74, 62, 0.03); }

/* Responsive */
@media (max-width: 900px) {
  .hero { grid-template-columns: 1fr; text-align: center; }
  .left p { margin-left: auto; margin-right: auto; }
  .search-box { margin: 0 auto; }
  .nav-links { display: none; } /* Could add burger menu later */
}