:root {
  --primary: #2b3a4a;
  --primary-light: #3a4d61;
  --accent: #d96b27;
  --accent-hover: #bf5b1d;
  --bg: #f8f9fa;
  --card-bg: #ffffff;
  --text: #212529;
  --text-muted: #6c757d;
  --border: #e9ecef;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background-color: var(--bg);
  color: var(--text);
  margin: 0;
  line-height: 1.6;
}

header {
  background: var(--primary);
  color: white;
  padding: 1rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

header a { color: white; text-decoration: none; font-weight: 600; }
header nav a { margin-left: 1.5rem; }

.container { max-width: 900px; margin: 2rem auto; padding: 0 1rem; }

.btn {
  background: var(--accent);
  color: white;
  padding: 0.6rem 1.2rem;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  text-decoration: none;
  display: inline-block;
  transition: background 0.2s ease;
}

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

.card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 1.5rem;
  margin-bottom: 1.5rem;
  box-shadow: 0 2px 4px rgba(0,0,0,0.02);
}

.hero-card h1 {
  margin-top: 0;
  color: var(--primary);
  font-size: 2.2rem;
}

.hero-card .tagline {
  font-size: 1.15rem;
  color: var(--accent);
  font-weight: 600;
  margin-bottom: 1.5rem;
}

h2 {
  color: var(--primary);
  margin-top: 0;
}

/* Diagrams */
.diagram-box {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 1.25rem;
  margin: 1.5rem 0;
  text-align: center;
}

.diagram-header {
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 1rem;
  letter-spacing: 0.05em;
}

.comparison-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

@media (max-width: 600px) {
  .comparison-grid {
    grid-template-columns: 1fr;
  }
}

.branch-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 1rem;
}

.branch-card.highlight {
  border-color: var(--accent);
}

.branch-card h3 {
  margin: 0 0 0.2rem 0;
  font-size: 1.05rem;
}

.branch-card .subtitle {
  font-size: 0.825rem;
  color: var(--text-muted);
  display: block;
  margin-bottom: 0.75rem;
}

.branch-card .quote-box {
  background: var(--bg);
  padding: 0.5rem;
  border-radius: 4px;
  font-size: 0.9rem;
  font-style: italic;
  margin-bottom: 0.75rem;
}

.branch-card .outcome {
  margin: 0;
  font-size: 0.95rem;
}

/* Steps Grid */
.steps-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  margin-top: 1.25rem;
}

@media (max-width: 768px) {
  .steps-grid {
    grid-template-columns: 1fr;
  }
}

.step-card {
  background: var(--bg);
  border-left: 4px solid var(--accent);
  padding: 1rem;
  border-radius: 0 4px 4px 0;
}

.step-card .step-num {
  font-size: 0.75rem;
  text-transform: uppercase;
  color: var(--accent);
  font-weight: 700;
  display: block;
  margin-bottom: 0.25rem;
}

.step-card h3 {
  margin: 0 0 0.5rem 0;
  font-size: 1rem;
  color: var(--primary);
}

.step-card p {
  font-size: 0.9rem;
  margin: 0;
}

/* Matrix Table */
.table-responsive {
  overflow-x: auto;
  margin-top: 1rem;
}

.matrix-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.925rem;
}

.matrix-table th, .matrix-table td {
  padding: 0.75rem 0.9rem;
  border: 1px solid var(--border);
  text-align: left;
}

.matrix-table th {
  background-color: var(--primary);
  color: white;
  font-weight: 600;
}

.matrix-table tr:nth-child(even) {
  background-color: var(--bg);
}

.badge {
  display: inline-block;
  background: var(--accent);
  color: white;
  font-size: 0.8rem;
  font-weight: 700;
  padding: 0.2rem 0.5rem;
  border-radius: 4px;
  white-space: nowrap;
}

/* Lists and Sign-off */
.philosophy-list {
  padding-left: 1.25rem;
  margin-bottom: 1.5rem;
}

.philosophy-list li {
  margin-bottom: 0.5rem;
}

.signature {
  font-weight: 600;
  color: var(--primary);
  margin-top: 1.5rem;
}

/* Threads Styling */
.thread-card h3 {
  margin: 0 0 0.5rem 0;
}

.thread-card h3 a {
  color: var(--primary);
  text-decoration: none;
}

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

.thread-card .meta {
  color: var(--text-muted);
}

.no-threads {
  color: var(--text-muted);
  font-style: italic;
}

/* Form & Flash styles */
.form-group { margin-bottom: 1.2rem; }
.form-group label { display: block; margin-bottom: 0.4rem; font-weight: 600; }
.form-group input, .form-group textarea, .form-group select {
  width: 100%; padding: 0.6rem; border: 1px solid #ccc; border-radius: 4px; box-sizing: border-box;
}

.flash { padding: 0.8rem; border-radius: 4px; margin-bottom: 1rem; }
.flash.success { background: #d4edda; color: #155724; }
.flash.error { background: #f8d7da; color: #721c24; }
.flash.info { background: #e2e3e5; color: #383d41; }