/* Component styles using shadcn tokens */
* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: var(--background);
  color: var(--foreground);
  line-height: 1.6;
  min-height: 100vh;
}

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

/* Header */
.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1.5rem;
  border-bottom: 1px solid var(--border);
  background: var(--card);
}

.site-header nav {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.site-logo {
  font-weight: 600;
  font-size: 1.125rem;
  color: var(--foreground);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.5rem 1rem;
  font-size: 0.875rem;
  font-weight: 500;
  border-radius: var(--radius);
  border: none;
  cursor: pointer;
  transition: background 0.2s, color 0.2s;
}

.btn-primary {
  background: var(--primary);
  color: var(--primary-foreground);
}
.btn-primary:hover {
  opacity: 0.9;
}

.btn-secondary {
  background: var(--secondary);
  color: var(--secondary-foreground);
  border: 1px solid var(--border);
}
.btn-secondary:hover {
  background: var(--accent);
}

.btn-ghost {
  background: transparent;
  color: var(--foreground);
}
.btn-ghost:hover {
  background: var(--accent);
}

/* Theme toggle */
.theme-toggle {
  padding: 0.5rem;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--foreground);
  cursor: pointer;
}
.theme-toggle:hover {
  background: var(--accent);
}
.theme-toggle:focus-visible {
  outline: 2px solid var(--ring);
  outline-offset: 2px;
}

/* Cards */
.card {
  background: var(--card);
  color: var(--card-foreground);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem;
  transition: border-color 0.2s;
}

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

.card h3 {
  margin: 0 0 0.5rem;
  font-size: 1rem;
  font-weight: 600;
}

.card p {
  margin: 0;
  font-size: 0.875rem;
  color: var(--muted-foreground);
}

/* Phase cards - links to phase pages */
a.phase-card {
  display: block;
  text-decoration: none;
  color: inherit;
  cursor: pointer;
}
a.phase-card:hover {
  text-decoration: none;
}

.phase-flowchart {
  margin-top: 1rem;
  padding: 1rem;
  background: var(--muted);
  border-radius: var(--radius);
  overflow-x: auto;
}

.phase-flowchart svg {
  max-width: 100%;
  height: auto;
}

/* Hero */
.hero {
  text-align: center;
  padding: 3rem 1.5rem;
  max-width: 42rem;
  margin: 0 auto;
}

.hero h1 {
  font-size: 2rem;
  font-weight: 700;
  margin: 0 0 0.5rem;
}

.hero p {
  color: var(--muted-foreground);
  margin: 0 0 2rem;
}

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

/* Container */
.container {
  width: 80%;
  max-width: 80vw;
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* Phase grid (legacy, kept for reference) */
.phases-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1rem;
}

/* Phases vertical stepper layout */
.phases-stepper-layout {
  display: flex;
  gap: 2rem;
  align-items: flex-start;
}

.phases-stepper {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  min-width: 220px;
  flex-shrink: 0;
}

.phases-stepper-step {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  width: 100%;
  text-align: left;
  cursor: pointer;
  border: 1px solid var(--border);
  background: var(--card);
}

.phases-stepper-step:hover {
  border-color: var(--ring);
}

.phases-stepper-step.active {
  border-color: var(--primary);
  background: var(--accent);
}

.phases-stepper-num {
  font-weight: 600;
  font-size: 0.75rem;
  color: var(--muted-foreground);
  min-width: 1.5rem;
}

.phases-stepper-step.active .phases-stepper-num {
  color: var(--primary);
}

.phases-stepper-name {
  font-size: 0.875rem;
  font-weight: 500;
  flex: 1;
}

.phases-detail {
  flex: 1;
  min-width: 0;
}

.phases-detail .hidden {
  display: none;
}

@media (max-width: 768px) {
  .phases-stepper-layout {
    flex-direction: column;
  }
  .phases-stepper {
    min-width: 100%;
  }
}

/* Mermaid container */
.mermaid-container {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  margin-bottom: 2rem;
  overflow-x: auto;
}

.mermaid-container svg {
  max-width: 100%;
}

/* Clickable Mermaid nodes - hover state */
.mermaid-container svg a,
.phase-flowchart svg a {
  cursor: pointer;
  transition: filter 0.15s ease, fill 0.15s ease;
}
.mermaid-container svg a:hover rect,
.mermaid-container svg a:hover polygon,
.mermaid-container svg a:hover ellipse,
.phase-flowchart svg a:hover rect,
.phase-flowchart svg a:hover polygon,
.phase-flowchart svg a:hover ellipse {
  fill: var(--primary) !important;
  fill-opacity: 0.5;
}
.mermaid-container svg a:hover,
.phase-flowchart svg a:hover {
  filter: brightness(1.2);
}
.mermaid-container svg a:focus-visible,
.phase-flowchart svg a:focus-visible {
  outline: 2px solid var(--ring);
  outline-offset: 2px;
}

/* Phase prose — rendered markdown from skills */
.phase-prose {
  font-size: 0.9375rem;
  line-height: 1.7;
}
.phase-prose h2 {
  font-size: 1.25rem;
  font-weight: 600;
  margin: 2rem 0 0.75rem;
  padding-bottom: 0.25rem;
  border-bottom: 1px solid var(--border);
}
.phase-prose h2:first-child {
  margin-top: 0;
}
.phase-prose h3 {
  font-size: 1.0625rem;
  font-weight: 600;
  margin: 1.5rem 0 0.5rem;
}
.phase-prose h4 {
  font-size: 1rem;
  font-weight: 600;
  margin: 1.25rem 0 0.5rem;
}
.phase-prose p {
  margin: 0 0 1rem;
  color: var(--foreground);
}
.phase-prose ul, .phase-prose ol {
  margin: 0 0 1rem;
  padding-left: 1.5rem;
}
.phase-prose li {
  margin-bottom: 0.25rem;
}
.phase-prose strong {
  font-weight: 600;
}
.phase-prose code {
  font-size: 0.875em;
  padding: 0.15em 0.4em;
  background: var(--muted);
  border-radius: var(--radius);
  font-family: ui-monospace, monospace;
}
.phase-prose pre {
  margin: 1rem 0;
  padding: 1rem;
  background: var(--muted);
  border-radius: var(--radius);
  overflow-x: auto;
  font-size: 0.8125rem;
}
.phase-prose pre code {
  padding: 0;
  background: none;
}
.phase-prose blockquote {
  margin: 1rem 0;
  padding-left: 1rem;
  border-left: 4px solid var(--border);
  color: var(--muted-foreground);
}
.phase-prose table {
  width: 100%;
  border-collapse: collapse;
  margin: 1rem 0;
  font-size: 0.875rem;
}
.phase-prose th, .phase-prose td {
  padding: 0.5rem 0.75rem;
  border: 1px solid var(--border);
  text-align: left;
}
.phase-prose th {
  font-weight: 600;
  background: var(--muted);
}
.phase-prose hr {
  margin: 2rem 0;
  border: none;
  border-top: 1px solid var(--border);
}
.phase-prose a {
  color: var(--primary);
  text-decoration: none;
}
.phase-prose a:hover {
  text-decoration: underline;
}

/* Responsive */
@media (max-width: 640px) {
  .phases-grid {
    grid-template-columns: 1fr;
  }
  .hero h1 {
    font-size: 1.5rem;
  }
}