/* ============================================
   Drumlogue Units - GitHub Pages Stylesheet
   ============================================ */

:root {
  /* Colors - Dark theme inspired by synth interfaces */
  --color-bg: #0d1117;
  --color-bg-secondary: #161b22;
  --color-bg-card: #1c2128;
  --color-border: #30363d;
  --color-text: #e6edf3;
  --color-text-secondary: #8b949e;
  --color-text-muted: #6e7681;
  --color-accent: #58a6ff;
  --color-accent-hover: #79b8ff;
  --color-success: #3fb950;
  --color-warning: #d29922;
  --color-synth: #a371f7;
  --color-effect: #39d353;
  --color-reverb: #58a6ff;
  
  /* Typography */
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', 'SF Mono', Monaco, monospace;
  
  /* Spacing */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;
  
  /* Border radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  
  /* Container */
  --container-max: 1100px;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  padding: 0;
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Container */
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  margin-top: var(--spacing-xl);
  margin-bottom: var(--spacing-md);
  font-weight: 600;
  line-height: 1.25;
  color: var(--color-text);
}

h1 { font-size: 2.5rem; margin-top: 0; }
h2 { font-size: 1.75rem; border-bottom: 1px solid var(--color-border); padding-bottom: var(--spacing-sm); }
h3 { font-size: 1.375rem; }
h4 { font-size: 1.125rem; }

p {
  margin-top: 0;
  margin-bottom: var(--spacing-md);
}

a {
  color: var(--color-accent);
  text-decoration: none;
  transition: color 0.15s ease;
}

a:hover {
  color: var(--color-accent-hover);
  text-decoration: underline;
}

/* Code */
code {
  font-family: var(--font-mono);
  font-size: 0.875em;
  background-color: var(--color-bg-secondary);
  padding: 0.2em 0.4em;
  border-radius: var(--radius-sm);
}

pre {
  background-color: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--spacing-md);
  overflow-x: auto;
  font-size: 0.875rem;
}

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

/* Tables */
table {
  width: 100%;
  border-collapse: collapse;
  margin: var(--spacing-lg) 0;
  font-size: 0.9375rem;
}

th, td {
  padding: var(--spacing-sm) var(--spacing-md);
  text-align: left;
  border: 1px solid var(--color-border);
}

th {
  background-color: var(--color-bg-secondary);
  font-weight: 600;
  white-space: nowrap;
}

tr:nth-child(even) {
  background-color: rgba(22, 27, 34, 0.5);
}

/* Lists */
ul, ol {
  padding-left: var(--spacing-xl);
  margin-bottom: var(--spacing-md);
}

li {
  margin-bottom: var(--spacing-xs);
}

/* Horizontal rule */
hr {
  border: none;
  border-top: 1px solid var(--color-border);
  margin: var(--spacing-2xl) 0;
}

/* ============================================
   Header
   ============================================ */

.site-header {
  background-color: var(--color-bg-secondary);
  border-bottom: 1px solid var(--color-border);
  padding: var(--spacing-md) 0;
  position: sticky;
  top: 0;
  z-index: 100;
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.site-title {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-text);
  text-decoration: none;
}

.site-title:hover {
  color: var(--color-text);
  text-decoration: none;
}

.site-title .logo {
  font-size: 1.5rem;
}

.site-nav {
  display: flex;
  gap: var(--spacing-lg);
}

.site-nav a {
  color: var(--color-text-secondary);
  font-weight: 500;
  font-size: 0.9375rem;
  transition: color 0.15s ease;
}

.site-nav a:hover {
  color: var(--color-text);
  text-decoration: none;
}

/* ============================================
   Main Content
   ============================================ */

.site-content {
  padding: var(--spacing-2xl) 0;
  min-height: calc(100vh - 200px);
}

/* Hero */
.hero {
  text-align: center;
  padding: var(--spacing-lg) 0;
  color: var(--color-text-secondary);
  font-size: 1.125rem;
}

/* ============================================
   Unit Cards
   ============================================ */

.unit-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-lg);
  margin: var(--spacing-xl) 0;
}

.unit-card {
  background-color: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
  transition: border-color 0.2s ease, transform 0.2s ease;
}

.unit-card:hover {
  border-color: var(--color-accent);
  transform: translateY(-2px);
}

.unit-card h3 {
  margin-top: 0;
  margin-bottom: var(--spacing-sm);
  font-size: 1.375rem;
}

.unit-card .unit-type {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--color-reverb);
  margin-bottom: var(--spacing-md);
}

.unit-card .unit-version {
  display: block;
  font-size: 0.875rem;
  color: var(--color-text-muted);
  margin-bottom: var(--spacing-md);
}

.unit-card p {
  color: var(--color-text-secondary);
  margin-bottom: var(--spacing-md);
}

/* Buttons */
.btn {
  display: inline-block;
  padding: var(--spacing-sm) var(--spacing-lg);
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--color-accent);
  background-color: transparent;
  border: 1px solid var(--color-accent);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all 0.15s ease;
  text-decoration: none;
}

.btn:hover {
  background-color: var(--color-accent);
  color: var(--color-bg);
  text-decoration: none;
}

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

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

/* ============================================
   Unit Page
   ============================================ */

.breadcrumb {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  margin-bottom: var(--spacing-xl);
}

.breadcrumb a {
  color: var(--color-text-secondary);
}

.unit-header {
  margin-bottom: var(--spacing-2xl);
  padding-bottom: var(--spacing-xl);
  border-bottom: 1px solid var(--color-border);
}

.unit-meta {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-md);
}

.unit-type-badge {
  display: inline-block;
  padding: var(--spacing-xs) var(--spacing-sm);
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  border-radius: var(--radius-sm);
  background-color: var(--color-reverb);
  color: var(--color-bg);
}

.unit-type-badge.synth,
.unit-type-badge.synthesizer {
  background-color: var(--color-synth);
}

.unit-type-badge.reverb,
.unit-type-badge.effect {
  background-color: var(--color-reverb);
}

.unit-header .unit-version {
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

.unit-header h1 {
  font-size: 2.5rem;
  margin-bottom: var(--spacing-sm);
}

.unit-tagline {
  font-size: 1.25rem;
  color: var(--color-text-secondary);
  margin-bottom: var(--spacing-lg);
}

/* ============================================
   Units List Page
   ============================================ */

.units-list {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
}

.unit-list-item {
  display: flex;
  gap: var(--spacing-xl);
  padding: var(--spacing-xl);
  background-color: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  transition: border-color 0.2s ease;
}

.unit-list-item:hover {
  border-color: var(--color-accent);
  text-decoration: none;
}

.unit-list-item .unit-icon {
  font-size: 3rem;
  flex-shrink: 0;
}

.unit-list-item .unit-info h3 {
  margin-top: 0;
  margin-bottom: var(--spacing-xs);
}

.unit-list-item .unit-info p {
  color: var(--color-text-secondary);
  margin-bottom: var(--spacing-sm);
}

/* ============================================
   Feature Grid
   ============================================ */

.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-lg);
  margin: var(--spacing-xl) 0;
}

.feature-item {
  padding: var(--spacing-lg);
  background-color: var(--color-bg-card);
  border-radius: var(--radius-md);
}

.feature-item h4 {
  margin-top: 0;
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.feature-item p {
  color: var(--color-text-secondary);
  margin-bottom: 0;
}

/* ============================================
   Footer
   ============================================ */

.site-footer {
  background-color: var(--color-bg-secondary);
  border-top: 1px solid var(--color-border);
  padding: var(--spacing-xl) 0;
  text-align: center;
  color: var(--color-text-muted);
  font-size: 0.875rem;
}

.site-footer a {
  color: var(--color-text-secondary);
}

.footer-links {
  text-align: center;
  padding: var(--spacing-lg);
  color: var(--color-text-muted);
}

.footer-links a {
  color: var(--color-text-secondary);
}

/* ============================================
   Responsive
   ============================================ */

@media (max-width: 768px) {
  h1 { font-size: 2rem; }
  h2 { font-size: 1.5rem; }
  
  .site-header .container {
    flex-direction: column;
    gap: var(--spacing-md);
  }
  
  .site-nav {
    gap: var(--spacing-md);
  }
  
  .unit-grid {
    grid-template-columns: 1fr;
  }
  
  .unit-list-item {
    flex-direction: column;
    text-align: center;
  }
  
  table {
    display: block;
    overflow-x: auto;
  }
}

/* ============================================
   Utility Classes
   ============================================ */

.text-center { text-align: center; }
.text-muted { color: var(--color-text-muted); }
.mt-0 { margin-top: 0; }
.mb-0 { margin-bottom: 0; }
.mt-lg { margin-top: var(--spacing-lg); }
.mb-lg { margin-bottom: var(--spacing-lg); }