/* CSS Reset and Base Styles */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

/* CSS Variables */
:root {
  /* Colors - Dark Theme */
  --color-bg: #0a0a0a;
  --color-text: #f5f5f5;
  --color-text-secondary: #a0a0a0;
  --color-border: #2a2a2a;
  --color-hover: #1a1a1a;
  --color-accent: #3b82f6;
  --color-shadow: rgba(0, 0, 0, 0.3);

  /* Typography */
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-size-base: 16px;
  --font-size-lg: 20px;
  --font-size-xl: 28px;

  /* Spacing */
  --spacing-xs: 8px;
  --spacing-sm: 16px;
  --spacing-md: 24px;
  --spacing-lg: 32px;
  --spacing-xl: 48px;

  /* Border Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;

  /* Breakpoints (for reference in media queries) */
  --bp-mobile: 640px;
  --bp-tablet: 768px;
  --bp-desktop: 1024px;
}

/* Base Styles */
html {
  font-size: var(--font-size-base);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-weight: 600;
  line-height: 1.2;
}

h1 {
  font-size: var(--font-size-xl);
  margin-bottom: var(--spacing-md);
}

h2 {
  font-size: var(--font-size-lg);
  margin-bottom: var(--spacing-sm);
}

p {
  margin-bottom: var(--spacing-sm);
}

a {
  color: inherit;
  text-decoration: none;
}

/* Images */
img {
  max-width: 100%;
  height: auto;
  display: block;
}

/* Buttons */
button {
  font-family: inherit;
  font-size: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

/* Album Index Page Styles */
.index-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: var(--spacing-xl) var(--spacing-md);
}

.index-header {
  text-align: center;
  margin-bottom: var(--spacing-xl);
}

.index-header h1 {
  margin-bottom: var(--spacing-sm);
}

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

/* Album Grid */
.album-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: var(--spacing-lg);
}

/* Album Card */
.album-card {
  display: block;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: #151515;
  border: 1px solid var(--color-border);
  transition: all 0.3s ease;
  box-shadow: 0 2px 8px var(--color-shadow);
}

.album-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.5);
  border-color: #3a3a3a;
}

.album-card-cover {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  background-color: var(--color-hover);
}

.album-card-content {
  padding: var(--spacing-md);
}

.album-card h2 {
  margin-bottom: var(--spacing-xs);
  font-size: var(--font-size-lg);
}

.album-card p {
  color: var(--color-text-secondary);
  font-size: 14px;
  margin-bottom: 0;
  line-height: 1.5;
}

/* Responsive Design */
@media (max-width: 640px) {
  :root {
    --font-size-xl: 24px;
    --font-size-lg: 18px;
  }

  .index-container {
    padding: var(--spacing-lg) var(--spacing-sm);
  }

  .album-list {
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
  }

  .album-card-content {
    padding: var(--spacing-sm);
  }
}

/* Utility Classes */
.text-center {
  text-align: center;
}

.hidden {
  display: none !important;
}