/* CSS Custom Properties for Theming */
:root {
  --color-bg: #ffffff;
  --color-text: #333333;
  --color-primary: #007acc;
  --color-secondary: #6c757d;
  --color-surface: #f8f9fa;
  --color-border: #e9ecef;
  --color-accent: #28a745;

  --font-family:
    -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-size-base: 16px;
  --font-size-large: 1.25rem;
  --font-size-xlarge: 2rem;

  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;

  --border-radius: 8px;
  --transition: all 0.3s ease;
}

/* Dark Theme */
[data-theme="dark"] {
  --color-bg: #1a1a1a;
  --color-text: #e9ecef;
  --color-primary: #4fc3f7;
  --color-secondary: #adb5bd;
  --color-surface: #2d3436;
  --color-border: #495057;
  --color-accent: #66bb6a;
}

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

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

/* Layout */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-sm);
}

/* Header */
.header {
  background-color: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 100;
}

.nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-sm) var(--spacing-md);
  max-width: 1200px;
  margin: 0 auto;
}

.nav-brand h1 {
  color: var(--color-primary);
  font-size: var(--font-size-large);
}

.nav-links {
  display: flex;
  list-style: none;
  align-items: center;
  gap: var(--spacing-md);
}

.nav-link {
  text-decoration: none;
  color: var(--color-text);
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--border-radius);
  transition: var(--transition);
}

.nav-link:hover,
.nav-link.active {
  background-color: var(--color-primary);
  color: white;
}

.theme-toggle {
  background: none;
  border: 2px solid var(--color-border);
  border-radius: var(--border-radius);
  padding: var(--spacing-xs);
  font-size: 1.2rem;
  cursor: pointer;
  transition: var(--transition);
}

.theme-toggle:hover {
  border-color: var(--color-primary);
  transform: scale(1.1);
}

/* Main Content */
.main {
  min-height: calc(100vh - 120px);
}

/* Hero Section */
.hero {
  background: linear-gradient(
    135deg,
    var(--color-surface) 0%,
    var(--color-bg) 100%
  );
  padding: var(--spacing-xl) var(--spacing-sm);
  text-align: center;
}

.hero-content {
  max-width: 800px;
  margin: 0 auto;
}

.hero-title {
  font-size: var(--font-size-xlarge);
  margin-bottom: var(--spacing-md);
  color: var(--color-primary);
}

.hero-description {
  font-size: var(--font-size-large);
  margin-bottom: var(--spacing-lg);
  color: var(--color-secondary);
}

.hero-actions {
  display: flex;
  gap: var(--spacing-sm);
  justify-content: center;
  flex-wrap: wrap;
}

/* Buttons */
.btn {
  display: inline-block;
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--border-radius);
  text-decoration: none;
  font-weight: 500;
  transition: var(--transition);
  cursor: pointer;
  border: 2px solid transparent;
}

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

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

.btn-secondary {
  background-color: transparent;
  border-color: var(--color-secondary);
  color: var(--color-secondary);
}

.btn-secondary:hover {
  background-color: var(--color-secondary);
  color: white;
}

/* About Section */
.about {
  padding: var(--spacing-xl) var(--spacing-sm);
}

.about h2 {
  font-size: var(--font-size-xlarge);
  margin-bottom: var(--spacing-lg);
  text-align: center;
  color: var(--color-primary);
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-xl);
  align-items: start;
}

.about-text p {
  margin-bottom: var(--spacing-sm);
  line-height: 1.8;
}

.about-skills h3 {
  margin-bottom: var(--spacing-sm);
  color: var(--color-primary);
}

.skills-list {
  list-style: none;
}

.skills-list li {
  padding: var(--spacing-xs) 0;
  border-bottom: 1px solid var(--color-border);
  transition: var(--transition);
}

.skills-list li:hover {
  color: var(--color-primary);
  padding-left: var(--spacing-xs);
}

/* Footer */
.footer {
  background-color: var(--color-surface);
  border-top: 1px solid var(--color-border);
  padding: var(--spacing-md);
  text-align: center;
  color: var(--color-secondary);
}

/* Audio Pages */
.audio-section {
  padding: var(--spacing-xl) var(--spacing-sm);
}

.audio-section h2 {
  font-size: var(--font-size-xlarge);
  margin-bottom: var(--spacing-lg);
  text-align: center;
  color: var(--color-primary);
}

.audio-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: var(--spacing-md);
  margin-top: var(--spacing-lg);
}

.audio-card {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
  padding: var(--spacing-md);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
  transition: var(--transition);
}

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

.audio-card h3 {
  color: var(--color-text);
  font-size: 1.1rem;
  margin: 0;
}

.progress-bar {
  width: 100%;
  height: 24px;
  background-color: var(--color-border);
  border-radius: var(--border-radius);
  overflow: hidden;
  position: relative;
  margin: var(--spacing-xs) 0;
}

.progress-fill {
  height: 100%;
  background: linear-gradient(
    90deg,
    var(--color-primary) 0%,
    var(--color-accent) 100%
  );
  transition: width 0.3s ease;
}

.progress-text {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-text);
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
}

.loading,
.no-tracks,
.error {
  text-align: center;
  color: var(--color-secondary);
  padding: var(--spacing-lg);
}

.error {
  color: #dc3545;
}

.player-section {
  padding: var(--spacing-xl) var(--spacing-sm);
  min-height: calc(100vh - 200px);
}

.player-controls {
  margin-bottom: var(--spacing-lg);
  display: flex;
  gap: var(--spacing-md);
  justify-content: center;
  flex-wrap: wrap;
}

.player-container {
  max-width: 600px;
  margin: 0 auto;
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
  padding: var(--spacing-xl);
  text-align: center;
}

.player-container h2 {
  color: var(--color-primary);
  margin-bottom: var(--spacing-lg);
}

#audio-player {
  width: 100%;
  margin: var(--spacing-lg) 0;
}

.player-info {
  margin-top: var(--spacing-md);
  color: var(--color-secondary);
  font-size: 0.9rem;
}

.track-id {
  word-break: break-all;
  font-family: monospace;
  font-size: 0.75rem;
  margin-top: var(--spacing-md);
  color: var(--color-text-secondary);
}

.track-description {
  font-size: 1rem;
  color: var(--color-text-secondary);
  line-height: 1.6;
  margin-top: var(--spacing-md);
  padding: var(--spacing-md);
  text-align: left;
  white-space: pre-wrap;
  word-wrap: break-word;
}

/* JSON Input Section */
.json-input-section {
  margin: var(--spacing-lg) 0;
  width: 100%;
}

.json-input {
  width: 100%;
  min-height: 200px;
  padding: var(--spacing-md);
  border: 2px solid var(--color-border);
  border-radius: var(--border-radius);
  background-color: var(--color-surface);
  color: var(--color-text);
  font-family: monospace;
  font-size: 0.9rem;
  resize: vertical;
  transition: var(--transition);
  margin-bottom: var(--spacing-md);
}

.json-input:focus {
  outline: none;
  border-color: var(--color-primary);
}

.json-input::placeholder {
  color: var(--color-secondary);
  opacity: 0.6;
}

.error-message {
  background-color: #dc3545;
  color: white;
  padding: var(--spacing-sm);
  border-radius: var(--border-radius);
  margin-top: var(--spacing-sm);
  text-align: center;
}

.generated-links {
  margin-top: var(--spacing-xl);
  padding-top: var(--spacing-xl);
  border-top: 2px solid var(--color-border);
}

.generated-links h3 {
  color: var(--color-primary);
  margin-bottom: var(--spacing-md);
  text-align: center;
}

.links-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: var(--spacing-md);
}

.player-link-input {
  width: 100%;
  padding: var(--spacing-sm);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
  background-color: var(--color-bg);
  color: var(--color-text);
  font-family: monospace;
  font-size: 0.85rem;
  cursor: pointer;
  transition: var(--transition);
}

.player-link-input:focus {
  outline: none;
  border-color: var(--color-primary);
  background-color: var(--color-surface);
}

.player-link-input:hover {
  border-color: var(--color-primary);
}

/* Responsive Design */
@media (max-width: 768px) {
  .nav {
    flex-direction: column;
    gap: var(--spacing-sm);
  }

  .nav-links {
    gap: var(--spacing-sm);
  }

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

  .hero-title {
    font-size: 1.75rem;
  }

  .hero-actions {
    flex-direction: column;
    align-items: center;
  }

  .about-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
  }

  .audio-list {
    grid-template-columns: 1fr;
  }

  .player-container {
    padding: var(--spacing-md);
  }
}