/**
 * Agust Islandia - Main Stylesheet
 * Optimized for maintainability and future enhancements
 */

/* ============================================================================
   CSS Variables - Centralized Theme & Colors
   ============================================================================ */
:root {
  /* Layout */
  --max-width: 820px;
  --spacing-xs: 4px;
  --spacing-sm: 8px;
  --spacing-md: 16px;
  --spacing-lg: 20px;
  --spacing-xl: 30px;
  --spacing-2xl: 40px;

  /* Colors - Primary */
  --color-primary-blue: #0048E0;
  --color-primary-purple: #732982;
  --color-primary-teal: #008080;

  /* Colors - Streaming Platforms */
  --color-spotify: #1db954;
  --color-spotify-hover: #1ed760;
  --color-apple: #fc3c44;
  --color-apple-hover: #ff4757;

  /* Colors - Backgrounds & Text */
  --color-bg-light: #ffffff;
  --color-bg-overlay: rgba(255, 255, 255, 0.95);
  --color-text-primary: #333333;
  --color-text-secondary: #666666;
  --color-text-tertiary: #444444;
  --color-border-light: #eeeeee;
  --color-border-subtle: rgba(240, 240, 240, 0.8);

  /* Colors - Decorative */
  --color-gold: #FFD700;
  --color-shadow: rgba(0, 0, 0, 0.1);
  --color-shadow-dark: rgba(0, 0, 0, 0.3);
  --color-shadow-tooltip: rgba(0, 0, 0, 0.9);

  /* Gradients */
  --gradient-bg: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  --gradient-pride: linear-gradient(45deg, var(--color-primary-purple), var(--color-primary-blue), var(--color-primary-teal));
  --gradient-pride-animated: linear-gradient(45deg, var(--color-primary-purple), var(--color-primary-blue));
  --gradient-underline: linear-gradient(90deg, var(--color-primary-blue), var(--color-primary-purple));
  --gradient-accent: linear-gradient(90deg, var(--color-primary-blue), var(--color-gold));
  --gradient-platform-border: linear-gradient(180deg, var(--color-primary-purple), var(--color-primary-blue), var(--color-primary-teal));

  /* Border Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 20px;

  /* Transitions */
  --transition-fast: 0.3s ease;
  --transition-normal: 0.4s ease;
  --transition-slow: 0.6s ease;
  --transition-cubic: cubic-bezier(0.175, 0.885, 0.32, 1.275);

  /* Typography */
  --font-stack: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --line-height-normal: 1.6;
  --line-height-tight: 1.25;
  --line-height-relaxed: 1.5;

  /* Z-index Scale */
  --z-tooltip: 999999;
  --z-tooltip-bubble: 999998;
  --z-bubble: 100;
  --z-header: 1;
  --z-skip-link: 9999;
}

/* ============================================================================
   Dark Mode Color Overrides
   ============================================================================ */
@media (prefers-color-scheme: dark) {
  :root {
    /* Backgrounds - Dark Mode */
    --color-bg-light: #252525;
    --color-bg-overlay: rgba(37, 37, 37, 0.95);

    /* Text - Dark Mode */
    --color-text-primary: #f5f5f5;
    --color-text-secondary: #d4d4d4;
    --color-text-tertiary: #e8e8e8;

    /* Borders - Dark Mode */
    --color-border-light: #404040;
    --color-border-subtle: rgba(255, 255, 255, 0.15);

    /* Shadows - Dark Mode (softer) */
    --color-shadow: rgba(0, 0, 0, 0.4);
    --color-shadow-dark: rgba(0, 0, 0, 0.6);
    --color-shadow-tooltip: rgba(0, 0, 0, 0.95);

    /* Background Gradient - Dark Mode */
    --gradient-bg: linear-gradient(135deg, #0f0f1e 0%, #1a1a2e 100%);

    /* Pride Gradient - Adjusted for Dark Mode (lighter for visibility) */
    --gradient-pride: linear-gradient(45deg, #b88eff, #5fa3ff, #00d4b8);
  }
}

/* Manual Theme Override via data-theme Attribute */
html[data-theme="dark"] {
  /* Dark mode colors */
  --color-bg-light: #252525;
  --color-bg-overlay: rgba(37, 37, 37, 0.95);
  --color-text-primary: #f5f5f5;
  --color-text-secondary: #d4d4d4;
  --color-text-tertiary: #e8e8e8;
  --color-border-light: #404040;
  --color-border-subtle: rgba(255, 255, 255, 0.15);
  --color-shadow: rgba(0, 0, 0, 0.4);
  --color-shadow-dark: rgba(0, 0, 0, 0.6);
  --color-shadow-tooltip: rgba(0, 0, 0, 0.95);
  --gradient-bg: linear-gradient(135deg, #0f0f1e 0%, #1a1a2e 100%);
  --gradient-pride: linear-gradient(45deg, #b88eff, #5fa3ff, #00d4b8);
}

html[data-theme="light"] {
  /* Light mode colors (explicit) */
  --color-bg-light: #ffffff;
  --color-bg-overlay: rgba(255, 255, 255, 0.95);
  --color-text-primary: #333333;
  --color-text-secondary: #666666;
  --color-text-tertiary: #444444;
  --color-border-light: #eeeeee;
  --color-border-subtle: rgba(240, 240, 240, 0.8);
  --color-shadow: rgba(0, 0, 0, 0.1);
  --color-shadow-dark: rgba(0, 0, 0, 0.3);
  --color-shadow-tooltip: rgba(0, 0, 0, 0.9);
  --gradient-bg: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  --gradient-pride: linear-gradient(45deg, var(--color-primary-purple), var(--color-primary-blue), var(--color-primary-teal));
}

/* ============================================================================
   Global Styles
   ============================================================================ */

html {
  color-scheme: light dark;
}

html,
body {
  margin: 0;
  padding: 0;
  font-family: var(--font-stack);
  line-height: var(--line-height-normal);
  color: var(--color-text-primary);
  background: var(--gradient-bg);
  min-height: 100vh;
  transition: background-color var(--transition-normal) ease, color var(--transition-normal) ease;
}

* {
  box-sizing: border-box;
}

/* ============================================================================
   Page Container
   ============================================================================ */

.page {
  max-width: var(--max-width);
  margin: var(--spacing-2xl) auto;
  padding: 0 var(--spacing-lg);
  background: var(--color-bg-overlay);
  backdrop-filter: blur(10px);
  border-radius: var(--radius-xl);
  box-shadow: 0 8px 32px var(--color-shadow);
  border: 1px solid rgba(255, 255, 255, 0.2);
  position: relative;
  overflow: hidden;
}

/* Animated background accent */
.page::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle, rgba(255, 215, 0, 0.1) 0%, transparent 70%);
  animation: subtle-rotate 20s linear infinite;
  pointer-events: none;
}

@keyframes subtle-rotate {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

/* ============================================================================
   Typography
   ============================================================================ */

h1,
h2,
h3,
h4,
h5,
h6 {
  margin: 0;
  line-height: var(--line-height-tight);
}

h1 {
  font-size: 2.2rem;
  background: var(--gradient-pride);
  background-size: 300% 300%;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  animation: gradient-shift 3s ease-in-out infinite;
  margin-bottom: var(--spacing-sm);
}

@keyframes gradient-shift {
  0%, 100% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
}

h2 {
  font-size: 1.5rem;
  color: var(--color-text-tertiary);
  margin-bottom: var(--spacing-md);
  border-bottom: 2px solid transparent;
  background: var(--gradient-accent) bottom repeat-x;
  background-size: 100% 2px;
  padding-bottom: var(--spacing-sm);
}

/* Light mode heading colors (explicit) */
html[data-theme="light"] h2 {
  color: #444444;
}

/* Dark mode heading colors */
@media (prefers-color-scheme: dark) {
  h1,
  h2 {
    color: #ffffff;
  }
}

html[data-theme="dark"] h1,
html[data-theme="dark"] h2 {
  color: #ffffff;
}

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

p:last-child {
  margin-bottom: 0;
}

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

header {
  text-align: center;
  margin-bottom: var(--spacing-2xl);
  padding: var(--spacing-2xl) var(--spacing-lg) var(--spacing-lg) var(--spacing-lg);
  position: relative;
  z-index: var(--z-header);
}

header img {
  display: block;
  margin: var(--spacing-lg) auto;
  border-radius: var(--radius-xl);
  box-shadow: 0 12px 40px var(--color-shadow-dark);
  max-width: 280px;
  max-height: 350px;
  width: auto;
  height: auto;
  transition: all var(--transition-normal) var(--transition-cubic);
  border: 3px solid transparent;
  background: var(--gradient-pride) border-box;
  background-clip: padding-box, border-box;
  object-fit: cover;
  /* Enable lazy loading */
  loading: lazy;
}

header img:hover {
  transform: scale(1.05) rotate(2deg);
  box-shadow: 0 20px 60px var(--color-shadow-dark);
}

/* Theme Toggle Button */
.theme-toggle {
  position: fixed;
  top: var(--spacing-lg);
  right: var(--spacing-lg);
  width: 44px;
  height: 44px;
  border-radius: var(--radius-lg);
  background: var(--color-primary-blue);
  border: 2px solid rgba(255, 255, 255, 0.2);
  cursor: pointer;
  padding: 0;
  color: white;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-normal) var(--transition-cubic);
  z-index: 10000;
  font-family: inherit;
}

.theme-toggle:hover {
  transform: scale(1.1);
  background: var(--color-primary-purple);
  box-shadow: 0 6px 20px var(--color-shadow-dark);
  border-color: rgba(255, 255, 255, 0.4);
}

.theme-toggle:focus {
  outline: 2px solid var(--color-gold);
  outline-offset: 2px;
}

.theme-toggle:active {
  transform: scale(0.95);
}

.theme-icon {
  width: 24px;
  height: 24px;
  display: block;
}

/* ============================================================================
   Sections
   ============================================================================ */

section {
  margin: var(--spacing-xl) 0;
  padding: 0 var(--spacing-sm);
  position: relative;
  z-index: var(--z-header);
}

/* ============================================================================
   Links
   ============================================================================ */

a {
  color: #0048E0;
  text-decoration: none;
  transition: all var(--transition-fast) ease;
  position: relative;
}

a:hover {
  color: var(--color-primary-purple);
}

/* Light mode link colors (explicit) */
html[data-theme="light"] a {
  color: #0048E0;
}

html[data-theme="light"] a:hover {
  color: var(--color-primary-purple);
}

/* Dark mode link colors */
@media (prefers-color-scheme: dark) {
  a {
    color: #6eb3ff;
  }

  a:hover {
    color: #a8d5ff;
  }
}

html[data-theme="dark"] a {
  color: #6eb3ff;
}

html[data-theme="dark"] a:hover {
  color: #a8d5ff;
}

a:not(.btn-icon):hover::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--gradient-underline);
  animation: link-glow var(--transition-fast) ease;
}

@keyframes link-glow {
  from { width: 0%; }
  to { width: 100%; }
}

/* ============================================================================
   Discography List
   ============================================================================ */

.discography {
  list-style: none;
  padding: 0;
  margin: var(--spacing-lg) 0;
  font-size: 1rem;
  overflow: visible;
}

.discography li {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: var(--spacing-md) var(--spacing-lg);
  border-bottom: 1px solid var(--color-border-subtle);
  flex-wrap: wrap;
  border-radius: var(--radius-lg);
  margin-bottom: var(--spacing-lg);
  background: linear-gradient(90deg, transparent 0%, rgba(255, 215, 0, 0.05) 50%, transparent 100%);
  transition: all var(--transition-fast) ease;
  position: relative;
  overflow: visible;
  z-index: 1;
}

.discography li:has(.info-bubble.active) {
  z-index: 1000000;
}

/* Left accent bar on hover */
.discography li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  height: 100%;
  width: 4px;
  background: var(--gradient-platform-border);
  transform: scaleY(0);
  transition: transform var(--transition-fast) ease;
}

.discography li:hover {
  transform: translateX(8px);
  background: linear-gradient(
    90deg,
    rgba(255, 215, 0, 0.1) 0%,
    rgba(115, 41, 130, 0.05) 50%,
    rgba(0, 76, 255, 0.1) 100%
  );
  box-shadow: 0 4px 20px var(--color-shadow);
}

.discography li:hover::before {
  transform: scaleY(1);
}

.discography li:last-child {
  border-bottom: none;
}

.discography .release {
  flex: 1 1 auto;
  font-weight: 500;
}

.release-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  flex-wrap: wrap;
  gap: var(--spacing-md);
}

/* ============================================================================
   Platform Icons & Buttons
   ============================================================================ */

.platforms {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.btn-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-lg);
  text-decoration: none;
  transition: all var(--transition-normal) var(--transition-cubic);
  outline-offset: 2px;
  position: relative;
  overflow: hidden;
  border: 2px solid rgba(255, 255, 255, 0.2);
  cursor: pointer;
}

.btn-icon::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: inherit;
  border-radius: inherit;
  opacity: 0;
  transition: opacity var(--transition-fast) ease;
}

.btn-icon:hover {
  transform: translateY(-4px) scale(1.1);
  box-shadow: 0 8px 25px var(--color-shadow-dark);
  border-color: rgba(255, 255, 255, 0.4);
}

.btn-icon:focus {
  outline: 2px solid var(--color-primary-blue);
}

/* Spotify Button */
.btn-icon.spotify {
  background: var(--color-spotify);
}

.btn-icon.spotify:hover {
  background: var(--color-spotify-hover);
  box-shadow: 0 8px 25px rgba(29, 185, 84, 0.4);
}

/* Apple Music Button */
.btn-icon.apple {
  background: var(--color-apple);
}

.btn-icon.apple:hover {
  background: var(--color-apple-hover);
  box-shadow: 0 8px 25px rgba(252, 60, 68, 0.4);
}

/* SVG Icons */
.icon-svg {
  width: 22px;
  height: 22px;
  display: block;
  filter: drop-shadow(0 1px 2px rgba(0, 0, 0, 0.3));
}

/* ============================================================================
   Info Bubbles & Tooltips
   ============================================================================ */

.info-bubble {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 20px;
  height: 20px;
  margin-left: var(--spacing-sm);
  background: var(--gradient-pride-animated);
  border-radius: 50%;
  color: var(--color-bg-light);
  font-size: 12px;
  font-weight: bold;
  cursor: pointer;
  transition: all var(--transition-fast) ease;
  position: relative;
  border: 1px solid rgba(255, 255, 255, 0.3);
  z-index: var(--z-bubble);
  /* Button reset */
  padding: 0;
  outline: none;
  font-family: inherit;
  background-color: transparent;
}

.info-bubble:focus,
.info-bubble:focus-visible {
  outline: 2px solid var(--color-primary-blue);
  outline-offset: 2px;
}

.info-bubble:hover {
  transform: scale(1.1);
  background: linear-gradient(45deg, var(--color-primary-blue), var(--color-primary-teal));
  box-shadow: 0 4px 12px var(--color-shadow-dark);
}

/* Dark mode info bubble styling */
@media (prefers-color-scheme: dark) {
  .info-bubble {
    background: linear-gradient(45deg, #7fb3ff, #00d4b8);
    color: #000000;
    border: 1px solid rgba(255, 255, 255, 0.5);
    box-shadow: 0 2px 8px rgba(127, 179, 255, 0.3);
  }

  .info-bubble:hover {
    background: linear-gradient(45deg, #a8d5ff, #00f0d8);
    box-shadow: 0 4px 16px rgba(127, 179, 255, 0.5);
  }
}

html[data-theme="dark"] .info-bubble {
  background: linear-gradient(45deg, #7fb3ff, #00d4b8);
  color: #000000;
  border: 1px solid rgba(255, 255, 255, 0.5);
  box-shadow: 0 2px 8px rgba(127, 179, 255, 0.3);
}

html[data-theme="dark"] .info-bubble:hover {
  background: linear-gradient(45deg, #a8d5ff, #00f0d8);
  box-shadow: 0 4px 16px rgba(127, 179, 255, 0.5);
}

.info-tooltip {
  position: absolute;
  bottom: calc(100% + 15px);
  left: 50%;
  transform: translateX(-50%);
  padding: var(--spacing-md) var(--spacing-lg);
  background: var(--color-shadow-tooltip);
  color: var(--color-bg-light);
  border-radius: var(--radius-md);
  font-size: 14px;
  line-height: var(--line-height-relaxed);
  width: 300px;
  max-width: calc(100vw - 40px);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition-fast) ease, visibility var(--transition-fast) ease, transform var(--transition-fast) ease;
  z-index: var(--z-tooltip);
  box-shadow: 0 8px 30px var(--color-shadow-dark);
  border: 1px solid rgba(255, 255, 255, 0.1);
  pointer-events: none;
  text-align: left;
  -webkit-font-smoothing: antialiased;
  -webkit-backface-visibility: hidden;
  backface-visibility: hidden;
  will-change: opacity, visibility, transform;
}

.info-tooltip::after {
  content: '';
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%);
  border: 6px solid transparent;
  border-top-color: var(--color-shadow-tooltip);
}

.info-bubble.active {
  z-index: var(--z-tooltip-bubble);
}

.info-bubble:hover .info-tooltip,
.info-bubble.active .info-tooltip {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transform: translateX(-50%) translateY(-5px);
}

/* Mobile inline collapsible content */
.mobile-info-content {
  display: none;
  padding: 0;
  margin-top: 0;
  background: rgba(255, 255, 255, 0.7);
  border-radius: var(--radius-lg);
  color: var(--color-text-tertiary);
  line-height: var(--line-height-relaxed);
  font-size: 0.9rem;
  border-left: 3px solid transparent;
  background-image: linear-gradient(rgba(255, 255, 255, 0.7), rgba(255, 255, 255, 0.7)),
                    var(--gradient-platform-border);
  background-origin: border-box;
  background-clip: padding-box, border-box;
  max-height: 0;
  overflow: hidden;
  transition: all var(--transition-normal) cubic-bezier(0.4, 0, 0.2, 1);
  transform-origin: top;
  opacity: 0;
}

.mobile-info-content.expanded {
  display: block;
  padding: var(--spacing-md) var(--spacing-lg);
  margin-top: var(--spacing-sm);
  max-height: 200px;
  opacity: 1;
  transform: translateY(0);
}

/* Dark mode styling for info bubbles and tooltips */
@media (prefers-color-scheme: dark) {
  .mobile-info-content {
    background: rgba(60, 60, 60, 0.9);
    background-image: linear-gradient(rgba(60, 60, 60, 0.9), rgba(60, 60, 60, 0.9)),
                      var(--gradient-platform-border);
    color: #ffffff;
  }

  .info-tooltip {
    background: rgba(50, 50, 50, 0.95);
    color: #ffffff;
    border: 1px solid rgba(255, 255, 255, 0.2);
  }

  .info-tooltip::after {
    border-top-color: rgba(50, 50, 50, 0.95);
  }
}

html[data-theme="dark"] .mobile-info-content {
  background: rgba(60, 60, 60, 0.9);
  background-image: linear-gradient(rgba(60, 60, 60, 0.9), rgba(60, 60, 60, 0.9)),
                    var(--gradient-platform-border);
  color: #ffffff;
}

html[data-theme="dark"] .info-tooltip {
  background: rgba(50, 50, 50, 0.95);
  color: #ffffff;
  border: 1px solid rgba(255, 255, 255, 0.2);
}

html[data-theme="dark"] .info-tooltip::after {
  border-top-color: rgba(50, 50, 50, 0.95);
}

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

footer {
  text-align: center;
  padding: var(--spacing-xl) 0 var(--spacing-2xl) 0;
  color: var(--color-text-secondary);
  font-size: 0.9rem;
  border-top: 1px solid var(--color-border-light);
  margin-top: var(--spacing-2xl);
}

/* ============================================================================
   Accessibility
   ============================================================================ */

.skip-link {
  position: absolute;
  top: -40px;
  left: 6px;
  background: var(--color-primary-blue);
  color: var(--color-bg-light);
  padding: var(--spacing-sm) var(--spacing-md);
  text-decoration: none;
  border-radius: var(--radius-sm);
  font-weight: bold;
  z-index: var(--z-skip-link);
  transition: top var(--transition-fast) ease;
}

.skip-link:focus {
  top: 6px;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* ============================================================================
   Responsive Design - Tablet & Mobile
   ============================================================================ */

@media (max-width: 640px) {
  .page {
    margin: var(--spacing-lg) auto;
    padding: 0 var(--spacing-md);
    border-radius: 0;
  }

  h1 {
    font-size: 1.8rem;
  }

  /* Adjust toggle button spacing on mobile */
  .theme-toggle {
    top: var(--spacing-sm);
    right: var(--spacing-sm);
    width: 40px;
    height: 40px;
  }

  .theme-icon {
    width: 20px;
    height: 20px;
  }

  header img {
    max-width: 240px;
  }

  .discography li {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--spacing-sm);
  }

  .platforms {
    align-self: flex-end;
  }

  /* Hide desktop tooltips on mobile */
  .info-tooltip {
    display: none !important;
  }

  /* Show mobile inline content */
  .mobile-info-content {
    display: block;
  }

  .discography li {
    flex-direction: column;
    align-items: stretch;
  }

  .release-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
  }

  .release-header .platforms {
    align-self: flex-end;
  }
}

/* Desktop: keep existing tooltip behavior */
@media (min-width: 641px) {
  .mobile-info-content {
    display: none !important;
  }
}