/* ========================================
   CSS Custom Properties (Dark Theme)
   ======================================== */

:root {
  /* Dark backgrounds */
  --bg-primary: #0d0d0d;
  --bg-secondary: #1a1a1a;
  --bg-tertiary: #2a2a2a;

  /* Text colors */
  --text-primary: #ffffff;
  --text-secondary: #b0b0b0;
  --text-muted: #808080;

  /* Accent colors (stoner rock aesthetic) */
  --accent-orange: #d84315;
  --accent-red: #c62828;
  --accent-yellow: #f9a825;

  /* Interactive elements */
  --interactive-hover: #3a3a3a;
  --interactive-active: #4a4a4a;

  /* Borders */
  --border-color: #404040;

  /* Spacing */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;

  /* Typography */
  --font-family-base: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-family-heading: "Helvetica Neue", Arial, sans-serif;

  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 2rem;
  --font-size-4xl: 2.5rem;

  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-bold: 700;

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

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-normal: 250ms ease;
  --transition-slow: 350ms ease;
}

/* ========================================
   Reset & Base Styles
   ======================================== */

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  background-color: var(--bg-primary);
  color: var(--text-primary);
  font-family: var(--font-family-base);
  font-size: var(--font-size-base);
  line-height: 1.6;
  min-height: 100vh;
}

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

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-family-heading);
  font-weight: var(--font-weight-bold);
  line-height: 1.2;
  margin-bottom: var(--spacing-md);
}

h1 {
  font-size: var(--font-size-4xl);
}

h2 {
  font-size: var(--font-size-3xl);
}

h3 {
  font-size: var(--font-size-2xl);
}

h4 {
  font-size: var(--font-size-xl);
}

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

a {
  color: var(--accent-orange);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--accent-yellow);
}

a:focus {
  outline: 2px solid var(--accent-orange);
  outline-offset: 2px;
}

ul, ol {
  margin-bottom: var(--spacing-md);
  padding-left: var(--spacing-lg);
}

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

em {
  font-style: italic;
}

strong {
  font-weight: var(--font-weight-bold);
}

/* ========================================
   Layout Grid
   ======================================== */

body {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: var(--spacing-xl) var(--spacing-md);
}

section {
  width: 100%;
  max-width: 1200px;
  margin-bottom: var(--spacing-2xl);
}

#album-section {
  background-color: var(--bg-secondary);
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
}

#about-section {
  background-color: var(--bg-secondary);
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
}

/* ========================================
   Section Headings
   ======================================== */

.section-heading {
  color: var(--text-primary);
  font-size: var(--font-size-3xl);
  font-weight: var(--font-weight-bold);
  margin-bottom: var(--spacing-xl);
  text-align: center;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

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

.hidden {
  display: none !important;
}

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

/* ========================================
   Modal / Lightbox
   ======================================== */

.modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: center;
  animation: fadeIn 0.2s ease;
}

.modal-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.95);
  cursor: pointer;
}

.modal-content {
  position: relative;
  z-index: 10000;
  max-width: 90vw;
  max-height: 90vh;
  display: flex;
  align-items: center;
  justify-content: center;
  animation: zoomIn 0.3s ease;
}

.modal-image {
  max-width: 100%;
  max-height: 90vh;
  object-fit: contain;
  border-radius: var(--radius-lg);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.8);
  cursor: pointer;
}

@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

@keyframes zoomIn {
  from {
    transform: scale(0.8);
    opacity: 0;
  }
  to {
    transform: scale(1);
    opacity: 1;
  }
}

/* Make album cover and band photo clickable */
.album-cover-image,
.band-photo-image {
  cursor: pointer;
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

.album-cover-image:hover,
.band-photo-image:hover {
  transform: scale(1.02);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.6);
}

/* ========================================
   Intro Button
   ======================================== */

.intro-button-container {
  display: flex;
  justify-content: center;
  margin-bottom: var(--spacing-xl);
}

.intro-btn {
  background: var(--accent-orange);
  border: none;
  border-radius: var(--radius-md);
  padding: var(--spacing-sm) var(--spacing-lg);
  color: var(--text-primary);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-medium);
  cursor: pointer;
  transition: all var(--transition-fast);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

.intro-btn:hover {
  background: var(--accent-yellow);
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(0, 0, 0, 0.4);
}

.intro-btn:active {
  transform: translateY(0);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}

.intro-btn:focus {
  outline: 2px solid var(--accent-orange);
  outline-offset: 2px;
}

/* ========================================
   Intro Modal
   ======================================== */

/* Lighter overlay for intro modal */
.intro-modal .modal-overlay {
  background: rgba(0, 0, 0, 0.6);
}

.intro-modal-content {
  max-width: 800px;
  max-height: 90vh;
  background: var(--bg-secondary);
  border-radius: var(--radius-lg);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.8);
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.intro-modal-header {
  background: var(--bg-tertiary);
  padding: var(--spacing-lg);
  border-bottom: 2px solid var(--accent-orange);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--spacing-md);
}

.intro-modal-header h2 {
  color: var(--accent-orange);
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-bold);
  margin: 0;
  line-height: 1.3;
}

.close-modal-btn {
  background: transparent;
  border: none;
  color: var(--text-primary);
  font-size: 2rem;
  line-height: 1;
  cursor: pointer;
  padding: 0;
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
  flex-shrink: 0;
}

.close-modal-btn:hover {
  background: var(--accent-orange);
  color: var(--bg-primary);
}

.close-modal-btn:focus {
  outline: 2px solid var(--accent-orange);
  outline-offset: 2px;
}

.intro-modal-body {
  padding: var(--spacing-xl);
  overflow-y: auto;
  color: var(--text-secondary);
  line-height: 1.8;
}

.intro-modal-body p {
  margin-bottom: var(--spacing-lg);
  text-align: justify;
}

.intro-modal-body p:last-child {
  margin-bottom: 0;
}

/* Scrollbar styling for intro modal */
.intro-modal-body::-webkit-scrollbar {
  width: 10px;
}

.intro-modal-body::-webkit-scrollbar-track {
  background: var(--bg-tertiary);
  border-radius: var(--radius-sm);
}

.intro-modal-body::-webkit-scrollbar-thumb {
  background: var(--accent-orange);
  border-radius: var(--radius-sm);
}

.intro-modal-body::-webkit-scrollbar-thumb:hover {
  background: var(--accent-yellow);
}

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

#album-header {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  margin-bottom: var(--spacing-2xl);
}

.album-cover-container {
  margin-bottom: var(--spacing-lg);
  width: 100%;
}

.album-cover-image {
  width: 100%;
  height: 480px;
  object-fit: cover;
  object-position: top;
  border-radius: var(--radius-md);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.5);
}

.album-info {
  width: 100%;
}

#album-title {
  color: var(--text-primary);
  font-size: var(--font-size-3xl);
  font-weight: var(--font-weight-bold);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--spacing-sm);
}

#album-artist {
  color: var(--accent-orange);
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-medium);
  margin-bottom: var(--spacing-xs);
}

#album-year {
  color: var(--text-muted);
  font-size: var(--font-size-lg);
  margin-bottom: 0;
}

/* ========================================
   Band Photo & Bio (will be detailed in T043-T045)
   ======================================== */

.band-content {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xl);
}

.band-photo-container {
  text-align: center;
}

.band-photo-image {
  max-width: 100%;
  height: auto;
  border-radius: var(--radius-md);
}

.band-bio-container {
  color: var(--text-secondary);
}

.band-name {
  color: var(--text-primary);
  font-size: var(--font-size-3xl);
  margin-bottom: var(--spacing-lg);
}

.bio-content h4 {
  color: var(--accent-orange);
  font-size: var(--font-size-xl);
  margin-top: var(--spacing-lg);
  margin-bottom: var(--spacing-md);
}

.bio-content p {
  color: var(--text-secondary);
  line-height: 1.8;
}

.discography-list {
  list-style: none;
  padding-left: 0;
}

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

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

.discography-list em {
  color: var(--text-primary);
}

.discography-list strong {
  color: var(--accent-orange);
}