/* ========================================
   CSS Variables
   ======================================== */

:root {
  /* Typography */
  --font-display: 'Righteous', cursive;
  --font-body: 'Outfit', sans-serif;
  --font-size-base: 18px;
  --line-height-base: 1.7;

  /* Colors - Vibrant Palette */
  --color-orange: #FF6B35;
  --color-magenta: #E91E63;
  --color-teal: #00BCD4;
  --color-yellow: #FFD700;
  --color-purple: #9C27B0;
  --color-lime: #76FF03;
  --color-blue: #2196F3;
  --color-coral: #FF5252;
  --color-green: #00E676;
  --color-pink: #FF4081;

  /* Neutrals */
  --color-bg: #FAFAFA;
  --color-text-dark: #212121;
  --color-text-light: #FFFFFF;

  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 2rem;
  --spacing-lg: 4rem;
  --spacing-xl: 6rem;

  /* Layout */
  --container-max: 1400px;
  --content-max: 1200px;
  --text-max: 1000px;

  /* Transitions */
  --transition-fast: 200ms ease;
  --transition-medium: 350ms ease;
  --transition-slow: 500ms ease;

  /* Breakpoints (for reference) */
  --bp-mobile: 768px;
  --bp-tablet: 1024px;
}

/* ========================================
   Reset and Base Styles
   ======================================== */

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

html {
  font-size: var(--font-size-base);
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  line-height: var(--line-height-base);
  color: var(--color-text-dark);
  background: var(--color-bg);
  background-image:
    repeating-linear-gradient(
      45deg,
      transparent,
      transparent 10px,
      rgba(0,0,0,0.01) 10px,
      rgba(0,0,0,0.01) 20px
    );
  overflow-x: hidden;
}

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

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

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

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

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 400;
  line-height: 1.2;
}

h1 {
  font-size: clamp(2.5rem, 5vw, 4rem);
}

h2 {
  font-size: clamp(2rem, 4vw, 3rem);
}

h3 {
  font-size: clamp(1.5rem, 3vw, 2rem);
}

p {
  margin-bottom: 1em;
}

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

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

:focus-visible {
  outline: 3px solid var(--color-blue);
  outline-offset: 3px;
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

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

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

.site-header {
  padding: var(--spacing-lg) var(--spacing-md);
  background: linear-gradient(135deg, var(--color-purple) 0%, var(--color-magenta) 100%);
  text-align: center;
  color: var(--color-text-light);
}

.header-content {
  max-width: var(--container-max);
  margin: 0 auto;
}

.banner-image {
  max-width: 600px;
  margin: 0 auto var(--spacing-md);
  border-radius: 12px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
}

.site-title {
  margin-bottom: var(--spacing-sm);
  text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.2);
}

.site-intro {
  max-width: var(--text-max);
  margin: 0 auto;
  font-size: 1.1rem;
  opacity: 0.95;
}

/* ========================================
   Student Navigation
   ======================================== */

.student-nav {
  position: sticky;
  top: 0;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 2px solid rgba(0, 0, 0, 0.1);
  padding: var(--spacing-sm);
  z-index: 100;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
}

.nav-content {
  max-width: var(--container-max);
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-xs);
  justify-content: center;
}

.nav-link {
  padding: 0.5rem 1rem;
  background: var(--color-teal);
  color: white;
  border-radius: 20px;
  font-weight: 500;
  transition: transform var(--transition-fast),
              box-shadow var(--transition-fast);
  min-height: 44px;
  display: flex;
  align-items: center;
}

.nav-link:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.nav-link:active {
  transform: translateY(0);
}

/* ========================================
   Gallery Grid
   ======================================== */

.gallery-grid {
  max-width: var(--container-max);
  margin: var(--spacing-lg) auto;
  padding: 0 var(--spacing-md);
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: var(--spacing-md);
}

@media (min-width: 768px) {
  .gallery-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .gallery-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* ========================================
   Student Cards
   ======================================== */

.student-card {
  padding: var(--spacing-md);
  border-radius: 16px;
  cursor: pointer;
  transition: transform var(--transition-medium),
              box-shadow var(--transition-medium);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
  min-height: 300px;
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;

  /* Staggered animation - set via JS */
  opacity: 0;
  animation: cardFadeIn var(--transition-slow) forwards;
}

@keyframes cardFadeIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.student-card:hover {
  transform: translateY(-8px) scale(1.02);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.2);
}

.student-card:active {
  transform: translateY(-4px) scale(1.01);
}

/* Card color variants - applied via JS */
.student-card.color-orange { background: var(--color-orange); }
.student-card.color-magenta { background: var(--color-magenta); }
.student-card.color-teal { background: var(--color-teal); }
.student-card.color-yellow { background: var(--color-yellow); }
.student-card.color-purple { background: var(--color-purple); }
.student-card.color-lime { background: var(--color-lime); }
.student-card.color-blue { background: var(--color-blue); }
.student-card.color-coral { background: var(--color-coral); }
.student-card.color-green { background: var(--color-green); }
.student-card.color-pink { background: var(--color-pink); }

/* Text color based on background */
.student-card.color-yellow,
.student-card.color-lime {
  color: var(--color-text-dark);
}

.student-card.color-orange,
.student-card.color-magenta,
.student-card.color-teal,
.student-card.color-purple,
.student-card.color-blue,
.student-card.color-coral,
.student-card.color-green,
.student-card.color-pink {
  color: var(--color-text-light);
}

.student-name {
  font-size: clamp(2rem, 4vw, 3rem);
  margin-bottom: var(--spacing-xs);
  line-height: 1.1;
}

.project-title {
  font-family: var(--font-body);
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: var(--spacing-sm);
  opacity: 0.9;
}

.project-type-badge {
  display: inline-block;
  padding: 0.25rem 0.75rem;
  background: rgba(255, 255, 255, 0.2);
  border-radius: 12px;
  font-size: 0.85rem;
  font-weight: 500;
  margin-bottom: var(--spacing-sm);
  backdrop-filter: blur(5px);
}

.student-card.color-yellow .project-type-badge,
.student-card.color-lime .project-type-badge {
  background: rgba(0, 0, 0, 0.1);
}

.card-excerpt {
  font-size: 0.95rem;
  line-height: 1.6;
  opacity: 0.9;
  flex-grow: 1;
  overflow: hidden;
  display: -webkit-box;
  -webkit-line-clamp: 4;
  -webkit-box-orient: vertical;
}

/* ========================================
   Group Work Section
   ======================================== */

.group-work {
  max-width: var(--container-max);
  margin: var(--spacing-xl) auto;
  padding: var(--spacing-lg) var(--spacing-md);
  border-top: 4px solid var(--color-purple);
}

.group-work h2 {
  text-align: center;
  margin-bottom: var(--spacing-sm);
  color: var(--color-purple);
}

.group-work-intro {
  text-align: center;
  max-width: var(--text-max);
  margin: 0 auto var(--spacing-lg);
  font-size: 1.1rem;
  color: rgba(0, 0, 0, 0.7);
}

.group-work-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-md);
  max-width: 900px;
  margin: 0 auto;
}

.group-card {
  padding: var(--spacing-md);
  background: var(--color-blue);
  color: var(--color-text-light);
  border-radius: 16px;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  transition: transform var(--transition-medium),
              box-shadow var(--transition-medium);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
  min-height: 250px;
}

.group-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.2);
}

.group-card-icon {
  font-size: 3rem;
  margin-bottom: var(--spacing-sm);
}

.group-card h3 {
  margin-bottom: var(--spacing-sm);
}

.group-card p {
  flex-grow: 1;
  opacity: 0.9;
  margin-bottom: var(--spacing-md);
}

.group-card-cta {
  font-weight: 700;
  padding: 0.75rem 1.5rem;
  background: rgba(255, 255, 255, 0.2);
  border-radius: 25px;
  display: inline-block;
  backdrop-filter: blur(5px);
  transition: background var(--transition-fast);
}

.group-card:hover .group-card-cta {
  background: rgba(255, 255, 255, 0.3);
}

/* ========================================
   View Container (State Management)
   ======================================== */

.view-container {
  display: none;
  opacity: 0;
  transition: opacity var(--transition-medium);
}

.view-container.active {
  display: block;
  opacity: 1;
}

/* ========================================
   Project Navigation
   ======================================== */

.project-nav {
  position: sticky;
  top: 0;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 2px solid rgba(0, 0, 0, 0.1);
  padding: var(--spacing-sm) var(--spacing-md);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--spacing-md);
  z-index: 100;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
}

.nav-btn {
  padding: 0.75rem 1.5rem;
  background: var(--color-teal);
  color: white;
  border-radius: 25px;
  font-weight: 600;
  transition: transform var(--transition-fast),
              background var(--transition-fast);
  min-height: 44px;
  white-space: nowrap;
}

.nav-btn:hover {
  background: var(--color-blue);
  transform: translateY(-2px);
}

.nav-btn:active {
  transform: translateY(0);
}

.project-nav-title {
  font-size: 1.5rem;
  text-align: center;
  flex-grow: 1;
}

.project-nav-controls {
  display: flex;
  gap: var(--spacing-sm);
}

@media (max-width: 768px) {
  .project-nav {
    flex-wrap: wrap;
  }

  .project-nav-title {
    order: -1;
    width: 100%;
    font-size: 1.2rem;
  }

  .back-btn {
    flex-grow: 1;
  }

  .project-nav-controls {
    flex-grow: 1;
    justify-content: flex-end;
  }
}

/* ========================================
   Project Content
   ======================================== */

.project-content {
  max-width: var(--content-max);
  margin: var(--spacing-lg) auto;
  padding: 0 var(--spacing-md) var(--spacing-xl);
  animation: projectFadeIn var(--transition-medium) forwards;
}

@keyframes projectFadeIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.project-hero {
  text-align: center;
  margin-bottom: var(--spacing-lg);
  padding-bottom: var(--spacing-md);
  border-bottom: 3px solid var(--color-purple);
}

.project-hero h1 {
  margin-bottom: var(--spacing-xs);
}

.project-hero .project-title {
  font-size: 1.5rem;
  color: rgba(0, 0, 0, 0.6);
  margin-bottom: var(--spacing-sm);
}

.project-hero .project-type-badge {
  background: var(--color-purple);
  color: white;
  padding: 0.5rem 1rem;
  font-size: 1rem;
}

.project-section {
  margin-bottom: var(--spacing-lg);
}

.project-section h2 {
  margin-bottom: var(--spacing-md);
  color: var(--color-purple);
}

.project-section.text-section {
  max-width: var(--text-max);
}

.project-section p {
  font-size: 1.05rem;
  line-height: 1.8;
  margin-bottom: 1.5em;
}

/* ========================================
   Media Display
   ======================================== */

.media-container {
  margin-bottom: var(--spacing-lg);
}

.media-item {
  margin-bottom: var(--spacing-md);
}

.media-item img,
.media-item video {
  max-width: 100%;
  border-radius: 12px;
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.15);
}

.media-item.linked {
  position: relative;
  cursor: pointer;
}

.media-item.linked::after {
  content: 'View Live Project →';
  position: absolute;
  bottom: 20px;
  right: 20px;
  background: rgba(0, 0, 0, 0.8);
  color: white;
  padding: 0.75rem 1.25rem;
  border-radius: 25px;
  font-weight: 600;
  opacity: 0;
  transition: opacity var(--transition-fast);
  pointer-events: none;
}

.media-item.linked:hover::after {
  opacity: 1;
}

.media-item.linked:hover img {
  transform: scale(1.02);
  transition: transform var(--transition-medium);
}

.media-item a {
  display: block;
}

/* Audio Player Styling */
.media-item audio {
  width: 100%;
  margin: var(--spacing-sm) 0;
  border-radius: 25px;
  filter:
    sepia(20%)
    saturate(70%)
    grayscale(0%)
    contrast(99%)
    invert(12%)
    hue-rotate(315deg);
}

/* Video Player */
.media-item video {
  width: 100%;
  max-height: 600px;
}

.media-caption {
  margin-top: var(--spacing-xs);
  font-style: italic;
  color: rgba(0, 0, 0, 0.6);
  font-size: 0.9rem;
}

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

@media (max-width: 768px) {
  :root {
    --font-size-base: 16px;
    --spacing-md: 1.5rem;
    --spacing-lg: 3rem;
    --spacing-xl: 4rem;
  }

  .site-header {
    padding: var(--spacing-md) var(--spacing-sm);
  }

  .banner-image {
    max-width: 100%;
  }

  .student-nav {
    padding: var(--spacing-xs);
  }

  .nav-link {
    font-size: 0.9rem;
    padding: 0.4rem 0.8rem;
  }

  .gallery-grid {
    padding: 0 var(--spacing-sm);
    gap: var(--spacing-sm);
  }

  .student-card {
    padding: var(--spacing-sm);
    min-height: 250px;
  }

  .student-name {
    font-size: 2rem;
  }

  .group-work {
    padding: var(--spacing-md) var(--spacing-sm);
  }

  .group-work-cards {
    grid-template-columns: 1fr;
  }

  .project-content {
    padding: 0 var(--spacing-sm) var(--spacing-lg);
  }

  .project-hero h1 {
    font-size: 2rem;
  }

  .project-section {
    margin-bottom: var(--spacing-md);
  }

  .media-item.linked::after {
    bottom: 10px;
    right: 10px;
    font-size: 0.85rem;
    padding: 0.5rem 1rem;
  }
}

/* Small mobile */
@media (max-width: 480px) {
  .student-name {
    font-size: 1.75rem;
  }

  .project-title {
    font-size: 1rem;
  }

  .card-excerpt {
    font-size: 0.9rem;
    -webkit-line-clamp: 3;
  }

  .nav-btn {
    padding: 0.6rem 1rem;
    font-size: 0.9rem;
  }

  .project-nav-controls .nav-btn {
    padding: 0.6rem 0.8rem;
    font-size: 0.85rem;
  }
}

/* ========================================
   Print Styles
   ======================================== */

@media print {
  .student-nav,
  .project-nav,
  .group-work,
  .nav-btn {
    display: none;
  }

  .view-container {
    display: block !important;
    opacity: 1 !important;
  }

  body {
    background: white;
  }

  .student-card,
  .project-content {
    page-break-inside: avoid;
  }
}

/* Make project images uniform size */
.media-item img {
  width: 100%;
  max-width: 600px;
  height: 400px;
  object-fit: contain;
  background: #f5f5f5;
  margin: 0 auto;
}

.media-item.linked img {
  cursor: pointer;
}

/* Custom Audio Player Styling */
.audio-item {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  padding: var(--spacing-md);
  border-radius: 16px;
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.15);
}

.audio-title {
  color: white;
  font-family: var(--font-display);
  font-size: 1.3rem;
  margin-bottom: var(--spacing-sm);
  text-align: center;
  text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
}

.media-item audio {
  width: 100%;
  height: 54px;
  border-radius: 12px;
  outline: none;
}

/* Custom audio controls styling */
.media-item audio::-webkit-media-controls-panel {
  background: rgba(255, 255, 255, 0.95);
  border-radius: 12px;
}

.media-item audio::-webkit-media-controls-play-button,
.media-item audio::-webkit-media-controls-pause-button {
  background: var(--color-purple);
  border-radius: 50%;
}

.media-item audio::-webkit-media-controls-current-time-display,
.media-item audio::-webkit-media-controls-time-remaining-display {
  color: #333;
  text-shadow: none;
}

.media-item audio::-webkit-media-controls-timeline {
  border-radius: 25px;
  background: rgba(0, 0, 0, 0.1);
}

/* Firefox */
.media-item audio::-moz-range-track {
  background: rgba(0, 0, 0, 0.1);
  border-radius: 25px;
}

.media-item audio::-moz-range-thumb {
  background: var(--color-purple);
  border-radius: 50%;
}