:root {
  --bg: #ffffff;
  --bg-secondary: #f8f9fa;
  --text: #1a1a1a;
  --text-secondary: #555555;
  --accent: #2563eb; /* Royal Blue */
  --accent-light: #eff6ff;
  --border: #e5e7eb;
  --glass: rgba(255, 255, 255, 0.7);
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Inter", system-ui, -apple-system, sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
  overflow-x: hidden;
}

/* Dynamic Animated Background */
.animated-bg {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  z-index: -1;
  overflow: hidden;
  background: radial-gradient(circle at 50% 50%, #ffffff 0%, #f0f4ff 100%);
}

.note {
  position: absolute;
  color: rgba(37, 99, 235, 0.05); /* Very faint blue */
  font-size: 4rem;
  user-select: none;
  animation: float linear infinite;
}

.blob {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  z-index: -1;
  opacity: 0.6;
  animation: drift ease-in-out infinite alternate;
}

.blob-1 {
  top: -10%;
  left: -10%;
  width: 600px;
  height: 600px;
  background: #e0e7ff; /* Indigo tint */
  animation-duration: 25s;
}

.blob-2 {
  bottom: -10%;
  right: -10%;
  width: 500px;
  height: 500px;
  background: #dbeafe; /* Blue tint */
  animation-duration: 30s;
}

@keyframes float {
  0% { transform: translateY(120vh) rotate(0deg); opacity: 0; }
  10% { opacity: 1; }
  90% { opacity: 1; }
  100% { transform: translateY(-20vh) rotate(360deg); opacity: 0; }
}

@keyframes drift {
  from { transform: translate(0, 0); }
  to { transform: translate(50px, 50px); }
}

/* Typography */
h1, h2, h3, h4 {
  font-family: "Outfit", sans-serif;
  color: #111;
  margin-top: 0;
}

a {
  color: var(--accent);
  text-decoration: none;
  transition: 0.2s;
}

a:hover {
  text-decoration: underline;
}

/* Layout */
.container {
  max-width: 95%;
  margin: 0 auto;
  padding: 0 40px 80px;
}

/* Header */
.hero {
  text-align: center;
  padding: 80px 20px 60px;
}

.logo-container {
  margin-bottom: 2rem;
}

.project-logo {
  max-width: 600px;
  width: 90%;
  height: auto;
  filter: drop-shadow(0 0 20px rgba(94, 106, 210, 0.2));
}

.subtitle {
  font-size: 1.5rem;
  font-weight: 300;
  color: var(--text-secondary);
  margin-bottom: 2rem;
}

.meta {
  color: var(--text-secondary);
  font-weight: 500;
}

.links {
  margin-top: 30px;
  display: flex;
  justify-content: center;
  gap: 12px;
  flex-wrap: wrap;
}

.chip {
  background: white;
  border: 1px solid var(--border);
  padding: 8px 16px;
  border-radius: 99px;
  font-size: 0.9rem;
  font-weight: 500;
  box-shadow: var(--shadow-sm);
  display: flex;
  align-items: center;
  gap: 6px;
  color: var(--text);
  text-decoration: none !important;
}

.chip:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  background: var(--bg-secondary);
}

/* Nav */
.nav {
  display: flex;
  justify-content: center;
  gap: 24px;
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(10px);
  padding: 12px 24px;
  border-radius: 99px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-md);
  width: fit-content;
  margin: 0 auto 40px;
  position: sticky;
  top: 20px;
  z-index: 100;
  flex-wrap: wrap;
}

.nav a {
  color: var(--text-secondary);
  font-weight: 500;
  font-size: 0.95rem;
  text-decoration: none !important;
  padding: 6px 10px;
  border-radius: 999px;
}

.nav a:hover, .nav a.active {
  color: var(--accent);
  background: var(--accent-light);
}

.architecture-panel {
  box-shadow: none;
  background: transparent;
  border: none;
  padding: 10px 0 0;
}

/* Sections */
.section {
  margin-bottom: 80px;
  scroll-margin-top: 100px;
}

.section-title {
  font-size: 2rem;
  border-left: 5px solid var(--accent);
  padding-left: 16px;
  margin-bottom: 24px;
}

.glass-panel, .glass {
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(12px);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 30px;
  box-shadow: var(--shadow-sm);
}

/* Abstract & Architecture */
.text-content {
  font-size: 1.1rem;
  text-align: justify;
  color: #333;
}

.architecture-img {
  width: 100%;
  max-width: 1000px;
  border-radius: 8px;
  display: block;
  margin: 0 auto;
  box-shadow: var(--shadow-md);
}

.figure-caption {
  text-align: center;
  color: var(--text-secondary);
  margin-top: 12px;
  font-size: 0.9rem;
}

/* Tables */
h3.subsection-title {
  font-size: 1.4rem;
  margin: 40px 0 20px;
  color: #333;
  display: flex;
  align-items: center;
  gap: 10px;
}

.lang-badge {
  font-size: 1.1rem;
  font-weight: 600;
  background: var(--accent);
  color: white;
  padding: 6px 14px;
  border-radius: 6px;
  vertical-align: middle;
  margin-right: 8px;
  letter-spacing: 0.02em;
}

.table-wrapper {
  overflow-x: auto;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: white;
  box-shadow: var(--shadow-sm);
  margin-bottom: 30px;
}

table {
  width: 100%;
  border-collapse: collapse;
  min-width: 800px;
}

th, td {
  padding: 12px 10px;
  text-align: left;
  border-bottom: 1px solid var(--border);
  vertical-align: middle;
}

th {
  background: var(--bg-secondary);
  font-weight: 600;
  color: #333;
  white-space: nowrap;
}

tr:last-child td {
  border-bottom: none;
}

.col-info {
  width: 260px;
  min-width: 240px;
  background: #fafafa;
  border-right: 1px solid var(--border);
  position: sticky;
  left: 0;
  z-index: 5;
}

.text-sample {
  font-family: serif;
  font-style: italic;
  font-size: 0.9rem;
  color: #444;
  margin-bottom: 12px;
  line-height: 1.4;
  background: #eee;
  padding: 8px;
  border-radius: 4px;
}

.audio-group {
  margin-bottom: 8px;
}

.audio-label {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-secondary);
  margin-bottom: 4px;
  display: block;
}

/* Custom Audio Player Styling */
audio {
  height: 32px;
  width: 100%;
}

.audio-missing {
  font-size: 0.85rem;
  color: var(--text-secondary);
  padding: 8px 0;
}

.col-model {
  min-width: 160px;
  text-align: center;
  vertical-align: middle;
}

.audio-stack {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
}

.audio-caption {
  font-size: 0.75rem;
  color: var(--text-secondary);
  text-transform: none;
  letter-spacing: 0.02em;
}

.col-model .audio-label {
  display: none; /* Hide label in model columns as header explains it */
}

/* Long Context Player */
.player-container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 30px;
  height: 450px;
  margin-top: 20px;
}

.player-left {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  background: linear-gradient(135deg, #f0f4ff, #e0e7ff);
  border-radius: 16px;
  padding: 20px;
  box-shadow: inset 0 0 20px rgba(0,0,0,0.05);
}

.vinyl-icon {
  width: 180px;
  height: 180px;
  margin-bottom: 30px;
  border-radius: 50%;
  background: conic-gradient(from 0deg, #333, #111, #333);
  position: relative;
  box-shadow: 0 10px 30px rgba(0,0,0,0.3);
  animation: spin 5s linear infinite;
  animation-play-state: paused;
}

.vinyl-icon::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 35%; 
    height: 35%;
    border-radius: 50%;
    background: var(--accent);
}

.vinyl-icon::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 8px;
  height: 8px;
  background: white;
  border-radius: 50%;
}

.playing .vinyl-icon {
  animation-play-state: running;
}

@keyframes spin {
  100% { transform: rotate(360deg); }
}

.lyrics-container {
  overflow-y: auto;
  height: 100%;
  padding: 20px;
  background: #fff;
  border-radius: 16px;
  border: 1px solid var(--border);
  text-align: center;
  position: relative;
  scroll-behavior: smooth;
}

.lyric-line {
  padding: 12px 0;
  color: #ccc;
  transition: all 0.3s ease;
  cursor: pointer;
  font-size: 1.1rem;
}

.lyric-line:hover {
  color: #999;
}

.lyric-line.active {
  color: var(--accent);
  font-weight: 700;
  transform: scale(1.05);
}

/* Showcase Grid */
.showcase-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
}

.showcase-card {
  background: white;
  border-radius: 12px;
  overflow: hidden;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  transition: 0.3s;
}

.showcase-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
}

.preview-box {
  height: 160px;
  background: #f1f5f9;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  font-size: 3rem;
}

.showcase-img {
  width: 100%;
  height: 160px;
  object-fit: cover;
  display: block;
  transition: transform 0.5s ease;
}

.showcase-card:hover .showcase-img {
  transform: scale(1.05); /* Zoom effect on hover */
}

.showcase-info {
  padding: 20px;
}

.showcase-title {
  font-weight: 600;
  margin-bottom: 5px;
  display: block;
}

.showcase-platform {
  font-size: 0.85rem;
  color: var(--text-secondary);
}

/* Footer */
footer {
  text-align: center;
  padding: 40px 0;
  color: var(--text-secondary);
  font-size: 0.9rem;
  border-top: 1px solid var(--border);
}

@media (max-width: 768px) {
  .player-container {
    grid-template-columns: 1fr;
    height: auto;
  }
  .lyrics-container {
    height: 300px;
  }
  .nav {
    display: none; /* Mobile menu needed */
  }
}

/* Click Interaction Note */
.click-note {
  position: absolute;
  font-size: 1.5rem;
  color: var(--accent);
  pointer-events: none;
  animation: click-float 1s ease-out forwards;
  z-index: 9999;
}

@keyframes click-float {
  0% {
    transform: translate(-50%, -50%) scale(0.5);
    opacity: 1;
  }
  100% {
    transform: translate(-50%, -150%) scale(1.5);
    opacity: 0;
  }
}