@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&display=swap');

:root {
  --color-bg-canvas: #f5f5f7;
  --color-glass-bg: rgba(255, 255, 255, 0.68);
  --color-glass-border: rgba(0, 0, 0, 0.06);
  --color-glass-shadow: rgba(0, 0, 0, 0.04);
  --color-text-primary: #1d1d1f;
  --color-text-secondary: #86868b;
  --color-accent-blue: #0071e3;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

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

body {
  font-family: var(--font-sans);
  background-color: var(--color-bg-canvas);
  color: var(--color-text-primary);
  background-image: 
    radial-gradient(circle at 15% 20%, rgba(0, 113, 227, 0.04) 0%, transparent 45%),
    radial-gradient(circle at 85% 75%, rgba(191, 90, 242, 0.04) 0%, transparent 45%),
    radial-gradient(circle at 50% 50%, rgba(245, 245, 247, 0.85) 0%, var(--color-bg-canvas) 100%);
  background-attachment: fixed;
  background-size: cover;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  padding-bottom: 80px;
}

.container {
  max-width: 800px;
  margin: 0 auto;
  padding: 80px 24px;
}

header {
  text-align: center;
  margin-bottom: 60px;
}

header h1 {
  font-size: 3.5rem;
  font-weight: 900;
  letter-spacing: -0.05em;
  color: var(--color-text-primary);
  margin-bottom: 12px;
}

header p {
  font-size: 1.25rem;
  color: var(--color-text-secondary);
  font-weight: 400;
  max-width: 600px;
  margin: 0 auto;
}

/* Glassmorphism Card System */
.demon-card {
  background: var(--color-glass-bg);
  border: 1px solid var(--color-glass-border);
  border-radius: 24px;
  margin-bottom: 24px;
  box-shadow: 
    0 4px 20px 0 var(--color-glass-shadow),
    inset 0 1px 1px 0 rgba(255, 255, 255, 0.8);
  backdrop-filter: blur(30px) saturate(200%);
  -webkit-backdrop-filter: blur(30px) saturate(200%);
  overflow: hidden;
  transition: transform 0.4s cubic-bezier(0.25, 1, 0.5, 1),
              box-shadow 0.4s cubic-bezier(0.25, 1, 0.5, 1),
              border-color 0.4s cubic-bezier(0.25, 1, 0.5, 1);
  cursor: pointer;
}

.demon-card:hover {
  transform: translateY(-4px) scale(1.008);
  box-shadow: 
    0 16px 36px 0 rgba(0, 0, 0, 0.08),
    inset 0 1px 2px 0 rgba(255, 255, 255, 0.9);
  border-color: rgba(0, 0, 0, 0.12);
}

/* Card Header */
.card-header {
  display: flex;
  align-items: center;
  padding: 24px 32px;
  gap: 24px;
  user-select: none;
}

.demon-thumbnail-small {
  width: 140px;
  height: 78px;
  background-size: cover;
  background-position: center;
  border-radius: 12px;
  border: 1px solid rgba(0, 0, 0, 0.06);
  flex-shrink: 0;
}

.header-text-container {
  display: flex;
  flex-direction: column;
  flex-grow: 1;
  text-align: left;
}

.demon-rank-name {
  font-size: 1.5rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--color-text-primary);
  margin-bottom: 4px;
}

.demon-creator {
  font-size: 0.95rem;
  color: var(--color-text-secondary);
  font-weight: 500;
}

.score-badge {
  background: rgba(0, 113, 227, 0.08);
  color: var(--color-accent-blue);
  padding: 8px 16px;
  border-radius: 99px;
  font-size: 1rem;
  font-weight: 700;
  font-family: monospace;
}

.arrow-icon {
  font-size: 1.25rem;
  color: var(--color-text-secondary);
  transition: transform 0.4s cubic-bezier(0.25, 1, 0.5, 1);
  display: flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
}

.demon-card.active .arrow-icon {
  transform: rotate(180deg);
  color: var(--color-text-primary);
}

/* Expandable Content Panel */
.card-details {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s cubic-bezier(0.25, 1, 0.5, 1);
  border-top: 0 solid var(--color-glass-border);
}

.demon-card.active .card-details {
  max-height: 1200px; /* high limit to fit content */
  border-top-width: 1px;
}

.details-content {
  padding: 32px;
  display: flex;
  flex-direction: column;
  gap: 32px;
}

/* Video Frame Container */
.video-container {
  position: relative;
  width: 100%;
  padding-bottom: 56.25%; /* 16:9 ratio */
  height: 0;
  border-radius: 16px;
  overflow: hidden;
  border: 1px solid rgba(0, 0, 0, 0.08);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.03);
}

.video-container iframe {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border: 0;
}

/* Metadata readouts */
.metadata-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 16px;
}

.metadata-item {
  background: rgba(0, 0, 0, 0.02);
  border: 1px solid rgba(0, 0, 0, 0.04);
  padding: 16px;
  border-radius: 14px;
  text-align: left;
}

.metadata-label {
  font-size: 0.8rem;
  color: var(--color-text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-weight: 600;
  margin-bottom: 4px;
}

.metadata-value {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--color-text-primary);
}

/* Justification section */
.justification-section {
  text-align: left;
  background: rgba(0, 113, 227, 0.03);
  border-left: 4px solid var(--color-accent-blue);
  padding: 20px 24px;
  border-radius: 0 16px 16px 0;
}

.justification-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-text-primary);
  margin-bottom: 6px;
}

.justification-text {
  font-size: 0.95rem;
  line-height: 1.55;
  color: #333336;
}

/* Sub-scores Dashboard */
.subscores-section {
  text-align: left;
}

.subscores-title {
  font-size: 1.2rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--color-text-primary);
  margin-bottom: 20px;
}

.subscores-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  column-gap: 40px;
  row-gap: 20px;
}

@media (max-width: 600px) {
  .subscores-grid {
    grid-template-columns: 1fr;
  }
  
  .card-header {
    flex-direction: column;
    align-items: flex-start;
    padding: 24px;
  }
  
  .demon-thumbnail-small {
    width: 100%;
    height: 160px;
  }
}

.subscore-item {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.subscore-header {
  display: flex;
  justify-content: space-between;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--color-text-secondary);
}

.subscore-name {
  text-transform: capitalize;
}

.subscore-value {
  font-family: monospace;
  font-weight: 700;
  color: var(--color-text-primary);
}

.progress-track {
  width: 100%;
  height: 8px;
  background: rgba(0, 0, 0, 0.05);
  border-radius: 99px;
  overflow: hidden;
}

.progress-bar {
  height: 100%;
  border-radius: 99px;
  background: linear-gradient(90deg, var(--color-accent-blue) 0%, #00d2ff 100%);
  width: 0;
  transition: width 0.8s cubic-bezier(0.25, 1, 0.5, 1);
}

/* Minimalist Apple Footer */
footer {
  text-align: center;
  padding: 40px 24px;
  font-size: 0.8rem;
  color: var(--color-text-secondary);
  border-top: 1px solid var(--color-glass-border);
  max-width: 800px;
  margin: 40px auto 0 auto;
}

footer p {
  line-height: 1.6;
}

footer a {
  color: var(--color-accent-blue);
  text-decoration: none;
}

footer a:hover {
  text-decoration: underline;
}

/* Alert/Notification Banners */
.alert-banner {
  background: rgba(52, 199, 89, 0.08); /* System green */
  border: 1px solid rgba(52, 199, 89, 0.2);
  color: #1e7e34;
  padding: 16px 24px;
  border-radius: 16px;
  margin-bottom: 24px;
  text-align: center;
  font-size: 0.95rem;
  font-weight: 500;
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  animation: fadeIn 0.5s ease;
}

.alert-banner.error {
  background: rgba(255, 59, 48, 0.08); /* System red */
  border: 1px solid rgba(255, 59, 48, 0.2);
  color: #d11a2a;
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(-10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Stats Viewer Teaser Card */
.stats-viewer-teaser {
  position: relative;
  background: var(--color-glass-bg);
  border: 1px solid var(--color-glass-border);
  border-radius: 20px;
  padding: 24px 32px;
  margin-bottom: 40px;
  box-shadow: 
    0 4px 20px 0 var(--color-glass-shadow),
    inset 0 1px 1px 0 rgba(255, 255, 255, 0.8);
  backdrop-filter: blur(30px) saturate(200%);
  -webkit-backdrop-filter: blur(30px) saturate(200%);
  display: flex;
  justify-content: space-between;
  align-items: center;
  overflow: hidden;
  user-select: none;
  opacity: 0.85;
}

.stats-viewer-teaser::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(255, 255, 255, 0.2);
  pointer-events: none;
}

.teaser-content {
  text-align: left;
}

.teaser-title {
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--color-text-primary);
  margin-bottom: 4px;
}

.teaser-desc {
  font-size: 0.9rem;
  color: var(--color-text-secondary);
  max-width: 480px;
}

.coming-soon-badge {
  background: linear-gradient(135deg, #ff9f0a 0%, #ff3b30 100%);
  color: #fff;
  padding: 6px 14px;
  border-radius: 99px;
  font-size: 0.75rem;
  font-weight: 800;
  letter-spacing: 0.05em;
  box-shadow: 0 4px 10px rgba(255, 59, 48, 0.2);
  flex-shrink: 0;
}