/* ===================================
   ICH Detection System - Apple Style CSS
   Complete stylesheet for all pages
   =================================== */

/* Reset & Base Styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --primary-blue: #0071e3;
  --dark-blue: #0055b3;
  --text-primary: #1d1d1f;
  --text-secondary: #6e6e73;
  --bg-light: #f5f5f7;
  --bg-white: #ffffff;
  --border-light: #d2d2d7;
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.08);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.12);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.16);
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen,
    Ubuntu, Cantarell, "Helvetica Neue", sans-serif;
  line-height: 1.6;
  color: var(--text-primary);
  background-color: var(--bg-light);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

.navbar {
  background: rgba(255, 255, 255, 0.8);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-light);
  position: sticky;
  top: 0;
  z-index: 1000;
  padding: 0;
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 16px 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 20px;
  font-weight: 600;
  color: var(--text-primary);
}

.logo-icon {
  font-size: 28px;
}

.nav-links {
  display: flex;
  gap: 32px;
}

.nav-link {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 16px;
  font-weight: 500;
  transition: var(--transition);
  position: relative;
}

.nav-link:hover {
  color: var(--text-primary);
}

.nav-link.active {
  color: var(--primary-blue);
}

.nav-link.active::after {
  content: "";
  position: absolute;
  bottom: -20px;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--primary-blue);
}

/* ===================================
   Hero Section
   =================================== */

.hero {
  text-align: center;
  min-height: 70vh;
  padding: 120px 24px;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
}

.hero-content {
  max-width: 800px;
  margin: 0 auto;
}

.hero-title {
  font-size: 56px;
  font-weight: 700;
  line-height: 1.1;
  margin-bottom: 24px;
  letter-spacing: -0.5px;
}

.hero-subtitle {
  font-size: 28px;
  font-weight: 500;
  margin-bottom: 16px;
  opacity: 0.95;
}

.hero-description {
  font-size: 20px;
  opacity: 0.9;
  margin-bottom: 48px;
  line-height: 1.5;
}

.cta-button {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  background: white;
  color: var(--primary-blue);
  padding: 16px 48px;
  font-size: 18px;
  font-weight: 600;
  border-radius: 980px;
  text-decoration: none;
  transition: var(--transition);
  box-shadow: var(--shadow-md);
}

.cta-button:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.cta-button .arrow {
  font-size: 24px;
  transition: var(--transition);
}

.cta-button:hover .arrow {
  transform: translateX(4px);
}

.disclaimer {
  margin-top: 32px;
  font-size: 14px;
  opacity: 0.8;
}

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

.about-section,
.research-section {
  padding: 80px 24px;
}

.section-container {
  max-width: 1200px;
  margin: 0 auto;
}

.section-title {
  font-size: 42px;
  font-weight: 700;
  text-align: center;
  margin-bottom: 24px;
  color: var(--text-primary);
}

.section-text {
  font-size: 20px;
  text-align: center;
  max-width: 800px;
  margin: 0 auto 64px;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ===================================
   ICH Types Grid
   =================================== */

.ich-types {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
  margin-top: 48px;
}

.ich-card {
  background: var(--bg-white);
  padding: 32px;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}

.ich-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.ich-card h3 {
  font-size: 22px;
  font-weight: 600;
  margin-bottom: 12px;
  color: var(--text-primary);
}

.ich-card p {
  font-size: 16px;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ===================================
   Approach Grid
   =================================== */

.approach-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 32px;
  margin-top: 48px;
}

.approach-card {
  background: var(--bg-white);
  padding: 40px;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  text-align: center;
  transition: var(--transition);
}

.approach-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.approach-icon {
  font-size: 48px;
  margin-bottom: 20px;
}

.approach-card h3 {
  font-size: 24px;
  font-weight: 600;
  margin-bottom: 16px;
  color: var(--text-primary);
}

.approach-card p {
  font-size: 16px;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ===================================
   Detection Page
   =================================== */

.detection-section {
  min-height: calc(100vh - 60px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 60px 24px;
}

.detection-container {
  max-width: 700px;
  width: 100%;
}

.detection-title {
  font-size: 48px;
  font-weight: 700;
  text-align: center;
  margin-bottom: 16px;
  color: var(--text-primary);
}

.detection-subtitle {
  font-size: 20px;
  text-align: center;
  color: var(--text-secondary);
  margin-bottom: 48px;
}

.upload-card {
  background: var(--bg-white);
  padding: 48px;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
}

.upload-area {
  border: 3px dashed var(--border-light);
  border-radius: var(--radius-md);
  padding: 64px 32px;
  text-align: center;
  cursor: pointer;
  transition: var(--transition);
  margin-bottom: 32px;
}

.upload-area:hover {
  border-color: var(--primary-blue);
  background: rgba(0, 113, 227, 0.02);
}

.upload-area.dragover {
  border-color: var(--primary-blue);
  background: rgba(0, 113, 227, 0.05);
}

.upload-icon {
  font-size: 64px;
  margin-bottom: 16px;
  opacity: 0.5;
}

.upload-text {
  font-size: 20px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 8px;
}

.upload-hint {
  font-size: 16px;
  color: var(--text-secondary);
}

.file-name {
  margin-top: 20px;
  font-size: 16px;
  font-weight: 600;
  color: var(--primary-blue);
}

.run-button {
  width: 100%;
  padding: 18px;
  font-size: 18px;
  font-weight: 600;
  color: white;
  background: var(--primary-blue);
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: var(--transition);
}

.run-button:hover:not(:disabled) {
  background: var(--dark-blue);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.run-button:disabled {
  background: var(--border-light);
  cursor: not-allowed;
}

.info-box {
  background: var(--bg-light);
  padding: 24px;
  border-radius: var(--radius-sm);
  margin-top: 32px;
}

.info-box h3 {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 12px;
  color: var(--text-primary);
}

.info-box ul {
  list-style: none;
  padding: 0;
}

.info-box li {
  padding: 8px 0;
  color: var(--text-secondary);
  font-size: 16px;
}

.info-box li::before {
  content: "✓ ";
  color: var(--primary-blue);
  font-weight: bold;
  margin-right: 8px;
}

/* ===================================
   Loading Overlay
   =================================== */

.loading-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.8);
  backdrop-filter: blur(10px);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 9999;
}

.loading-overlay.active {
  display: flex;
}

.loading-content {
  text-align: center;
  color: white;
}

.spinner {
  width: 64px;
  height: 64px;
  border: 4px solid rgba(255, 255, 255, 0.2);
  border-top-color: white;
  border-radius: 50%;
  animation: spin 1s linear infinite;
  margin: 0 auto 24px;
}

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

.loading-text {
  font-size: 24px;
  font-weight: 600;
  margin-bottom: 8px;
}

.loading-subtext {
  font-size: 16px;
  opacity: 0.8;
}

/* ===================================
   Results Page
   =================================== */

.results-section {
  padding: 60px 24px;
}

.results-container {
  max-width: 1200px;
  margin: 0 auto;
}

.results-title {
  font-size: 48px;
  font-weight: 700;
  text-align: center;
  margin-bottom: 48px;
  color: var(--text-primary);
}

.images-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
  gap: 32px;
  margin-bottom: 48px;
}

.image-card {
  background: var(--bg-white);
  padding: 32px;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
}

.image-card h3 {
  font-size: 20px;
  font-weight: 600;
  margin-bottom: 16px;
  color: var(--text-primary);
}

.image-card img {
  width: 100%;
  border-radius: var(--radius-sm);
  margin-bottom: 12px;
}

.image-caption {
  font-size: 14px;
  color: var(--text-secondary);
  text-align: center;
}

.summary-card,
.scores-card,
.info-card {
  background: var(--bg-white);
  padding: 40px;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  margin-bottom: 32px;
}

.summary-card h2,
.scores-card h2,
.info-card h2 {
  font-size: 28px;
  font-weight: 600;
  margin-bottom: 24px;
  color: var(--text-primary);
}

.detected-list {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 20px 0;
}

.detected-badge {
  padding: 8px 16px;
  background: #d1fae5;
  color: #065f46;
  border-radius: 20px;
  font-size: 15px;
  font-weight: 600;
}

.no-detection {
  padding: 8px 16px;
  background: #e5e7eb;
  color: #4b5563;
  border-radius: 20px;
  font-size: 15px;
  font-weight: 600;
}

.scores-table {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.score-row {
  display: flex;
  align-items: center;
  gap: 16px;
}

.score-label {
  flex: 0 0 200px;
  font-size: 16px;
  font-weight: 500;
  color: var(--text-primary);
}

.score-bar-container {
  flex: 1;
  height: 32px;
  background: var(--bg-light);
  border-radius: 16px;
  overflow: hidden;
  position: relative;
}

.score-bar {
  height: 100%;
  background: linear-gradient(90deg, var(--primary-blue), #667eea);
  border-radius: 16px;
  transition: width 0.6s ease-out;
}

.score-value {
  flex: 0 0 70px;
  text-align: right;
  font-size: 16px;
  font-weight: 600;
  color: var(--text-primary);
}

.ich-info-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
}

.ich-info-item {
  padding: 20px;
  background: var(--bg-light);
  border-radius: var(--radius-sm);
}

.ich-info-item h3 {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--text-primary);
}

.ich-info-item p {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.6;
}

.actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  margin-top: 48px;
}

.action-button {
  padding: 14px 32px;
  font-size: 16px;
  font-weight: 600;
  border-radius: var(--radius-md);
  text-decoration: none;
  border: none;
  cursor: pointer;
  transition: var(--transition);
}

.action-button.primary {
  background: var(--primary-blue);
  color: white;
}

.action-button.primary:hover {
  background: var(--dark-blue);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.action-button.secondary {
  background: var(--bg-light);
  color: var(--text-primary);
}

.action-button.secondary:hover {
  background: var(--border-light);
}

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

.footer {
  background: var(--bg-white);
  border-top: 1px solid var(--border-light);
  padding: 48px 24px;
  text-align: center;
}

.footer-content p {
  font-size: 14px;
  color: var(--text-secondary);
  margin-bottom: 8px;
}

.footer-disclaimer {
  font-size: 13px;
  font-style: italic;
}

/* ===================================
   Responsive Design
   =================================== */

@media (max-width: 768px) {
  .hero-title {
    font-size: 36px;
  }

  .hero-subtitle {
    font-size: 20px;
  }

  .hero-description {
    font-size: 16px;
  }

  .section-title {
    font-size: 32px;
  }

  .section-text {
    font-size: 16px;
  }

  .detection-title {
    font-size: 32px;
  }

  .results-title {
    font-size: 36px;
  }

  .images-grid {
    grid-template-columns: 1fr;
  }

  .nav-links {
    gap: 16px;
  }

  .nav-link {
    font-size: 14px;
  }

  .actions {
    flex-direction: column;
  }

  .action-button {
    width: 100%;
  }
}