/* ── Custom Properties ── */
:root {
  --primary: #6366f1;
  --primary-light: #818cf8;
  --primary-dark: #4f46e5;
  --accent: #ec4899;
  --accent-light: #f472b6;
  --surface: rgba(255, 255, 255, 0.92);
  --surface-hover: rgba(255, 255, 255, 0.97);
  --text: #1e1b4b;
  --text-muted: #64748b;
  --border: rgba(255, 255, 255, 0.18);
  --shadow-sm: 0 0.0625em 0.1875em rgba(0, 0, 0, 0.06);
  --shadow-md: 0 0.5em 2em rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 1em 3em rgba(0, 0, 0, 0.12);
  --shadow-xl: 0 1.5em 4em rgba(0, 0, 0, 0.16);
  --radius-sm: 0.5em;
  --radius-md: 0.875em;
  --radius-lg: 1.25em;
  --radius-xl: 1.75em;
  --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto',
    'Helvetica Neue', sans-serif;
}

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

body {
  font-family: var(--font);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  background: linear-gradient(135deg, #4f46e5 0%, #7c3aed 40%, #a855f7 100%);
  background-attachment: fixed;
  min-height: 100vh;
  color: var(--text);
  line-height: 1.6;
  letter-spacing: -0.01em;
}

h2 {
  margin-bottom: 0.3em;
  letter-spacing: -0.025em;
}

.container {
  max-width: 75em;
  margin: 0 auto;
  padding: 0 1.25em;
}

/* ── Buttons ── */
.btn {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  color: white;
  border: none;
  padding: 0.75em 1.625em;
  border-radius: var(--radius-md);
  cursor: pointer;
  font-family: var(--font);
  font-size: 0.9375em;
  font-weight: 600;
  letter-spacing: -0.01em;
  transition: all var(--transition);
  box-shadow: 0 0.25em 0.875em rgba(99, 102, 241, 0.35),
              inset 0 0.0625em 0 rgba(255, 255, 255, 0.15);
  text-decoration: none;
  display: inline-block;
  position: relative;
  overflow: hidden;
}

.btn::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(255,255,255,0.12) 0%, transparent 50%);
  pointer-events: none;
}

.btn:hover {
  transform: translateY(-0.125em);
  box-shadow: 0 0.5em 1.5em rgba(99, 102, 241, 0.4),
              inset 0 0.0625em 0 rgba(255, 255, 255, 0.2);
  filter: brightness(1.05);
}

.btn:active {
  transform: translateY(0);
  filter: brightness(0.98);
}

.btn-secondary {
  background: linear-gradient(135deg, var(--accent) 0%, #db2777 100%);
  box-shadow: 0 0.25em 0.875em rgba(236, 72, 153, 0.35),
              inset 0 0.0625em 0 rgba(255, 255, 255, 0.15);
}

.btn-secondary:hover {
  box-shadow: 0 0.5em 1.5em rgba(236, 72, 153, 0.4),
              inset 0 0.0625em 0 rgba(255, 255, 255, 0.2);
}

.btn-success {
  background: linear-gradient(135deg, #06b6d4, #0891b2);
  box-shadow: 0 0.25em 0.875em rgba(6, 182, 212, 0.35),
              inset 0 0.0625em 0 rgba(255, 255, 255, 0.15);
}

.btn-success:hover {
  box-shadow: 0 0.5em 1.5em rgba(6, 182, 212, 0.4),
              inset 0 0.0625em 0 rgba(255, 255, 255, 0.2);
}

.btn-small {
  padding: 0.5em 1.125em;
  font-size: 0.8125em;
  border-radius: var(--radius-sm);
}

/* ── Cards ── */
.card {
  background: var(--surface);
  backdrop-filter: blur(1.25em) saturate(1.5);
  -webkit-backdrop-filter: blur(1.25em) saturate(1.5);
  border: 0.0625em solid var(--border);
  border-radius: var(--radius-lg);
  padding: 2em;
  box-shadow: var(--shadow-md);
  margin: 1.25em 0;
  transition: transform var(--transition), box-shadow var(--transition);
}

.card:hover {
  transform: translateY(-0.25em);
  box-shadow: var(--shadow-lg);
}

/* ── Forms ── */
.form-group {
  margin-bottom: 1.375em;
}

.form-group label {
  display: block;
  margin-bottom: 0.5em;
  font-weight: 600;
  font-size: 0.875em;
  color: var(--text);
  letter-spacing: -0.01em;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 0.75em 0.875em;
  border: 0.09375em solid #e2e8f0;
  border-radius: var(--radius-sm);
  font-family: var(--font);
  font-size: 0.9375em;
  color: var(--text);
  background: #f8fafc;
  transition: all var(--transition);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 0.1875em rgba(99, 102, 241, 0.15);
  background: #fff;
}

/* Ensure checkboxes align inline with their label text */
.form-group input[type="checkbox"] {
  width: auto;
  display: inline-block;
  vertical-align: middle;
  margin-right: 0.5em;
  accent-color: var(--primary);
}

.grid {
  display: grid;
  gap: 1.25em;
}

.grid-2 {
  grid-template-columns: repeat(auto-fit, minmax(18.75em, 1fr));
}

.text-center {
  text-align: center;
}

/* ── Loading Spinner ── */
.loading {
  display: inline-block;
  width: 1.25em;
  height: 1.25em;
  border: 0.15625em solid #e2e8f0;
  border-top: 0.15625em solid var(--primary);
  border-radius: 50%;
  animation: spin 0.8s cubic-bezier(0.45, 0.05, 0.55, 0.95) infinite;
}

@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

/* ── Progress Bar ── */
.progress-bar {
  width: 100%;
  height: 0.625em;
  background-color: #e2e8f0;
  border-radius: 62.4375em;
  overflow: hidden;
  margin: 0.625em 0;
}

.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  border-radius: 62.4375em;
  transition: width 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
}

.progress-fill::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, transparent 0%, rgba(255,255,255,0.3) 50%, transparent 100%);
  animation: shimmer 2s ease-in-out infinite;
}

@keyframes shimmer {
  0% { transform: translateX(-100%); }
  100% { transform: translateX(100%); }
}

/* ── Alerts ── */
.error {
  color: #dc2626;
  background: #fef2f2;
  padding: 0.75em 1em;
  border-radius: var(--radius-sm);
  border-left: 0.25em solid #dc2626;
  margin: 0.625em 0;
  font-size: 0.875em;
  font-weight: 500;
}

.success {
  color: #16a34a;
  background: #f0fdf4;
  padding: 0.75em 1em;
  border-radius: var(--radius-sm);
  border-left: 0.25em solid #16a34a;
  margin: 0.625em 0;
  font-size: 0.875em;
  font-weight: 500;
}

.loading-container {
  display: flex;
  align-items: center;
  gap: 0.625em;
  margin: 0.625em 0;
}

.button-group {
  display: flex;
  gap: 0.625em;
  flex-wrap: wrap;
}

/* ── Page Header ── */
.page-header {
  text-align: center;
  margin-bottom: 2.5em;
}

.page-header h1 {
  font-size: 2.5em;
  font-weight: 800;
  margin-bottom: 0.625em;
  color: white;
  letter-spacing: -0.03em;
  text-shadow: 0 0.125em 1.25em rgba(0, 0, 0, 0.1);
}

.page-header p {
  font-size: 1.1em;
  color: rgba(255, 255, 255, 0.85);
  font-weight: 400;
}

.radio-group {
  display: flex;
  gap: 1.25em;
  margin: 0.625em 0;
}

.radio-group label {
  display: flex;
  align-items: center;
  gap: 0.3125em;
  font-weight: normal;
  cursor: pointer;
}

/* ── File Input ── */
.file-input {
  padding: 0.875em 1.125em;
  border: 0.125em dashed #c7d2fe;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, #f5f3ff 0%, #ede9fe 100%);
  cursor: pointer;
  transition: all var(--transition);
  font-family: var(--font);
  font-size: 0.875em;
  font-weight: 500;
  color: var(--text);
  position: relative;
  display: block;
  width: 100%;
  box-shadow: 0 0.125em 0.5em rgba(99, 102, 241, 0.08);
}

.file-input:hover {
  border-color: var(--primary);
  background: linear-gradient(135deg, #ede9fe 0%, #ddd6fe 100%);
  box-shadow: 0 0.25em 1em rgba(99, 102, 241, 0.15);
  transform: translateY(-0.0625em);
}

.file-input:active {
  transform: translateY(0);
}

.file-input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 0.1875em rgba(99, 102, 241, 0.15),
              0 0.25em 1em rgba(99, 102, 241, 0.15);
}

/* Style the file input button text */
.file-input::-webkit-file-upload-button {
  padding: 0.5em 1em;
  margin-right: 0.75em;
  border: none;
  border-radius: var(--radius-sm);
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: white;
  font-family: var(--font);
  font-size: 0.8125em;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition);
  box-shadow: 0 0.125em 0.5em rgba(99, 102, 241, 0.25);
}

.file-input::-webkit-file-upload-button:hover {
  background: linear-gradient(135deg, var(--primary-dark), #4338ca);
  box-shadow: 0 0.25em 0.75em rgba(99, 102, 241, 0.35);
  transform: translateY(-0.0625em);
}

.file-input::-webkit-file-upload-button:active {
  transform: translateY(0);
}

/* Firefox file input button */
.file-input::file-selector-button {
  padding: 0.5em 1em;
  margin-right: 0.75em;
  border: none;
  border-radius: var(--radius-sm);
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: white;
  font-family: var(--font);
  font-size: 0.8125em;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition);
  box-shadow: 0 0.125em 0.5em rgba(99, 102, 241, 0.25);
}

.file-input::file-selector-button:hover {
  background: linear-gradient(135deg, var(--primary-dark), #4338ca);
  box-shadow: 0 0.25em 0.75em rgba(99, 102, 241, 0.35);
  transform: translateY(-0.0625em);
}

.file-input::file-selector-button:active {
  transform: translateY(0);
}

/* ── Data / Model Info ── */
.data-info, .model-info {
  background: #f5f3ff;
  padding: 1em;
  border-radius: var(--radius-sm);
  border-left: 0.25em solid var(--primary);
  margin: 0.9375em 0;
}

.data-info h3, .model-info h3 {
  margin-bottom: 0.625em;
  color: var(--text);
  font-size: 0.9375em;
  font-weight: 700;
}

.data-info p, .model-info p {
  margin: 0.3125em 0;
  color: var(--text-muted);
  font-size: 0.875em;
}

/* ── Footer ── */
.footer {
  background: rgba(0, 0, 0, 0.15);
  backdrop-filter: blur(1.25em);
  -webkit-backdrop-filter: blur(1.25em);
  border-top: 0.0625em solid rgba(255, 255, 255, 0.08);
  padding: 0.5em 0;
}

@media (max-width: 48em) {
  .container {
    padding: 0 0.875em;
  }
  
  .card {
    padding: 1.375em;
    border-radius: var(--radius-md);
  }
  
  .grid-2 {
    grid-template-columns: 1fr;
  }
  
  .button-group {
    flex-direction: column;
  }
  
  .btn {
    width: 100%;
    text-align: center;
  }
}

/* ── No-cookies Banner ── */
.no-cookies-banner {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(135deg, #ffffff 0%, #f8fafc 100%);
  backdrop-filter: blur(1.5em) saturate(1.8);
  -webkit-backdrop-filter: blur(1.5em) saturate(1.8);
  border-top: 0.0625em solid rgba(0, 0, 0, 0.08);
  box-shadow: 0 -0.5em 2.5em rgba(0, 0, 0, 0.12),
              0 -0.125em 0.5em rgba(0, 0, 0, 0.06);
  z-index: 1100;
  animation: slideUp 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

@keyframes slideUp {
  from {
    transform: translateY(100%);
    opacity: 0;
  }
  to {
    transform: translateY(0);
    opacity: 1;
  }
}

.no-cookies-banner .banner-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1em;
  padding: 1.125em 0;
}

.no-cookies-banner .banner-content {
  display: flex;
  align-items: center;
  gap: 0.875em;
  flex: 1;
}

.no-cookies-banner .banner-icon {
  font-size: 1.5em;
  line-height: 1;
  flex-shrink: 0;
  filter: grayscale(0.3);
}

.no-cookies-banner .banner-text-wrapper {
  display: flex;
  flex-direction: column;
  gap: 0.25em;
  flex: 1;
}

.no-cookies-banner .banner-text {
  color: var(--text);
  font-size: 0.9375em;
  font-weight: 500;
  line-height: 1.4;
  letter-spacing: -0.01em;
}

.no-cookies-banner .banner-link {
  color: var(--primary);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.875em;
  transition: color var(--transition);
  display: inline-flex;
  align-items: center;
  gap: 0.25em;
}

.no-cookies-banner .banner-link:hover {
  color: #7c3aed;
  text-decoration: underline;
  text-underline-offset: 0.125em;
}

.no-cookies-banner .banner-link::after {
  content: '→';
  font-size: 0.75em;
  transition: transform var(--transition);
}

.no-cookies-banner .banner-link:hover::after {
  transform: translateX(0.125em);
}

.no-cookies-banner .banner-dismiss {
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: #fff;
  flex-shrink: 0;
  white-space: nowrap;
}

@media (max-width: 37.5em) {
  .no-cookies-banner .banner-inner {
    flex-direction: column;
    align-items: stretch;
    gap: 0.875em;
    padding: 1.25em 1.25em;
  }

  .no-cookies-banner .banner-content {
    gap: 0.75em;
  }

  .no-cookies-banner .banner-icon {
    font-size: 1.375em;
  }

  .no-cookies-banner .banner-text {
    font-size: 0.875em;
  }

  .no-cookies-banner .banner-text-wrapper {
    gap: 0.375em;
  }

  .no-cookies-banner .banner-dismiss {
    width: 100%;
    padding: 0.75em 1.5em;
    font-size: 0.9375em;
  }
}