/* ===================================
   DESIGN SYSTEM — Clinical Dark Mode
   =================================== */

:root {
  --color-primary-50: #0F1D2E;
  --color-primary-100: #152A42;
  --color-primary-200: #1E3A5F;
  --color-primary-300: #2B5B8A;
  --color-primary-400: #3B82F6;
  --color-primary-500: #60A5FA;
  --color-primary-600: #93C5FD;
  --color-primary-700: #BFDBFE;

  --color-secondary-50: #1A1625;
  --color-secondary-100: #2E2445;
  --color-secondary-500: #A78BFA;
  --color-secondary-600: #C4B5FD;

  --color-accent-50: #0D2128;
  --color-accent-400: #22D3EE;
  --color-accent-500: #06B6D4;

  --color-gray-50: #0B0F14;
  --color-gray-100: #111827;
  --color-gray-200: #1F2937;
  --color-gray-300: #374151;
  --color-gray-400: #6B7280;
  --color-gray-500: #9CA3AF;
  --color-gray-600: #D1D5DB;
  --color-gray-700: #E5E7EB;
  --color-gray-800: #F3F4F6;
  --color-gray-900: #F9FAFB;

  --color-bg-primary: #0B0F14;
  --color-bg-secondary: #111827;
  --color-text-primary: #F1F5F9;
  --color-text-secondary: #94A3B8;
  --color-text-tertiary: #64748B;
  --color-border-light: rgba(148, 163, 184, 0.12);
  --color-border-medium: rgba(148, 163, 184, 0.2);

  --color-glioma: #F87171;
  --color-meningioma: #FBBF24;
  --color-pituitary: #A78BFA;
  --color-no-tumor: #34D399;
  --color-schwannoma: #F472B6;
  --color-neurocytoma: #22D3EE;
  --color-carcinoma: #EF4444;
  --color-papilloma: #FB923C;

  --font-heading: 'Manrope', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-body: 'DM Sans', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'JetBrains Mono', 'Courier New', monospace;

  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
}

/* ===================================
   RESET & BASE
   =================================== */

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

body {
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--color-text-primary);
  background: var(--color-bg-primary);
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Focus styles for keyboard navigation */
:focus-visible {
  outline: 3px solid var(--color-primary-400);
  outline-offset: 2px;
  border-radius: 4px;
}

:focus:not(:focus-visible) {
  outline: none;
}

h1, h2, h3 {
  font-family: var(--font-heading);
  line-height: 1.2;
  font-weight: 700;
}

h1 {
  font-size: 2rem;
  margin-bottom: 0.5rem;
}

h2 {
  font-size: 1.25rem;
  margin-bottom: 1rem;
}

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

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

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

.hidden {
  display: none !important;
}

.subtitle {
  color: var(--color-text-secondary);
  font-size: 1.05rem;
  margin-bottom: 2rem;
}

/* ===================================
   HEADER
   =================================== */

.header {
  border-bottom: 1px solid var(--color-border-light);
  padding: 0.85rem 0;
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(20px);
  background: rgba(11, 15, 20, 0.8);
  box-shadow: 0 1px 12px rgba(0, 0, 0, 0.3);
}

.header-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
}

.logo-icon {
  width: 38px;
  height: 38px;
  background: linear-gradient(135deg, var(--color-primary-400), var(--color-secondary-500));
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 2px 12px rgba(59, 130, 246, 0.3);
}

.logo-icon svg {
  width: 20px;
  height: 20px;
  color: white;
}

.logo-text {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}

.logo-name {
  font-family: var(--font-heading);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--color-text-primary);
}

.logo-tagline {
  font-size: 0.65rem;
  color: var(--color-text-tertiary);
  font-weight: 400;
  letter-spacing: 0.02em;
}

.nav-tabs {
  display: flex;
  gap: 0.25rem;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-sm);
  padding: 0.25rem;
}

.nav-tab {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.5rem 1rem;
  border: none;
  background: transparent;
  border-radius: 6px;
  font-family: var(--font-body);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text-tertiary);
  cursor: pointer;
  transition: all 0.2s ease;
}

.nav-tab svg {
  width: 16px;
  height: 16px;
}

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

.nav-tab.active {
  background: rgba(59, 130, 246, 0.15);
  color: var(--color-primary-500);
  box-shadow: 0 1px 4px rgba(59, 130, 246, 0.2);
}

.back-link {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.875rem;
  color: var(--color-text-tertiary);
  transition: color 0.2s;
}

.back-link:hover {
  color: var(--color-primary-600);
}

.back-link svg {
  width: 16px;
  height: 16px;
}

/* ===================================
   SERVER BANNER
   =================================== */

.server-banner {
  background: rgba(59, 130, 246, 0.08);
  border-bottom: 1px solid rgba(59, 130, 246, 0.15);
  padding: 0.75rem 0;
  display: none;
}

.server-banner.show {
  display: block;
}

.server-banner .container {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.875rem;
  color: var(--color-primary-500);
}

/* ===================================
   MAIN / VIEWS
   =================================== */

.main {
  flex: 1;
  padding: 0 0 2.5rem;
}

.view {
  display: none;
}

.view.active {
  display: block;
}

/* Hero Banner */
.hero-banner {
  background: linear-gradient(135deg, #0B0F14 0%, #111827 50%, var(--color-primary-200) 100%);
  padding: 2.5rem 0;
  margin-bottom: 2rem;
  border-bottom: 1px solid var(--color-border-light);
}

.hero-title {
  font-size: 2rem;
  color: var(--color-text-primary);
  margin-bottom: 0.6rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.hero-desc {
  color: var(--color-text-tertiary);
  font-size: 0.95rem;
  max-width: 650px;
  line-height: 1.7;
}

/* Page headers for other views */
.view-header {
  padding: 2rem 0 0;
  margin-bottom: 0.5rem;
}

/* ===================================
   CLASSIFY VIEW
   =================================== */

.classify-layout {
  max-width: 700px;
  margin: 0 auto;
}

.upload-zone {
  border: 2px dashed var(--color-border-medium);
  border-radius: var(--radius-lg);
  padding: 3.5rem 2rem;
  text-align: center;
  cursor: pointer;
  transition: all 0.3s ease;
  background: var(--color-bg-secondary);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

.upload-zone:hover,
.upload-zone.dragover {
  border-color: var(--color-primary-400);
  background: rgba(59, 130, 246, 0.06);
  box-shadow: 0 4px 20px rgba(59, 130, 246, 0.12);
}

.upload-zone:focus-visible {
  border-color: var(--color-primary-400);
  outline-offset: 4px;
}

.upload-zone svg {
  width: 52px;
  height: 52px;
  color: var(--color-gray-400);
  margin-bottom: 1rem;
  transition: all 0.3s ease;
}

.upload-zone:hover svg,
.upload-zone.dragover svg {
  color: var(--color-primary-500);
}

.upload-text {
  font-size: 1.1rem;
  font-weight: 500;
  color: var(--color-text-primary);
  margin-bottom: 0.25rem;
}

.upload-hint {
  font-size: 0.875rem;
  color: var(--color-text-tertiary);
}

.samples-section {
  margin-top: 2rem;
  text-align: center;
}

.samples-label {
  font-size: 0.875rem;
  color: var(--color-text-tertiary);
  margin-bottom: 0.75rem;
}

.sample-buttons {
  display: flex;
  gap: 0.5rem;
  justify-content: center;
  flex-wrap: wrap;
}

/* ===================================
   BUTTONS
   =================================== */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.6rem 1.2rem;
  border: 1px solid var(--color-border-medium);
  border-radius: var(--radius-sm);
  font-family: var(--font-body);
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s ease;
  background: var(--color-bg-secondary);
  color: var(--color-text-primary);
}

.btn:hover {
  border-color: var(--color-primary-400);
  color: var(--color-primary-500);
  background: rgba(59, 130, 246, 0.08);
}

.btn svg {
  width: 16px;
  height: 16px;
}

.btn-primary {
  background: var(--color-primary-400);
  color: #0B0F14;
  border-color: var(--color-primary-400);
  font-weight: 600;
}

.btn-primary:hover {
  background: var(--color-primary-500);
  border-color: var(--color-primary-500);
  color: #0B0F14;
  box-shadow: 0 4px 16px rgba(59, 130, 246, 0.25);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.05);
  border-color: var(--color-border-medium);
}

.btn-ghost {
  background: transparent;
  border-color: transparent;
}

.btn-ghost:hover {
  background: rgba(255, 255, 255, 0.06);
}

.btn-sm {
  padding: 0.4rem 0.8rem;
  font-size: 0.8rem;
}

.btn-sample {
  font-size: 0.8rem;
  padding: 0.4rem 1rem;
}

.btn-sample[data-sample="glioma"] { border-color: var(--color-glioma); color: var(--color-glioma); }
.btn-sample[data-sample="meningioma"] { border-color: var(--color-meningioma); color: var(--color-meningioma); }
.btn-sample[data-sample="pituitary"] { border-color: var(--color-pituitary); color: var(--color-pituitary); }
.btn-sample[data-sample="no_tumor"] { border-color: var(--color-no-tumor); color: var(--color-no-tumor); }
.btn-sample[data-sample="schwannoma"] { border-color: var(--color-schwannoma); color: var(--color-schwannoma); }
.btn-sample[data-sample="neurocytoma"] { border-color: var(--color-neurocytoma); color: var(--color-neurocytoma); }
.btn-sample[data-sample="carcinoma"] { border-color: var(--color-carcinoma); color: var(--color-carcinoma); }
.btn-sample[data-sample="papilloma"] { border-color: var(--color-papilloma); color: var(--color-papilloma); }

.btn-sample:hover {
  color: white;
}
.btn-sample[data-sample="glioma"]:hover { background: var(--color-glioma); }
.btn-sample[data-sample="meningioma"]:hover { background: var(--color-meningioma); }
.btn-sample[data-sample="pituitary"]:hover { background: var(--color-pituitary); }
.btn-sample[data-sample="no_tumor"]:hover { background: var(--color-no-tumor); }
.btn-sample[data-sample="schwannoma"]:hover { background: var(--color-schwannoma); }
.btn-sample[data-sample="neurocytoma"]:hover { background: var(--color-neurocytoma); }
.btn-sample[data-sample="carcinoma"]:hover { background: var(--color-carcinoma); }
.btn-sample[data-sample="papilloma"]:hover { background: var(--color-papilloma); }

/* ===================================
   RESULT CARD
   =================================== */

.result-card {
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-lg);
  padding: 2rem;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

.result-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.5rem;
}

.result-images-row {
  display: flex;
  gap: 1rem;
  justify-content: center;
  margin-bottom: 1.5rem;
}

.result-image-col {
  text-align: center;
}

.result-image-col img {
  max-height: 220px;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border-light);
}

.gradcam-btn-row {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
}

.gradcam-hint {
  font-size: 0.8rem;
  color: var(--color-text-tertiary);
  text-align: center;
}

.gradcam-loading {
  font-size: 0.85rem;
  color: var(--color-primary-600);
}

.image-label {
  display: block;
  font-size: 0.75rem;
  color: var(--color-text-tertiary);
  margin-top: 0.4rem;
}

.subtype-gradcam-col {
  text-align: center;
  margin-bottom: 1rem;
}

.subtype-gradcam-col img {
  max-height: 180px;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border-light);
}

.result-prediction {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.result-badge {
  display: inline-block;
  padding: 0.45rem 1.1rem;
  border-radius: 20px;
  font-family: var(--font-heading);
  font-size: 1.1rem;
  font-weight: 600;
  color: white;
  text-transform: capitalize;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
}

.result-badge.glioma { background: var(--color-glioma); }
.result-badge.meningioma { background: var(--color-meningioma); }
.result-badge.pituitary { background: var(--color-pituitary); }
.result-badge.no_tumor { background: var(--color-no-tumor); }
.result-badge.schwannoma { background: var(--color-schwannoma); }
.result-badge.neurocytoma { background: var(--color-neurocytoma); }
.result-badge.carcinoma { background: var(--color-carcinoma); }
.result-badge.papilloma { background: var(--color-papilloma); }

.result-confidence {
  font-family: var(--font-mono);
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--color-text-primary);
}

/* Confidence Bars */
.confidence-bars {
  margin-bottom: 1.5rem;
}

.confidence-bar-row {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 0.6rem;
}

.confidence-label {
  width: 100px;
  font-size: 0.8rem;
  font-weight: 500;
  text-transform: capitalize;
  color: var(--color-text-secondary);
  text-align: right;
}

.confidence-track {
  flex: 1;
  height: 26px;
  background: rgba(255, 255, 255, 0.06);
  border-radius: 13px;
  overflow: hidden;
  box-shadow: inset 0 1px 3px rgba(0, 0, 0, 0.3);
}

.confidence-fill {
  height: 100%;
  border-radius: 13px;
  transition: width 0.8s cubic-bezier(0.4, 0, 0.2, 1);
  min-width: 2px;
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.1);
}

.confidence-fill.glioma { background: var(--color-glioma); }
.confidence-fill.meningioma { background: var(--color-meningioma); }
.confidence-fill.pituitary { background: var(--color-pituitary); }
.confidence-fill.no_tumor { background: var(--color-no-tumor); }
.confidence-fill.schwannoma { background: var(--color-schwannoma); }
.confidence-fill.neurocytoma { background: var(--color-neurocytoma); }
.confidence-fill.carcinoma { background: var(--color-carcinoma); }
.confidence-fill.papilloma { background: var(--color-papilloma); }

.confidence-pct {
  width: 50px;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--color-text-secondary);
}

.result-meta {
  display: flex;
  gap: 1.5rem;
  font-size: 0.8rem;
  color: var(--color-text-tertiary);
  margin-bottom: 1.5rem;
}

.result-meta span {
  display: flex;
  align-items: center;
  gap: 0.3rem;
}

.result-meta svg {
  width: 14px;
  height: 14px;
}

.result-info {
  background: rgba(59, 130, 246, 0.05);
  border: 1px solid var(--color-border-light);
  border-left: 3px solid var(--color-primary-400);
  border-radius: var(--radius-sm);
  padding: 1rem 1.25rem;
  font-size: 0.9rem;
  color: var(--color-text-secondary);
  line-height: 1.7;
}

/* ===================================
   LOADING
   =================================== */

.loading-card {
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-lg);
  padding: 3rem;
  text-align: center;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

.loading-status {
  margin-top: 1rem;
  font-weight: 600;
  color: var(--color-text-primary);
  font-size: 1.05rem;
}

.loading-step {
  font-size: 0.8rem;
  color: var(--color-text-tertiary);
  margin-top: 0.5rem;
}

.progress-bar-track {
  width: 100%;
  max-width: 320px;
  height: 8px;
  background: rgba(255, 255, 255, 0.08);
  border-radius: 4px;
  margin: 1.25rem auto 0;
  overflow: hidden;
}

.progress-bar-fill {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--color-primary-400), var(--color-secondary-500));
  border-radius: 4px;
  transition: width 0.4s ease;
}

.spinner {
  animation: spin 1.2s linear infinite;
  color: var(--color-primary-500);
}

@keyframes spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

/* ===================================
   HISTORY VIEW
   =================================== */

.history-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1rem;
  margin-bottom: 2rem;
}

.history-card {
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  transition: all 0.25s ease;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

.history-card:hover {
  box-shadow: 0 6px 24px rgba(0, 0, 0, 0.3);
  border-color: rgba(59, 130, 246, 0.3);
}

.history-card-top {
  display: flex;
  gap: 1rem;
  margin-bottom: 0.75rem;
}

.history-thumb {
  width: 64px;
  height: 64px;
  border-radius: var(--radius-sm);
  object-fit: cover;
  border: 1px solid var(--color-border-light);
}

.history-card-info {
  flex: 1;
}

.history-class {
  display: inline-block;
  padding: 0.15rem 0.6rem;
  border-radius: 12px;
  font-size: 0.75rem;
  font-weight: 600;
  color: white;
  text-transform: capitalize;
  margin-bottom: 0.35rem;
}

.history-class.glioma { background: var(--color-glioma); }
.history-class.meningioma { background: var(--color-meningioma); }
.history-class.pituitary { background: var(--color-pituitary); }
.history-class.no_tumor { background: var(--color-no-tumor); }
.history-class.schwannoma { background: var(--color-schwannoma); }
.history-class.neurocytoma { background: var(--color-neurocytoma); }
.history-class.carcinoma { background: var(--color-carcinoma); }
.history-class.papilloma { background: var(--color-papilloma); }

.history-confidence {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  font-weight: 600;
}

.history-subtype {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  margin-top: 0.2rem;
}

.history-meta {
  font-size: 0.75rem;
  color: var(--color-text-tertiary);
}

.history-empty {
  text-align: center;
  padding: 3rem;
  color: var(--color-text-tertiary);
}

.history-empty svg {
  width: 48px;
  height: 48px;
  margin-bottom: 1rem;
  color: var(--color-gray-300);
}

.load-more {
  display: block;
  margin: 0 auto;
}

/* ===================================
   STATS VIEW
   =================================== */

.stats-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  margin-bottom: 2.5rem;
}

.stat-card {
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  text-align: center;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
  transition: all 0.25s ease;
}

.stat-card:hover {
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
  border-color: rgba(59, 130, 246, 0.2);
}

.stat-icon {
  margin-bottom: 0.75rem;
}

.stat-icon svg {
  width: 28px;
  height: 28px;
  color: var(--color-primary-500);
}

.stat-value {
  font-family: var(--font-heading);
  font-size: 2rem;
  font-weight: 700;
  color: var(--color-text-primary);
  margin-bottom: 0.25rem;
}

.stat-label {
  font-size: 0.85rem;
  color: var(--color-text-tertiary);
}

.distribution-section {
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-md);
  padding: 1.5rem;
}

.distribution-bars {
  margin-top: 1rem;
}

.dist-row {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 0.75rem;
}

.dist-label {
  width: 100px;
  font-size: 0.85rem;
  font-weight: 500;
  text-transform: capitalize;
  text-align: right;
  color: var(--color-text-secondary);
}

.dist-track {
  flex: 1;
  height: 28px;
  background: rgba(255, 255, 255, 0.06);
  border-radius: 14px;
  overflow: hidden;
}

.dist-fill {
  height: 100%;
  border-radius: 14px;
  transition: width 0.6s ease;
  min-width: 2px;
}

.dist-fill.glioma { background: var(--color-glioma); }
.dist-fill.meningioma { background: var(--color-meningioma); }
.dist-fill.pituitary { background: var(--color-pituitary); }
.dist-fill.no_tumor { background: var(--color-no-tumor); }
.dist-fill.schwannoma { background: var(--color-schwannoma); }
.dist-fill.neurocytoma { background: var(--color-neurocytoma); }
.dist-fill.carcinoma { background: var(--color-carcinoma); }
.dist-fill.papilloma { background: var(--color-papilloma); }

.dist-count {
  width: 40px;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--color-text-secondary);
}

/* ===================================
   SECOND OPINION
   =================================== */

.second-opinion {
  display: flex;
  align-items: flex-start;
  gap: 0.6rem;
  background: rgba(251, 191, 36, 0.08);
  border: 1px solid rgba(251, 191, 36, 0.2);
  border-radius: var(--radius-sm);
  padding: 0.75rem 1rem;
  margin-top: 1rem;
  font-size: 0.85rem;
  color: #FBBF24;
  line-height: 1.6;
}

.second-opinion svg {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
  margin-top: 2px;
}

/* ===================================
   SUBTYPE SECTION
   =================================== */

.subtype-section {
  border-top: 2px solid var(--color-glioma);
  margin-top: 1.5rem;
  padding-top: 1.5rem;
}

.subtype-header {
  margin-bottom: 1rem;
}

.subtype-header h3 {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 1rem;
  color: var(--color-glioma);
}

.subtype-header h3 svg {
  width: 20px;
  height: 20px;
}

.subtype-section .result-info {
  margin-top: 1rem;
}

.subtype-section .confidence-label {
  width: 140px;
}

/* ===================================
   EXPECTED MRIS
   =================================== */

.expected-mris {
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  margin-bottom: 1.5rem;
}

.expected-mris h3 {
  font-size: 0.95rem;
  margin-bottom: 0.4rem;
}

.expected-mris > p {
  font-size: 0.8rem;
  color: var(--color-text-tertiary);
  margin-bottom: 1rem;
}

.expected-mris-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.75rem;
}

.expected-mri-item {
  text-align: center;
}

.expected-mri-item img {
  width: 100%;
  aspect-ratio: 1;
  object-fit: cover;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border-light);
  margin-bottom: 0.4rem;
}

.expected-mri-label {
  display: inline-block;
  padding: 0.15rem 0.5rem;
  border-radius: 10px;
  font-size: 0.7rem;
  font-weight: 600;
  color: white;
}

.expected-mri-label.glioma { background: var(--color-glioma); }
.expected-mri-label.meningioma { background: var(--color-meningioma); }
.expected-mri-label.pituitary { background: var(--color-pituitary); }
.expected-mri-label.no_tumor { background: var(--color-no-tumor); }
.expected-mri-label.schwannoma { background: var(--color-schwannoma); }
.expected-mri-label.neurocytoma { background: var(--color-neurocytoma); }
.expected-mri-label.carcinoma { background: var(--color-carcinoma); }
.expected-mri-label.papilloma { background: var(--color-papilloma); }

/* ===================================
   DISCLAIMER
   =================================== */

.disclaimer {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  background: rgba(251, 191, 36, 0.06);
  border: 1px solid rgba(251, 191, 36, 0.18);
  border-radius: var(--radius-sm);
  padding: 0.7rem 1rem;
  margin-bottom: 1.5rem;
  font-size: 0.85rem;
  color: #FBBF24;
}

.disclaimer svg {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
}

/* ===================================
   MODAL
   =================================== */

.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.7);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 200;
  padding: 1.5rem;
  backdrop-filter: blur(4px);
}

.modal-overlay.hidden {
  display: none !important;
}

.modal {
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-lg);
  padding: 2rem;
  max-width: 600px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: 0 24px 48px rgba(0, 0, 0, 0.4);
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.5rem;
}

.modal-image-row {
  text-align: center;
  margin-bottom: 1.5rem;
}

.modal-image-row img {
  max-height: 200px;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border-light);
}

.history-card {
  cursor: pointer;
}

/* ===================================
   ABOUT VIEW
   =================================== */

.about-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
  margin-bottom: 2.5rem;
}

.about-card:last-child:nth-child(odd) {
  grid-column: 1 / -1;
}

.about-card {
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
  transition: all 0.25s ease;
}

.about-card:hover {
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
  border-color: rgba(59, 130, 246, 0.2);
}

.about-card h3 {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 1rem;
  margin-bottom: 0.75rem;
  color: var(--color-text-primary);
}

.about-card h3 svg {
  width: 20px;
  height: 20px;
  color: var(--color-primary-500);
}

.about-card p {
  font-size: 0.9rem;
  color: var(--color-text-secondary);
  line-height: 1.7;
}

.tech-stack-section {
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-md);
  padding: 1.5rem;
}

.tech-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 0.75rem;
}

.tech-tag {
  display: inline-block;
  padding: 0.35rem 0.9rem;
  background: rgba(59, 130, 246, 0.08);
  border: 1px solid rgba(59, 130, 246, 0.2);
  border-radius: 20px;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--color-primary-500);
}

/* ===================================
   FOOTER
   =================================== */

.footer {
  border-top: 1px solid var(--color-border-light);
  padding: 1.5rem 0;
  margin-top: auto;
  background: var(--color-bg-primary);
}

.footer-content {
  text-align: center;
  font-size: 0.85rem;
  color: var(--color-text-tertiary);
}

.footer-content a {
  color: var(--color-primary-500);
  font-weight: 500;
}

/* ===================================
   RESPONSIVE
   =================================== */

@media (max-width: 768px) {
  h1 {
    font-size: 1.5rem;
  }

  .header-content {
    flex-wrap: wrap;
    gap: 0.75rem;
  }

  .nav-tabs {
    order: 3;
    width: 100%;
    justify-content: center;
  }

  .back-link {
    margin-left: auto;
  }

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

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

  .sample-buttons {
    gap: 0.4rem;
  }

  .confidence-label {
    width: 80px;
  }

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

  .expected-mris-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .result-images-row {
    flex-direction: column;
    align-items: center;
  }
}

/* ===================================
   REDUCED MOTION
   =================================== */

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

  .confidence-fill {
    transition: none;
  }

  .spinner {
    animation: none;
  }
}