/* ============================================
   Cattle Breed Classifier – Design System
   Premium dark theme with warm amber accents
   ============================================ */

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

:root {
  /* Primary palette */
  --color-bg-primary: #1f2330;
  --color-bg-secondary: #2c3144;
  --color-bg-card: #373e56;
  --color-bg-card-hover: #434b68;
  --color-bg-glass: rgba(118, 127, 158, 0.3);
  --color-bg-input: #2c3144;

  /* Accent */
  --color-accent: #DAA464;
  --color-accent-light: #DEC384;
  --color-accent-dark: #b6854d;
  --color-accent-glow: rgba(218, 164, 100, 0.2);

  /* Success/Error */
  --color-success: #10b981;
  --color-error: #ef4444;
  --color-warning: #DAA464;
  --color-info: #767F9E;

  /* Text */
  --color-text-primary: #E8DDB4;
  --color-text-secondary: #DEC384;
  --color-text-muted: #767F9E;

  /* Borders */
  --color-border: rgba(118, 127, 158, 0.3);
  --color-border-accent: rgba(218, 164, 100, 0.4);

  /* Gradients */
  --gradient-hero: linear-gradient(135deg, #1f2330 0%, #373e56 50%, #2c3144 100%);
  --gradient-accent: linear-gradient(135deg, #DEC384 0%, #DAA464 100%);
  --gradient-card: linear-gradient(145deg, rgba(55, 62, 86, 0.9), rgba(44, 49, 68, 0.7));

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 14px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 10px 40px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 30px rgba(218, 164, 100, 0.15);

  /* Spacing */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;

  /* Typography */
  --font-heading: 'Outfit', sans-serif;
  --font-body: 'Inter', sans-serif;

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-normal: 250ms ease;
  --transition-slow: 400ms cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  background: var(--color-bg-primary);
  color: var(--color-text-primary);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  min-height: 100vh;
}

#root {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ============ TYPOGRAPHY ============ */

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.2;
}

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

a:hover { color: var(--color-accent-light); }

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

.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(10, 14, 23, 0.85);
  backdrop-filter: blur(16px) saturate(180%);
  border-bottom: 1px solid var(--color-border);
  padding: 0 2rem;
}

.navbar-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.navbar-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-text-primary);
}

.navbar-brand span {
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.nav-links {
  display: flex;
  gap: 6px;
  list-style: none;
}

.nav-links a {
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  color: var(--color-text-secondary);
  font-weight: 500;
  font-size: 0.9rem;
  transition: all var(--transition-fast);
}

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

/* ============ LAYOUT ============ */

.page {
  flex: 1;
  max-width: 1200px;
  width: 100%;
  margin: 0 auto;
  padding: 2rem;
}

.section-title {
  font-size: 2rem;
  margin-bottom: 0.5rem;
}

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

/* ============ CARDS ============ */

.card {
  background: var(--gradient-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  backdrop-filter: blur(10px);
  transition: all var(--transition-normal);
}

.card:hover {
  border-color: var(--color-border-accent);
  box-shadow: var(--shadow-glow);
  transform: translateY(-2px);
}

.glass-card {
  background: var(--color-bg-glass);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(16px);
  padding: 2rem;
}

/* ============ HERO SECTION ============ */

.hero {
  text-align: center;
  padding: 4rem 0 3rem;
}

.hero h1 {
  font-size: 3.2rem;
  font-weight: 800;
  margin-bottom: 1rem;
  letter-spacing: -0.02em;
}

.hero h1 .accent {
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero p {
  font-size: 1.15rem;
  color: var(--color-text-secondary);
  max-width: 600px;
  margin: 0 auto 2rem;
}

.hero-cta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  background: var(--gradient-accent);
  color: #000;
  font-weight: 600;
  font-size: 1rem;
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-normal);
  box-shadow: 0 4px 20px rgba(245, 158, 11, 0.3);
}

.hero-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 30px rgba(245, 158, 11, 0.4);
}

/* ============ FEATURES GRID ============ */

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
  margin-top: 3rem;
}

.feature-card {
  text-align: center;
  padding: 2rem 1.5rem;
}

.feature-icon {
  font-size: 2.5rem;
  margin-bottom: 1rem;
}

.feature-card h3 {
  font-size: 1.1rem;
  margin-bottom: 0.5rem;
}

.feature-card p {
  color: var(--color-text-secondary);
  font-size: 0.9rem;
}

/* ============ PREDICT PAGE ============ */

.predict-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  margin-top: 1.5rem;
}

@media (max-width: 768px) {
  .predict-layout { grid-template-columns: 1fr; }
}

.input-tabs {
  display: flex;
  gap: 4px;
  background: var(--color-bg-primary);
  padding: 4px;
  border-radius: var(--radius-md);
  margin-bottom: 1.5rem;
}

.input-tab {
  flex: 1;
  padding: 10px 16px;
  border: none;
  border-radius: var(--radius-sm);
  background: transparent;
  color: var(--color-text-secondary);
  font-weight: 500;
  font-size: 0.85rem;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.input-tab.active {
  background: var(--color-accent-glow);
  color: var(--color-accent);
}

/* Upload zone */
.upload-zone {
  border: 2px dashed var(--color-border);
  border-radius: var(--radius-lg);
  padding: 3rem 2rem;
  text-align: center;
  cursor: pointer;
  transition: all var(--transition-normal);
  background: var(--color-bg-input);
}

.upload-zone:hover,
.upload-zone.drag-over {
  border-color: var(--color-accent);
  background: var(--color-accent-glow);
}

.upload-zone .icon { font-size: 3rem; margin-bottom: 1rem; }
.upload-zone p { color: var(--color-text-secondary); }
.upload-zone .hint { font-size: 0.8rem; color: var(--color-text-muted); margin-top: 0.5rem; }

/* Image preview */
.image-preview {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin-top: 1rem;
}

.image-preview img {
  width: 100%;
  max-height: 350px;
  object-fit: contain;
  border-radius: var(--radius-lg);
  background: var(--color-bg-input);
}

.image-preview .remove-btn {
  position: absolute;
  top: 8px;
  right: 8px;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  border: none;
  background: rgba(0,0,0,0.7);
  color: #fff;
  font-size: 1rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* URL Input */
.url-input-group {
  display: flex;
  gap: 8px;
  margin-top: 0.5rem;
}

.url-input-group input {
  flex: 1;
  padding: 12px 16px;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  background: var(--color-bg-input);
  color: var(--color-text-primary);
  font-size: 0.9rem;
  outline: none;
  transition: border-color var(--transition-fast);
}

.url-input-group input:focus {
  border-color: var(--color-accent);
}

/* Buttons */
.btn-primary {
  padding: 12px 28px;
  background: var(--gradient-accent);
  color: #000;
  font-weight: 600;
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  font-size: 0.95rem;
  transition: all var(--transition-normal);
}

.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 20px rgba(245, 158, 11, 0.3);
}

.btn-primary:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}

.btn-secondary {
  padding: 10px 20px;
  background: var(--color-bg-card);
  color: var(--color-text-primary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  cursor: pointer;
  font-size: 0.9rem;
  transition: all var(--transition-fast);
}

.btn-secondary:hover {
  border-color: var(--color-accent);
}

.predict-btn {
  width: 100%;
  margin-top: 1.5rem;
  padding: 14px;
  font-size: 1rem;
}

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

.result-card {
  animation: slideIn 0.4s var(--transition-slow);
}

@keyframes slideIn {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

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

.result-breed-name {
  font-size: 1.6rem;
  font-weight: 700;
  font-family: var(--font-heading);
}

.result-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  border-radius: 20px;
  font-size: 0.8rem;
  font-weight: 600;
}

.result-badge.high { background: rgba(16, 185, 129, 0.15); color: var(--color-success); }
.result-badge.medium { background: rgba(245, 158, 11, 0.15); color: var(--color-warning); }
.result-badge.low { background: rgba(239, 68, 68, 0.15); color: var(--color-error); }

/* Confidence bar */
.confidence-bar-container {
  margin-bottom: 1.5rem;
}

.confidence-bar-label {
  display: flex;
  justify-content: space-between;
  font-size: 0.85rem;
  color: var(--color-text-secondary);
  margin-bottom: 6px;
}

.confidence-bar {
  height: 8px;
  background: var(--color-bg-primary);
  border-radius: 4px;
  overflow: hidden;
}

.confidence-bar-fill {
  height: 100%;
  border-radius: 4px;
  background: var(--gradient-accent);
  transition: width 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Top-K predictions */
.topk-list {
  margin-bottom: 1.5rem;
}

.topk-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 0;
  border-bottom: 1px solid var(--color-border);
}

.topk-item:last-child { border-bottom: none; }

.topk-rank {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  font-weight: 600;
  background: var(--color-bg-primary);
  color: var(--color-text-secondary);
  margin-right: 12px;
}

.topk-rank.first { background: var(--color-accent-glow); color: var(--color-accent); }

.topk-name { flex: 1; font-weight: 500; }
.topk-conf { color: var(--color-text-secondary); font-size: 0.9rem; }

/* Breed info grid */
.breed-info-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}

.breed-info-item {
  padding: 12px;
  background: var(--color-bg-primary);
  border-radius: var(--radius-sm);
}

.breed-info-label {
  font-size: 0.75rem;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 4px;
}

.breed-info-value {
  font-weight: 600;
  font-size: 0.95rem;
}

/* Warning */
.prediction-warning {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 12px 16px;
  background: rgba(245, 158, 11, 0.1);
  border: 1px solid rgba(245, 158, 11, 0.2);
  border-radius: var(--radius-md);
  margin-top: 1rem;
  font-size: 0.85rem;
  color: var(--color-warning);
}

/* ============ BREED EXPLORER ============ */

.breed-filters {
  display: flex;
  gap: 12px;
  margin-bottom: 2rem;
  flex-wrap: wrap;
}

.breed-filters input,
.breed-filters select {
  padding: 10px 16px;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  background: var(--color-bg-input);
  color: var(--color-text-primary);
  font-size: 0.9rem;
  outline: none;
}

.breed-filters input:focus,
.breed-filters select:focus {
  border-color: var(--color-accent);
}

.breeds-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 1.5rem;
}

.breed-card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.75rem;
}

.breed-card-name {
  font-size: 1.1rem;
  font-weight: 600;
  font-family: var(--font-heading);
}

.breed-type-badge {
  padding: 4px 10px;
  border-radius: 12px;
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.breed-type-badge.cow {
  background: rgba(59, 130, 246, 0.15);
  color: var(--color-info);
}

.breed-type-badge.buffalo {
  background: rgba(139, 92, 246, 0.15);
  color: #8b5cf6;
}

.breed-card-detail {
  display: flex;
  justify-content: space-between;
  padding: 6px 0;
  font-size: 0.85rem;
}

.breed-card-detail .label { color: var(--color-text-muted); }
.breed-card-detail .value { font-weight: 500; }

.breed-card-description {
  margin-top: 0.75rem;
  color: var(--color-text-secondary);
  font-size: 0.85rem;
  line-height: 1.5;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* ============ CAMERA ============ */

.camera-container {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: #000;
}

.camera-container video {
  width: 100%;
  max-height: 350px;
  object-fit: cover;
}

.camera-controls {
  display: flex;
  justify-content: center;
  gap: 12px;
  margin-top: 1rem;
}

.camera-capture-btn {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  border: 3px solid var(--color-accent);
  background: transparent;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
}

.camera-capture-btn:hover {
  background: var(--color-accent-glow);
}

.camera-capture-btn::after {
  content: '';
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--color-accent);
}

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

.loading-spinner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
  padding: 3rem;
}

.spinner {
  width: 40px;
  height: 40px;
  border: 3px solid var(--color-border);
  border-top-color: var(--color-accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

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

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

.footer {
  border-top: 1px solid var(--color-border);
  padding: 2rem;
  text-align: center;
  color: var(--color-text-muted);
  font-size: 0.85rem;
  margin-top: auto;
}

.footer a { color: var(--color-accent); }

/* ============ ABOUT PAGE ============ */

.about-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.5rem;
  margin-top: 2rem;
}

.about-card h3 {
  font-size: 1.1rem;
  margin-bottom: 0.75rem;
  color: var(--color-accent);
}

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

.about-card ul {
  list-style: none;
  padding: 0;
}

.about-card li::before {
  content: '→ ';
  color: var(--color-accent);
}

/* Image quality tips */
.tips-box {
  background: rgba(59, 130, 246, 0.08);
  border: 1px solid rgba(59, 130, 246, 0.2);
  border-radius: var(--radius-md);
  padding: 1rem 1.25rem;
  margin-top: 1rem;
}

.tips-box h4 {
  color: var(--color-info);
  font-size: 0.9rem;
  margin-bottom: 0.5rem;
}

.tips-box li {
  color: var(--color-text-secondary);
  font-size: 0.8rem;
  margin-bottom: 4px;
}

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

@media (max-width: 768px) {
  .hero h1 { font-size: 2rem; }
  .page { padding: 1rem; }
  .breed-info-grid { grid-template-columns: 1fr; }
  .navbar-inner { padding: 0; }
  .nav-links a { padding: 8px 10px; font-size: 0.8rem; }
  .features-grid { grid-template-columns: 1fr; }
  .breeds-grid { grid-template-columns: 1fr; }
}