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

:root {
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --danger: #ef4444;
  --success: #22c55e;
  --warning: #eab308;
  --bg: #f0f4f8;
  --card: #ffffff;
  --text: #1e293b;
  --text-muted: #64748b;
  --border: #e2e8f0;
  --radius: 12px;
  --shadow: 0 4px 24px rgba(0, 0, 0, 0.08);
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 2rem 1rem;
}

header {
  text-align: center;
  margin-bottom: 2rem;
}

header h1 {
  font-size: 2rem;
  font-weight: 700;
  background: linear-gradient(135deg, var(--primary), #7c3aed);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

header p {
  color: var(--text-muted);
  margin-top: 0.25rem;
}

main {
  width: 100%;
  max-width: 960px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
}

.card {
  background: var(--card);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1.5rem;
}

.card h2 {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 1rem;
  color: var(--text);
}

.upload-area {
  position: relative;
  border: 2px dashed var(--border);
  border-radius: var(--radius);
  padding: 2rem 1rem;
  text-align: center;
  cursor: pointer;
  transition: border-color 0.2s, background 0.2s;
}

.upload-area:hover,
.upload-area.dragover {
  border-color: var(--primary);
  background: #f8faff;
}

.upload-area.has-image {
  border-color: var(--success);
  border-style: solid;
  padding: 0.5rem;
}

.upload-area .icon {
  font-size: 2.5rem;
  margin-bottom: 0.5rem;
}

.upload-area p {
  color: var(--text-muted);
  font-size: 0.9rem;
}

.upload-area input[type="file"] {
  position: absolute;
  inset: 0;
  opacity: 0;
  cursor: pointer;
}

#preview {
  max-width: 100%;
  max-height: 250px;
  object-fit: contain;
  border-radius: 8px;
  display: none;
}

#preview.visible {
  display: block;
}

.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.form-group label {
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-muted);
}

.form-group input,
.form-group select {
  padding: 0.5rem 0.75rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 0.9rem;
  background: var(--card);
  color: var(--text);
  transition: border-color 0.2s;
}

.form-group input:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.btn-predict {
  grid-column: 1 / -1;
  padding: 0.75rem;
  background: var(--primary);
  color: white;
  border: none;
  border-radius: 8px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.2s;
  margin-top: 0.5rem;
}

.btn-predict:hover {
  background: var(--primary-dark);
}

.btn-predict:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.loading {
  display: none;
  text-align: center;
  padding: 2rem 0;
}

.loading.visible {
  display: block;
}

.spinner {
  width: 36px;
  height: 36px;
  border: 4px solid var(--border);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  margin: 0 auto 0.5rem;
}

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

.results {
  display: none;
}

.results.visible {
  display: block;
}

.result-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1.25rem;
  border-radius: 999px;
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 1rem;
}

.result-badge.rain {
  background: #fef2f2;
  color: var(--danger);
}

.result-badge.no-rain {
  background: #f0fdf4;
  color: var(--success);
}

.metric-group {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.metric {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.metric-label {
  font-size: 0.8rem;
  color: var(--text-muted);
  font-weight: 500;
}

.metric-value {
  font-size: 1.1rem;
  font-weight: 600;
}

.bar-track {
  width: 100%;
  height: 8px;
  background: var(--border);
  border-radius: 999px;
  overflow: hidden;
}

.bar-fill {
  height: 100%;
  border-radius: 999px;
  transition: width 0.5s ease;
  width: 0%;
}

.bar-fill.rain {
  background: linear-gradient(90deg, var(--danger), #f97316);
}

.bar-fill.cloud {
  background: linear-gradient(90deg, var(--primary), #7c3aed);
}

.error {
  display: none;
  padding: 0.75rem;
  background: #fef2f2;
  color: var(--danger);
  border-radius: 8px;
  font-size: 0.85rem;
  margin-top: 1rem;
}

.error.visible {
  display: block;
}

.btn-download {
  display: inline-block;
  margin-top: 1rem;
  padding: 0.6rem 1.25rem;
  background: var(--success);
  color: white;
  border: none;
  border-radius: 8px;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.2s;
}

.btn-download:hover {
  background: #16a34a;
}

footer {
  margin-top: 2rem;
  font-size: 0.8rem;
  color: var(--text-muted);
}

@media (max-width: 700px) {
  main {
    grid-template-columns: 1fr;
  }
}