:root {
  --bg: #f3f5f9;
  --surface: #ffffff;
  --text: #1f2a37;
  --muted: #5a6b7d;
  --brand: #2f6ea5;
  --brand-strong: #245985;
  --border: #d6dee8;
  --shadow: 0 8px 20px rgba(23, 44, 69, 0.1);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  color: var(--text);
  font-family: "Space Grotesk", "Segoe UI", sans-serif;
  background: var(--bg);
}

.page {
  max-width: 1050px;
  margin: 0 auto;
  padding: 2rem 1rem 3rem;
}

.hero {
  margin-bottom: 1rem;
}

.hero h1 {
  margin: 0;
  font-size: clamp(1.8rem, 4vw, 3rem);
  letter-spacing: -0.03em;
}

.hero p {
  margin-top: 0.5rem;
  color: var(--muted);
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  box-shadow: var(--shadow);
  padding: 1rem;
  margin-top: 1rem;
}

.controls form {
  display: grid;
  gap: 0.75rem;
}

.mode-group {
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 0.75rem;
  display: grid;
  gap: 0.5rem;
  background: #f7f9fc;
}

.mode-group legend {
  font-weight: 700;
  padding: 0 0.4rem;
}

.mode-option {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-weight: 600;
  color: var(--text);
}

.mode-option input {
  accent-color: var(--brand);
}

.k-control {
  gap: 0.4rem;
}

.k-slider {
  display: flex;
  align-items: center;
  gap: 0.8rem;
}

.k-slider input[type="range"] {
  width: min(320px, 100%);
  accent-color: var(--brand);
}

#knn-k-value {
  font-weight: 700;
  min-width: 2ch;
  text-align: right;
}

label {
  font-weight: 700;
}

input[type="file"] {
  border: 1px dashed var(--border);
  border-radius: 10px;
  padding: 0.7rem;
  background: #f8fbff;
}

button {
  width: fit-content;
  border: none;
  border-radius: 10px;
  background: var(--brand);
  color: #fff;
  font-weight: 700;
  padding: 0.7rem 1rem;
  cursor: pointer;
  transition: background 160ms ease;
}

button:hover {
  background: var(--brand-strong);
}

#status {
  margin-top: 0.75rem;
  color: var(--muted);
  min-height: 1.2rem;
}

#time {
  margin-top: 0.75rem;
  color: var(--muted);
  min-height: 1.2rem;
}

.preview-wrap img {
  width: min(100%, 280px);
  aspect-ratio: 1;
  object-fit: cover;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: #e8eef5;
}

.preview-wrap h2 {
  margin-bottom: 0.75rem;
  padding-top: 0;
  margin-top: 0;
}

.results-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 0.9rem;
}

.result-card {
  position: relative;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
  animation: rise 260ms ease both;
}

.result-media {
  position: relative;
}

.result-image {
  width: 100%;
  aspect-ratio: 1;
  object-fit: cover;
  background: #eaf1f7;
}

.result-overlay {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  background: linear-gradient(150deg, rgba(31, 42, 55, 0.65), rgba(31, 42, 55, 0.15));
  opacity: 0;
  transition: opacity 180ms ease;
  pointer-events: none;
}

.result-media:hover .result-overlay,
.result-media:focus-within .result-overlay {
  opacity: 1;
  pointer-events: auto;
}

.result-open {
  background: #ffffff;
  color: var(--text);
  border: 1px solid rgba(31, 42, 55, 0.2);
  box-shadow: 0 8px 18px rgba(0, 0, 0, 0.18);
}

.result-open:hover {
  background: #f1f5f9;
}

.result-meta {
  padding: 0.6rem;
  display: grid;
  gap: 0.2rem;
}

.result-score {
  font-weight: 700;
}

.result-src {
  color: var(--muted);
  font-size: 0.9rem;
}

@keyframes rise {
  from {
    transform: translateY(8px);
    opacity: 0;
  }
  to {
    transform: translateY(0);
    opacity: 1;
  }
}

@media (max-width: 600px) {
  .page {
    padding-top: 1.2rem;
  }
}