:root {
  --bg: #f4f7fb;
  --card: #ffffff;
  --text: #1f2937;
  --muted: #6b7280;
  --border: #d7dee8;
  --accent: #2563eb;
  --accent-hover: #1d4ed8;
  --danger: #dc2626;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: linear-gradient(180deg, #f8fbff 0%, #eef3fa 100%);
  color: var(--text);
}

.app {
  width: min(1100px, 92vw);
  margin: 0 auto;
  padding: 2rem 0 3rem;
}

.header h1 {
  margin: 0;
  font-size: clamp(1.8rem, 3vw, 2.5rem);
}

.header p {
  margin: 0.5rem 0 0;
  color: var(--muted);
}

.search-section {
  display: flex;
  gap: 0.75rem;
  margin-top: 1.5rem;
  flex-wrap: wrap;
}

.search-section input {
  flex: 1 1 340px;
  padding: 0.9rem 1rem;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: #ffffff;
  color: var(--text);
  outline: none;
}

.search-section input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(47, 129, 247, 0.2);
}

.search-section button {
  border: 0;
  border-radius: 12px;
  padding: 0.9rem 1.3rem;
  cursor: pointer;
  background: var(--accent);
  color: white;
  font-weight: 600;
}

.search-section button:hover {
  background: var(--accent-hover);
}

.status {
  margin: 1.2rem 0;
  min-height: 1.5rem;
  color: var(--muted);
}

.status.error {
  color: var(--danger);
}

.results {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

.card {
  flex: 1 1 310px;
  display: flex;
  flex-direction: column;
  gap: 0.7rem;
  padding: 1rem;
  border-radius: 14px;
  border: 1px solid var(--border);
  background: var(--card);
  transition: transform 0.15s ease, border-color 0.15s ease;
}

.card:hover {
  transform: translateY(-2px);
  border-color: #bfc9d8;
}

.card h3 {
  margin: 0;
  line-height: 1.4;
  font-size: 1.05rem;
}

.card .meta {
  color: var(--muted);
  font-size: 0.88rem;
}

.card p {
  margin: 0;
  color: #374151;
  line-height: 1.5;
}

.card a {
  margin-top: auto;
  display: inline-block;
  text-decoration: none;
  padding: 0.55rem 0.85rem;
  border-radius: 10px;
  border: 1px solid var(--border);
  color: var(--text);
  width: fit-content;
}

.card a:hover {
  border-color: var(--accent);
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

@media (max-width: 640px) {
  .search-section {
    flex-direction: column;
  }

  .search-section button {
    width: 100%;
  }
}