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

:root {
  --bg: #f4f6f9;
  --surface: #ffffff;
  --border: #e2e8f0;
  --primary: #c0392b;
  --primary-dark: #96281b;
  --text: #1a202c;
  --muted: #718096;
  --radius: 12px;
  --shadow: 0 4px 24px rgba(0,0,0,0.08);
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

header {
  background: var(--primary);
  color: #fff;
  text-align: center;
  padding: 2rem 1rem 1.6rem;
}

header h1 {
  font-size: 2rem;
  font-weight: 700;
  letter-spacing: -0.5px;
}

header p {
  margin-top: 0.4rem;
  font-size: 0.95rem;
  opacity: 0.85;
}

main {
  flex: 1;
  max-width: 640px;
  width: 100%;
  margin: 2.5rem auto;
  padding: 0 1rem;
}

.search-card {
  background: var(--surface);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 2rem;
}

.search-card label {
  display: block;
  font-weight: 600;
  margin-bottom: 0.6rem;
}

.input-row {
  display: flex;
  gap: 0.6rem;
}

.input-row input {
  flex: 1;
  padding: 0.75rem 1rem;
  border: 2px solid var(--border);
  border-radius: 8px;
  font-size: 1rem;
  transition: border-color 0.2s;
  outline: none;
}

.input-row input:focus {
  border-color: var(--primary);
}

.input-row button {
  padding: 0.75rem 1.4rem;
  background: var(--primary);
  color: #fff;
  border: none;
  border-radius: 8px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.2s;
  white-space: nowrap;
}

.input-row button:hover {
  background: var(--primary-dark);
}

.hint {
  margin-top: 0.6rem;
  font-size: 0.82rem;
  color: var(--muted);
}

/* Results */
#results {
  margin-top: 2rem;
}

.results-heading {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 0.8rem;
}

.carrier-card {
  background: var(--surface);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1.1rem 1.4rem;
  margin-bottom: 0.8rem;
  display: flex;
  align-items: center;
  gap: 1rem;
}

.carrier-icon {
  width: 44px;
  height: 44px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  flex-shrink: 0;
}

.carrier-info {
  flex: 1;
}

.carrier-name {
  font-weight: 700;
  font-size: 1rem;
}

.carrier-match {
  font-size: 0.8rem;
  color: var(--muted);
  margin-top: 0.15rem;
}

.carrier-link {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.5rem 1rem;
  background: var(--primary);
  color: #fff;
  border-radius: 7px;
  text-decoration: none;
  font-size: 0.88rem;
  font-weight: 600;
  transition: background 0.2s;
  white-space: nowrap;
}

.carrier-link:hover {
  background: var(--primary-dark);
}

.carrier-link svg {
  width: 14px;
  height: 14px;
}

.badge-detected {
  display: inline-block;
  background: #d4edda;
  color: #155724;
  border-radius: 20px;
  padding: 0.1rem 0.55rem;
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-left: 0.4rem;
  vertical-align: middle;
}

.divider {
  text-align: center;
  color: var(--muted);
  font-size: 0.82rem;
  margin: 1.2rem 0 0.8rem;
  position: relative;
}

.divider::before,
.divider::after {
  content: "";
  display: inline-block;
  width: 30%;
  height: 1px;
  background: var(--border);
  vertical-align: middle;
  margin: 0 0.6rem;
}

.error-msg {
  background: #fff5f5;
  color: #c53030;
  border: 1px solid #fed7d7;
  border-radius: 8px;
  padding: 0.85rem 1rem;
  font-size: 0.9rem;
  margin-top: 1rem;
}

footer {
  text-align: center;
  padding: 1.5rem 1rem;
  font-size: 0.8rem;
  color: var(--muted);
}

@media (max-width: 480px) {
  header h1 { font-size: 1.5rem; }
  .input-row { flex-direction: column; }
  .carrier-card { flex-wrap: wrap; }
  .carrier-link { width: 100%; justify-content: center; }
}