/* ── Reset & Base ── */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: system-ui, -apple-system, sans-serif;
  background: #f5f5f5;
  color: #1a1a1a;
  line-height: 1.6;
}

/* ── Layout ── */
.container {
  max-width: 1024px;
  margin: 0 auto;
  padding: 2rem 1.5rem;
}

/* ── Header ── */
.header {
  text-align: center;
  margin-bottom: 2rem;
}

.header h1 {
  font-size: 2rem;
  color: #d32f2f;
}

.subtitle {
  color: #666;
  font-size: 1rem;
  margin-top: 0.3rem;
}

.back-link {
  font-size: 0.9rem;
  color: #1976d2;
}

/* ── Grid landing ── */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 1.2rem;
  margin-bottom: 2rem;
}

.card {
  background: #fff;
  border-radius: 12px;
  padding: 1.8rem;
  text-align: center;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
  transition: transform 0.2s, box-shadow 0.2s;
  text-decoration: none;
  color: inherit;
  display: block;
}

.card:hover {
  transform: translateY(-3px);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.1);
  text-decoration: none;
}

.card-icon {
  font-size: 2.5rem;
  display: block;
  margin-bottom: 0.8rem;
}

.card h2 {
  font-size: 1.2rem;
  color: #1a1a1a;
  margin-bottom: 0.4rem;
}

.card p {
  font-size: 0.85rem;
  color: #666;
}

/* ── Tracking ── */
.tracking-form {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
}

.tracking-form input {
  flex: 1;
  padding: 0.8rem 1rem;
  border: 2px solid #ddd;
  border-radius: 8px;
  font-size: 1rem;
  outline: none;
  transition: border-color 0.2s;
}

.tracking-form input:focus {
  border-color: #1976d2;
}

.tracking-form button {
  padding: 0.8rem 1.5rem;
  background: #d32f2f;
  color: #fff;
  border: none;
  border-radius: 8px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
}

.tracking-form button:hover {
  background: #b71c1c;
}

.tracking-result {
  background: #fff;
  border-radius: 12px;
  padding: 1.5rem;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
}

.tracking-result.hidden,
.tracking-error.hidden {
  display: none;
}

.result-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1rem;
}

.result-type {
  font-weight: 700;
  font-size: 1.1rem;
}

.tracking-number {
  font-family: monospace;
  font-size: 0.9rem;
  color: #666;
}

.result-status {
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 1rem;
  padding: 0.5rem;
  background: #f5f5f5;
  border-radius: 8px;
  text-align: center;
}

.result-details {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 1rem;
}

.detail label {
  display: block;
  font-size: 0.75rem;
  font-weight: 600;
  color: #888;
  text-transform: uppercase;
  margin-bottom: 0.3rem;
}

.detail span {
  font-size: 1rem;
}

.tracking-error {
  background: #ffebee;
  color: #c62828;
  border-radius: 8px;
  padding: 1rem;
  text-align: center;
  font-weight: 600;
}

/* ── Footer ── */
.footer {
  text-align: center;
  font-size: 0.85rem;
  color: #999;
  margin-top: 2rem;
}