:root {
  --primary-color: #3498db;
  --secondary-color: #2980b9;
  --accent-color: #f39c12;
  --dark-bg: #0f172a;
  --light-bg: #f5f7fa;
  --text-color: #34495e;
  --border-color: #dbe1e8;
  --border-radius: 8px;
  --box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
  --card-bg: #ffffff;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: 'Segoe UI','PingFang SC','Microsoft YaHei',sans-serif; line-height: 1.6; color: var(--text-color); background: var(--light-bg); }
.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; min-height: 100vh; display: flex; flex-direction: column; }

/* Header */
header { padding: 30px 0; text-align: center; }
.logo { display: flex; align-items: center; justify-content: center; margin-bottom: 12px; }
.rocket-logo { height: 60px; margin-right: 12px; }
.logo h1 { font-size: 32px; color: var(--primary-color); font-weight: 700; }
.logo h1 span { display: block; font-size: 18px; color: var(--accent-color); font-weight: 400; }
.subtitle { color: #666; margin-bottom: 20px; }

/* Search */
main { flex: 1; padding: 20px 0; }
.search-section { background: var(--card-bg); border-radius: var(--border-radius); padding: 24px; box-shadow: var(--box-shadow); margin-bottom: 24px; text-align: center; }
.input-group { display: flex; max-width: 720px; margin: 0 auto; }
.input-group input { flex: 1; padding: 14px 16px; font-size: 16px; border: 2px solid var(--border-color); border-right: none; border-radius: var(--border-radius) 0 0 var(--border-radius); outline: none; }
.input-group button { padding: 14px 24px; background: var(--primary-color); color: #fff; border: none; border-radius: 0 var(--border-radius) var(--border-radius) 0; font-weight: 600; cursor: pointer; }
.input-group button:hover { background: var(--secondary-color); }
.quick-actions { margin-top: 10px; }
.action-btn { background: transparent; border: 1px solid var(--primary-color); color: var(--primary-color); padding: 8px 14px; border-radius: var(--border-radius); cursor: pointer; }

/* Fallback note */
.fallback-note { margin-top: 12px; font-size: 14px; color: #b45309; background: #fffbeb; border: 1px solid #fde68a; border-radius: 8px; padding: 10px; }

/* Results */
.results-section { background: var(--card-bg); border-radius: var(--border-radius); padding: 24px; box-shadow: var(--box-shadow); position: relative; }
.result-header { display: flex; flex-direction: column; align-items: center; gap: 8px; margin-bottom: 16px; border-bottom: 1px solid var(--border-color); padding-bottom: 12px; }
.result-header h2 { color: var(--dark-bg); font-size: 22px; }
.ip-focus { font-size: 36px; font-weight: 800; color: var(--dark-bg); background: #eef6ff; border: 1px solid #cfe5ff; padding: 10px 16px; border-radius: 12px; text-align: center; }
@media (max-width: 480px){ .ip-focus { font-size: 28px; } }

.result-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 20px; }
.result-group { background: #f8fafc; border: 1px solid var(--border-color); border-radius: var(--border-radius); padding: 16px; }
.result-group h3 { color: var(--secondary-color); font-size: 18px; margin-bottom: 10px; border-bottom: 1px solid #e9eef5; padding-bottom: 8px; }
.result-item { display: flex; flex-wrap: wrap; margin-bottom: 10px; }
.result-item .label { flex: 0 0 38%; font-weight: 600; color: #555; }
.result-item .value { flex: 1; word-break: break-word; }
.result-item .code { background: #e9eef5; padding: 0 6px; border-radius: 4px; font-size: 12px; margin-left: 6px; }
.flag-container { display: flex; align-items: center; }
.flag-container img { height: 20px; margin-right: 8px; border: 1px solid #eee; }

/* Map */
.map-container { margin-top: 20px; }
#map { height: 300px; border: 1px solid var(--border-color); border-radius: var(--border-radius); overflow: hidden; }

/* Loader */
.loader { display: flex; justify-content: center; align-items: center; min-height: 160px; }
.spinner { width: 40px; height: 40px; border: 4px solid rgba(52,152,219,.3); border-top-color: var(--primary-color); border-radius: 50%; animation: spin 1s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }

/* Error */
.error-container { text-align: center; padding: 24px; }
.error-icon { font-size: 40px; color: #e74c3c; margin-bottom: 8px; }
.error-text { color: #555; }

/* Utils */
.hidden { display: none !important; }

footer { margin-top: 20px; padding: 20px 0; text-align: center; color: #666; border-top: 1px solid var(--border-color); }
.icp { margin-top: 6px; font-size: 13px; color: #888; }

@media (max-width: 768px) {
  .result-grid { grid-template-columns: 1fr; }
  .result-item .label { flex: 0 0 42%; }
}