*{margin: 0;padding: 0;box-sizing: border-box}
body{font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;background-color:#f7f9fc;color:#1f2937;}
.container{background-color:#fff;border-radius: 12px;box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);max-width: 700px;width: 100%;overflow: hidden}
.header{background-color:#2bb673;color:#fff;padding: 30px;text-align: center}
.header h1{font-size: 28px;margin-bottom: 10px}
.header p{font-size: 14px;opacity: 0.9}
.tabs{display: flex;border-bottom: 2px solid #f0f0f0;overflow-x: auto}
.tab-button{flex: 1;padding: 15px;border: none;background:#fff;cursor: pointer;font-size: 13px;font-weight: 500;color: #666;transition: all 0.3s ease;border-bottom: 3px solid transparent;white-space: nowrap;min-width: 140px}
.tab-button:hover{background: #f9f9f9}
.tab-button.active{color: #667eea;border-bottom-color: #667eea}
.tab-content{display: none;padding: 30px;max-height: 800px;overflow-y: auto}
.tab-content.active{display: block;animation: fadeIn 0.3s ease}
@keyframes fadeIn{from { opacity: 0; }
    to { opacity: 1; }
}
.form-group{margin-bottom: 20px}
.form-group label{display: block;margin-bottom: 8px;color: #333;font-weight: 500;font-size: 14px}
.input-wrapper{display: flex;align-items: center;position: relative}
.form-group input{flex: 1;padding: 12px;border: 2px solid #e0e0e0;border-radius: 6px;font-size: 14px;transition: border-color 0.3s ease}
.form-group input:focus{outline: none;border-color: #667eea}
.unit{margin-left: 10px;color: #999;font-size: 14px;min-width: 80px}
#routeMap{width: 100%;height: 400px;border-radius: 6px;margin-bottom: 20px;border: 2px solid #e0e0e0;z-index: 1}
.route-info{background: #e8f0fe;border: 1px solid #667eea;border-radius: 6px;padding: 12px;margin-bottom: 15px;font-size: 13px}
.route-info strong{color: #667eea}
.route-controls{display: flex;gap: 10px;margin-bottom: 15px;flex-wrap: wrap}
.route-btn{padding: 8px 15px;background: #667eea;color:#fff;border: none;border-radius: 4px;cursor: pointer;font-size: 12px;font-weight: 500;transition: background 0.2s ease}
.route-btn:hover{background: #764ba2}
.route-btn.secondary{background: #999}
.route-btn.secondary:hover{background: #666}
.calculate-button{width: 100%;padding: 14px;background-color:#1e5aa8;color:#fff;border: none;border-radius: 6px;font-size: 16px;font-weight: 600;cursor: pointer;transition: transform 0.2s ease, box-shadow 0.2s ease}
.calculate-button:hover{transform: translateY(-2px);box-shadow: 0 10px 20px rgba(102, 126, 234, 0.4)}
.calculate-button:active{transform: translateY(0)}
.results{background: #f9f9f9;border-radius: 8px;padding: 20px;margin-top: 25px;display: none}
.results.show{display: block;animation: slideDown 0.3s ease}
@keyframes slideDown{from{    opacity: 0;    transform: translateY(-10px);}
    to{    opacity: 1;    transform: translateY(0);}
}
.result-item{margin-bottom: 15px;padding-bottom: 15px;border-bottom: 1px solid #e0e0e0}
.result-item:last-child{margin-bottom: 0;padding-bottom: 0;border-bottom: none}
.result-label{color: #666;font-size: 13px;margin-bottom: 5px}
.result-value{font-size: 24px;font-weight: 700;color: #667eea}
.result-value span{font-size: 14px;color: #999;margin-left: 5px}
.formula{background:#fff;border-left: 4px solid #667eea;padding: 15px;margin-top: 15px;border-radius: 4px;font-size: 13px;color: #555;font-family: 'Courier New', monospace;line-height: 1.6;word-break: break-word}
.formula-title{font-weight: 600;color: #333;margin-bottom: 8px}
.formula-text{word-break: break-word}
.share-code{background: #e8f0fe;border: 1px solid #667eea;border-radius: 6px;padding: 12px;margin-top: 15px;display: flex;flex-direction: column;gap: 10px}
.code-display{font-weight: 600;color: #667eea;font-size: 11px;word-break: break-all;background:#fff;padding: 8px;border-radius: 4px;max-height: 80px;overflow-y: auto}
.share-buttons{display: flex;gap: 10px;flex-wrap: wrap}
.copy-button{flex: 1;min-width: 150px;background: #667eea;color:#fff;border: none;padding: 10px 15px;border-radius: 4px;cursor: pointer;font-size: 13px;font-weight: 500;white-space: nowrap;transition: background 0.2s ease}
.copy-button:hover{background: #764ba2}
.copy-button.copied{background: #4caf50}
.loader{display: none;text-align: center;margin: 20px 0}
.spinner{border: 3px solid #f3f3f3;border-top: 3px solid #667eea;border-radius: 50%;width: 30px;height: 30px;animation: spin 1s linear infinite;margin: 0 auto}
@keyframes spin{0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}
.loader.show{display: block}
.error{background: #ffebee;color: #c62828;padding: 12px;border-radius: 6px;margin-top: 15px;display: none;font-size: 14px}
.error.show{display: block}
@media (max-width: 600px){
	.header h1{    font-size: 22px;}
    .tabs{    flex-direction: column;}
    .tab-button{    text-align: left;    border-bottom: none;    border-right: 3px solid transparent;    min-width: auto;}
    .tab-button.active{    border-right-color: #667eea;    border-bottom: none;}
    .share-buttons{    flex-direction: column;}
    .copy-button{    min-width: auto;}
    #routeMap{    height: 300px;}
    .route-controls{    flex-direction: column;}
    .route-btn{    width: 100%;}
}