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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f3460 100%);
    min-height: 100vh;
    color: #e0e0e0;
    padding: 15px;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
}

header {
    text-align: center;
    margin-bottom: 30px;
    padding: 25px 20px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 16px;
    backdrop-filter: blur(10px);
}

header h1 {
    font-size: 2rem;
    background: linear-gradient(90deg, #00d4ff, #00ff88);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 5px;
}

.subtitle {
    color: #888;
    font-size: 1rem;
}

.main-content {
    display: grid;
    grid-template-columns: 320px 1fr;
    gap: 20px;
}

.card {
    background: rgba(255, 255, 255, 0.08);
    border-radius: 16px;
    padding: 20px;
    margin-bottom: 20px;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.card h2 {
    font-size: 1.2rem;
    margin-bottom: 15px;
    color: #00d4ff;
    border-bottom: 2px solid rgba(0, 212, 255, 0.3);
    padding-bottom: 8px;
}

.card h3 {
    font-size: 1rem;
    margin: 15px 0 10px;
    color: #00ff88;
}

.input-group {
    margin-bottom: 18px;
}

.input-group label {
    display: block;
    margin-bottom: 8px;
    color: #aaa;
    font-size: 0.9rem;
}

.input-group input,
.input-group select {
    width: 100%;
    padding: 12px 14px;
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 10px;
    background: rgba(0, 0, 0, 0.3);
    color: #fff;
    font-size: 1rem;
    transition: all 0.3s ease;
    -webkit-appearance: none;
    appearance: none;
}

.input-group select {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='%23aaa' viewBox='0 0 16 16'%3E%3Cpath d='M8 11L3 6h10l-5 5z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 14px center;
    padding-right: 40px;
}

.input-group input:focus,
.input-group select:focus {
    outline: none;
    border-color: #00d4ff;
    box-shadow: 0 0 15px rgba(0, 212, 255, 0.3);
}

.btn-primary,
.btn-add {
    width: 100%;
    padding: 14px;
    background: linear-gradient(135deg, #00d4ff, #0099cc);
    border: none;
    border-radius: 10px;
    color: #000;
    font-size: 1rem;
    font-weight: bold;
    cursor: pointer;
    transition: all 0.3s ease;
    margin-top: 10px;
}

.btn-add {
    background: linear-gradient(135deg, #00ff88, #00cc6a);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0, 212, 255, 0.4);
}

.btn-secondary {
    width: 100%;
    padding: 10px;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 10px;
    color: #fff;
    font-size: 0.9rem;
    cursor: pointer;
    transition: all 0.3s ease;
    margin-top: 5px;
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.2);
}

.btn-primary:hover,
.btn-add:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0, 212, 255, 0.4);
}

.btn-add:hover {
    box-shadow: 0 8px 25px rgba(0, 255, 136, 0.4);
}

.hidden {
    display: none;
}

.results-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 12px;
}

.result-item {
    background: rgba(0, 0, 0, 0.3);
    border-radius: 12px;
    padding: 15px;
    text-align: center;
    border: 2px solid rgba(255, 255, 255, 0.1);
    transition: all 0.3s ease;
}

.result-item:hover {
    transform: translateY(-3px);
    border-color: rgba(0, 212, 255, 0.5);
}

.result-item.cold {
    border-color: rgba(0, 180, 255, 0.4);
}

.result-item.city {
    border-color: rgba(0, 255, 136, 0.4);
}

.result-item.highway {
    border-color: rgba(255, 180, 0, 0.4);
}

.result-item.regen-high {
    border-color: rgba(136, 0, 255, 0.4);
}

.result-item.regen-low {
    border-color: rgba(255, 100, 100, 0.4);
}

.result-label {
    font-size: 0.85rem;
    color: #888;
    margin-bottom: 8px;
}

.result-value {
    font-size: 1.4rem;
    font-weight: bold;
    color: #fff;
    margin-bottom: 5px;
}

.result-sub {
    font-size: 0.8rem;
    color: #666;
}

.charging-info {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.info-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 14px;
    background: rgba(0, 0, 0, 0.3);
    border-radius: 10px;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.info-label {
    color: #aaa;
    font-size: 0.9rem;
}

.info-value {
    color: #00ff88;
    font-size: 1rem;
    font-weight: bold;
}

.chart-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
}

.chart-header h2 {
    border: none;
    margin: 0;
    padding: 0;
}

.btn-small {
    padding: 8px 16px;
    background: rgba(255, 100, 100, 0.2);
    border: 1px solid rgba(255, 100, 100, 0.4);
    border-radius: 8px;
    color: #ff6464;
    font-size: 0.85rem;
    cursor: pointer;
    transition: all 0.3s ease;
}

.btn-small:hover {
    background: rgba(255, 100, 100, 0.3);
}

#rangeChart,
#speedChart {
    max-height: 350px;
}

.info-row.highlight {
    background: rgba(0, 212, 255, 0.15);
    border: 1px solid rgba(0, 212, 255, 0.3);
}

.info-row.highlight .info-value {
    color: #00d4ff;
    font-size: 1.1rem;
}

@media (max-width: 1024px) {
    .main-content {
        grid-template-columns: 1fr;
    }
    
    .card {
        margin-bottom: 20px;
    }
}

@media (max-width: 768px) {
    body {
        padding: 12px;
    }
    
    header {
        padding: 20px 15px;
        margin-bottom: 20px;
    }
    
    header h1 {
        font-size: 1.6rem;
    }
    
    .subtitle {
        font-size: 0.9rem;
    }
    
    .card {
        padding: 16px;
    }
    
    .card h2 {
        font-size: 1.1rem;
    }
    
    .results-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 10px;
    }
    
    .result-item {
        padding: 12px;
    }
    
    .result-value {
        font-size: 1.2rem;
    }
    
    .info-row {
        padding: 10px 12px;
        flex-wrap: wrap;
        gap: 8px;
    }
    
    .info-label {
        flex: 1;
        font-size: 0.85rem;
    }
    
    .chart-header {
        flex-wrap: wrap;
        gap: 10px;
    }
    
    #rangeChart,
    #speedChart {
        max-height: 300px;
    }
}

@media (max-width: 480px) {
    header h1 {
        font-size: 1.4rem;
    }
    
    .results-grid {
        grid-template-columns: 1fr 1fr;
        gap: 8px;
    }
    
    .result-item {
        padding: 10px;
    }
    
    .result-value {
        font-size: 1.1rem;
    }
    
    .info-label {
        font-size: 0.8rem;
    }
    
    .info-value {
        font-size: 0.95rem;
    }
    
    .btn-primary,
    .btn-add {
        padding: 12px;
        font-size: 0.95rem;
    }
}