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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    color: #333;
    line-height: 1.6;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

/* Header Styles */
header {
    text-align: center;
    margin-bottom: 40px;
    padding: 40px 0;
}

.header-content {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border-radius: 20px;
    padding: 40px;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.bitcoin-icon {
    font-size: 4rem;
    color: #f7931a;
    margin-bottom: 20px;
    text-shadow: 0 4px 8px rgba(0, 0, 0, 0.3);
}

header h1 {
    font-size: 2.5rem;
    font-weight: 700;
    color: white;
    margin-bottom: 10px;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

header p {
    font-size: 1.1rem;
    color: rgba(255, 255, 255, 0.9);
    font-weight: 300;
}

/* Calculator Card */
.calculator-card {
    background: white;
    border-radius: 24px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
    overflow: hidden;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0;
    margin-bottom: 40px;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.calculator-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 30px 60px rgba(0, 0, 0, 0.15);
}

.input-section, .results-section {
    padding: 40px;
}

.input-section {
    background: #f8fafc;
    border-right: 1px solid #e2e8f0;
}

.input-section h2, .results-section h2 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 30px;
    color: #1e293b;
}

/* Input Styles */
.input-group {
    margin-bottom: 25px;
}

.input-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: #374151;
    font-size: 0.95rem;
}

.input-wrapper {
    position: relative;
    display: flex;
    align-items: center;
}

.input-wrapper input {
    width: 100%;
    padding: 16px 20px;
    border: 2px solid #e5e7eb;
    border-radius: 12px;
    font-size: 1rem;
    transition: all 0.3s ease;
    background: white;
}

.input-wrapper input:focus {
    outline: none;
    border-color: #667eea;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.currency-symbol, .percentage-symbol {
    position: absolute;
    color: #6b7280;
    font-weight: 500;
    pointer-events: none;
}

.currency-symbol {
    left: 16px;
}

.percentage-symbol {
    right: 16px;
}

.input-wrapper input[type="number"] {
    padding-left: 45px;
}

.input-wrapper input[type="number"]:last-child {
    padding-right: 45px;
}

/* Calculate Button */
.calculate-btn {
    width: 100%;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    padding: 18px 24px;
    border-radius: 12px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    margin-top: 30px;
}

.calculate-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(102, 126, 234, 0.3);
}

.calculate-btn:active {
    transform: translateY(0);
}

.btn-icon {
    font-size: 1.2rem;
    transition: transform 0.3s ease;
}

.calculate-btn:hover .btn-icon {
    transform: translateX(5px);
}

/* Results Section */
.results-section {
    background: white;
}

.result-card {
    background: #f8fafc;
    border: 1px solid #e2e8f0;
    border-radius: 12px;
    padding: 20px;
    margin-bottom: 16px;
    transition: all 0.3s ease;
}

.result-card:hover {
    background: #f1f5f9;
    border-color: #cbd5e1;
}

.result-label {
    font-size: 0.9rem;
    color: #64748b;
    font-weight: 500;
    margin-bottom: 8px;
}

.result-value {
    font-size: 1.4rem;
    font-weight: 700;
    color: #1e293b;
}

.risk-amount {
    color: #dc2626;
}

/* Info Section */
.info-section {
    background: white;
    border-radius: 20px;
    padding: 40px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    margin-bottom: 40px;
}

.info-section h3 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 30px;
    text-align: center;
    color: #1e293b;
}

.info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.info-item {
    display: flex;
    align-items: flex-start;
    gap: 20px;
}

.info-number {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    flex-shrink: 0;
}

.info-content h4 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 8px;
    color: #1e293b;
}

.info-content p {
    color: #64748b;
    font-size: 0.95rem;
}

/* Footer */
footer {
    text-align: center;
    padding: 30px;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border-radius: 16px;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

footer p {
    color: rgba(255, 255, 255, 0.9);
    font-size: 0.9rem;
}

/* Responsive Design */
@media (max-width: 768px) {
    .container {
        padding: 15px;
    }
    
    .calculator-card {
        grid-template-columns: 1fr;
    }
    
    .input-section {
        border-right: none;
        border-bottom: 1px solid #e2e8f0;
    }
    
    .input-section, .results-section {
        padding: 30px 25px;
    }
    
    header h1 {
        font-size: 2rem;
    }
    
    .bitcoin-icon {
        font-size: 3rem;
    }
    
    .header-content {
        padding: 30px 20px;
    }
    
    .info-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .info-section {
        padding: 30px 25px;
    }
}

@media (max-width: 480px) {
    .input-section, .results-section {
        padding: 25px 20px;
    }
    
    .header-content {
        padding: 25px 15px;
    }
    
    header h1 {
        font-size: 1.8rem;
    }
    
    .result-value {
        font-size: 1.2rem;
    }
}

/* Animation for results update */
.result-value.updating {
    animation: pulse 0.5s ease-in-out;
}

@keyframes pulse {
    0% { transform: scale(1); }
    50% { transform: scale(1.05); }
    100% { transform: scale(1); }
}