:root {
    --primary-color: #667eea;
    --secondary-color: #764ba2;
    --success-color: #4caf50;
    --dark-color: #333;
    --light-color: #f5f5f5;
    --border-radius: 12px;
    --transition: all 0.3s ease;
    --background-gradient: linear-gradient(135deg, #f5f7fa 0%, #e4e8ec 100%);
    --card-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
}

.renminbi-section {
    padding: 20px 0;
    min-height: 100vh;
    background: var(--background-gradient);
}

.container {
    max-width: 800px;
    margin: 0 auto;
    padding: 0 15px;
}

.calculator-header {
    text-align: center;
    margin-bottom: 30px;
    padding: 40px 20px;
    background: white;
    border-radius: var(--border-radius);
    box-shadow: var(--card-shadow);
}

.header-content {
    max-width: 600px;
    margin: 0 auto;
}

.calculator-title {
    font-size: 2.5rem;
    color: var(--dark-color);
    margin-bottom: 15px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 15px;
}

.calculator-title i {
    color: #e74c3c;
}

.calculator-subtitle {
    font-size: 1.1rem;
    color: #666;
    margin-bottom: 20px;
}

.calculator-badge {
    display: flex;
    justify-content: center;
    gap: 10px;
    flex-wrap: wrap;
}

.badge-item {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    padding: 5px 15px;
    border-radius: 20px;
    font-size: 0.85rem;
}

.converter-main {
    background: white;
    border-radius: var(--border-radius);
    box-shadow: var(--card-shadow);
    padding: 30px;
}

.input-section {
    margin-bottom: 30px;
}

.input-section label {
    display: block;
    margin-bottom: 12px;
    font-weight: 600;
    color: var(--dark-color);
    display: flex;
    align-items: center;
    gap: 8px;
}

.input-section label i {
    color: var(--primary-color);
}

.input-wrapper {
    display: flex;
    align-items: center;
    border: 2px solid #e0e0e0;
    border-radius: 10px;
    padding: 0 15px;
    transition: var(--transition);
}

.input-wrapper:focus-within {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.currency-symbol {
    font-size: 1.5rem;
    color: #e74c3c;
    margin-right: 10px;
}

.form-control {
    flex: 1;
    padding: 15px;
    border: none;
    font-size: 1.2rem;
    outline: none;
}

.quick-amounts {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 15px;
}

.quick-btn {
    padding: 8px 16px;
    background: #f5f5f5;
    border: 1px solid #ddd;
    border-radius: 8px;
    cursor: pointer;
    transition: var(--transition);
    font-size: 0.9rem;
}

.quick-btn:hover {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

.output-section {
    margin-bottom: 30px;
}

.output-section label {
    display: block;
    margin-bottom: 12px;
    font-weight: 600;
    color: var(--dark-color);
    display: flex;
    align-items: center;
    gap: 8px;
}

.output-section label i {
    color: var(--success-color);
}

.result-box {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px;
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    border-radius: 10px;
    border: 2px solid #dee2e6;
    min-height: 60px;
}

#result-text {
    font-size: 1.1rem;
    color: var(--dark-color);
    font-weight: 500;
    flex: 1;
}

.copy-btn {
    padding: 10px 15px;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: var(--transition);
    margin-left: 15px;
}

.copy-btn:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.3);
}

.copy-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.output-formats {
    margin-top: 15px;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.format-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 15px;
    background: #f8f9fa;
    border-radius: 8px;
}

.format-label {
    font-weight: 500;
    color: #666;
    min-width: 80px;
}

.section-title {
    font-size: 1.2rem;
    color: var(--dark-color);
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.section-title i {
    color: #ffc107;
}

.examples-grid {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.example-item {
    display: flex;
    align-items: center;
    gap: 15px;
    padding: 15px;
    background: #f8f9fa;
    border-radius: 8px;
}

.example-input {
    font-family: monospace;
    font-size: 1rem;
    color: #666;
    min-width: 120px;
}

.example-arrow {
    color: var(--primary-color);
    font-weight: bold;
}

.example-output {
    font-size: 0.95rem;
    color: var(--dark-color);
}

@media (max-width: 768px) {
    .calculator-title {
        font-size: 1.8rem;
    }

    .calculator-header {
        padding: 25px 15px;
    }

    .converter-main {
        padding: 20px 15px;
    }

    .example-item {
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
    }

    .result-box {
        flex-direction: column;
        gap: 15px;
    }

    .copy-btn {
        margin-left: 0;
        width: 100%;
        justify-content: center;
        display: flex;
    }
}