/* 基础样式 */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
    background-color: #f9fafb;
    color: #111827;
    line-height: 1.5;
}

.container {
    min-height: 100vh;
    padding: 2rem 1rem;
    max-width: 64rem;
    margin: 0 auto;
}

.header {
    text-align: center;
    margin-bottom: 2rem;
}

.title {
    font-size: 1.875rem;
    font-weight: 700;
    color: #111827;
    display: flex;
    align-items: center;
    justify-content: center;
}

.title .icon {
    margin-right: 0.5rem;
}

.subtitle {
    margin-top: 0.5rem;
    font-size: 0.875rem;
    color: #6b7280;
}

/* 卡片样式 */
.calculator-card, .result-card {
    background-color: white;
    border-radius: 0.5rem;
    box-shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
    padding: 1.5rem;
    margin-bottom: 2rem;
}

/* 表单样式 */
.form-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.5rem;
}

@media (min-width: 768px) {
    .form-grid {
        grid-template-columns: 1fr 1fr;
    }
}

.form-group {
    margin-bottom: 0.5rem;
}

.form-label {
    display: flex;
    align-items: center;
    font-size: 0.875rem;
    font-weight: 500;
    color: #374151;
    margin-bottom: 0.25rem;
}

.form-label .icon {
    margin-right: 0.5rem;
}

.input-wrapper, .select-wrapper {
    position: relative;
}

.form-input, .form-select {
    display: block;
    width: 100%;
    padding: 0.5rem 0.75rem;
    border: 1px solid #d1d5db;
    border-radius: 0.375rem;
    font-size: 1rem;
    line-height: 1.5;
    color: #111827;
    background-color: white;
    transition: border-color 0.15s ease-in-out, box-shadow 0.15s ease-in-out;
}

.form-input:focus, .form-select:focus {
    outline: none;
    border-color: #3b82f6;
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.25);
}

.form-input {
    padding-right: 3rem;
}

.input-suffix {
    position: absolute;
    right: 0.75rem;
    top: 50%;
    transform: translateY(-50%);
    color: #6b7280;
    font-size: 0.875rem;
    pointer-events: none;
}

.select-wrapper {
    position: relative;
}

.select-icon {
    position: absolute;
    right: 0.75rem;
    top: 50%;
    transform: translateY(-50%);
    color: #6b7280;
    pointer-events: none;
}

/* 按钮样式 */
.button-container {
    margin-top: 1.5rem;
}

.calculate-button {
    display: flex;
    width: 100%;
    justify-content: center;
    padding: 0.75rem 1rem;
    border: none;
    border-radius: 0.375rem;
    background-color: #2563eb;
    color: white;
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: background-color 0.15s ease-in-out, transform 0.1s ease-in-out;
}

.calculate-button:hover {
    background-color: #1d4ed8;
    transform: scale(1.02);
}

.calculate-button:active {
    transform: scale(0.98);
}

/* 结果卡片样式 */
.result-card {
    opacity: 1;
    transform: translateY(0);
    transition: opacity 0.3s ease, transform 0.3s ease;
}

.result-card.hidden {
    display: none;
    opacity: 0;
    transform: translateY(20px);
}

.result-title {
    font-size: 1.125rem;
    font-weight: 500;
    color: #111827;
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
}

.result-title .icon {
    margin-right: 0.5rem;
}

.result-summary {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

@media (min-width: 768px) {
    .result-summary {
        grid-template-columns: 1fr 1fr;
    }
}

@media (min-width: 1024px) {
    .result-summary {
        grid-template-columns: 1fr 1fr 1fr 1fr;
    }
}

.result-item {
    padding: 1rem;
    border-radius: 0.5rem;
}

.result-item.blue {
    background-color: #eff6ff;
}

.result-item.purple {
    background-color: #f5f3ff;
}

.result-item.green {
    background-color: #ecfdf5;
}

.result-item.orange {
    background-color: #fff7ed;
}

.result-label {
    font-size: 0.875rem;
}

.result-item.blue .result-label {
    color: #1e40af;
}

.result-item.purple .result-label {
    color: #5b21b6;
}

.result-item.green .result-label {
    color: #065f46;
}

.result-item.orange .result-label {
    color: #9a3412;
}

.result-value {
    font-size: 1.5rem;
    font-weight: 700;
    margin-top: 0.25rem;
}

.result-item.blue .result-value {
    color: #2563eb;
}

.result-item.purple .result-value {
    color: #7c3aed;
}

.result-item.green .result-value {
    color: #059669;
}

.result-item.orange .result-value {
    color: #ea580c;
}

/* 表格样式 */
.table-container {
    overflow-x: auto;
}

.result-table {
    min-width: 100%;
    border-collapse: separate;
    border-spacing: 0;
}

.result-table th {
    padding: 0.75rem 1.5rem;
    text-align: left;
    font-size: 0.75rem;
    font-weight: 500;
    text-transform: uppercase;
    color: #6b7280;
    background-color: #f9fafb;
    border-bottom: 1px solid #e5e7eb;
}

.result-table td {
    padding: 1rem 1.5rem;
    font-size: 0.875rem;
    color: #6b7280;
    border-bottom: 1px solid #e5e7eb;
    white-space: nowrap;
}

/* 页脚样式 */
.footer {
    text-align: center;
    font-size: 0.875rem;
    color: #6b7280;
    padding: 1rem 0;
    border-top: 1px solid #e5e7eb;
}

.footer-link {
    color: #2563eb;
    text-decoration: none;
}

.footer-link:hover {
    color: #1d4ed8;
    text-decoration: underline;
}