:root {
    --bg-page: #f5f7fa;
    --bg-panel: #ffffff;
    --primary: #1890ff;
    --primary-hover: #40a9ff;
    --secondary: #e6f7ff;

    --text-main: #333333;
    --text-second: #666666;
    --text-muted: #999999;
    --border-color: #e8e8e8;

    --radius-lg: 8px;
    --radius-md: 6px;
    --radius-sm: 4px;

    --shadow-panel: 0 2px 8px rgba(0, 0, 0, 0.08);
    --transition: all 0.2s ease-in-out;
}

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

body {
    font-family: 'Inter', 'Noto Sans SC', sans-serif;
    background-color: var(--bg-page);
    color: var(--text-main);
    line-height: 1.6;
    min-height: 100vh;
}

.site-wrapper {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

/* AdSense Placeholders */
.adsense-container {
    width: 100%;
    display: flex;
    justify-content: center;
    background-color: #f0f2f5;
    border: 1px dashed #d9d9d9;
    border-radius: var(--radius-sm);
    overflow: hidden;
}

.adsense-placeholder {
    color: var(--text-muted);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.875rem;
    width: 100%;
    background-color: rgba(0, 0, 0, 0.02);
}

.adsense-top .adsense-placeholder,
.adsense-bottom .adsense-placeholder {
    height: 90px;
    max-width: 728px;
}

.adsense-sidebar .adsense-placeholder {
    height: 250px;
    max-width: 300px;
    margin: 20px auto;
}

/* Header */
.app-header {
    text-align: center;
    padding: 10px 0 20px;
}

.app-header h1 {
    font-size: 2.2rem;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 8px;
}

.app-header p {
    color: var(--text-second);
    font-size: 1rem;
}

/* Panels */
.panel {
    background-color: var(--bg-panel);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-panel);
    padding: 24px;
    border: 1px solid var(--border-color);
}

/* Layout */
.calculator-layout {
    display: grid;
    grid-template-columns: 1fr 1.6fr;
    gap: 24px;
    align-items: start;
}

/* Tabs */
.tabs {
    display: flex;
    border-bottom: 2px solid #f0f0f0;
    margin-bottom: 24px;
}

.tab-btn {
    flex: 1;
    background: transparent;
    border: none;
    color: var(--text-second);
    padding: 12px 0;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    border-bottom: 2px solid transparent;
    margin-bottom: -2px;
}

.tab-btn:hover {
    color: var(--primary-hover);
}

.tab-btn.active {
    color: var(--primary);
    border-bottom-color: var(--primary);
    font-weight: 600;
}

/* Forms */
.form-content {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.input-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.input-group label {
    font-size: 0.95rem;
    color: var(--text-main);
    font-weight: 500;
}

.input-group input[type="number"],
.input-group select {
    background-color: #fff;
    border: 1px solid #d9d9d9;
    border-radius: var(--radius-sm);
    padding: 10px 14px;
    color: var(--text-main);
    font-size: 1rem;
    font-family: inherit;
    transition: var(--transition);
    outline: none;
}

.input-group input[type="number"]:focus,
.input-group select:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 2px rgba(24, 144, 255, 0.2);
}

.input-group select {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg width='12' height='8' viewBox='0 0 12 8' fill='none' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M1 1.5L6 6.5L11 1.5' stroke='%23666666' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 14px center;
    padding-right: 36px;
    cursor: pointer;
}

/* Radio Buttons */
.radio-group {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-top: 4px;
}

.radio-label {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    font-size: 0.95rem;
    color: var(--text-main);
}

.radio-label input[type="radio"] {
    display: none;
}

.custom-radio {
    width: 18px;
    height: 18px;
    border-radius: 50%;
    border: 1px solid #d9d9d9;
    display: inline-block;
    position: relative;
    transition: var(--transition);
    background-color: #fff;
}

.radio-label input[type="radio"]:checked+.custom-radio {
    border-color: var(--primary);
}

.radio-label input[type="radio"]:checked+.custom-radio::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 8px;
    height: 8px;
    background: var(--primary);
    border-radius: 50%;
}

/* Calculate Button */
.calculate-btn {
    background-color: var(--primary);
    color: #fff;
    border: none;
    border-radius: var(--radius-sm);
    padding: 14px;
    font-size: 1.1rem;
    font-weight: 500;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-top: 10px;
    transition: var(--transition);
    box-shadow: 0 2px 4px rgba(24, 144, 255, 0.2);
}

.calculate-btn:hover {
    background-color: var(--primary-hover);
}

.calculate-btn:active {
    transform: translateY(1px);
    box-shadow: none;
}

/* Results Section */
.results-summary h2 {
    font-size: 1.25rem;
    margin-bottom: 20px;
    font-weight: 600;
    color: var(--text-main);
    border-left: 4px solid var(--primary);
    padding-left: 10px;
    line-height: 1;
}

.result-cards {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
}

.result-card {
    background-color: #fafafa;
    border: 1px solid #f0f0f0;
    border-radius: var(--radius-sm);
    padding: 16px;
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.result-card.primary {
    grid-column: span 2;
    background-color: var(--secondary);
    border-color: #91d5ff;
}

.card-title {
    font-size: 0.9rem;
    color: var(--text-second);
}

.card-value {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--text-main);
    font-family: 'Inter', sans-serif;
}

.card-value.highlight {
    font-size: 2.2rem;
    color: var(--primary);
}

.card-desc {
    font-size: 0.85rem;
    color: var(--text-second);
}

/* Table */
.schedule-section {
    margin-top: 24px;
}

.schedule-section h3 {
    font-size: 1.1rem;
    margin-bottom: 16px;
    color: var(--text-main);
    font-weight: 600;
}

.table-container {
    max-height: 400px;
    overflow-y: auto;
    border-radius: var(--radius-sm);
    border: 1px solid #e8e8e8;
}

/* Custom Scrollbar for Table */
.table-container::-webkit-scrollbar {
    width: 6px;
}

.table-container::-webkit-scrollbar-track {
    background: #fafafa;
}

.table-container::-webkit-scrollbar-thumb {
    background: #c1c1c1;
    border-radius: 3px;
}

table {
    width: 100%;
    border-collapse: collapse;
    text-align: right;
    background-color: #fff;
}

th,
td {
    padding: 12px 16px;
    border-bottom: 1px solid #f0f0f0;
    font-size: 0.9rem;
    color: var(--text-main);
}

th {
    background-color: #fafafa;
    position: sticky;
    top: 0;
    font-weight: 500;
    color: var(--text-second);
    z-index: 1;
    border-bottom: 1px solid #e8e8e8;
}

th:first-child,
td:first-child {
    text-align: center;
}

tr:hover {
    background-color: #fafafa;
}

.empty-state td {
    text-align: center;
    padding: 30px;
    color: var(--text-muted);
}

/* Footer */
.app-footer {
    text-align: center;
    margin-top: 20px;
    color: var(--text-muted);
    font-size: 0.9rem;
}

/* Responsive */
@media (max-width: 900px) {
    .calculator-layout {
        grid-template-columns: 1fr;
    }

    .app-header h1 {
        font-size: 1.8rem;
    }
}

@media (max-width: 600px) {
    .site-wrapper {
        padding: 10px;
    }

    .panel {
        padding: 16px;
    }

    .result-cards {
        grid-template-columns: 1fr;
    }

    .result-card.primary {
        grid-column: 1;
    }

    .card-value.highlight {
        font-size: 1.8rem;
    }
}