/* 简约高级白色主题 - QS大学排名选择器 */

/* 全局重置和基础样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #2c3e50;
    --secondary-color: #3498db;
    --accent-color: #1abc9c;
    --text-primary: #2c3e50;
    --text-secondary: #7f8c8d;
    --bg-primary: #ffffff;
    --bg-secondary: #f8f9fa;
    --border-color: #e1e8ed;
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.12);
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
    background: #fafbfc;
    color: var(--text-primary);
    line-height: 1.6;
    padding: 40px 20px;
    min-height: 100vh;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    background: var(--bg-primary);
    border-radius: 12px;
    box-shadow: var(--shadow-md);
    overflow: hidden;
}

/* 页头设计 */
.header {
    background: var(--bg-primary);
    padding: 48px 40px;
    text-align: center;
    border-bottom: 1px solid var(--border-color);
}

.header h1 {
    font-size: 2em;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 12px;
    letter-spacing: -0.02em;
}

.header h1 i {
    color: var(--secondary-color);
    margin-right: 12px;
}

.subtitle {
    font-size: 1em;
    color: var(--text-secondary);
    font-weight: 400;
}

/* 功能卡片 */
.function-card {
    margin: 32px 40px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    overflow: hidden;
    transition: all 0.3s ease;
    background: var(--bg-primary);
}

.function-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.card-header {
    background: var(--bg-secondary);
    padding: 20px 24px;
    border-bottom: 1px solid var(--border-color);
}

.card-header h2 {
    font-size: 1.25em;
    font-weight: 600;
    color: var(--text-primary);
    display: flex;
    align-items: center;
}

.card-header h2 i {
    color: var(--secondary-color);
    margin-right: 10px;
    font-size: 0.95em;
}

.card-body {
    padding: 28px 24px;
}

/* 表单元素 */
.form-group {
    margin-bottom: 24px;
}

.form-group label {
    display: block;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: 8px;
    font-size: 0.95em;
}

.form-group label i {
    color: var(--secondary-color);
    margin-right: 6px;
    font-size: 0.9em;
}

.form-control {
    width: 100%;
    padding: 12px 16px;
    border: 1.5px solid var(--border-color);
    border-radius: 6px;
    font-size: 0.95em;
    transition: all 0.2s ease;
    font-family: 'Inter', sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
}

.form-control:hover {
    border-color: #bdc3c7;
}

.form-control:focus {
    outline: none;
    border-color: var(--secondary-color);
    box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.1);
}

/* 按钮设计 */
.btn {
    padding: 12px 28px;
    border: none;
    border-radius: 6px;
    font-size: 0.95em;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
    font-family: 'Inter', sans-serif;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.btn-primary {
    background: var(--text-primary);
    color: white;
}

.btn-primary:hover {
    background: #1a252f;
    transform: translateY(-1px);
    box-shadow: var(--shadow-sm);
}

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

.btn i {
    margin-right: 8px;
    font-size: 0.9em;
}

/* 复制按钮 */
.copy-btn {
    padding: 6px 12px;
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    font-size: 0.85em;
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.2s ease;
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

.copy-btn:hover {
    background: var(--bg-secondary);
    border-color: var(--secondary-color);
    color: var(--secondary-color);
}

.copy-btn.copied {
    background: #d4edda;
    border-color: #28a745;
    color: #28a745;
}

.copy-btn i {
    font-size: 0.9em;
}

/* 结果区域 */
.result-area {
    margin-top: 24px;
    padding: 24px;
    background: var(--bg-secondary);
    border-radius: 8px;
    border: 1px solid var(--border-color);
    display: none;
}

.result-area.show {
    display: block;
    animation: fadeIn 0.4s ease;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.result-title {
    font-size: 1.1em;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 20px;
    display: flex;
    align-items: center;
}

.result-title i {
    color: var(--accent-color);
    margin-right: 8px;
}

/* 大学项目卡片 */
.university-item {
    background: var(--bg-primary);
    padding: 18px 20px;
    margin-bottom: 12px;
    border-radius: 6px;
    border: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    transition: all 0.2s ease;
}

.university-item:hover {
    box-shadow: var(--shadow-sm);
    border-color: #bdc3c7;
}

.university-item:last-child {
    margin-bottom: 0;
}

.university-main {
    display: flex;
    align-items: center;
    flex: 1;
}

.university-number {
    background: var(--text-primary);
    color: white;
    width: 32px;
    height: 32px;
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 0.9em;
    margin-right: 16px;
    flex-shrink: 0;
}

.university-info {
    flex: 1;
    min-width: 0;
}

.university-name {
    font-size: 1em;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: 6px;
    line-height: 1.4;
}

.university-details {
    font-size: 0.875em;
    color: var(--text-secondary);
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
}

.university-details .rank {
    display: inline-flex;
    align-items: center;
    gap: 4px;
}

.university-details .rank i {
    color: var(--secondary-color);
    font-size: 0.9em;
}

.university-details .country {
    display: inline-flex;
    align-items: center;
    gap: 4px;
}

.university-details .country i {
    color: var(--accent-color);
    font-size: 0.9em;
}

/* 固定大学标识 */
.university-item.fixed {
    border-left: 3px solid var(--accent-color);
}

.university-item.fixed .university-number {
    background: var(--accent-color);
}

.fixed-badge {
    background: var(--accent-color);
    color: white;
    padding: 2px 8px;
    border-radius: 3px;
    font-size: 0.75em;
    font-weight: 500;
    margin-left: 8px;
}

/* 大学选项卡片 */
.university-cards {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 12px;
    margin-top: 12px;
}

.uni-card {
    background: var(--bg-primary);
    border: 2px solid var(--border-color);
    border-radius: 8px;
    padding: 16px 18px;
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    gap: 12px;
    position: relative;
}

.uni-card:hover {
    border-color: var(--secondary-color);
    background: var(--bg-secondary);
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
}

.uni-card .card-check {
    font-size: 1.2em;
    color: var(--border-color);
    transition: all 0.2s ease;
    flex-shrink: 0;
}

.uni-card .card-name {
    flex: 1;
    font-size: 0.95em;
    font-weight: 500;
    color: var(--text-primary);
}

/* 选中状态 */
.uni-card.selected {
    background: linear-gradient(135deg, rgba(52, 152, 219, 0.1) 0%, rgba(26, 188, 156, 0.1) 100%);
    border-color: var(--secondary-color);
    border-width: 2px;
}

.uni-card.selected .card-check {
    color: var(--accent-color);
    transform: scale(1.1);
}

.uni-card.selected .card-name {
    color: var(--secondary-color);
    font-weight: 600;
}

.uni-card:active {
    transform: translateY(0);
}

.selected-count {
    margin-top: 16px;
    padding: 12px;
    background: var(--bg-secondary);
    border-radius: 6px;
    text-align: center;
    font-weight: 500;
    color: var(--text-primary);
    font-size: 0.95em;
    border: 1px solid var(--border-color);
}

.selected-count span {
    color: var(--secondary-color);
    font-weight: 600;
    font-size: 1.15em;
}

/* 页脚 */
.footer {
    background: var(--bg-secondary);
    text-align: center;
    padding: 28px;
    color: var(--text-secondary);
    font-size: 0.875em;
    border-top: 1px solid var(--border-color);
}

/* 空状态 */
.empty-state {
    text-align: center;
    padding: 48px 20px;
    color: var(--text-secondary);
}

.empty-state i {
    font-size: 3em;
    margin-bottom: 16px;
    color: #ddd;
}

.empty-state p {
    font-size: 1em;
}

/* 错误提示 */
.error-message {
    background: #fff5f5;
    color: #e74c3c;
    padding: 16px 20px;
    border-radius: 6px;
    border-left: 3px solid #e74c3c;
    display: flex;
    align-items: center;
}

.error-message i {
    margin-right: 10px;
    font-size: 1.1em;
}

/* 响应式设计 */
@media (max-width: 768px) {
    body {
        padding: 20px 10px;
    }

    .container {
        border-radius: 8px;
    }

    .header {
        padding: 32px 24px;
    }

    .header h1 {
        font-size: 1.5em;
    }

    .subtitle {
        font-size: 0.9em;
    }

    .function-card {
        margin: 20px 16px;
    }

    .card-header {
        padding: 16px 20px;
    }

    .card-header h2 {
        font-size: 1.1em;
    }

    .card-body {
        padding: 20px 16px;
    }

    .university-item {
        flex-direction: column;
        align-items: flex-start;
        padding: 16px;
    }

    .university-main {
        width: 100%;
        margin-bottom: 12px;
    }

    .copy-btn {
        width: 100%;
        justify-content: center;
    }

    .university-details {
        flex-direction: column;
        gap: 8px;
    }
    
    /* 移动端卡片布局 */
    .university-cards {
        grid-template-columns: 1fr;
    }
    
    .uni-card {
        padding: 14px 16px;
    }
}

/* 打印样式 */
@media print {
    body {
        background: white;
        padding: 0;
    }

    .container {
        box-shadow: none;
    }

    .btn, .copy-btn, .search-box, .footer {
        display: none;
    }

    .function-card {
        page-break-inside: avoid;
    }
}