/* ========================================
   综合素质研究性学习证书查询系统
   响应式样式表 - 移动端优先
   ======================================== */

/* --- 基础重置 --- */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

:root {
    --primary: #1a5276;
    --primary-light: #2980b9;
    --primary-dark: #0d3b5e;
    --accent: #c0392b;
    --bg: #f5f6fa;
    --bg-white: #ffffff;
    --text: #2c3e50;
    --text-light: #666;
    --text-lighter: #999;
    --border: #ddd;
    --border-light: #eee;
    --success: #27ae60;
    --danger: #e74c3c;
    --warning: #f39c12;
    --shadow: 0 2px 8px rgba(0,0,0,0.08);
    --radius: 8px;
    --max-width: 900px;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", "Helvetica Neue", sans-serif;
    color: var(--text);
    background: var(--bg);
    line-height: 1.7;
    min-height: 100vh;
    font-size: 15px;
}

a {
    color: var(--primary-light);
    text-decoration: none;
}
a:hover {
    color: var(--primary-dark);
    text-decoration: underline;
}

/* --- 容器 --- */
.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 16px;
}

/* --- 头部 --- */
.header {
    background: var(--primary);
    color: #fff;
    padding: 20px 16px;
    text-align: center;
}
.header h1 {
    font-size: 1.3rem;
    font-weight: 600;
    letter-spacing: 1px;
}
.header .subtitle {
    font-size: 0.85rem;
    opacity: 0.8;
    margin-top: 4px;
}

/* --- 卡片 --- */
.card {
    background: var(--bg-white);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 24px 20px;
    margin-bottom: 16px;
}
.card h2 {
    font-size: 1.15rem;
    color: var(--primary);
    margin-bottom: 16px;
    padding-bottom: 10px;
    border-bottom: 2px solid var(--border-light);
}

/* --- 表单 --- */
.form-group {
    margin-bottom: 16px;
}
.form-group label {
    display: block;
    font-weight: 600;
    margin-bottom: 6px;
    color: var(--text);
    font-size: 0.9rem;
}
.form-group input,
.form-group select {
    width: 100%;
    padding: 10px 14px;
    border: 1px solid var(--border);
    border-radius: 6px;
    font-size: 0.95rem;
    font-family: inherit;
    color: var(--text);
    background: #fff;
    transition: border-color 0.2s;
    -webkit-appearance: none;
}
.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary-light);
    box-shadow: 0 0 0 3px rgba(41,128,185,0.1);
}
.form-group input::placeholder {
    color: #bbb;
}
.form-row {
    display: flex;
    gap: 12px;
}
.form-row .form-group {
    flex: 1;
}

/* --- 按钮 --- */
.btn {
    display: inline-block;
    padding: 10px 24px;
    font-size: 0.95rem;
    font-weight: 600;
    font-family: inherit;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    text-align: center;
    transition: all 0.2s;
    text-decoration: none;
    line-height: 1.5;
}
.btn:hover {
    text-decoration: none;
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(0,0,0,0.12);
}
.btn-primary {
    background: var(--primary-light);
    color: #fff;
}
.btn-primary:hover {
    background: var(--primary-dark);
    color: #fff;
}
.btn-danger {
    background: var(--danger);
    color: #fff;
}
.btn-danger:hover {
    background: #c0392b;
    color: #fff;
}
.btn-success {
    background: var(--success);
    color: #fff;
}
.btn-outline {
    background: transparent;
    color: var(--primary-light);
    border: 1px solid var(--primary-light);
}
.btn-outline:hover {
    background: var(--primary-light);
    color: #fff;
}
.btn-sm {
    padding: 5px 14px;
    font-size: 0.82rem;
}
.btn-block {
    display: block;
    width: 100%;
}

/* --- 前台查询主页 --- */
.query-section {
    text-align: center;
    padding: 40px 0 20px;
}
.query-section .icon {
    font-size: 3rem;
    margin-bottom: 12px;
}
.query-section .desc {
    color: var(--text-light);
    margin-bottom: 28px;
    font-size: 0.9rem;
}
.query-form {
    max-width: 420px;
    margin: 0 auto;
}
.query-form .btn {
    margin-top: 8px;
}

/* --- 证书展示页 --- */
.certificate-wrapper {
    padding: 20px 16px 40px;
    display: flex;
    justify-content: center;
}
.certificate {
    max-width: 750px;
    width: 100%;
    background: #fefefe;
    padding: 10px;
    border: 1px solid #d4a574;
    box-shadow: 0 4px 24px rgba(0,0,0,0.10);
}
.certificate-inner {
    border: 3px double #c9a87c;
    padding: 32px 28px;
    background: linear-gradient(135deg, #fffef9 0%, #fffef5 100%);
    text-align: center;
    position: relative;
}
.certificate-inner::before {
    content: '';
    position: absolute;
    top: 8px;
    left: 8px;
    right: 8px;
    bottom: 8px;
    border: 1px solid #e8d5b7;
    pointer-events: none;
}
.certificate-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: #8b0000;
    letter-spacing: 3px;
    margin-bottom: 28px;
    font-family: "STSong", "SimSun", "Songti SC", "Noto Serif SC", serif;
}
.certificate-body {
    text-align: left;
    text-indent: 2em;
    font-size: 1rem;
    line-height: 2;
    color: #3a3a3a;
    font-family: "STSong", "SimSun", "Songti SC", "Noto Serif SC", serif;
}
.certificate-body .student-info {
    font-weight: 600;
    color: #1a1a1a;
}
.certificate-body .course-name {
    font-weight: 600;
    color: #8b0000;
}
.certificate-body strong {
    color: #8b0000;
}
.certificate-footer {
    margin-top: 36px;
    text-align: right;
    padding-right: 12px;
}
.certificate-footer .organization {
    font-size: 0.95rem;
    font-weight: 600;
    color: #1a1a1a;
    letter-spacing: 1px;
    font-family: "STSong", "SimSun", "Songti SC", "Noto Serif SC", serif;
}
.certificate-footer .cert-number {
    font-size: 0.8rem;
    color: var(--text-lighter);
    margin-top: 8px;
    letter-spacing: 0.5px;
}

/* 证书查询结果提示 */
.cert-not-found {
    text-align: center;
    padding: 60px 20px;
}
.cert-not-found .icon {
    font-size: 3rem;
    margin-bottom: 12px;
}
.cert-not-found h3 {
    color: var(--danger);
    margin-bottom: 8px;
}
.cert-not-found p {
    color: var(--text-light);
    margin-bottom: 20px;
}

/* --- 管理员登录页 --- */
.login-section {
    min-height: 80vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}
.login-card {
    background: var(--bg-white);
    border-radius: var(--radius);
    box-shadow: 0 4px 20px rgba(0,0,0,0.1);
    padding: 32px 24px;
    width: 100%;
    max-width: 380px;
}
.login-card h2 {
    text-align: center;
    color: var(--primary);
    margin-bottom: 24px;
    font-size: 1.2rem;
}
.login-card .btn {
    margin-top: 8px;
}
.login-card .back-link {
    text-align: center;
    margin-top: 16px;
    font-size: 0.85rem;
}

/* --- 后台导航 --- */
.admin-nav {
    background: var(--primary-dark);
    padding: 0;
}
.admin-nav .container {
    display: flex;
    flex-wrap: wrap;
    gap: 0;
    padding: 0 8px;
}
.admin-nav a {
    display: inline-block;
    color: rgba(255,255,255,0.85);
    padding: 12px 16px;
    font-size: 0.88rem;
    text-decoration: none;
    transition: all 0.2s;
    border-bottom: 2px solid transparent;
}
.admin-nav a:hover,
.admin-nav a.active {
    color: #fff;
    background: rgba(255,255,255,0.08);
    border-bottom-color: #fff;
    text-decoration: none;
}
.admin-nav .nav-right {
    margin-left: auto;
}
.admin-nav .nav-right a {
    color: rgba(255,255,255,0.6);
}

/* --- 表格 --- */
.table-wrapper {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}
table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.9rem;
}
table th,
table td {
    padding: 10px 12px;
    text-align: left;
    border-bottom: 1px solid var(--border-light);
    white-space: nowrap;
}
table th {
    background: #f8f9fa;
    font-weight: 600;
    color: var(--text);
    font-size: 0.82rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}
table tbody tr:hover {
    background: #f8fafd;
}
table .actions {
    display: flex;
    gap: 6px;
}

/* --- 提示消息 --- */
.message {
    padding: 12px 16px;
    border-radius: 6px;
    margin-bottom: 16px;
    font-size: 0.9rem;
    line-height: 1.5;
}
.message-success {
    background: #eafaf1;
    color: #1e7e34;
    border: 1px solid #c3e6cb;
}
.message-error {
    background: #fdf2f2;
    color: #c0392b;
    border: 1px solid #f5c6cb;
}
.message-info {
    background: #eaf2f8;
    color: #1a5276;
    border: 1px solid #bee5eb;
}

/* --- 课程管理 --- */
.inline-form {
    display: flex;
    gap: 8px;
    align-items: center;
}
.inline-form input {
    flex: 1;
    padding: 8px 12px;
    border: 1px solid var(--border);
    border-radius: 6px;
    font-size: 0.9rem;
    font-family: inherit;
}
.inline-form input:focus {
    outline: none;
    border-color: var(--primary-light);
}
.edit-inline {
    display: flex;
    gap: 4px;
    align-items: center;
}
.edit-inline input {
    padding: 6px 10px;
    border: 1px solid var(--border);
    border-radius: 4px;
    font-size: 0.85rem;
    font-family: inherit;
    flex: 1;
    min-width: 120px;
}

/* --- 仪表盘 --- */
.dashboard-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 14px;
    margin-bottom: 20px;
}
.dash-card {
    background: var(--bg-white);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 20px;
    text-align: center;
    transition: transform 0.2s, box-shadow 0.2s;
    display: block;
    color: var(--text);
    text-decoration: none;
}
.dash-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0,0,0,0.12);
    text-decoration: none;
    color: var(--text);
}
.dash-card .dash-icon {
    font-size: 2rem;
    margin-bottom: 8px;
}
.dash-card .dash-label {
    font-weight: 600;
    font-size: 0.9rem;
    color: var(--primary);
}
.dash-card .dash-count {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--primary-light);
    margin: 4px 0;
}

/* --- 页脚 --- */
.footer {
    text-align: center;
    padding: 20px 16px;
    color: var(--text-lighter);
    font-size: 0.8rem;
    border-top: 1px solid var(--border-light);
    margin-top: 40px;
}

/* --- 后台面包屑 --- */
.breadcrumb {
    font-size: 0.85rem;
    color: var(--text-light);
    margin-bottom: 12px;
}
.breadcrumb a {
    color: var(--primary-light);
}

/* --- 删除确认 --- */
.confirm-box {
    text-align: center;
    padding: 20px;
}
.confirm-box .warning-icon {
    font-size: 3rem;
    margin-bottom: 12px;
}
.confirm-box .detail {
    background: #f8f9fa;
    padding: 14px;
    border-radius: 6px;
    margin: 16px 0;
    text-align: left;
    font-size: 0.9rem;
}
.confirm-box .detail span {
    display: block;
    margin-bottom: 4px;
}
.confirm-box .btn-group {
    display: flex;
    gap: 10px;
    justify-content: center;
    margin-top: 20px;
}

/* --- 导航栏扩展（更多菜单项） --- */
.admin-nav .container {
    flex-wrap: wrap;
    gap: 0;
    padding: 0 4px;
}
.admin-nav a {
    padding: 10px 12px;
    font-size: 0.82rem;
}
@media (min-width: 768px) {
    .admin-nav a {
        padding: 12px 14px;
        font-size: 0.85rem;
    }
}

/* --- 模板设计器 --- */
.designer-wrap {
    display: flex;
    gap: 20px;
    align-items: flex-start;
}
.designer-toolbar {
    width: 280px;
    flex-shrink: 0;
}
.designer-toolbar .card {
    margin-bottom: 12px;
    padding: 16px;
}
.designer-toolbar h3 {
    font-size: 0.9rem;
    color: var(--primary);
    margin-bottom: 10px;
    padding-bottom: 6px;
    border-bottom: 1px solid var(--border-light);
}
.designer-canvas-wrap {
    flex: 1;
    min-width: 0;
    overflow: auto;
}
.designer-canvas {
    position: relative;
    display: inline-block;
    border: 2px solid var(--border);
    background: repeating-conic-gradient(#f0f0f0 0% 25%, #fff 0% 50%) 0 0 / 20px 20px;
    cursor: default;
}
.designer-canvas.placing {
    cursor: crosshair;
}
.designer-canvas img {
    display: block;
    max-width: 100%;
    height: auto;
}

/* 元素覆盖层 */
.el-overlay {
    position: absolute;
    cursor: pointer;
    border: 1px dashed transparent;
    min-width: 20px;
    min-height: 10px;
    overflow: hidden;
}
.el-overlay:hover {
    border-color: var(--primary-light);
    background: rgba(41,128,185,0.08);
    z-index: 5;
}
.el-overlay.selected {
    border-color: var(--primary);
    background: rgba(41,128,185,0.15);
    z-index: 6;
}
.el-overlay .el-tools {
    display: none;
    position: absolute;
    top: -30px;
    left: 0;
    white-space: nowrap;
    gap: 4px;
    background: #fff;
    border-radius: 4px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.15);
    padding: 2px 4px;
}
.el-overlay:hover .el-tools {
    display: flex;
}
.el-tools button {
    font-size: 0.75rem;
    padding: 2px 8px;
    border: 1px solid #ddd;
    border-radius: 3px;
    background: #fff;
    cursor: pointer;
    font-family: inherit;
}
.el-tools button:hover {
    background: #f0f0f0;
}
.el-tools button.danger {
    color: var(--danger);
    border-color: var(--danger);
}

/* 工具栏按钮 */
.tool-btn {
    display: block;
    width: 100%;
    padding: 8px 12px;
    margin-bottom: 6px;
    border: 1px solid var(--border);
    border-radius: 6px;
    background: #fff;
    cursor: pointer;
    font-size: 0.85rem;
    font-family: inherit;
    text-align: left;
    transition: all 0.15s;
}
.tool-btn:hover {
    border-color: var(--primary-light);
    background: #f0f7fc;
}
.tool-btn.active {
    border-color: var(--primary);
    background: var(--primary-light);
    color: #fff;
}
.tool-btn.var {
    border-left: 3px solid var(--primary-light);
}
.tool-btn.fixed-text {
    border-left: 3px solid var(--success);
}

/* 元素列表 */
#element-list {
    list-style: none;
    max-height: 200px;
    overflow-y: auto;
}
#element-list li {
    font-size: 0.8rem;
    padding: 4px 8px;
    border-bottom: 1px solid var(--border-light);
    display: flex;
    justify-content: space-between;
    align-items: center;
    cursor: pointer;
}
#element-list li:hover {
    background: #f8fafd;
}

/* 状态栏 */
.status-bar {
    padding: 8px 16px;
    background: #f8f9fa;
    border-radius: 6px;
    font-size: 0.85rem;
    color: var(--text-light);
    margin-bottom: 12px;
}
.status-bar .badge {
    display: inline-block;
    background: var(--primary-light);
    color: #fff;
    padding: 1px 8px;
    border-radius: 10px;
    font-size: 0.75rem;
    margin: 0 4px;
}

/* --- 模态弹窗 --- */
.modal-mask {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.5);
    z-index: 1000;
    justify-content: center;
    align-items: center;
}
.modal-mask.show {
    display: flex;
}
.modal-box {
    background: #fff;
    border-radius: 10px;
    padding: 24px;
    max-width: 440px;
    width: 90%;
    max-height: 80vh;
    overflow-y: auto;
    box-shadow: 0 8px 40px rgba(0,0,0,0.2);
}
.modal-box h3 {
    margin-bottom: 16px;
    color: var(--primary);
}
.modal-box .form-row {
    display: flex;
    gap: 10px;
}
.modal-box .form-row .form-group {
    flex: 1;
}

/* --- 批量登记 --- */
.type-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 12px;
}
.type-card {
    border: 2px solid var(--border);
    border-radius: 8px;
    padding: 14px;
    transition: border-color 0.2s;
}
.type-card.checked {
    border-color: var(--primary-light);
    background: #f8fbfe;
}
.type-card label {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    font-weight: 600;
}
.type-card label input[type="checkbox"] {
    width: 18px;
    height: 18px;
    accent-color: var(--primary-light);
}
.type-card .course-select {
    margin-top: 10px;
    display: none;
}
.type-card.checked .course-select {
    display: block;
}
.type-card .course-select select {
    width: 100%;
    padding: 6px 10px;
    border: 1px solid var(--border);
    border-radius: 5px;
    font-size: 0.85rem;
}

/* --- 证书查看/下载 --- */
.view-actions {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    align-items: center;
    margin-bottom: 16px;
}
.view-actions .download-status {
    font-size: 0.85rem;
    color: var(--text-light);
    margin-left: 8px;
}
.cert-outer {
    padding: 10px 0;
    max-height: 75vh;
    overflow: auto;
}
.cert-render {
    display: block;
    box-shadow: 0 4px 24px rgba(0,0,0,0.12);
}
.cert-render.no-template {
    width: auto !important;
    height: auto !important;
    padding: 40px;
    text-align: left;
    background: #fefefe;
    border: 2px solid #d4a574;
}
.cert-render.no-template h2 {
    color: #8b0000;
    text-align: center;
    margin-bottom: 20px;
}

/* 前台查询结果页证书容器缩放 */
.cert-query-result {
    display: flex;
    justify-content: center;
    padding: 20px;
}

/* --- 模板设计器响应式 --- */
@media (max-width: 768px) {
    .designer-wrap {
        flex-direction: column;
    }
    .designer-toolbar {
        width: 100%;
    }
    .designer-canvas-wrap {
        width: 100%;
        overflow-x: auto;
    }
}

/* ========================================
   响应式 - 平板及以上
   ======================================== */
@media (min-width: 600px) {
    body {
        font-size: 16px;
    }
    .container {
        padding: 20px;
    }
    .header h1 {
        font-size: 1.5rem;
    }
    .card {
        padding: 28px 28px;
    }
    .certificate-title {
        font-size: 1.8rem;
    }
    .certificate-body {
        font-size: 1.05rem;
    }
    .certificate-inner {
        padding: 44px 40px;
    }
    .form-row {
        gap: 16px;
    }
}

@media (min-width: 768px) {
    .container {
        padding: 24px;
    }
    .certificate {
        padding: 14px;
    }
    .certificate-inner {
        padding: 52px 48px;
    }
    .certificate-title {
        font-size: 2rem;
        letter-spacing: 5px;
    }
    .login-card {
        padding: 40px 36px;
    }
    table th,
    table td {
        padding: 12px 16px;
    }
}

/* ========================================
   打印样式（后续启用）
   ======================================== */
@media print {
    .header, .footer, .back-link, .btn, .admin-nav {
        display: none !important;
    }
    .certificate {
        box-shadow: none;
        border: 1px solid #d4a574;
        max-width: 100%;
    }
    body {
        background: #fff;
    }
}