/* ============================================================
   问卷系统 - 全局样式表
   ============================================================ */

/* --- CSS 变量 --- */
:root {
    --primary: #4f46e5;
    --primary-light: #6366f1;
    --primary-dark: #4338ca;
    --primary-bg: #eef2ff;
    --accent: #f59e0b;
    --success: #10b981;
    --danger: #ef4444;
    --warning: #f59e0b;
    --info: #3b82f6;
    --body-bg: #f1f5f9;
    --card-bg: #ffffff;
    --card-shadow: 0 1px 3px rgba(0,0,0,.06), 0 1px 2px rgba(0,0,0,.04);
    --card-shadow-hover: 0 10px 15px -3px rgba(0,0,0,.08), 0 4px 6px -2px rgba(0,0,0,.04);
    --card-radius: 12px;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --border-color: #e2e8f0;
    --transition: all .25s ease;
}

/* --- 全局基础 --- */
body {
    background-color: var(--body-bg);
    color: var(--text-primary);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Noto Sans SC", sans-serif;
    min-height: 100vh;
}

a {
    color: var(--primary);
    transition: var(--transition);
}
a:hover {
    color: var(--primary-dark);
}

/* --- 导航栏 --- */
.navbar {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%) !important;
    box-shadow: 0 2px 8px rgba(79,70,229,.3);
    padding: .75rem 0;
}
.navbar-brand {
    font-weight: 700;
    font-size: 1.25rem;
    letter-spacing: -.02em;
}
.navbar .nav-link {
    color: rgba(255,255,255,.85) !important;
    font-weight: 500;
    border-radius: 6px;
    padding: .5rem .75rem !important;
    transition: var(--transition);
}
.navbar .nav-link:hover {
    color: #fff !important;
    background: rgba(255,255,255,.12);
}

/* --- 卡片 --- */
.card {
    border: 1px solid var(--border-color);
    border-radius: var(--card-radius);
    box-shadow: var(--card-shadow);
    background: var(--card-bg);
    transition: var(--transition);
    margin-bottom: 1.25rem;
}
.card:hover {
    box-shadow: var(--card-shadow-hover);
}
.card-header {
    background: var(--primary-bg);
    border-bottom: 1px solid var(--border-color);
    font-weight: 600;
    border-radius: var(--card-radius) var(--card-radius) 0 0 !important;
    padding: 1rem 1.25rem;
}
.card-header.bg-primary {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%) !important;
    color: #fff;
}
.card-body {
    padding: 1.25rem;
}
.card-footer {
    background: #f8fafc;
    border-top: 1px solid var(--border-color);
    border-radius: 0 0 var(--card-radius) var(--card-radius) !important;
}

/* --- 按钮 --- */
.btn-primary {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
    border: none;
    border-radius: 8px;
    font-weight: 500;
    padding: .5rem 1.25rem;
    transition: var(--transition);
}
.btn-primary:hover {
    background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 100%);
    box-shadow: 0 4px 12px rgba(79,70,229,.35);
    transform: translateY(-1px);
}
.btn-success {
    background: linear-gradient(135deg, #059669 0%, #10b981 100%);
    border: none;
    border-radius: 8px;
    font-weight: 500;
    transition: var(--transition);
}
.btn-success:hover {
    box-shadow: 0 4px 12px rgba(16,185,129,.35);
    transform: translateY(-1px);
}
.btn-warning {
    background: linear-gradient(135deg, #d97706 0%, #f59e0b 100%);
    border: none;
    border-radius: 8px;
    font-weight: 500;
    color: #fff;
    transition: var(--transition);
}
.btn-warning:hover {
    box-shadow: 0 4px 12px rgba(245,158,11,.35);
    transform: translateY(-1px);
    color: #fff;
}
.btn-danger {
    background: linear-gradient(135deg, #dc2626 0%, #ef4444 100%);
    border: none;
    border-radius: 8px;
    font-weight: 500;
    transition: var(--transition);
}
.btn-danger:hover {
    box-shadow: 0 4px 12px rgba(239,68,68,.35);
    transform: translateY(-1px);
}
.btn-info {
    background: linear-gradient(135deg, #2563eb 0%, #3b82f6 100%);
    border: none;
    border-radius: 8px;
    font-weight: 500;
    color: #fff;
    transition: var(--transition);
}
.btn-info:hover {
    box-shadow: 0 4px 12px rgba(59,130,246,.35);
    transform: translateY(-1px);
    color: #fff;
}
.btn-outline-primary {
    border-color: var(--primary);
    color: var(--primary);
    border-radius: 8px;
    font-weight: 500;
    transition: var(--transition);
}
.btn-outline-primary:hover {
    background: var(--primary);
    border-color: var(--primary);
    box-shadow: 0 4px 12px rgba(79,70,229,.25);
}
.btn-outline-success {
    border-color: var(--success);
    color: var(--success);
    border-radius: 8px;
    font-weight: 500;
}
.btn-outline-success:hover {
    background: var(--success);
    border-color: var(--success);
}
.btn-outline-danger {
    border-color: var(--danger);
    color: var(--danger);
    border-radius: 8px;
}
.btn-outline-danger:hover {
    background: var(--danger);
    border-color: var(--danger);
}
.btn-sm {
    border-radius: 6px;
}
.btn-lg {
    border-radius: 10px;
    padding: .75rem 2rem;
}

/* --- 表单 --- */
.form-control, .form-select {
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: .55rem .85rem;
    transition: var(--transition);
    font-size: .95rem;
}
.form-control:focus, .form-select:focus {
    border-color: var(--primary-light);
    box-shadow: 0 0 0 3px rgba(99,102,241,.15);
}
.form-label {
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: .35rem;
    font-size: .9rem;
}
.form-text {
    font-size: .85rem;
}
.input-group .btn {
    border-radius: 0 8px 8px 0;
}

/* --- 表格 --- */
.table {
    border-collapse: separate;
    border-spacing: 0;
}
.table thead th {
    background: var(--primary-bg);
    font-weight: 600;
    font-size: .85rem;
    text-transform: uppercase;
    letter-spacing: .03em;
    color: var(--text-secondary);
    border-bottom: 2px solid var(--border-color);
    padding: .75rem 1rem;
}
.table tbody td {
    vertical-align: middle;
    padding: .75rem 1rem;
    border-bottom: 1px solid var(--border-color);
}
.table tbody tr:hover {
    background: #f8fafc;
}
.table td:first-child,
.table th:first-child {
    text-align: center;
    vertical-align: middle;
}

/* --- 徽章 --- */
.badge {
    font-weight: 500;
    font-size: .78em;
    padding: .4em .7em;
    border-radius: 6px;
}
.badge.bg-success { background: linear-gradient(135deg, #059669, #10b981) !important; }
.badge.bg-danger  { background: linear-gradient(135deg, #dc2626, #ef4444) !important; }
.badge.bg-warning { background: linear-gradient(135deg, #d97706, #f59e0b) !important; color: #fff !important; }
.badge.bg-info    { background: linear-gradient(135deg, #2563eb, #3b82f6) !important; }
.badge.bg-primary { background: linear-gradient(135deg, var(--primary), var(--primary-light)) !important; }

/* --- 警告框 --- */
.alert {
    border-radius: 10px;
    border: none;
    font-weight: 500;
    padding: .85rem 1.25rem;
}
.alert-success { background: #ecfdf5; color: #065f46; }
.alert-danger  { background: #fef2f2; color: #991b1b; }
.alert-warning { background: #fffbeb; color: #92400e; }
.alert-info    { background: #eff6ff; color: #1e40af; }

/* --- 页脚 --- */
.footer {
    margin-top: 3rem;
    padding: 1.5rem 0;
    background: #f8fafc;
    border-top: 1px solid var(--border-color);
    color: var(--text-secondary);
    font-size: .9rem;
}

/* --- 统计卡片 --- */
.stats-card {
    margin-bottom: 1.25rem;
}
.stats-card .card-body {
    text-align: center;
}
.stats-card .display-4 {
    font-size: 2.25rem;
    font-weight: 700;
    color: var(--primary);
}

/* --- 问卷问题 --- */
.survey-question {
    margin-bottom: 1.5rem;
    padding: 1.25rem;
    background: var(--card-bg);
    border-radius: var(--card-radius);
    border: 1px solid var(--border-color);
    box-shadow: var(--card-shadow);
    transition: var(--transition);
}
.survey-question:hover {
    border-color: var(--primary-light);
    box-shadow: var(--card-shadow-hover);
}
.question-required {
    position: relative;
}
.question-required::before {
    content: '';
    position: absolute;
    left: -8px;
    top: 0;
    bottom: 0;
    width: 4px;
    background: var(--danger);
    border-radius: 2px;
}
.question-required::after {
    content: " *";
    color: var(--danger);
}
.question-error {
    border-color: var(--danger) !important;
    background: #fff5f5;
    padding: 1.25rem !important;
}

/* --- 选项进度条 --- */
.option-bar {
    height: 30px;
    background: linear-gradient(90deg, var(--primary) 0%, var(--primary-light) 100%);
    border-radius: 6px;
    margin-bottom: .5rem;
    color: #fff;
    padding-left: 10px;
    line-height: 30px;
    font-weight: 500;
    font-size: .85rem;
}

/* --- 进度条 --- */
.progress {
    background: #e2e8f0;
    border-radius: 6px;
    height: 25px;
}
.progress-bar {
    background: linear-gradient(90deg, var(--primary) 0%, var(--primary-light) 100%);
    transition: width .6s ease;
}

/* --- Tab 样式 --- */
.nav-tabs .nav-link {
    border: none;
    color: var(--text-secondary);
    padding: 12px 20px;
    font-weight: 500;
    transition: var(--transition);
    border-radius: 8px 8px 0 0;
}
.nav-tabs .nav-link:hover {
    color: var(--text-primary);
    background: #f8fafc;
    border-bottom: 3px solid var(--border-color);
}
.nav-tabs .nav-link.active {
    color: var(--primary);
    background: var(--card-bg);
    border-bottom: 3px solid var(--primary);
    font-weight: 600;
}
.card-header-tabs {
    margin-right: 0;
    margin-left: 0;
    border-bottom: 1px solid var(--border-color);
}

/* --- 搜索框 --- */
.search-input {
    border-radius: 20px;
    padding-left: 15px;
}
.search-input:focus {
    box-shadow: 0 0 0 3px rgba(99,102,241,.15);
    border-color: var(--primary-light);
}

/* --- 分页 --- */
.pagination {
    margin-bottom: 0;
}
.pagination .page-link {
    cursor: pointer;
    user-select: none;
    border-radius: 6px;
    margin: 0 2px;
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
}
.pagination .page-item.active .page-link {
    background: var(--primary);
    border-color: var(--primary);
    color: #fff;
}
.pagination .page-item.disabled .page-link {
    pointer-events: none;
    opacity: .5;
}

/* --- 列表组 --- */
.list-group-item {
    border-left: none;
    border-right: none;
    padding: .85rem 1.25rem;
}
.list-group-item:first-child { border-top: none; }
.list-group-item:last-child  { border-bottom: none; }

/* --- 模态框 --- */
.modal-content {
    border-radius: var(--card-radius);
    border: none;
    box-shadow: 0 20px 60px rgba(0,0,0,.15);
}

/* --- 排序拖拽 --- */
.sortable-item {
    cursor: move;
    transition: var(--transition);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 1rem;
    margin-bottom: .5rem;
    background: var(--card-bg);
}
.sortable-item.dragging {
    opacity: .5;
    transform: rotate(2deg);
    background: #f8fafc;
    border: 2px dashed var(--primary);
}
.sortable-item.over {
    border-top: 2px solid var(--primary);
}
.handle {
    cursor: move;
    user-select: none;
}
.question-item {
    transition: var(--transition);
    user-select: none;
}
.question-item.dragging {
    opacity: .5;
    background: #f8fafc;
}
.question-item.drag-over {
    border-top: 2px solid var(--primary);
    margin-top: 2px;
}

/* --- 抽奖区域 --- */
.lottery-container {
    background: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
    border-radius: var(--card-radius);
    padding: 1.5rem;
    text-align: center;
    color: #fff;
    margin: 1.25rem 0 0;
}
.lottery-box {
    background: rgba(255,255,255,.15);
    border-radius: 15px;
    padding: 2rem;
    margin: 1.25rem 0;
    backdrop-filter: blur(4px);
}
.lottery-btn {
    background: linear-gradient(135deg, #f59e0b 0%, #f97316 100%);
    border: none;
    border-radius: 50px;
    padding: 15px 50px;
    font-size: 1.1rem;
    font-weight: 600;
    color: #fff;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: 0 4px 15px rgba(249,115,22,.35);
}
.lottery-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(249,115,22,.45);
}
.lottery-btn:disabled {
    background: #6c757d;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}
.prize-result {
    background: rgba(255,255,255,.2);
    border-radius: 15px;
    padding: 1.25rem;
    margin-top: 1.25rem;
    animation: fadeIn .5s ease;
}
.prize-code {
    background: rgba(0,0,0,.25);
    border-radius: 10px;
    padding: 10px;
    font-size: 1rem;
    font-family: "Courier New", monospace;
    margin: 1rem 0;
    word-break: break-all;
}
.prize-code-highlight {
    color: #fbbf24;
    font-weight: 700;
}
.prize-notice {
    color: #fca5a5;
    font-size: .9rem;
}
.spinner {
    animation: spin 1s linear infinite;
}
.spinner-lg {
    width: 3rem;
    height: 3rem;
}
.confetti {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 9999;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to   { opacity: 1; transform: translateY(0); }
}
@keyframes spin {
    from { transform: rotate(0deg); }
    to   { transform: rotate(360deg); }
}
@keyframes blinker {
    50% { opacity: .5; }
}

.blinking-text {
    animation: blinker 2s linear infinite;
}

/* --- 图标尺寸 --- */
.icon-xl {
    font-size: 3rem;
    color: var(--text-secondary);
}

/* --- 统计卡片 --- */
.stat-card {
    background: #ffffff;
    border: 1px solid var(--border-color);
    border-radius: var(--card-radius);
    padding: 1.25rem;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}
.stat-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--card-shadow-hover);
}
.stat-card .stat-icon {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
}
.stat-card .stat-label {
    font-size: .85rem;
    color: var(--text-secondary);
    margin-bottom: .25rem;
    font-weight: 500;
}
.stat-card .stat-value {
    font-size: 1.75rem;
    font-weight: 700;
    line-height: 1.2;
}
.stat-card .stat-sub {
    font-size: .75rem;
    color: var(--text-secondary);
    margin-top: .25rem;
}
/* 统计卡片 - 蓝色主题 */
.stat-card-blue .stat-icon {
    background: #eff6ff;
    color: #3b82f6;
}
.stat-card-blue .stat-value {
    color: #2563eb;
}
/* 统计卡片 - 绿色主题 */
.stat-card-green .stat-icon {
    background: #ecfdf5;
    color: #10b981;
}
.stat-card-green .stat-value {
    color: #059669;
}
/* 统计卡片 - 橙色主题 */
.stat-card-orange .stat-icon {
    background: #fffbeb;
    color: #f59e0b;
}
.stat-card-orange .stat-value {
    color: #d97706;
}
/* 统计卡片 - 紫色主题 */
.stat-card-purple .stat-icon {
    background: #f5f3ff;
    color: #8b5cf6;
}
.stat-card-purple .stat-value {
    color: #7c3aed;
}
.icon-lg {
    font-size: 2.5rem;
}
.icon-md {
    font-size: 2rem;
}
.icon-sm {
    margin-right: 5px;
}

/* --- 工具类 --- */
.text-danger-highlight {
    color: var(--danger);
    font-weight: 600;
}
.text-accent {
    color: var(--accent);
}
.captcha-input {
    max-width: 120px;
}
.captcha-img {
    height: 38px;
    cursor: pointer;
    border-radius: 6px;
}
.survey-desc {
    font-size: 1.1rem;
    line-height: 1.7;
}
.hidden {
    display: none !important;
}
.inline-form {
    display: inline;
}
.grip-handle {
    cursor: move;
}

/* --- 按钮组 --- */
.btn-group .btn {
    border-radius: 6px !important;
    margin-right: 2px;
}

/* --- 响应式 --- */
@media (max-width: 768px) {
    .display-4 {
        font-size: 1.8rem;
    }
    .nav-tabs .nav-link {
        padding: 8px 12px;
        font-size: .875rem;
    }
    .card-body {
        padding: 1rem;
    }
    .stats-card .display-4 {
        font-size: 1.6rem;
    }
}