/* ========================================
   CourseQSort 选课系统 — 样式
   ======================================== */

/* ---- 基础 ---- */
.table th, .table td { vertical-align: middle; }
.btn-sm { padding: 0.25rem 0.5rem; font-size: 0.875rem; }

/* ---- 过渡动画 ---- */
.btn, .badge, .nav-link, .card, .free-slot-btn {
    transition: all 0.2s ease-in-out;
}
.card:hover { box-shadow: 0 4px 18px rgba(0,0,0,0.1); }
.table-hover tbody tr { transition: background-color 0.15s ease; }

/* ---- 冲突行 ---- */
tr.conflict-row { opacity: 0.65; }
tr.conflict-row td { background-color: #f8d7da !important; }
.conflict-badge { cursor: pointer; position: relative; }
.conflict-badge:hover { transform: scale(1.08); }

/* ---- 学分徽章（头部） ---- */
#total-credits {
    font-size: 13px;
    font-weight: 600;
    padding: 5px 10px;
    letter-spacing: 0.3px;
}
#total-credits.text-warning-bg { background: #fff3cd; color: #856404; }

/* ---- 课程分类标签 ---- */
.course-category-tag {
    display: inline-block;
    font-size: 11px;
    padding: 1px 6px;
    border-radius: 10px;
    margin-left: 4px;
    font-weight: 500;
    vertical-align: middle;
}
.cat-professional { background: #cfe2ff; color: #0a58ca; }   /* 专业课 */
.cat-elective { background: #e8daef; color: #6f42c1; }        /* 选修 */
.cat-general { background: #d1e7dd; color: #0f5132; }         /* 通识 */
.cat-pe { background: #f8d7da; color: #842029; }              /* 体育 */
.cat-required { background: #fff3cd; color: #856404; }        /* 专必 */

/* ---- 必修徽章 ---- */
.badge-mandatory {
    font-size: 11px;
    padding: 3px 7px;
    border-radius: 10px;
    font-weight: 600;
}
.badge-mandatory i { font-size: 10px; }

/* ---- 空闲时段按钮 ---- */
.free-slot-btn {
    display: block; width: 100%; text-align: left;
    margin-bottom: 2px;
    font-size: 13px;
    border: 1px solid #dee2e6;
}
.free-slot-btn:hover { border-color: #0d6efd; background: #f0f6ff; }
.free-slot-btn.active-slot {
    background: linear-gradient(135deg, #0d6efd, #0b5ed7);
    color: #fff;
    border-color: #0a58ca;
    font-weight: 600;
    box-shadow: 0 0 0 0.25rem rgba(13,110,253,0.2);
    transform: scale(1.02);
}

/* ---- 浮动冲突弹窗 ---- */
.conflict-popover-content {
    background: #fff;
    border: 1px solid #dc3545;
    border-radius: 8px;
    padding: 12px;
    box-shadow: 0 4px 16px rgba(220,53,69,0.2);
    max-width: 320px;
    font-size: 13px;
}
.conflict-popover-content ul { list-style: none; padding-left: 0; margin-bottom: 0; }
.conflict-popover-content li { border-bottom: 1px solid #f0f0f0; padding: 5px 0; }
.conflict-popover-content li:last-child { border-bottom: none; }

/* ---- 加载动画 ---- */
.loading-overlay {
    position: fixed; top: 0; left: 0; width: 100%; height: 100%;
    background: rgba(255,255,255,0.85);
    z-index: 9999;
    display: none;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

/* ---- 分页 ---- */
#prev-page-btn:disabled, #next-page-btn:disabled { opacity: 0.4; cursor: not-allowed; }

/* ---- 数据源标识 ---- */
#data-source-badge { font-size: 11px; padding: 3px 8px; }

/* ---- 导航 ---- */
.navbar-text { font-size: 14px; }

/* ---- 学生端按钮 ---- */
.select-btn { min-width: 60px; font-weight: 500; }
.select-btn:hover { transform: translateY(-1px); box-shadow: 0 2px 6px rgba(13,110,253,0.3); }
.drop-btn { line-height: 1; font-size: 12px; border-radius: 50%; width: 22px; height: 22px; padding: 0; }

/* ---- 已选课程列表 ---- */
#selected-list { max-height: 320px; overflow-y: auto; }
#selected-list ul { margin-bottom: 0; }
#selected-list .list-group-item {
    border-left: 3px solid transparent;
    transition: all 0.15s;
}
#selected-list .list-group-item:hover { background: #f8f9fa; }
#selected-list .list-group-item.mandatory-item { border-left-color: #ffc107; background: #fffdf5; }
#selected-list .list-group-item .credit-badge { font-size: 11px; padding: 2px 6px; }

/* ---- 空闲时段 ---- */
#free-slots-list { max-height: 350px; overflow-y: auto; }

/* ---- 管理端侧边栏 ---- */
#admin-sidebar .nav-link {
    border-radius: 6px;
    margin: 2px 4px;
    padding: 8px 12px;
    font-size: 14px;
}
#admin-sidebar .nav-link:hover { background: rgba(255,255,255,0.1); }
#admin-sidebar .nav-link.active {
    background: rgba(255,255,255,0.2);
    font-weight: 600;
    border-left: 3px solid #0d6efd;
}

/* ---- 管理端课程表格按钮组 ---- */
.admin-action-btns { display: flex; gap: 4px; flex-wrap: wrap; }
.admin-action-btns .btn {
    font-size: 12px;
    padding: 2px 8px;
    display: inline-flex;
    align-items: center;
    gap: 3px;
}

/* ---- 分配弹窗 ---- */
#course-assign-modal .modal-header { border-bottom: 2px solid #ffc107; }
#course-assign-modal .target-preview {
    background: #f8f9fa;
    border-radius: 8px;
    padding: 12px;
    margin-top: 8px;
    font-size: 13px;
}
#course-assign-modal .target-preview .badge {
    font-size: 12px;
    padding: 4px 10px;
}

/* ---- 管理端仪表板卡片 ---- */
#dashboard-cards .card {
    border-radius: 10px;
    border: none;
    transition: transform 0.2s, box-shadow 0.2s;
}
#dashboard-cards .card:hover { transform: translateY(-2px); box-shadow: 0 6px 20px rgba(0,0,0,0.12); }
#dashboard-cards .card .display-6 { font-weight: 700; }
#dashboard-cards .stat-icon {
    font-size: 2.2rem;
    opacity: 0.7;
    position: absolute;
    top: 10px;
    right: 15px;
}

/* ---- 响应式 ---- */
@media (max-width: 768px) {
    .col-md-9 { order: 2; }
    .col-md-3 { order: 1; }
    table { font-size: 12px; }
    .table th, .table td { padding: 0.3rem; }
}

/* 课程名过长换行 */
#course-list td:first-child { max-width: 150px; white-space: normal; word-break: break-all; }

/* ---- 算法参数滑块 ---- */
.form-range {
    -webkit-appearance: none;
    appearance: none;
    width: 100%;
    height: 8px;
    border-radius: 4px;
    outline: none;
    margin: 0;
    padding: 0;
    background: linear-gradient(to right, #0d6efd 0%, #0d6efd var(--fill, 50%), #dee2e6 var(--fill, 50%), #dee2e6 100%);
}
.form-range::-webkit-slider-runnable-track {
    height: 8px;
    border-radius: 4px;
    background: transparent;
}
.form-range::-moz-range-track {
    height: 8px;
    border-radius: 4px;
    background: transparent;
}
.form-range::-moz-range-progress {
    height: 8px;
    border-radius: 4px 0 0 4px;
    background: #0d6efd;
}
.form-range::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: #0d6efd;
    border: 2px solid #fff;
    box-shadow: 0 1px 4px rgba(0,0,0,.25);
    cursor: pointer;
    margin-top: -6px;
    transition: transform .15s, box-shadow .15s;
}
.form-range::-webkit-slider-thumb:hover {
    transform: scale(1.15);
    box-shadow: 0 2px 8px rgba(13,110,253,.35);
}
.form-range::-moz-range-thumb {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: #0d6efd;
    border: 2px solid #fff;
    box-shadow: 0 1px 4px rgba(0,0,0,.25);
    cursor: pointer;
}
.form-range:focus::-webkit-slider-thumb {
    box-shadow: 0 0 0 0.25rem rgba(13,110,253,.25);
}
.form-range:focus::-moz-range-thumb {
    box-shadow: 0 0 0 0.25rem rgba(13,110,253,.25);
}

/* ---- JSON 导入弹窗拖放区 ---- */
#import-drop-zone {
    border: 2px dashed #adb5bd;
    border-radius: 10px;
    padding: 40px 20px;
    text-align: center;
    cursor: pointer;
    transition: all .2s;
    background: #f8f9fa;
}
#import-drop-zone:hover,
#import-drop-zone.drag-over {
    border-color: #0d6efd;
    background: #e7f1ff;
}
#import-drop-zone .drop-icon {
    font-size: 3rem;
    color: #6c757d;
    margin-bottom: 8px;
}
#import-drop-zone.drag-over .drop-icon {
    color: #0d6efd;
}
#import-file-name {
    font-size: 13px;
    color: #198754;
    display: none;
}