/**
 * 科目卡片：复用课程卡片结构，仅补充科目特有交互
 */

.lms-subject-grid {
    margin-top: 8px;
}

/* 闻思修中心：科目卡片边框/悬浮 — 颜色来自后台科目分类 CSS 变量 */
.lms-course-archive.lms-course-center .lms-course-card.lms-subject-card {
    background: #fff !important;
    border: 1px solid var(--lms-cat-glass-border, var(--lms-subject-color, #cf1020)) !important;
    box-shadow: 0 2px 10px rgba(15, 23, 42, 0.05) !important;
    transition: box-shadow 0.25s ease, transform 0.25s ease, border-color 0.25s ease;
}

.lms-course-archive.lms-course-center .lms-course-card.lms-subject-card:hover,
.lms-course-archive.lms-course-center .lms-course-card.lms-subject-card.hover {
    transform: translateY(-2px);
    border-color: var(--lms-cat-glass-border, var(--lms-subject-color, #cf1020)) !important;
    box-shadow: 0 8px 22px var(--lms-cat-glass-accent, rgba(148, 163, 184, 0.2)) !important;
}

.lms-course-archive.lms-course-center .lms-course-card.lms-subject-card.is-previewable {
    cursor: pointer;
}

.lms-course-archive.lms-course-center .lms-course-card.lms-subject-card.is-previewable:focus-visible {
    outline: 2px solid var(--lms-subject-color, #cf1020);
    outline-offset: 2px;
}

.lms-course-archive.lms-course-center .lms-course-card.lms-subject-card .lms-course-info {
    background: #fff;
}

/* 科目分类徽章：继承卡片上的后台主题色 */
.lms-subject-card .lms-course-category-badge .lms-subject-category-text {
    display: inline-block;
    padding: 4px 8px;
    border-radius: 12px;
    font-size: 12px;
    font-weight: 500;
    text-align: center;
    background: var(--lms-subject-color, #cf1020) !important;
    background-color: var(--lms-subject-color, #cf1020) !important;
    color: #fff;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.1);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

/* 封面区操作：对齐课程「加入」按钮位置 */
.lms-subject-card-actions {
    position: absolute;
    bottom: clamp(5px, 2%, 10px);
    right: clamp(3px, 2%, 10px);
    z-index: 12;
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: 6px;
    max-width: 52%;
}

.lms-subject-apply-btn {
    appearance: none;
    border: none;
    border-radius: clamp(4px, 0.8vw, 8px);
    padding: clamp(4px, 1vw, 8px) clamp(6px, 1.6vw, 14px);
    font-size: clamp(9px, 2.4vw, 12px);
    font-weight: 600;
    line-height: 1.25;
    cursor: pointer;
    background: var(--lms-subject-color, #cf1020);
    color: #fff;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.12);
    white-space: nowrap;
    max-width: 100%;
    overflow: hidden;
    text-overflow: ellipsis;
}

.lms-subject-apply-btn:hover:not(:disabled):not(.is-pending):not(.is-processed) {
    filter: brightness(0.95);
}

.lms-subject-apply-btn:disabled,
.lms-subject-apply-btn.is-pending,
.lms-subject-apply-btn.is-processed {
    cursor: default;
    background: rgba(255, 255, 255, 0.88);
    color: #4b5563;
    box-shadow: none;
    border: 1px solid rgba(255, 255, 255, 0.5);
}

.lms-subject-apply-btn.is-loading {
    opacity: 0.7;
    pointer-events: none;
}

.lms-cc-coming-soon {
    text-align: center;
    padding: 48px 20px;
    color: #4b5563;
}

.lms-cc-coming-soon-icon {
    font-size: 40px;
    margin-bottom: 12px;
}

.lms-cc-coming-soon-title {
    margin: 0 0 8px;
    font-size: 22px;
    color: #111827;
}

.lms-cc-coming-soon-message {
    margin: 0;
    font-size: 15px;
}

.lms-subject-filter-banner {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
    margin: 0 0 16px;
    padding: 12px 14px;
    border-radius: 10px;
    background: #fff7ed;
    border: 1px solid #fed7aa;
    color: #9a3412;
    font-size: 14px;
}

.lms-subject-filter-banner[hidden] {
    display: none !important;
}

.lms-subject-filter-clear {
    appearance: none;
    border: none;
    background: transparent;
    color: #c2410c;
    font-weight: 600;
    cursor: pointer;
    padding: 0;
    font-size: 14px;
}

.lms-subject-filter-clear:hover {
    text-decoration: underline;
}

.lms-subject-preview-overlay {
    position: fixed;
    inset: 0;
    z-index: 10050;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    background: rgba(15, 23, 42, 0.42);
    backdrop-filter: blur(6px);
    -webkit-backdrop-filter: blur(6px);
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.22s ease, visibility 0.22s ease;
}

.lms-subject-preview-overlay.is-open {
    opacity: 1;
    visibility: visible;
}

.lms-subject-preview-overlay[hidden] {
    display: none !important;
}

.lms-subject-preview-dialog {
    width: min(520px, 100%);
    max-height: min(78vh, 720px);
    display: flex;
    flex-direction: column;
    background: #fff;
    border-radius: 18px;
    border: 1px solid var(--lms-cat-glass-border, rgba(15, 23, 42, 0.1));
    box-shadow:
        0 24px 60px rgba(15, 23, 42, 0.2),
        0 0 0 1px rgba(255, 255, 255, 0.6) inset;
    overflow: hidden;
    transform: translateY(12px) scale(0.98);
    transition: transform 0.24s cubic-bezier(0.22, 1, 0.36, 1);
}

.lms-subject-preview-overlay.is-open .lms-subject-preview-dialog {
    transform: translateY(0) scale(1);
}

.lms-subject-preview-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 12px;
    padding: 18px 20px 16px;
    background: linear-gradient(
        135deg,
        var(--lms-cat-glass-from, rgba(207, 16, 32, 0.1)),
        var(--lms-cat-glass-to, rgba(255, 255, 255, 0.95))
    );
    border-bottom: 1px solid var(--lms-cat-glass-border, rgba(15, 23, 42, 0.08));
}

.lms-subject-preview-heading {
    min-width: 0;
    flex: 1;
}

.lms-subject-preview-title {
    margin: 0;
    font-size: 17px;
    font-weight: 700;
    line-height: 1.35;
    color: #0f172a;
    letter-spacing: -0.01em;
}

.lms-subject-preview-subtitle {
    margin: 6px 0 0;
    font-size: 13px;
    line-height: 1.4;
    color: var(--lms-subject-color, #64748b);
    font-weight: 500;
}

.lms-subject-preview-close {
    box-sizing: border-box;
    display: inline-flex !important;
    align-items: center;
    justify-content: center;
    appearance: none;
    -webkit-appearance: none;
    border: 1px solid rgba(15, 23, 42, 0.08) !important;
    background: rgba(255, 255, 255, 0.85) !important;
    color: #64748b !important;
    width: 34px;
    height: 34px;
    min-width: 34px;
    min-height: 34px;
    padding: 0 !important;
    margin: 0 !important;
    border-radius: 999px !important;
    font-size: 20px !important;
    font-weight: 400 !important;
    line-height: 1 !important;
    text-align: center;
    cursor: pointer;
    flex-shrink: 0;
    user-select: none;
    -webkit-user-select: none;
    transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

.lms-subject-preview-close:hover {
    background: #fff !important;
    color: #334155 !important;
    border-color: var(--lms-cat-glass-border, rgba(15, 23, 42, 0.12)) !important;
}

.lms-subject-preview-body {
    padding: 14px 20px 16px;
    overflow: auto;
    background: #fff;
}

.lms-subject-preview-desc {
    margin: 0 0 14px;
    padding: 12px 14px;
    font-size: 14px;
    line-height: 1.65;
    color: #475569;
    background: linear-gradient(
        135deg,
        var(--lms-cat-glass-from, rgba(207, 16, 32, 0.05)),
        #f8fafc
    );
    border-radius: 12px;
    border: 1px solid rgba(15, 23, 42, 0.06);
    white-space: pre-line;
}

.lms-subject-preview-desc[hidden] {
    display: none !important;
}

.lms-subject-preview-courses {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.lms-subject-preview-course-link {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 12px;
    border-radius: 12px;
    border: 1px solid rgba(15, 23, 42, 0.07);
    background: #fafbfc;
    text-decoration: none !important;
    color: inherit;
    transition: border-color 0.2s ease, box-shadow 0.2s ease, background 0.2s ease, transform 0.2s ease;
}

.lms-subject-preview-course-link.is-static {
    cursor: default;
}

.lms-subject-preview-course-link:not(.is-static):hover {
    border-color: var(--lms-cat-glass-border, rgba(207, 16, 32, 0.28));
    background: linear-gradient(
        135deg,
        var(--lms-cat-glass-from, rgba(207, 16, 32, 0.06)),
        #fff
    );
    box-shadow: 0 4px 14px var(--lms-cat-glass-accent, rgba(15, 23, 42, 0.08));
    transform: translateY(-1px);
}

.lms-subject-preview-thumb {
    width: 56px;
    height: 42px;
    border-radius: 8px;
    overflow: hidden;
    flex-shrink: 0;
    background: #f1f5f9;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid rgba(15, 23, 42, 0.06);
}

.lms-subject-preview-thumb.is-placeholder {
    font-size: 18px;
    background: linear-gradient(
        135deg,
        var(--lms-cat-glass-from, #f1f5f9),
        var(--lms-cat-glass-to, #fff)
    );
}

.lms-subject-preview-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.lms-subject-preview-course-meta {
    min-width: 0;
    flex: 1;
    display: flex;
    align-items: center;
}

.lms-subject-preview-course-title {
    font-size: 19px;
    font-weight: 600;
    color: #0f172a;
    line-height: 1.4;
}

.lms-subject-preview-lessons {
    flex-shrink: 0;
    align-self: center;
    font-size: 12px;
    font-weight: 600;
    line-height: 1;
    color: var(--lms-subject-color, #cf1020);
    background: var(--lms-cat-glass-from, rgba(207, 16, 32, 0.08));
    border: 1px solid var(--lms-cat-glass-border, rgba(207, 16, 32, 0.16));
    border-radius: 999px;
    padding: 6px 10px;
    white-space: nowrap;
}

.lms-subject-preview-empty {
    margin: 0;
    padding: 32px 12px;
    text-align: center;
    color: #64748b;
    font-size: 14px;
    background: #f8fafc;
    border-radius: 12px;
    border: 1px dashed rgba(15, 23, 42, 0.1);
}

.lms-subject-preview-footer {
    padding: 14px 20px 20px;
    border-top: 1px solid rgba(15, 23, 42, 0.06);
    background: linear-gradient(180deg, #fff 0%, #fafbfc 100%);
}

.lms-subject-preview-view-all {
    width: 100%;
    appearance: none;
    border: 1px solid transparent;
    border-radius: 12px;
    padding: 12px 16px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    background: var(--lms-subject-color, #cf1020) !important;
    color: #fff !important;
    box-shadow: 0 4px 14px var(--lms-cat-glass-accent, rgba(207, 16, 32, 0.25));
    transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease, transform 0.2s ease;
}

.lms-subject-preview-view-all:hover,
.lms-subject-preview-view-all:focus-visible {
    filter: none;
    background: linear-gradient(
        135deg,
        var(--lms-cat-glass-hover-from, rgba(207, 16, 32, 0.24)),
        var(--lms-cat-glass-hover-to, rgba(255, 255, 255, 0.98))
    ) !important;
    color: var(--lms-subject-color, #cf1020) !important;
    border-color: var(--lms-cat-glass-border, rgba(207, 16, 32, 0.32)) !important;
    box-shadow: 0 4px 16px var(--lms-cat-glass-accent, rgba(207, 16, 32, 0.2));
    transform: translateY(-1px);
    outline: none;
}

body.lms-subject-preview-open {
    overflow: hidden;
}

.lms-subject-filter-banner a {
    color: #c2410c;
    font-weight: 600;
    text-decoration: none;
}

.lms-subject-filter-banner a:hover {
    text-decoration: underline;
}

.lms-cc-empty-state {
    text-align: center;
    padding: 40px 16px;
    color: #6b7280;
}

.lms-cc-tab.is-soon .lms-cc-tab-badge {
    background: #f3f4f6;
    color: #6b7280;
}

@media (max-width: 768px) {
    .lms-subject-card-actions {
        max-width: 58%;
    }

    .lms-course-archive.lms-course-center .lms-cc-shell .lms-cc-tabs {
        grid-template-columns: repeat(4, minmax(0, 1fr));
    }
}