/* =====================================================
   lich-su-xem.css — CSS riêng cho trang Lịch sử xem
   Layout/component chung đã có trong main.css
   ===================================================== */

/* ===== TOOLBAR ===== */
.toolbar {
    display: flex;
    justify-content: flex-end;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
}

.search-container {
    display: flex;
    align-items: center;
    position: relative;
    flex: 0 1 360px;
    min-width: 200px;
}

.search-icon {
    position: absolute;
    left: 14px;
    color: var(--text-lighter);
    font-size: 0.85rem;
    pointer-events: none;
    z-index: 1;
}

.search-input {
    width: 100%;
    padding: 0.55rem 2.4rem;
    border: 1px solid var(--border);
    border-radius: 50px;
    background-color: var(--card-bg);
    color: var(--text);
    font-size: 0.9rem;
    transition: var(--transition);
    outline: none;
    font-family: inherit;
}

.search-input::placeholder { color: var(--text-lighter); }

.search-input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(58,152,185,0.12);
}

.clear-btn {
    position: absolute;
    right: 12px;
    color: var(--text-lighter);
    cursor: pointer;
    font-size: 0.85rem;
    padding: 4px;
    border-radius: 50%;
    transition: var(--transition);
    background: none;
    border: none;
    display: none;
    z-index: 1;
}

.clear-btn.visible { display: block; }
.clear-btn:hover   { color: var(--error); }

.filter-badge {
    display: none;
    align-items: center;
    gap: 0.4rem;
    background-color: rgba(58,152,185,0.1);
    color: var(--primary);
    padding: 0.3rem 0.8rem;
    border-radius: 50px;
    font-size: 0.8rem;
    font-weight: 500;
    white-space: nowrap;
}

.filter-badge.visible { display: inline-flex; }

/* ===== TABLE ===== */
.table-container {
    background-color: var(--card-bg);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.table-container:hover { box-shadow: var(--shadow-md); }

.table-wrapper { width: 100%; overflow-x: auto; }

table { width: 100%; border-collapse: collapse; font-size: 0.95rem; }

thead {
    background: linear-gradient(135deg, rgba(58,152,185,0.08), rgba(58,152,185,0.03));
    border-bottom: 2px solid var(--border);
}

thead th {
    padding: 0.9rem 1.5rem;
    text-align: left;
    font-weight: 600;
    color: var(--text-light);
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.6px;
    white-space: nowrap;
}

thead th i       { margin-right: 0.4rem; font-size: 0.75rem; }
thead th:last-child { text-align: center; }

tbody tr { border-bottom: 1px solid var(--border); transition: var(--transition); }
tbody tr:last-child { border-bottom: none; }
tbody tr:hover      { background-color: rgba(58,152,185,0.04); }

tbody tr.fade-in { animation: fadeInRow 0.3s ease; }

@keyframes fadeInRow {
    from { opacity: 0; transform: translateY(8px); }
    to   { opacity: 1; transform: translateY(0); }
}

tbody td            { padding: 0.9rem 1.5rem; vertical-align: middle; }
tbody td:last-child { text-align: center; }

/* ===== DOCUMENT INFO ===== */
.doc-info { display: flex; flex-direction: column; gap: 0.2rem; }
.doc-name { display: flex; align-items: center; gap: 0.75rem; }

.doc-icon {
    width: 38px;
    height: 38px;
    border-radius: var(--radius-sm);
    background: linear-gradient(135deg, rgba(58,152,185,0.12), rgba(58,152,185,0.05));
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary);
    font-size: 1rem;
    flex-shrink: 0;
    transition: var(--transition);
}

tbody tr:hover .doc-icon {
    background: linear-gradient(135deg, rgba(58,152,185,0.2), rgba(58,152,185,0.08));
    transform: scale(1.05);
}

.doc-link {
    color: var(--text);
    text-decoration: none;
    font-weight: 600;
    font-size: 1rem;
    transition: var(--transition);
    cursor: pointer;
}

.doc-link:hover { color: var(--primary); }

mark.highlight {
    background-color: rgba(255,184,48,0.3);
    padding: 0 0.15rem;
    border-radius: 2px;
    color: inherit;
}

.doc-meta {
    margin-left: 3.1rem;
    font-size: 0.78rem;
    color: var(--text-light);
    margin-top: 0.25rem;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.3rem;
    line-height: 1.4;
}

.meta-tag {
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
    padding: 0.1rem 0.5rem;
    border-radius: 50px;
    font-size: 0.7rem;
    font-weight: 500;
}

.meta-tag.giua-ki  { background-color: rgba(58,152,185,0.12); color: var(--primary); }
.meta-tag.cuoi-ki  { background-color: rgba(16,185,129,0.12);  color: var(--success); }
.meta-tag.de-cuong { background-color: rgba(245,158,11,0.12);  color: var(--warning); }
.meta-tag.de-thi   { background-color: rgba(239,68,68,0.12);   color: var(--error); }

[data-theme="dark"] .meta-tag.giua-ki  { background-color: rgba(74,177,209,0.2); }
[data-theme="dark"] .meta-tag.cuoi-ki  { background-color: rgba(16,185,129,0.2); }
[data-theme="dark"] .meta-tag.de-cuong { background-color: rgba(245,158,11,0.2); }
[data-theme="dark"] .meta-tag.de-thi   { background-color: rgba(239,68,68,0.2); }

.meta-time { color: var(--text-lighter); font-size: 0.72rem; }

/* ===== ACTION BUTTONS ===== */
.action-group { display: inline-flex; align-items: center; gap: 0.4rem; }

.action-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 34px;
    height: 34px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border);
    background-color: transparent;
    color: var(--text-light);
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
    font-size: 0.8rem;
    position: relative;
}

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

.action-btn.view-btn:hover {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: white;
    border-color: var(--primary);
}

.action-btn .btn-tooltip {
    position: absolute;
    bottom: -28px;
    left: 50%;
    transform: translateX(-50%);
    background-color: var(--card-bg);
    color: var(--text);
    padding: 0.2rem 0.6rem;
    border-radius: var(--radius-sm);
    font-size: 0.65rem;
    white-space: nowrap;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border);
    z-index: 10;
}

.action-btn:hover .btn-tooltip { opacity: 1; visibility: visible; }

/* ===== EMPTY STATE ===== */
.empty-state {
    text-align: center;
    padding: 4rem 2rem;
    color: var(--text-light);
}

.empty-state .empty-icon {
    font-size: 3.5rem;
    color: var(--border);
    margin-bottom: 1rem;
    display: block;
}

.empty-state h3 { font-size: 1.1rem; color: var(--text); margin-bottom: 0.4rem; }
.empty-state p  { color: var(--text-lighter); font-size: 0.9rem; }

.btn-go-exams {
    margin-top: 1.25rem;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.6rem 1.4rem;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: white;
    border-radius: 50px;
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    transition: var(--transition);
    border: none;
    cursor: pointer;
}

.btn-go-exams:hover { transform: translateY(-2px); box-shadow: var(--shadow-md); }

/* ===== NO RESULTS ===== */
.no-results { text-align: center; padding: 3rem 2rem; }
.no-results .no-results-icon { font-size: 2.5rem; color: var(--text-lighter); margin-bottom: 0.75rem; display: block; }
.no-results h4 { color: var(--text); font-size: 1.05rem; margin-bottom: 0.25rem; }
.no-results p  { color: var(--text-lighter); font-size: 0.9rem; }

.clear-search-btn {
    margin-top: 0.75rem;
    padding: 0.35rem 1.2rem;
    border: 1px solid var(--border);
    border-radius: 50px;
    background: none;
    color: var(--text-light);
    cursor: pointer;
    transition: var(--transition);
    font-size: 0.8rem;
}

.clear-search-btn:hover {
    background-color: var(--primary);
    color: white;
    border-color: var(--primary);
}

/* ===== SKELETON LOADING ===== */
.skeleton {
    background: linear-gradient(90deg, var(--border) 25%, rgba(255,255,255,0.1) 50%, var(--border) 75%);
    background-size: 200% 100%;
    animation: shimmer 1.5s infinite;
    border-radius: var(--radius-sm);
}

@keyframes shimmer {
    0%   { background-position: -200% 0; }
    100% { background-position:  200% 0; }
}

.sk-name { height: 16px; margin-bottom: 8px; }
.sk-meta { height: 12px; }

/* ===== TABLE FOOTER / PAGINATION ===== */
.table-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.8rem 1.5rem;
    border-top: 1px solid var(--border);
    font-size: 0.85rem;
    color: var(--text-light);
    flex-wrap: wrap;
    gap: 0.5rem;
    background-color: rgba(58,152,185,0.02);
}

.pagination { display: flex; gap: 0.25rem; align-items: center; }

.pagination button {
    width: 34px;
    height: 34px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border);
    background-color: transparent;
    color: var(--text-light);
    cursor: pointer;
    transition: var(--transition);
    font-size: 0.8rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

.pagination button:hover:not(:disabled) {
    background-color: var(--primary);
    color: white;
    border-color: var(--primary);
}

.pagination button:disabled { opacity: 0.4; cursor: not-allowed; }

.pagination button.active {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: white;
    border-color: var(--primary);
    font-weight: 600;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
    .toolbar         { justify-content: center; }
    .search-container { flex: 1; min-width: unset; max-width: 100%; }
    thead th, tbody td { padding: 0.65rem 0.8rem; }
    .doc-meta        { margin-left: 2.5rem; font-size: 0.7rem; }
    .action-btn      { width: 30px; height: 30px; font-size: 0.7rem; }
    .table-footer    { flex-direction: column; align-items: center; gap: 0.6rem; padding: 0.6rem 1rem; }
}

@media (max-width: 480px) {
    .main-content    { padding: 1rem; }
    .table-container { border-radius: var(--radius-sm); }
    thead th, tbody td { padding: 0.4rem 0.5rem; font-size: 0.75rem; }
    .search-input    { padding: 0.45rem 1rem 0.45rem 2rem; font-size: 0.8rem; }
    .doc-meta        { margin-left: 2rem; font-size: 0.65rem; }
    .meta-tag        { font-size: 0.6rem; padding: 0.05rem 0.4rem; }
    .doc-link        { font-size: 0.85rem; }
    .pagination button { width: 28px; height: 28px; font-size: 0.7rem; }
}