/* =========================================
   QuizzUp Admin Panel Styles
   ========================================= */

.admin-layout {
    display: grid;
    grid-template-columns: 250px 1fr;
    gap: 2rem;
    height: calc(100vh - 100px);
    overflow: hidden;
}

.admin-sidebar {
    background: rgba(2, 6, 23, 0.6);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.admin-nav-btn {
    padding: 1rem;
    text-align: left;
    background: transparent;
    color: var(--text-secondary);
    border-radius: var(--radius-md);
    font-weight: 600;
    transition: all 0.2s;
    border: 1px solid transparent;
}

.admin-nav-btn:hover {
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-primary);
}

.admin-nav-btn.active {
    background: rgba(16, 185, 129, 0.1);
    color: var(--success);
    border-color: rgba(16, 185, 129, 0.3);
}

.admin-content {
    background: rgba(2, 6, 23, 0.4);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-lg);
    padding: 2rem;
    overflow-y: auto;
    backdrop-filter: blur(10px);
}

/* --- User Management Table --- */
.admin-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 1rem;
}

.admin-table th, .admin-table td {
    padding: 1rem;
    text-align: left;
    border-bottom: 1px solid var(--border-glass);
}

.admin-table th {
    color: var(--text-muted);
    font-size: 0.85rem;
    text-transform: uppercase;
}

.admin-action-btn {
    padding: 0.4rem 0.8rem;
    border-radius: 6px;
    font-size: 0.8rem;
    cursor: pointer;
    transition: background 0.2s;
}

.btn-danger {
    background: rgba(239, 68, 68, 0.1);
    color: var(--danger);
    border: 1px solid rgba(239, 68, 68, 0.3);
}
.btn-danger:hover { background: rgba(239, 68, 68, 0.2); }

.btn-warning {
    background: rgba(245, 158, 11, 0.1);
    color: var(--gold);
    border: 1px solid rgba(245, 158, 11, 0.3);
}
.btn-warning:hover { background: rgba(245, 158, 11, 0.2); }

/* --- Content Tree --- */
.content-tree {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.subject-block {
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-md);
    padding: 1rem;
}

.subject-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid var(--border-subtle);
}

.chapter-list {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
}

.chapter-tag {
    background: rgba(99, 102, 241, 0.1);
    color: var(--primary);
    padding: 0.5rem 1rem;
    border-radius: 100px;
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
    border: 1px solid transparent;
}

.chapter-tag:hover {
    border-color: var(--primary);
}

.add-btn {
    border: 1px dashed var(--border-subtle);
    color: var(--text-muted);
    background: transparent;
}
.add-btn:hover { border-color: var(--primary); color: var(--primary); }

/* --- Question Editor --- */
.editor-form {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    max-width: 800px;
}

.editor-row {
    display: grid;
    grid-template-columns: 150px 1fr;
    align-items: start;
    gap: 1rem;
}

.editor-row label {
    color: var(--text-secondary);
    padding-top: 0.5rem;
}

.admin-input {
    width: 100%;
    padding: 0.8rem;
    background: rgba(0,0,0,0.3);
    border: 1px solid var(--border-glass);
    color: var(--text-primary);
    border-radius: var(--radius-md);
    font-family: inherit;
}

.admin-input:focus { border-color: var(--primary); outline: none; }

.question-preview-item {
    padding: 1rem;
    border: 1px solid var(--border-glass);
    margin-bottom: 1rem;
    border-radius: var(--radius-md);
    cursor: pointer;
    background: rgba(2, 6, 23, 0.4);
}
.question-preview-item:hover {
    border-color: var(--text-secondary);
}