.tasks-layout {
    display: grid;
    grid-template-columns: 260px 1fr;
    gap: 2.5rem;
    align-items: start;
}

.tasks-sidebar {
    position: sticky;
    top: 90px;
}

.tasks-sidebar-inner {
    background: var(--color-bg-card, white);
    border-radius: var(--radius-md, 12px);
    box-shadow: var(--shadow-sm, 0 1px 6px rgba(0,0,0,0.06));
    padding: 1.5rem;
}

.tasks-sidebar-label {
    font-size: var(--text-sm);
    color: var(--color-brand);
    font-weight: var(--font-medium);
    padding-bottom: 0.625rem;
    margin-bottom: 0.625rem;
    padding-left: 0;
    border-bottom: 1px solid var(--color-border-light, rgba(0, 0, 0, 0.06));
}

.tasks-sidebar-nav {
    display: flex;
    flex-direction: column;
    gap: 0;
}

.tasks-sidebar-link {
    display: block;
    padding: 12px 16px;
    color: var(--color-text-secondary);
    text-decoration: none;
    font-size: var(--text-md);
    border-radius: var(--radius-sm, 8px);
    border-left: none;
    transition: all 0.2s ease;
    line-height: var(--leading-normal, 1.5);
}

.tasks-sidebar-link:hover {
    color: var(--color-text-heading);
    background: var(--color-bg-hover, #f8fafc);
}

.tasks-sidebar-link.active {
    color: var(--color-text-heading);
    font-weight: var(--font-bold);
    background: var(--color-brand-bg, #f5f3ff);
}

.tasks-sidebar-link.sub-item {
    padding-left: 24px;
    font-size: var(--text-md);
    color: var(--color-text-muted);
    border-left: 1px solid var(--color-border, #e2e8f0);
    border-radius: 0;
    border-top-right-radius: var(--radius-sm, 8px);
    border-bottom-right-radius: var(--radius-sm, 8px);
}

.tasks-sidebar-link.sub-item:hover {
    color: var(--color-text-heading);
    border-left: 3px solid var(--color-text-heading, #1e293b);
    background: var(--color-bg-hover, #f8fafc);
}

.tasks-sidebar-link.sub-item.active {
    color: var(--color-text-heading);
    font-weight: var(--font-semibold);
    border-left: 3px solid var(--color-brand, #9333ea);
    background: var(--color-brand-bg, #f5f3ff);
}

/* ===== Submenu toggle button ===== */
button.tasks-sidebar-submenu-toggle {
    appearance: none;
    -webkit-appearance: none;
    background: none;
    border: none;
    cursor: pointer;
    width: 100%;
    text-align: left;
    font-family: inherit;
    display: flex;
    align-items: center;
    gap: 8px;
}

.submenu-chevron {
    flex-shrink: 0;
    transition: transform 0.25s ease;
    color: var(--color-text-muted, #94a3b8);
}

button.tasks-sidebar-submenu-toggle[aria-expanded="true"] .submenu-chevron {
    transform: rotate(90deg);
}

/* ===== Submenu container ===== */
.tasks-sidebar-submenu {
    display: grid;
    grid-template-rows: 0fr;
    transition: grid-template-rows 0.25s ease;
    overflow: hidden;
}

.tasks-sidebar-submenu.open {
    grid-template-rows: 1fr;
}

.tasks-sidebar-submenu > div {
    min-height: 0;
    overflow: hidden;
}

/* ===== Sub-sub-item (inside submenu) ===== */
.tasks-sidebar-link.sub-sub-item {
    padding-left: 40px;
    color: var(--color-text-muted);
    border-left: 1px solid var(--color-border, #e2e8f0);
    border-radius: 0;
    border-top-right-radius: var(--radius-sm, 8px);
    border-bottom-right-radius: var(--radius-sm, 8px);
}

.tasks-sidebar-link.sub-sub-item:hover {
    color: var(--color-text-heading);
    border-left: 3px solid var(--color-text-heading, #1e293b);
    background: var(--color-bg-hover, #f8fafc);
}

.tasks-sidebar-link.sub-sub-item.active {
    color: var(--color-text-heading);
    font-weight: var(--font-semibold);
    border-left: 3px solid var(--color-brand, #9333ea);
    background: var(--color-brand-bg, #f5f3ff);
}

.tasks-content {
    min-width: 0;
}

.tasks-content-hero {
    position: relative;
    border-radius: var(--radius-lg, 16px);
    overflow: hidden;
    height: 280px;
}

.tasks-content-hero img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.tasks-content-hero-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 2rem;
    background: linear-gradient(transparent, rgba(0,0,0,0.6));
}

.tasks-content-hero-overlay h2 {
    color: var(--color-text-white);
    font-size: var(--text-3xl);
    font-weight: var(--font-bold);
    margin: 0;
}

.tasks-overview-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.25rem;
}

.tasks-overview-card {
    background: var(--color-bg-page, #f8fafc);
    border-radius: var(--radius-md, 12px);
    padding: 1.5rem;
    text-decoration: none;
    border: 1px solid var(--color-border, #e2e8f0);
    transition: all 0.25s ease;
}

.tasks-overview-card:hover {
    background: var(--color-bg-card, white);
    box-shadow: var(--shadow-md, 0 4px 20px rgba(0,0,0,0.08));
    border-color: #c4b5fd;
    transform: translateY(-2px);
}

.tasks-overview-icon {
    width: 48px;
    height: 48px;
    background: var(--gradient-brand, linear-gradient(135deg, #9333ea 0%, #ec4899 50%, #f97316 100%));
    border-radius: var(--radius-md, 12px);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1rem;
}

.tasks-overview-card h3 {
    font-size: var(--text-lg);
    font-weight: var(--font-semibold);
    color: var(--color-text-heading);
    margin-bottom: 0.5rem;
}

.tasks-overview-card p {
    font-size: var(--text-base);
    color: var(--color-text-muted);
    margin: 0;
    line-height: var(--leading-relaxed, 1.6);
}

.tasks-detail-section {
    margin-top: 2rem;
}

.tasks-detail-section h3 {
    font-size: var(--text-2xl);
    font-weight: var(--font-bold);
    color: var(--color-text-heading);
    margin-bottom: 1rem;
}

.tasks-detail-section p {
    line-height: var(--leading-relaxed, 1.6);
}

.tasks-detail-info {
    background: var(--color-bg-card, white);
    border-radius: var(--radius-md, 12px);
    padding: 1rem;
    border: 1px solid var(--color-border, #e2e8f0);
    margin: 1.5rem 0;
}

.tasks-detail-info h4 {
    font-size: var(--text-lg);
    font-weight: var(--font-semibold);
    margin-bottom: 0.75rem;
}

.tasks-detail-info ul {
    margin: 0;
    padding-left: 1.25rem;
    color: var(--color-text-secondary);
}

.tasks-detail-info li {
    margin-bottom: 0.25rem;
    line-height: var(--leading-tight, 1.4);
}

.tasks-detail-info.tasks-detail-info-2col {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 0 2rem;
    align-items: start;
    background: none;
    border: none;
    border-radius: 0;
    padding: 0;
    margin: 1.5rem 0;
}

.tasks-detail-info.tasks-detail-info-2col h4 {
    margin-bottom: 0;
    padding-top: 2px;
}

.tasks-medal-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: var(--text-sm);
    font-weight: var(--font-semibold);
}

.tasks-medal-badge.bronze {
    background: #fef3c7;
    color: var(--color-status-warning-darker);
}

.tasks-medal-badge.silver {
    background: var(--color-bg-muted, #f1f5f9);
    color: var(--color-text-secondary);
}

.tasks-medal-badge.gold {
    background: #fffbeb;
    color: var(--color-status-warning-dark);
}

.tasks-medal-badge.purple {
    background: #f3e8ff;
    color: #7c3aed;
}

.tasks-sidebar-mobile {
    display: none;
}

.tasks-sidebar-label-desktop {
    display: block;
}

.tasks-sidebar-nav-desktop {
    display: flex;
}

@media (max-width: 992px) {
    .tasks-layout {
        grid-template-columns: 1fr;
        gap: 0;
    }

    .tasks-sidebar {
        position: static;
        margin-bottom: 1.5rem;
    }

    .tasks-sidebar-inner {
        padding: 0;
        background: none;
        border: none;
        box-shadow: none;
    }

    .tasks-sidebar-label-desktop,
    .tasks-sidebar-nav-desktop {
        display: none !important;
    }

    .tasks-sidebar-mobile {
        display: block;
    }

    .tasks-sidebar-toggle {
        display: flex;
        align-items: center;
        justify-content: space-between;
        padding: 12px 20px;
        background: var(--color-bg-card, white);
        border-radius: var(--radius-md, 12px);
        cursor: pointer;
        transition: all 0.2s ease;
        box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
    }

    .tasks-sidebar-toggle:hover {
        background: var(--color-bg-card, white);
    }

    .tasks-sidebar-toggle-text {
        display: flex;
        align-items: center;
        gap: 0;
        font-size: var(--text-md);
        color: var(--color-text-secondary);
        min-width: 0;
        overflow: hidden;
    }

    .tasks-sidebar-toggle-title {
        color: var(--color-text-light);
        flex-shrink: 0;
    }

    .tasks-sidebar-toggle-parent {
        color: var(--color-text-heading);
        font-weight: var(--font-semibold);
        flex-shrink: 0;
    }

    .tasks-sidebar-toggle-sep {
        color: var(--color-text-gray-light);
        margin: 0 8px;
        flex-shrink: 0;
    }

    .tasks-sidebar-toggle-current {
        color: var(--color-brand);
        font-weight: var(--font-semibold);
        white-space: nowrap;
        overflow: hidden;
        text-overflow: ellipsis;
    }

    .tasks-sidebar-toggle-icon {
        font-size: var(--text-2xl);
        color: var(--color-text-muted);
        font-weight: var(--font-light);
        line-height: 1;
        flex-shrink: 0;
        margin-left: 12px;
        transition: transform 0.2s ease;
    }

    .tasks-sidebar-dropdown {
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.3s ease, padding 0.3s ease;
        background: var(--color-bg-card, white);
        border-radius: 0 0 var(--radius-md, 12px) var(--radius-md, 12px);
        border-top: none;
        box-shadow: none;
        padding: 0 16px;
    }

    .tasks-sidebar-dropdown.open {
        max-height: 600px;
        padding: 12px 16px 16px 16px;
        border-color: var(--color-border);
        box-shadow: 0 4px 12px rgba(0, 0, 0, 0.06);
    }

    .tasks-sidebar-dropdown .tasks-sidebar-label {
        display: block;
        margin-bottom: 0.75rem;
    }

    .tasks-sidebar-toggle.open {
        border-radius: var(--radius-md, 12px) var(--radius-md, 12px) 0 0;
        box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
        background-color: var(--color-bg-page);
    }

    .tasks-sidebar-toggle.open .tasks-sidebar-toggle-icon {
        transform: rotate(45deg);
    }
}

@media (max-width: 768px) {
    .tasks-content-hero {
        height: 180px;
        border-radius: var(--radius-md, 12px);
    }

    .tasks-content-hero-overlay h2 {
        font-size: var(--text-2xl);
    }

    .tasks-overview-grid {
        grid-template-columns: 1fr 1fr;
        gap: 1rem;
    }

    .tasks-overview-card {
        padding: 1.25rem;
    }

    .tasks-detail-info.tasks-detail-info-2col {
        grid-template-columns: 1fr;
        gap: 0.5rem 0;
    }
}

@media (max-width: 480px) {
    .tasks-overview-grid {
        grid-template-columns: 1fr;
    }
}