/* ============================================
   LAYOUT
   Page headers, management container/section,
   section headers, search box
   ============================================ */

/* === Page Headers === */

.page-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-5);
    padding-bottom: var(--space-4);
    border-bottom: 1px solid var(--border);
    gap: var(--space-5);
    flex-wrap: wrap;
}

.page-header-group {
    display: flex;
    align-items: flex-start;
    gap: var(--space-4);
}

.page-header-group:not(:has(.page-header-subtitle)) {
    align-items: center;
}

.page-header-icon {
    width: calc(52px * var(--space-scale));
    height: calc(52px * var(--space-scale));
    background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary-color) 100%);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 12px var(--black-10);
    flex-shrink: 0;
    color: white;
}

.page-header-icon svg {
    width: var(--icon-xl);
    height: var(--icon-xl);
    stroke: white;
    stroke-width: 2;
}

.page-header-title {
    font-size: var(--text-2xl);
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: -0.02em;
    margin: 0;
}

.page-header-prefix {
    font-weight: 700;
    color: var(--text-primary);
}

.page-header-separator {
    margin: 0 var(--space-2);
    color: var(--text-light);
    font-weight: 300;
}

.page-header-name {
    font-weight: 600;
    color: var(--primary-dark);
}

.page-header-subtitle {
    font-size: var(--text-sm);
    color: var(--text-secondary);
    margin-top: var(--space-1);
}

.page-header-meta {
    margin-top: var(--space-2);
}

.page-header-actions {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    flex-shrink: 0;
}

.page-header-actions .btn {
    padding: var(--space-2) var(--space-3);
    font-size: var(--text-sm);
}

/* --- Icon Button (standalone action button with icon only) --- */

.icon-btn {
    position: relative;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: calc(38px * var(--space-scale));
    height: calc(38px * var(--space-scale));
    border-radius: var(--radius-full);
    border: 1px solid var(--border);
    background: var(--surface);
    color: var(--text-secondary);
    box-shadow: var(--shadow-sm);
    text-decoration: none;
    transition: background 0.15s ease, border-color 0.15s ease, box-shadow 0.15s ease, transform 0.15s ease, color 0.15s ease;
}

.icon-btn svg {
    width: var(--icon-sm);
    height: var(--icon-sm);
    stroke-width: 1.8;
}

.icon-btn:hover {
    background: var(--background-secondary);
    border-color: var(--primary-color);
    color: var(--primary-dark);
    box-shadow: var(--shadow-md);
    transform: translateY(-1px);
}

.icon-btn:active {
    transform: translateY(0);
    box-shadow: var(--shadow-sm);
}

.icon-btn--badge .icon-badge {
    position: absolute;
    top: calc(-4px * var(--space-scale));
    inset-inline-end: calc(-4px * var(--space-scale));
    min-width: var(--icon-sm);
    height: var(--icon-sm);
    padding: 0 var(--space-1);
    border-radius: var(--radius-full);
    background: var(--accent);
    color: #fff;
    font-size: var(--text-xs);
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 0 0 2px var(--surface);
}

/* --- Back Button --- */

.back-btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-3);
    background: var(--surface);
    color: var(--text-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    font-size: var(--text-sm);
    font-weight: 500;
    text-decoration: none;
    transition: all 0.2s ease;
    font-family: inherit;
    box-shadow: var(--shadow-sm);
}

.back-btn:hover {
    background: var(--background-secondary);
    color: var(--text-primary);
    border-color: var(--primary-color);
    transform: translateX(-2px);
}

.back-btn svg {
    width: var(--icon-sm);
    height: var(--icon-sm);
    transition: transform 0.2s ease;
}

/* === Management Container === */

.management-container {
    max-width: 1600px;
    width: 100%;
    margin: 0 auto;
    padding: var(--space-5) var(--space-10);
    box-sizing: border-box;
}

/* === Management Section === */

.management-section {
    background: var(--surface);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
    padding: var(--space-6);
    width: 100%;
    box-sizing: border-box;
}

.management-section + .management-section {
    margin-top: var(--space-5);
}

/* === Section Headers === */

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-5);
    gap: var(--space-5);
    flex-wrap: wrap;
}

.section-title {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    font-size: var(--text-xl);
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
}

.section-title .icon {
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary-color);
}

.section-title .icon svg {
    width: var(--icon-md);
    height: var(--icon-md);
    flex-shrink: 0;
}

.section-title .count-badge {
    margin-inline-start: auto;
}

/* === Search Box === */

.search-box {
    position: relative;
}

.section-header > .search-box,
.section-header-actions > .search-box {
    width: 280px;
    flex-shrink: 0;
}

.section-header-actions {
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

.search-input {
    width: 100%;
    height: var(--space-10);
    padding: 0;
    padding-inline: var(--space-11) var(--space-4);
    border: 1.5px solid var(--border);
    border-radius: var(--radius-sm);
    transition: all 0.2s;
    background: var(--surface);
    color: var(--text-primary);
    font-family: inherit;
    font-size: var(--text-sm);
}

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

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

.search-icon {
    position: absolute;
    inset-inline-start: var(--space-3);
    top: 50%;
    transform: translateY(-50%);
    display: flex;
    align-items: center;
    color: var(--text-secondary);
    opacity: 0.6;
    pointer-events: none;
}

.search-icon svg {
    width: var(--icon-sm);
    height: var(--icon-sm);
}

/* === Filters Section === */

.filters-section {
    background: var(--surface);
    padding: var(--space-3) var(--space-5);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
    margin-bottom: var(--space-5);
}

.filters-form {
    display: grid;
    gap: var(--space-3);
    align-items: end;
}

/* === Advanced Filters === */

.advanced-filters-wrapper {
    grid-column: 1 / -1;
}

.advanced-filters-toggle-group {
    display: flex;
    flex-direction: column;
    position: relative;
    gap: 0;
}

.advanced-filters-toggle {
    width: 100%;
    height: var(--space-10);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    position: relative;
    padding: 0 var(--space-5);
    border-width: 1.5px;
    border-radius: var(--radius-sm);
    background: var(--surface);
    transition: border-radius 0.3s ease, border 0.3s ease, background 0.3s ease;
    z-index: 1;
    margin: 0;
}

.advanced-filters-toggle.active {
    border-bottom-left-radius: 0;
    border-bottom-right-radius: 0;
    border-bottom: none;
    background: var(--surface);
}

.advanced-filters-wrapper:hover .advanced-filters-toggle.active {
    border-color: var(--primary-color);
    background: var(--background-secondary);
}

.advanced-filters-wrapper:hover .advanced-filters-container.active {
    border-left-color: var(--primary-color);
    border-right-color: var(--primary-color);
    border-bottom-color: var(--primary-color);
    background: var(--background-secondary);
}

.advanced-filters-toggle:active:not(:disabled) {
    transform: none !important;
}

.advanced-filters-toggle .toggle-arrow {
    width: 18px;
    height: 18px;
    stroke-width: 2;
    margin-inline-start: auto;
    transition: transform 0.3s ease;
}

.advanced-filters-toggle.active .toggle-arrow {
    transform: rotate(180deg);
}

.advanced-filters-container {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-3);
    overflow: hidden;
    max-height: 0;
    opacity: 0;
    padding: 0 var(--space-4);
    background: var(--surface);
    border-left: 0px solid var(--border);
    border-right: 0px solid var(--border);
    border-bottom: 0px solid var(--border);
    border-bottom-left-radius: var(--radius-sm);
    border-bottom-right-radius: var(--radius-sm);
    transition: max-height 0.35s ease, opacity 0.25s ease, padding 0.3s ease,
                border-width 0.3s ease, border-color 0.3s ease, background 0.3s ease;
}

.advanced-filters-container.active {
    max-height: 500px;
    opacity: 1;
    padding: var(--space-3) var(--space-4);
    border-left-width: 1.5px;
    border-right-width: 1.5px;
    border-bottom-width: 1.5px;
    overflow: visible;
}

.advanced-filters-container > .filter-group:first-child {
    margin-top: 0;
}

.advanced-filters-container.active .filter-group {
    overflow: visible;
}

/* === Responsive === */

@media (max-width: 1024px) {
    .management-container {
        padding: var(--space-5);
    }

    .page-header {
        flex-direction: column;
        align-items: stretch;
        gap: var(--space-4);
    }

    .page-header-actions {
        flex-wrap: wrap;
        justify-content: flex-start;
    }

    .section-header {
        flex-direction: column;
        align-items: stretch;
        gap: var(--space-4);
    }
}

@media (max-width: 768px) {
    .management-container {
        padding: var(--space-4);
    }

    .page-header {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--space-4);
        padding-bottom: var(--space-4);
    }

    .page-header h1,
    .page-header-title {
        font-size: var(--text-xl);
    }

    .page-header-icon {
        display: none;
    }

    .page-header-actions {
        width: 100%;
        justify-content: flex-start;
    }

    .back-btn:hover {
        transform: none;
    }
}