/* ══════════════════════════════════════════
   LAYOUT — Sidebar, header, page layout
   ══════════════════════════════════════════ */

/* === App Shell === */
.app-layout {
    display: flex;
    min-height: 100vh;
    background: var(--bg-body);
}

.main-wrapper {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-width: 0;
    margin-left: var(--sidebar-width);
    transition: margin-left var(--duration-slow) var(--ease-out);
}

.sidebar-is-collapsed .main-wrapper {
    margin-left: var(--sidebar-collapsed);
}

/* === Sidebar === */
.sidebar {
    position: fixed;
    top: 0;
    left: 0;
    width: var(--sidebar-width);
    height: 100vh;
    background: rgba(12, 16, 33, 0.45);
    backdrop-filter: var(--backdrop-blur);
    -webkit-backdrop-filter: var(--backdrop-blur);
    border-right: 1px solid rgba(255, 255, 255, 0.05);
    display: flex;
    flex-direction: column;
    z-index: var(--z-sidebar);
    transition: width var(--duration-slow) var(--ease-out),
        transform var(--duration-slow) var(--ease-out);
    overflow: hidden;
}

.sidebar-is-collapsed .sidebar {
    width: var(--sidebar-collapsed);
}

.sidebar__logo {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 20px;
    height: var(--header-height);
    border-bottom: 1px solid var(--border-subtle);
    flex-shrink: 0;
    overflow: hidden;
}

.sidebar__logo-icon {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 22px;
    flex-shrink: 0;
}

.sidebar__logo-text {
    font-size: var(--text-lg);
    font-weight: 800;
    background: linear-gradient(135deg, var(--accent), #a78bfa);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    white-space: nowrap;
    opacity: 1;
    transition: opacity var(--duration-normal) var(--ease-out);
}

.sidebar-is-collapsed .sidebar__logo-text {
    opacity: 0;
    width: 0;
}

.sidebar__nav {
    flex: 1;
    padding: 12px 8px;
    overflow-y: auto;
    overflow-x: hidden;
}

.sidebar__nav-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 12px;
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    transition: var(--transition-all);
    position: relative;
    white-space: nowrap;
    text-decoration: none;
    margin-bottom: 2px;
}

.sidebar__nav-item:hover {
    color: var(--text-primary);
    background: var(--bg-hover);
}

.sidebar__nav-item.active {
    color: var(--accent);
    background: var(--accent-subtle);
}

.sidebar__nav-item.active::before {
    content: '';
    position: absolute;
    left: -8px;
    top: 50%;
    transform: translateY(-50%);
    width: 3px;
    height: 24px;
    background: var(--accent);
    border-radius: 0 3px 3px 0;
}

.sidebar__nav-icon {
    width: 20px;
    height: 20px;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
}

.sidebar__nav-icon svg {
    width: 20px;
    height: 20px;
    stroke: currentColor;
    fill: none;
    stroke-width: 2;
    stroke-linecap: round;
    stroke-linejoin: round;
}

.sidebar__nav-label {
    opacity: 1;
    transition: opacity var(--duration-normal) var(--ease-out);
}

.sidebar-is-collapsed .sidebar__nav-label {
    opacity: 0;
    width: 0;
    overflow: hidden;
}

.sidebar__divider {
    border-top: 1px solid var(--border-subtle);
    margin: 8px 16px;
}

.sidebar__footer {
    padding: 8px;
    border-top: 1px solid var(--border-subtle);
    flex-shrink: 0;
}

.sidebar__toggle {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 12px;
    border-radius: var(--radius-md);
    color: var(--text-tertiary);
    cursor: pointer;
    border: none;
    background: none;
    width: 100%;
    text-align: left;
    transition: var(--transition-colors);
    white-space: nowrap;
}

.sidebar__toggle:hover {
    color: var(--text-primary);
    background: var(--bg-hover);
}

.sidebar__toggle-icon {
    width: 20px;
    height: 20px;
    flex-shrink: 0;
    transition: transform var(--duration-normal) var(--ease-out);
}

.sidebar__toggle-icon svg {
    width: 20px;
    height: 20px;
    stroke: currentColor;
    fill: none;
    stroke-width: 2;
    stroke-linecap: round;
    stroke-linejoin: round;
}

.sidebar-is-collapsed .sidebar__toggle-icon {
    transform: rotate(180deg);
}

.sidebar-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: calc(var(--z-sidebar) - 1);
    pointer-events: none;
}

/* Tooltip для свёрнутого sidebar */
.sidebar-is-collapsed .sidebar__nav-item {
    position: relative;
}

.sidebar-is-collapsed .sidebar__nav-item::after {
    content: attr(data-tooltip);
    position: absolute;
    left: calc(100% + 12px);
    top: 50%;
    transform: translateY(-50%);
    padding: 4px 10px;
    background: var(--bg-surface-raised);
    color: var(--text-primary);
    border: 1px solid var(--border-default);
    border-radius: var(--radius-sm);
    font-size: var(--text-sm);
    white-space: nowrap;
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--duration-fast) var(--ease-out);
    z-index: var(--z-tooltip);
    box-shadow: var(--shadow-md);
}

.sidebar-is-collapsed .sidebar__nav-item:hover::after {
    opacity: 1;
}

/* === Header === */
.header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: var(--header-height);
    padding: 0 var(--page-padding);
    background: rgba(12, 16, 33, 0.35);
    backdrop-filter: var(--backdrop-blur);
    -webkit-backdrop-filter: var(--backdrop-blur);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    position: sticky;
    top: 0;
    z-index: var(--z-sticky);
    flex-shrink: 0;
}

.header__left {
    display: flex;
    align-items: center;
    gap: 16px;
}

.header__hamburger {
    display: none;
    width: 40px;
    height: 40px;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-md);
    cursor: pointer;
    border: none;
    background: none;
    color: var(--text-secondary);
    transition: var(--transition-colors);
}

.header__hamburger:hover {
    color: var(--text-primary);
    background: var(--bg-hover);
}

.header__hamburger svg {
    width: 24px;
    height: 24px;
    stroke: currentColor;
    fill: none;
    stroke-width: 2;
    stroke-linecap: round;
    stroke-linejoin: round;
}

.breadcrumbs {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: var(--text-sm);
    color: var(--text-tertiary);
}

.breadcrumbs a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: var(--transition-colors);
}

.breadcrumbs a:hover {
    color: var(--text-primary);
}

.breadcrumbs__separator {
    color: var(--text-tertiary);
}

.breadcrumbs__current {
    color: var(--text-primary);
    font-weight: 500;
}

.header__right {
    display: flex;
    align-items: center;
    gap: 8px;
}

.header__search-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 14px;
    border-radius: var(--radius-md);
    background: var(--bg-surface-2);
    border: 1px solid var(--border-subtle);
    color: var(--text-tertiary);
    font-size: var(--text-sm);
    cursor: pointer;
    transition: var(--transition-all);
    min-width: 200px;
}

.header__search-btn:hover {
    border-color: var(--border-default);
    color: var(--text-secondary);
}

.header__search-btn svg {
    width: 16px;
    height: 16px;
    stroke: currentColor;
    fill: none;
    stroke-width: 2;
    stroke-linecap: round;
    stroke-linejoin: round;
    flex-shrink: 0;
}

.header__icon-btn {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-md);
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition-all);
}

.header__icon-btn:hover {
    color: var(--text-primary);
    background: var(--bg-hover);
}

.header__icon-btn svg {
    width: 20px;
    height: 20px;
    stroke: currentColor;
    fill: none;
    stroke-width: 2;
    stroke-linecap: round;
    stroke-linejoin: round;
}

/* === Main Content === */
.main-content {
    flex: 1;
    padding: var(--page-padding);
    max-width: var(--content-max-width);
    width: 100%;
    margin: 0 auto;
}

/* === Page Header === */
.page-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    margin-bottom: 24px;
    flex-wrap: wrap;
}

.page-header h1 {
    display: flex;
    align-items: center;
    gap: 10px;
}

.page-header__actions {
    display: flex;
    align-items: center;
    gap: 8px;
}

/* === Grid System === */
.grid {
    display: grid;
    gap: 20px;
}

.grid-2 {
    grid-template-columns: repeat(2, 1fr);
}

.grid-3 {
    grid-template-columns: repeat(3, 1fr);
}

.grid-4 {
    grid-template-columns: repeat(4, 1fr);
}

.grid-5 {
    grid-template-columns: repeat(5, 1fr);
}

.grid-auto {
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
}

.grid-auto-sm {
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
}

.two-columns {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

/* === Bottom Nav (Mobile) === */
.bottom-nav {
    display: none;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: rgba(12, 16, 33, 0.6);
    backdrop-filter: var(--backdrop-blur);
    -webkit-backdrop-filter: var(--backdrop-blur);
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    z-index: var(--z-sticky);
    padding: 4px 0;
    padding-bottom: env(safe-area-inset-bottom, 4px);
}

.bottom-nav__items {
    display: flex;
    justify-content: space-around;
}

.bottom-nav__item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2px;
    padding: 6px 12px;
    font-size: 10px;
    color: var(--text-tertiary);
    text-decoration: none;
    transition: var(--transition-colors);
}

.bottom-nav__item svg {
    width: 22px;
    height: 22px;
    stroke: currentColor;
    fill: none;
    stroke-width: 2;
    stroke-linecap: round;
    stroke-linejoin: round;
}

.bottom-nav__item.active {
    color: var(--accent);
}

/* === Section separator === */
.section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 16px;
}

.section-header h2 {
    font-size: var(--text-xl);
    display: flex;
    align-items: center;
    gap: 8px;
}

.section-header__link {
    font-size: var(--text-sm);
    color: var(--text-link);
    text-decoration: none;
}

.section-header__link:hover {
    color: var(--text-link-hover);
}