/**
 * SysKit.ru Личный Кабинет - Макет и адаптивная сетка
 */

*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 15px;
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: var(--font-sans);
    background-color: var(--bg-body);
    color: var(--text-primary);
    line-height: 1.5;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    overflow-x: hidden;
    transition: background-color var(--transition-base), color var(--transition-base);
}

/* ==========================================================================
   ПЛАШКА ИМПЕРСОНАЦИИ (ADMIN LOGIN-AS-USER)
   ========================================================================== */
.impersonation-banner {
    background: linear-gradient(90deg, #BA4D00, #E53935);
    color: #FFFFFF;
    padding: 8px 16px;
    font-size: 0.9rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    justify-content: space-between;
    z-index: 1000;
    box-shadow: 0 2px 10px rgba(186, 77, 0, 0.4);
}

.impersonation-banner .btn-exit-impersonation {
    background: #FFFFFF;
    color: #BA4D00;
    border: none;
    padding: 4px 12px;
    border-radius: var(--radius-sm);
    font-weight: 700;
    font-size: 0.85rem;
    cursor: pointer;
    transition: transform var(--transition-fast), background var(--transition-fast);
}

.impersonation-banner .btn-exit-impersonation:hover {
    background: #FFF3E0;
    transform: scale(1.03);
}

/* ==========================================================================
   ШАПКА (HEADER)
   ========================================================================== */
.lk-header {
    height: var(--header-height);
    background-color: var(--bg-surface);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 1.25rem;
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(12px);
    transition: background-color var(--transition-base), border-color var(--transition-base);
}

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

.brand-logo,
.header-brand {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    text-decoration: none;
    color: var(--text-primary);
    font-weight: 700;
    font-size: 1.25rem;
    letter-spacing: -0.02em;
    white-space: nowrap;
    font-family: var(--font-sans);
    line-height: 1;
}

.brand-icon {
    width: 32px;
    height: 32px;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    box-shadow: var(--primary-glow);
    flex-shrink: 0;
}

.header-right {
    display: flex;
    align-items: center;
    gap: 12px;
}

.btn-theme-toggle {
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    width: 38px;
    height: 38px;
    border-radius: var(--radius-md);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
}

.btn-theme-toggle:hover {
    background: var(--bg-surface-elevated);
    color: var(--text-primary);
    border-color: var(--border-hover);
}

.btn-menu-toggle {
    display: none;
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    width: 38px;
    height: 38px;
    border-radius: var(--radius-md);
    cursor: pointer;
    align-items: center;
    justify-content: center;
}

/* ==========================================================================
   КОРНЕВАЯ СТРУКТУРА ПРИЛОЖЕНИЯ
   ========================================================================== */
.lk-app-layout {
    display: flex;
    flex: 1;
    min-height: calc(100vh - var(--header-height));
}

/* САЙДБАР */
.lk-sidebar {
    width: var(--sidebar-width);
    background-color: var(--bg-surface);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    padding: 20px 14px;
    gap: 6px;
    flex-shrink: 0;
    transition: background-color var(--transition-base), border-color var(--transition-base);
}

.nav-section-title {
    font-size: 0.72rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    font-weight: 700;
    color: var(--text-muted);
    padding: 10px 12px 4px;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 14px;
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
    cursor: pointer;
    border: 1px solid transparent;
}

.nav-item svg {
    width: 18px;
    height: 18px;
    flex-shrink: 0;
}

.nav-item:hover {
    background-color: var(--bg-surface-elevated);
    color: var(--text-primary);
    border-color: var(--border-card);
}

.nav-item.active {
    background-color: var(--primary-light);
    color: var(--primary);
    border-color: var(--border-hover);
    font-weight: 600;
}

.nav-item .nav-badge {
    margin-left: auto;
    font-size: 0.75rem;
    font-weight: 700;
    background: var(--bg-surface-elevated);
    padding: 2px 8px;
    border-radius: var(--radius-full);
}

.sidebar-user-card {
    margin-top: auto;
    padding: 12px;
    background-color: var(--bg-surface-elevated);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.user-card-header {
    display: flex;
    align-items: center;
    gap: 10px;
}

.user-avatar {
    width: 36px;
    height: 36px;
    border-radius: var(--radius-full);
    background: var(--btn-primary-bg);
    color: #FFFFFF;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 0.95rem;
}

.user-info {
    overflow: hidden;
}

.user-name {
    font-weight: 600;
    font-size: 0.9rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.user-tier-badge {
    display: inline-block;
    font-size: 0.7rem;
    font-weight: 700;
    color: var(--primary);
    background: var(--primary-light);
    padding: 1px 6px;
    border-radius: var(--radius-sm);
    text-transform: uppercase;
}

.user-card-balance {
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 0.85rem;
    color: var(--text-muted);
    border-top: 1px solid var(--border-color);
    padding-top: 8px;
}

.user-card-balance b {
    color: var(--text-primary);
    font-family: var(--font-mono);
}

/* ОСНОВНАЯ ОБЛАСТЬ */
.lk-main {
    flex: 1;
    padding: 28px 36px;
    max-width: 1300px;
    width: 100%;
    margin: 0 auto;
}

/* ОВЕРЛЕЙ ДЛЯ МОБИЛЬНЫХ */
.lk-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(4px);
    z-index: 99;
}

.lk-overlay.show {
    display: block;
}

/* ==========================================================================
   АДАПТИВНОСТЬ (MOBILE-FIRST BREAKPOINTS)
   ========================================================================== */
@media (max-width: 900px) {
    .btn-menu-toggle {
        display: flex;
    }

    .lk-sidebar {
        position: fixed;
        top: 0;
        bottom: 0;
        left: -100%;
        z-index: 105;
        width: 280px;
        box-shadow: var(--shadow-lg);
        transition: left var(--transition-smooth);
    }

    .lk-sidebar.open {
        left: 0;
    }

    .lk-main {
        padding: 20px 16px;
    }
}