/* ================================================================
   Sidebar Navigation - Deep Indigo Dark Theme
   ================================================================ */

:root {
    /* Override layout dimensions */
    --sidebar-width: 256px;
    --sidebar-collapsed-width: 64px;

    /* Sidebar palette */
    --sb-bg:           #1e2140;
    --sb-bg-deep:      #171a35;
    --sb-bg-hover:     rgba(255, 255, 255, 0.06);
    --sb-bg-active:    rgba(129, 140, 248, 0.18);
    --sb-text:         rgba(255, 255, 255, 0.68);
    --sb-text-hover:   rgba(255, 255, 255, 0.93);
    --sb-text-active:  #c7d2fe;
    --sb-text-muted:   rgba(255, 255, 255, 0.32);
    --sb-accent:       #818cf8;
    --sb-accent-bar:   #6366f1;
    --sb-border:       rgba(255, 255, 255, 0.07);
    --sb-ease:         cubic-bezier(0.4, 0, 0.2, 1);
}

/* ================================================================
   Sidebar Container
   ================================================================ */
.modern-sidebar-2026 {
    position: fixed;
    left: 0;
    top: 0;
    height: 100vh;
    width: var(--sidebar-width);
    background: var(--sb-bg);
    border-right: 1px solid var(--sb-border);
    display: flex;
    flex-direction: column;
    z-index: 1000;
    transition: width 0.28s var(--sb-ease);
    overflow: hidden;
}

.modern-sidebar-2026.collapsed {
    width: var(--sidebar-collapsed-width);
}

/* ================================================================
   Brand / Logo Section (logo + nút toggle bên phải)
   ================================================================ */
.sb-brand {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.5rem;
    padding: 0.75rem;
    background: #ffffff;
    border-bottom: 1px solid rgba(0, 0, 0, 0.08);
    min-height: 56px;
    flex-shrink: 0;
    overflow: hidden;
}

.sb-brand-logo {
    flex: 1;
    min-width: 0;
    max-width: 180px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    flex-shrink: 0;
}

.sb-brand-logo img {
    max-width: 100%;
    max-height: 100%;
    width: auto;
    height: auto;
    object-fit: contain;
}

.sb-brand-toggle {
    width: 36px;
    height: 36px;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    border: none;
    border-radius: 8px;
    background: transparent;
    color: #1e3a5f;
    cursor: pointer;
    transition: background 0.2s, color 0.2s;
}

.sb-brand-toggle:hover {
    background: rgba(30, 58, 95, 0.08);
    color: #1e3a5f;
}

.sb-brand-toggle svg {
    width: 20px;
    height: 20px;
}

.modern-sidebar-2026.collapsed .sb-brand-logo {
    max-width: 44px;
    height: 44px;
}

.modern-sidebar-2026.collapsed .sb-brand-toggle {
    width: 32px;
    height: 32px;
}

.modern-sidebar-2026.collapsed .sb-brand-toggle svg {
    width: 18px;
    height: 18px;
}

/* ================================================================
   Navigation Scroll Area
   ================================================================ */
.sb-nav-wrap {
    flex: 1;
    overflow-y: auto;
    overflow-x: hidden;
    padding: 0.625rem 0.5rem;
}

.sb-nav-wrap::-webkit-scrollbar { width: 3px; }
.sb-nav-wrap::-webkit-scrollbar-track { background: transparent; }
.sb-nav-wrap::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.1);
    border-radius: 2px;
}

.modern-sidebar-2026.collapsed .sb-nav-wrap {
    padding: 0.625rem 0.375rem;
}

/* ================================================================
   Nav items list (inside NavMenu component)
   ================================================================ */
.sb-items {
    display: flex;
    flex-direction: column;
    gap: 1px;
}

/* ================================================================
   Individual Menu Item
   ================================================================ */
.sb-item-wrap {
    position: relative;
}

/* Shared style for link and button */
.sb-link {
    display: flex;
    align-items: center;
    gap: 0.7rem;
    padding: 0.6rem 0.75rem;
    border-radius: 8px;
    color: var(--sb-text);
    text-decoration: none;
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    border: none;
    background: transparent;
    width: 100%;
    text-align: left;
    transition: background 0.18s var(--sb-ease), color 0.18s var(--sb-ease);
    position: relative;
    white-space: nowrap;
    overflow: hidden;
    line-height: 1.4;
}

.sb-link:hover {
    background: var(--sb-bg-hover);
    color: var(--sb-text-hover);
}

.sb-link.active {
    background: var(--sb-bg-active);
    color: var(--sb-text-active);
    font-weight: 600;
}

/* Active left bar indicator */
.sb-link.active::before {
    content: '';
    position: absolute;
    left: 0;
    top: 18%;
    height: 64%;
    width: 3px;
    background: linear-gradient(180deg, var(--sb-accent) 0%, var(--sb-accent-bar) 100%);
    border-radius: 0 3px 3px 0;
}

/* ================================================================
   Icon
   ================================================================ */
.sb-icon {
    width: 20px;
    height: 20px;
    min-width: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0.7;
    transition: opacity 0.18s ease, transform 0.18s ease;
    flex-shrink: 0;
}

.sb-icon svg { width: 18px; height: 18px; }

.sb-link:hover .sb-icon  { opacity: 1; }
.sb-link.active .sb-icon { opacity: 1; }

/* ================================================================
   Label
   ================================================================ */
.sb-label {
    flex: 1;
    overflow: hidden;
    text-overflow: ellipsis;
    transition: opacity 0.2s var(--sb-ease), width 0.2s var(--sb-ease);
}

/* ================================================================
   Chevron
   ================================================================ */
.sb-chevron {
    width: 16px;
    height: 16px;
    min-width: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0.4;
    transition: transform 0.2s var(--sb-ease), opacity 0.2s ease;
    flex-shrink: 0;
}

.sb-chevron svg { width: 13px; height: 13px; }

.sb-item-wrap.expanded .sb-chevron {
    transform: rotate(180deg);
    opacity: 0.7;
}

/* ================================================================
   Submenu
   ================================================================ */
.sb-submenu {
    margin-top: 1px;
    padding-left: 1.625rem;
    display: none;
    flex-direction: column;
    gap: 1px;
}

.sb-submenu.open { display: flex; }

.sb-sublink {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    padding: 0.5rem 0.6875rem;
    border-radius: 7px;
    color: var(--sb-text);
    text-decoration: none;
    font-size: 0.8125rem;
    font-weight: 500;
    transition: background 0.18s var(--sb-ease), color 0.18s var(--sb-ease);
    position: relative;
    white-space: nowrap;
    overflow: hidden;
}

.sb-sublink:hover {
    background: var(--sb-bg-hover);
    color: var(--sb-text-hover);
}

.sb-sublink.active {
    background: rgba(99, 102, 241, 0.13);
    color: var(--sb-text-active);
    font-weight: 600;
}

.sb-sublink.active::before {
    content: '';
    position: absolute;
    left: 0;
    top: 20%;
    height: 60%;
    width: 2px;
    background: var(--sb-accent);
    border-radius: 0 2px 2px 0;
}

.sb-sub-icon {
    width: 16px;
    height: 16px;
    min-width: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0.6;
    flex-shrink: 0;
}

.sb-sub-icon svg { width: 14px; height: 14px; }

.sb-sublink:hover .sb-sub-icon,
.sb-sublink.active .sb-sub-icon { opacity: 1; }

.sb-sublabel {
    flex: 1;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* ================================================================
   Profile / Footer
   ================================================================ */
.sb-footer {
    padding: 0.625rem 0.5rem;
    background: var(--sb-bg-deep);
    border-top: 1px solid var(--sb-border);
    flex-shrink: 0;
}

.sb-profile {
    display: flex;
    align-items: center;
    gap: 0.625rem;
    padding: 0.5rem 0.5rem;
    border-radius: 9px;
    overflow: hidden;
    transition: background 0.18s ease;
}

.sb-profile:hover { background: rgba(255, 255, 255, 0.04); }

.sb-avatar {
    width: 34px;
    height: 34px;
    min-width: 34px;
    border-radius: 9px;
    background: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 0.75rem;
    font-weight: 700;
    box-shadow: 0 2px 8px rgba(99, 102, 241, 0.38);
    flex-shrink: 0;
    letter-spacing: 0.02em;
}

.sb-user-info {
    flex: 1;
    min-width: 0;
    overflow: hidden;
    transition: opacity 0.2s var(--sb-ease), width 0.2s var(--sb-ease);
}

.sb-user-name {
    display: block;
    font-size: 0.8125rem;
    font-weight: 600;
    color: rgba(255, 255, 255, 0.88);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    line-height: 1.3;
}

.sb-user-role {
    display: block;
    font-size: 0.6875rem;
    color: var(--sb-text-muted);
    white-space: nowrap;
    margin-top: 1px;
}

.sb-logout-form {
    flex-shrink: 0;
    transition: opacity 0.2s var(--sb-ease), width 0.2s var(--sb-ease);
}

.sb-logout-btn {
    width: 30px;
    height: 30px;
    background: rgba(239, 68, 68, 0.1);
    border: none;
    border-radius: 8px;
    color: rgba(252, 165, 165, 0.85);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.18s ease;
}

.sb-logout-btn:hover {
    background: rgba(239, 68, 68, 0.22);
    color: #fca5a5;
    transform: scale(1.08);
}

.sb-logout-btn svg { width: 15px; height: 15px; }

/* Login link (unauthenticated) */
.sb-login-link {
    display: flex;
    align-items: center;
    gap: 0.7rem;
    padding: 0.6rem 0.75rem;
    border-radius: 8px;
    color: var(--sb-text);
    text-decoration: none;
    font-size: 0.875rem;
    font-weight: 500;
    transition: background 0.18s ease, color 0.18s ease;
}

.sb-login-link:hover {
    background: var(--sb-bg-hover);
    color: var(--sb-text-hover);
}

/* ================================================================
   Collapsed State
   ================================================================ */
.modern-sidebar-2026.collapsed .sb-label,
.modern-sidebar-2026.collapsed .sb-chevron {
    opacity: 0;
    width: 0;
    overflow: hidden;
}

.modern-sidebar-2026.collapsed .sb-link {
    padding: 0.6rem;
    justify-content: center;
}

.modern-sidebar-2026.collapsed .sb-link::before {
    display: none;
}

.modern-sidebar-2026.collapsed .sb-submenu {
    display: none !important;
}

/* Collapsed footer - hide text */
.modern-sidebar-2026.collapsed .sb-user-info,
.modern-sidebar-2026.collapsed .sb-logout-form {
    opacity: 0;
    width: 0;
    overflow: hidden;
}

.modern-sidebar-2026.collapsed .sb-footer {
    padding: 0.625rem 0.375rem;
}

.modern-sidebar-2026.collapsed .sb-profile {
    padding: 0.5rem;
    justify-content: center;
}

/* ================================================================
   Tooltip (collapsed mode)
   ================================================================ */
.sb-tooltip {
    display: none;
    pointer-events: none;
}

.modern-sidebar-2026.collapsed .sb-link:hover > .sb-tooltip,
.modern-sidebar-2026.collapsed .sb-sublink:hover > .sb-tooltip {
    display: block;
    position: absolute;
    left: calc(100% + 10px);
    top: 50%;
    transform: translateY(-50%);
    background: #1e293b;
    color: rgba(255, 255, 255, 0.92);
    font-size: 0.8125rem;
    font-weight: 500;
    padding: 0.375rem 0.75rem;
    border-radius: 7px;
    white-space: nowrap;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.3);
    z-index: 1100;
    border: 1px solid rgba(255, 255, 255, 0.06);
}

/* ================================================================
   Loading & Empty
   ================================================================ */
.sb-loading {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.75rem;
    padding: 2rem 1rem;
    color: var(--sb-text-muted);
    font-size: 0.8125rem;
}

.sb-spinner {
    width: 22px;
    height: 22px;
    border: 2px solid rgba(129, 140, 248, 0.2);
    border-top-color: var(--sb-accent);
    border-radius: 50%;
    animation: sb-spin 0.7s linear infinite;
}

@keyframes sb-spin { to { transform: rotate(360deg); } }

.sb-empty {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    padding: 2rem 1rem;
    color: var(--sb-text-muted);
    font-size: 0.8125rem;
    text-align: center;
}

/* ================================================================
   Top Header (override app.css)
   ================================================================ */
.top-header-modern {
    background: #ffffff !important;
    height: 52px !important;
    min-height: 52px !important;
    border-bottom: 1px solid #f0f4f8 !important;
    display: flex !important;
    align-items: center !important;
    padding: 0 1.25rem !important;
    gap: 0 !important;
    position: sticky !important;
    top: 0 !important;
    z-index: 100 !important;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04) !important;
}

.header-hamburger {
    width: 36px !important;
    height: 36px !important;
    min-width: 36px !important;
    border: none !important;
    background: transparent !important;
    border-radius: 8px !important;
    color: #64748b !important;
    cursor: pointer !important;
    display: flex !important;
    align-items: center !important;
    justify-content: center !important;
    transition: all 0.15s ease !important;
    flex-shrink: 0 !important;
}

.header-hamburger:hover {
    background: #f1f5f9 !important;
    color: #334155 !important;
}

.header-hamburger svg {
    width: 20px !important;
    height: 20px !important;
}

/* ================================================================
   Layout: sync main-content margins with sidebar width
   ================================================================ */
.main-content {
    margin-left: var(--sidebar-width) !important;
    transition: margin-left 0.28s var(--sb-ease) !important;
}

.app-layout.sidebar-collapsed .main-content {
    margin-left: var(--sidebar-collapsed-width) !important;
}

/* ================================================================
   Responsive
   ================================================================ */
@media (max-width: 768px) {
    .modern-sidebar-2026 {
        transform: translateX(-100%);
        transition: transform 0.28s var(--sb-ease), width 0.28s var(--sb-ease);
    }

    .modern-sidebar-2026.mobile-open {
        transform: translateX(0);
    }

    .main-content {
        margin-left: 0 !important;
    }
}