/**
 * ArcEdgeVPN Layout & Responsive Architecture
 */

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

/* Sidebar */
.app-sidebar {
    width: var(--sidebar-width);
    background-color: var(--bg-sidebar);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 0;
    bottom: 0;
    left: 0;
    z-index: 100;
    transition: transform var(--transition-normal), width var(--transition-normal);
}

.sidebar-header {
    height: var(--topbar-height);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 20px;
    border-bottom: 1px solid var(--border-color);
}

.brand-link {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
    color: var(--text-primary);
}

.brand-icon {
    display: flex;
    align-items: center;
    justify-content: center;
}

.brand-text {
    display: flex;
    flex-direction: column;
}

.brand-name {
    font-family: var(--font-heading);
    font-size: 1.15rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    color: var(--text-primary);
}

.brand-name span {
    color: var(--accent-primary);
}

.brand-tag {
    font-size: 0.68rem;
    font-weight: 600;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--text-muted);
}

/* Sidebar Navigation Items */
.sidebar-nav {
    flex: 1;
    overflow-y: auto;
    padding: 16px 12px;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.nav-section-title {
    font-size: 0.68rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    color: var(--text-muted);
    padding: 14px 12px 6px;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 14px;
    border-radius: var(--radius-md);
    text-decoration: none;
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 0.9rem;
    transition: background-color var(--transition-fast), color var(--transition-fast), transform var(--transition-fast);
}

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

.nav-item.active {
    background-color: var(--accent-subtle);
    color: var(--accent-primary);
    font-weight: 600;
}

.nav-item.active .nav-icon {
    stroke: var(--accent-primary);
}

.nav-icon {
    stroke: var(--text-muted);
    transition: stroke var(--transition-fast);
}

.nav-label {
    flex: 1;
}

.nav-pill {
    background-color: var(--accent-primary);
    color: #ffffff;
    font-size: 0.72rem;
    font-weight: 700;
    padding: 2px 8px;
    border-radius: 9999px;
}

/* Sidebar Footer */
.sidebar-footer {
    padding: 16px;
    border-top: 1px solid var(--border-color);
}

.session-timer-box {
    display: flex;
    align-items: center;
    gap: 8px;
    background-color: var(--bg-subtle);
    padding: 8px 12px;
    border-radius: var(--radius-md);
    font-size: 0.78rem;
    color: var(--text-secondary);
}

.session-timer-box svg {
    color: var(--accent-primary);
}

.session-timer-box strong {
    font-family: var(--font-numbers);
    color: var(--text-primary);
}

/* Main Content Wrapper */
.app-main {
    flex: 1;
    margin-left: var(--sidebar-width);
    display: flex;
    flex-direction: column;
    min-width: 0;
    transition: margin-left var(--transition-normal);
}

/* Topbar */
.app-topbar {
    height: var(--topbar-height);
    background-color: var(--bg-topbar);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 90;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 28px;
}

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

.page-title-box {
    display: flex;
    flex-direction: column;
}

.page-title {
    font-family: var(--font-heading);
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1.2;
}

.page-subtitle {
    font-size: 0.78rem;
    color: var(--text-muted);
}

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

/* Status Indicator Badge */
.status-indicator {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 6px 12px;
    border-radius: 9999px;
    font-size: 0.78rem;
    font-weight: 600;
    border: 1px solid transparent;
}

.status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
}

.status-online {
    background-color: var(--status-success-bg);
    border-color: rgba(16, 185, 129, 0.25);
    color: var(--status-success);
}
.status-online .status-dot {
    background-color: var(--status-success);
    box-shadow: 0 0 8px var(--status-success);
}

.status-disconnected, .status-error {
    background-color: var(--status-danger-bg);
    border-color: rgba(239, 68, 68, 0.25);
    color: var(--status-danger);
}
.status-disconnected .status-dot, .status-error .status-dot {
    background-color: var(--status-danger);
}

.status-unknown {
    background-color: var(--status-warning-bg);
    border-color: rgba(245, 158, 11, 0.25);
    color: var(--status-warning);
}
.status-unknown .status-dot {
    background-color: var(--status-warning);
}

/* Last Sync Counter */
.sync-counter-box {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 0.78rem;
    color: var(--text-muted);
    padding: 6px 10px;
    background-color: var(--bg-subtle);
    border-radius: var(--radius-md);
}

/* Administrator Menu Dropdown */
.user-menu-wrapper {
    position: relative;
}

.user-profile-btn {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 4px 10px 4px 4px;
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 9999px;
    cursor: pointer;
    color: var(--text-primary);
    transition: background-color var(--transition-fast), border-color var(--transition-fast);
}

.user-profile-btn:hover {
    background-color: var(--bg-subtle);
    border-color: var(--border-focus);
}

.avatar-circle {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-hover));
    color: #ffffff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 0.85rem;
}

.user-name {
    font-weight: 600;
    font-size: 0.85rem;
}

.user-dropdown-menu {
    position: absolute;
    right: 0;
    top: calc(100% + 8px);
    width: 200px;
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    padding: 8px;
    z-index: 100;
}

.dropdown-header {
    padding: 8px 12px;
}

.dropdown-user-role {
    font-size: 0.7rem;
    text-transform: uppercase;
    font-weight: 700;
    letter-spacing: 0.05em;
    color: var(--accent-primary);
    display: block;
}

.dropdown-user-email {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-primary);
    display: block;
}

.dropdown-divider {
    height: 1px;
    background-color: var(--border-color);
    margin: 6px 0;
}

.dropdown-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 12px;
    width: 100%;
    border: none;
    background: none;
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.85rem;
    cursor: pointer;
    text-align: left;
    transition: background-color var(--transition-fast), color var(--transition-fast);
}

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

.dropdown-item.text-danger:hover {
    background-color: var(--status-danger-bg);
    color: var(--status-danger);
}

/* App View Container */
.app-content-area {
    padding: 28px;
    max-width: 1600px;
    width: 100%;
    margin: 0 auto;
}

/* Mobile Responsive Adjustments */
.mobile-only {
    display: none;
}

@media (max-width: 1024px) {
    :root {
        --sidebar-width: 240px;
    }
    .app-content-area {
        padding: 20px;
    }
}

@media (max-width: 768px) {
    .mobile-only {
        display: flex;
    }
    .sync-counter-box {
        display: none;
    }
    .app-sidebar {
        transform: translateX(-100%);
    }
    .app-sidebar.sidebar-open {
        transform: translateX(0);
        box-shadow: var(--shadow-lg);
    }
    .app-main {
        margin-left: 0;
    }
    .app-topbar {
        padding: 0 16px;
    }
    .app-content-area {
        padding: 16px;
    }
}