/**
 * Sidebar Navigation Component
 * Modern responsive sidebar with icons, labels, hover effects, and smooth transitions
 */

/* ========================================
   Sidebar Layout Variables
   ======================================== */
:root {
    --sidebar-width: 260px;
    --sidebar-collapsed-width: 72px;
    --sidebar-transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --sidebar-bg: var(--card-background);
    --sidebar-border: var(--border);
    --sidebar-shadow: 0 4px 24px rgba(0, 0, 0, 0.08);
    --nav-item-radius: 12px;
    --nav-item-padding: 12px 16px;
    --nav-icon-size: 22px;
}

/* ========================================
   App Layout with Sidebar
   ======================================== */
.app-layout {
    display: flex;
    width: 100%;
    height: 100%;
    overflow: hidden;
}

/* ========================================
   Sidebar Container
   ======================================== */
.sidebar {
    position: fixed;
    left: 0;
    top: 0;
    width: var(--sidebar-width);
    height: 100vh;
    background: var(--sidebar-bg);
    background: color-mix(in srgb, var(--sidebar-bg) 85%, transparent);
    border-right: 1px solid var(--sidebar-border);
    box-shadow: var(--sidebar-shadow);
    display: flex;
    flex-direction: column;
    z-index: 100;
    transition: width var(--sidebar-transition), transform var(--sidebar-transition);
    overflow: hidden;
}

/* Sidebar collapsed state */
.sidebar.collapsed {
    width: var(--sidebar-collapsed-width);
}

.sidebar.collapsed .nav-label,
.sidebar.collapsed .sidebar-header-text,
.sidebar.collapsed .user-details {
    opacity: 0;
    width: 0;
    overflow: hidden;
    white-space: nowrap;
}

.sidebar.collapsed .nav-item {
    justify-content: center;
    padding: 12px;
}

.sidebar.collapsed .sidebar-header {
    justify-content: center;
    padding: 16px 12px;
}

.sidebar.collapsed .user-card {
    justify-content: center;
    padding: 12px;
}

/* ========================================
   Sidebar Header
   ======================================== */
.sidebar-header {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 20px 16px;
    border-bottom: 1px solid var(--sidebar-border);
    flex-shrink: 0;
}

.sidebar-logo {
    width: 40px;
    height: 40px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    background: linear-gradient(135deg, var(--primary-gradient-start), var(--primary-gradient-end));
    box-shadow: 0 4px 12px var(--glow-color, rgba(102, 126, 234, 0.3));
    flex-shrink: 0;
}

.sidebar-header-text {
    display: flex;
    flex-direction: column;
    gap: 2px;
    transition: opacity var(--sidebar-transition), width var(--sidebar-transition);
}

.sidebar-title {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1.2;
}

.sidebar-subtitle {
    font-size: 0.75rem;
    color: var(--text-secondary);
    letter-spacing: 0.02em;
}

/* ========================================
   Navigation Container
   ======================================== */
.sidebar-nav {
    flex: 1;
    overflow-y: auto;
    overflow-x: hidden;
    padding: 12px 8px;
    scrollbar-width: thin;
    scrollbar-color: var(--border) transparent;
}

.sidebar-nav::-webkit-scrollbar {
    width: 4px;
}

.sidebar-nav::-webkit-scrollbar-track {
    background: transparent;
}

.sidebar-nav::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 4px;
}

/* Nav Section Groups */
.nav-section {
    margin-bottom: 16px;
}

.nav-section-title {
    font-size: 0.65rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--text-light);
    padding: 8px 16px 4px;
    margin-bottom: 4px;
}

.sidebar.collapsed .nav-section-title {
    opacity: 0;
    height: 0;
    padding: 0;
    margin: 0;
    overflow: hidden;
}

/* ========================================
   Navigation Items
   ======================================== */
.nav-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: var(--nav-item-padding);
    margin: 2px 0;
    border-radius: var(--nav-item-radius);
    color: var(--text-secondary);
    text-decoration: none;
    cursor: pointer;
    transition: all 0.2s ease;
    border: none;
    background: transparent;
    width: 100%;
    text-align: left;
    font-size: 0.9rem;
    font-weight: 500;
    position: relative;
    overflow: hidden;
}

/* Hover effect */
.nav-item:hover {
    background: var(--accent-light);
    color: var(--accent);
    transform: translateX(4px);
}

.sidebar.collapsed .nav-item:hover {
    transform: none;
}

/* Active state */
.nav-item.active {
    background: var(--accent);
    color: white;
    font-weight: 600;
    box-shadow: 0 4px 12px var(--glow-color, rgba(102, 126, 234, 0.3));
}

.nav-item.active:hover {
    background: var(--primary-button-hover);
    color: white;
    transform: none;
}

.nav-item.is-disabled {
    opacity: 0.6;
    cursor: not-allowed;
    pointer-events: none;
}

/* Nav Icon */
.nav-icon {
    width: var(--nav-icon-size);
    height: var(--nav-icon-size);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    font-size: 1.1rem;
}

.nav-icon svg {
    width: 100%;
    height: 100%;
    stroke: currentColor;
    stroke-width: 2;
    fill: none;
}

/* Nav Label */
.nav-label {
    flex: 1;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    transition: opacity var(--sidebar-transition), width var(--sidebar-transition);
}

/* Nav Badge */
.nav-badge {
    background: var(--error);
    color: white;
    font-size: 0.65rem;
    font-weight: 700;
    padding: 2px 6px;
    border-radius: 10px;
    min-width: 18px;
    text-align: center;
    line-height: 1.2;
}

.nav-status {
    font-size: 0.65rem;
    font-weight: 600;
    padding: 2px 8px;
    border-radius: 999px;
    background: color-mix(in srgb, var(--accent) 15%, transparent);
    color: var(--text-secondary);
    white-space: nowrap;
}

.nav-status.logged-in {
    background: color-mix(in srgb, var(--success) 20%, transparent);
    color: var(--success);
}

.nav-status.live {
    background: color-mix(in srgb, var(--error) 20%, transparent);
    color: var(--error);
    animation: navStatusPulse 2s ease-in-out infinite;
}

@keyframes navStatusPulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.sidebar.collapsed .nav-badge {
    position: absolute;
    top: 6px;
    right: 6px;
    padding: 2px 4px;
    min-width: 16px;
    font-size: 0.6rem;
}

/* ========================================
   Sidebar Footer
   ======================================== */
.sidebar-footer {
    border-top: 1px solid var(--sidebar-border);
    padding: 12px 8px;
    flex-shrink: 0;
}

.sidebar-app-version {
    font-size: 0.72rem;
    color: var(--text-light);
    letter-spacing: 0.02em;
    text-align: center;
    margin: 0 0 8px;
    min-height: 1em;
}

.sidebar.collapsed .sidebar-app-version {
    display: none;
}

/* User Card */
.user-card {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px;
    border-radius: var(--nav-item-radius);
    background: var(--accent-light);
    cursor: pointer;
    transition: all 0.2s ease;
}

.user-card:hover {
    background: var(--border);
}

.user-avatar-sidebar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    flex-shrink: 0;
    border: 2px solid var(--accent);
    object-fit: cover;
}

.user-details {
    flex: 1;
    min-width: 0;
    transition: opacity var(--sidebar-transition), width var(--sidebar-transition);
}

.user-name {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.user-status {
    font-size: 0.7rem;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: 4px;
}

.status-indicator {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--success);
}

/* ========================================
   Sidebar Toggle Button
   ======================================== */
.sidebar-toggle {
    position: absolute;
    top: 20px;
    right: -14px;
    width: 28px;
    height: 28px;
    background: var(--card-background);
    border: 1px solid var(--border);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.2s ease;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    z-index: 10;
}

.sidebar-toggle:hover {
    background: var(--accent);
    color: white;
    border-color: var(--accent);
    transform: scale(1.1);
}

.sidebar-toggle svg {
    width: 14px;
    height: 14px;
    transition: transform 0.3s ease;
    transform-origin: center;
    display: block;
}

.sidebar.collapsed .sidebar-toggle svg {
    transform: rotate(180deg);
}

/* ========================================
   Main Content Area (with sidebar offset)
   ======================================== */
.main-area {
    flex: 1;
    margin-left: var(--sidebar-width);
    width: calc(100% - var(--sidebar-width));
    height: 100vh;
    overflow: hidden;
    transition: margin-left var(--sidebar-transition), width var(--sidebar-transition);
}

body.performance-active .sidebar {
    display: none;
}

body.performance-active .main-area {
    margin-left: 0;
    width: 100%;
}

.sidebar.collapsed ~ .main-area {
    margin-left: var(--sidebar-collapsed-width);
    width: calc(100% - var(--sidebar-collapsed-width));
}

/* ========================================
   Animations
   ======================================== */
@keyframes slideInLeft {
    from {
        transform: translateX(-100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.nav-item {
    animation: fadeIn 0.3s ease forwards;
}

.nav-section:nth-child(1) .nav-item { animation-delay: 0.05s; }
.nav-section:nth-child(2) .nav-item { animation-delay: 0.1s; }
.nav-section:nth-child(3) .nav-item { animation-delay: 0.15s; }

/* ========================================
   Special Nav Item Styles
   ======================================== */
.nav-item.premium {
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.1), rgba(118, 75, 162, 0.1));
    border: 1px solid rgba(102, 126, 234, 0.2);
}

.nav-item.premium:hover {
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.2), rgba(118, 75, 162, 0.2));
    border-color: var(--accent);
}

.nav-item.patreon-subscribe {
    color: #ffffff;
    background: linear-gradient(135deg, var(--primary-gradient-start), var(--primary-gradient-end));
    border: 1px solid color-mix(in srgb, var(--primary-gradient-end) 60%, transparent);
    box-shadow: 0 6px 16px rgba(0, 0, 0, 0.12);
}

.nav-item.patreon-subscribe:hover {
    color: #ffffff;
    background: linear-gradient(135deg, var(--primary-gradient-end), var(--primary-gradient-start));
    transform: translateX(4px);
}

.nav-item.danger {
    color: var(--error);
}

.nav-item.danger:hover {
    background: rgba(231, 76, 60, 0.1);
}

/* Divider */
.nav-divider {
    height: 1px;
    background: var(--border);
    margin: 12px 16px;
}