/* ═══════════════════════════════════════════════════════════════
   ILLUMINATE AI — Unified Sidebar (Modern 2026)
   Collapsible on desktop, drawer on mobile
   Spring easing, glass reflection, ambient glow
   ═══════════════════════════════════════════════════════════════ */

/* ── Sidebar Container ── */
.sidebar {
    position: fixed;
    left: 0;
    top: 0;
    bottom: 0;
    width: var(--sidebar-width);
    background: var(--bg-card-solid);
    border-right: 1px solid var(--border-light);
    display: flex;
    flex-direction: column;
    z-index: 50;
    transition: width 0.35s cubic-bezier(0.22, 1.2, 0.36, 1),
                transform 0.35s cubic-bezier(0.22, 1.2, 0.36, 1);
    overflow: hidden;
}

/* Glass reflection overlay */
.sidebar::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 200px;
    background: linear-gradient(180deg,
        rgba(92, 98, 252, 0.03) 0%,
        rgba(157, 80, 255, 0.01) 50%,
        transparent 100%);
    pointer-events: none;
    z-index: 1;
}

/* Ambient glow at top-right corner */
.sidebar::after {
    content: '';
    position: absolute;
    top: -50px;
    right: -50px;
    width: 150px;
    height: 150px;
    background: radial-gradient(circle, var(--accent-glow, rgba(92, 98, 252, 0.15)) 0%, transparent 70%);
    pointer-events: none;
    z-index: 0;
    opacity: 0.6;
    animation: sidebar-glow-pulse 4s ease-in-out infinite;
}

@keyframes sidebar-glow-pulse {
    0%, 100% { opacity: 0.4; transform: scale(1); }
    50% { opacity: 0.6; transform: scale(1.1); }
}

/* ── Collapsed State (Desktop) ── */
.sidebar.collapsed {
    width: var(--sidebar-collapsed-width);
}

/* ── Sidebar Header ── */
.sidebar-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-4);
    min-height: 64px;
    border-bottom: 1px solid var(--border-light);
    flex-shrink: 0;
}

.sidebar-brand {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    text-decoration: none;
    color: var(--text-primary);
    min-width: 0;
}

.sidebar-brand-dot {
    width: 36px;
    height: 36px;
    border-radius: var(--radius-md);
    background: linear-gradient(135deg, var(--accent) 0%, var(--accent-2) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    box-shadow: 0 0 20px var(--accent-glow);
}

.sidebar-brand-dot .material-symbols-outlined {
    font-size: 1.25rem;
    color: #fff;
}

.sidebar-brand-text {
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 1rem;
    letter-spacing: -0.02em;
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    transition: opacity 0.2s ease, max-width 0.3s ease;
    max-width: 160px;
}

.sidebar.collapsed .sidebar-brand-text {
    opacity: 0;
    max-width: 0;
}

/* ── Toggle Button ── */
.sidebar-toggle {
    width: 32px;
    height: 32px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border);
    background: var(--surface);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.2s ease;
    flex-shrink: 0;
    color: var(--text-secondary);
}

.sidebar-toggle:hover {
    background: var(--primary-light);
    border-color: var(--primary);
    color: var(--primary);
}

.sidebar-toggle .material-symbols-outlined {
    font-size: 18px;
    transition: transform 0.3s ease;
}

.sidebar.collapsed .sidebar-toggle .material-symbols-outlined {
    transform: rotate(180deg);
}

/* ── Sidebar Navigation ── */
.sidebar-nav {
    flex: 1;
    overflow-y: auto;
    overflow-x: hidden;
    padding: var(--space-3);
    display: flex;
    flex-direction: column;
    gap: 2px;
}

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

.sidebar-nav::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 2px;
}

/* ── Sidebar Section Title ── */
.sidebar-section-title {
    font-size: 0.625rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--text-muted);
    padding: var(--space-3) var(--space-3) var(--space-1);
    white-space: nowrap;
    overflow: hidden;
    transition: opacity 0.2s ease;
    position: relative;
}

.sidebar-section-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: var(--space-3);
    right: var(--space-3);
    height: 1px;
    background: linear-gradient(90deg,
        transparent 0%,
        var(--border) 20%,
        var(--border) 80%,
        transparent 100%);
}

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

/* ── Sidebar Links ── */
.sidebar-link {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.625rem 0.75rem;
    border-radius: var(--radius-md);
    text-decoration: none;
    color: var(--text-secondary);
    font-size: 0.85rem;
    font-weight: 500;
    transition: all 0.25s cubic-bezier(0.22, 1.2, 0.36, 1);
    position: relative;
    white-space: nowrap;
    cursor: pointer;
}

.sidebar-link:hover {
    background: linear-gradient(90deg,
        rgba(92, 98, 252, 0.08) 0%,
        transparent 100%);
    color: var(--text-primary);
    transform: translateX(2px);
}

.sidebar-link.active {
    background: linear-gradient(135deg,
        rgba(92, 98, 252, 0.12) 0%,
        rgba(157, 80, 255, 0.08) 100%);
    color: var(--accent);
}

.sidebar-link.active .sidebar-link-icon {
    font-variation-settings: 'FILL' 1, 'wght' 400;
}

/* Active indicator bar with glow */
.sidebar-link.active::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 3px;
    height: 20px;
    border-radius: 0 3px 3px 0;
    background: var(--gradient-primary);
    box-shadow: 0 0 12px var(--primary-glow);
}

/* ── Sidebar Link Icon ── */
.sidebar-link-icon {
    font-size: 20px;
    flex-shrink: 0;
    width: 24px;
    text-align: center;
}

/* ── Sidebar Link Text ── */
.sidebar-link-text {
    flex: 1;
    overflow: hidden;
    transition: opacity 0.2s ease, max-width 0.3s ease;
    max-width: 180px;
}

.sidebar.collapsed .sidebar-link-text {
    opacity: 0;
    max-width: 0;
}

/* ── Sidebar Footer ── */
.sidebar-footer {
    padding: var(--space-3);
    border-top: 1px solid var(--border-light);
    flex-shrink: 0;
    position: relative;
}

.sidebar-footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: var(--space-4);
    right: var(--space-4);
    height: 1px;
    background: linear-gradient(90deg,
        transparent 0%,
        var(--accent-glow, rgba(92, 98, 252, 0.3)) 50%,
        transparent 100%);
}

/* ── User Card ── */
.sidebar-user-card {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: var(--space-2);
    border-radius: var(--radius-md);
    margin-bottom: var(--space-2);
}

.sidebar-avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--accent) 0%, var(--accent-2) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
    font-weight: 700;
    color: #fff;
    flex-shrink: 0;
    box-shadow: 0 4px 16px var(--accent-glow);
}

.sidebar-user-info {
    display: flex;
    flex-direction: column;
    gap: 1px;
    min-width: 0;
    overflow: hidden;
    transition: opacity 0.2s ease, max-width 0.3s ease;
    max-width: 160px;
}

.sidebar.collapsed .sidebar-user-info {
    opacity: 0;
    max-width: 0;
}

.sidebar-user-name {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-primary);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.sidebar-user-role {
    font-size: 0.65rem;
    color: var(--text-muted);
    text-transform: capitalize;
}

/* ── Logout Button ── */
.sidebar-logout-btn {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.625rem 0.75rem;
    border-radius: var(--radius-md);
    background: none;
    border: none;
    cursor: pointer;
    color: var(--danger);
    font-size: 0.85rem;
    font-weight: 500;
    width: 100%;
    transition: all 0.2s ease;
    white-space: nowrap;
}

.sidebar-logout-btn:hover {
    background: var(--error-muted);
}

.sidebar-logout-btn .material-symbols-outlined {
    font-size: 20px;
    flex-shrink: 0;
}

.sidebar-logout-btn .sidebar-link-text {
    flex: 1;
    text-align: left;
}

/* ── Sidebar Overlay (Mobile) ── */
.sidebar-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    z-index: 45;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
}

.sidebar-overlay.active {
    opacity: 1;
    pointer-events: auto;
}

/* ── Mobile Menu Button ── */
.mobile-menu-btn {
    display: none;
    width: 40px;
    height: 40px;
    border: 1px solid var(--border);
    background: var(--surface);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    cursor: pointer;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
    flex-shrink: 0;
}

.mobile-menu-btn:hover {
    background: var(--primary-light);
    border-color: var(--primary);
    color: var(--primary);
}

.mobile-menu-btn .material-symbols-outlined {
    font-size: 22px;
}

/* ══════════════════════════════════════
   DESKTOP STYLES (>= 769px)
   ══════════════════════════════════════ */
@media (min-width: 769px) {
    .sidebar-overlay {
        display: none !important;
    }

    .sidebar-close-btn {
        display: none;
    }

    /* Collapsed text handling */
    .sidebar.collapsed .sidebar-link {
        justify-content: center;
        padding: 0.625rem;
    }

    .sidebar.collapsed .sidebar-brand {
        justify-content: center;
    }

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

    .sidebar.collapsed .sidebar-logout-btn {
        justify-content: center;
        padding: 0.625rem;
    }

    /* Tooltip on collapsed hover */
    .sidebar.collapsed .sidebar-link[title]:hover::after {
        content: attr(title);
        position: absolute;
        left: calc(100% + 8px);
        top: 50%;
        transform: translateY(-50%);
        background: var(--surface);
        color: var(--text-primary);
        padding: var(--space-2) var(--space-3);
        border-radius: var(--radius-sm);
        font-size: 0.75rem;
        white-space: nowrap;
        box-shadow: var(--shadow-lg);
        border: 1px solid var(--border);
        z-index: 100;
        pointer-events: none;
    }
}

/* ══════════════════════════════════════
   MOBILE STYLES (<= 768px)
   ══════════════════════════════════════ */
@media (max-width: 768px) {
    .sidebar {
        width: 280px;
        transform: translateX(-100%);
        box-shadow: var(--shadow-xl);
    }

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

    .sidebar.collapsed {
        width: 280px;
    }

    /* Reset collapsed state on mobile */
    .sidebar.collapsed .sidebar-brand-text,
    .sidebar.collapsed .sidebar-link-text,
    .sidebar.collapsed .sidebar-user-info,
    .sidebar.collapsed .sidebar-section-title {
        opacity: 1;
        max-width: 160px;
    }

    .sidebar.collapsed .sidebar-link,
    .sidebar.collapsed .sidebar-brand,
    .sidebar.collapsed .sidebar-user-card,
    .sidebar.collapsed .sidebar-logout-btn {
        justify-content: flex-start;
    }

    .sidebar.collapsed .sidebar-toggle .material-symbols-outlined {
        transform: none;
    }

    .sidebar-overlay {
        display: block;
    }

    .mobile-menu-btn {
        display: flex;
    }

    .sidebar-close-btn {
        display: flex;
    }

    /* Lock body scroll when sidebar is open */
    body.sidebar-open {
        overflow: hidden;
    }
}

/* ── Close button for mobile ── */
.sidebar-close-btn {
    display: none;
    width: 32px;
    height: 32px;
    border: none;
    background: var(--surface-muted);
    border-radius: var(--radius-sm);
    color: var(--text-muted);
    cursor: pointer;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
    flex-shrink: 0;
}

.sidebar-close-btn:hover {
    background: var(--border);
    color: var(--text-primary);
}

.sidebar-close-btn .material-symbols-outlined {
    font-size: 18px;
}

/* ══════════════════════════════════════
   LARGE SCREENS (>= 1280px)
   ══════════════════════════════════════ */
@media (min-width: 1280px) {
    .sidebar-toggle {
        display: flex;
    }
}

@media (max-width: 1279px) and (min-width: 769px) {
    .sidebar-toggle {
        display: flex;
    }
}