/* ===============================================
   SAHE SMS - Light Theme Sidebar Navigation
   Clean, professional design matching SAHE branding
   Primary: Navy Blue (#1e3a5f) | Accent: Navy
   =============================================== */

/* ===== SIDEBAR BASE ===== */
.sidebar {
    position: fixed;
    top: 0;
    left: 0;
    width: 270px;
    height: 100vh;
    background: var(--white);
    border-right: 1px solid var(--gray-200);
    display: flex;
    flex-direction: column;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: 1000;
    overflow: hidden;
}

.sidebar.collapsed {
    width: 76px;
}

/* ===== SIDEBAR HEADER ===== */
.sidebar-header {
    padding: var(--space-4) var(--space-5);
    display: flex;
    align-items: center;
    justify-content: space-between;
    min-height: 68px;
    border-bottom: 1px solid var(--gray-100);
    flex-shrink: 0;
    background: linear-gradient(135deg, var(--primary) 0%, #2a4a6f 100%);
}

.sidebar.collapsed .sidebar-header {
    justify-content: center;
    padding: var(--space-4) var(--space-3);
}

.sidebar-brand {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    text-decoration: none;
    transition: all 0.3s ease;
    overflow: hidden;
}

.sidebar.collapsed .sidebar-brand {
    opacity: 0;
    width: 0;
    pointer-events: none;
}

.sidebar-brand img {
    height: 36px;
    width: auto;
    flex-shrink: 0;
}

/* Make logo white in header */
.sidebar-logo {
    filter: brightness(0) invert(1);
}

.sidebar-brand-text {
    font-size: var(--text-lg);
    font-weight: var(--font-bold);
    color: var(--white);
    white-space: nowrap;
    letter-spacing: -0.01em;
}

.sidebar-toggle {
    width: 36px;
    height: 36px;
    border-radius: var(--radius-md);
    background: rgba(255, 255, 255, 0.15);
    border: none;
    color: var(--white);
    font-size: var(--text-sm);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
    flex-shrink: 0;
}

.sidebar-toggle:hover {
    background: rgba(255, 255, 255, 0.25);
}

.sidebar.collapsed .sidebar-toggle {
    background: var(--accent);
    color: var(--white);
    width: 40px;
    height: 40px;
    border-radius: var(--radius-lg);
}

.sidebar.collapsed .sidebar-toggle:hover {
    background: var(--accent-dark);
    transform: scale(1.05);
}

/* ===== SIDEBAR NAVIGATION ===== */
.sidebar-nav {
    flex: 1;
    overflow-y: auto;
    overflow-x: hidden;
    padding: var(--space-4) var(--space-3);
}

.sidebar.collapsed .sidebar-nav {
    padding: var(--space-3) var(--space-2);
}

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

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

.sidebar-nav::-webkit-scrollbar-thumb {
    background: var(--gray-200);
    border-radius: 10px;
}

.sidebar-nav::-webkit-scrollbar-thumb:hover {
    background: var(--gray-300);
}

/* ===== NAVIGATION SECTIONS ===== */
.nav-section {
    margin-bottom: var(--space-3);
}

.nav-section-header {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding: 8px 10px;
    margin-bottom: var(--space-1);
    cursor: pointer;
    user-select: none;
    border-radius: var(--radius-md);
    background: transparent;
    transition: all 0.2s ease;
}

.nav-section-header:hover {
    background: var(--gray-50);
}

.nav-section-icon {
    width: 26px;
    height: 26px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--primary-50);
    color: var(--primary);
    font-size: 12px;
    flex-shrink: 0;
    border-radius: var(--radius-md);
    transition: all 0.2s ease;
}

.nav-section-header:hover .nav-section-icon {
    background: var(--primary);
    color: var(--white);
}

.nav-section-title {
    flex: 1;
    font-size: 12px;
    font-weight: var(--font-semibold);
    color: var(--gray-600);
    white-space: nowrap;
    overflow: hidden;
    transition: opacity 0.2s ease;
}

.sidebar.collapsed .nav-section-title {
    opacity: 0;
    width: 0;
}

.nav-section-toggle {
    width: 20px;
    height: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--gray-400);
    font-size: 10px;
    transition: all 0.3s ease;
}

.nav-section-header:hover .nav-section-toggle {
    color: var(--gray-600);
}

.nav-section.collapsed .nav-section-toggle {
    transform: rotate(-90deg);
}

.sidebar.collapsed .nav-section-toggle {
    display: none;
}

/* ===== NAVIGATION CONTENT ===== */
.nav-section-content {
    overflow: hidden;
    transition: all 0.3s ease;
    padding-left: var(--space-1);
    margin-left: 13px;
    border-left: 2px solid var(--gray-200);
}

.nav-section.collapsed .nav-section-content {
    height: 0 !important;
    opacity: 0;
    margin: 0;
    padding: 0;
    border: none;
}

.sidebar.collapsed .nav-section-content {
    display: none;
}

/* ===== NAVIGATION ITEMS ===== */
.nav-item {
    margin: 1px 0;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding: 8px 12px;
    margin-left: var(--space-2);
    border-radius: var(--radius-md);
    color: var(--gray-600);
    text-decoration: none;
    font-size: 13px;
    font-weight: var(--font-medium);
    transition: all 0.2s ease;
    position: relative;
}

.nav-link:hover {
    background: var(--primary-50);
    color: var(--primary);
}

.nav-link.active {
    background: var(--primary);
    color: var(--white);
}

.nav-link.active:hover {
    background: var(--primary);
}

/* Active indicator line */
.nav-link.active::before {
    content: '';
    position: absolute;
    left: -10px;
    top: 50%;
    transform: translateY(-50%);
    width: 3px;
    height: 20px;
    background: var(--accent);
    border-radius: 0 2px 2px 0;
}

.nav-link i {
    width: 18px;
    text-align: center;
    font-size: 13px;
    flex-shrink: 0;
    opacity: 0.7;
}

.nav-link:hover i {
    opacity: 1;
}

.nav-link.active i {
    opacity: 1;
}

.nav-link-text {
    flex: 1;
    white-space: nowrap;
    overflow: hidden;
    transition: opacity 0.2s ease;
}

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

/* Navigation Badge */
.nav-badge {
    padding: 2px 7px;
    font-size: 10px;
    font-weight: var(--font-bold);
    background: var(--accent);
    color: var(--white);
    border-radius: var(--radius-full);
    min-width: 18px;
    text-align: center;
    line-height: 1.2;
}

.nav-link.active .nav-badge {
    background: var(--white);
    color: var(--primary);
}

.sidebar.collapsed .nav-badge {
    position: absolute;
    top: 4px;
    right: 4px;
    padding: 2px 5px;
    font-size: 9px;
    min-width: 14px;
}

/* ===== SIDEBAR FOOTER ===== */
.sidebar-footer {
    padding: var(--space-4);
    border-top: 1px solid var(--gray-100);
    flex-shrink: 0;
    background: var(--gray-50);
}

.sidebar.collapsed .sidebar-footer {
    padding: var(--space-3);
}

/* User Profile in Sidebar */
.sidebar-user {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-3);
    border-radius: var(--radius-lg);
    background: var(--white);
    border: 1px solid var(--gray-200);
    text-decoration: none;
    transition: all 0.2s ease;
}

.sidebar-user:hover {
    border-color: var(--primary);
    box-shadow: 0 2px 8px rgba(30, 58, 95, 0.1);
}

.sidebar.collapsed .sidebar-user {
    justify-content: center;
    padding: var(--space-2);
    border: none;
    background: transparent;
}

.user-avatar {
    width: 38px;
    height: 38px;
    border-radius: var(--radius-lg);
    background: var(--primary);
    color: var(--white);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: var(--font-bold);
    font-size: var(--text-sm);
    flex-shrink: 0;
}

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

.sidebar.collapsed .user-info {
    display: none;
}

.user-name {
    font-size: 13px;
    font-weight: var(--font-semibold);
    color: var(--gray-900);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    display: block;
}

.user-role {
    font-size: 11px;
    color: var(--gray-500);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    display: block;
    margin-top: 1px;
}

/* Logout Button */
.sidebar-logout {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    width: 100%;
    padding: 10px;
    margin-top: var(--space-3);
    background: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-md);
    color: var(--gray-600);
    font-size: 13px;
    font-weight: var(--font-medium);
    cursor: pointer;
    transition: all 0.2s ease;
    text-decoration: none;
}

.sidebar-logout:hover {
    background: #fef2f2;
    border-color: #fecaca;
    color: #dc2626;
}

.sidebar.collapsed .sidebar-logout span {
    display: none;
}

/* ===== COLLAPSED STATE TOOLTIPS ===== */
.sidebar.collapsed .nav-link {
    justify-content: center;
    padding: 12px;
    margin-left: 0;
}

.sidebar.collapsed .nav-link.active::before {
    display: none;
}

.sidebar.collapsed .nav-section-header {
    justify-content: center;
    padding: var(--space-2);
    background: transparent;
    margin-bottom: 0;
}

.sidebar.collapsed .nav-section-icon {
    width: 38px;
    height: 38px;
    font-size: 14px;
    background: var(--primary);
    color: var(--white);
}

/* Tooltip */
.sidebar.collapsed .nav-link[data-tooltip]::after {
    content: attr(data-tooltip);
    position: absolute;
    left: calc(100% + 12px);
    top: 50%;
    transform: translateY(-50%);
    padding: 8px 12px;
    background: var(--primary);
    color: var(--white);
    font-size: 12px;
    font-weight: var(--font-medium);
    border-radius: var(--radius-md);
    white-space: nowrap;
    opacity: 0;
    visibility: hidden;
    transition: all 0.2s ease;
    z-index: 1001;
    pointer-events: none;
    box-shadow: 0 4px 12px rgba(30, 58, 95, 0.2);
}

.sidebar.collapsed .nav-link[data-tooltip]::before {
    content: '';
    position: absolute;
    left: calc(100% + 6px);
    top: 50%;
    transform: translateY(-50%);
    border: 5px solid transparent;
    border-right-color: var(--primary);
    opacity: 0;
    visibility: hidden;
    transition: all 0.2s ease;
}

.sidebar.collapsed .nav-link:hover::after,
.sidebar.collapsed .nav-link:hover::before {
    opacity: 1;
    visibility: visible;
}

/* ===== MOBILE SIDEBAR ===== */
@media (max-width: 1024px) {
    .sidebar {
        transform: translateX(-100%);
        box-shadow: none;
    }
    
    .sidebar.mobile-open {
        transform: translateX(0);
        box-shadow: 0 0 40px rgba(0, 0, 0, 0.15);
    }
    
    .sidebar.collapsed {
        width: 270px;
    }
    
    /* Mobile overlay */
    .sidebar-overlay {
        position: fixed;
        inset: 0;
        background: rgba(0, 0, 0, 0.4);
        backdrop-filter: blur(2px);
        z-index: 999;
        opacity: 0;
        visibility: hidden;
        transition: all 0.3s ease;
    }
    
    .sidebar-overlay.active {
        opacity: 1;
        visibility: visible;
    }
}

/* ===== MAIN CONTENT ADJUSTMENT ===== */
html:not(.sidebar-collapsed) .main-content {
    margin-left: 270px;
}

html.sidebar-collapsed .main-content {
    margin-left: 76px;
}

@media (max-width: 1024px) {
    html:not(.sidebar-collapsed) .main-content,
    html.sidebar-collapsed .main-content {
        margin-left: 0;
    }
}

/* ===== DIVIDER ===== */
.nav-divider {
    height: 1px;
    background: var(--gray-200);
    margin: var(--space-3) var(--space-3);
}

/* ===== DASHBOARD LINK (Top nav item) ===== */
.sidebar-nav > .nav-item:first-child .nav-link {
    background: var(--gray-50);
    color: var(--gray-700);
    font-weight: var(--font-medium);
    margin-left: 0;
    padding: 10px 12px;
    border-radius: var(--radius-md);
    border: 1px solid var(--gray-200);
}

.sidebar-nav > .nav-item:first-child .nav-link::before {
    display: none;
}

.sidebar-nav > .nav-item:first-child .nav-link:hover {
    background: var(--gray-100);
    border-color: var(--gray-300);
    color: var(--gray-900);
}

.sidebar-nav > .nav-item:first-child .nav-link.active {
    background: var(--primary);
    color: var(--white);
    border-color: var(--primary);
}

.sidebar-nav > .nav-item:first-child .nav-link.active:hover {
    background: var(--primary-dark);
}

.sidebar-nav > .nav-item:first-child .nav-link i {
    opacity: 0.8;
}

.sidebar-nav > .nav-item:first-child .nav-link:hover i,
.sidebar-nav > .nav-item:first-child .nav-link.active i {
    opacity: 1;
}