/* Modern Navbar Styles */
.navbar {
    background: rgba(255, 255, 255, 0.8) !important;
    backdrop-filter: blur(12px) saturate(180%);
    -webkit-backdrop-filter: blur(12px) saturate(180%);
    border-bottom: 1px solid rgba(231, 231, 231, 0.4);
    padding: 0.75rem 0;
    transition: all 0.3s ease;
}

.navbar.sticky-top {
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.03);
    transition: all 0.3s ease;
}

.navbar.navbar-scrolled {
    padding: 0.5rem 0;
    background: rgba(255, 255, 255, 0.95) !important;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
    border-bottom-color: rgba(99, 102, 241, 0.1);
}

.navbar-brand img {
    height: 40px;
    width: auto;
    transition: transform 0.3s ease;
}

.navbar-brand:hover img {
    transform: scale(1.05);
}

/* Modern Search in Navbar */
.nav-search-container {
    margin-left: 20px;
    position: relative;
    max-width: 320px;
    width: 100%;
}

#navSearchInput {
    background-color: #f1f5f9 !important;
    border: 1px solid transparent !important;
    border-radius: 100px !important;
    padding: 10px 15px 10px 45px !important;
    font-size: 14px !important;
    transition: all 0.2s ease !important;
    color: #334155 !important;
    height: 42px !important;
}

#navSearchInput:focus {
    background-color: #ffffff !important;
    border-color: #e2e8f0 !important;
    box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.1) !important;
    width: 380px;
}

.search-icon-nav {
    position: absolute;
    left: 18px;
    top: 50%;
    transform: translateY(-50%);
    color: #94a3b8;
    pointer-events: none;
    font-size: 16px;
    z-index: 5;
}

/* Modern Nav Links */
.navbar-nav .nav-item {
    margin: 0 4px;
}

.navbar-nav .nav-link {
    color: #475569 !important;
    font-weight: 500 !important;
    font-size: 15px !important;
    padding: 10px 16px !important;
    border-radius: 12px;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    gap: 8px;
}

.navbar-nav .nav-link:hover {
    background-color: #f8fafc;
    color: #6366f1 !important;
}

.navbar-nav .nav-link i {
    font-size: 18px;
    color: #64748b;
    transition: color 0.2s ease;
}

.navbar-nav .nav-link:hover i {
    color: #6366f1;
}

.navbar-nav .nav-link .menu-item-name {
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
}

/* Active State */
.navbar-nav .nav-link.active {
    color: #6366f1 !important;
    background-color: rgba(99, 102, 241, 0.08);
}

.navbar-nav .nav-link.active i {
    color: #6366f1;
}

/* Login Button */
#loginModalBtn, .nav-login-btn-premium {
    background: #ffffff !important;
    border: 1px solid #e2e8f0 !important;
    border-radius: 100px !important;
    padding: 10px 24px !important;
    font-weight: 600 !important;
    font-size: 14px !important;
    color: #334155 !important;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.02) !important;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1) !important;
    display: flex;
    align-items: center;
    gap: 8px;
}

#loginModalBtn:hover, .nav-login-btn-premium:hover {
    border-color: #94a3b8 !important;
    background: #f8fafc !important;
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05) !important;
}

#loginModalBtn i {
    font-size: 16px;
    color: #64748b;
}

/* Credits Badge */
.text-yellow-500 {
    color: #d97706 !important;
}

.credit-badge {
    background: #fef3c7;
    color: #d97706 !important;
    padding: 6px 12px !important;
    border-radius: 100px !important;
    font-weight: 700 !important;
}

.credit-badge:hover {
    background: #fde68a !important;
}

/* Mobile Adjustments */
.nav-login-btn-premium.compact {
    padding: 0 !important;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50% !important;
    background: #f8fafc !important;
    border: 1px solid #e2e8f0 !important;
    color: #475569 !important;
}

.nav-login-btn-premium.compact i {
    font-size: 18px;
    margin: 0;
}

@media (max-width: 991px) {
    .navbar {
        padding: 0.5rem 0 !important;
        min-height: 60px;
        display: flex;
        align-items: center;
    }

    .nav-search-container {
        margin: 0 25px 0 20px;
        max-width: none;
        flex: 1;
        display: flex !important;
        align-items: center;
    }
    
    #navSearchInput {
        width: 100% !important;
        padding-left: 38px !important;
        padding-right: 12px !important;
        height: 38px !important;
        border-radius: 20px !important;
        background-color: #f1f5f9 !important;
        font-size: 14px !important;
    }

    .search-icon-nav {
        left: 14px;
        font-size: 14px;
        color: #94a3b8;
    }

    .mobile-nav-icon {
        color: #334155;
        width: 40px;
        height: 40px;
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 1.25rem !important;
        cursor: pointer;
        transition: all 0.2s ease;
    }

    .mobile-nav-icon:active {
        background: #f1f5f9;
        border-radius: 50%;
        transform: scale(0.9);
    }

    .mobile-nav-icon {
        margin-right: 5px;
    }

    .navbar-brand img {
        height: 32px !important;
        margin-left: 5px;
    }

    .mobile-t-right {
        margin-right: 5px;
    }
}

/* Premium Mobile Side Menu (Offcanvas) Refinement */
#sideMenuMobile {
    border-radius: 0 32px 32px 0 !important;
    border: none !important;
    box-shadow: 25px 0 80px rgba(0, 0, 0, 0.15) !important;
    background: #ffffff !important;
    overflow: hidden;
}

#sideMenuMobile .offcanvas-header {
    padding: 1.5rem;
    border-bottom: 1px solid rgba(0, 0, 0, 0.03);
    background: linear-gradient(135deg, #f8faff 0%, #ffffff 100%);
    position: relative;
}

#sideMenuMobile .offcanvas-header::after {
    content: '';
    position: absolute;
    bottom: -1px;
    left: 1.5rem;
    right: 1.5rem;
    height: 1px;
    background: linear-gradient(to right, transparent, #e2e8f0, transparent);
}

#sideMenuMobile .offcanvas-title {
    font-weight: 900;
    color: #1e1b4b;
    font-size: 1.4rem;
    letter-spacing: -0.8px;
    display: flex;
    align-items: center;
    gap: 12px;
}

#sideMenuMobile .offcanvas-body {
    padding: 1rem 0 !important;
    background: #ffffff;
}

.m-nav-section-label {
    font-size: 10px;
    font-weight: 800;
    text-transform: uppercase;
    color: #94a3b8;
    margin: 1.25rem 0 0.5rem 1.25rem;
    letter-spacing: 1.2px;
}

.m-nav-item {
    margin-bottom: 8px;
}

.m-nav-item .dropdown-item {
    padding: 10px 14px !important;
    border-radius: 14px;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    border: 1px solid transparent;
    background: #f8fafc;
    display: flex;
    align-items: center;
    gap: 12px;
}

.m-nav-item .grade-icon-box {
    width: 32px;
    height: 32px;
    background: #ffffff;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #6366f1;
    font-size: 13px;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05);
    flex-shrink: 0;
}

.m-nav-item .dropdown-item h6 {
    font-weight: 700;
    font-size: 0.9rem;
    color: #334155;
    margin: 0;
    flex-grow: 1;
}

.m-nav-item .dropdown-item i.fa-chevron-down {
    font-size: 10px;
    color: #cbd5e1;
    transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.m-nav-item.open .dropdown-item {
    background: #ffffff;
    border-color: #6366f1;
    box-shadow: 0 10px 15px -3px rgba(99, 102, 241, 0.1);
}

.m-nav-item.open .grade-icon-box {
    background: #6366f1;
    color: #ffffff;
}

.m-nav-item.open i.fa-chevron-down {
    transform: rotate(180deg);
    color: #6366f1;
}

.subjects-container {
    padding: 10px 10px 10px 15px !important;
    background: #ffffff;
    border-left: 2px solid #f1f5f9;
    margin-left: 33px;
    margin-top: 4px;
    animation: slideDownFade 0.3s ease-out;
}

@keyframes slideDownFade {
    from { opacity: 0; transform: translateY(-10px); }
    to { opacity: 1; transform: translateY(0); }
}

.subjects-container .dropdown-item {
    padding: 10px 12px !important;
    font-size: 14px !important;
    color: #475569 !important;
    font-weight: 600 !important;
    background: transparent;
    border: none;
    gap: 10px;
}

.subject-dot {
    width: 6px;
    height: 6px;
    background: #cbd5e1;
    border-radius: 50%;
    transition: all 0.2s ease;
}

.subjects-container .dropdown-item:active,
.subjects-container .dropdown-item:hover {
    color: #6366f1 !important;
    background: rgba(99, 102, 241, 0.05) !important;
}

.subjects-container .dropdown-item:active .subject-dot,
.subjects-container .dropdown-item:hover .subject-dot {
    background: #6366f1;
    box-shadow: 0 0 8px #6366f1;
}

.side-menu-footer {
    padding: 1.5rem;
    background: #f8fafc;
    border-top: 1px solid #f1f5f9;
}

.footer-link-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 0;
    color: #64748b;
    text-decoration: none !important;
    font-size: 14px;
    font-weight: 600;
    transition: color 0.2s ease;
}

.footer-link-item:hover {
    color: #6366f1;
}

.footer-link-item i {
    font-size: 16px;
    width: 20px;
    text-align: center;
}


/* Drill-down Menu Styles */
.offcanvas-body {
    position: relative;
    overflow-x: hidden !important;
    display: flex;
    flex-direction: column;
}

.menu-panels-container {
    display: flex;
    width: 400%; /* 4 panels: Main, Grades, Subjects, Units */
    height: 100%;
    transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.menu-panel {
    width: 25%;
    flex-shrink: 0;
    padding: 0.5rem 1.25rem 100px 1.25rem;
    height: 100%;
    overflow-y: auto;
}

.view-grades .menu-panels-container {
    transform: translateX(-25%);
}

.view-subjects .menu-panels-container {
    transform: translateX(-50%);
}

.view-units .menu-panels-container {
    transform: translateX(-75%);
}

.panel-back-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 12px;
    color: #6366f1;
    font-weight: 700;
    font-size: 13px;
    border: 1px solid rgba(99, 102, 241, 0.1);
    background: rgba(99, 102, 241, 0.03);
    border-radius: 100px;
    cursor: pointer;
    margin-bottom: 1.5rem;
    transition: all 0.2s ease;
}

.panel-back-btn:active {
    background: rgba(99, 102, 241, 0.1);
    transform: translateX(-3px);
}

.panel-header-title {
    font-size: 1.25rem;
    font-weight: 900;
    color: #1e1b4b;
    margin-bottom: 1.25rem;
    letter-spacing: -0.5px;
}

.main-nav-card {
    background: linear-gradient(135deg, #6366f1 0%, #4f46e5 100%);
    color: white !important;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px;
    border-radius: 20px;
    margin-bottom: 1.5rem;
    box-shadow: 0 10px 25px rgba(99, 102, 241, 0.3);
}

.main-nav-card h5 {
    margin: 0;
    font-weight: 800;
}

.main-nav-card i {
    font-size: 1.5rem;
    opacity: 0.8;
}

.subject-item-premium {
    display: flex;
    align-items: center;
    gap: 15px;
    padding: 12px 16px;
    background: #f8fafc;
    border-radius: 12px;
    margin-bottom: 8px;
    color: #334155;
    text-decoration: none !important;
    transition: all 0.2s ease;
}

.subject-item-premium:active {
    background: #f1f5f9;
    transform: scale(0.98);
}

.grade-link-item {
    cursor: pointer;
}