/* Standardized Sticky Grade Navigation */
.tzo-sticky-grade-nav {
    position: relative;
    background: var(--tzq-bg-primary, #ffffff);
    border-bottom: 1px solid var(--tzq-border-light, #e2e8f0);
    padding: 0.75rem 0;
    margin-bottom: 2rem;
}

.tzo-sticky-grade-nav--header-attached {
    position: relative;
    z-index: 10;
    background: var(--tzq-bg-primary, #ffffff);
    border-bottom: 2px solid var(--tzq-border-light, #f1f5f9);
    width: 100%;
}

@media (max-width: 1024px) {
    .tzo-sticky-grade-nav--header-attached {
        display: none !important;
    }
}

.tzo-sticky-grade-nav .sub-menu, 
.tzo-sticky-grade-nav ul ul { 
    display: none !important; 
}

/* Mobile Toggle Buttons */
.tzq-mobile-grade-toggle {
    display: none !important;
}

@media (max-width: 991px) {
    .tzq-mobile-grade-toggle {
        display: flex !important;
        margin: 0 auto !important;
        gap: 10px;
        background: var(--tzq-primary) !important;
        border: 1px solid var(--tzq-primary-dark) !important;
        box-shadow: 0 4px 12px rgba(var(--tzq-primary-rgb), 0.2) !important;
        color: #ffffff !important;
        width: 95% !important;
        max-width: 400px !important;
        padding: 0 20px !important;
        border-radius: 12px !important;
        height: 48px !important;
        font-weight: 700;
        font-size: 1.2rem;
        font-family: inherit;
    }
    .tzq-mobile-grade-toggle .tzq-mobile-class-btn__icon {
        color: #ffffff !important;
        font-size: 20px !important;
    }
    .tzo-sticky-grade-nav .tzo-grade-nav-container {
        display: none;
        padding: 8px !important;
        background: var(--tzq-bg-secondary) !important;
        border: 1px solid var(--tzq-border-light);
        border-radius: 12px !important;
        flex-direction: column !important;
        gap: 4px !important;
        justify-content: flex-start !important;
        overflow: visible !important;
        width: 95% !important;
        margin: 0 auto 20px !important;
        box-shadow: var(--tzq-shadow-lg) !important;
    }
    .tzo-sticky-grade-nav.tzo-sticky-grade-nav--open .tzo-grade-nav-container {
        display: flex !important;
    }
    .tzo-sticky-grade-nav.tzo-sticky-grade-nav--open .tzq-mobile-grade-toggle__arrow {
        transform: rotate(180deg);
    }
    .tzq-mobile-grade-toggle__arrow {
        transition: transform 0.3s ease;
        font-size: 18px !important;
    }
}

.tzo-sticky-grade-nav--pdf-context {
    position: relative !important;
    top: auto !important;
    border-bottom-color: var(--tzq-primary-light, #3b82f6);
    box-shadow: none !important;
}

.tzo-sticky-grade-nav--deneme-context {
    position: relative !important;
    top: auto !important;
    border-bottom-color: #6366f1;
    background: linear-gradient(to bottom, #eef2ff, var(--tzq-bg-primary, #ffffff));
    box-shadow: none !important;
}
.tzo-sticky-grade-nav--deneme-context .tzo-sticky-grade-nav,
.tzo-sticky-grade-nav--deneme-context .tzo-sticky-grade-nav--deneme {
    background: #eef2ff;
    border-bottom: none;
    padding: 0.5rem 0 0.6rem;
    margin-bottom: 0;
    box-shadow: none;
    position: static;
}
.tzo-sticky-grade-nav--deneme-context .tzo-grade-tab:hover,
.tzo-sticky-grade-nav--deneme-context .tzo-grade-tab.active {
    background: var(--tzq-indigo-600, #4f46e5);
    color: #fff;
    border-color: var(--tzq-indigo-600, #4f46e5);
    box-shadow: 0 4px 12px rgba(79, 70, 229, 0.3);
}

.tzo-sticky-grade-nav--yazili {
    border-bottom-color: #6366f1;
    background: linear-gradient(to bottom, #f5f3ff, #ffffff);
}
.tzo-sticky-grade-nav--yazili .tzo-grade-tab.active {
    background: linear-gradient(135deg, #6366f1 0%, #4f46e5 100%) !important;
    border-color: transparent !important;
    box-shadow: 0 8px 16px rgba(99, 102, 241, 0.2);
}

.tzo-sticky-grade-nav--pdf-context .tzo-grade-tab:hover,
.tzo-sticky-grade-nav--pdf-context .tzo-grade-tab.active {
    background: var(--tzq-primary, #2563eb);
    color: #fff;
    border-color: var(--tzq-primary, #2563eb);
    box-shadow: var(--tzq-shadow-primary);
}

.tzo-sticky-grade-nav--header-attached .tzo-sticky-grade-nav {
    position: static;
    background: transparent;
    border-bottom: none;
    padding: 0.5rem 0 0.6rem;
    margin-bottom: 0;
    box-shadow: none;
}
.tzo-sticky-grade-nav--header-attached .tzo-grade-nav-container {
    padding: 0;
}

@media (max-width: 600px) {
    .tzo-sticky-grade-nav--header-attached .tzo-sticky-grade-nav {
        padding: 0.4rem 0 0.5rem;
    }
    body.admin-bar .tzo-sticky-grade-nav--header-attached {
        top: 46px;
    }
}
@media screen and (max-width: 480px) {
    body.admin-bar .tzo-sticky-grade-nav--header-attached {
        top: calc(var(--tzq-header-height-mobile, 60px) + 46px) !important;
    }
}
@media screen and (max-width: 782px) {
    body.admin-bar .tzo-sticky-grade-nav--header-attached {
        top: 32px;
    }
}

@media print {
    .tzo-sticky-grade-nav--header-attached {
        display: none !important;
    }
}

.tzo-grade-nav-container {
    display: flex;
    gap: 0.5rem;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    max-width: var(--tzq-container-width, 1200px);
    margin: 0 auto;
    padding: 0 1.25rem;
}
.tzo-grade-nav-container::-webkit-scrollbar { display: none; }

.tzo-grade-tab {
    padding: 0.6rem 1.25rem;
    border-radius: var(--tzq-spacing-xs, 8px);
    background: var(--tzq-bg-secondary, #f1f5f9);
    color: var(--tzq-text-secondary, #475569);
    font-weight: 750;
    font-size: 0.9rem;
    white-space: nowrap;
    border: 1px solid var(--tzq-border-light, #e2e8f0);
    cursor: pointer;
    text-decoration: none;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}
.tzo-grade-tab:hover {
    background: var(--tzq-slate-100, #f1f5f9);
    color: var(--tzq-primary, #2563eb);
    border-color: var(--tzq-primary-light, #3b82f6);
    transform: translateY(-1px);
}
.tzo-grade-tab.active {
    background: linear-gradient(135deg, #256b60 0%, #1a4d45 100%) !important;
    color: #fff !important;
    box-shadow: var(--tzq-shadow-primary);
    scroll-margin-inline: 1rem;
    border-color: transparent !important;
}

/* Simple Grade Nav */
.tzq-grade-nav {
    display: flex;
    flex-wrap: wrap;
    gap: var(--tzq-spacing-2);
    padding: var(--tzq-spacing-1) 0;
}
.tzq-grade-nav__item {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--tzq-spacing-1) var(--tzq-spacing-3);
    border-radius: var(--tzq-spacing-xs);
    font-size: var(--tzq-text-xs);
    font-weight: var(--tzq-font-bold);
    background: var(--tzq-bg-secondary);
    color: var(--tzq-text-secondary);
    border: 1px solid var(--tzq-border-light);
    text-decoration: none;
    white-space: nowrap;
}
.tzq-grade-nav__item:hover {
    background: var(--tzq-primary-light, #dce4fb);
    color: var(--tzq-primary);
    border-color: var(--tzq-primary);
    text-decoration: none;
}
.tzq-grade-nav__item--active {
    background: var(--tzq-primary);
    color: var(--tzq-text-inverse);
    border-color: var(--tzq-primary);
}
.tzq-grade-nav__item--active:hover {
    background: var(--tzq-primary-dark);
    color: var(--tzq-text-inverse);
}