/* ==========================================================================
   Main CSS — Core layout and component styles
   ========================================================================== */

/* ── Page Wrapper ── */
.nb-page-wrapper {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.nb-page-wrapper > main {
    flex: 1;
}

/* ── Grid System ── */
.nb-grid {
    display: grid;
    gap: var(--nb-space-lg);
}

.nb-grid-2 { grid-template-columns: repeat(2, 1fr); }
.nb-grid-3 { grid-template-columns: repeat(3, 1fr); }
.nb-grid-4 { grid-template-columns: repeat(4, 1fr); }
.nb-grid-5 { grid-template-columns: repeat(5, 1fr); }
.nb-grid-6 { grid-template-columns: repeat(6, 1fr); }

/* ── Carousel Base ── */
.nb-carousel-wrapper {
    position: relative;
    overflow: hidden;
}

.nb-carousel-track {
    display: flex;
    transition: transform var(--nb-transition-slow);
    gap: var(--nb-space-lg);
}

.nb-carousel-slide {
    flex: 0 0 auto;
}

.nb-carousel-btn {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 44px;
    height: 44px;
    border-radius: var(--nb-radius-full);
    background: var(--nb-white);
    border: 1px solid var(--nb-gray-200);
    color: var(--nb-gray-700);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    z-index: 10;
    transition: all var(--nb-transition-base);
    box-shadow: var(--nb-shadow-md);
}

.nb-carousel-btn:hover {
    background: var(--nb-primary);
    color: var(--nb-white);
    border-color: var(--nb-primary);
}

.nb-carousel-btn--prev { left: 10px; }
.nb-carousel-btn--next { right: 10px; }

/* ── Quick View Modal ── */
.nb-quickview-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.6);
    z-index: var(--nb-z-modal);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: all var(--nb-transition-base);
    backdrop-filter: blur(4px);
}

.nb-quickview-overlay.is-active {
    opacity: 1;
    visibility: visible;
}

.nb-quickview-modal {
    background: var(--nb-white);
    border-radius: var(--nb-radius-lg);
    max-width: 900px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
    display: grid;
    grid-template-columns: 1fr 1fr;
    transform: translateY(20px) scale(0.95);
    transition: transform var(--nb-transition-base);
    box-shadow: var(--nb-shadow-xl);
}

.nb-quickview-overlay.is-active .nb-quickview-modal {
    transform: translateY(0) scale(1);
}

.nb-quickview-image {
    padding: var(--nb-space-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--nb-gray-100);
    border-radius: var(--nb-radius-lg) 0 0 var(--nb-radius-lg);
}

.nb-quickview-image img {
    max-width: 100%;
    max-height: 400px;
    object-fit: contain;
}

.nb-quickview-content {
    padding: var(--nb-space-2xl);
    display: flex;
    flex-direction: column;
    gap: var(--nb-space-md);
}

.nb-quickview-close {
    position: absolute;
    top: var(--nb-space-md);
    right: var(--nb-space-md);
    background: var(--nb-white);
    border: none;
    width: 36px;
    height: 36px;
    border-radius: var(--nb-radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    box-shadow: var(--nb-shadow-sm);
    transition: all var(--nb-transition-fast);
}

.nb-quickview-close:hover {
    background: var(--nb-danger);
    color: var(--nb-white);
}

/* ── Page Content Area ── */
.nb-page-content {
    padding: var(--nb-space-3xl) 0;
}

/* ── Breadcrumbs ── */
.nb-breadcrumb {
    padding: var(--nb-space-md) 0;
    font-size: var(--nb-fs-sm);
    color: var(--nb-gray-500);
}

.nb-breadcrumb a {
    color: var(--nb-gray-500);
}

.nb-breadcrumb a:hover {
    color: var(--nb-primary);
}

.nb-breadcrumb-sep {
    margin: 0 var(--nb-space-sm);
    color: var(--nb-gray-300);
}

/* ── Back to Top ── */
.nb-back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 44px;
    height: 44px;
    background: var(--nb-primary);
    color: var(--nb-white);
    border: none;
    border-radius: var(--nb-radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: all var(--nb-transition-base);
    z-index: var(--nb-z-sticky);
    box-shadow: var(--nb-shadow-lg);
}

.nb-back-to-top.is-visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.nb-back-to-top:hover {
    background: var(--nb-primary-dark);
    transform: translateY(-3px);
}