/* ==========================================================================
   GreenStar – Single Product Detail Stylesheet
   File: assets/css/single-product.css
   ========================================================================== */

/* --------------------------------------------------------------------------
   Breadcrumb Bar
   -------------------------------------------------------------------------- */
.gsp-breadcrumb-bar {
    background: var(--color-off-white);
    border-bottom: 1px solid var(--color-light-gray);
    padding: .85rem 0;
}
.gsp-breadcrumb {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: .35rem;
    font-size: var(--fs-sm);
    color: var(--color-text-light);
}
.gsp-breadcrumb a {
    color: var(--color-primary);
    transition: opacity var(--transition);
}
.gsp-breadcrumb a:hover { opacity: .75; }
.gsp-breadcrumb .sep { color: var(--color-mid-gray); }
.gsp-breadcrumb .current { color: var(--color-text); font-weight: 600; }

/* --------------------------------------------------------------------------
   Hero: Gallery + Info (two-column)
   -------------------------------------------------------------------------- */
.gsp-hero-section {
    padding: 3rem 0 4rem;
    background: var(--color-white);
}

.gsp-hero-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: flex-start;
}

/* Gallery */
.gsp-gallery { display: flex; flex-direction: column; gap: 1rem; }

.gsp-gallery__main {
    position: relative;
    background: var(--color-off-white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    aspect-ratio: 4/3; /* fallback before JS measures the actual photo, see single-product.js matchAspect() */
}
.gsp-gallery__main.can-zoom { cursor: zoom-in; }

.gsp-gallery__main-img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    display: block;
    transition: opacity .35s ease, transform .1s ease-out;
    transform-origin: 50% 50%;
}
.gsp-gallery__main-img.fade { opacity: 0; }
.gsp-gallery__main.zooming .gsp-gallery__main-img {
    transform: scale(2.2);
    transition: opacity .35s ease, transform .05s ease-out;
}

.gsp-gallery__nav {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 .75rem;
    pointer-events: none;
}
.gsp-gallery__arrow {
    pointer-events: all;
    width: 40px; height: 40px;
    border-radius: 50%;
    background: rgba(255,255,255,.9);
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    display: flex; align-items: center; justify-content: center;
    box-shadow: var(--shadow-sm);
    transition: background var(--transition), transform var(--transition), opacity var(--transition);
    color: var(--color-primary);
    line-height: 1;
    opacity: 0;
}
.gsp-gallery__main:hover .gsp-gallery__arrow { opacity: 1; }
.gsp-gallery__arrow:hover { background: var(--color-white); transform: scale(1.08); }

/* Touch devices have no hover — keep the arrows visible so they stay usable */
@media (hover: none) {
    .gsp-gallery__arrow { opacity: 1; }
}

.gsp-gallery__thumbs {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: .85rem;
}
.gsp-gallery__thumb {
    aspect-ratio: 1 / 1;
    border-radius: var(--radius-md);
    overflow: hidden;
    border: 2px solid transparent;
    cursor: pointer;
    background: var(--color-light-gray);
    box-shadow: var(--shadow-sm);
    opacity: .65;
    transition: all var(--transition);
}
.gsp-gallery__thumb img { width: 100%; height: 100%; object-fit: cover; display: block; }
.gsp-gallery__thumb:hover {
    opacity: 1;
    border-color: var(--color-primary-light);
    box-shadow: var(--shadow-md);
    transform: translateY(-4px);
}
.gsp-gallery__thumb.active {
    opacity: 1;
    border-color: var(--color-primary);
    box-shadow: var(--shadow-md);
}

/* Info Panel */
.gsp-info-panel {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

.gsp-category-badge {
    display: inline-flex;
    align-items: center;
    background: var(--color-light-gray);
    color: var(--color-primary);
    font-size: var(--fs-xs);
    font-weight: 700;
    letter-spacing: .1em;
    text-transform: uppercase;
    padding: .35rem .9rem;
    border-radius: var(--radius-pill);
    width: fit-content;
    transition: background var(--transition);
}
.gsp-category-badge:hover { background: rgba(45,122,45,.12); }

.gsp-product-title {
    font-family: var(--font-heading);
    font-size: clamp(1.6rem, 2.5vw, 2.25rem);
    font-weight: 700;
    color: var(--color-dark);
    line-height: var(--lh-tight);
    margin: 0;
}

.gsp-price-block {
    display: flex;
    align-items: baseline;
    gap: .5rem;
}
.gsp-price-label {
    font-size: var(--fs-sm);
    color: var(--color-text-light);
    font-weight: 600;
}
.gsp-price-value {
    font-size: var(--fs-xl);
    font-weight: 700;
    color: var(--color-primary);
}

.gsp-short-specs {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: .45rem;
    background: var(--color-off-white);
    border-radius: var(--radius-md);
    padding: 1rem 1.25rem;
    border-left: 3px solid var(--color-primary);
}
.gsp-short-specs li {
    font-size: var(--fs-sm);
    color: var(--color-text);
    line-height: 1.5;
    padding-left: 1rem;
    position: relative;
}
.gsp-short-specs li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: var(--color-primary);
    font-weight: 700;
}

.gsp-cta-group {
    display: flex;
    gap: .75rem;
    flex-wrap: wrap;
    align-items: center;
}
.gsp-btn-quote { flex: 1; justify-content: center; min-width: 0; }
.gsp-btn-sample { flex: 1; justify-content: center; min-width: 0; }

.gsp-cert-row {
    display: flex;
    align-items: flex-start;
    gap: .6rem;
    flex-wrap: wrap;
}
.gsp-cert-label {
    font-size: var(--fs-sm);
    font-weight: 600;
    color: var(--color-text-light);
    flex-shrink: 0;
    padding-top: .2rem;
}
.gsp-cert-chips { display: flex; gap: .4rem; flex-wrap: wrap; }
.gsp-cert-chip {
    display: inline-flex;
    align-items: center;
    background: rgba(45,122,45,.08);
    color: var(--color-primary-dark);
    border: 1px solid rgba(45,122,45,.2);
    border-radius: var(--radius-sm);
    font-size: var(--fs-xs);
    font-weight: 700;
    letter-spacing: .05em;
    padding: .2rem .65rem;
}

.gsp-share-row {
    display: flex;
    align-items: center;
    gap: .5rem;
    flex-wrap: wrap;
    padding-top: .5rem;
    border-top: 1px solid var(--color-light-gray);
}
.gsp-share-label { font-size: var(--fs-sm); color: var(--color-text-light); font-weight: 600; }
.gsp-share-btn {
    display: flex; align-items: center; justify-content: center;
    width: 32px; height: 32px;
    border-radius: 50%;
    transition: transform var(--transition), background var(--transition);
    color: var(--color-white);
}
.gsp-share-btn:hover { transform: translateY(-2px); }
.gsp-share-btn--fb  { background: #1877f2; }
.gsp-share-btn--tw  { background: #1da1f2; }
.gsp-share-btn--pt  { background: #e60023; }

/* --------------------------------------------------------------------------
   Tabs
   -------------------------------------------------------------------------- */
.gsp-tabs-section {
    padding: 2rem 0 4rem;
    background: var(--color-white);
    border-top: 1px solid var(--color-light-gray);
}

.gsp-tabs-card {
    border: 1px solid var(--color-light-gray);
    border-radius: var(--radius-md);
    overflow: hidden;
}

.gsp-tabs {
    display: flex;
    background: var(--color-off-white);
    border-bottom: 1px solid var(--color-light-gray);
    gap: 0;
}
.gsp-tab-btn {
    padding: .85rem 1.75rem;
    font-family: var(--font-heading);
    font-size: var(--fs-base);
    font-weight: 700;
    color: var(--color-text-light);
    border: none;
    border-right: 1px solid var(--color-light-gray);
    background: transparent;
    cursor: pointer;
    border-bottom: 2px solid transparent;
    margin-bottom: -1px;
    transition: color var(--transition), background var(--transition), border-color var(--transition);
    letter-spacing: .02em;
}
.gsp-tab-btn:hover { color: var(--color-primary); }
.gsp-tab-btn.active {
    color: var(--color-primary);
    background: var(--color-white);
    border-bottom-color: var(--color-primary);
}

.gsp-tab-panels { padding: 2rem; }
.gsp-tab-panel { display: block; }
.gsp-tab-panel[hidden] { display: none; }

.gsp-description-content {
    max-width: 800px;
    line-height: var(--lh-loose);
    color: var(--color-text);
}
.gsp-description-content h2 {
    font-family: var(--font-heading);
    font-size: var(--fs-xl);
    font-weight: 700;
    color: var(--color-primary-dark);
    margin-bottom: 1rem;
    line-height: var(--lh-tight);
}
.gsp-description-content p {
    margin-bottom: 1rem;
    font-size: var(--fs-md);
}

.gsp-splash-image {
    margin-top: 2.5rem;
    border-radius: var(--radius-lg);
    overflow: hidden;
}
.gsp-splash-image img { width: 100%; height: auto; display: block; }

/* Spec table */
.gsp-spec-table-wrap {
    overflow-x: auto;
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-light-gray);
}
.gsp-spec-table {
    width: 100%;
    border-collapse: collapse;
    font-size: var(--fs-sm);
}
.gsp-spec-table thead tr {
    background: var(--color-primary);
    color: var(--color-white);
}
.gsp-spec-table thead th {
    padding: .85rem 1.25rem;
    text-align: left;
    font-weight: 700;
    letter-spacing: .08em;
    text-transform: uppercase;
    font-size: var(--fs-xs);
}
.gsp-spec-table tbody tr { border-bottom: 1px solid var(--color-light-gray); }
.gsp-spec-table tbody tr:last-child { border-bottom: none; }
.gsp-spec-table tbody tr:nth-child(even) { background: var(--color-off-white); }
.gsp-spec-table tbody tr:hover { background: rgba(45,122,45,.04); }
.gsp-spec-table td { padding: .75rem 1.25rem; line-height: 1.5; }
.gsp-spec-table .spec-item {
    font-weight: 600;
    color: var(--color-text);
    width: 35%;
    white-space: nowrap;
}
.gsp-spec-table .spec-value { color: var(--color-text-light); }

/* --------------------------------------------------------------------------
   Manufacturing Process
   -------------------------------------------------------------------------- */
.gsp-process-section {
    padding: 5rem 0;
    background: var(--color-off-white);
    border-top: 1px solid var(--color-light-gray);
}
.gsp-section-header { margin-bottom: 3.5rem; }
.gsp-section-header .section-subtitle { margin: .75rem auto 0; }

.gsp-process-track {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2rem;
    position: relative;
}
.gsp-process-track::before {
    content: '';
    position: absolute;
    top: 2.85rem;
    left: calc(12.5% + 1rem);
    right: calc(12.5% + 1rem);
    height: 2px;
    background: linear-gradient(to right, var(--color-primary-light), var(--color-accent));
    z-index: 0;
}

.gsp-process-step {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: .75rem;
    position: relative;
    z-index: 1;
}
.gsp-process-step__num {
    position: absolute;
    top: -0.5rem;
    right: -0.25rem;
    font-size: var(--fs-xs);
    font-weight: 700;
    color: var(--color-primary);
    opacity: .5;
}
.gsp-process-step__icon {
    width: 64px; height: 64px;
    background: var(--color-white);
    border: 2px solid var(--color-light-gray);
    border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    color: var(--color-primary);
    box-shadow: var(--shadow-sm);
    transition: border-color var(--transition), box-shadow var(--transition), transform var(--transition);
    flex-shrink: 0;
}
.gsp-process-step__icon svg { width: 30px; height: 30px; }
.gsp-process-step:hover .gsp-process-step__icon {
    border-color: var(--color-primary);
    box-shadow: 0 4px 20px rgba(45,122,45,.2);
    transform: translateY(-4px);
}
.gsp-process-step__label {
    font-size: var(--fs-sm);
    font-weight: 700;
    color: var(--color-dark);
    line-height: 1.3;
}
.gsp-process-step__desc {
    font-size: var(--fs-xs);
    color: var(--color-text-light);
    line-height: 1.5;
}

/* --------------------------------------------------------------------------
   Applications
   -------------------------------------------------------------------------- */
.gsp-applications-section {
    padding: 5rem 0;
    background: var(--color-white);
}
.gsp-applications-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
    margin-top: 3rem;
}
.gsp-app-card {
    background: var(--color-off-white);
    border-radius: var(--radius-lg);
    padding: 2rem 1.5rem;
    text-align: center;
    border: 1px solid var(--color-light-gray);
    transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}
.gsp-app-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-md);
    border-color: rgba(45,122,45,.2);
}
.gsp-app-card__icon {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    display: block;
}
.gsp-app-card__title {
    font-family: var(--font-heading);
    font-size: var(--fs-base);
    font-weight: 700;
    color: var(--color-dark);
    margin-bottom: .5rem;
}
.gsp-app-card__desc {
    font-size: var(--fs-sm);
    color: var(--color-text-light);
    line-height: 1.6;
}

/* --------------------------------------------------------------------------
   Related Products
   -------------------------------------------------------------------------- */
.gsp-related-section {
    padding: 5rem 0;
    background: var(--color-off-white);
    border-top: 1px solid var(--color-light-gray);
}
.gsp-related-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
    margin-top: 3rem;
}

/* --------------------------------------------------------------------------
   Inquiry Form
   -------------------------------------------------------------------------- */
.gsp-inquiry-section {
    padding: 6rem 0;
    background: linear-gradient(135deg, #0f320f 0%, var(--color-primary-dark) 100%);
    color: var(--color-white);
}
.gsp-inquiry-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 5rem;
    align-items: center;
}
.gsp-inquiry-info .section-label { color: var(--color-accent); }
.gsp-inquiry-title {
    font-family: var(--font-heading);
    font-size: clamp(1.6rem, 2.2vw, 2.25rem);
    font-weight: 700;
    color: var(--color-white);
    line-height: var(--lh-tight);
    margin: .75rem 0 1rem;
}
.gsp-inquiry-desc {
    color: rgba(255,255,255,.75);
    font-size: var(--fs-md);
    line-height: var(--lh-loose);
    margin-bottom: 2rem;
}
.gsp-inquiry-contacts {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: .75rem;
}
.gsp-inquiry-contacts li {
    display: flex;
    align-items: center;
    gap: .75rem;
    font-size: var(--fs-base);
}
.gsp-inquiry-contact-icon { font-size: 1.1rem; }
.gsp-inquiry-contacts a {
    color: var(--color-accent);
    text-decoration: none;
    transition: opacity var(--transition);
}
.gsp-inquiry-contacts a:hover { opacity: .8; }

/* Form */
.gsp-inquiry-form-wrap {
    background: var(--color-white);
    border-radius: var(--radius-xl);
    padding: 2.5rem 2rem;
    box-shadow: var(--shadow-lg);
}
.gsp-inquiry-form { display: flex; flex-direction: column; gap: 1.25rem; }
.gsp-form-row { display: flex; gap: 1rem; }
.gsp-form-row--2col { gap: 1rem; }
.gsp-form-row--2col .gsp-form-field { flex: 1; min-width: 0; }
.gsp-form-field { display: flex; flex-direction: column; gap: .4rem; }
.gsp-form-field label {
    font-size: var(--fs-sm);
    font-weight: 600;
    color: var(--color-text);
}
.gsp-form-field input,
.gsp-form-field textarea,
.gsp-form-field select {
    border: 1.5px solid var(--color-light-gray);
    border-radius: var(--radius-md);
    padding: .7rem 1rem;
    font-size: var(--fs-sm);
    color: var(--color-text);
    background: var(--color-white);
    outline: none;
    transition: border-color var(--transition), box-shadow var(--transition);
    width: 100%;
}
.gsp-form-field input:focus,
.gsp-form-field textarea:focus {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(45,122,45,.1);
}
.gsp-form-field textarea { resize: vertical; min-height: 100px; }

.gsp-submit-btn {
    width: 100%;
    justify-content: center;
    gap: .6rem;
    padding: .9rem 2rem;
}
.gsp-btn-spinner {
    display: none;
    width: 16px; height: 16px;
    border: 2px solid rgba(255,255,255,.4);
    border-top-color: var(--color-white);
    border-radius: 50%;
    animation: spin .7s linear infinite;
}
.gsp-submit-btn.loading .gsp-btn-spinner { display: block; }
.gsp-submit-btn.loading .gsp-btn-text { display: none; }
@keyframes spin { to { transform: rotate(360deg); } }

.gsp-form-status {
    font-size: var(--fs-sm);
    padding: .75rem 1rem;
    border-radius: var(--radius-md);
    display: none;
    text-align: center;
}
.gsp-form-status.success {
    display: block;
    background: rgba(45,122,45,.08);
    color: var(--color-primary-dark);
    border: 1px solid rgba(45,122,45,.2);
}
.gsp-form-status.error {
    display: block;
    background: rgba(200,0,0,.06);
    color: #c00;
    border: 1px solid rgba(200,0,0,.15);
}

/* --------------------------------------------------------------------------
   Responsive
   -------------------------------------------------------------------------- */
@media (max-width: 1024px) {
    .gsp-hero-grid { grid-template-columns: 1fr 1fr; gap: 2.5rem; }
    .gsp-process-track { grid-template-columns: repeat(4, 1fr); gap: 1rem; }
    .gsp-process-track::before { display: none; }
    .gsp-applications-grid { grid-template-columns: repeat(2, 1fr); }
    .gsp-related-grid { grid-template-columns: repeat(2, 1fr); }
    .gsp-inquiry-grid { gap: 3rem; }
}

@media (max-width: 768px) {
    .gsp-hero-section { padding: 2rem 0 3rem; }
    .gsp-hero-grid { grid-template-columns: 1fr; gap: 2rem; }
    .gsp-gallery__main { aspect-ratio: 3/2; }
    .gsp-gallery__thumbs { grid-template-columns: repeat(4, 1fr); gap: .6rem; }
    .gsp-info-panel { gap: 1rem; }
    .gsp-btn-quote, .gsp-btn-sample { flex: 1 1 45%; }

    .gsp-tabs-section { padding: 1.5rem 0 3rem; }
    .gsp-tab-btn { padding: .7rem 1.2rem; font-size: var(--fs-sm); }

    .gsp-process-section { padding: 3.5rem 0; }
    .gsp-process-track { grid-template-columns: repeat(2, 1fr); gap: 1.5rem; }
    .gsp-section-header { margin-bottom: 2rem; }

    .gsp-applications-grid { grid-template-columns: repeat(2, 1fr); }
    .gsp-related-grid { grid-template-columns: repeat(2, 1fr); }

    .gsp-inquiry-grid { grid-template-columns: 1fr; gap: 2.5rem; }
    .gsp-inquiry-section { padding: 4rem 0; }
    .gsp-inquiry-form-wrap { padding: 1.75rem 1.25rem; }
}

@media (max-width: 480px) {
    .gsp-process-track { grid-template-columns: repeat(2, 1fr); }
    .gsp-applications-grid { grid-template-columns: 1fr 1fr; }
    .gsp-related-grid { grid-template-columns: 1fr 1fr; }
    .gsp-form-row--2col { flex-direction: column; }
    .gsp-cta-group { flex-direction: column; }
    .gsp-btn-quote, .gsp-btn-sample { flex: none; width: 100%; }
    .gsp-spec-table .spec-item { width: 45%; white-space: normal; }
}