/* product-detail.css — rich product-page layout on IGF design tokens.
   Scoped to product-detail.html; do not @import elsewhere. */
.video-embed { position: relative; padding-bottom: 56.25%; height: 0; overflow: hidden; }
.video-embed iframe { position: absolute; inset: 0; width: 100%; height: 100%; border: 0; }

/* ===== CTA band (dark) ===== */
.cta-band { background: var(--text-dark); color: #fff; padding: 80px 0; text-align: center; position: relative; overflow: hidden; }
.cta-band::before {
  content: ''; position: absolute; inset: 0;
  background: radial-gradient(700px 300px at 50% 0%, rgba(0,102,204,0.3), transparent 60%),
              radial-gradient(500px 260px at 80% 100%, rgba(245,158,11,0.22), transparent 55%);
}
.cta-band > .container { position: relative; z-index: 1; }
.cta-band h2 { color: #fff; font-size: clamp(30px, 4vw, 46px); margin-bottom: 14px; }
.cta-band p { color: rgba(255,255,255,0.78); font-size: 18px; max-width: 540px; margin: 0 auto 28px; }

/* ===== Technical specifications table ===== */
.spec-table { width: 100%; border-collapse: collapse; margin-top: 8px; }
.spec-table td { padding: 12px 0; border-bottom: 1px solid var(--border-color); font-size: 15px; vertical-align: top; }
.spec-table td:first-child { font-weight: 600; color: var(--text-dark); width: 42%; }
.spec-table td:last-child { color: var(--text-light); }

/* ---------- Related-product card (with Add to Quote) ---------- */
.pcard { display: flex; flex-direction: column; background: #fff; border: 1px solid var(--border-color); border-radius: var(--radius-lg); overflow: hidden; transition: transform .2s, box-shadow .2s; }
.pcard:hover { transform: translateY(-4px); box-shadow: 0 8px 24px rgba(16,24,40,0.10); }
.pcard-thumb { aspect-ratio: 4/3; display: flex; align-items: center; justify-content: center; background: linear-gradient(135deg, #F3F6F9 0%, #E7ECF1 100%); position: relative; padding: 18px; overflow: hidden; }
.pcard-thumb.is-logo { background: #fff; }
.pcard-thumb.is-logo img { max-height: 54px; width: auto; filter: grayscale(15%); opacity: .9; }
/* Absolute-position the product photo inside the 4/3 box so it stays contained
   and never forces the box to grow or overflow (fixes mobile "cut in half"). */
.pcard-thumb img.pcard-photo { position: absolute; inset: 18px; width: calc(100% - 36px); height: calc(100% - 36px); object-fit: contain; }
.pcard-brandtag { position: absolute; top: 12px; left: 12px; font-size: 11px; font-weight: 700; letter-spacing: .05em; text-transform: uppercase; color: var(--primary-blue); background: #fff; border: 1px solid var(--border-color); padding: 4px 9px; border-radius: 6px; }
.pcard-body { padding: 18px 18px 20px; display: flex; flex-direction: column; gap: 8px; flex-grow: 1; }
.pcard-cat { font-size: 11.5px; font-weight: 700; color: var(--accent-amber); text-transform: uppercase; letter-spacing: .05em; }
.pcard-body h3 { font-size: 17px; line-height: 1.25; }
.pcard-body h3 a:hover { color: var(--primary-blue); }
.pcard-vp { font-size: 13.5px; color: var(--text-light); flex-grow: 1; }
.pcard-tags { display: flex; flex-wrap: wrap; gap: 5px; margin-top: 2px; }
.tag-chip { font-size: 10.5px; font-weight: 600; color: var(--text-light); background: var(--surface-light); border: 1px solid var(--border-color); border-radius: 5px; padding: 3px 7px; letter-spacing: .02em; }
.tag-chip.is-approval { color: var(--primary-blue-dark); background: #EAF3FA; border-color: #CDE4F3; }
.pcard-actions { display: grid; grid-template-columns: 1fr auto; gap: 8px; margin-top: 14px; }
.pcard-actions .btn { padding: 10px 14px; font-size: 13.5px; width: 100%; }

/* ============================================================
   Product detail v2
   ============================================================ */
.breadcrumb-trail { padding: 20px 0 4px; font-size: 13.5px; color: var(--text-light); display: flex; flex-wrap: wrap; gap: 8px; align-items: center; }
.breadcrumb-trail a { color: var(--primary-blue); }
.breadcrumb-trail a:hover { text-decoration: underline; }
.breadcrumb-trail .sep { color: var(--secondary-gray-light); }
.breadcrumb-trail .current { color: var(--text-dark); font-weight: 600; }

.pd2-hero { display: grid; grid-template-columns: 1fr 1.05fr; gap: 44px; padding: 28px 0 8px; align-items: start; }
.pd2-media { position: sticky; top: 96px; }
.pd2-image { aspect-ratio: 4/3; border-radius: var(--radius-lg); background: #fff; border: 1px solid var(--border-color); display: flex; align-items: center; justify-content: center; padding: 28px; position: relative; overflow: hidden; }
.pd2-image img { position: absolute; inset: 28px; width: calc(100% - 56px); height: calc(100% - 56px); object-fit: contain; }
.pd2-image.is-logo { background: var(--surface-light); }
.pd2-image.is-logo img { position: static; inset: auto; width: auto; height: auto; max-height: 90px; opacity: .8; }
.pd2-brand { font-size: 13px; font-weight: 700; text-transform: uppercase; letter-spacing: .08em; color: var(--primary-blue); }
.pd2-info h1 { font-size: clamp(26px, 3.4vw, 40px); margin: 8px 0 14px; }
.pd2-lede { font-size: 17px; color: var(--text-light); margin-bottom: 18px; }
.pd2-badges { display: flex; flex-wrap: wrap; gap: 7px; margin-bottom: 22px; }
.approval-badge { font-size: 12px; font-weight: 700; color: var(--primary-blue-dark); background: #EAF3FA; border: 1px solid #CDE4F3; border-radius: 6px; padding: 5px 10px; letter-spacing: .02em; }
.pd2-cta { display: flex; gap: 12px; flex-wrap: wrap; margin-bottom: 22px; }
.pd2-avail { font-size: 13.5px; color: var(--text-light); background: var(--surface-light); border: 1px solid var(--border-color); border-left: 3px solid var(--primary-blue); border-radius: 8px; padding: 12px 14px; }

/* quick specs panel */
.pd2-quick { border: 1px solid var(--border-color); border-radius: var(--radius-lg); overflow: hidden; margin-top: 4px; }
.pd2-quick .qs-row { display: grid; grid-template-columns: 40% 60%; border-top: 1px solid var(--border-color); }
.pd2-quick .qs-row:first-child { border-top: 0; }
.pd2-quick .qs-k { padding: 12px 16px; font-size: 13.5px; font-weight: 600; color: var(--text-dark); background: var(--surface-light); }
.pd2-quick .qs-v { padding: 12px 16px; font-size: 13.5px; color: var(--text-light); }

/* product video */
.pd2-video { max-width: 820px; border-radius: var(--radius-lg); overflow: hidden; border: 1px solid var(--border-color); }

/* product tagline (hero) */
.pd2-tagline { font-family: var(--font-heading); font-weight: 700; font-size: clamp(18px, 2.2vw, 22px); color: var(--accent-amber); letter-spacing: -0.01em; margin-bottom: 12px; }

/* hero gas / blend picker (above Add to Quote) */
.pd2-gaspick { margin-bottom: 16px; }
.pd2-gaspick label { display: block; font-size: 13px; font-weight: 600; color: var(--text-dark); margin-bottom: 6px; }
.pd2-gaspick select { width: 100%; max-width: 440px; padding: 12px 13px; border: 1px solid var(--border-color); border-radius: 8px; font-family: var(--font-primary); font-size: 15px; background: #fff; color: var(--text-dark); cursor: pointer; }
.pd2-gaspick select:focus { outline: none; border-color: var(--primary-blue); box-shadow: 0 0 0 3px rgba(0,102,204,.12); }

/* product-specific selling blocks (cards + chips) */
.sell-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
.sell-card { background: var(--surface-white); border: 1px solid var(--border-color); border-radius: var(--radius-md); padding: 20px 22px; }
.pd2-sec.alt .sell-card { background: #fff; }
.sell-card h4 { font-size: 16px; margin-bottom: 6px; }
.sell-card p { font-size: 14px; color: var(--text-light); }
.sell-chips { display: flex; flex-wrap: wrap; gap: 10px; }
.sell-chip { font-family: var(--font-heading); font-weight: 700; font-size: 16px; color: var(--text-dark); background: var(--surface-white); border: 1px solid var(--border-color); border-radius: 10px; padding: 12px 20px; }
.pd2-sec.alt .sell-chip { background: #fff; }

/* section image (e.g. cylinder return program) */
.sell-figure { width: 100%; margin-bottom: 24px; border: 1px solid var(--border-color); border-radius: var(--radius-lg); overflow: hidden; background: #fff; }
.sell-figure img { width: 100%; height: auto; display: block; }

/* SDS download grid */
.dl-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px; }
.dl-card { display: flex; align-items: center; gap: 12px; background: #fff; border: 1px solid var(--border-color); border-radius: var(--radius-md); padding: 13px 16px; transition: border-color .15s, box-shadow .15s, transform .15s; }
.dl-card:hover { border-color: var(--primary-blue); box-shadow: 0 1px 3px rgba(16,24,40,0.08); transform: translateY(-2px); }
.dl-ic { font-size: 19px; flex-shrink: 0; }
.dl-meta { display: flex; flex-direction: column; min-width: 0; }
.dl-label { font-size: 14px; font-weight: 600; color: var(--text-dark); line-height: 1.3; }
.dl-sub { font-size: 12px; color: var(--text-light); }
.dl-arrow { margin-left: auto; color: var(--primary-blue); font-weight: 700; font-size: 16px; }

/* app store links */
.app-links { display: flex; flex-wrap: wrap; gap: 12px; }

@media (max-width: 640px) { .sell-grid { grid-template-columns: 1fr; } .dl-grid { grid-template-columns: 1fr; } }

/* generic detail section */
.pd2-sec { padding: 56px 0; border-top: 1px solid var(--border-color); }
.pd2-sec.alt { background: var(--surface-light); }
.pd2-sec h2 { font-size: clamp(24px, 3vw, 34px); margin-bottom: 8px; }
.pd2-sec .sec-sub { font-size: 16px; color: var(--text-light); margin-bottom: 28px; max-width: 640px; }

/* why choose bullets */
.benefit-list { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; margin-top: 24px; }
.benefit-item { display: flex; gap: 13px; align-items: flex-start; }
.benefit-item .bi-ic { width: 30px; height: 30px; flex-shrink: 0; border-radius: 8px; background: linear-gradient(135deg, var(--primary-blue) 0%, var(--primary-blue-dark) 100%); display: flex; align-items: center; justify-content: center; }
.benefit-item .bi-ic svg { width: 17px; height: 17px; stroke: #fff; }
.benefit-item p { font-size: 15px; color: var(--text-dark); }

/* application blocks */
.app-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
.app-block { display: flex; align-items: center; gap: 12px; background: #fff; border: 1px solid var(--border-color); border-radius: var(--radius-md); padding: 16px 18px; }
.app-block .app-ic { width: 38px; height: 38px; border-radius: 9px; background: var(--surface-light); border: 1px solid var(--border-color); display: flex; align-items: center; justify-content: center; flex-shrink: 0; }
.app-block .app-ic svg { width: 20px; height: 20px; stroke: var(--primary-blue); }
.app-block span { font-size: 14.5px; font-weight: 600; color: var(--text-dark); }
.pd2-sec.alt .app-block { background: var(--surface-white); }

/* related products (base grid; the source stylesheet defined this just outside
   the copied range but is required by product-detail.js and the 855-857 media
   block below, which overrides its column count) */
.related-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }

/* variant / configuration selector — no equivalent existed in the ported layout;
   product-detail.js (RPP Task 2) renders these classes for the part-number
   picker, so this is a net-new block written in IGF tokens rather than a port. */
.variant-selector { border: 1px solid var(--border-color); border-radius: var(--radius-lg); background: var(--surface-light); padding: 16px 18px; margin-bottom: 18px; }
.variant-label { font-size: 13px; font-weight: 600; color: var(--text-dark); margin-bottom: 10px; }
.variant-option { display: flex; align-items: center; gap: 10px; font-size: 14.5px; color: var(--text-dark); padding: 8px 0; cursor: pointer; }
.variant-option input[type="radio"] { accent-color: var(--primary-blue); width: 16px; height: 16px; flex-shrink: 0; }
.partnumber-display { font-size: 13px; color: var(--text-light); margin-top: 8px; padding-top: 10px; border-top: 1px solid var(--border-color); }
.partnumber-display span { font-weight: 600; color: var(--text-dark); }

@media (max-width: 900px) {
  .pd2-hero { grid-template-columns: 1fr; gap: 26px; }
  .pd2-media { position: static; }
  .benefit-list { grid-template-columns: 1fr; }
  .app-grid { grid-template-columns: repeat(2, 1fr); }
  .related-grid { grid-template-columns: repeat(2, 1fr); }
  .qp-grid { grid-template-columns: 1fr; }
}