/* หน้าวางแปลนรั้วนิรภัย (มติ 403) — ทุกกฎอยู่ใต้ .fence-builder จึงไม่รั่วไปหน้าอื่น */
.fence-builder { max-width: 1360px; margin: 0 auto; padding: 16px; display: grid; gap: 16px; }
.fence-builder .fb-heading { display: flex; align-items: center; justify-content: space-between; gap: 16px; }
.fence-builder .fb-heading h1 { margin: 0 0 6px; font-size: clamp(24px, 3.2vw, 34px); }
.fence-builder .fb-heading p { margin: 0 0 10px; color: #333; font-size: 16px; max-width: 70ch; }
.fence-builder .fb-mascot { flex: none; width: 120px; height: auto; }
.fence-builder .fb-lead-steps { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: 8px 18px; }
.fence-builder .fb-lead-steps li { display: inline-flex; align-items: center; gap: 8px; font-size: 18px; font-weight: 700; }
/* มติ 404 — เลขหัวข้อเป็นวงพื้นเหลือง */
.fence-builder .fb-no { display: inline-grid; place-items: center; flex: none; width: 30px; height: 30px; margin-right: 8px; border-radius: 50%; background: #ffd70a; color: #111; font-weight: 800; font-size: 16px; }
.fence-builder .fb-lead-steps .fb-no { margin-right: 0; }
.fence-builder .fb-card h2 { display: flex; align-items: center; flex-wrap: wrap; gap: 4px; }
/* มติ 404 — ซ้าย: สเปค + ชิ้นส่วน · ขวา: แปลน + ผลลัพธ์ ติดจอ */
.fence-builder .fb-layout { display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); gap: 16px; align-items: start; }
.fence-builder .fb-left, .fence-builder .fb-right { display: grid; gap: 16px; min-width: 0; }
/* มติ 406 — ไม่มีแถบเลื่อนในกล่อง (เดิมเลื่อนค้างกลางกล่องแล้วหัวข้อหาย) · ติดจอเฉพาะตอนกล่องซ้ายยาวกว่า */
.fence-builder .fb-right { position: sticky; top: 12px; }
@media (max-width: 960px) {
  .fence-builder .fb-layout { grid-template-columns: minmax(0, 1fr); }
  .fence-builder .fb-right { position: static; }
}
.fence-builder > * { min-width: 0; }
.fence-builder .fb-card { min-width: 0; background: #fff; border: 1px solid #e3e3e3; border-radius: 10px; padding: 16px; }
.fence-builder .fb-card h2 { margin: 0 0 12px; font-size: 19px; }
.fence-builder .fb-card h3 { margin: 0; font-size: 16px; }
.fence-builder .fb-config { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px; }
.fence-builder .fb-config .fb-span2 { grid-column: span 2; }   /* มติ 408 — แคลมป์ข้างสีเสา กว้างพอให้ชื่อเต็ม */
/* มติ 413 — สเปคแถวเดียวเต็มความกว้าง (5 ช่องในบรรทัดเดียว · แคลมป์กว้างกว่า) · จอแคบกลับเป็น 3 → 2 คอลัมน์ */
.fence-builder .fb-spec .fb-config { grid-template-columns: repeat(4, minmax(0, 1fr)) minmax(0, 2fr); }
.fence-builder .fb-spec .fb-config .fb-span2 { grid-column: auto; }
.fence-builder .fb-spec h2 { margin-bottom: 8px; }
@media (max-width: 960px) {
  .fence-builder .fb-spec .fb-config { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .fence-builder .fb-spec .fb-config .fb-span2 { grid-column: span 2; }
}
.fence-builder .fb-qty { display: grid; gap: 4px; font-size: 14px; font-weight: 600; margin-bottom: 12px; }
.fence-builder .fb-qty input { font: inherit; font-weight: 400; width: 110px; padding: 8px 10px; border: 1px solid #cfcfcf; border-radius: 8px; }
.fence-builder .fb-qty small { font-weight: 400; color: #666; }
.fence-builder .fb-slide-input { display: flex; flex-wrap: wrap; align-items: center; gap: 6px 10px; margin-top: 8px; font-size: 14px; }
.fence-builder .fb-slide-input input { width: 90px; font: inherit; padding: 6px 8px; border: 1px solid #cfcfcf; border-radius: 8px; }
.fence-builder .fb-slide-input small { flex-basis: 100%; }
.fence-builder .fb-err { color: #b91c1c; flex-basis: 100%; }
.fence-builder .fb-config label { display: grid; gap: 4px; font-size: 14px; font-weight: 600; }
/* มติ 406 — ช่องเลือกเตี้ยลง */
.fence-builder .fb-config select, .fence-builder .fb-config input { height: 38px; min-height: 0; font: inherit; font-size: 15px; font-weight: 400; padding: 4px 10px; border: 1px solid #cfcfcf; border-radius: 8px; background: #fff; min-width: 0; }

.fence-builder .fb-palette { display: grid; gap: 10px; }
.fence-builder .fb-pal-title { font-size: 13px; font-weight: 700; color: #444; margin-bottom: 4px; }
.fence-builder .fb-pal-row { display: flex; flex-wrap: wrap; gap: 6px; }
.fence-builder .fb-pal-item { display: inline-flex; flex-direction: column; align-items: center; gap: 4px; padding: 6px 8px; border: 1px solid #d6d6d6; border-radius: 8px; background: #fafafa; cursor: grab; font: inherit; font-size: 13px; }
.fence-builder .fb-pal-item:hover, .fence-builder .fb-pal-item:focus-visible { border-color: #f2c200; background: #fffbe6; }
.fence-builder .fb-pal-item.more { justify-content: center; }
.fence-builder .fb-muted { color: #888; font-size: 13px; }

.fence-builder .fb-bar { display: block; height: 20px; border-radius: 3px; background: repeating-linear-gradient(90deg, #231f20 0 2px, #555 2px 6px); border: 1px solid #231f20; }
.fence-builder .fb-bar.swing, .fence-builder .fb-bar.double { background: repeating-linear-gradient(90deg, #3a3a3a 0 2px, #777 2px 6px); outline: 2px dashed #d97706; outline-offset: 1px; }
.fence-builder .fb-bar.slide { background: #fff; border: 2px dashed #d97706; }

.fence-builder .fb-toolbar { display: flex; gap: 8px; margin: 12px 0 8px; flex-wrap: wrap; }
.fence-builder .fb-btn { display: inline-flex; align-items: center; justify-content: center; min-height: 40px; padding: 8px 14px; border: 1px solid #cfcfcf; border-radius: 8px; background: #fff; color: #222; font: inherit; font-size: 14px; text-decoration: none; cursor: pointer; }
.fence-builder .fb-btn:hover { border-color: #999; }
.fence-builder .fb-primary { background: #06c755; border-color: #06c755; color: #fff; font-weight: 700; }
.fence-builder .fb-primary:hover { background: #05a948; }

.fence-builder .fb-strip { display: flex; align-items: flex-end; gap: 0; min-height: 96px; padding: 12px; border: 2px dashed #d6d6d6; border-radius: 10px; background: #fcfcfc; overflow-x: auto; }
.fence-builder .fb-empty { margin: auto; color: #888; }
.fence-builder .fb-post { flex: none; width: 8px; height: 60px; border: 1px solid #333; border-radius: 2px; margin-bottom: 22px; }
.fence-builder .fb-piece { position: relative; flex: none; display: flex; flex-direction: column; align-items: center; gap: 4px; padding: 0 2px; cursor: grab; }
.fence-builder .fb-piece .fb-bar { height: 52px; }
.fence-builder .fb-piece.bad .fb-bar, .fence-builder .fb-piece.bad .fb-box { outline: 3px solid #dc2626; }
.fence-builder .fb-box { width: 40px; height: 52px; display: grid; place-items: center; border: 1px solid #d97706; border-radius: 6px; background: #fff7ed; color: #d97706; font-size: 20px; }
.fence-builder .fb-wl { font-size: 12px; white-space: nowrap; color: #333; }
.fence-builder .fb-tools { position: absolute; top: -6px; left: 50%; transform: translate(-50%, -100%); display: flex; gap: 2px; background: #fff; border: 1px solid #ccc; border-radius: 6px; padding: 2px; z-index: 2; box-shadow: 0 2px 6px rgba(0,0,0,.12); }
.fence-builder .fb-piece { border-radius: 6px; }
.fence-builder .fb-piece.sel { background: #fff3b7; outline: 2px solid #f2c200; }
.fence-builder .fb-piece:focus-visible { outline: 2px solid #1d4ed8; }
.fence-builder .fb-tb { min-width: 28px; min-height: 28px; border: 0; background: none; cursor: pointer; font-size: 13px; border-radius: 4px; }
.fence-builder .fb-tb:hover, .fence-builder .fb-tb:focus-visible { background: #f2f2f2; }
.fence-builder .fb-strip { padding-top: 44px; }

.fence-builder .fb-length { margin: 8px 0; font-weight: 700; }
.fence-builder .fb-plan { margin-top: 12px; }
.fence-builder .fb-plan-head { display: flex; justify-content: space-between; align-items: center; gap: 8px; flex-wrap: wrap; }
.fence-builder .fb-plan-head h2 { margin: 0; }
.fence-builder .fb-plan-head .fb-toolbar { margin: 0; }
.fence-builder .fb-plan-foot { display: flex; justify-content: space-between; align-items: center; gap: 8px; flex-wrap: wrap; margin-top: 8px; }
.fence-builder .fb-busy { font-size: 13px; font-weight: 400; color: #92400e; background: #fff7ed; border-radius: 999px; padding: 2px 10px; }
.fence-builder .fb-unpriced { font-size: 12px; font-weight: 400; color: #9a3412; }
.fence-builder .fb-primary.is-busy { opacity: .55; pointer-events: none; }
.fence-builder button:disabled { opacity: .55; cursor: default; }
.fence-builder .fb-svg { overflow-x: auto; border: 1px solid #eee; border-radius: 8px; min-height: 40px; }
.fence-builder .fb-svg svg { max-width: 100%; max-height: 340px; width: auto; height: auto; display: block; margin: 0 auto; }

.fence-builder .fb-metrics { display: grid; grid-template-columns: repeat(auto-fill, minmax(120px, 1fr)); gap: 8px; margin-bottom: 12px; }
.fence-builder .fb-metric { border: 1px solid #eee; border-radius: 8px; padding: 10px; display: grid; gap: 2px; }
.fence-builder .fb-metric b { font-size: 22px; }
.fence-builder .fb-metric span { font-size: 13px; color: #666; }
.fence-builder .fb-table-wrap { overflow-x: auto; }
.fence-builder .fb-bom { width: 100%; border-collapse: collapse; font-size: 14px; }
.fence-builder .fb-bom th, .fence-builder .fb-bom td { padding: 8px; border-bottom: 1px solid #eee; text-align: left; vertical-align: top; }
.fence-builder .fb-bom .r { text-align: right; white-space: nowrap; }
.fence-builder .fb-bom .b { font-weight: 700; }
.fence-builder .fb-bom .sku { white-space: nowrap; color: #555; }
.fence-builder .fb-bom tfoot tr.grand td { font-size: 16px; }
.fence-builder .fb-note { font-size: 13px; color: #666; margin: 8px 0; }
.fence-builder .fb-warn { color: #9a3412; background: #fff7ed; border-left: 3px solid #d97706; padding: 8px 10px; border-radius: 4px; }
.fence-builder .fb-cta { margin-top: 16px; padding-top: 16px; border-top: 1px solid #eee; }
.fence-builder .fb-cta-row { display: flex; gap: 8px; flex-wrap: wrap; }
/* มติ 408 — เซฟเข้าโปรเจค */
.fence-builder .fb-save-form { display: flex; flex-wrap: wrap; align-items: flex-end; gap: 8px 10px; }
.fence-builder .fb-save-form label { display: grid; gap: 4px; font-size: 14px; font-weight: 600; min-width: 0; }
.fence-builder .fb-save-form label[hidden] { display: none; }
.fence-builder .fb-save-form select, .fence-builder .fb-save-form input[type=text] { height: 40px; font: inherit; font-size: 15px; font-weight: 400; padding: 4px 10px; border: 1px solid #cfcfcf; border-radius: 8px; background: #fff; max-width: 100%; }
.fence-builder .fb-save-btn { background: #ffd70a; border-color: #e0bb00; color: #111; font-weight: 700; }
.fence-builder .fb-save-btn:hover { background: #f2c200; }

/* มติ 409 — เริ่มจากรูปทรง (ธีมเหลือง–ดำ–ขาว–เทา · ไม่มีภาพใหญ่) */
.fence-builder .fb-shape { display: grid; gap: 8px; padding-bottom: 14px; margin-bottom: 14px; border-bottom: 1px solid #eee; }
.fence-builder .fb-shape .fb-note { margin: 0; }
.fence-builder .fb-shapes { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 8px; }
.fence-builder .fb-shape-card { display: grid; justify-items: center; gap: 4px; padding: 8px 4px; border: 1px solid #d6d6d6; border-radius: 8px; background: #fff; color: #222; font: inherit; font-size: 14px; font-weight: 600; cursor: pointer; min-width: 0; }
.fence-builder .fb-shape-card svg { width: 72px; height: auto; }
.fence-builder .fb-shape-card:hover, .fence-builder .fb-shape-card:focus-visible { border-color: #f2c200; }
.fence-builder .fb-shape-card[aria-pressed="true"] { border: 2px solid #f2c200; background: #fffbe6; padding: 7px 3px; }
.fence-builder .fb-sl { fill: none; stroke: #231f20; stroke-width: 4; stroke-linejoin: round; }
.fence-builder .fb-sp { fill: #ffd70a; stroke: #231f20; stroke-width: 1.2; }
.fence-builder .fb-st { font: 700 12px sans-serif; fill: #1d4ed8; text-anchor: middle; }
.fence-builder .fb-linkbtn { justify-self: start; border: 0; background: none; padding: 2px 0; color: #444; font: inherit; font-size: 14px; text-decoration: underline; cursor: pointer; }
.fence-builder .fb-shape-form { display: grid; gap: 10px; padding: 12px; border: 1px solid #eee; border-radius: 8px; background: #fafafa; }
.fence-builder .fb-shape-form[hidden], .fence-builder .fb-dims[hidden] { display: none; }
.fence-builder .fb-dims { display: grid; gap: 10px; }
.fence-builder .fb-dim > label { display: grid; gap: 4px; font-size: 14px; font-weight: 600; }
.fence-builder .fb-dim-in { display: inline-flex; align-items: center; gap: 6px; font-weight: 400; }
.fence-builder .fb-dim-in input { width: 120px; height: 38px; font: inherit; font-size: 15px; padding: 4px 10px; border: 1px solid #cfcfcf; border-radius: 8px; background: #fff; }
.fence-builder .fb-dim-in input[aria-invalid="true"] { border-color: #b91c1c; }
.fence-builder .fb-fit { font-size: 13px; margin-top: 4px; min-height: 1.5em; }   /* มติ 416 — จองบรรทัดผลจัดขนาดไว้ ปุ่มสร้างไม่กระโดดตอนผลมา */
.fence-builder .fb-fit-ok { color: #166534; }
.fence-builder .fb-picks { display: grid; gap: 4px; padding: 8px; border-left: 3px solid #d97706; background: #fff7ed; border-radius: 4px; }
.fence-builder .fb-pick-title { font-weight: 700; color: #9a3412; }
.fence-builder .fb-pick { display: flex; align-items: flex-start; gap: 6px; cursor: pointer; }
.fence-builder .fb-pick input { flex: none; width: auto; height: auto; margin: 3px 0 0; }
.fence-builder .fb-build-row { display: flex; flex-wrap: wrap; align-items: center; gap: 6px 10px; }
.fence-builder .fb-build { background: #ffd70a; border-color: #e0bb00; color: #111; font-weight: 700; }
.fence-builder .fb-want { margin: 4px 0 8px; padding: 10px 12px; border: 1px solid #e3e3e3; border-radius: 8px; font-size: 14px; }
.fence-builder .fb-want[hidden] { display: none; }
.fence-builder .fb-want-title { font-weight: 700; margin-bottom: 4px; }
.fence-builder .fb-want-list { list-style: none; margin: 0; padding: 0; display: grid; gap: 2px; }
.fence-builder .fb-want-list .ok b { color: #166534; }
.fence-builder .fb-want-list .diff b { color: #9a3412; }
.fence-builder .fb-want-pending { margin-top: 8px; padding: 8px 10px; background: #fff7ed; border-left: 3px solid #d97706; border-radius: 4px; display: flex; flex-wrap: wrap; gap: 8px; align-items: center; }
.fence-builder .fb-want-pending p { margin: 0; flex-basis: 100%; color: #9a3412; }
.fence-builder .fb-want-accept { background: #ffd70a; border-color: #e0bb00; font-weight: 700; }
/* มติ 414 — แท็บ แปลน / ภาพมุมเฉียง */
.fence-builder .fb-view-tabs { display: flex; gap: 4px; border-bottom: 2px solid #eee; margin-bottom: 8px; }
.fence-builder .fb-view-tabs button { border: 0; border-bottom: 3px solid transparent; margin-bottom: -2px; background: none; padding: 6px 12px; font: inherit; font-size: 14px; font-weight: 700; color: #666; cursor: pointer; }
.fence-builder .fb-view-tabs button[aria-selected="true"] { color: #111; border-bottom-color: #ffd70a; }
.fence-builder .fb-iso[hidden], .fence-builder .fb-svg[hidden] { display: none; }
.fence-builder .fb-iso { padding: 8px; text-align: center; }
.fence-builder .fb-iso svg { max-width: 100%; max-height: 420px; width: auto; height: auto; display: block; margin: 0 auto; }
.fence-builder .fb-iso-msg { margin: 16px 8px; }

/* มติ 410 — ตัวอย่างสำเร็จ · แท็บคู่กับรูปทรง */
.fence-builder .fb-start-tabs { display: flex; gap: 4px; border-bottom: 2px solid #eee; margin-bottom: 10px; }
.fence-builder .fb-start-tabs button { border: 0; border-bottom: 3px solid transparent; margin-bottom: -2px; background: none; padding: 8px 12px; font: inherit; font-size: 15px; font-weight: 700; color: #666; cursor: pointer; }
.fence-builder .fb-start-tabs button[aria-selected="true"] { color: #111; border-bottom-color: #ffd70a; }
.fence-builder .fb-examples[hidden], .fence-builder .fb-shape[hidden] { display: none; }
.fence-builder .fb-examples { display: grid; gap: 8px; padding-bottom: 14px; margin-bottom: 14px; border-bottom: 1px solid #eee; }
.fence-builder .fb-examples h3, .fence-builder .fb-examples .fb-note { margin: 0; }
.fence-builder .fb-ex-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 8px; }
.fence-builder .fb-ex-card { display: grid; justify-items: center; align-content: start; gap: 2px; padding: 8px 6px; border: 1px solid #d6d6d6; border-radius: 8px; background: #fff; color: #222; font: inherit; font-size: 13px; text-align: center; cursor: pointer; min-width: 0; }
.fence-builder .fb-ex-card:hover, .fence-builder .fb-ex-card:focus-visible { border-color: #f2c200; background: #fffbe6; }
.fence-builder .fb-ex-card svg { width: 60px; height: auto; }
.fence-builder .fb-ex-card b { font-size: 14px; }
.fence-builder .fb-ex-size { font-weight: 700; color: #1d4ed8; }
.fence-builder .fb-ex-note { color: #666; font-size: 12px; }
.fence-builder .fb-ex-price { font-weight: 700; color: #111; background: #ffd70a; border-radius: 999px; padding: 1px 8px; margin-top: 2px; font-size: 12px; }
@media (max-width: 600px) {
  .fence-builder .fb-shapes { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .fence-builder .fb-ex-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 600px) {
  .fence-builder { padding: 12px; }
  .fence-builder .fb-card { padding: 12px; }
}
@media (max-width: 600px) {
  .fence-builder .fb-mascot { width: 76px; }
  .fence-builder .fb-lead-steps li { font-size: 15px; }
}
@media (max-width: 600px) {
  .fence-builder .fb-config, .fence-builder .fb-spec .fb-config { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .fence-builder .fb-config .fb-span2, .fence-builder .fb-spec .fb-config .fb-span2 { grid-column: 1 / -1; }
}