/* Design Tool page */
.dt-hero{padding:calc(var(--nav-h) + 36px) 0 28px;background:var(--bg)}
.dt-hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:48px;align-items:center}
.dt-kicker{display:inline-flex;align-items:center;gap:8px;font-size:12px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--gray);margin-bottom:18px}
.dt-kicker i{width:6px;height:6px;border-radius:50%;background:var(--orange);display:inline-block}
.dt-hero h1{font-size:clamp(36px,4.6vw,56px);font-weight:800;letter-spacing:-.035em;line-height:1.05;margin:0 0 16px}
.dt-hero .lede{font-size:17px;line-height:1.55;color:var(--gray);max-width:540px;margin-bottom:22px}
.dt-proof{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:26px}
.dt-proof span{font-size:12px;font-weight:600;color:var(--ink-2);background:#fff;border:1px solid var(--line);border-radius:999px;padding:7px 12px}
.dt-hero-actions{display:flex;flex-wrap:wrap;gap:10px}
.dt-hero-photo{position:relative;border-radius:28px;overflow:hidden;background:#ececef;aspect-ratio:4/3;box-shadow:var(--shadow-card)}
.dt-hero-photo img{width:100%;height:100%;object-fit:cover;display:block}
.dt-hero-photo figcaption{position:absolute;left:16px;bottom:16px;background:rgba(255,255,255,.92);backdrop-filter:blur(8px);border-radius:999px;padding:7px 12px;font-size:11px;font-weight:600;color:var(--ink-2)}
.studio{padding:28px 0 80px}
.studio-head{margin-bottom:26px}
.studio-head .sec-lead{max-width:680px}
/* --- source tabs --- */
.src-tabs{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-bottom:16px}
.src-tab{appearance:none;background:#fff;border:1.5px solid var(--line-2);border-radius:16px;padding:16px 18px;cursor:pointer;font-family:inherit;text-align:left;transition:all .2s var(--ease)}
.src-tab b{display:block;font-size:14px;font-weight:700;color:var(--ink);letter-spacing:-.01em}
.src-tab small{display:block;margin-top:3px;font-size:12px;color:var(--gray);font-weight:500}
.src-tab:hover{border-color:var(--orange)}
.src-tab.active{border-color:var(--orange);background:var(--accent-soft)}
.src-tab.active b{color:var(--orange)}
.shoe-upload{display:block;border:1.5px dashed var(--line-2);border-radius:18px;background:#fff;padding:34px 20px;text-align:center;cursor:pointer;transition:all .2s}
.shoe-upload:hover,.shoe-upload.drag{border-color:var(--orange);background:var(--accent-soft)}
.shoe-upload input{display:none}
.shoe-upload-inner b{display:block;font-size:15px;font-weight:700;color:var(--ink)}
.shoe-upload-inner small{display:block;margin-top:6px;font-size:12px;color:var(--gray)}
.shoe-upload img{max-width:320px;max-height:280px;margin:0 auto;border-radius:14px;box-shadow:var(--shadow-card)}
.concept-input{width:100%;padding:14px 16px;border:1.5px solid var(--line-2);border-radius:14px;font-family:inherit;font-size:14px;line-height:1.5;color:var(--ink);background:#fff;resize:vertical}
.concept-input:focus{outline:none;border-color:var(--orange);box-shadow:0 0 0 3px rgba(255,87,34,.14)}
.base-strip{display:grid;grid-template-columns:repeat(9,1fr);gap:10px}
.base-card{appearance:none;background:#fff;border:1px solid var(--line);border-radius:16px;padding:10px 8px 12px;cursor:pointer;text-align:center;font-family:inherit;text-decoration:none;display:block;transition:border-color .25s var(--ease),box-shadow .25s var(--ease),transform .25s var(--ease)}
.base-card:hover{border-color:transparent;box-shadow:var(--shadow-card);transform:translateY(-2px)}
.base-card.active{border-color:var(--orange);background:var(--accent-soft);box-shadow:none}
.base-thumb{display:block;width:100%;aspect-ratio:1;border-radius:12px;overflow:hidden;background:#f2f2f4;margin-bottom:8px}
.base-thumb img{width:100%;height:100%;object-fit:cover;display:block}
.base-more .base-thumb{display:flex;align-items:center;justify-content:center;background:linear-gradient(180deg,#fff 0%,#f2f2f4 100%)}
.base-more .base-thumb b{font-size:26px;font-weight:800;color:var(--orange);letter-spacing:-.02em}
.base-card b{display:block;font-size:12px;font-weight:700;color:var(--ink);letter-spacing:-.01em}
.base-card small{display:block;margin-top:2px;font-size:10px;color:var(--gray);font-weight:500}
.studio-grid{display:grid;grid-template-columns:300px minmax(0,1fr) 300px;gap:20px;align-items:start}
.panel,.brief-card,.preview-stage{background:#fff;border:1px solid var(--line);border-radius:22px;box-shadow:var(--shadow-card)}
.panel{padding:22px}
.panel-title{font-size:11px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--gray);margin-bottom:18px;display:flex;align-items:center;gap:8px}
.panel-title::before{content:"";width:3px;height:12px;background:var(--orange);border-radius:2px}
.option-group{margin-bottom:20px}
.option-group:last-child{margin-bottom:0}
.option-group h5{font-size:11px;font-weight:700;letter-spacing:.06em;text-transform:uppercase;color:var(--ink-2);margin-bottom:10px}
.material-grid{display:grid;grid-template-columns:1fr 1fr;gap:6px}
.material-chip{appearance:none;background:#fff;border:1.5px solid var(--line-2);border-radius:10px;padding:10px 10px;cursor:pointer;font-family:inherit;font-size:11px;font-weight:600;color:var(--ink-2);text-align:center;transition:all .2s var(--ease)}
.material-chip:hover{border-color:var(--orange)}
.material-chip.active{border-color:var(--orange);background:var(--accent-soft);color:var(--orange)}
.part-tabs{display:grid;grid-template-columns:repeat(5,1fr);gap:6px;margin-bottom:10px}
.part-tab{appearance:none;background:#fff;border:1.5px solid var(--line-2);border-radius:10px;padding:9px 4px;cursor:pointer;font-family:inherit;font-size:11px;font-weight:600;color:var(--ink-2);text-align:center;transition:all .2s var(--ease)}
.part-tab:hover{border-color:var(--orange)}
.part-tab.active{border-color:var(--orange);background:var(--accent-soft);color:var(--orange)}
.part-tab.taken{border-color:rgba(255,87,34,.45)}
.color-grid{display:grid;grid-template-columns:repeat(7,1fr);gap:7px}
.color-swatch{appearance:none;aspect-ratio:1;border-radius:8px;border:2px solid transparent;cursor:pointer;padding:0;font-size:9px;font-weight:700;color:var(--ink-2);font-family:inherit;line-height:1}
.color-swatch.active{border-color:var(--ink);box-shadow:0 0 0 2px #fff,0 0 0 4px var(--orange)}
.color-meta{display:flex;justify-content:space-between;align-items:center;margin-top:8px;font-size:11px;color:var(--gray)}
.pantone-row input{width:100%;padding:8px 10px;border:1px solid var(--line-2);border-radius:8px;font-family:inherit;font-size:12px;background:#fbfbfd;margin-top:2px}
.pantone-row input:focus,.df-field input:focus,.df-field select:focus,.df-field textarea:focus{outline:none;border-color:var(--orange);box-shadow:0 0 0 3px rgba(255,87,34,.14);background:#fff}
.pantone-hint{font-size:11px;color:var(--gray-2);margin-top:6px;line-height:1.45}
.logo-upload{display:block;border:1.5px dashed var(--line-2);border-radius:12px;padding:16px;text-align:center;cursor:pointer;font-size:12px;color:var(--gray);transition:all .2s}
.logo-upload:hover,.logo-upload.drag{border-color:var(--orange);background:var(--accent-soft)}
.logo-upload input{display:none}
.logo-upload img{max-width:72px;max-height:36px;margin:8px auto 0;display:none}
.preview-stage{padding:16px 16px 14px;display:flex;flex-direction:column;gap:10px}
.preview-bar{display:flex;justify-content:space-between;align-items:center;gap:12px;margin-bottom:8px}
.preview-bar strong{font-size:13px}
.preview-bar span{color:var(--gray);font-size:12px}
.view-toggle{display:flex;background:var(--bg);border-radius:10px;padding:3px}
.stage-tab{appearance:none;border:none;background:transparent;padding:6px 14px;border-radius:8px;font-family:inherit;font-size:12px;font-weight:600;color:var(--gray);cursor:pointer}
.stage-tab.active{background:#fff;color:var(--ink);box-shadow:0 1px 3px rgba(0,0,0,.08)}
.stage-tab:disabled{opacity:.45;cursor:not-allowed}
.base-link{font-size:11px;font-weight:600;color:var(--ink-2);text-decoration:none;padding:6px 10px;border-radius:8px}
.base-link:hover{background:#fff;color:var(--orange)}
.preview-canvas{background:linear-gradient(180deg,#f7f7f8 0%,#eef0f2 100%);border-radius:16px;padding:10px}
.stage{position:relative;width:100%;aspect-ratio:1/1;border-radius:12px;overflow:hidden;background:#f2f2f4}
.stage-photo{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;display:block}
.stage-live{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;display:block}
.stage-live[hidden]{display:none}
.live-chip{margin:10px 0 0;padding:10px 14px;border-radius:12px;background:var(--accent-soft);border:1px solid rgba(255,87,34,.22);color:var(--ink-2);font-size:12.5px;font-weight:600;display:flex;align-items:center;gap:8px}
.live-chip[hidden]{display:none}
.live-chip i{width:7px;height:7px;border-radius:50%;background:var(--orange);flex:none;animation:dtpulse 1.4s ease-in-out infinite}
.live-chip.on{background:#eef7f0;border-color:rgba(31,141,74,.28);color:#1a6b3c}
.live-chip.on i{background:#1f8d4a;animation:none}
.live-chip.warn{background:#f6f6f7;border-color:var(--line-2);color:var(--gray)}
.live-chip.warn i{background:#b7b7bd;animation:none}
@keyframes dtpulse{0%,100%{opacity:.35}50%{opacity:1}}
.stage-render{position:absolute;inset:0;background:#fff}
.stage-render img{width:100%;height:100%;object-fit:contain;display:block}
.stage-busy{position:absolute;inset:0;background:rgba(247,247,248,.94);backdrop-filter:blur(6px);display:flex;flex-direction:column;align-items:center;justify-content:center;gap:10px;text-align:center;padding:24px}
.stage-busy[hidden]{display:none}
.stage-busy b{font-size:15px;color:var(--ink)}
.stage-busy span{font-size:12px;color:var(--gray)}
.spinner{width:34px;height:34px;border-radius:50%;border:3px solid rgba(255,87,34,.2);border-top-color:var(--orange);animation:dtspin .8s linear infinite}
@keyframes dtspin{to{transform:rotate(360deg)}}
.stage-logo{position:absolute;transform:translate(-50%,-50%);background:rgba(255,255,255,.82);border:1.5px dashed rgba(29,29,31,.4);border-radius:8px;padding:3px 8px;display:flex;align-items:center;justify-content:center;max-width:120px;cursor:grab;touch-action:none;user-select:none;-webkit-user-select:none}
.stage-logo img{max-width:96px;max-height:26px;display:block}
.render-bar{display:flex;gap:8px}
.btn-render{flex:2;background:var(--orange);color:#fff;border:none;padding:13px 14px;border-radius:12px;font-weight:700;font-size:14px;cursor:pointer;font-family:inherit;transition:background .2s}
.btn-render:hover{background:var(--orange-d)}
.btn-render:disabled{opacity:.55;cursor:wait}
.btn-explode{flex:1;background:#fff;color:var(--ink-2);border:1px solid var(--line-2);padding:13px 12px;border-radius:12px;font-weight:600;font-size:12px;cursor:pointer;font-family:inherit}
.btn-explode:hover{border-color:var(--orange);color:var(--orange)}
.btn-explode:disabled{opacity:.55;cursor:wait}
.render-history{display:flex;gap:8px;overflow-x:auto;padding:2px}
.render-history[hidden]{display:none}
.render-history button{appearance:none;border:1.5px solid var(--line-2);border-radius:10px;overflow:hidden;padding:0;width:56px;height:56px;flex:0 0 auto;cursor:pointer;background:#fff}
.render-history button.active{border-color:var(--orange);box-shadow:0 0 0 2px #fff,0 0 0 4px var(--orange)}
.render-history img{width:100%;height:100%;object-fit:cover;display:block}
.spec-readout{font-size:11px;color:var(--gray);line-height:1.45;margin-top:8px;min-height:2.8em}
.preview-note{font-size:11px;color:var(--gray-2);margin-top:6px}
.brief-card{padding:22px;position:sticky;top:72px}
.brief-card h4{font-size:14px;font-weight:700;margin-bottom:14px}
.brief-meter{height:4px;background:var(--bg-3);border-radius:99px;overflow:hidden;margin:8px 0 14px}
.brief-meter b{display:block;height:100%;width:40%;background:var(--orange);border-radius:99px;transition:width .3s var(--ease)}
.brief-score{font-size:12px;color:var(--gray);margin-bottom:12px}
.est-row{display:flex;justify-content:space-between;gap:12px;padding:8px 0;border-bottom:1px solid var(--line);font-size:12px;color:var(--gray)}
.est-row strong{color:var(--ink);font-weight:600;text-align:right}
.brief-missing{list-style:none;margin:14px 0 0;padding:0;display:flex;flex-direction:column;gap:8px}
.brief-missing li{font-size:12px;color:var(--gray);line-height:1.45;padding-left:14px;position:relative}
.brief-missing li::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--orange);position:absolute;left:0;top:7px}
.brief-missing li.ok::before{background:var(--green)}
.action-buttons{display:flex;flex-direction:column;gap:8px;margin-top:18px}
.btn-save,.btn-reset{background:#fff;color:var(--ink);border:1px solid var(--line-2);padding:11px 14px;border-radius:10px;font-weight:600;font-size:13px;cursor:pointer;font-family:inherit}
.btn-save:hover,.btn-reset:hover{background:var(--bg)}
.btn-save:disabled{opacity:.5;cursor:not-allowed}
.btn-submit{background:var(--orange);color:#fff;border:none;padding:12px 14px;border-radius:10px;font-weight:700;font-size:14px;cursor:pointer;font-family:inherit}
.btn-submit:hover{background:var(--orange-d)}
.terms-note{margin-top:14px;font-size:11px;color:var(--gray-2);line-height:1.5}
.devflow{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-top:36px}
.devflow-step{background:#fff;border:1px solid var(--line);border-radius:16px;padding:20px 18px}
.devflow-step b{display:block;font-size:11px;font-weight:700;letter-spacing:.1em;color:var(--orange);margin-bottom:7px}
.devflow-step h6{font-size:14px;font-weight:700;margin-bottom:6px}
.devflow-step p{font-size:12px;line-height:1.55;color:var(--gray)}
#submitModal{display:none;position:fixed;inset:0;background:rgba(0,0,0,.62);backdrop-filter:blur(8px);z-index:200;align-items:center;justify-content:center;padding:24px}
.modal-card{background:#fff;border-radius:24px;padding:32px;max-width:640px;width:100%;max-height:90vh;overflow:auto}
.df-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.df-field{display:flex;flex-direction:column;gap:5px;min-width:0}
.df-field.df-wide{grid-column:1/-1}
.df-field label{font-size:11px;font-weight:600;color:var(--ink-2)}
.df-field input,.df-field select,.df-field textarea{padding:10px 12px;border:1px solid var(--line-2);border-radius:8px;font-family:inherit;font-size:13px;color:var(--ink);background:#fbfbfd;width:100%}
.df-field textarea{min-height:74px;resize:vertical}
@media (max-width:1300px){
  .base-strip{grid-template-columns:repeat(5,1fr)}
}
@media (max-width:1100px){
  .dt-hero-grid,.studio-grid{grid-template-columns:1fr;gap:20px}
  .brief-card{position:static}
  .dt-hero-photo{aspect-ratio:16/10;order:-1}
  .src-tabs{grid-template-columns:1fr}
  .src-tab b{display:inline}
  .src-tab small{display:inline;margin-left:8px}
}
@media (max-width:700px){
  .base-strip{grid-template-columns:repeat(3,1fr)}
  .devflow{grid-template-columns:1fr 1fr}
  .dt-hero{padding-top:calc(var(--nav-h) + 24px)}
  .dt-hero h1{font-size:32px;line-height:1.12}
  .part-tabs{grid-template-columns:repeat(5,1fr)}
  .part-tab{padding:9px 2px;font-size:10px}
}
@media (max-width:520px){
  .df-grid,.devflow{grid-template-columns:1fr}
  .base-strip{grid-template-columns:repeat(2,1fr)}
  .color-grid{grid-template-columns:repeat(6,1fr)}
  .render-bar{flex-direction:column}
}

/* --- studio head: five-step rail + info card (2026-09-23) --- */
.studio-head.sh-split{display:grid;grid-template-columns:minmax(0,1.18fr) minmax(0,.82fr);
  gap:48px;align-items:start;margin-bottom:30px}
.studio-head.sh-split .sh-main{min-width:0}
.studio-head.sh-split .sh-main .sec-lead{max-width:560px}

.sh-steps{display:flex;align-items:center;gap:8px;flex-wrap:wrap;list-style:none;
  margin:0 0 30px;padding:13px 18px;background:var(--surface);border:1px solid var(--line-2);
  border-radius:18px;box-shadow:var(--shadow-sm)}
.sh-step{display:inline-flex;align-items:center;gap:9px;font-size:12.5px;font-weight:600;
  color:var(--gray-2);white-space:nowrap}
.sh-step i{width:22px;height:22px;border-radius:50%;background:var(--bg-3);color:var(--gray);
  display:inline-flex;align-items:center;justify-content:center;font-style:normal;font-size:11.5px;font-weight:800}
.sh-step+.sh-step{margin-left:6px}
.sh-step+.sh-step::before{content:"";width:14px;height:1px;background:var(--line-2);margin-right:4px}
.sh-step.on{color:var(--ink)}
.sh-step.on i{background:var(--orange);color:#fff}

.sh-card{position:relative;background:var(--surface);border:1px solid var(--line-2);border-radius:24px;
  padding:28px 26px 22px 30px;box-shadow:var(--shadow-card);overflow:hidden}
.sh-card::before{content:"";position:absolute;left:0;top:0;bottom:0;width:3px;
  background:linear-gradient(180deg,var(--orange) 0%,var(--orange-l) 100%)}
.sh-k{display:inline-flex;align-items:center;gap:8px;font-size:10.5px;font-weight:800;
  letter-spacing:.16em;text-transform:uppercase;color:var(--orange)}
.sh-k::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--orange)}
.sh-list{list-style:none;margin:18px 0 0;padding:0;display:grid;gap:15px}
.sh-list li{position:relative;padding-left:28px;display:grid;gap:2px}
.sh-list li::before{content:"";position:absolute;left:0;top:3px;width:16px;height:16px;border-radius:50%;
  background:var(--accent-soft);border:1px solid rgba(255,87,34,.38)}
.sh-list li::after{content:"";position:absolute;left:5px;top:8px;width:6px;height:6px;border-radius:50%;
  background:var(--orange)}
.sh-list b{font-size:14.5px;font-weight:700;color:var(--ink);letter-spacing:-.01em}
.sh-list span{font-size:13px;color:var(--gray);line-height:1.45}
.sh-foot{margin-top:22px;padding-top:16px;border-top:1px solid var(--line);
  display:flex;align-items:center;justify-content:space-between;gap:12px}
.sh-foot span{font-size:10.5px;font-weight:800;letter-spacing:.16em;text-transform:uppercase;color:var(--gray-2)}
.sh-foot b{font-size:13.5px;font-weight:700;color:var(--ink-2);letter-spacing:-.01em}
.sh-foot b::before{content:"\2193  ";color:var(--orange)}

@media (max-width:1100px){
  .studio-head.sh-split{grid-template-columns:minmax(0,1.08fr) minmax(0,.92fr);gap:32px}
}
@media (max-width:900px){
  .studio-head.sh-split{grid-template-columns:1fr;gap:24px}
  .sh-steps{flex-wrap:nowrap;overflow-x:auto;padding:12px 14px;-webkit-overflow-scrolling:touch}
  .sh-step+.sh-step::before{width:10px}
}
@media (max-width:560px){
  .sh-card{padding:22px 20px 18px 24px;border-radius:20px}
  .sh-steps{margin:0 0 22px}
}