:root{--bg:#dbe8e7;--line:rgba(255,255,255,.72);--ink:#183638;--sub:#557174;--red:#dc423d;--red-dark:#b9312e;--teal:#167d78;--green:#12814f}
*{box-sizing:border-box}
[hidden]{display:none!important}
body{margin:0;min-height:100vh;background:radial-gradient(circle at 8% 12%,rgba(255,255,255,.9),transparent 28%),radial-gradient(circle at 92% 8%,rgba(170,226,220,.78),transparent 30%),linear-gradient(135deg,#dceceb,#e9e6f2 52%,#d8e9e4);color:var(--ink);font:16px/1.6 "Noto Sans Thai",system-ui,sans-serif}
button,input,select{font:inherit}
button:focus-visible,input:focus-visible,select:focus-visible,a:focus-visible{outline:3px solid rgba(22,125,120,.35);outline-offset:2px}
.top{height:72px;display:flex;align-items:center;justify-content:space-between;gap:16px;padding:0 max(20px,calc((100vw - 1180px)/2));border-bottom:1px solid var(--line);background:rgba(255,255,255,.5);backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px)}
.brand{color:var(--ink);font-size:22px;font-weight:800;text-decoration:none;white-space:nowrap}
.brand i{color:var(--red);font-style:normal}
.nav{display:flex;align-items:center;gap:20px}
.nav a{color:var(--ink);font-size:14px;font-weight:600;text-decoration:none}
.nav a:hover{color:var(--red)}
.menubtn{width:42px;height:42px;border:1px solid var(--line);border-radius:12px;background:rgba(255,255,255,.7);cursor:pointer;font-size:20px}
.workspace{width:min(100% - 32px,980px);margin:38px auto 70px}
.intro{margin-bottom:22px}
.intro .eyebrow{color:var(--teal);font-size:13px;font-weight:700;letter-spacing:.04em}
.intro h1{margin:3px 0 7px;font-size:clamp(26px,4vw,36px);line-height:1.3}
.intro p{margin:0;color:var(--sub)}
.panel{padding:26px;border:1px solid rgba(255,255,255,.8);border-radius:22px;background:rgba(255,255,255,.61);box-shadow:0 14px 38px rgba(43,87,89,.1);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px)}
.dropzone{display:grid;place-items:center;min-height:210px;padding:25px;border:2px dashed rgba(22,125,120,.36);border-radius:17px;background:rgba(255,255,255,.52);text-align:center;transition:.18s}
.dropzone.over{border-color:var(--teal);background:rgba(219,255,247,.74)}
.dropicon{font-size:44px;line-height:1}
.dropzone h2{margin:12px 0 3px;font-size:19px}
.dropzone p{margin:0 0 15px;color:var(--sub);font-size:14px}
.btn{display:inline-flex;align-items:center;justify-content:center;min-height:44px;padding:9px 18px;border:0;border-radius:12px;background:linear-gradient(135deg,var(--red),#ed6b5a);color:white;font-weight:700;cursor:pointer}
.btn:hover:not(:disabled){background:var(--red-dark)}
.btn:disabled{background:#b8c2c2;cursor:not-allowed}
.fileinfo{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-top:14px;padding:12px 14px;border-radius:12px;background:rgba(255,255,255,.7);color:var(--sub);font-size:14px}
.fileinfo strong{display:block;max-width:70ch;overflow:hidden;color:var(--ink);text-overflow:ellipsis;white-space:nowrap}
.text-btn{border:0;background:none;color:var(--red-dark);font-weight:700;cursor:pointer}
.page-selection{margin-top:20px}
.page-selection-head{display:flex;align-items:center;justify-content:space-between;gap:14px;margin-bottom:14px}
.page-selection-head h2{margin:0;font-size:18px}
.page-selection-head p{margin:3px 0 0;color:var(--sub);font-size:13px}
.selection-actions{display:flex;gap:12px;flex-wrap:wrap}
.page-thumbnails{display:grid;grid-template-columns:repeat(auto-fill,minmax(132px,1fr));gap:12px}
.page-thumb{position:relative;display:flex;flex-direction:column;align-items:center;gap:8px;min-width:0;padding:10px;border:2px solid transparent;border-radius:14px;background:rgba(255,255,255,.72);color:var(--ink);cursor:pointer;box-shadow:0 4px 14px rgba(43,87,89,.08);transition:border-color .16s,background .16s,transform .16s}
.page-thumb:hover{transform:translateY(-2px);border-color:rgba(22,125,120,.45)}
.page-thumb[aria-pressed="true"]{border-color:var(--red);background:#fff1f0}
.page-thumb canvas{display:block;width:100%;height:170px;object-fit:contain;border-radius:5px;background:#fff;box-shadow:0 1px 5px rgba(0,0,0,.16)}
.page-thumb-label{font-size:13px;font-weight:700}
.page-thumb-check{position:absolute;top:7px;right:7px;display:grid;place-items:center;width:24px;height:24px;border-radius:50%;background:var(--red);color:#fff;font-size:14px;opacity:0;transform:scale(.8);transition:opacity .16s,transform .16s}
.page-thumb[aria-pressed="true"] .page-thumb-check{opacity:1;transform:scale(1)}

/* ---------- Rotate live preview ---------- */
.page-thumb canvas{transition:transform .28s cubic-bezier(.2,.8,.2,1),max-width .2s,max-height .2s;transform-origin:50% 50%}
.page-thumb.is-rotated{background:#f2f7f6;border-color:rgba(22,125,120,.45);overflow:hidden}
.page-thumb.is-rotated canvas{height:auto}
.page-thumbnails.is-landscape .page-thumb:not(.is-rotated) canvas{opacity:.92}
.rotate-badge{display:inline-flex;align-items:center;gap:4px;margin-top:6px;padding:3px 10px;border-radius:999px;
  background:rgba(255,255,255,.8);border:1px solid rgba(22,125,120,.24);color:var(--sub);
  font-size:12px;font-weight:700;white-space:nowrap}
.rotate-badge.ok{background:rgba(22,125,120,.12);border-color:rgba(22,125,120,.42);color:var(--teal)}

.rotate-detail{margin:20px 0 6px}
.rotate-detail-head{display:flex;align-items:center;justify-content:space-between;gap:14px;margin-bottom:12px}
.rotate-detail-head h2{margin:0;font-size:18px}
.rotate-detail-head p{margin:3px 0 0;color:var(--sub);font-size:13px}
.rotate-stage{display:flex;justify-content:center;align-items:center;min-height:220px;padding:22px;border-radius:16px;
  background:repeating-conic-gradient(#eef4f3 0 25%,#e4ecec 0 50%) 0 0/22px 22px;
  border:1px solid rgba(22,125,120,.14)}
.rotate-frame{position:relative;display:grid;place-items:center;transition:width .3s ease,height .3s ease}
.rotate-frame canvas{display:block;box-shadow:0 12px 28px rgba(24,54,56,.22);border-radius:2px;
  transform-origin:50% 50%;transition:transform .3s cubic-bezier(.2,.8,.2,1)}
.rotate-empty{color:var(--sub);font-size:13.5px;padding:52px 24px;background:rgba(255,255,255,.6);border-radius:10px;width:220px;text-align:center}

@media(max-width:600px){.rotate-detail-head{flex-direction:column;align-items:flex-start}.rotate-stage{padding:14px}}
.options{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px;margin:20px 0}
.field{display:flex;flex-direction:column;gap:5px;min-width:0}
.field.full{grid-column:1/-1}
.field label{font-size:14px;font-weight:700}
.field input,.field select{width:100%;min-height:44px;padding:9px 11px;border:1px solid rgba(22,125,120,.24);border-radius:10px;background:rgba(255,255,255,.86);color:var(--ink)}
.field input[type=range]{padding:0;accent-color:var(--teal)}
.hint{color:var(--sub);font-size:12px;line-height:1.5}
.checkrow{display:flex;align-items:center;gap:9px;min-height:42px}
.checkrow input{width:18px;height:18px;accent-color:var(--teal)}

/* ---------- Interactive crop preview ---------- */
.crop-tool{margin-top:20px}
.crop-head{display:flex;align-items:center;justify-content:space-between;gap:14px;margin-bottom:12px}
.crop-head h2{margin:0;font-size:18px}
.crop-head p{margin:3px 0 0;color:var(--sub);font-size:13px}
.crop-nav{display:flex;align-items:center;gap:6px;flex:none}
.crop-nav #cropPageLabel{min-width:88px;text-align:center;font-size:13.5px;font-weight:700;color:var(--ink)}
.crop-nav-btn{width:34px;height:34px;display:grid;place-items:center;padding:0;border:1px solid rgba(22,125,120,.24);border-radius:10px;background:rgba(255,255,255,.8);color:var(--ink);font-size:19px;line-height:1;cursor:pointer;transition:background .15s,border-color .15s}
.crop-nav-btn:hover:not(:disabled){background:#e3f7f2;border-color:var(--teal)}
.crop-nav-btn:disabled{opacity:.4;cursor:not-allowed}
.crop-stage{display:flex;justify-content:center;padding:18px;border-radius:16px;background:repeating-conic-gradient(#eef4f3 0 25%,#e4ecec 0 50%) 0 0/22px 22px;border:1px solid rgba(22,125,120,.14);max-height:70vh;overflow:auto}
.crop-page{position:relative;flex:none;line-height:0;box-shadow:0 10px 26px rgba(24,54,56,.18);border-radius:4px;background:#fff}
.crop-page canvas{display:block;border-radius:4px;background:#fff}
.crop-overlay{position:absolute;inset:0;overflow:hidden;cursor:crosshair;border-radius:4px;touch-action:none}
.crop-box{position:absolute;box-sizing:border-box;border:2px solid var(--red);box-shadow:0 0 0 9999px rgba(24,54,56,.42);cursor:move;outline:none;touch-action:none}
.crop-box:focus-visible{box-shadow:0 0 0 9999px rgba(24,54,56,.42),0 0 0 3px rgba(22,125,120,.55)}
.crop-box.dragging{cursor:grabbing}
.crop-handle{position:absolute;width:12px;height:12px;border-radius:3px;background:#fff;border:2px solid var(--red);box-shadow:0 1px 3px rgba(0,0,0,.22)}
.crop-handle::after{content:"";position:absolute;inset:-9px}
.crop-handle[data-handle="nw"]{left:-7px;top:-7px;cursor:nwse-resize}
.crop-handle[data-handle="ne"]{right:-7px;top:-7px;cursor:nesw-resize}
.crop-handle[data-handle="sw"]{left:-7px;bottom:-7px;cursor:nesw-resize}
.crop-handle[data-handle="se"]{right:-7px;bottom:-7px;cursor:nwse-resize}
.crop-handle[data-handle="n"]{left:50%;top:-7px;transform:translateX(-50%);cursor:ns-resize}
.crop-handle[data-handle="s"]{left:50%;bottom:-7px;transform:translateX(-50%);cursor:ns-resize}
.crop-handle[data-handle="w"]{top:50%;left:-7px;transform:translateY(-50%);cursor:ew-resize}
.crop-handle[data-handle="e"]{top:50%;right:-7px;transform:translateY(-50%);cursor:ew-resize}
.crop-size{position:absolute;left:50%;top:-12px;transform:translate(-50%,-100%);padding:3px 9px;border-radius:7px;background:rgba(24,54,56,.9);color:#fff;font-size:11.5px;font-weight:700;line-height:1.5;white-space:nowrap;pointer-events:none}
.crop-footer{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap;margin-top:12px}
.crop-summary{margin:0;color:var(--sub);font-size:13px}
.crop-summary.ok{color:var(--green);font-weight:600}
.crop-footer-actions{display:flex;align-items:center;gap:16px;flex-wrap:wrap}
.crop-flag{display:inline-flex;align-items:center;gap:7px;font-size:13.5px;font-weight:600;cursor:pointer}
.crop-flag input{width:17px;height:17px;accent-color:var(--teal)}

@media(max-width:600px){.crop-head{flex-direction:column;align-items:flex-start}.crop-stage{padding:10px;max-height:58vh}.crop-summary{width:100%}}

/* ---------- Watermark live preview ---------- */
.wm-preview{margin:20px 0}
.wm-preview-head{display:flex;align-items:center;justify-content:space-between;gap:14px;margin-bottom:12px}
.wm-preview-head h2{margin:0;font-size:18px}
.wm-preview-head p{margin:3px 0 0;color:var(--sub);font-size:13px}
.wm-preview-nav{display:flex;align-items:center;gap:6px;flex:none}
.wm-preview-nav #wmPageLabel{min-width:88px;text-align:center;font-size:13.5px;font-weight:700}
.wm-stage{display:flex;justify-content:center;padding:18px;border-radius:16px;background:repeating-conic-gradient(#eef4f3 0 25%,#e4ecec 0 50%) 0 0/22px 22px;border:1px solid rgba(22,125,120,.14);max-height:70vh;overflow:auto}
.wm-sheet{flex:none;line-height:0;border-radius:4px;background:#fff;box-shadow:0 10px 26px rgba(24,54,56,.18)}
.wm-sheet canvas{display:block;border-radius:4px;background:#fff}
.wm-preview[aria-busy="true"] .wm-stage::after{content:"กำลังสร้างพรีวิว…";align-self:center;color:var(--sub);font-size:13px;background:rgba(255,255,255,.9);padding:8px 14px;border-radius:9px}

@media(max-width:600px){.wm-preview-head{flex-direction:column;align-items:flex-start}.wm-stage{padding:10px;max-height:58vh}}
.actions{display:flex;align-items:center;gap:12px;flex-wrap:wrap;margin-top:18px}
.run{min-width:210px;min-height:50px;font-size:16px}
.status{min-height:25px;margin:12px 0 0;color:var(--sub);font-size:14px}
.status.error{color:#b42318}
.status.success{color:#087443}
.download{display:inline-flex;align-items:center;justify-content:center;min-height:46px;padding:8px 17px;border:1px solid rgba(18,129,79,.24);border-radius:12px;background:#e7f7ee;color:#087443;font-weight:700;text-decoration:none}
.privacy{margin-top:18px;padding:12px 14px;border-radius:12px;background:rgba(219,255,247,.5);color:#426461;font-size:13px}
.privacy strong{color:#17685f}
.backlink{display:inline-block;margin-top:16px;color:var(--teal);font-size:14px;font-weight:700;text-decoration:none}
.backlink:hover{text-decoration:underline}
@media(max-width:600px){.top{height:62px;padding:0 16px}.brand{font-size:19px}.nav{gap:12px}.nav a{font-size:13px}.workspace{margin-top:25px}.panel{padding:18px}.dropzone{min-height:180px}.options{grid-template-columns:1fr}.field.full{grid-column:auto}.run{width:100%}.fileinfo{align-items:flex-start}.page-selection-head{align-items:flex-start;flex-direction:column}.page-thumbnails{grid-template-columns:repeat(auto-fill,minmax(105px,1fr));gap:9px}.page-thumb{padding:7px}.page-thumb canvas{height:145px}.selection-actions{gap:16px}}
@media(prefers-reduced-motion:reduce){*,*:before,*:after{scroll-behavior:auto!important;transition:none!important}}