: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}
.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)}
.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}}
@media(prefers-reduced-motion:reduce){*,*:before,*:after{scroll-behavior:auto!important;transition:none!important}}