/* Trung tâm hỗ trợ chữ ký số hotro.chukyso.com — Inter, thẻ trắng; form gọn để ít phải cuộn */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{--bg:#f8fafc;--card:#fff;--line:rgba(2,6,23,.1);--text:#020617;--muted:#64748b;--primary:#2563eb;--primary2:#1d4ed8;--soft:rgba(37,99,235,.08);--red:#dc2626;--brand:#dc1f26;--green:#16a34a;--r:10px}
@media (prefers-color-scheme:dark){:root{--bg:#020617;--card:#0f172a;--line:rgba(255,255,255,.12);--text:#f8fafc;--muted:#94a3b8;--primary:#3b82f6;--primary2:#2563eb;--soft:rgba(59,130,246,.15);--brand:#f87171}}
body{font-family:Inter,system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif;background:var(--bg);color:var(--text);font-size:14.5px;line-height:1.5;-webkit-font-smoothing:antialiased}
.wrap{max-width:1180px;margin:0 auto;padding:0 16px}
a{color:var(--primary)}

/* Header */
.top{background:var(--card);border-bottom:1px solid var(--line)}
.top .wrap{display:flex;align-items:center;justify-content:space-between;min-height:60px;gap:12px}
.brand{display:flex;align-items:center;gap:14px;text-decoration:none;color:var(--text);min-width:0}
.brand img{display:block;height:36px;width:auto}
.brand-title{font-weight:700;font-size:17px;padding-left:14px;border-left:1px solid var(--line);white-space:nowrap}
.hotline{font-weight:700;text-decoration:none;white-space:nowrap;background:var(--brand);color:#fff;padding:7px 14px;border-radius:999px}
.hotline-label{font-weight:500;opacity:.85}

/* Bố cục 2 cột */
.layout{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:20px;align-items:start;padding-top:16px;padding-bottom:12px}
.side{display:flex;flex-direction:column;gap:12px;position:sticky;top:16px}
.card{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:18px 20px;box-shadow:0 1px 2px rgba(2,6,23,.05)}
h1{font-size:19px;font-weight:700;margin-bottom:2px}
h2{font-size:12px;font-weight:600;text-transform:uppercase;letter-spacing:.04em;color:var(--muted);margin:12px 0 6px}
.side h2{margin-top:0}
.muted{color:var(--muted);font-weight:400;font-size:13px}

/* Form */
.grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px 12px}
.field{display:flex;flex-direction:column;gap:4px;min-width:0}
.field.span2{grid-column:span 2}
.field.full{grid-column:1/-1}
label{font-size:13.5px;font-weight:500}
label b{color:var(--red)}
input,select,textarea{font:inherit;color:var(--text);background:var(--card);border:1px solid var(--line);border-radius:8px;padding:8px 11px;width:100%;outline:none;font-size:15px}
textarea{resize:vertical;min-height:70px}
input:focus,select:focus,textarea:focus{border-color:var(--primary);box-shadow:0 0 0 1px var(--primary)}
.invalid{border-color:var(--red)!important}
.err{color:var(--red);font-size:12.5px}
.hint{color:var(--muted);font-size:12.5px}
.hint:empty{display:none}
.label-row{display:flex;align-items:center;justify-content:space-between;gap:10px}
.label-row .upload-btn{padding:3px 10px;font-size:13px}
.input-btn{display:flex;gap:6px}
.input-btn input{flex:1;min-width:0}
.btn-primary,.btn-light{font:inherit;font-weight:600;border-radius:8px;padding:8px 14px;cursor:pointer;border:1px solid transparent;text-align:center}
.btn-primary{background:var(--primary);color:#fff;padding:11px 22px;white-space:nowrap}
.btn-primary:hover{background:var(--primary2)}
.btn-primary:disabled{opacity:.6;cursor:wait}
.btn-light{background:var(--card);border-color:var(--line);color:var(--text);white-space:nowrap}
.btn-light:hover{background:var(--soft)}
.visually-hidden{position:absolute!important;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.upload{display:flex;align-items:center;gap:10px;flex-wrap:wrap}
.upload-btn{display:inline-block}
.previews{display:flex;flex-wrap:wrap;gap:8px}
.previews:not(:empty){margin-top:8px}
.previews figure{position:relative;width:72px;height:72px;border-radius:8px;overflow:hidden;border:1px solid var(--line)}
.previews img{width:100%;height:100%;object-fit:cover}
.previews button{position:absolute;top:2px;right:2px;border:0;border-radius:999px;width:22px;height:22px;background:rgba(2,6,23,.65);color:#fff;cursor:pointer}

/* Hỗ trợ từ xa */
.remote{display:grid;grid-template-columns:minmax(0,1fr) 150px 150px;gap:10px 12px;align-items:center;margin-top:14px;padding:12px 14px;border:1px dashed var(--line);border-radius:12px;background:var(--soft)}
.remote-head{display:flex;gap:12px;align-items:center}
.remote-head img{flex-shrink:0}
.remote-head .hint{display:block;margin-top:2px}
.remote .field label{font-size:12.5px}

.submit-row{display:flex;align-items:center;gap:16px;margin-top:14px}
.consent{display:flex;gap:9px;align-items:flex-start;font-weight:400;font-size:13px;color:var(--muted);flex:1}
.consent input{width:17px;height:17px;margin-top:2px;flex-shrink:0}
.cf-turnstile{flex-shrink:0;min-height:65px}
.hp{position:absolute;left:-10000px;width:1px;height:1px;overflow:hidden}
.alert{margin-top:12px;padding:9px 12px;border-radius:8px;font-size:13.5px;background:var(--soft)}
.alert.error{background:rgba(220,38,38,.08);color:var(--red)}
.done{text-align:center;padding:24px 0}
.done-icon{width:56px;height:56px;border-radius:999px;background:rgba(22,163,74,.12);color:var(--green);font-size:30px;line-height:56px;margin:0 auto 10px}
.done h2{font-size:17px;text-transform:none;letter-spacing:0;color:var(--text)}
.done p{margin:8px 0}
.done .code{font-size:22px;font-weight:700;letter-spacing:.5px}

/* Cột phải */
.side-call{display:flex;flex-direction:column;text-decoration:none;color:var(--text);padding:14px 18px}
.side-call strong{font-size:22px;color:var(--brand);letter-spacing:.3px}
.side-uv{display:flex;align-items:center;gap:12px;text-decoration:none;color:var(--text);padding:12px 18px}
.side-uv span{display:flex;flex-direction:column}
.side-uv:hover,.side-call:hover{border-color:var(--primary)}
.guides{list-style:none;display:flex;flex-direction:column}
.guides li+li{border-top:1px solid var(--line)}
.guides a{display:block;padding:6px 0;text-decoration:none;color:var(--text);font-size:13.5px}
.guides a:hover{color:var(--primary)}
.more{display:inline-block;margin-top:8px;font-size:13px;font-weight:600;text-decoration:none}
.stack{display:flex;flex-direction:column;gap:8px}
.foot{color:var(--muted);font-size:12.5px;text-align:center;padding-bottom:24px}

@media (max-width:980px){
  .layout{grid-template-columns:1fr}
  .side{position:static}
}
@media (max-width:700px){
  .grid{grid-template-columns:1fr 1fr}
  .field.span2,.field.m-full{grid-column:1/-1}
  .remote{grid-template-columns:1fr 1fr}
  .remote-head{grid-column:1/-1}
  .submit-row{flex-direction:column;align-items:stretch}
  .btn-primary{width:100%}
}
@media (max-width:560px){
  .card{padding:16px}
  .brand img{height:26px}
  .brand{gap:10px}
  .brand-title{font-size:13px;padding-left:10px;white-space:normal;line-height:1.25;max-width:120px}
  .hotline-label{display:none}
  .hotline{padding:6px 11px;font-size:13.5px}
}