.fdt-portal,.fdt-portal-login{--fdt-primary:#155eef;--fdt-ink:#101828;--fdt-muted:#667085;--fdt-line:#e4e7ec;--fdt-bg:#f8fafc;color:var(--fdt-ink);font:15px/1.5 -apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;box-sizing:border-box}
.fdt-portal *,.fdt-portal-login *{box-sizing:border-box}.fdt-portal{max-width:1180px;margin:32px auto;padding:0 16px}.fdt-portal-head{display:flex;align-items:center;justify-content:space-between;gap:20px;margin-bottom:22px}.fdt-portal h1{font-size:clamp(28px,4vw,42px);line-height:1.1;margin:4px 0}.fdt-eyebrow{color:var(--fdt-primary);font-size:12px;font-weight:800;letter-spacing:.14em}.fdt-user{display:flex;align-items:center;gap:10px;font-weight:700}.fdt-user img{border-radius:50%}.fdt-tabs{display:flex;gap:6px;overflow:auto;padding:6px;background:#eef2f6;border-radius:14px;margin-bottom:22px}.fdt-tabs a{flex:0 0 auto;padding:10px 15px;color:#344054;text-decoration:none;border-radius:10px;font-weight:700}.fdt-tabs a.is-active{background:#fff;color:var(--fdt-primary);box-shadow:0 1px 3px #1018281a}.fdt-layout{display:grid;grid-template-columns:minmax(300px,420px) minmax(0,1fr);gap:22px;align-items:start}.fdt-panel{background:#fff;border:1px solid var(--fdt-line);border-radius:18px;padding:22px;box-shadow:0 8px 30px #1018280a}.fdt-panel h2{font-size:21px;margin:0 0 18px}.fdt-form label{display:block;font-weight:700;margin:0 0 13px}.fdt-form input:not([type=checkbox]),.fdt-form textarea,.fdt-form select{display:block;width:100%;min-height:44px;margin-top:5px;padding:9px 11px;border:1px solid #d0d5dd;border-radius:9px;background:#fff;color:var(--fdt-ink);font:inherit}.fdt-form textarea{min-height:88px;resize:vertical}.fdt-row{display:flex;gap:12px;align-items:end;flex-wrap:wrap}.fdt-row>label{flex:1 1 130px}.fdt-check{align-self:center}.fdt-check input{margin-right:6px}.fdt-button{display:inline-flex;align-items:center;justify-content:center;border:0;border-radius:10px;background:var(--fdt-primary);color:#fff!important;padding:11px 18px;font-weight:800;text-decoration:none;cursor:pointer}.fdt-link{border:0;background:none;color:var(--fdt-primary);font:inherit;font-weight:700;padding:0;cursor:pointer}.fdt-list article{display:flex;justify-content:space-between;gap:16px;padding:15px 0;border-bottom:1px solid var(--fdt-line)}.fdt-list article:last-child{border-bottom:0}.fdt-list article>div:first-child{min-width:0}.fdt-list strong,.fdt-list small{display:block}.fdt-list small{color:var(--fdt-muted);overflow-wrap:anywhere}.fdt-actions{display:flex;align-items:center;justify-content:flex-end;gap:10px;flex-wrap:wrap}.fdt-actions a{color:var(--fdt-primary);text-decoration:none;font-weight:700}.fdt-actions .is-danger{color:#b42318}.fdt-badge{display:inline-block;margin-top:6px;padding:2px 8px;border-radius:999px;background:#ecfdf3;color:#067647;font-size:12px}.fdt-alert{padding:12px 15px;border-radius:10px;margin-bottom:18px}.fdt-alert.is-error{background:#fef3f2;color:#b42318}.fdt-alert.is-success{background:#ecfdf3;color:#067647}.fdt-metrics{display:grid;grid-template-columns:repeat(4,1fr);gap:15px;margin-bottom:20px}.fdt-metrics article{background:linear-gradient(145deg,#fff,#f7f9ff);border:1px solid var(--fdt-line);border-radius:16px;padding:22px}.fdt-metrics strong{display:block;color:var(--fdt-primary);font-size:32px}.fdt-metrics span{color:var(--fdt-muted)}.fdt-quick{display:grid;grid-template-columns:repeat(2,1fr);gap:10px}.fdt-quick a{padding:13px;border-radius:10px;background:var(--fdt-bg);color:var(--fdt-primary);font-weight:700;text-decoration:none}.fdt-portal-login{max-width:640px;margin:50px auto;padding:36px;border:1px solid var(--fdt-line);border-radius:20px;background:#fff;text-align:center}.fdt-qr-preview svg{display:block;max-width:260px!important;margin:16px auto}.fdt-signature-preview{padding:16px;border:1px dashed #d0d5dd;border-radius:10px;overflow:auto;margin-bottom:16px}
@media(max-width:860px){.fdt-layout{grid-template-columns:1fr}.fdt-metrics{grid-template-columns:repeat(2,1fr)}}@media(max-width:540px){.fdt-portal{padding:0 10px}.fdt-portal-head{align-items:flex-start}.fdt-user span{display:none}.fdt-row{display:block}.fdt-list article{display:block}.fdt-actions{justify-content:flex-start;margin-top:10px}.fdt-quick{grid-template-columns:1fr}}
.fdt-head-copy{margin:8px 0;color:var(--fdt-muted);font-size:17px}.fdt-free-points{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px}.fdt-free-points span{padding:6px 10px;border-radius:999px;background:#ecfdf3;color:#067647;font-weight:700;font-size:13px}.fdt-browser-note{margin:-8px 0 18px;color:var(--fdt-muted);font-size:13px}.fdt-browser-note summary{cursor:pointer;color:#475467;font-weight:700}.fdt-browser-note p{margin:8px 0;padding:10px 12px;background:#fffaeb;border-radius:8px}.fdt-tool-intro{display:flex;gap:14px;align-items:flex-start;margin:0 0 18px}.fdt-tool-intro>span{display:grid;place-items:center;flex:0 0 34px;height:34px;border-radius:50%;background:var(--fdt-primary);color:#fff;font-weight:800}.fdt-tool-intro h2{margin:0 0 3px;font-size:24px}.fdt-tool-intro p{margin:0;color:var(--fdt-muted)}.fdt-help{display:block;margin-top:5px;color:var(--fdt-muted);font-size:12px;line-height:1.45;font-weight:400}.fdt-advanced{margin:8px 0 18px;border:1px solid var(--fdt-line);border-radius:12px;background:#fafbfc}.fdt-advanced summary{padding:13px 14px;cursor:pointer;color:#344054;font-weight:800}.fdt-advanced-body{padding:2px 14px 14px}.fdt-button-main{width:100%;min-height:50px;font-size:16px}.fdt-prefix-input{display:flex;align-items:stretch;margin-top:5px}.fdt-prefix-input span{display:flex;align-items:center;max-width:58%;padding:9px 10px;border:1px solid #d0d5dd;border-right:0;border-radius:9px 0 0 9px;background:#f2f4f7;color:#667085;font-size:12px;overflow:hidden;white-space:nowrap;text-overflow:ellipsis}.fdt-prefix-input input{margin-top:0!important;border-radius:0 9px 9px 0!important}.fdt-welcome{margin-bottom:24px}.fdt-welcome>h2{font-size:27px;margin:0 0 5px}.fdt-welcome>p{margin:0 0 18px;color:var(--fdt-muted)}.fdt-tool-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:15px}.fdt-tool-grid a{display:grid;grid-template-columns:auto 1fr;column-gap:12px;padding:20px;border:1px solid var(--fdt-line);border-radius:18px;background:#fff;color:var(--fdt-ink);text-decoration:none;transition:.18s ease}.fdt-tool-grid a:hover{transform:translateY(-2px);border-color:#b2ccff;box-shadow:0 10px 24px #1018280d}.fdt-tool-grid b{grid-row:1/4;font-size:28px}.fdt-tool-grid strong{font-size:18px}.fdt-tool-grid span{color:var(--fdt-muted);margin:5px 0}.fdt-tool-grid em{color:var(--fdt-primary);font-style:normal;font-weight:800}.fdt-form input:focus,.fdt-form textarea:focus,.fdt-form select:focus{outline:3px solid #dbe7ff;border-color:var(--fdt-primary)}
@media(max-width:640px){.fdt-tool-grid{grid-template-columns:1fr}.fdt-tool-intro h2{font-size:21px}.fdt-prefix-input{display:block}.fdt-prefix-input span{max-width:none;border-right:1px solid #d0d5dd;border-radius:9px 9px 0 0}.fdt-prefix-input input{border-radius:0 0 9px 9px!important}.fdt-free-points{gap:5px}}
/* Refined frontend layout. Kept at the end so common themes cannot disturb controls. */
.fdt-portal{--fdt-primary:#2563eb;--fdt-primary-dark:#1d4ed8;--fdt-soft:#eff6ff;max-width:1200px;margin:36px auto;padding:32px;background:linear-gradient(180deg,#fff 0,#fbfdff 100%);border:1px solid #e5eaf2;border-radius:28px;box-shadow:0 18px 55px rgba(15,23,42,.08)}
.fdt-portal-head{padding:4px 4px 22px;margin-bottom:0}.fdt-portal h1{max-width:850px;font-weight:800;letter-spacing:-.035em}.fdt-eyebrow{display:inline-block;margin-bottom:5px}.fdt-head-copy{max-width:720px}.fdt-browser-note{margin:0 4px 22px}.fdt-tabs{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:8px;padding:8px;margin:0 0 30px;background:#f1f5f9;border:1px solid #e5eaf2}.fdt-tabs a{display:flex;min-height:46px;align-items:center;justify-content:center;text-align:center;padding:10px 12px}.fdt-tabs a:hover{background:#fff;color:var(--fdt-primary)}
.fdt-tool-intro{margin:0 0 20px;padding:0 4px}.fdt-layout{grid-template-columns:minmax(380px,500px) minmax(0,1fr);gap:24px}.fdt-panel{padding:26px;border-color:#e2e8f0;border-radius:20px;box-shadow:0 8px 25px rgba(15,23,42,.045)}.fdt-form{display:flex;flex-direction:column;gap:2px}.fdt-form label{margin-bottom:15px;color:#1e293b}.fdt-form input:not([type=checkbox]),.fdt-form textarea,.fdt-form select{min-height:48px;padding:11px 13px;border-color:#cbd5e1;border-radius:11px;box-shadow:0 1px 2px rgba(15,23,42,.03)}.fdt-form textarea{min-height:104px}.fdt-help{min-height:18px}.fdt-advanced{margin:2px 0 18px;background:#f8fafc}.fdt-advanced summary{min-height:48px;display:flex;align-items:center}.fdt-button,.fdt-actions a,.fdt-actions button{display:inline-flex!important;min-height:40px;align-items:center;justify-content:center;border-radius:10px!important;padding:8px 13px!important;line-height:1.2!important;text-align:center;text-decoration:none!important}.fdt-button{background:linear-gradient(135deg,var(--fdt-primary),var(--fdt-primary-dark));box-shadow:0 7px 16px rgba(37,99,235,.2)}.fdt-button:hover{filter:brightness(.97);transform:translateY(-1px)}.fdt-button-main{min-height:52px;font-size:16px}.fdt-actions{gap:8px}.fdt-actions a,.fdt-actions button{border:1px solid #dbe4f0!important;background:#f8fafc!important;color:#1d4ed8!important;font-weight:700!important}.fdt-actions a:hover,.fdt-actions button:hover{background:#eff6ff!important;border-color:#bfdbfe!important}.fdt-actions .is-danger{background:#fff5f5!important;border-color:#fecaca!important;color:#b42318!important}.fdt-list article{align-items:center;min-height:82px;padding:16px 0}.fdt-list article>div:first-child{flex:1}.fdt-list .fdt-actions{flex:0 1 auto}.fdt-prefix-input span{min-height:48px}.fdt-tool-grid{gap:18px}.fdt-tool-grid a{min-height:142px;padding:23px;border-radius:20px}.fdt-tool-grid b{display:grid;place-items:center;width:48px;height:48px;border-radius:14px;background:var(--fdt-soft);font-size:24px}.fdt-tool-grid strong{font-size:19px}.fdt-tool-grid em{align-self:end}.fdt-metrics article{min-height:116px;display:flex;flex-direction:column;justify-content:center}.fdt-signature-preview{min-height:130px;background:#fff}.fdt-qr-preview{min-height:20px}
@media(max-width:900px){.fdt-portal{margin:24px 12px;padding:24px}.fdt-layout{grid-template-columns:1fr}.fdt-tabs{grid-template-columns:repeat(5,max-content);overflow-x:auto}.fdt-tabs a{min-width:120px}.fdt-list article{align-items:flex-start}}
@media(max-width:540px){.fdt-portal{margin:14px 8px;padding:18px 14px;border-radius:20px}.fdt-portal h1{font-size:30px}.fdt-tabs{margin-bottom:24px}.fdt-panel{padding:19px 16px}.fdt-tool-grid a{min-height:132px;padding:18px}.fdt-actions a,.fdt-actions button{flex:1 1 calc(50% - 8px)}.fdt-button-main{width:100%}.fdt-free-points span{font-size:12px}.fdt-help{min-height:0}}
/* Stable field and result alignment. */
.fdt-prefix-input{display:grid!important;grid-template-columns:minmax(125px,max-content) minmax(0,1fr);width:100%}.fdt-prefix-input span{width:auto!important;max-width:280px;min-width:0;overflow:hidden}.fdt-prefix-input input{width:100%!important;min-width:0!important}.fdt-list article{display:grid!important;grid-template-columns:minmax(0,1fr)!important;gap:0!important}.fdt-list .fdt-actions{display:grid!important;grid-template-columns:repeat(auto-fit,minmax(118px,1fr));align-items:stretch;width:100%;margin-top:16px}.fdt-list .fdt-actions>*{width:100%!important;min-width:0!important;min-height:42px!important;margin:0!important;white-space:normal!important;text-transform:none!important}.fdt-list .fdt-actions>b{display:flex;align-items:center;grid-column:1/-1;width:auto!important;min-height:24px!important;color:#475569}.fdt-signature-result{padding:18px!important;border:1px solid #e2e8f0!important;border-radius:16px;background:#fff}.fdt-signature-result+.fdt-signature-result{margin-top:14px}.fdt-signature-item-preview{margin-top:14px;padding:18px;border:1px dashed #cbd5e1;border-radius:12px;background:#fff;overflow:auto}.fdt-signature-item-preview:before{content:'Bản xem trước';display:block;margin-bottom:12px;color:#64748b;font-size:12px;font-weight:800;text-transform:uppercase;letter-spacing:.08em}
@media(max-width:540px){.fdt-prefix-input{grid-template-columns:1fr!important}.fdt-prefix-input span{max-width:none!important;border-radius:9px 9px 0 0!important;border-right:1px solid #d0d5dd!important}.fdt-list .fdt-actions{grid-template-columns:repeat(2,minmax(0,1fr))}.fdt-signature-item-preview{padding:12px}}
.fdt-email-guide{margin-top:24px;padding:30px!important;background:linear-gradient(145deg,#fff 0%,#f8fbff 100%)}.fdt-guide-head{display:flex;align-items:center;gap:14px;margin-bottom:22px}.fdt-guide-head h2{margin:0 0 4px!important;font-size:24px!important}.fdt-guide-head p{margin:0;color:#64748b}.fdt-guide-icon{display:grid;place-items:center;flex:0 0 48px;height:48px;border-radius:14px;background:#eaf1ff;color:#155eef;font-size:23px}.fdt-guide-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}.fdt-guide-card{padding:22px!important;border:1px solid #e2e8f0!important;border-radius:16px;background:#fff;box-shadow:0 5px 16px rgba(15,23,42,.04)}.fdt-guide-card header{display:flex;align-items:center;gap:12px;padding-bottom:16px;border-bottom:1px solid #eef2f6}.fdt-guide-card h3{margin:0 0 3px;font-size:19px}.fdt-guide-card header p{margin:0;color:#64748b;font-size:13px}.fdt-mail-mark{display:grid;place-items:center;flex:0 0 40px;height:40px;border-radius:11px;font-weight:900}.fdt-mail-mark.is-gmail{background:#fff1f0;color:#d93025}.fdt-mail-mark.is-outlook{background:#eaf4ff;color:#0364b8}.fdt-guide-card ol{display:grid;gap:15px;margin:19px 0 0;padding:0;list-style:none}.fdt-guide-card li{display:grid;grid-template-columns:30px minmax(0,1fr);gap:10px;align-items:start}.fdt-guide-card li>span{display:grid;place-items:center;width:28px;height:28px;border-radius:50%;background:#eef4ff;color:#155eef;font-size:12px;font-weight:800}.fdt-guide-card li p{margin:3px 0 0;color:#344054;line-height:1.55}.fdt-guide-tip{margin:18px 0 0;padding:13px 15px;border-radius:11px;background:#fffaeb;color:#7a4d00;line-height:1.5}.fdt-guide-tip strong{display:inline!important;color:#93370d}
@media(max-width:760px){.fdt-email-guide{padding:21px!important}.fdt-guide-grid{grid-template-columns:1fr}.fdt-guide-head{align-items:flex-start}.fdt-guide-card{padding:18px!important}}