.brief-page{min-height:100vh;background:var(--bg);color:var(--ink)}
.brief-header{padding-top:22px}
.brief-nav{height:62px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line)}
.brief-back{font-family:var(--mono);font-size:.56rem;color:var(--muted);text-transform:uppercase;letter-spacing:.05em}
.brief-back:hover{color:var(--blue)}
.brief-main{padding:65px 0 100px}
.brief-layout{display:grid;grid-template-columns:.66fr 1.34fr;gap:75px;align-items:start}
.brief-intro{position:sticky;top:35px}
.brief-intro h1{font-size:clamp(3rem,4.8vw,5.1rem);line-height:.94;letter-spacing:-.06em;font-weight:600;margin:24px 0}
.brief-intro h1 i,.brief-step h2 i,.brief-done h2 i{font-family:inherit;font-style:normal;color:inherit;font-weight:inherit}
.brief-intro>p{max-width:460px;color:var(--text);font-size:.78rem;line-height:1.65}
.brief-principles{margin-top:44px;border-top:1px solid var(--line)}
.brief-principles>div{display:grid;grid-template-columns:34px 1fr;gap:10px;padding:17px 0;border-bottom:1px solid var(--line)}
.brief-principles span{grid-row:1/3;font-family:var(--mono);font-size:.52rem;color:var(--blue)}.brief-principles b{font-size:.7rem}.brief-principles small{font-size:.58rem;color:var(--muted)}

.brief-panel{background:var(--navy);border-radius:8px;padding:17px;box-shadow:14px 16px 0 #d9dde9}
.brief-progress{padding:12px 14px 22px}.brief-progress>div:first-child{display:flex;justify-content:space-between;font-family:var(--mono);font-size:.49rem;color:#8e95a2;letter-spacing:.06em}.progress-track{height:3px;background:#343b4b;margin-top:13px}.progress-track i{display:block;height:100%;width:20%;background:#93a5ff;transition:width .3s}
#project-brief{min-height:630px;padding:40px;background:var(--surface);border-radius:5px;display:flex;flex-direction:column}
.brief-step{display:none;animation:brief-in .3s ease}.brief-step.active{display:block}
@keyframes brief-in{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:none}}
.step-kicker{display:block;font-family:var(--mono);font-size:.52rem;color:var(--blue);letter-spacing:.06em}
.brief-step h2,.brief-done h2{font-size:clamp(2.5rem,3.7vw,4rem);line-height:.96;letter-spacing:-.055em;font-weight:600;margin:14px 0}
.step-hint{max-width:620px;color:var(--text);font-size:.68rem;line-height:1.6;margin-bottom:25px}

.brief-field{display:block;margin-top:16px}.brief-field>span,.field-label,.stage-wrap>span{display:block;margin-bottom:7px;font-family:var(--mono);font-size:.49rem;color:#59606b;text-transform:uppercase;letter-spacing:.05em}
.brief-field input,.brief-field textarea{width:100%;border:1px solid var(--line);background:#fafafa;border-radius:4px;padding:13px 14px;outline:none;font-size:.75rem;line-height:1.55;resize:vertical;transition:border-color .2s,box-shadow .2s}
.brief-field input:focus,.brief-field textarea:focus{border-color:var(--blue);box-shadow:0 0 0 3px rgba(49,85,213,.1)}
.symptom-label,.context-label,.timing-label{margin-top:21px}

.integration-options,.compact-options{display:flex;flex-wrap:wrap;gap:7px;margin-bottom:20px}.integration-options label,.compact-options label{position:relative;cursor:pointer}.integration-options input,.compact-options input,.budget-options input{position:absolute;opacity:0;pointer-events:none}
.integration-options span,.compact-options span{display:block;padding:9px 12px;border:1px solid var(--line);border-radius:3px;background:#fff;font-size:.57rem;font-weight:500;transition:.18s}
.integration-options input:checked+span,.compact-options input:checked+span{background:var(--blue-soft);border-color:var(--blue);color:var(--blue-dark)}
.symptom-options{margin-bottom:0}.frequency-options{margin-bottom:18px}

.budget-options{display:grid;grid-template-columns:1fr 1fr;gap:8px}.budget-options label{position:relative;cursor:pointer}.budget-options span{display:block;padding:13px;border:1px solid var(--line);border-radius:4px;background:#fff;transition:.18s}.budget-options b,.budget-options small{display:block}.budget-options b{font-size:.72rem}.budget-options small{font-size:.51rem;color:var(--muted);margin-top:2px}.budget-options input:checked+span{border-color:var(--blue);background:var(--blue-soft)}.budget-options input:checked+span b{color:var(--blue-dark)}
.field-pair{display:grid;grid-template-columns:1fr 1fr;gap:11px}
.privacy-check{display:flex;align-items:flex-start;gap:9px;margin-top:15px;color:var(--muted);font-size:.55rem;cursor:pointer}.privacy-check input{margin-top:2px;accent-color:var(--blue)}
.honeypot{position:absolute!important;left:-9999px!important;opacity:0!important}
.field-error,.submit-error{display:none;margin-top:10px;color:#b33d32;font-size:.56rem;font-weight:600}.field-error.show,.submit-error.show{display:block}

.brief-nav-actions{margin-top:auto;padding-top:28px;display:flex;align-items:center;justify-content:space-between;gap:14px}.brief-prev{border:0;background:none;color:var(--muted);font-size:.65rem;font-weight:600;padding:10px}.brief-nav-actions .button{margin-left:auto}.submit-error a{text-decoration:underline}
.brief-done{display:none;margin:auto 0}.brief-done.active{display:block;animation:brief-in .3s ease}.brief-done>p{max-width:540px;color:var(--text);font-size:.72rem;margin-bottom:23px}.done-mark{width:43px;height:43px;display:grid;place-items:center;background:var(--blue);color:#fff;border-radius:4px;font-weight:700;margin-bottom:20px}
.button.loading{pointer-events:none;opacity:.65}

@media(max-width:1000px){
  .brief-layout{grid-template-columns:1fr;gap:45px}.brief-intro{position:static}.brief-intro>p{max-width:650px}.brief-principles{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;border-top:0}.brief-principles>div{grid-template-columns:1fr;padding:15px;border:1px solid var(--line);border-radius:4px}.brief-principles span{grid-row:auto}
}
@media(max-width:760px){
  .brief-header{padding-top:8px}.brief-nav{height:54px}.brief-main{padding:40px 0 65px}.brief-layout{width:calc(100vw - 28px);max-width:calc(100vw - 28px);min-width:0}.brief-layout>*{min-width:0}
  .brief-intro h1{font-size:3rem}.brief-principles{grid-template-columns:1fr}.brief-panel{padding:8px;box-shadow:7px 8px 0 #d9dde9}.brief-progress{padding:10px 9px 18px}
  #project-brief{min-width:0;min-height:660px;padding:27px 19px}.brief-step{min-width:0}.brief-step h2,.brief-done h2{font-size:2.65rem}.budget-options,.field-pair{grid-template-columns:1fr}.brief-back{font-size:.5rem}
}
@media(max-width:390px){.brief-intro h1{font-size:2.7rem}#project-brief{padding-inline:16px}.brief-step h2,.brief-done h2{font-size:2.4rem}}