.brief-shell { padding-top: clamp(80px, 12vw, 150px); padding-bottom: clamp(80px, 12vw, 150px); }
.brief-hero { max-width: 760px; }
.brief-hero h1 {
  max-width: 9ch;
  margin: 22px 0 24px;
  font-size: clamp(62px, 10vw, 142px);
  line-height: .8;
  letter-spacing: -.09em;
  text-wrap: balance;
}
.brief-hero > p:last-child { max-width: 48ch; margin: 0; color: rgba(238, 240, 231, .72); font-size: 18px; line-height: 1.45; }
.brief-layout { display: grid; grid-template-columns: .68fr 1.32fr; gap: clamp(36px, 8vw, 130px); align-items: start; margin-top: clamp(70px, 10vw, 130px); }
.brief-aside { position: sticky; top: 104px; }
.brief-aside ol { display: grid; gap: 24px; padding: 0; margin: 30px 0 0; list-style: none; counter-reset: brief-step; }
.brief-aside li { display: grid; grid-template-columns: 34px 1fr; gap: 10px; counter-increment: brief-step; }
.brief-aside li::before { content: counter(brief-step, decimal-leading-zero); color: var(--case-acid); font: 11px var(--case-mono); }
.brief-aside strong { display: block; font-size: 18px; letter-spacing: -.04em; }
.brief-aside li span { display: block; margin-top: 6px; color: rgba(238, 240, 231, .6); font: 11px/1.45 var(--case-mono); }
.brief-aside__note { max-width: 30ch; margin: 55px 0 0; padding-top: 18px; border-top: 1px solid rgba(238, 240, 231, .28); color: rgba(238, 240, 231, .58); font: 10px/1.5 var(--case-mono); }
.brief-form { padding: clamp(22px, 4vw, 48px); border: 1px solid rgba(238, 240, 231, .35); background: rgba(238, 240, 231, .06); }
.brief-form__head { display: flex; justify-content: space-between; gap: 20px; padding-bottom: 22px; border-bottom: 1px solid rgba(238, 240, 231, .28); }
.brief-required { color: var(--case-pink); font: 9px var(--case-mono); }
.brief-form__grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.brief-field { display: grid; gap: 8px; margin-top: 24px; }
.brief-field label { font: 11px var(--case-mono); }
.brief-field label span { color: var(--case-acid); }
.brief-field input,
.brief-field select,
.brief-field textarea,
.brief-success textarea {
  width: 100%;
  border: 1px solid rgba(238, 240, 231, .38);
  border-radius: 0;
  padding: 13px 14px;
  background: rgba(16, 17, 15, .7);
  color: var(--case-cream);
  font: 14px/1.35 var(--case-sans);
  transition: border-color .2s, background .2s, transform .2s;
}
.brief-field textarea { resize: vertical; min-height: 150px; }
.brief-field select { appearance: none; background-image: linear-gradient(45deg, transparent 50%, var(--case-acid) 50%), linear-gradient(135deg, var(--case-acid) 50%, transparent 50%); background-position: calc(100% - 17px) 50%, calc(100% - 12px) 50%; background-size: 5px 5px, 5px 5px; background-repeat: no-repeat; }
.brief-field input::placeholder,
.brief-field textarea::placeholder { color: rgba(238, 240, 231, .56); }
.brief-field input:hover,
.brief-field select:hover,
.brief-field textarea:hover { border-color: rgba(216, 255, 54, .7); }
.brief-field input:focus,
.brief-field select:focus,
.brief-field textarea:focus { outline: 0; border-color: var(--case-acid); background: rgba(16, 17, 15, .95); }
.brief-field input[aria-invalid="true"],
.brief-field select[aria-invalid="true"],
.brief-field textarea[aria-invalid="true"] { border-color: var(--case-orange); }
.brief-error { min-height: 13px; color: var(--case-orange); font: 9px var(--case-mono); }
.brief-submit {
  display: inline-flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-width: 210px;
  margin-top: 30px;
  padding: 15px 17px;
  border: 0;
  background: var(--case-acid);
  color: var(--case-ink);
  cursor: pointer;
  font: 11px var(--case-mono);
  text-transform: uppercase;
  transition: transform .25s cubic-bezier(.2, .75, .2, 1), background .25s;
}
.brief-submit:hover,
.brief-submit:focus-visible { transform: translateY(-3px) rotate(-1deg); background: var(--case-orange); }
.brief-submit:active { transform: translateY(1px) scale(.98); }
.brief-submit--pink { background: var(--case-pink); }
.brief-submit--pink:hover,
.brief-submit--pink:focus-visible { background: var(--case-cream); }
.brief-helper { margin: 14px 0 0; color: rgba(238, 240, 231, .55); font: 10px/1.4 var(--case-mono); }
.brief-helper strong { color: var(--case-cream); font-weight: 400; }
.brief-feedback { min-height: 16px; margin: 13px 0 0; color: var(--case-orange); font: 10px/1.4 var(--case-mono); }
.brief-feedback.is-success { color: var(--case-acid); }
.brief-success { display: grid; grid-template-columns: .72fr 1.28fr; gap: 28px 70px; align-items: start; margin-top: 100px; padding: clamp(26px, 5vw, 65px); background: var(--case-pink); color: var(--case-ink); }
.brief-success h2 { max-width: 8ch; margin: 15px 0 0; font-size: clamp(48px, 7vw, 96px); line-height: .83; letter-spacing: -.08em; }
.brief-success > div:first-child > p:last-child { max-width: 31ch; margin: 24px 0 0; font-size: 16px; line-height: 1.35; }
.brief-success textarea { grid-column: 2; grid-row: 1 / span 2; min-height: 260px; background: rgba(16, 17, 15, .92); color: var(--case-cream); border-color: var(--case-ink); }
.brief-success__actions { grid-column: 1 / -1; display: flex; flex-wrap: wrap; gap: 12px; align-items: center; }
.brief-success__actions .brief-submit { margin-top: 0; }
.brief-text-button { border: 0; padding: 10px 0; background: transparent; color: var(--case-ink); cursor: pointer; font: 10px var(--case-mono); text-decoration: underline; text-underline-offset: 4px; }
.brief-text-button:hover,
.brief-text-button:focus-visible { color: var(--case-blue); }
.brief-success > .brief-feedback { grid-column: 1 / -1; color: var(--case-ink); }

@media (max-width: 820px) {
  .brief-shell { padding-top: 80px; }
  .brief-layout { grid-template-columns: 1fr; margin-top: 72px; }
  .brief-aside { position: static; }
  .brief-aside__note { margin-top: 32px; }
  .brief-success { grid-template-columns: 1fr; margin-top: 72px; }
  .brief-success textarea { grid-column: auto; grid-row: auto; }
  .brief-success__actions { grid-column: auto; }
}

@media (max-width: 540px) {
  .brief-shell { padding-inline: 16px; }
  .brief-form__grid { grid-template-columns: 1fr; gap: 0; }
  .brief-form { padding: 20px 16px; }
  .brief-form__head { display: block; }
  .brief-required { display: block; margin-top: 10px; }
  .brief-submit { width: 100%; }
  .brief-success { margin-inline: 0; padding: 22px 16px; }
}