/* /empezar-proyecto — wizard de 5 pasos. Nav mínima a propósito (solo
   "← INEDITO", sin el menú completo) para no distraer durante el flujo de
   conversión — mismo criterio que cualquier formulario multi-paso real.
   Tokens y .embossed/.btn-hot vienen de brand-tokens.css. */

* { box-sizing: border-box; }
.brief-body { margin: 0; padding: 0; background: var(--ink); color: var(--text-ink); font-family: var(--font-b); -webkit-font-smoothing: antialiased; overflow-x: hidden; }
a { color: inherit; text-decoration: none; }
button { font-family: inherit; }
:focus-visible { outline: 2px solid var(--coral); outline-offset: 2px; }
@media (prefers-reduced-motion: reduce) { * { animation: none !important; transition: none !important; } }

.brief-shell { position: relative; min-height: 100vh; overflow: hidden; display: flex; flex-direction: column; }
.brief-blob { position: absolute; width: 800px; height: 800px; border-radius: 50%; background: radial-gradient(circle, rgba(255,90,54,.2), transparent 65%); top: -320px; right: -220px; filter: blur(15px); pointer-events: none; }
.brief-blob2 { position: absolute; width: 600px; height: 600px; border-radius: 50%; background: radial-gradient(circle, rgba(217,169,78,.16), transparent 65%); bottom: -260px; left: -160px; filter: blur(15px); pointer-events: none; }

.brief-top { position: relative; z-index: 2; display: flex; align-items: center; justify-content: space-between; padding: 32px 64px 0; }
.brief-back { font: 800 12px/1 var(--font-b); letter-spacing: .06em; text-transform: uppercase; color: var(--text-ink-soft); display: flex; align-items: center; gap: 8px; transition: color .2s; }
.brief-back:hover { color: #fff; }
.brief-progress { display: flex; align-items: center; gap: 12px; }
.brief-progress-text { font: 800 11px/1 var(--font-b); letter-spacing: .1em; color: var(--coral); font-variant-numeric: tabular-nums; }
.brief-dots { display: flex; gap: 6px; }
.brief-dots span { width: 26px; height: 3px; border-radius: 2px; background: var(--line-ink); transition: background .3s; }
.brief-dots span.active { background: linear-gradient(90deg, var(--coral), var(--gold)); }
.brief-dots span.done { background: var(--gold-dark); }

form#briefForm { flex: 1; display: flex; flex-direction: column; }
.brief-main { position: relative; z-index: 2; max-width: 1020px; margin: 0 auto; padding: 56px 64px 0; text-align: center; flex: 1; display: flex; flex-direction: column; align-items: center; justify-content: center; }
.brief-kicker { font: 800 11.5px/1 var(--font-b); letter-spacing: .16em; text-transform: uppercase; color: var(--coral); margin-bottom: 22px; }
.brief-main h1, .brief-main h2 { font-size: clamp(30px, 5vw, 60px); line-height: 1; margin-bottom: 16px; }
.brief-main .sub { font: 500 16px/1.5 var(--font-b); color: var(--text-ink-soft); margin: 0 0 48px; max-width: 56ch; }

.brief-options { display: grid; grid-template-columns: repeat(5, 1fr); gap: 14px; text-align: left; width: 100%; }
.brief-options--4 { grid-template-columns: repeat(4, 1fr); }
.brief-opt {
  font-family: inherit; text-align: left; border: 1px solid var(--line-ink); border-radius: 14px; padding: 26px 20px;
  background: none; color: inherit; position: relative; overflow: hidden; cursor: pointer;
  transition: transform .3s ease, border-color .3s ease;
}
.brief-opt::before { content: ''; position: absolute; inset: 0; background: linear-gradient(160deg, rgba(255,90,54,.14), rgba(217,169,78,.08)); opacity: 0; transition: opacity .3s ease; }
.brief-opt:hover { transform: translateY(-6px); border-color: rgba(255,90,54,.5); }
.brief-opt:hover::before { opacity: 1; }
.brief-opt.selected { border-color: var(--coral); background: rgba(255,90,54,.08); }
.brief-opt.selected::before { opacity: 1; }
.brief-opt-check { position: absolute; top: 14px; right: 14px; width: 22px; height: 22px; border-radius: 50%; border: 1.5px solid var(--line-ink); display: flex; align-items: center; justify-content: center; z-index: 1; font-size: 11px; color: #fff; }
.brief-opt.selected .brief-opt-check { background: var(--coral); border-color: var(--coral); }
.brief-opt-mark { font-family: var(--font-d); font-size: 32px; color: var(--gold); margin-bottom: 20px; position: relative; z-index: 1; }
.brief-opt .label { position: relative; z-index: 1; font: 700 15px/1.35 var(--font-b); display: block; }
.brief-options--4 .brief-opt { display: flex; align-items: center; min-height: 84px; padding: 20px 44px 20px 20px; }

.brief-textarea {
  width: 100%; max-width: 640px; background: rgba(255,255,255,.03); border: 1px solid var(--line-ink); border-radius: 12px;
  padding: 18px 20px; color: #fff; font: 400 15px/1.6 var(--font-b); resize: vertical; outline: none; transition: border-color .2s;
}
.brief-textarea:focus { border-color: var(--coral); }
.brief-textarea::placeholder { color: var(--neutral-on-ink); }

.brief-form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; width: 100%; max-width: 640px; text-align: left; }
.brief-field { display: flex; flex-direction: column; gap: 8px; font: 800 10.5px/1 var(--font-b); letter-spacing: .08em; text-transform: uppercase; color: var(--neutral-on-ink); }
.brief-field--full { grid-column: 1 / -1; }
.brief-field input, .brief-field textarea {
  background: rgba(255,255,255,.03); border: 1px solid var(--line-ink); border-radius: 8px; padding: 13px 15px;
  font: 400 14px/1 var(--font-b); color: #fff; outline: none; transition: border-color .2s; resize: vertical; width: 100%;
}
.brief-field textarea { font: 400 14px/1.5 var(--font-b); }
.brief-field input:focus, .brief-field textarea:focus { border-color: var(--coral); }
.brief-field input::placeholder, .brief-field textarea::placeholder { color: var(--neutral-on-ink); }

.brief-captcha { margin: 20px auto 0; }
#briefAlert { max-width: 640px; margin: 0 auto; width: 100%; }
.brief-alert { padding: 12px 15px; border-radius: 8px; font: 400 13px/1.4 var(--font-b); margin-top: 16px; text-align: left; }
.brief-alert-ok { background: rgba(127,168,118,.15); color: #7fa876; }
.brief-alert-error { background: rgba(224,87,74,.15); color: #e0574a; }

.brief-cta-row { position: relative; z-index: 2; display: flex; align-items: center; justify-content: center; gap: 20px; padding: 40px 64px; flex-wrap: wrap; }
.brief-skip { font: 400 12px/1 var(--font-b); color: var(--text-ink-soft); text-decoration: underline; text-underline-offset: 3px; transition: color .2s; }
.brief-skip:hover { color: #fff; }
#briefNext, #briefBack { border: none; cursor: pointer; }
/* .btn-hot fija su propio `display`, así que pisa por encima el `display:
   none` que el navegador le da por defecto a [hidden] — hay que devolvérselo
   a mano o el botón "Atrás" se ve activo en el paso 1 igual. */
#briefBack[hidden] { display: none; }
#briefNext:disabled { opacity: .4; cursor: not-allowed; }
#briefNext:disabled:hover { transform: none; box-shadow: none; }
#briefNext:disabled::before { display: none; }

.brief-flow { position: relative; z-index: 2; border-top: 1px solid var(--line-ink); padding: 40px 64px; max-width: 1200px; margin: 0 auto; width: 100%; }
.brief-flow-inner { display: flex; align-items: flex-start; justify-content: center; gap: 0; flex-wrap: wrap; }
.brief-flow-step { display: flex; flex-direction: column; align-items: center; gap: 10px; padding: 0 26px; position: relative; }
.brief-flow-step:not(:last-child)::after { content: ''; position: absolute; top: 15px; right: -2px; width: 24px; height: 1px; background: var(--line-ink); }
.brief-flow-num { width: 30px; height: 30px; border-radius: 50%; border: 1px solid var(--line-ink); display: flex; align-items: center; justify-content: center; font: 800 11px/1 var(--font-b); color: var(--text-ink-soft); transition: all .3s; }
.brief-flow-step.now .brief-flow-num { background: linear-gradient(135deg, var(--coral), var(--gold)); border-color: transparent; color: #fff; }
.brief-flow-step.done .brief-flow-num { background: var(--gold-dark); border-color: transparent; color: #fff; }
.brief-flow-label { font: 700 10.5px/1 var(--font-b); letter-spacing: .04em; text-transform: uppercase; color: var(--neutral-on-ink); text-align: center; max-width: 92px; }
.brief-flow-step.now .brief-flow-label { color: #fff; }

@media (max-width: 880px) {
  .brief-top { padding: 22px 22px 0; }
  .brief-main { padding: 40px 22px 0; }
  .brief-options, .brief-options--4 { grid-template-columns: 1fr 1fr; }
  .brief-cta-row { padding: 32px 22px; }
  .brief-flow { padding: 32px 22px; }
  .brief-flow-step:not(:last-child)::after { display: none; }
  .brief-form-grid { grid-template-columns: 1fr; }
}
@media (max-width: 560px) {
  .brief-options, .brief-options--4 { grid-template-columns: 1fr; }
}