:root {
  --ink: #0a0a0a;
  --ink-70: #0a0a0a;
  --muted: #6b6b6b;
  --muted-soft: #9a9a9a;
  --rule: #d9d9d9;
  --rule-soft: #ececec;
  --paper: #F4F4ED;
  --paper-card: #ffffff;
  --focus: #0a0a0a;
  --maxw: 960px;
  --gutter: clamp(20px, 4vw, 48px);
  --font-display: "Urbane", "Inter", -apple-system, BlinkMacSystemFont, "Helvetica Neue", Helvetica, Arial, sans-serif;
}

@font-face {
  font-family: "Urbane";
  src: url("fonts/Urbane-Bold.otf") format("opentype");
  font-weight: 700;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: "Urbane";
  src: url("fonts/Urbane-Light.otf") format("opentype");
  font-weight: 300;
  font-style: normal;
  font-display: swap;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: "Urbane", "Inter", -apple-system, BlinkMacSystemFont, "Helvetica Neue", Helvetica, Arial, sans-serif;
  font-weight: 300;
  font-feature-settings: "ss01", "cv11";
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

::selection { background: var(--ink); color: var(--paper); }

button { font-family: inherit; }

/* ---------- Page scaffold ---------- */
.page {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.site-header {
  padding: 22px var(--gutter);
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: var(--ink);
  color: #ffffff;
  font-size: 12.5px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}
.site-header__logo {
  display: inline-flex;
  align-items: center;
  line-height: 0;
}
.site-header__logo img {
  display: block;
  height: 44px;
  width: auto;
}
.site-header__eyebrow { color: rgba(255,255,255,0.65); }
.site-header__cohost { display: flex; gap: 14px; align-items: center; font-weight: 500; color: #ffffff; }
.site-header__cohost .dot { color: rgba(255,255,255,0.45); font-weight: 400; }
.site-header__cohost-logo {
  display: block;
  width: auto;
}
.site-header__cohost-logo--weber { height: 22px; }
.site-header__cohost-logo--aimhi { height: 30px; }

.main {
  flex: 1;
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

.site-footer {
  padding: 28px var(--gutter);
  margin-top: 80px;
  border-top: 1px solid var(--rule-soft);
  display: flex;
  justify-content: space-between;
  font-size: 12.5px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--muted);
}

/* ---------- Hero ---------- */
.hero {
  padding: clamp(56px, 9vw, 112px) 0 clamp(40px, 6vw, 64px);
  max-width: 820px;
}
.hero__title {
  font-family: var(--font-display);
  font-size: clamp(38px, 5.6vw, 64px);
  line-height: 1.02;
  letter-spacing: -0.025em;
  font-weight: 700;
  margin: 0 0 20px;
  text-wrap: balance;
}
.hero__sub {
  font-size: clamp(16px, 1.6vw, 19px);
  line-height: 1.5;
  color: var(--muted);
  max-width: 620px;
  margin: 0;
  text-wrap: pretty;
}

/* ---------- Scenario toggle ---------- */
.scenario-toggle {
  display: flex;
  flex-wrap: wrap;
  gap: 0;
  border-top: 1px solid var(--ink);
  border-bottom: 1px solid var(--rule-soft);
  margin: 24px 0 56px;
}
.scenario-toggle__item {
  flex: 1 1 240px;
  background: transparent;
  border: 0;
  border-right: 1px solid var(--rule-soft);
  padding: 18px 20px;
  text-align: left;
  cursor: pointer;
  color: var(--muted);
  font-size: 15px;
  letter-spacing: -0.005em;
  display: flex;
  align-items: baseline;
  gap: 10px;
  position: relative;
  transition: color 150ms ease, background 150ms ease;
}
.scenario-toggle__item:last-child { border-right: 0; }
.scenario-toggle__item:hover:not(:disabled) { color: var(--ink); background: rgba(0,0,0,0.02); }
.scenario-toggle__item:disabled { cursor: not-allowed; opacity: 0.55; }
.scenario-toggle__item.is-active { color: var(--ink); }
.scenario-toggle__item.is-active::after {
  content: "";
  position: absolute;
  left: 0; right: 0; top: -1px;
  height: 2px;
  background: var(--ink);
}
.scenario-toggle__num {
  font-variant-numeric: tabular-nums;
  font-weight: 500;
  letter-spacing: 0;
}
.scenario-toggle__slash { color: var(--muted-soft); }
.scenario-toggle__title {
  font-weight: 500;
  line-height: 1.3;
}

/* ---------- Brief ---------- */
.brief {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(28px, 4vw, 48px);
  padding: 8px 0 56px;
}
@media (min-width: 820px) {
  .brief { grid-template-columns: minmax(0, 1.45fr) minmax(0, 1fr); }
}

.brief__eyebrow {
  font-size: 11.5px;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 14px;
}

.brief__company {
  font-family: var(--font-display);
  font-size: clamp(26px, 2.8vw, 34px);
  letter-spacing: -0.02em;
  font-weight: 700;
  margin: 0 0 14px;
  line-height: 1.1;
}
.brief__body {
  font-size: 15.5px;
  line-height: 1.6;
  margin: 0 0 14px;
  color: #242424;
}
.brief__prompt {
  margin-top: 24px;
  padding-top: 20px;
  border-top: 1px solid var(--rule-soft);
}
.brief__prompt-label {
  display: inline-block;
  font-size: 11.5px;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  color: var(--ink);
  margin-bottom: 8px;
  padding: 3px 8px;
  border: 1px solid var(--ink);
}
.brief__prompt-text {
  font-size: 17px;
  line-height: 1.45;
  margin: 6px 0 0;
  font-weight: 500;
  letter-spacing: -0.005em;
  text-wrap: pretty;
}

.brief__col--persona {
  padding: 24px;
  background: var(--paper-card);
  border: 1px solid var(--rule);
  align-self: start;
  position: sticky;
  top: 24px;
}
.brief__persona-head {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 16px;
}
.brief__persona-photo {
  width: 60px;
  height: 60px;
  border-radius: 50%;
  object-fit: cover;
  flex-shrink: 0;
  background: var(--rule-soft);
}
.brief__persona-id { min-width: 0; }
.brief__persona-name {
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 700;
  letter-spacing: -0.015em;
  margin: 0;
  line-height: 1.1;
}
.brief__persona-role {
  margin: 4px 0 0;
  font-size: 12.5px;
  line-height: 1.35;
  color: var(--muted);
  letter-spacing: 0.01em;
}
.brief__traits {
  list-style: none;
  padding: 0;
  margin: 0 0 18px;
}
.brief__trait {
  font-size: 14px;
  line-height: 1.5;
  padding: 10px 0 10px 16px;
  border-top: 1px solid var(--rule-soft);
  position: relative;
  color: #242424;
}
.brief__trait:last-child { border-bottom: 1px solid var(--rule-soft); }
.brief__trait::before {
  content: "";
  position: absolute;
  left: 0;
  top: 18px;
  width: 8px;
  height: 1px;
  background: var(--ink);
}
.brief__quote {
  margin: 0;
  font-size: 15px;
  line-height: 1.45;
  font-style: italic;
  color: var(--ink);
  padding-left: 14px;
  border-left: 2px solid var(--ink);
}

/* ---------- Form ---------- */
.form {
  padding: 8px 0 0;
}
.field {
  padding: 28px 0;
  border-top: 1px solid var(--rule-soft);
}
.field:first-child { border-top: 1px solid var(--ink); }
.field__header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 20px;
  margin-bottom: 14px;
  flex-wrap: wrap;
}
.field__label {
  font-size: 17px;
  font-weight: 500;
  letter-spacing: -0.005em;
  display: inline-flex;
  align-items: baseline;
  gap: 12px;
}
.field__num {
  font-variant-numeric: tabular-nums;
  color: var(--muted-soft);
  font-weight: 500;
  font-size: 14px;
}
.field__hint {
  font-size: 13.5px;
  color: var(--muted);
  max-width: 420px;
  text-align: right;
  line-height: 1.45;
}
@media (max-width: 640px) {
  .field__hint { text-align: left; }
}
.field__textarea {
  width: 100%;
  border: 0;
  border-bottom: 1px solid var(--rule);
  background: transparent;
  resize: none;
  padding: 6px 0 14px;
  font-family: inherit;
  font-size: 16px;
  line-height: 1.55;
  color: var(--ink);
  outline: none;
  transition: border-color 150ms ease;
  overflow: hidden;
}
.field__textarea::placeholder { color: var(--muted-soft); }
.field__textarea:hover { border-bottom-color: var(--muted); }
.field__textarea:focus { border-bottom-color: var(--ink); }
.field__textarea:disabled { color: var(--muted); cursor: not-allowed; }

.form__submit-row {
  padding-top: 32px;
  border-top: 1px solid var(--ink);
  margin-top: 8px;
  display: flex;
  justify-content: flex-end;
}
.submit-btn {
  background: var(--ink);
  color: var(--paper);
  border: 1px solid var(--ink);
  padding: 16px 28px;
  font-size: 15px;
  font-weight: 500;
  letter-spacing: -0.005em;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 14px;
  transition: transform 160ms ease, background 160ms ease, color 160ms ease;
}
.submit-btn:hover:not(:disabled) {
  background: transparent;
  color: var(--ink);
}
.submit-btn:hover:not(:disabled) .submit-btn__arrow { transform: translateX(4px); }
.submit-btn:disabled { opacity: 0.35; cursor: not-allowed; }
.submit-btn__arrow {
  display: inline-block;
  transition: transform 200ms ease;
}

/* ---------- Submit error ---------- */
.form__error {
  margin-top: 18px;
  padding: 14px 18px;
  border: 1px solid #b42318;
  border-left-width: 3px;
  background: #fdf3f2;
  color: #7a271a;
  font-size: 14.5px;
  line-height: 1.5;
  display: flex;
  flex-direction: column;
  gap: 4px;
  animation: fadeIn 300ms ease both;
}
.form__error-label {
  font-size: 11.5px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-weight: 500;
  color: #b42318;
}

/* ---------- Response ---------- */
.response {
  margin-top: 72px;
  padding-top: 40px;
  border-top: 1px solid var(--ink);
  animation: fadeIn 400ms ease both;
}
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}
.response__header {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 20px;
  margin-bottom: 32px;
  flex-wrap: wrap;
}
.response__eyebrow {
  font-size: 11.5px;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 8px;
}
.response__title {
  font-family: var(--font-display);
  font-size: clamp(26px, 2.8vw, 34px);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin: 0;
  line-height: 1.15;
}
.response__title em {
  font-style: normal;
  border-bottom: 1px solid var(--ink);
  padding-bottom: 2px;
}

.refine-btn {
  background: transparent;
  border: 1px solid var(--ink);
  color: var(--ink);
  padding: 10px 16px;
  font-size: 13.5px;
  cursor: pointer;
  letter-spacing: -0.005em;
  transition: background 150ms ease, color 150ms ease;
}
.refine-btn:hover { background: var(--ink); color: var(--paper); }

.response__list {
  list-style: none;
  padding: 0;
  margin: 0;
}
.response__item {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  padding: 28px 0;
  border-top: 1px solid var(--rule-soft);
}
.response__item:last-child { border-bottom: 1px solid var(--rule-soft); }
@media (min-width: 780px) {
  .response__item {
    grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.4fr);
    gap: 40px;
  }
}
.response__q {
  display: flex;
  gap: 12px;
  align-items: flex-start;
}
.response__q-num {
  font-variant-numeric: tabular-nums;
  font-size: 13px;
  color: var(--muted-soft);
  font-weight: 500;
  padding-top: 3px;
}
.response__q-label {
  font-size: 15.5px;
  font-weight: 500;
  line-height: 1.4;
  color: var(--ink);
  letter-spacing: -0.005em;
}
.response__a p {
  margin: 0;
  font-size: 16px;
  line-height: 1.6;
  color: #242424;
  text-wrap: pretty;
  animation: fadeIn 360ms ease both;
}

/* ---------- Skeleton ---------- */
.skeleton { display: flex; flex-direction: column; gap: 8px; }
.skeleton__line {
  display: block;
  height: 12px;
  background: linear-gradient(90deg, #ececec 0%, #f5f5f5 50%, #ececec 100%);
  background-size: 200% 100%;
  animation: shimmer 1.4s linear infinite;
  border-radius: 1px;
}
@keyframes shimmer {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

/* ---------- Response — iteration comparison ---------- */
/* Answers sit in a wrapper grid so a question row can hold one or two takes. */
.response__answers { display: grid; gap: 16px; }
@media (min-width: 780px) {
  .response__answers--cols-2 { grid-template-columns: 1fr 1fr; gap: 32px; }
}

/* In compare mode give the answer columns more room than the question label. */
@media (min-width: 780px) {
  .response--compare .response__item {
    grid-template-columns: minmax(0, 0.55fr) minmax(0, 2fr);
    gap: 32px;
  }
}

/* Aligned iteration headers above the two answer columns (wide screens only). */
.response__colhead { display: none; }
@media (min-width: 780px) {
  .response__colhead {
    display: grid;
    grid-template-columns: minmax(0, 0.55fr) minmax(0, 2fr);
    gap: 32px;
    align-items: end;
    margin-bottom: 6px;
  }
}
.response__col-label {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--rule);
}
.response__col-label.is-latest { border-bottom-color: var(--ink); }
.response__col-iter {
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
  font-weight: 500;
  display: inline-flex;
  align-items: center;
  gap: 10px;
}
.response__col-tag {
  font-style: normal;
  font-size: 10.5px;
  letter-spacing: 0.06em;
  background: var(--ink);
  color: var(--paper);
  padding: 2px 7px;
  border-radius: 2px;
}

/* On narrow screens the two takes stack, so each answer is tagged inline. */
.response__a-tag {
  display: block;
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted-soft);
  font-weight: 500;
  margin-bottom: 6px;
}
@media (min-width: 780px) {
  .response__a-tag { display: none; }
}

/* Collapsible "what produced this take" disclosure in each iteration header. */
.response__inputs { font-size: 13px; }
.response__inputs > summary {
  cursor: pointer;
  color: var(--muted);
  font-size: 12px;
  letter-spacing: 0.02em;
}
.response__inputs-list {
  margin: 10px 0 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.response__inputs-row dt {
  font-size: 10.5px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--muted-soft);
}
.response__inputs-row dd {
  margin: 3px 0 0;
  font-size: 13.5px;
  line-height: 1.5;
  color: #3a3a3a;
}
.response__inputs-empty { color: var(--muted-soft); }

/* ---------- Focus ring (keyboard) ---------- */
:focus-visible {
  outline: 2px solid var(--ink);
  outline-offset: 3px;
}
textarea:focus-visible { outline: 0; }

/* ---------- Small screen ---------- */
@media (max-width: 640px) {
  .site-header { flex-direction: column; gap: 6px; align-items: flex-start; }
  .brief__col--persona { position: static; }
}