/* ============================================================================
   Visitor surface — signature interactions.
   Per brand_kit_andrewalbin.md §5b. Each interaction is a discrete component.
   ============================================================================ */

.signature-interaction {
  display: block;
  margin: var(--vs-space-4) 0;
}

/* --- 1. Adaptive Arrival -------------------------------------------------- */
.signature-adaptive-arrival {
  display: flex;
  flex-direction: column;
  gap: var(--vs-space-2);
}
.signature-adaptive-arrival__headline {
  font-family: var(--vs-font-display);
  font-size: var(--vs-step-5);
  line-height: 1.05;
  margin: 0;
  font-weight: 400;
  letter-spacing: -0.01em;
}
.signature-adaptive-arrival__lede {
  font-size: var(--vs-step-2);
  color: var(--vs-fg-secondary);
  max-width: var(--vs-container-narrow);
  margin: 0;
}
.signature-adaptive-arrival__meta {
  font-size: 0.78rem;
  color: var(--vs-fg-muted);
  margin: 0;
  font-family: var(--vs-font-mono);
  letter-spacing: 0.04em;
}

/* --- 2. Andy Conversational ---------------------------------------------- */
.signature-andy-conversational {
  border: 1px solid var(--vs-border-strong);
  padding: var(--vs-space-3);
  display: flex;
  flex-direction: column;
  gap: var(--vs-space-2);
  background: var(--vs-bg-raised);
}
.signature-andy-conversational__heading {
  font-family: var(--vs-font-display);
  font-size: var(--vs-step-2);
  margin: 0;
  font-weight: 400;
}
.signature-andy-conversational__prompts {
  display: flex;
  flex-wrap: wrap;
  gap: var(--vs-space-1);
  list-style: none;
  padding: 0;
  margin: 0;
}
.signature-andy-conversational__prompt {
  font-size: 0.92rem;
  border: 1px solid var(--vs-border-strong);
  padding: 6px 12px;
  background: transparent;
  cursor: pointer;
  font-family: inherit;
  color: var(--vs-fg-secondary);
}
.signature-andy-conversational__prompt:hover { color: var(--vs-fg); border-color: var(--vs-accent); }
.signature-andy-conversational__form {
  display: flex;
  flex-direction: column;
  gap: var(--vs-space-1);
}
.signature-andy-conversational__input {
  font-family: inherit;
  font-size: var(--vs-step-1);
  padding: 12px;
  border: 1px solid var(--vs-border-strong);
  background: var(--vs-bg);
  color: var(--vs-fg);
  resize: vertical;
}
.signature-andy-conversational__submit {
  align-self: flex-start;
  font-family: inherit;
  font-size: 0.92rem;
  background: var(--vs-fg);
  color: var(--vs-bg);
  border: 0;
  padding: 10px 18px;
  cursor: pointer;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

/* --- 3. Generative Typography -------------------------------------------- */
.signature-generative-typography {
  font-family: var(--vs-font-display);
  font-size: var(--vs-step-4);
  font-weight: 400;
  line-height: 1.1;
  margin: 0;
  letter-spacing: -0.01em;
}
.signature-generative-typography__word {
  display: inline-block;
  margin-right: 0.25em;
  transition: font-weight 600ms ease, letter-spacing 600ms ease, color 600ms ease;
}
.signature-generative-typography__word[data-weight="light"] { font-weight: 300; }
.signature-generative-typography__word[data-weight="regular"] { font-weight: 400; }
.signature-generative-typography__word[data-weight="bold"] { font-weight: 600; color: var(--vs-accent); }

/* --- 4. Responsive Gallery ----------------------------------------------- */
.signature-responsive-gallery {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: var(--vs-space-3);
  list-style: none;
  padding: 0;
  margin: 0;
}
.signature-responsive-gallery__item {
  border: 1px solid var(--vs-border);
  padding: var(--vs-space-3);
  background: var(--vs-bg-raised);
  display: flex;
  flex-direction: column;
  gap: 6px;
  transition: border-color 300ms ease, transform 300ms ease;
}
.signature-responsive-gallery__item:hover {
  border-color: var(--vs-accent);
  transform: translateY(-1px);
}
.signature-responsive-gallery__link {
  font-family: var(--vs-font-display);
  font-size: var(--vs-step-2);
  border-bottom: 0;
  color: var(--vs-fg);
}
.signature-responsive-gallery__meta {
  font-size: 0.82rem;
  color: var(--vs-fg-muted);
  font-family: var(--vs-font-mono);
}

/* --- 5. Case Study Dialog ----------------------------------------------- */
.signature-case-study-dialog {
  border: 1px solid var(--vs-border-strong);
  padding: var(--vs-space-3);
  background: var(--vs-bg-raised);
  display: flex;
  flex-direction: column;
  gap: var(--vs-space-2);
}
.signature-case-study-dialog__heading {
  font-family: var(--vs-font-display);
  font-size: var(--vs-step-2);
  margin: 0;
  font-weight: 400;
}
.signature-case-study-dialog__questions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--vs-space-1);
  list-style: none;
  padding: 0;
  margin: 0;
}
.signature-case-study-dialog__question {
  font-size: 0.9rem;
  padding: 8px 14px;
  border: 1px solid var(--vs-border-strong);
  background: transparent;
  cursor: pointer;
  font-family: inherit;
  color: var(--vs-fg-secondary);
}
.signature-case-study-dialog__transcript {
  border-top: 1px dashed var(--vs-border-strong);
  padding-top: var(--vs-space-2);
  font-style: italic;
  color: var(--vs-fg-secondary);
}

/* --- 6. Atmospheric Essay Reader ---------------------------------------- */
.signature-atmospheric-essay {
  display: flex;
  flex-direction: column;
  gap: var(--vs-space-4);
}
.signature-atmospheric-essay__section {
  padding: var(--vs-space-3);
  border-left: 3px solid var(--vs-border-strong);
  transition: border-color 600ms ease, background-color 600ms ease;
}
.signature-atmospheric-essay__section[data-essay-atmosphere="cool"] {
  border-color: #6f8ba1;
  background: rgba(111, 139, 161, 0.06);
}
.signature-atmospheric-essay__section[data-essay-atmosphere="warm"] {
  border-color: #a8501f;
  background: rgba(168, 80, 31, 0.06);
}
.signature-atmospheric-essay__section[data-essay-atmosphere="hush"] {
  border-color: #8a7a68;
  background: transparent;
}
.signature-atmospheric-essay__heading {
  font-family: var(--vs-font-display);
  font-size: var(--vs-step-2);
  font-weight: 400;
  margin: 0 0 var(--vs-space-1);
}

/* --- 7. Sculpture Explorer ---------------------------------------------- */
.signature-sculpture-explorer {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--vs-space-3);
}
@media (min-width: 720px) {
  .signature-sculpture-explorer {
    grid-template-columns: 2fr 1fr;
  }
}
.signature-sculpture-explorer__stage {
  border: 1px solid var(--vs-border-strong);
  background: var(--vs-bg-raised);
  padding: var(--vs-space-4);
  min-height: 320px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.signature-sculpture-explorer__stage-figure {
  font-family: var(--vs-font-display);
  font-size: var(--vs-step-3);
  text-align: center;
  color: var(--vs-fg-secondary);
}
.signature-sculpture-explorer__panel {
  display: flex;
  flex-direction: column;
  gap: var(--vs-space-3);
}
.signature-sculpture-explorer__group-title {
  font-family: var(--vs-font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--vs-fg-muted);
  margin: 0;
}
.signature-sculpture-explorer__options {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}
.signature-sculpture-explorer__option {
  font-family: inherit;
  font-size: 0.9rem;
  padding: 6px 12px;
  border: 1px solid var(--vs-border-strong);
  background: transparent;
  cursor: pointer;
  color: var(--vs-fg-secondary);
}
.signature-sculpture-explorer__option[aria-pressed="true"] {
  background: var(--vs-fg);
  color: var(--vs-bg);
}
.signature-sculpture-explorer__material {
  font-family: var(--vs-font-mono);
  font-size: 0.82rem;
  color: var(--vs-fg-muted);
}