/* ICON 2026 presenter form
 * Multi-step, considered, minimal. Warm off-white + deep ink + sage accent.
 * One column, generous whitespace, serif headings, system sans body. */

:root {
  --bg:        #f7f4ee;       /* warm off-white page */
  --paper:    #fefcf7;        /* card surface */
  --ink:       #1c1a16;       /* deep warm black for headings */
  --text:      #2d2a25;       /* body text */
  --muted:     #6b6660;       /* secondary text */
  --hairline:  #e3ddcf;       /* subtle border */
  --hairline-strong: #c8c0ad;
  --sage:      #4a7c74;       /* primary accent — muted teal/sage */
  --sage-deep: #355a55;
  --sage-tint: #e9f0ee;
  --sand:      #f0eadb;       /* callout background */
  --rust:      #b85c3c;       /* error / required */
  --rust-tint: #fbeae3;
  --shadow-sm: 0 1px 2px rgba(28, 26, 22, 0.04), 0 1px 1px rgba(28, 26, 22, 0.03);
  --shadow:    0 4px 16px rgba(28, 26, 22, 0.06), 0 1px 2px rgba(28, 26, 22, 0.04);
  --radius:    6px;
  --radius-lg: 10px;
  --serif:     "Cormorant Garamond", "EB Garamond", Garamond, "Adobe Caslon Pro", "Hoefler Text", "Times New Roman", Times, ui-serif, Georgia, serif;
  --sans:      ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --maxw:      640px;
  --t-fast:    160ms;
  --t-norm:    260ms;
  --ease:      cubic-bezier(0.4, 0, 0.2, 1);
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a { color: var(--sage-deep); text-decoration: underline; text-underline-offset: 2px; }
a:hover { color: var(--ink); }

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

.page {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.skip-link {
  position: absolute;
  left: 0.75rem;
  top: -40px;
  z-index: 100;
  background: var(--ink);
  color: var(--paper);
  padding: 0.5rem 0.85rem;
  border-radius: var(--radius);
  text-decoration: none;
  font-size: 0.85rem;
  transition: top var(--t-fast) var(--ease);
}
.skip-link:focus {
  top: 0.5rem;
  outline: 2px solid var(--sage-deep);
  outline-offset: 2px;
}

/* ---------- Masthead ---------- */

.masthead {
  position: sticky;
  top: 0;
  z-index: 10;
  background: var(--paper);
  border-bottom: 1px solid var(--hairline);
  backdrop-filter: blur(6px);
}
.masthead-inner {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0.85rem 1.25rem 0.6rem;
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
}
.masthead-mark {
  font-family: var(--serif);
  font-weight: 500;
  letter-spacing: 0.04em;
  color: var(--ink);
  font-size: 1.05rem;
}
.masthead-tag {
  color: var(--muted);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.progress {
  height: 2px;
  background: var(--hairline);
  width: 100%;
  position: relative;
  overflow: hidden;
}
.progress-bar {
  height: 100%;
  width: 0%;
  background: var(--sage);
  transition: width var(--t-norm) var(--ease);
}
.progress-label {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0.3rem 1.25rem 0.5rem;
  color: var(--muted);
  font-size: 0.74rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  text-align: right;
  font-variant-numeric: tabular-nums;
}
.progress-label .of { opacity: 0.6; margin: 0 0.25em; }

/* ---------- Stage / steps ---------- */

.stage {
  flex: 1;
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 2rem 1.25rem 4rem;
}

form#presenter-form { margin: 0; }

.step {
  display: none;
  border: none;
  margin: 0;
  padding: 0;
  animation: stepIn var(--t-norm) var(--ease);
}
.step.is-active { display: block; }

@keyframes stepIn {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}

.eyebrow {
  font-size: 0.74rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--sage-deep);
  margin: 0 0 0.5rem;
  font-weight: 500;
}
.eyebrow.muted { color: var(--muted); }

.step-title {
  font-family: var(--serif);
  font-weight: 400;
  color: var(--ink);
  font-size: 2.1rem;
  line-height: 1.18;
  margin: 0 0 1.25rem;
  letter-spacing: -0.005em;
}

.prose { color: var(--text); margin: 0 0 1.25rem; }
.prose p { margin: 0 0 1rem; }
.prose .muted { color: var(--muted); font-size: 0.9rem; }
.prose em { font-family: var(--serif); font-style: italic; font-size: 1.05em; }

.muted { color: var(--muted); }
.small { font-size: 0.875rem; }

/* ---------- Fields ---------- */

.field { margin: 1.25rem 0; }
.field > label,
.field > legend {
  display: block;
  color: var(--ink);
  font-weight: 500;
  font-size: 1rem;
  margin-bottom: 0.5rem;
  letter-spacing: -0.005em;
}
.field .helper {
  color: var(--muted);
  font-size: 0.875rem;
  margin: 0.45rem 0 0;
  line-height: 1.5;
}
.field .helper code {
  background: var(--sand);
  padding: 0.05rem 0.3rem;
  border-radius: 3px;
  font-size: 0.85em;
}
.field-row { display: grid; gap: 1.5rem; margin: 1.25rem 0; }
.field-row.two-up { grid-template-columns: 1fr 1fr; }
@media (max-width: 560px) {
  .field-row.two-up { grid-template-columns: 1fr; }
}

.optional {
  font-weight: 400;
  color: var(--muted);
  font-style: italic;
  font-size: 0.9em;
  margin-left: 0.25rem;
}

input[type="text"],
input[type="email"],
input[type="tel"],
input[type="number"],
input[type="file"],
select,
textarea {
  width: 100%;
  font: inherit;
  color: var(--ink);
  background: var(--paper);
  border: 1px solid var(--hairline-strong);
  border-radius: var(--radius);
  padding: 0.7rem 0.85rem;
  transition: border-color var(--t-fast) var(--ease),
              box-shadow var(--t-fast) var(--ease),
              background-color var(--t-fast) var(--ease);
}
input::placeholder, textarea::placeholder { color: #9b9588; }
input:focus,
select:focus,
textarea:focus {
  outline: none;
  border-color: var(--sage);
  box-shadow: 0 0 0 3px var(--sage-tint);
  background: #ffffff;
}
/* Only redden a field after the user has interacted with it. :user-invalid
 * fires on blur or submit-attempt, never on initial render — empty required
 * fields don't accuse the user before they've typed a thing. */
input:user-invalid,
select:user-invalid,
textarea:user-invalid {
  border-color: var(--rust);
}

textarea { resize: vertical; min-height: 4em; line-height: 1.5; }

select {
  appearance: none;
  -webkit-appearance: none;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'><path fill='%236b6660' d='M6 8L0 0h12z'/></svg>");
  background-repeat: no-repeat;
  background-position: right 0.85rem center;
  background-size: 10px;
  padding-right: 2.25rem;
}

input[type="file"] {
  padding: 0.5rem;
  font-size: 0.9rem;
  cursor: pointer;
}
input[type="file"]::file-selector-button {
  font: inherit;
  background: var(--sand);
  border: 1px solid var(--hairline-strong);
  color: var(--ink);
  padding: 0.45rem 0.85rem;
  margin-right: 0.85rem;
  border-radius: var(--radius);
  cursor: pointer;
  transition: background-color var(--t-fast) var(--ease);
}
input[type="file"]::file-selector-button:hover { background: var(--sage-tint); }

/* ---------- Choice groups (radio cards) ---------- */

.choice-group {
  border: none;
  margin: 1.25rem 0;
  padding: 0;
}
.choice-group > legend {
  font-weight: 500;
  color: var(--ink);
  margin-bottom: 0.65rem;
  padding: 0;
  display: block;
}
.choice {
  display: flex;
  gap: 0.85rem;
  padding: 0.85rem 1rem;
  border: 1px solid var(--hairline);
  border-radius: var(--radius);
  background: var(--paper);
  cursor: pointer;
  margin: 0.4rem 0;
  transition: border-color var(--t-fast) var(--ease),
              background-color var(--t-fast) var(--ease),
              box-shadow var(--t-fast) var(--ease);
  align-items: flex-start;
  font-weight: 400;
}
.choice:hover {
  border-color: var(--hairline-strong);
  background: #fffefa;
}
.choice input[type="radio"] {
  margin: 0.25rem 0 0;
  accent-color: var(--sage);
  flex-shrink: 0;
}
.choice-body {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
}
.choice-title { color: var(--ink); font-weight: 500; }
.choice-meta { color: var(--muted); font-size: 0.875rem; }
.choice:has(input:checked) {
  border-color: var(--sage);
  background: var(--sage-tint);
  box-shadow: 0 0 0 1px var(--sage);
}

/* Inline pill-style choices for compact multi-option questions */
.inline-group {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  border: none;
  padding: 0;
}
.inline-group > legend {
  display: block;
  color: var(--ink);
  font-weight: 500;
  margin: 0 0 0.4rem;
  padding: 0;
}
.inline-group .chip-row,
.inline-group {
  /* legend wrapper */
}
.inline-group {
  /* place chips after the legend */
}
.chip {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.45rem 0.85rem;
  border: 1px solid var(--hairline-strong);
  border-radius: 999px;
  background: var(--paper);
  cursor: pointer;
  font-size: 0.92rem;
  margin: 0.2rem 0.3rem 0.2rem 0;
  transition: border-color var(--t-fast) var(--ease),
              background-color var(--t-fast) var(--ease),
              color var(--t-fast) var(--ease);
}
.chip:hover { border-color: var(--sage); }
.chip input[type="radio"] {
  appearance: none;
  -webkit-appearance: none;
  width: 0;
  height: 0;
  margin: 0;
  pointer-events: none;
}
.chip:has(input:checked) {
  background: var(--sage);
  border-color: var(--sage);
  color: #fff;
}

/* Wrap chips in inline-group as a flex row */
.inline-group > .chip,
.inline-group .chip {
  display: inline-flex;
}

.inline-group {
  display: block;
}
.inline-group > legend { margin-bottom: 0.5rem; }
.inline-group label.chip { display: inline-flex; }

/* Checkboxes (consent) */
label.check {
  display: flex;
  gap: 0.7rem;
  align-items: flex-start;
  cursor: pointer;
  font-weight: 400;
  color: var(--text);
  padding: 0.7rem 0.85rem;
  border: 1px solid var(--hairline);
  background: var(--paper);
  border-radius: var(--radius);
  transition: border-color var(--t-fast) var(--ease), background-color var(--t-fast) var(--ease);
}
label.check:hover { border-color: var(--hairline-strong); background: #fffefa; }
label.check input[type="checkbox"] {
  margin: 0.25rem 0 0;
  accent-color: var(--sage);
  flex-shrink: 0;
  transform: scale(1.1);
}
label.check:has(input:checked) {
  border-color: var(--sage);
  background: var(--sage-tint);
}

/* Callouts */
.callout {
  background: var(--sand);
  border-left: 3px solid var(--sage);
  padding: 0.95rem 1.1rem;
  margin: 1.5rem 0;
  border-radius: 0 var(--radius) var(--radius) 0;
}
.callout p { margin: 0.4rem 0; }
.callout p:first-child { margin-top: 0; }
.callout p:last-child { margin-bottom: 0; }

/* Conditional / hidden */
.is-hidden { display: none !important; }

/* Honeypot */
.hp-field {
  position: absolute;
  left: -10000px;
  top: auto;
  width: 1px;
  height: 1px;
  overflow: hidden;
}
.visually-hidden {
  position: absolute !important;
  width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0,0,0,0);
  white-space: nowrap; border: 0;
}

/* ---------- Buttons ---------- */

.step-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin: 2rem 0 0.5rem;
  flex-wrap: wrap;
}
.btn {
  font: inherit;
  font-weight: 500;
  letter-spacing: -0.005em;
  border: 1px solid transparent;
  border-radius: var(--radius);
  padding: 0.75rem 1.5rem;
  cursor: pointer;
  transition: background-color var(--t-fast) var(--ease),
              border-color var(--t-fast) var(--ease),
              color var(--t-fast) var(--ease),
              transform var(--t-fast) var(--ease);
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 1rem;
}
.btn:active { transform: translateY(1px); }
.btn:focus-visible { outline: 2px solid var(--sage); outline-offset: 2px; }

.btn-primary {
  background: var(--sage-deep);
  color: #ffffff;
  border-color: var(--sage-deep);
}
.btn-primary:hover { background: var(--ink); border-color: var(--ink); }

.btn-ghost {
  background: transparent;
  color: var(--muted);
}
.btn-ghost:hover { color: var(--ink); }

.btn .arr { transition: transform var(--t-fast) var(--ease); }
.btn-primary:hover .arr { transform: translateX(2px); }

.kbd-hint {
  margin-left: auto;
  color: var(--muted);
  font-size: 0.78rem;
  letter-spacing: 0.05em;
}
kbd {
  font-family: var(--sans);
  font-size: 0.78rem;
  padding: 0.15rem 0.4rem;
  border: 1px solid var(--hairline-strong);
  border-radius: 3px;
  background: var(--paper);
  color: var(--muted);
  margin-right: 0.3rem;
}

/* ---------- Review card (last step) ---------- */

.review-card {
  margin: 2rem 0;
  padding: 1.25rem 1.5rem;
  background: #ffffff;
  border: 1px solid var(--hairline);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
}
.review-card .eyebrow { margin-bottom: 0.85rem; }
.review-list {
  margin: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.6rem;
}
.review-list > div {
  display: grid;
  grid-template-columns: 110px 1fr;
  gap: 1rem;
  font-size: 0.95rem;
}
.review-list dt {
  color: var(--muted);
  font-weight: 500;
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  align-self: center;
}
.review-list dd {
  margin: 0;
  color: var(--ink);
  word-break: break-word;
}

/* ---------- Footer ---------- */

.page-footer {
  border-top: 1px solid var(--hairline);
  padding: 1.5rem 1.25rem 2.5rem;
  text-align: center;
  color: var(--muted);
  font-size: 0.85rem;
}
.page-footer p { margin: 0.25rem 0; }
.page-footer .muted { font-size: 0.85rem; }

/* ---------- Responsive ---------- */

@media (max-width: 560px) {
  html, body { font-size: 16px; }
  .stage { padding: 1.25rem 1rem 3rem; }
  .step-title { font-size: 1.6rem; }
  .masthead-inner { padding: 0.7rem 1rem 0.5rem; flex-direction: column; align-items: flex-start; gap: 0.15rem; }
  .masthead-tag { font-size: 0.7rem; }
  .progress-label { padding: 0.3rem 1rem 0.5rem; }
  .review-list > div { grid-template-columns: 1fr; gap: 0.15rem; }
  .review-list dt { font-size: 0.72rem; }
  .step-actions { flex-direction: row-reverse; justify-content: space-between; }
  .step-actions .btn-prev { order: 2; }
  .step-actions .btn-next, .step-actions .btn-submit { order: 1; flex: 1; justify-content: center; }
  .kbd-hint { display: none; }
}

/* ---------- Reduced motion ---------- */

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}