/* Introductions and settings pages (docs/design/introductions-vision.md), on the tokens and components of user-center.css.
   Motion: transform and opacity only. The one celebration runs once, on the answer that completes a match; stage changes
   do not animate, because they are read, not watched. */

.intro-layout { display: grid; grid-template-columns: minmax(240px, 280px) minmax(0, 1fr) minmax(320px, 360px); grid-template-areas: "list detail why";
  gap: 20px; margin-top: 18px; align-items: start; }
.intro-list-card { grid-area: list; }
.intro-detail { grid-area: detail; min-width: 0; }
.intro-why { grid-area: why; min-width: 0; }

.intro-list { margin: 12px 0 0; padding: 0; list-style: none; display: grid; gap: 4px; }
.intro-item { display: flex; align-items: center; gap: 10px; width: 100%; padding: 10px; border: 1px solid transparent; border-radius: 14px; background: none;
  font: inherit; text-align: left; color: inherit; cursor: pointer;
  transition: transform var(--duration-press) var(--ease-out), background-color var(--duration-small) var(--ease-out); }
.intro-item:active { transform: scale(0.98); }
.intro-item[aria-current="true"] { border-color: var(--track); background: var(--mist); }
.intro-item .pair-mascot { width: 30px; height: 30px; }
.intro-item .pair-art .pair-mascot:last-child { margin-left: -8px; }
.intro-item-text { min-width: 0; display: grid; justify-items: start; gap: 4px; }
.intro-item-meta { display: flex; flex-wrap: wrap; gap: 4px; }
.intro-item .pair-name, .intro-titles .pair-name { font-family: var(--font-display); font-weight: 800; letter-spacing: -0.01em; color: var(--text-strong); }
.intro-item .pair-name { font-size: 0.9375rem; white-space: nowrap; }
.your-turn { padding: 1px 8px; border-radius: 999px; background: var(--action-primary); color: #fff; font-size: 0.6875rem; font-weight: 700; white-space: nowrap; }

.stage { display: inline-flex; padding: 1px 8px; border-radius: 999px; font-size: 0.6875rem; font-weight: 600; white-space: nowrap; background: var(--mist); color: var(--text-muted); }
.stage-requested { background: var(--tint-orange-side); color: var(--label-orange-side); }
.stage-chat { background: var(--blue-50); color: var(--blue-700); }
.stage-matched { background: var(--green-50); color: var(--green-900); }

.intro-head { display: flex; flex-wrap: wrap; align-items: center; gap: 14px; }
.pair-art-lg .pair-mascot { width: 56px; height: 56px; }
.pair-art-lg .pair-mascot:last-child { margin-left: -14px; }
.intro-titles { flex: 1; min-width: 12rem; }
.eyebrow { margin: 0; font-size: 0.6875rem; font-weight: 600; letter-spacing: 0.06em; text-transform: uppercase; color: var(--text-subtle); }
.intro-titles h2 { font-size: 1.5rem; line-height: 1.2; }
.intro-meta { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; margin: 4px 0 0; font-size: 0.875rem; font-weight: 600; color: var(--text-strong);
  font-variant-numeric: tabular-nums; }
.view-as { display: flex; align-items: center; gap: 8px; }

/* Each step draws the connector from the previous one, so a stopped step keeps a grey line into it. */
.stepper { display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); gap: 4px; margin: 18px 0 0; padding: 0; list-style: none; }
.stepper li { position: relative; display: grid; justify-items: center; align-content: start; gap: 6px; font-size: 0.75rem; line-height: 1.3; text-align: center; color: var(--text-subtle); }
.stepper li::before { content: ""; position: absolute; top: 7px; right: calc(50% + 8px); width: calc(100% - 12px); height: 2px; border-radius: 1px; background: var(--track); }
.stepper li:first-child::before { display: none; }
.stepper li.done::before, .stepper li.current:not(.stopped)::before { background: var(--green-600); }
.step-dot { width: 16px; height: 16px; border-radius: 50%; background: var(--surface-card); box-shadow: inset 0 0 0 2px var(--track); }
.stepper .done { color: var(--text); }
.stepper .done .step-dot { background: var(--green-600); box-shadow: none; }
.stepper .current { font-weight: 600; color: var(--text-strong); }
.stepper .current .step-dot { background: var(--navy-900); box-shadow: 0 0 0 4px var(--blue-50); }
.stepper .current.complete .step-dot { background: var(--green-600); box-shadow: 0 0 0 4px var(--green-50); }
.stepper .current.stopped .step-dot { background: var(--surface-card); box-shadow: inset 0 0 0 2px var(--slate-500); }

.intro-panel { margin-top: 18px; padding: 16px; border-radius: 16px; background: var(--mist); }
.intro-panel h3, .approval h3 { margin: 0; font-size: 1rem; font-weight: 700; color: var(--text-strong); }
.intro-panel p { margin: 4px 0 0; font-size: 0.875rem; color: var(--text-muted); }
.intro-panel .actions { margin-top: 12px; }
.refusal { margin: 14px 0 0; padding: 10px 14px; border-radius: 12px; background: var(--tint-low); color: var(--label-low); font-size: 0.8125rem; font-weight: 600; }
.intro-panel .refusal { margin-top: 12px; }

.chat-stage { display: grid; gap: 10px; margin-top: 18px; }
.intro-thread { margin: 0; padding: 12px; list-style: none; display: flex; flex-direction: column; gap: 12px; max-height: 360px; overflow-y: auto;
  overscroll-behavior: contain; border: 1px solid var(--track); border-radius: 16px; }
.intro-thread .empty { margin: 0; align-self: center; }
.imsg { display: flex; align-items: flex-start; gap: 10px; }
.imsg.from-me { flex-direction: row-reverse; }
.imsg .bubble { max-width: 80%; }
.imsg.from-them .bubble { border-top-left-radius: 6px; }
.imsg.from-me .bubble { border-top-right-radius: 6px; background: var(--blue-50); }
.imsg .speaker { margin: 0 0 2px; }
.imsg time { font-variant-numeric: tabular-nums; }
.bubble .imsg-text { margin: 0; white-space: pre-wrap; overflow-wrap: anywhere; color: var(--text-strong); }
.imsg:not(.settled) { transition: opacity var(--duration-entry) var(--ease-out), transform var(--duration-entry) var(--ease-out); }
.intro-compose { margin-top: 0; }

.approval { margin-top: 18px; padding: 16px; border: 1px solid var(--track); border-radius: 16px; }
.answer-buttons { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 12px; }
.their-answer { display: flex; align-items: center; gap: 8px; margin: 12px 0 0; font-size: 0.8125rem; color: var(--text-muted); }
.dot-state { flex: none; width: 8px; height: 8px; border-radius: 50%; box-shadow: inset 0 0 0 1.5px var(--slate-500); }
.dot-state.answered { background: var(--green-600); box-shadow: none; }
.answers { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 8px; margin: 10px 0 0; }
.answer { padding: 10px 12px; border-radius: 12px; background: var(--mist); }
.answer dt { font-size: 0.75rem; color: var(--text-muted); }
.answer dd { margin: 2px 0 0; font-weight: 700; color: var(--text-strong); }
.answer.yes { background: var(--green-50); }
.answer.yes dd { color: var(--green-900); }

.congrats { display: flex; align-items: center; gap: 18px; margin-top: 18px; padding: 16px 18px; border-radius: 18px; background: var(--tint-both); }
.congrats h3 { margin: 0; font-family: var(--font-display); font-weight: 800; font-size: 1.125rem; letter-spacing: -0.01em; color: var(--label-both); }
.congrats p { margin: 4px 0 0; font-size: 0.875rem; color: var(--text); }
.congrats-art { position: relative; flex: none; display: flex; align-items: center; }
.congrats-mascot { width: 52px; height: 52px; }
.congrats-mascot.from-right { margin-left: -12px; }
.congrats-heart { position: absolute; top: -8px; left: calc(50% - 9px); color: var(--red-500); }
.congrats.celebrate { transition: opacity var(--duration-panel) var(--ease-out), transform var(--duration-panel) var(--ease-out); }
.congrats.celebrate .congrats-mascot { transition: transform var(--duration-panel) var(--ease-out); }
.congrats.celebrate .congrats-heart { transition: opacity var(--duration-entry) var(--ease-out) 80ms, transform var(--duration-entry) var(--ease-out) 80ms; }

.activity { margin-top: 18px; font-size: 0.8125rem; }
.activity summary { cursor: pointer; font-weight: 600; color: var(--blue-700); }
.activity ol { margin: 8px 0 0; padding: 0; list-style: none; display: grid; gap: 4px; }
.activity li { display: flex; gap: 10px; color: var(--text-muted); }
.activity time { flex: none; font-variant-numeric: tabular-nums; color: var(--text-subtle); }

.intro-why .cands { margin: 12px 0 4px; }
.why-line { margin: 10px 0 0; font-size: 0.875rem; }
.intro-why .items { font-size: 0.8125rem; }

.settings-layout { display: grid; gap: 20px; margin-top: 18px; }
.settings-card { max-width: 640px; }
.rule-set { margin: 14px 0 0; padding: 0; border: 0; }
.rule-set legend { padding: 0; font-weight: 700; color: var(--text-strong); }
.options { display: grid; gap: 8px; margin-top: 10px; }
.option { display: flex; align-items: flex-start; gap: 12px; padding: 12px 14px; border: 1px solid var(--track); border-radius: 14px; cursor: pointer;
  transition: border-color var(--duration-small) var(--ease-out), background-color var(--duration-small) var(--ease-out); }
.option:has(input:checked) { border-color: var(--selection); background: var(--mist); }
.option:has(input:focus-visible) { outline: 2px solid var(--blue-700); outline-offset: 2px; }
.option input { flex: none; margin: 3px 0 0; accent-color: var(--navy-900); }
.option input:focus-visible { outline: none; }
.option-body { display: grid; gap: 2px; }
.option-label { font-weight: 600; color: var(--text-strong); }
.option-text { font-size: 0.8125rem; color: var(--text-muted); font-variant-numeric: tabular-nums; }
.save-status { min-height: 1.5em; margin: 12px 0 0; font-size: 0.8125rem; font-weight: 600; }
.save-status[data-tone="ok"] { color: var(--green-900); }
.save-status[data-tone="error"] { color: var(--label-low); }

/* The email card (mail-preview-vision.md, section 3; design-system.md, "Segmented choice and switch"). */
.set-help { margin: 6px 0 0; font-size: 0.875rem; color: var(--text); }
.set-line { margin: 8px 0 0; }
.segmented { display: inline-flex; flex-wrap: wrap; gap: 2px; margin-top: 8px; padding: 3px; border-radius: 12px; background: var(--surface-control); }
.segment, .day { position: relative; display: inline-flex; }
.segment input, .day input { position: absolute; inset: 0; margin: 0; opacity: 0; cursor: pointer; }
.segment > span, .day > span[aria-hidden] { padding: 6px 14px; border-radius: 9px; font-size: 0.875rem; font-weight: 600; color: var(--text-muted);
  font-variant-numeric: tabular-nums; pointer-events: none; transition: transform var(--duration-press) var(--ease-out); }
.segment:has(input:checked) > span { background: var(--surface-card); color: var(--text-strong); box-shadow: 0 1px 2px rgb(12 29 82 / 0.14); }
.segment:has(input:focus-visible) > span, .day:has(input:focus-visible) > span[aria-hidden] { outline: 2px solid var(--blue-700); outline-offset: 1px; }
.segment:active > span, .day:active > span[aria-hidden] { transform: scale(0.97); }
.custom-summary { display: flex; flex-wrap: wrap; align-items: center; gap: 10px 16px; margin: 12px 0 0; padding: 12px 14px; border: 1px solid var(--track); border-radius: 14px; }
.custom-summary[hidden] { display: none; }
.days { display: flex; flex-wrap: wrap; gap: 4px; }
.day > span[aria-hidden] { display: inline-block; min-width: 46px; padding: 6px 0; text-align: center; box-shadow: inset 0 0 0 1px var(--track); }
.day:has(input:checked) > span[aria-hidden] { background: var(--navy-900); color: #fff; box-shadow: none; }
.time-field { display: inline-flex; align-items: center; gap: 8px; font-size: 0.875rem; font-weight: 600; color: var(--text-strong); }
.time-field input { height: 36px; padding: 0 10px; border: 1px solid var(--track); border-radius: 10px; background: var(--surface-card); font: inherit; font-weight: 500;
  color: var(--text-strong); font-variant-numeric: tabular-nums; }
.switch-row { display: flex; align-items: flex-start; justify-content: space-between; gap: 16px; margin-top: 10px; padding: 12px 14px; border: 1px solid var(--track);
  border-radius: 14px; cursor: pointer; }
.switch { flex: none; position: relative; width: 40px; height: 24px; margin: 2px 0 0; border-radius: 999px; background: var(--track); appearance: none; cursor: pointer; }
.switch::after { content: ""; position: absolute; top: 3px; left: 3px; width: 18px; height: 18px; border-radius: 50%; background: #fff;
  box-shadow: 0 1px 2px rgb(12 29 82 / 0.25); transition: transform var(--duration-small) var(--ease-out); }
.switch:checked { background: var(--green-600); }
.switch:checked::after { transform: translateX(16px); }
.switch:focus-visible { outline: 2px solid var(--blue-700); outline-offset: 2px; }
.preview-link { margin-top: 4px; }

@starting-style {
  .imsg:not(.settled) { opacity: 0; transform: translateY(6px); }
  .congrats.celebrate { opacity: 0; transform: scale(0.96); }
  .congrats.celebrate .from-left { transform: translateX(-8px); }
  .congrats.celebrate .from-right { transform: translateX(8px); }
  .congrats.celebrate .congrats-heart { opacity: 0; transform: scale(0.9); }
}
@media (hover: hover) and (pointer: fine) {
  .intro-item:not([aria-current="true"]):hover { background: var(--mist); }
  .option:not(:has(input:checked)):hover { border-color: var(--slate-500); }
  .segment:not(:has(input:checked)):hover > span, .day:not(:has(input:checked)):hover > span[aria-hidden] { color: var(--text-strong); }
  .switch-row:hover { border-color: var(--slate-500); }
}
@media (prefers-reduced-motion: reduce) {
  .imsg:not(.settled), .congrats.celebrate, .congrats.celebrate .congrats-heart { transition: opacity var(--duration-small) linear; }
  .congrats.celebrate .congrats-mascot { transition: none; }
  @starting-style {
    .imsg:not(.settled), .congrats.celebrate, .congrats.celebrate .from-left, .congrats.celebrate .from-right, .congrats.celebrate .congrats-heart { transform: none; }
  }
  .intro-item { transition: background-color var(--duration-small) linear; }
  .intro-item:active { transform: none; }
  .switch::after, .segment > span, .day > span[aria-hidden] { transition: none; }
  .segment:active > span, .day:active > span[aria-hidden] { transform: none; }
}
@media (max-width: 1479px) {
  .intro-layout { grid-template-columns: minmax(240px, 280px) minmax(0, 1fr); grid-template-areas: "list detail" "list why"; }
}
@media (max-width: 999px) {
  .intro-layout { grid-template-columns: minmax(0, 1fr); grid-template-areas: "list" "detail" "why"; }
}
@media (max-width: 599px) {
  .stepper li { font-size: 0.6875rem; }
  .answers { grid-template-columns: minmax(0, 1fr); }
  .congrats { flex-direction: column; align-items: flex-start; }
}