:root {
  color-scheme: light;
  --ink: #183438;
  --ink-soft: #557075;
  --teal-900: #123f46;
  --teal-800: #19535a;
  --teal-700: #23646b;
  --teal-200: #b7d9d7;
  --teal-100: #dcecea;
  --teal-050: #eef6f5;
  --blue-050: #f4f8fa;
  --paper: #ffffff;
  --canvas: #edf4f4;
  --line: #d7e4e4;
  --line-strong: #b9cdce;
  --amber: #efb25f;
  --danger: #a94c4c;
  --danger-bg: #fff3f1;
  --success: #2a746a;
  --shadow: 0 24px 60px rgba(27, 66, 71, 0.11);
  --shadow-soft: 0 12px 32px rgba(27, 66, 71, 0.07);
  --radius-lg: 28px;
  --radius-md: 18px;
  --radius-sm: 12px;
  --content: 1160px;
  font-family:
    -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", Arial, sans-serif;
  font-synthesis: none;
}

* {
  box-sizing: border-box;
}

html {
  min-width: 320px;
  background: var(--canvas);
  scroll-behavior: smooth;
}

body {
  min-width: 320px;
  min-height: 100vh;
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at 8% 0%, rgba(183, 217, 215, 0.42), transparent 28rem),
    linear-gradient(180deg, #f8fbfb 0%, var(--canvas) 100%);
  font-size: 1rem;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

button,
input,
textarea {
  font: inherit;
}

button,
input[type="range"],
input[type="checkbox"] {
  accent-color: var(--teal-700);
}

button {
  cursor: pointer;
}

button:disabled {
  cursor: not-allowed;
  opacity: 0.52;
}

a {
  color: var(--teal-700);
}

:focus-visible {
  outline: 3px solid rgba(35, 100, 107, 0.3);
  outline-offset: 3px;
}

.noscript-note {
  padding: 1rem;
  color: #fff;
  text-align: center;
  background: var(--danger);
}

.shell {
  min-height: 100vh;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  border-bottom: 1px solid rgba(185, 205, 206, 0.72);
  background: rgba(248, 251, 251, 0.9);
  backdrop-filter: blur(16px);
}

.site-header__inner {
  display: flex;
  width: min(calc(100% - 2rem), var(--content));
  min-height: 72px;
  margin: 0 auto;
  align-items: center;
  justify-content: space-between;
  gap: 1.25rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  color: var(--teal-900);
  font-weight: 720;
  letter-spacing: 0.02em;
}

.brand__mark {
  position: relative;
  display: inline-block;
  width: 34px;
  height: 34px;
  border-radius: 11px;
  background: var(--teal-900);
}

.brand__mark::before {
  position: absolute;
  top: 16px;
  left: 7px;
  width: 19px;
  height: 7px;
  border-top: 2px solid #d9efec;
  border-radius: 50%;
  content: "";
  transform: rotate(-14deg);
}

.brand__mark::after {
  position: absolute;
  top: 10px;
  right: 7px;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--amber);
  content: "";
}

.participant-pill,
.time-pill,
.step-pill {
  display: inline-flex;
  min-height: 34px;
  padding: 0.28rem 0.75rem;
  align-items: center;
  gap: 0.42rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--ink-soft);
  background: rgba(255, 255, 255, 0.72);
  font-size: 0.875rem;
  white-space: nowrap;
}

.main {
  width: min(calc(100% - 2rem), var(--content));
  margin: 0 auto;
  padding: 2.5rem 0 4rem;
}

.main--home {
  display: grid;
  min-height: calc(100vh - 72px);
  padding: 2rem 0;
  place-items: center;
}

.hero {
  display: grid;
  overflow: hidden;
  width: 100%;
  min-height: min(720px, calc(100vh - 112px));
  border: 1px solid rgba(185, 205, 206, 0.8);
  border-radius: 36px;
  grid-template-columns: minmax(0, 1fr) minmax(380px, 0.78fr);
  background: var(--paper);
  box-shadow: var(--shadow);
}

.hero__visual {
  position: relative;
  min-height: 560px;
  background: var(--teal-100);
}

.hero__visual::after {
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(18, 63, 70, 0.14), transparent 40%);
  content: "";
  pointer-events: none;
}

.hero__image {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero__caption {
  position: absolute;
  right: 2rem;
  bottom: 1.6rem;
  left: 2rem;
  z-index: 1;
  display: flex;
  color: rgba(18, 63, 70, 0.8);
  font-size: 0.82rem;
  justify-content: space-between;
}

.hero__content {
  display: flex;
  padding: clamp(2rem, 5vw, 5rem);
  flex-direction: column;
  justify-content: center;
}

.eyebrow {
  margin: 0 0 0.85rem;
  color: var(--teal-700);
  font-size: 0.82rem;
  font-weight: 750;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  overflow-wrap: anywhere;
}

h1,
h2,
h3 {
  margin: 0;
  color: var(--teal-900);
  line-height: 1.25;
}

h1 {
  max-width: 9em;
  font-size: clamp(2.35rem, 5vw, 4.8rem);
  font-weight: 730;
  letter-spacing: -0.045em;
}

h2 {
  font-size: clamp(1.75rem, 3.4vw, 2.55rem);
  font-weight: 710;
  letter-spacing: -0.025em;
}

h3 {
  font-size: 1.1rem;
  font-weight: 700;
}

.lead {
  max-width: 39rem;
  margin: 1.4rem 0 0;
  color: var(--ink-soft);
  font-size: 1.08rem;
}

.hero__meta {
  display: flex;
  margin: 1.5rem 0 2rem;
  flex-wrap: wrap;
  gap: 0.65rem;
}

.hero__meta span {
  display: inline-flex;
  min-height: 34px;
  padding: 0.28rem 0.75rem;
  align-items: center;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--teal-800);
  background: var(--teal-050);
  font-size: 0.9rem;
}

.form-field {
  display: grid;
  gap: 0.55rem;
}

.form-field + .form-field {
  margin-top: 1.25rem;
}

.form-label {
  color: var(--ink);
  font-size: 0.94rem;
  font-weight: 680;
}

.form-hint {
  margin: 0;
  color: var(--ink-soft);
  font-size: 0.85rem;
}

.text-input,
.text-area {
  width: 100%;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-sm);
  color: var(--ink);
  background: #fff;
  transition: border-color 160ms ease, box-shadow 160ms ease;
}

.text-input {
  min-height: 52px;
  padding: 0 1rem;
}

.text-area {
  min-height: 132px;
  padding: 0.9rem 1rem;
  line-height: 1.65;
  resize: vertical;
}

.text-input:hover,
.text-area:hover {
  border-color: #8caaac;
}

.text-input:focus,
.text-area:focus {
  border-color: var(--teal-700);
  box-shadow: 0 0 0 4px rgba(35, 100, 107, 0.11);
  outline: 0;
}

.button-row {
  display: flex;
  margin-top: 1.5rem;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.button {
  display: inline-flex;
  min-height: 48px;
  padding: 0.72rem 1.2rem;
  border: 1px solid transparent;
  border-radius: 14px;
  align-items: center;
  justify-content: center;
  gap: 0.55rem;
  font-weight: 700;
  transition: transform 140ms ease, background 160ms ease, border-color 160ms ease;
}

.button:hover:not(:disabled) {
  transform: translateY(-1px);
}

.button--primary {
  color: #fff;
  background: var(--teal-800);
  box-shadow: 0 9px 24px rgba(25, 83, 90, 0.18);
}

.button--primary:hover:not(:disabled) {
  background: var(--teal-900);
}

.button--secondary {
  border-color: var(--line-strong);
  color: var(--teal-900);
  background: var(--paper);
}

.button--ghost {
  color: var(--teal-800);
  background: transparent;
}

.button--danger {
  border-color: #ebcaca;
  color: var(--danger);
  background: var(--danger-bg);
}

.button--wide {
  width: 100%;
}

.tiny-note {
  margin: 1rem 0 0;
  color: var(--ink-soft);
  font-size: 0.8rem;
}

.progress-wrap {
  width: min(calc(100% - 2rem), var(--content));
  margin: 0 auto;
  padding: 0.8rem 0 0;
}

.progress-track {
  overflow: hidden;
  height: 4px;
  border-radius: 999px;
  background: #dce7e7;
}

.progress-fill {
  width: var(--progress, 0%);
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--teal-700), #6faaa7);
  transition: width 240ms ease;
}

.progress-labels {
  display: flex;
  margin-top: 0.5rem;
  color: var(--ink-soft);
  font-size: 0.76rem;
  justify-content: space-between;
}

.page-grid {
  display: grid;
  align-items: start;
  grid-template-columns: minmax(0, 1fr) 280px;
  gap: 2rem;
}

.page-grid--wide {
  grid-template-columns: minmax(0, 1fr) 340px;
}

.page-title {
  margin-bottom: 1.5rem;
}

.page-title .lead {
  margin-top: 0.75rem;
  font-size: 1rem;
}

.card {
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, 0.93);
  box-shadow: var(--shadow-soft);
}

.card__body {
  padding: clamp(1.4rem, 3vw, 2.4rem);
}

.card + .card {
  margin-top: 1rem;
}

.side-note {
  position: sticky;
  top: 110px;
  padding: 1.4rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  color: var(--ink-soft);
  background: rgba(238, 246, 245, 0.84);
}

.side-note h3 {
  margin-bottom: 0.65rem;
  font-size: 1rem;
}

.side-note p {
  margin: 0;
  font-size: 0.9rem;
}

.side-note p + p {
  margin-top: 0.75rem;
}

.consent-document {
  max-height: min(62vh, 720px);
  overflow: auto;
  padding-right: 0.75rem;
  scroll-behavior: smooth;
}

.consent-document h3 {
  margin: 1.8rem 0 0.7rem;
}

.consent-document h3:first-child {
  margin-top: 0;
}

.consent-document p,
.consent-document li {
  color: #38565a;
}

.consent-document p {
  margin: 0.6rem 0;
}

.consent-document ul,
.consent-document ol {
  margin: 0.7rem 0;
  padding-left: 1.4rem;
}

.consent-confirm {
  margin-top: 1.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--line);
}

.choice {
  display: grid;
  min-height: 52px;
  padding: 0.8rem 1rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  align-items: start;
  grid-template-columns: auto 1fr;
  gap: 0.75rem;
  background: var(--paper);
}

.choice + .choice {
  margin-top: 0.65rem;
}

.choice input {
  width: 20px;
  height: 20px;
  margin-top: 0.12rem;
}

.choice strong {
  display: block;
  font-size: 0.95rem;
}

.choice span {
  display: block;
  color: var(--ink-soft);
  font-size: 0.84rem;
}

.section-stack {
  display: grid;
  gap: 1rem;
}

.question-card {
  padding: 1.35rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: var(--paper);
}

.question-card__head {
  display: flex;
  margin-bottom: 0.9rem;
  align-items: flex-start;
  gap: 0.75rem;
}

.question-number {
  display: inline-flex;
  width: 30px;
  height: 30px;
  flex: 0 0 auto;
  border-radius: 10px;
  align-items: center;
  justify-content: center;
  color: var(--teal-800);
  background: var(--teal-050);
  font-size: 0.82rem;
  font-weight: 760;
}

.range-field {
  display: grid;
  gap: 0.55rem;
}

.range-field__top {
  display: flex;
  min-height: 24px;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.range-value {
  min-width: 3.2rem;
  color: var(--teal-800);
  font-variant-numeric: tabular-nums;
  font-weight: 760;
  text-align: right;
}

.range-value[data-empty="true"] {
  color: var(--ink-soft);
  font-weight: 500;
}

.range-input {
  width: 100%;
  height: 28px;
  margin: 0;
  background: transparent;
}

.range-labels {
  display: flex;
  color: var(--ink-soft);
  font-size: 0.8rem;
  justify-content: space-between;
  gap: 1rem;
}

.error-note,
.status-note {
  display: none;
  margin: 1rem 0 0;
  padding: 0.8rem 0.95rem;
  border-radius: 12px;
  font-size: 0.9rem;
}

.error-note.is-visible {
  display: block;
  border: 1px solid #ebcaca;
  color: var(--danger);
  background: var(--danger-bg);
}

.status-note.is-visible {
  display: block;
  border: 1px solid var(--line);
  color: var(--teal-800);
  background: var(--teal-050);
}

.loading-screen {
  display: grid;
  min-height: 55vh;
  place-items: center;
  text-align: center;
}

.loading-orbit {
  position: relative;
  width: 72px;
  height: 72px;
  margin: 0 auto 1.5rem;
  border: 1px solid var(--teal-200);
  border-radius: 50%;
}

.loading-orbit::after {
  position: absolute;
  top: -4px;
  left: 31px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--amber);
  content: "";
  transform-origin: 5px 40px;
  animation: orbit 1.8s linear infinite;
}

@keyframes orbit {
  to {
    transform: rotate(360deg);
  }
}

.workspace {
  display: grid;
  min-height: calc(100vh - 140px);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: var(--paper);
  box-shadow: var(--shadow);
  grid-template-rows: auto minmax(0, 1fr) auto;
}

.workspace__header {
  display: flex;
  min-height: 82px;
  padding: 1rem 1.25rem;
  border-bottom: 1px solid var(--line);
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.workspace__title p,
.workspace__title h2 {
  margin: 0;
}

.workspace__title h2 {
  font-size: 1.25rem;
}

.workspace__title p {
  color: var(--ink-soft);
  font-size: 0.82rem;
}

.workspace__actions {
  display: flex;
  align-items: center;
  gap: 0.55rem;
}

.workspace__body {
  min-height: 0;
  overflow: auto;
}

.chat-body {
  display: flex;
  padding: clamp(1rem, 3vw, 2rem);
  flex-direction: column;
}

.message-list {
  display: grid;
  margin-top: auto;
  gap: 1rem;
}

.message {
  display: flex;
  max-width: 76%;
  flex-direction: column;
  gap: 0.35rem;
}

.message--user {
  margin-left: auto;
  align-items: flex-end;
}

.message--assistant {
  margin-right: auto;
  align-items: flex-start;
}

.message__bubble {
  padding: 0.9rem 1rem;
  border-radius: 18px;
  white-space: pre-wrap;
}

.message--user .message__bubble {
  border-bottom-right-radius: 5px;
  color: #fff;
  background: var(--teal-700);
}

.message--assistant .message__bubble {
  border: 1px solid var(--line);
  border-bottom-left-radius: 5px;
  color: var(--ink);
  background: var(--blue-050);
}

.message__meta {
  color: var(--ink-soft);
  font-size: 0.72rem;
}

.thinking {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
}

.thinking span {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--teal-700);
  animation: bounce 1.2s ease-in-out infinite;
}

.thinking span:nth-child(2) {
  animation-delay: 120ms;
}

.thinking span:nth-child(3) {
  animation-delay: 240ms;
}

@keyframes bounce {
  0%,
  70%,
  100% {
    opacity: 0.4;
    transform: translateY(0);
  }
  35% {
    opacity: 1;
    transform: translateY(-4px);
  }
}

.chat-composer {
  padding: 1rem;
  border-top: 1px solid var(--line);
  background: #fbfdfd;
}

.composer-box {
  display: grid;
  padding: 0.55rem;
  border: 1px solid var(--line-strong);
  border-radius: 18px;
  align-items: end;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 0.5rem;
  background: #fff;
}

.composer-box textarea {
  width: 100%;
  min-height: 48px;
  max-height: 130px;
  padding: 0.65rem 0.75rem;
  border: 0;
  color: var(--ink);
  background: transparent;
  line-height: 1.5;
  resize: none;
  outline: 0;
}

.send-button {
  display: grid;
  width: 44px;
  height: 44px;
  border: 0;
  border-radius: 14px;
  color: #fff;
  place-items: center;
  background: var(--teal-800);
}

.send-button svg {
  width: 19px;
  height: 19px;
}

.composer-hint {
  margin: 0.45rem 0 0;
  color: var(--ink-soft);
  font-size: 0.76rem;
  text-align: center;
}

.writing-body {
  padding: clamp(1rem, 3vw, 2rem);
  background: #fbfdfd;
}

.writing-intro {
  max-width: 720px;
  margin: 0 auto 1.5rem;
  color: var(--ink-soft);
}

.writing-grid {
  display: grid;
  max-width: 820px;
  margin: 0 auto;
  gap: 1rem;
}

.writing-card {
  padding: 1.2rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: #fff;
}

.writing-card h3 {
  margin-bottom: 0.35rem;
}

.writing-card p {
  margin: 0 0 0.8rem;
  color: var(--ink-soft);
  font-size: 0.9rem;
}

.writing-card .text-area {
  min-height: 150px;
}

.save-state {
  min-height: 1.3em;
  margin-top: 0.4rem;
  color: var(--success);
  font-size: 0.76rem;
  text-align: right;
}

.workspace__footer {
  display: flex;
  padding: 1rem 1.25rem;
  border-top: 1px solid var(--line);
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  background: #fbfdfd;
}

.scale-block {
  display: grid;
  gap: 0.8rem;
}

.likert-row {
  display: grid;
  padding: 1.1rem 0;
  border-bottom: 1px solid var(--line);
  grid-template-columns: minmax(0, 1fr) 340px;
  gap: 1.2rem;
}

.likert-row:last-child {
  border-bottom: 0;
}

.likert-row__text {
  margin: 0;
  color: #29494d;
}

.likert-options {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 0.3rem;
}

.likert-option {
  display: grid;
  min-width: 32px;
  min-height: 40px;
  border: 1px solid var(--line);
  border-radius: 10px;
  color: var(--ink-soft);
  place-items: center;
  background: var(--paper);
  cursor: pointer;
}

.likert-option:has(input:checked) {
  border-color: var(--teal-700);
  color: #fff;
  background: var(--teal-700);
}

.likert-option input {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  white-space: nowrap;
}

.likert-labels {
  display: flex;
  margin-top: 0.25rem;
  color: var(--ink-soft);
  font-size: 0.76rem;
  justify-content: space-between;
}

.completion {
  display: grid;
  min-height: calc(100vh - 160px);
  place-items: center;
}

.completion-card {
  max-width: 720px;
  padding: clamp(2rem, 6vw, 4.5rem);
  border: 1px solid var(--line);
  border-radius: 34px;
  text-align: center;
  background: var(--paper);
  box-shadow: var(--shadow);
}

.completion-mark {
  position: relative;
  width: 84px;
  height: 84px;
  margin: 0 auto 1.5rem;
  border: 1px solid var(--teal-200);
  border-radius: 50%;
  background: var(--teal-050);
}

.completion-mark::before {
  position: absolute;
  top: 38px;
  left: 20px;
  width: 42px;
  height: 14px;
  border-top: 3px solid var(--teal-700);
  border-radius: 50%;
  content: "";
  transform: rotate(-10deg);
}

.completion-mark::after {
  position: absolute;
  top: 18px;
  right: 18px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--amber);
  content: "";
}

.completion-card p {
  color: var(--ink-soft);
}

.completion-card__divider {
  width: 68px;
  height: 1px;
  margin: 2rem auto;
  background: var(--line-strong);
}

.dialog {
  width: min(calc(100% - 2rem), 480px);
  padding: 0;
  border: 1px solid var(--line);
  border-radius: 24px;
  color: var(--ink);
  background: var(--paper);
  box-shadow: var(--shadow);
}

.dialog::backdrop {
  background: rgba(12, 38, 42, 0.52);
  backdrop-filter: blur(4px);
}

.dialog__body {
  padding: 1.7rem;
}

.dialog__body h2 {
  font-size: 1.5rem;
}

.dialog__body p:not(.eyebrow) {
  color: var(--ink-soft);
}

.dialog__actions {
  display: flex;
  margin-top: 1.5rem;
  justify-content: flex-end;
  gap: 0.6rem;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

@media (max-width: 900px) {
  .hero {
    min-height: 0;
    grid-template-columns: 1fr;
  }

  .hero__visual {
    min-height: 330px;
    order: 2;
  }

  .hero__content {
    padding: 2.25rem;
  }

  .page-grid,
  .page-grid--wide {
    grid-template-columns: 1fr;
  }

  .side-note {
    position: static;
  }

  .likert-row {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .site-header__inner,
  .progress-wrap,
  .main {
    width: min(calc(100% - 1.2rem), var(--content));
  }

  .site-header__inner {
    min-height: 62px;
  }

  .brand__text {
    display: none;
  }

  .main {
    padding: 1.4rem 0 2.5rem;
  }

  .main--home {
    padding: 0.6rem 0;
  }

  .hero {
    border-radius: 24px;
  }

  .hero__content {
    padding: 1.5rem;
  }

  .hero__visual {
    min-height: 250px;
  }

  .hero__caption {
    right: 1rem;
    bottom: 0.9rem;
    left: 1rem;
  }

  .hero__caption span:last-child {
    display: none;
  }

  .progress-labels span:not(.is-current) {
    display: none;
  }

  .progress-labels {
    justify-content: flex-start;
  }

  .card,
  .workspace,
  .completion-card {
    border-radius: 22px;
  }

  .card__body {
    padding: 1.15rem;
  }

  .question-card {
    padding: 1rem;
  }

  .workspace {
    min-height: calc(100vh - 112px);
  }

  .workspace__header {
    align-items: flex-start;
  }

  .workspace__actions {
    flex-direction: column;
    align-items: flex-end;
  }

  .workspace__actions .button {
    min-height: 38px;
    padding: 0.4rem 0.7rem;
    font-size: 0.82rem;
  }

  .workspace__footer {
    align-items: stretch;
    flex-direction: column-reverse;
  }

  .workspace__footer .button {
    width: 100%;
  }

  .message {
    max-width: 90%;
  }

  .likert-options {
    gap: 0.18rem;
  }

  .likert-option {
    min-width: 0;
  }

  .dialog__actions {
    align-items: stretch;
    flex-direction: column;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* 文字任务固定在可视区域内，仅中间的聊天或书写内容滚动。 */
html.task-screen,
body.task-screen {
  height: 100dvh;
  overflow: hidden;
}
.task-screen #app,
.task-screen .shell {
  height: 100%;
  min-height: 0;
}
.task-screen .shell {
  display: flex;
  flex-direction: column;
}
.task-screen .site-header,
.task-screen .progress-wrap {
  flex-shrink: 0;
}
.task-screen .main {
  display: flex;
  flex: 1;
  min-height: 0;
  padding: 0.8rem 0;
}
.task-screen .workspace {
  width: 100%;
  min-height: 0;
  overflow: hidden;
  grid-template-rows: auto auto minmax(0, 1fr) auto;
}
.task-notice {
  display: flex;
  padding: 0.55rem 1.25rem;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  border-bottom: 1px solid var(--line);
  color: var(--ink-soft);
  background: var(--teal-050);
  font-size: 0.8rem;
}
.task-notice .button {
  flex-shrink: 0;
}
.chat-body,
.writing-body {
  position: relative;
  overscroll-behavior: contain;
  overflow-y: auto;
}
.message-list {
  flex-shrink: 0;
  padding-bottom: 0.2rem;
}
.message__bubble {
  overflow-wrap: anywhere;
}
.chat-controls {
  display: flex;
  margin-top: 0.35rem;
  justify-content: space-between;
  gap: 0.5rem;
}
.chat-controls .button {
  min-height: 34px;
  padding: 0.3rem 0.7rem;
  font-size: 0.8rem;
}
.chat-controls #finish-chat {
  margin-left: auto;
}
.message--incomplete .message__bubble {
  opacity: 0.7;
}
[hidden] {
  display: none !important;
}

.task-notice[data-phase="closing"],
.task-notice[data-phase="last-seconds"] {
  background: #fff7e9;
  border-left: 4px solid #ba8b45;
  color: #6b502d;
}
.task-notice[data-phase="last-seconds"] { background: #fff1dc; }
.task-notice[data-phase="ended"] { border-left: 4px solid #28666d; }
.confirm-choice { display: flex; gap: .65rem; align-items: flex-start; margin: 1.3rem 0; }
.confirm-choice input { flex: 0 0 auto; margin-top: .35rem; }
@media (max-width: 640px), (max-height: 650px) {
  .task-screen .site-header__inner {
    min-height: 46px;
  }
  .task-screen .progress-wrap {
    padding-top: 0.35rem;
  }
  .task-screen .progress-labels {
    margin-top: 0.2rem;
  }
  .task-screen .main {
    padding: 0.4rem 0;
  }
  .task-screen .workspace__header {
    min-height: 60px;
    padding: 0.55rem 0.8rem;
    align-items: center;
  }
  .task-screen .workspace__actions {
    flex-direction: row;
    align-items: center;
  }
  .task-notice {
    padding: 0.4rem 0.8rem;
    font-size: 0.75rem;
  }
  .chat-composer {
    padding: 0.6rem;
  }
  .composer-box textarea {
    min-height: 40px;
    max-height: 100px;
  }
  .chat-composer .error-note {
    padding: 0.5rem;
    margin: 0.4rem 0 0;
  }
}