:root {
  --bg: #f6f4ef;
  --bg-soft: #fbfaf7;
  --panel: rgba(255, 255, 255, 0.92);
  --ink: #111111;
  --muted: #6f6a63;
  --line: rgba(17, 17, 17, 0.08);
  --line-strong: rgba(17, 17, 17, 0.16);
  --shadow-lg: 0 30px 80px rgba(22, 22, 22, 0.08);
  --shadow-md: 0 18px 44px rgba(22, 22, 22, 0.06);
  --shadow-sm: 0 8px 24px rgba(22, 22, 22, 0.05);
  --success: #1d7b56;
  --success-bg: #eaf7f0;
  --warning: #9c6a07;
  --warning-bg: #fff4d8;
  --danger: #a33e3e;
  --danger-bg: #fff0f0;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
  color: var(--ink);
  background:
    radial-gradient(circle at top left, rgba(145, 185, 255, 0.08), transparent 22%),
    radial-gradient(circle at bottom right, rgba(0, 0, 0, 0.03), transparent 18%),
    linear-gradient(180deg, #fbfaf8 0%, #f5f3ee 100%);
  font-family: "SF Pro Display", "Helvetica Neue", "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(17, 17, 17, 0.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(17, 17, 17, 0.02) 1px, transparent 1px);
  background-size: 34px 34px;
  mask-image: radial-gradient(circle at center, black, transparent 82%);
}

a,
button,
input,
select,
textarea {
  font: inherit;
}

.page-shell {
  width: min(1440px, calc(100% - 40px));
  margin: 0 auto;
  padding: 20px 0 34px;
}

.topbar {
  display: flex;
  align-items: center;
  gap: 18px;
  padding: 4px 0 18px;
  margin-bottom: 24px;
}

.topbar-announcement {
  flex: 1 1 520px;
  min-width: 240px;
  max-width: 880px;
  display: flex;
  align-items: center;
  gap: 12px;
  min-height: 60px;
  padding: 0 6px;
  border: 1px solid transparent;
  border-radius: 18px;
  background: transparent;
  box-shadow: none;
  overflow: hidden;
}

.topbar-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  margin-left: auto;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  color: inherit;
  text-decoration: none;
}

.brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 46px;
  height: 46px;
  border-radius: 15px;
  background: linear-gradient(145deg, #111111, #2f2f2f);
  color: #ffffff;
  font-size: 21px;
  font-weight: 800;
  box-shadow: var(--shadow-sm);
}

.brand-copy {
  display: grid;
  gap: 2px;
}

.brand-copy strong {
  font-size: 23px;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.brand-copy span {
  color: var(--muted);
  font-size: 13px;
}

.ghost-link,
.primary-link.subtle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  padding: 0 18px;
  border-radius: 16px;
  border: 1px solid var(--line-strong);
  text-decoration: none;
  transition: transform 160ms ease, box-shadow 160ms ease, background 160ms ease;
}

.ghost-link {
  background: rgba(255, 255, 255, 0.78);
  color: var(--ink);
}

.primary-link.subtle {
  background: #111111;
  color: #ffffff;
  border-color: #111111;
}

.ghost-link:hover,
.primary-link.subtle:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow-sm);
}

body.drawer-open {
  overflow: hidden;
}

.product-main {
  display: grid;
  gap: 38px;
}

.announcement-viewport {
  flex: 1 1 auto;
  min-width: 0;
  position: relative;
  height: 40px;
  overflow: hidden;
  mask-image: linear-gradient(90deg, transparent, black 5%, black 95%, transparent);
}

.announcement-track {
  position: absolute;
  left: 0;
  top: 50%;
  display: inline-flex;
  align-items: center;
  width: max-content;
  will-change: transform;
  transform: translateX(var(--announcement-start, 100%)) translateY(-50%);
  animation: announcement-marquee var(--announcement-duration, 36s) linear infinite;
}

.topbar-announcement:hover .announcement-track {
  animation-play-state: paused;
}

.announcement-group {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  white-space: nowrap;
}

.announcement-chip {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 28px;
  padding: 0 12px;
  border-radius: 999px;
  background: rgba(17, 17, 17, 0.06);
  color: var(--ink);
  font-size: 12px;
  font-weight: 700;
}

.announcement-title {
  font-size: 14px;
  font-weight: 700;
  color: var(--ink);
}

.announcement-text {
  color: var(--muted);
  font-size: 14px;
}

.announcement-cta {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 36px;
  padding: 0 14px;
  border-radius: 999px;
  border: 1px solid currentColor;
  text-decoration: none;
  white-space: nowrap;
}

@keyframes announcement-marquee {
  from {
    transform: translateX(var(--announcement-start, 100%)) translateY(-50%);
  }
  to {
    transform: translateX(var(--announcement-end, -100%)) translateY(-50%);
  }
}

@media (prefers-reduced-motion: reduce) {
  .announcement-track {
    animation: none;
  }

  .help-card.is-active {
    animation: none;
  }

  .help-center-dot {
    transition: none;
  }
}

.announcement-info {
  background: transparent;
}

.announcement-info .announcement-chip {
  background: rgba(51, 95, 163, 0.12);
  color: #335fa3;
}

.announcement-info .announcement-cta {
  color: #335fa3;
}

.announcement-success {
  background: transparent;
}

.announcement-success .announcement-chip {
  background: rgba(29, 123, 86, 0.12);
  color: var(--success);
}

.announcement-success .announcement-cta {
  color: var(--success);
}

.announcement-warning {
  background: transparent;
}

.announcement-warning .announcement-chip {
  background: rgba(156, 106, 7, 0.12);
  color: var(--warning);
}

.announcement-warning .announcement-cta {
  color: var(--warning);
}

.announcement-danger {
  background: transparent;
}

.announcement-danger .announcement-chip {
  background: rgba(163, 62, 62, 0.12);
  color: var(--danger);
}

.announcement-danger .announcement-cta {
  color: var(--danger);
}

.hero-shell {
  display: grid;
  justify-items: center;
  gap: 20px;
  padding-top: 4px;
}

.hero-copy {
  display: grid;
  justify-items: center;
  gap: 8px;
  text-align: center;
  max-width: 980px;
}

.hero-copy h1 {
  margin: 0;
  max-width: none;
  font-size: clamp(28px, 3.4vw, 44px);
  line-height: 1.08;
  letter-spacing: -0.045em;
  font-weight: 700;
  white-space: nowrap;
}

.hero-copy p {
  margin: 0;
  max-width: none;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.5;
}

.composer-form {
  width: min(960px, 100%);
  margin: 0 auto;
  display: grid;
  gap: 14px;
}

.workflow-switcher {
  display: grid;
  gap: 0;
  justify-items: center;
}

.composer-panel {
  display: grid;
  gap: 16px;
  padding: 26px 26px 18px;
  border: 1px solid rgba(17, 17, 17, 0.08);
  border-radius: 40px;
  background: var(--panel);
  box-shadow: var(--shadow-lg);
}

.image-preview {
  display: grid;
  grid-template-columns: 148px minmax(0, 1fr) auto;
  gap: 14px;
  align-items: center;
  padding: 14px;
  border-radius: 22px;
  border: 1px solid rgba(17, 17, 17, 0.08);
  background: rgba(248, 246, 242, 0.92);
}

.image-preview img {
  width: 148px;
  height: 102px;
  object-fit: cover;
  border-radius: 16px;
  display: block;
}

.image-meta {
  display: grid;
  gap: 6px;
}

.image-meta strong {
  font-size: 14px;
  font-weight: 700;
}

.image-meta span {
  color: var(--muted);
  font-size: 13px;
  line-height: 1.6;
}

.remove-image-btn {
  min-height: 38px;
  padding: 0 14px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: #ffffff;
  color: var(--ink);
  cursor: pointer;
}

.composer-textarea {
  width: 100%;
  min-height: 190px;
  resize: vertical;
  padding: 0 6px;
  border: 0;
  background: transparent;
  color: var(--ink);
  font-size: 28px;
  line-height: 1.42;
  letter-spacing: -0.02em;
}

.composer-textarea::placeholder {
  color: #b6b0a8;
  font-size: 18px;
  line-height: 1.65;
  letter-spacing: -0.01em;
}

.composer-textarea:focus {
  outline: none;
}

.composer-footer {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
}

.upload-chip {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  padding: 0 16px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: #ffffff;
  color: var(--ink);
  cursor: pointer;
  transition: box-shadow 160ms ease, transform 160ms ease;
}

.upload-chip:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow-sm);
}

.upload-chip span {
  font-size: 14px;
  font-weight: 600;
}

.workflow-tabs,
.mode-pills {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.workflow-tabs {
  flex: 1 1 420px;
}

.workflow-tabs.prominent {
  width: min(760px, 100%);
  flex: 0 1 auto;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  justify-content: center;
}

.workflow-missing {
  display: grid;
  gap: 6px;
  width: min(760px, 100%);
  padding: 14px 16px;
  border: 1px solid rgba(163, 62, 62, 0.14);
  border-radius: 18px;
  background: var(--danger-bg);
  color: var(--danger);
  text-align: left;
}

.workflow-missing strong {
  font-size: 14px;
}

.workflow-missing span {
  font-size: 13px;
  line-height: 1.6;
}

.workflow-missing a {
  color: inherit;
  font-weight: 700;
}

.workflow-missing code {
  font-family: "Cascadia Code", "Consolas", monospace;
}

.toggle-option {
  position: relative;
}

.toggle-option input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.toggle-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 42px;
  padding: 0 16px;
  border-radius: 999px;
  border: 1px solid rgba(17, 17, 17, 0.1);
  background: #ffffff;
  color: var(--ink);
  cursor: pointer;
  transition: background 160ms ease, color 160ms ease, border-color 160ms ease, transform 160ms ease;
}

.toggle-pill strong {
  font-size: 14px;
  font-weight: 700;
}

.toggle-pill span {
  color: var(--muted);
  font-size: 12px;
}

.workflow-tabs.prominent .toggle-pill {
  min-height: 76px;
  width: 100%;
  justify-content: flex-start;
  padding: 14px 18px;
  border-radius: 22px;
  box-shadow: var(--shadow-sm);
}

.workflow-tabs.prominent .toggle-pill strong {
  display: block;
  font-size: 16px;
}

.workflow-select-pill {
  display: grid;
  align-content: center;
  justify-items: start;
  gap: 4px;
}

.workflow-select-pill span {
  font-size: 13px;
}

.toggle-option input:checked + .toggle-pill {
  background: #111111;
  border-color: #111111;
  color: #ffffff;
}

.toggle-option input:checked + .toggle-pill span {
  color: rgba(255, 255, 255, 0.72);
}

.toggle-pill:hover {
  transform: translateY(-1px);
}

.mode-pill {
  min-height: 38px;
  padding: 0 14px;
}

.mode-pill strong {
  font-size: 13px;
}

.lesson-mode-hint {
  margin: 2px 0 0;
  padding: 0 2px;
  border: 0;
  background: transparent;
  color: rgba(17, 17, 17, 0.52);
  font-size: 11px;
  line-height: 1.5;
}

.engine-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 12px;
}

.engine-option {
  width: 100%;
}

.engine-option.disabled {
  cursor: not-allowed;
}

.engine-card {
  display: grid;
  gap: 12px;
  width: 100%;
  min-height: 114px;
  padding: 16px 16px 14px;
  border-radius: 22px;
  border: 1px solid rgba(17, 17, 17, 0.08);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.96), rgba(248, 246, 241, 0.98));
  box-shadow: var(--shadow-sm);
}

.engine-card-tags {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  justify-content: flex-end;
  flex-wrap: wrap;
}

.engine-card-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
}

.engine-card-head strong {
  font-size: 15px;
  line-height: 1.3;
}

.engine-status-chip {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 28px;
  padding: 0 10px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 700;
  white-space: nowrap;
}

.engine-status-chip.ready {
  background: rgba(24, 123, 78, 0.12);
  color: #187b4e;
}

.engine-status-chip.pending {
  background: rgba(171, 110, 7, 0.14);
  color: #8a5b07;
}

.engine-points {
  padding: 5px 10px;
  border-radius: 999px;
  background: rgba(17, 17, 17, 0.06);
  color: var(--ink);
  font-size: 12px;
  font-weight: 700;
  white-space: nowrap;
}

.engine-description {
  color: var(--muted);
  font-size: 13px;
  line-height: 1.6;
}

.engine-note {
  color: #8f6731;
  font-size: 12px;
  line-height: 1.5;
}

.toggle-option input:checked + .engine-card {
  background: linear-gradient(180deg, #111111, #1f1f1f);
  border-color: #111111;
  color: #ffffff;
}

.engine-card.disabled {
  opacity: 0.72;
  background: linear-gradient(180deg, rgba(255, 252, 246, 0.96), rgba(245, 239, 229, 0.98));
  border-style: dashed;
}

.toggle-option input:disabled + .engine-card {
  cursor: not-allowed;
}

.toggle-option input:checked + .engine-card .engine-points {
  background: rgba(255, 255, 255, 0.14);
  color: rgba(255, 255, 255, 0.9);
}

.toggle-option input:checked + .engine-card .engine-status-chip.ready {
  background: rgba(255, 255, 255, 0.16);
  color: rgba(255, 255, 255, 0.92);
}

.toggle-option input:checked + .engine-card .engine-description {
  color: rgba(255, 255, 255, 0.76);
}

.toggle-option input:checked + .engine-card .engine-note {
  color: rgba(255, 255, 255, 0.7);
}

.workflow-hint,
.submit-hint,
.field-hint,
.progress-desc,
.recent-job-meta,
.log-snippet,
.mini-label {
  color: var(--muted);
  font-size: 13px;
  line-height: 1.65;
}

.workflow-hint {
  padding: 0 4px;
  text-align: center;
}

.workflow-config {
  display: grid;
}

.config-shell {
  display: grid;
  gap: 18px;
  padding: 18px 20px;
  border: 1px solid rgba(17, 17, 17, 0.08);
  border-radius: 24px;
  background: rgba(255, 255, 255, 0.74);
  box-shadow: var(--shadow-sm);
}

.field {
  display: grid;
  gap: 10px;
}

.engine-field {
  margin-top: 4px;
}

.field-label,
.meta-label {
  font-size: 13px;
  font-weight: 700;
  color: #232323;
}

.meta-row,
.config-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.meta-field {
  display: grid;
  gap: 8px;
}

.interactive-shell-hint {
  margin: 2px 4px 0;
}

.teacher-notes-field {
  display: grid;
  gap: 8px;
}

.teacher-notes-textarea {
  min-height: 88px;
  padding: 14px 16px;
  border: 1px solid rgba(17, 17, 17, 0.1);
  border-radius: 16px;
  background: #ffffff;
  color: var(--ink);
  font-size: 15px;
  line-height: 1.6;
  resize: vertical;
}

.teacher-notes-textarea:focus {
  outline: none;
  border-color: rgba(17, 17, 17, 0.24);
  box-shadow: 0 0 0 4px rgba(17, 17, 17, 0.05);
}

select,
.history-search-input,
.static-value {
  width: 100%;
  min-height: 48px;
  padding: 12px 14px;
  border: 1px solid rgba(17, 17, 17, 0.1);
  border-radius: 16px;
  background: #ffffff;
  color: var(--ink);
}

.static-value {
  display: flex;
  align-items: center;
  color: var(--muted);
}

.history-search-input {
  font: inherit;
}

.submit-fab {
  margin-left: auto;
  min-height: 52px;
  padding: 0 22px;
  border: 0;
  border-radius: 999px;
  background: #111111;
  color: #ffffff;
  font-size: 15px;
  font-weight: 700;
  cursor: pointer;
  box-shadow: var(--shadow-sm);
  transition: transform 160ms ease, opacity 160ms ease;
}

.submit-fab:hover {
  transform: translateY(-1px);
}

.submit-fab:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.submit-hint {
  margin: 0;
  text-align: center;
}

.task-board {
  display: grid;
  grid-template-columns: minmax(0, 1.04fr) minmax(360px, 0.96fr);
  gap: 18px;
  align-items: start;
}

.status-card,
.history-card {
  border: 1px solid rgba(17, 17, 17, 0.08);
  border-radius: 30px;
  background: rgba(255, 255, 255, 0.9);
  box-shadow: var(--shadow-md);
  padding: 24px;
}

.panel-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 16px;
}

.panel-actions {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 10px;
  flex-wrap: wrap;
}

.panel-tag {
  color: var(--muted);
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-weight: 700;
}

.panel-head h2 {
  margin: 10px 0 0;
  font-size: 28px;
  line-height: 1.06;
  letter-spacing: -0.04em;
}

.empty-state {
  display: grid;
  gap: 8px;
  padding: 20px;
  border: 1px dashed rgba(17, 17, 17, 0.12);
  border-radius: 24px;
  background: rgba(248, 246, 242, 0.9);
}

.empty-state strong {
  font-size: 16px;
}

.empty-state p {
  margin: 0;
  color: var(--muted);
  line-height: 1.7;
}

.job-state {
  display: grid;
  gap: 16px;
}

.job-status-head,
.recent-job-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
}

.status-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 78px;
  min-height: 30px;
  padding: 0 10px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 700;
}

.status-badge.queued {
  color: var(--warning);
  background: var(--warning-bg);
}

.status-badge.running {
  color: #2f5ec7;
  background: #edf3ff;
}

.status-badge.completed {
  color: var(--success);
  background: var(--success-bg);
}

.status-badge.failed {
  color: var(--danger);
  background: var(--danger-bg);
}

.job-topic {
  display: grid;
  gap: 14px;
  padding: 18px;
  border: 1px solid rgba(17, 17, 17, 0.08);
  border-radius: 22px;
  background: rgba(250, 249, 246, 0.92);
  line-height: 1.72;
  white-space: normal;
}

.recognized-problem-block {
  display: grid;
  gap: 8px;
}

.recognized-problem-label {
  color: var(--muted);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.04em;
}

.recognized-problem-title {
  font-size: 18px;
  line-height: 1.45;
}

.recognized-problem-text {
  color: var(--ink);
  line-height: 1.78;
  white-space: pre-wrap;
  word-break: break-word;
}

.final-answer-block {
  display: grid;
  gap: 8px;
  padding: 14px 16px;
  border: 1px solid rgba(29, 123, 86, 0.14);
  border-radius: 18px;
  background: linear-gradient(180deg, rgba(244, 252, 248, 0.98), rgba(237, 249, 243, 0.96));
}

.final-answer-label {
  color: var(--success);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.04em;
}

.final-answer-text {
  color: var(--ink);
  font-weight: 600;
  line-height: 1.72;
  white-space: pre-wrap;
  word-break: break-word;
}

.meta-summary {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.meta-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 32px;
  padding: 0 12px;
  border-radius: 999px;
  border: 1px solid rgba(17, 17, 17, 0.08);
  background: #ffffff;
  color: var(--muted);
  font-size: 12px;
}

.task-id-pill {
  gap: 10px;
}

.task-id-code,
.job-id-inline code {
  font-family: "SFMono-Regular", "Consolas", monospace;
  font-size: 12px;
  color: var(--ink);
}

.inline-copy-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 26px;
  padding: 0 10px;
  border: 1px solid rgba(17, 17, 17, 0.1);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.94);
  color: var(--ink);
  cursor: pointer;
}

.teacher-note-inline {
  color: var(--muted);
  font-size: 13px;
  line-height: 1.65;
  white-space: pre-wrap;
  word-break: break-word;
}

.recognized-problem-inline {
  color: var(--muted);
  font-size: 13px;
  line-height: 1.65;
  white-space: normal;
  word-break: break-word;
}

.recognized-problem-inline.compact {
  display: -webkit-box;
  overflow: hidden;
  text-overflow: ellipsis;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 2;
}

.final-answer-inline {
  color: #236846;
  font-size: 13px;
  line-height: 1.6;
  font-weight: 600;
  white-space: normal;
  word-break: break-word;
  display: -webkit-box;
  overflow: hidden;
  text-overflow: ellipsis;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 2;
}

.final-answer-inline.compact {
  -webkit-line-clamp: 1;
}

.teacher-note-inline.compact {
  display: -webkit-box;
  overflow: hidden;
  white-space: normal;
  text-overflow: ellipsis;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 2;
}

.progress-steps,
.recent-jobs {
  display: grid;
  gap: 10px;
}

.recent-jobs-summary {
  padding: 12px 14px;
  border: 1px dashed rgba(17, 17, 17, 0.12);
  border-radius: 18px;
  background: rgba(248, 246, 242, 0.9);
  color: var(--muted);
  font-size: 13px;
  line-height: 1.65;
}

.recent-job {
  display: grid;
  gap: 8px;
  padding: 14px 16px;
  border: 1px solid rgba(17, 17, 17, 0.08);
  border-radius: 20px;
  background: rgba(250, 249, 246, 0.92);
}

.progress-steps {
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
}

.progress-step {
  display: grid;
  gap: 12px;
  padding: 16px 14px;
  border: 1px solid rgba(17, 17, 17, 0.08);
  border-radius: 22px;
  background: rgba(250, 249, 246, 0.92);
  transition: border-color 160ms ease, box-shadow 160ms ease, transform 160ms ease;
}

.progress-marker {
  display: flex;
  align-items: center;
}

.progress-index {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  border: 1px solid rgba(17, 17, 17, 0.12);
  background: rgba(255, 255, 255, 0.96);
  color: var(--muted);
  font-size: 13px;
  font-weight: 700;
}

.progress-copy {
  display: grid;
  gap: 6px;
}

.progress-title {
  font-size: 14px;
  font-weight: 700;
}

.progress-desc {
  color: var(--muted);
  font-size: 13px;
  line-height: 1.6;
}

.progress-step.active {
  border-color: rgba(17, 17, 17, 0.18);
  box-shadow: 0 12px 30px rgba(17, 17, 17, 0.05);
  transform: translateY(-1px);
}

.progress-step.active .progress-index {
  border-color: #111111;
  background: #111111;
  color: #ffffff;
}

.progress-step.done .progress-index {
  border-color: rgba(29, 123, 86, 0.18);
  background: var(--success);
  color: #ffffff;
}

.progress-step.failed {
  border-color: rgba(163, 62, 62, 0.22);
  background: rgba(255, 245, 245, 0.92);
}

.progress-step.failed .progress-index {
  border-color: rgba(163, 62, 62, 0.16);
  background: var(--danger);
  color: #ffffff;
}

.status-block {
  display: grid;
  gap: 8px;
}

.status-note {
  min-height: 72px;
  padding: 16px 18px;
  border: 1px solid rgba(17, 17, 17, 0.08);
  border-radius: 20px;
  background: rgba(250, 249, 246, 0.92);
  color: var(--muted);
  line-height: 1.7;
}

.result-actions,
.recent-job-actions {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.result-actions a,
.result-actions button,
.recent-job-actions a,
.recent-job-actions button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 38px;
  padding: 0 14px;
  border: 1px solid rgba(17, 17, 17, 0.1);
  border-radius: 999px;
  background: #ffffff;
  color: var(--ink);
  text-decoration: none;
}

.result-actions a.primary-link {
  background: #111111;
  color: #ffffff;
  border-color: #111111;
}

.error-box {
  padding: 14px 16px;
  border-radius: 18px;
  background: var(--danger-bg);
  color: var(--danger);
  line-height: 1.7;
}

.recent-job-copy {
  display: grid;
  gap: 4px;
  min-width: 0;
}

.job-card-title {
  display: -webkit-box;
  overflow: hidden;
  text-overflow: ellipsis;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 2;
  line-height: 1.5;
  font-size: 14px;
}

.history-drawer-overlay {
  position: fixed;
  inset: 0;
  z-index: 40;
  display: flex;
  justify-content: flex-end;
  background: rgba(17, 17, 17, 0.3);
  opacity: 0;
  pointer-events: none;
  transition: opacity 180ms ease;
}

.history-drawer-overlay.open {
  opacity: 1;
  pointer-events: auto;
}

.history-drawer {
  width: min(680px, 100vw);
  height: 100vh;
  padding: 24px;
  display: grid;
  align-content: start;
  gap: 16px;
  overflow-y: auto;
  border-left: 1px solid rgba(17, 17, 17, 0.08);
  background: rgba(255, 255, 255, 0.98);
  box-shadow: -24px 0 60px rgba(17, 17, 17, 0.12);
  transform: translateX(32px);
  transition: transform 180ms ease;
}

.history-drawer-overlay.open .history-drawer {
  transform: translateX(0);
}

.history-drawer-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 14px;
}

.history-drawer-head h2 {
  margin: 10px 0 0;
  font-size: 30px;
  line-height: 1.06;
  letter-spacing: -0.04em;
}

.drawer-summary {
  margin: 12px 0 0;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.7;
}

.help-center-drawer {
  width: min(620px, 100vw);
  height: 100dvh;
  padding: 20px 20px 16px;
  gap: 18px;
  grid-template-rows: auto auto minmax(0, 1fr) auto auto;
  overflow: hidden;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.985), rgba(249, 246, 240, 0.98)),
    radial-gradient(circle at top left, rgba(145, 185, 255, 0.08), transparent 28%);
}

.help-center-drawer .history-drawer-head {
  gap: 10px;
}

.help-center-drawer .history-drawer-head h2 {
  margin-top: 8px;
  font-size: 28px;
}

.help-center-drawer .drawer-summary {
  margin-top: 8px;
  font-size: 12px;
  line-height: 1.55;
  max-width: 46ch;
}

.help-center-progress-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.help-center-dots {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.help-center-dot {
  width: 12px;
  height: 12px;
  padding: 0;
  border: 0;
  border-radius: 999px;
  background: rgba(17, 17, 17, 0.16);
  box-shadow: none;
  transition: transform 160ms ease, width 160ms ease, background 160ms ease, opacity 160ms ease;
}

.help-center-dot:hover {
  transform: scale(1.05);
}

.help-center-dot.active {
  width: 34px;
  background: linear-gradient(135deg, #1699e7, #2ac1ff);
}

.help-center-counter {
  color: var(--muted);
  font-size: 13px;
  font-weight: 700;
}

.help-center-cards {
  display: grid;
  min-height: 0;
  height: 100%;
}

.help-card {
  display: grid;
  align-content: start;
  gap: 12px;
  min-height: 100%;
  height: 100%;
  min-height: 0;
  padding: 20px;
  border: 1px solid rgba(17, 17, 17, 0.08);
  border-radius: 28px;
  background:
    radial-gradient(circle at top right, rgba(30, 153, 232, 0.1), transparent 30%),
    linear-gradient(180deg, rgba(255, 255, 255, 0.98), rgba(246, 242, 235, 0.94));
  box-shadow: 0 24px 56px rgba(17, 17, 17, 0.08);
  overflow: hidden;
}

.help-card.is-active {
  animation: help-card-enter 220ms ease;
}

@keyframes help-card-enter {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.help-card-topline {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

.help-card-tag {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 30px;
  padding: 0 12px;
  border-radius: 999px;
  background: rgba(17, 17, 17, 0.06);
  color: var(--ink);
  font-size: 12px;
  font-weight: 700;
}

.help-card-tag.subtle {
  color: var(--muted);
}

.help-card-index {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 30px;
  min-width: 46px;
  padding: 0 12px;
  border-radius: 999px;
  background: rgba(17, 17, 17, 0.05);
  color: var(--muted);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.12em;
}

.help-card-title {
  display: block;
  font-size: clamp(22px, 3vw, 30px);
  line-height: 1.06;
  letter-spacing: -0.04em;
}

.help-card-summary,
.help-card-body {
  margin: 0;
  color: var(--ink);
  line-height: 1.6;
  overflow: hidden;
  display: -webkit-box;
  -webkit-box-orient: vertical;
}

.help-card-summary {
  font-size: 16px;
  font-weight: 600;
  line-height: 1.45;
  -webkit-line-clamp: 3;
}

.help-card-body {
  color: var(--muted);
  -webkit-line-clamp: 4;
}

.help-card-points {
  margin: 0;
  padding-left: 18px;
  display: grid;
  gap: 8px;
  color: var(--muted);
  line-height: 1.55;
  overflow: hidden;
}

.help-card-points li {
  overflow: hidden;
  display: -webkit-box;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 2;
}

.help-card-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: auto;
}

.help-center-footer {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 16px;
  padding-top: 10px;
  border-top: 1px solid rgba(17, 17, 17, 0.08);
}

.help-center-step-label {
  color: var(--muted);
  font-size: 13px;
  font-weight: 700;
}

.help-center-footer-actions {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 10px;
  flex-wrap: wrap;
}

.help-center-keyboard-hint {
  color: var(--muted);
  font-size: 12px;
  text-align: center;
  letter-spacing: 0.02em;
}

@media (max-height: 860px) {
  .help-center-drawer {
    padding: 18px 18px 14px;
    gap: 12px;
  }

  .help-center-drawer .history-drawer-head h2 {
    font-size: 24px;
  }

  .help-center-drawer .drawer-summary {
    font-size: 11px;
    line-height: 1.45;
  }

  .help-card {
    padding: 18px;
    gap: 10px;
  }

  .help-card-title {
    font-size: 24px;
  }

  .help-card-summary {
    font-size: 15px;
    -webkit-line-clamp: 2;
  }

  .help-card-body {
    -webkit-line-clamp: 3;
  }

  .help-card-points li {
    -webkit-line-clamp: 1;
  }

  .help-center-keyboard-hint {
    display: none;
  }
}

.history-toolbar {
  display: grid;
  grid-template-columns: 180px 180px auto;
  gap: 12px;
  align-items: end;
}

.compact-field,
.history-search-field {
  min-width: 0;
}

.history-search-field {
  grid-column: 1 / -1;
  grid-row: 2;
}

.history-toolbar-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  grid-column: 3;
  grid-row: 1;
  justify-self: end;
}

@media (max-width: 1180px) {
  .history-toolbar {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .history-toolbar-actions {
    grid-column: 1 / -1;
    grid-row: 3;
    justify-self: start;
  }
}

.history-results-meta,
.history-pagination {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.history-results-meta {
  color: var(--muted);
  font-size: 13px;
}

.history-jobs-list {
  display: grid;
  gap: 12px;
}

.history-job {
  display: grid;
  gap: 8px;
  padding: 16px 18px;
  border: 1px solid rgba(17, 17, 17, 0.08);
  border-radius: 22px;
  background: rgba(250, 249, 246, 0.92);
}

.history-job.active {
  border-color: rgba(17, 17, 17, 0.16);
  box-shadow: 0 10px 30px rgba(17, 17, 17, 0.06);
}

.history-job-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
}

.history-job-copy {
  display: grid;
  gap: 4px;
  min-width: 0;
}

.history-job .job-card-title {
  font-size: 15px;
}

.history-job-actions {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.history-job-actions a,
.history-job-actions button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 38px;
  padding: 0 14px;
  border: 1px solid rgba(17, 17, 17, 0.1);
  border-radius: 999px;
  background: #ffffff;
  color: var(--ink);
  text-decoration: none;
}

.hidden {
  display: none !important;
}

.toast {
  position: fixed;
  right: 24px;
  bottom: 24px;
  z-index: 30;
  padding: 12px 16px;
  border: 1px solid rgba(17, 17, 17, 0.08);
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.96);
  color: var(--ink);
  box-shadow: var(--shadow-sm);
}

@media (max-width: 1180px) {
  .task-board {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 920px) {
  .topbar-announcement {
    flex-direction: column;
    align-items: flex-start;
    max-width: none;
  }

  .meta-row,
  .config-grid {
    grid-template-columns: 1fr;
  }

  .hero-copy h1 {
    max-width: none;
    white-space: normal;
  }

  .progress-steps {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .workflow-tabs {
    flex: 1 1 100%;
    justify-content: center;
  }

  .workflow-tabs.prominent {
    width: 100%;
  }

  .submit-fab {
    margin-left: 0;
  }
}

@media (max-width: 760px) {
  .page-shell {
    width: min(100% - 20px, 100%);
    padding-top: 14px;
  }

  .topbar,
  .panel-head,
  .job-status-head,
  .recent-job-head,
  .history-job-head,
  .history-drawer-head,
  .help-center-footer,
  .composer-footer {
    flex-direction: column;
    align-items: flex-start;
  }

  .panel-actions,
  .history-toolbar-actions {
    justify-content: flex-start;
  }

  .topbar-announcement {
    width: 100%;
    min-width: 0;
  }

  .topbar-actions {
    margin-left: 0;
  }

  .hero-copy p,
  .hero-copy h1 {
    max-width: none;
  }

  .hero-copy h1 {
    font-size: 32px;
  }

  .composer-panel,
  .status-card,
  .history-card {
    padding: 18px;
    border-radius: 28px;
  }

  .upload-chip,
  .submit-fab {
    width: 100%;
    justify-content: center;
  }

  .workflow-tabs,
  .mode-pills {
    width: 100%;
  }

  .workflow-tabs.prominent {
    grid-template-columns: 1fr;
  }

  .toggle-pill {
    width: 100%;
    justify-content: center;
  }

  .image-preview {
    grid-template-columns: 1fr;
  }

  .image-preview img {
    width: 100%;
    height: auto;
    aspect-ratio: 16 / 10;
  }

  .history-toolbar {
    grid-template-columns: 1fr;
  }

  .history-search-field,
  .history-toolbar-actions {
    grid-column: auto;
    grid-row: auto;
  }

  .progress-steps {
    grid-template-columns: 1fr;
  }

  .history-results-meta,
  .history-pagination {
    flex-direction: column;
    align-items: flex-start;
  }

  .history-drawer {
    width: 100vw;
    padding: 20px 16px 24px;
  }

  .help-center-progress-row,
  .help-center-footer-actions {
    width: 100%;
  }

  .help-center-progress-row,
  .help-center-footer-actions {
    justify-content: space-between;
  }

  .help-center-cards {
    min-height: 340px;
  }

  .help-card {
    padding: 20px;
  }

  .help-card-title {
    font-size: 28px;
  }

  .help-card-summary {
    font-size: 16px;
  }

  .help-center-footer-actions .ghost-link,
  .help-center-footer-actions .primary-link.subtle {
    flex: 1 1 calc(50% - 6px);
  }
}