:root {
  color-scheme: light;
  --bg-base: #eef5ff;
  --bg-soft: #f6f9ff;
  --surface: rgba(255, 255, 255, 0.9);
  --surface-strong: rgba(255, 255, 255, 0.98);
  --surface-tint: rgba(221, 234, 254, 0.78);
  --line: rgba(29, 55, 99, 0.12);
  --line-strong: rgba(17, 86, 184, 0.18);
  --text-primary: #1d3763;
  --text-secondary: rgba(29, 55, 99, 0.72);
  --motion-primary: #1156b8;
  --motion-tertiary: #0f3d90;
  --motion-soft: rgba(17, 86, 184, 0.1);
  --motion-soft-strong: rgba(17, 86, 184, 0.18);
  --ui-primary: #ddeafe;
  --ui-secondary: #f0f6ff;
  --ui-white: #f6faff;
  --event-primary: #ffbf00;
  --control-primary: #ffab19;
  --motion-block: #4c97ff;
  --looks-primary: #9966ff;
  --success: #30c96c;
  --shadow-xl: 0 24px 80px rgba(17, 53, 118, 0.12);
  --shadow-lg: 0 18px 44px rgba(17, 53, 118, 0.1);
  --shadow-md: 0 12px 24px rgba(17, 53, 118, 0.08);
  --radius-xl: 30px;
  --radius-lg: 22px;
  --radius-md: 16px;
  --radius-sm: 12px;
  --content-width: 1280px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(circle at 12% 16%, rgba(145, 247, 255, 0.22), transparent 28%),
    radial-gradient(circle at 86% 12%, rgba(98, 181, 255, 0.18), transparent 24%),
    linear-gradient(180deg, #f7fbff 0%, #eef5ff 38%, #e8f0fd 100%);
  color: var(--text-primary);
  font-family:
    "Inter", "SF Pro Display", "PingFang SC", "Microsoft YaHei", ui-sans-serif, system-ui, sans-serif;
  letter-spacing: 0;
}

a {
  color: inherit;
  text-decoration: none;
}

button,
input,
textarea {
  font: inherit;
}

button {
  border: 0;
}

#signalCanvas {
  position: fixed;
  inset: 0;
  width: 100vw;
  height: 100vh;
  opacity: 0.42;
  pointer-events: none;
  z-index: -1;
}

.site-header,
.portal-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 28px;
  min-height: 78px;
  padding: 0 max(24px, calc((100vw - var(--content-width)) / 2));
  border-bottom: 1px solid rgba(255, 255, 255, 0.14);
  color: var(--ui-white);
  background: linear-gradient(90deg, #0f3d90 0%, #1156b8 42%, #0d448f 100%);
  box-shadow: 0 10px 28px rgba(5, 18, 48, 0.18);
  backdrop-filter: blur(18px);
}

.brand,
.header-actions,
.main-nav,
.portal-actions,
.portal-nav {
  display: flex;
  align-items: center;
}

.brand {
  gap: 14px;
  min-width: 0;
}

.brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  flex-shrink: 0;
  border-radius: 14px;
  background: radial-gradient(circle at 35% 30%, rgba(118, 214, 255, 0.28), rgba(17, 38, 84, 0.08) 68%);
  box-shadow: 0 8px 18px rgba(6, 15, 36, 0.2);
}

.brand-mark img {
  width: 28px;
  height: 28px;
  display: block;
}

.brand-mark--dialog {
  width: 52px;
  height: 52px;
}

.brand-mark--dialog img {
  width: 32px;
  height: 32px;
}

.brand-text {
  display: flex;
  flex-direction: column;
  min-width: 0;
  line-height: 1.05;
}

.brand-name {
  font-size: 18px;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.brand-subtitle {
  margin-top: 3px;
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.14em;
  opacity: 0.82;
  text-transform: uppercase;
}

.main-nav,
.portal-nav {
  justify-content: center;
  gap: 6px;
}

.portal-nav {
  flex-wrap: wrap;
}

.main-nav a,
.portal-nav a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 40px;
  padding: 0 14px;
  border-radius: 999px;
  color: rgba(246, 250, 255, 0.82);
  font-size: 14px;
  font-weight: 600;
  transition: background-color 160ms ease, color 160ms ease, transform 160ms ease;
  white-space: nowrap;
}

.main-nav a:hover,
.main-nav a:focus-visible,
.portal-nav a:hover,
.portal-nav a:focus-visible {
  background: rgba(255, 255, 255, 0.12);
  color: var(--ui-white);
  transform: translateY(-1px);
}

.main-nav a.is-active,
.portal-nav a.is-active {
  background: rgba(255, 255, 255, 0.16);
  color: var(--ui-white);
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.12);
}

.header-actions,
.portal-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

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

.language-switch,
.login-button,
.secondary-action,
.primary-action,
.editor-link,
.dialog-close,
.nav-toggle {
  border: 1px solid transparent;
  border-radius: 999px;
  cursor: pointer;
  transition: transform 160ms ease, box-shadow 160ms ease, background-color 160ms ease, border-color 160ms ease;
}

.language-switch,
.login-button,
.nav-toggle {
  min-height: 40px;
  padding: 0 14px;
}

.language-switch,
.nav-toggle {
  color: var(--ui-white);
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(255, 255, 255, 0.12);
}

.language-switch:hover,
.nav-toggle:hover {
  background: rgba(255, 255, 255, 0.14);
}

.primary-action,
.login-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 50px;
  padding: 0 20px;
  font-weight: 800;
  color: var(--ui-white);
  background: linear-gradient(135deg, #1156b8 0%, #3478db 100%);
  box-shadow: 0 14px 28px rgba(17, 86, 184, 0.22);
}

.primary-action:disabled {
  cursor: wait;
  opacity: 0.7;
  transform: none;
}

.primary-action:hover,
.login-button:hover,
.secondary-action:hover,
.editor-link:hover {
  transform: translateY(-1px);
}

.secondary-action,
.editor-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 50px;
  padding: 0 18px;
  font-weight: 700;
  color: var(--motion-primary);
  background: rgba(255, 255, 255, 0.86);
  border-color: rgba(17, 86, 184, 0.16);
  box-shadow: 0 10px 22px rgba(17, 86, 184, 0.08);
}

.admin-link {
  min-height: 40px;
  padding: 0 16px;
  font-weight: 700;
}

.nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  padding: 10px;
}

.nav-toggle span {
  display: block;
  height: 2px;
  margin: 5px 0;
  background: var(--ui-white);
}

main {
  position: relative;
}

.hero-section {
  display: grid;
  grid-template-columns: minmax(0, 1.04fr) minmax(360px, 0.88fr);
  align-items: stretch;
  gap: 52px;
  width: min(var(--content-width), calc(100vw - 48px));
  min-height: calc(100vh - 78px);
  margin: 0 auto;
  padding: 84px 0 98px;
}

.hero-copy {
  max-width: 760px;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.eyebrow {
  margin: 0 0 16px;
  color: var(--motion-primary);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

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

h1 {
  margin: 0;
  font-size: clamp(42px, 6vw, 78px);
  line-height: 0.98;
  letter-spacing: -0.03em;
}

.hero-copy h1 {
  display: flex;
  flex-direction: column;
  gap: 10px;
  white-space: pre-line;
}

.hero-title-main {
  display: block;
}

.hero-title-sub {
  display: block;
  font-size: 0.56em;
  line-height: 1.08;
  letter-spacing: -0.015em;
  font-weight: 700;
}

h2 {
  margin: 0;
  font-size: clamp(30px, 4.2vw, 52px);
  line-height: 1.04;
  letter-spacing: -0.03em;
}

h3 {
  margin: 0;
  font-size: 22px;
}

.hero-lede,
.section-heading p {
  color: var(--text-secondary);
  font-size: clamp(16px, 1.85vw, 20px);
  line-height: 1.75;
}

.hero-lede {
  max-width: 700px;
  margin: 26px 0 0;
}

.hero-actions,
.prompt-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

.hero-actions {
  margin-top: 34px;
}

.agent-stage,
.training-console,
.creator-workbench,
.feature-card,
.lab-card,
.course-card,
.training-type {
  border: 1px solid var(--line);
  background: var(--surface);
  box-shadow: var(--shadow-lg);
  backdrop-filter: blur(16px);
}

.agent-stage {
  overflow: hidden;
  border-radius: var(--radius-xl);
}

.hero-vision-card {
  position: relative;
  min-height: 0;
  height: 100%;
  padding: 0;
  border: 0;
  background: transparent;
  box-shadow: none;
  backdrop-filter: none;
  display: flex;
  align-items: stretch;
}

.hero-vision-glow {
  display: none;
}

.hero-vision-image {
  position: relative;
  z-index: 1;
  display: block;
  width: 100%;
  height: 100%;
  box-shadow: none;
  object-fit: contain;
  object-position: center;
}

.agent-toolbar,
.console-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 58px;
  padding: 0 22px;
  border-bottom: 1px solid var(--line);
  color: var(--text-secondary);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.9) 0%, rgba(240, 246, 255, 0.94) 100%);
}

.status-dot {
  width: 10px;
  height: 10px;
  border-radius: 999px;
  background: var(--success);
  box-shadow: 0 0 18px rgba(48, 201, 108, 0.52);
}

.prompt-line {
  margin: 24px 24px 18px;
  padding: 18px 20px;
  border: 1px solid rgba(17, 86, 184, 0.12);
  border-radius: 18px;
  background: rgba(17, 86, 184, 0.05);
  color: var(--text-primary);
  line-height: 1.65;
}

.blocks-preview,
.generated-stack {
  padding: 0 24px 24px;
}

.content-band {
  padding: 96px 0;
}

.content-band > *:not(.section-heading) {
  width: min(var(--content-width), calc(100vw - 48px));
  margin-left: auto;
  margin-right: auto;
}

.content-band .section-heading {
  width: min(var(--content-width), calc(100vw - 48px));
  margin: 0 auto 38px;
}

.featured-band,
.training-band {
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.12) 0%, rgba(221, 234, 254, 0.2) 100%);
}

.section-heading {
  max-width: 840px;
}

.feature-grid,
.lab-grid,
.course-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
}

.feature-card,
.lab-card,
.course-card {
  min-height: 234px;
  padding: 26px;
  border-radius: var(--radius-lg);
}

.feature-card p,
.lab-card p,
.course-card p {
  margin: 0;
  color: var(--text-secondary);
  line-height: 1.7;
}

.feature-icon,
.lab-badge,
.course-level {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 54px;
  height: 34px;
  margin-bottom: 18px;
  padding: 0 12px;
  border-radius: 999px;
  background: rgba(17, 86, 184, 0.1);
  color: var(--motion-primary);
  font-size: 13px;
  font-weight: 900;
}

.lab-card {
  position: relative;
  overflow: hidden;
}

.lab-card::after {
  content: "";
  position: absolute;
  right: 22px;
  bottom: 18px;
  width: 84px;
  height: 84px;
  border: 1px solid rgba(17, 86, 184, 0.12);
  border-radius: 24px;
  transform: rotate(12deg);
}

.training-layout {
  display: grid;
  grid-template-columns: minmax(0, 0.92fr) minmax(360px, 1fr);
  gap: 24px;
}

.training-overview {
  display: grid;
  gap: 18px;
}

.training-copy {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 0 2px;
}

.training-copy-label {
  margin: 0;
  color: var(--text-secondary);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.training-copy-state {
  color: var(--motion-primary);
  font-size: 14px;
  font-weight: 800;
}

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

.training-type {
  display: grid;
  gap: 10px;
  min-height: 120px;
  padding: 20px 22px;
  border-radius: var(--radius-lg);
}

.training-type strong {
  display: block;
  font-size: 20px;
  line-height: 1.1;
}

.training-type span {
  color: var(--text-secondary);
  line-height: 1.6;
}

.prompt-actions--training {
  justify-content: flex-start;
}

.training-console,
.creator-workbench {
  border-radius: var(--radius-xl);
}

.training-console--sketch {
  overflow: hidden;
  padding: 26px 24px;
}

.training-sketch {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 42px minmax(0, 0.92fr) 42px minmax(0, 0.94fr);
  align-items: center;
  gap: 0;
  min-height: 100%;
}

.training-sketch-link {
  position: relative;
  height: 2px;
  background: linear-gradient(90deg, rgba(17, 86, 184, 0.14), rgba(17, 86, 184, 0.42));
}

.training-sketch-link::after {
  content: "";
  position: absolute;
  right: -2px;
  top: -4px;
  width: 10px;
  height: 10px;
  border-top: 2px solid rgba(17, 86, 184, 0.42);
  border-right: 2px solid rgba(17, 86, 184, 0.42);
  transform: rotate(45deg);
}

.training-sketch-stage {
  display: grid;
  gap: 14px;
  padding: 18px;
  min-height: 238px;
  border: 1px solid rgba(17, 86, 184, 0.12);
  border-radius: 24px;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.96), rgba(238, 245, 255, 0.88));
}

.training-sketch-title {
  color: var(--text-primary);
  font-size: 18px;
  font-weight: 800;
}

.training-sketch-samples {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  align-self: end;
}

.training-sketch-samples span {
  position: relative;
  min-height: 122px;
  border-radius: 22px;
  border: 1px dashed rgba(17, 86, 184, 0.24);
  background: linear-gradient(180deg, rgba(224, 237, 255, 0.82), rgba(245, 250, 255, 0.96));
}

.training-sketch-samples span::before,
.training-sketch-samples span::after {
  content: "";
  position: absolute;
  border-radius: 999px;
  background: rgba(17, 86, 184, 0.22);
}

.training-sketch-samples span::before {
  top: 22px;
  left: 50%;
  width: 22px;
  height: 22px;
  transform: translateX(-50%);
}

.training-sketch-samples span::after {
  left: 50%;
  bottom: 20px;
  width: 52px;
  height: 52px;
  transform: translateX(-50%);
  border-radius: 18px;
}

.training-sketch-progress {
  align-self: center;
  min-height: 18px;
  padding: 3px;
  border-radius: 999px;
  background: rgba(17, 86, 184, 0.1);
}

.training-sketch-progress span {
  display: block;
  width: 78%;
  height: 100%;
  border-radius: 999px;
  background: linear-gradient(90deg, #22c55e 0%, #06b6d4 100%);
}

.training-sketch-chip-row {
  display: flex;
  gap: 8px;
  align-self: end;
}

.training-sketch-chip-row span {
  flex: 1;
  min-height: 14px;
  border-radius: 999px;
  background: rgba(17, 86, 184, 0.12);
}

.training-sketch-result {
  min-height: 94px;
  border-radius: 22px;
  background: linear-gradient(135deg, rgba(17, 86, 184, 0.16), rgba(17, 86, 184, 0.04));
}

.training-sketch-bars {
  display: grid;
  gap: 10px;
  align-self: end;
}

.training-sketch-bars span {
  position: relative;
  display: block;
  min-height: 14px;
  border-radius: 999px;
  background: rgba(17, 86, 184, 0.1);
}

.training-sketch-bars span::before {
  content: "";
  display: block;
  height: 100%;
  border-radius: inherit;
}

.training-sketch-bars span:nth-child(1)::before {
  width: 78%;
  background: linear-gradient(90deg, #1156b8 0%, #3b82f6 100%);
}

.training-sketch-bars span:nth-child(2)::before {
  width: 52%;
  background: linear-gradient(90deg, #8b5cf6 0%, #a855f7 100%);
}

.training-sketch-bars span:nth-child(3)::before {
  width: 34%;
  background: linear-gradient(90deg, #06b6d4 0%, #2dd4bf 100%);
}

.creator-workbench {
  display: grid;
  grid-template-columns: minmax(360px, 0.86fr) minmax(0, 1.14fr);
  overflow: hidden;
}

.prompt-panel {
  display: grid;
  gap: 22px;
  align-content: start;
  padding: 30px;
  border-right: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.9), rgba(242, 248, 255, 0.94));
}

.prompt-panel label {
  color: var(--text-secondary);
  font-weight: 800;
}

.creator-panel-copy,
.creator-preview-copy {
  display: grid;
  gap: 8px;
}

.creator-panel-copy h3,
.creator-preview-copy h3 {
  margin: 0;
  font-size: 24px;
}

.creator-panel-copy p,
.creator-preview-copy p {
  margin: 0;
  color: var(--text-secondary);
  line-height: 1.7;
}

.creator-faux-input {
  display: grid;
  gap: 10px;
}

.creator-faux-label {
  color: var(--text-secondary);
  font-size: 13px;
  font-weight: 800;
}

.creator-faux-box {
  min-height: 120px;
  padding: 18px 20px;
  border: 1px solid rgba(17, 86, 184, 0.12);
  border-radius: 22px;
  background: rgba(255, 255, 255, 0.96);
  color: var(--text-primary);
  font-size: 17px;
  line-height: 1.75;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.72);
}

.creator-highlights {
  display: grid;
  gap: 14px;
}

.creator-highlight {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 14px;
  align-items: start;
  width: 100%;
  padding: 16px 18px;
  border: 1px solid rgba(17, 86, 184, 0.1);
  border-radius: 18px;
  background: rgba(17, 86, 184, 0.04);
  color: inherit;
  text-align: left;
  cursor: pointer;
  transition: transform 160ms ease, border-color 160ms ease, background-color 160ms ease, box-shadow 160ms ease;
}

.creator-highlight:hover,
.creator-highlight:focus-visible {
  transform: translateY(-1px);
  border-color: rgba(17, 86, 184, 0.18);
  background: rgba(17, 86, 184, 0.07);
}

.creator-highlight.is-active {
  border-color: rgba(17, 86, 184, 0.28);
  background: rgba(17, 86, 184, 0.1);
  box-shadow: 0 12px 28px rgba(17, 86, 184, 0.08);
}

.creator-highlight-index {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 44px;
  height: 30px;
  padding: 0 10px;
  border-radius: 999px;
  background: rgba(17, 86, 184, 0.12);
  color: var(--motion-primary);
  font-size: 13px;
  font-weight: 900;
}

.creator-highlight h4 {
  margin: 0 0 6px;
  font-size: 17px;
  line-height: 1.4;
}

.creator-highlight p {
  margin: 0;
  color: var(--text-secondary);
  line-height: 1.68;
}

.creator-panel-eyebrow {
  margin: 0;
  color: var(--motion-primary);
  font-size: 12px;
  font-weight: 900;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

textarea,
input {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.94);
  color: var(--text-primary);
  outline: none;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.72);
}

textarea:focus,
input:focus {
  border-color: rgba(17, 86, 184, 0.26);
  box-shadow: 0 0 0 4px rgba(17, 86, 184, 0.08);
}

textarea {
  resize: vertical;
  min-height: 160px;
  padding: 18px 20px;
  line-height: 1.7;
}

input {
  min-height: 48px;
  padding: 0 14px;
}

.generated-stack {
  min-height: 360px;
}

.generated-stack--workbench {
  padding: 0;
}

.generated-stack--workbench .scratch-preview-card {
  gap: 14px;
  padding: 18px;
}

.creator-preview-panel {
  display: grid;
  gap: 22px;
  padding: 30px;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.86), rgba(245, 250, 255, 0.94));
}

.prompt-actions--creator {
  align-items: center;
}

.primary-action--wide {
  min-width: 240px;
}

.scratch-preview-card {
  display: grid;
  gap: 16px;
  padding: 22px;
  border: 1px solid rgba(17, 86, 184, 0.12);
  border-radius: 24px;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.98) 0%, rgba(240, 246, 255, 0.94) 100%);
  box-shadow: 0 14px 36px rgba(17, 86, 184, 0.08);
}

.scratch-preview-card--compact {
  padding: 0;
  border: 0;
  border-radius: 0;
  background: transparent;
  box-shadow: none;
}

.scratch-preview-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 20px;
}

.scratch-preview-intro {
  margin: 0 0 8px;
  color: var(--text-secondary);
  font-size: 14px;
}

.scratch-preview-title {
  margin: 0;
  font-size: 22px;
}

.preview-badge {
  display: inline-flex;
  align-items: center;
  min-height: 34px;
  padding: 0 14px;
  border-radius: 999px;
  background: rgba(17, 86, 184, 0.1);
  color: var(--motion-primary);
  font-size: 13px;
  font-weight: 800;
  white-space: nowrap;
}

.scratch-preview-surface {
  display: flex;
  align-items: flex-start;
  justify-content: flex-start;
  overflow: auto;
  padding: 14px;
  border: 1px solid rgba(17, 86, 184, 0.08);
  border-radius: 20px;
  background:
    linear-gradient(rgba(17, 86, 184, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(17, 86, 184, 0.04) 1px, transparent 1px),
    rgba(247, 250, 255, 0.96);
  background-size: 24px 24px;
}

.generated-stack--workbench .scratch-preview-surface {
  align-items: center;
  justify-content: center;
  min-height: 320px;
  padding: 18px;
}

.scratch-preview-card--compact .scratch-preview-surface {
  min-height: 360px;
  padding: 10px;
  border-radius: 20px;
}

.scratch-preview-surface svg {
  display: block;
  width: auto;
  max-width: none;
  height: auto;
  flex: 0 0 auto;
}

.scratch-preview-surface img,
.scratch-preview-image {
  display: block;
  width: auto;
  max-width: 100%;
  height: auto;
  border-radius: 16px;
}

.generated-stack--workbench .scratch-preview-image {
  max-height: 320px;
  max-width: min(100%, 520px);
  object-fit: contain;
}

.generated-stack--workbench .scratch-preview-image--wide {
  max-width: min(100%, 360px);
}

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

.preview-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.preview-chip {
  display: inline-flex;
  align-items: center;
  min-height: 30px;
  padding: 0 12px;
  border-radius: 999px;
  background: rgba(17, 86, 184, 0.1);
  color: var(--motion-primary);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.02em;
}

.preview-caption,
.preview-note {
  margin: 0;
  color: var(--text-secondary);
  line-height: 1.65;
}

.preview-caption {
  color: var(--text-primary);
  font-weight: 700;
}

.preview-error {
  margin: 0;
  color: var(--motion-tertiary);
  line-height: 1.65;
}

.course-card {
  display: grid;
  align-content: start;
  gap: 8px;
  text-align: left;
  color: var(--text-primary);
  cursor: pointer;
}

.course-card:hover,
.course-card:focus-visible,
.feature-card:hover,
.lab-card:hover,
.training-type:hover {
  border-color: rgba(17, 86, 184, 0.18);
  transform: translateY(-2px);
  transition: transform 180ms ease, border-color 180ms ease, box-shadow 180ms ease;
  box-shadow: var(--shadow-xl);
}

.course-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 10px;
}

.course-meta span,
.resource-chip {
  display: inline-flex;
  min-height: 30px;
  align-items: center;
  padding: 0 10px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--text-secondary);
  font-size: 13px;
}

dialog {
  width: min(760px, calc(100vw - 32px));
  border: 1px solid var(--line);
  border-radius: 28px;
  background: rgba(255, 255, 255, 0.98);
  color: var(--text-primary);
  box-shadow: var(--shadow-xl);
}

dialog[open] {
  position: fixed;
  top: 50%;
  left: 50%;
  margin: 0;
  transform: translate(-50%, -50%);
  z-index: 1000;
}

dialog::backdrop {
  background: rgba(15, 61, 144, 0.32);
  backdrop-filter: blur(8px);
}

body[data-auth-dialog-open="true"]::after {
  content: "";
  position: fixed;
  inset: 0;
  background: rgba(15, 61, 144, 0.32);
  backdrop-filter: blur(8px);
  z-index: 999;
}

.dialog-close {
  position: absolute;
  top: 14px;
  right: 14px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  color: var(--text-primary);
  font-size: 24px;
  background: rgba(17, 86, 184, 0.08);
}

.course-detail {
  padding: 30px;
}

.course-detail p,
.course-detail li,
.auth-form p {
  color: var(--text-secondary);
  line-height: 1.7;
}

.module-list {
  display: grid;
  gap: 10px;
  margin: 18px 0;
  padding: 0;
  list-style: none;
}

.module-list li {
  padding: 14px 16px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: rgba(240, 246, 255, 0.72);
}

.resource-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.auth-form {
  display: grid;
  gap: 16px;
  padding: 38px 34px 34px;
}

.auth-form h2 {
  font-size: 32px;
}

.auth-form label {
  display: grid;
  gap: 8px;
  color: var(--text-secondary);
}

.auth-message {
  margin: -4px 0 0;
  min-height: 24px;
  font-size: 14px;
  font-weight: 600;
}

.auth-message[data-tone="error"] {
  color: #bf2d2d;
}

.auth-message[data-tone="warn"] {
  color: #a25b00;
}

.auth-message[data-tone="info"],
.auth-message[data-tone="success"] {
  color: var(--motion-primary);
}

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  width: min(var(--content-width), calc(100vw - 48px));
  margin: 0 auto;
  padding: 30px 0 42px;
  border-top: 1px solid var(--line);
  color: var(--text-secondary);
}

.site-footer-record {
  color: inherit;
  text-decoration: none;
  transition: color 0.2s ease, opacity 0.2s ease;
}

.site-footer-record:hover,
.site-footer-record:focus-visible {
  color: var(--text-primary);
  opacity: 0.88;
}

@media (max-width: 1120px) {
  .site-header {
    grid-template-columns: auto auto 1fr;
    gap: 14px;
    padding-left: 24px;
    padding-right: 24px;
  }

  .nav-toggle {
    display: block;
  }

  .main-nav {
    position: fixed;
    top: 78px;
    left: 0;
    right: 0;
    display: none;
    flex-direction: column;
    align-items: stretch;
    padding: 18px 24px 24px;
    background: linear-gradient(180deg, #10428f 0%, #0f3d90 100%);
    box-shadow: 0 22px 34px rgba(5, 18, 48, 0.18);
  }

  .main-nav.is-open {
    display: flex;
  }

  .main-nav a {
    justify-content: flex-start;
    min-height: 44px;
  }

  .header-actions,
  .portal-actions {
    justify-content: end;
  }

  .portal-header {
    grid-template-columns: 1fr auto;
    grid-template-areas:
      "brand actions"
      "nav nav";
    row-gap: 12px;
    padding-top: 14px;
    padding-bottom: 14px;
  }

  .portal-header .brand {
    grid-area: brand;
  }

  .portal-header .portal-actions {
    grid-area: actions;
  }

  .portal-header .portal-nav {
    grid-area: nav;
    width: 100%;
    justify-content: flex-start;
    gap: 8px;
  }

  .hero-section,
  .training-layout,
  .creator-workbench {
    grid-template-columns: 1fr;
  }

  .hero-section {
    min-height: auto;
    padding-top: 52px;
  }

  .prompt-panel {
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

}

@media (max-width: 760px) {
  .site-header,
  .portal-header {
    min-height: 70px;
    padding-left: 18px;
    padding-right: 18px;
  }

  .main-nav {
    top: 70px;
    padding-left: 18px;
    padding-right: 18px;
  }

  .brand-subtitle {
    display: none;
  }

  .language-switch,
  .login-button {
    padding: 0 10px;
    font-size: 13px;
  }

  .hero-section,
  .content-band > *,
  .content-band .section-heading,
  .site-footer {
    width: calc(100vw - 32px);
  }

  h1 {
    font-size: 40px;
  }

  .feature-grid,
  .lab-grid,
  .course-grid,
  .training-types,
  .model-flow {
    grid-template-columns: 1fr;
  }

  .content-band {
    padding: 72px 0;
  }

  .scratch-preview-header {
    flex-direction: column;
  }

  .scratch-preview-card--compact .scratch-preview-surface {
    min-height: 296px;
  }

  .site-footer {
    flex-direction: column;
  }
}