:root {
  --color-ink: #1d1f26;
  --color-muted: #606673;
  --color-page: #f3f6fb;
  --color-surface: #ffffff;
  --color-line: #d8e2ef;
  --color-primary: #2f73b8;
  --color-primary-dark: #173a63;
  --color-secondary: #4a8ad4;
  --color-danger: #ea3323;
  --color-accent: #f7ce46;
  --color-soft-accent: #fadf70;
  --color-cream: #fff6e8;
  --color-charcoal: #173a63;
  --color-charcoal-deep: #0f2744;
  --color-warning: #fadf70;
  --shadow-panel: 0 24px 70px rgba(23, 58, 99, 0.12);
  color: var(--color-ink);
  background: var(--color-page);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  min-height: 100vh;
  margin: 0;
  background:
    linear-gradient(180deg, var(--color-cream) 0, #fffaf3 580px, var(--color-page) 580px),
    var(--color-page);
}

h1,
h2,
h3,
h4,
p,
label,
button,
input,
textarea,
li,
dt,
dd {
  letter-spacing: 0;
  overflow-wrap: anywhere;
}

h1 {
  margin: 0;
  color: var(--color-primary-dark);
  font-size: clamp(34px, 4vw, 52px);
  line-height: 1;
}

h2 {
  margin: 0 0 12px;
  color: var(--color-primary-dark);
  font-size: 30px;
  line-height: 1.15;
}

h3 {
  margin: 0 0 14px;
  color: var(--color-primary-dark);
  font-size: 22px;
  line-height: 1.2;
}

h4 {
  margin: 0 0 8px;
  font-size: 17px;
  line-height: 1.35;
}

p,
li {
  color: #343845;
  font-size: 17px;
  line-height: 1.6;
}

ul,
ol {
  padding-left: 24px;
}

li::marker {
  color: var(--color-accent);
}

button {
  min-width: 112px;
  padding: 12px 18px;
  border: 0;
  border-radius: 999px;
  background: var(--color-accent);
  color: #1d1f26;
  font-size: 15px;
  font-weight: 800;
  cursor: pointer;
}

button:hover:not(:disabled) {
  background: var(--color-soft-accent);
}

button:focus-visible,
input:focus-visible,
textarea:focus-visible,
.question label:focus-within {
  outline: 3px solid var(--color-warning);
  outline-offset: 2px;
}

button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.eyebrow {
  margin: 0 0 8px;
  color: var(--color-accent);
  font-size: 12px;
  font-weight: 800;
  text-transform: uppercase;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
}

.subtitle {
  max-width: 820px;
  margin: 14px 0 0;
  color: rgba(255, 255, 255, 0.86);
  font-size: 18px;
  line-height: 1.55;
}

.app-shell {
  width: 100%;
  margin: 0 auto 40px;
}

.fatal-error {
  margin: 16px auto 0;
  width: min(960px, calc(100% - 32px));
  padding: 14px 16px;
  border: 1px solid color-mix(in srgb, var(--color-danger) 30%, white);
  border-radius: 8px;
  background: color-mix(in srgb, var(--color-danger) 10%, white);
  color: #7d1b16;
  font-weight: 800;
}

.app-header {
  position: relative;
  isolation: isolate;
  display: grid;
  align-items: center;
  width: min(1560px, calc(100% - 32px));
  margin: 24px auto 0;
  padding: 0;
  overflow: hidden;
  border: 1px solid color-mix(in srgb, var(--color-line) 74%, white);
  border-radius: 26px;
  background:
    linear-gradient(144deg, var(--color-charcoal-deep) 0 48%, transparent 48.2% 100%),
    linear-gradient(144deg, transparent 0 58%, color-mix(in srgb, var(--color-primary) 36%, white) 58% 68%, transparent 68.2% 100%),
    linear-gradient(154deg, transparent 0 70%, color-mix(in srgb, var(--color-danger) 88%, transparent) 70% 78%, var(--color-accent) 78% 86%, transparent 86.2% 100%),
    var(--color-cream);
  color: var(--color-ink);
  box-shadow: var(--shadow-panel);
}

.app-header::before,
.app-header::after {
  position: absolute;
  content: "";
  pointer-events: none;
  z-index: 0;
}

.app-header::before {
  right: 11%;
  top: -118px;
  width: 520px;
  height: 520px;
  border: 36px solid color-mix(in srgb, var(--color-soft-accent) 58%, transparent);
  border-radius: 999px;
  opacity: 0.5;
}

.app-header::after {
  right: -110px;
  bottom: -128px;
  width: min(58vw, 760px);
  height: 330px;
  background:
    linear-gradient(122deg, transparent 0 26%, var(--color-charcoal-deep) 26% 48%, transparent 48.2% 100%),
    linear-gradient(64deg, transparent 0 44%, var(--color-danger) 44% 58%, var(--color-accent) 58% 71%, transparent 71.2% 100%);
  opacity: 0.95;
}

.app-header-content {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  min-height: 390px;
  padding: clamp(32px, 6vw, 78px);
}

.app-header-content > div {
  max-width: 580px;
}

.app-header h1 {
  max-width: 560px;
  margin: 0;
  color: white;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
  font-size: clamp(34px, 4.2vw, 56px);
  font-weight: 500;
  line-height: 1.02;
}

.app-header .subtitle {
  max-width: 500px;
}

.generator-layout {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr;
  gap: 26px;
  width: min(1180px, calc(100% - 48px));
  margin: 24px auto 0;
}

.generator-panel,
.preview-panel,
.card {
  border: 1px solid color-mix(in srgb, var(--color-line) 86%, white);
  border-radius: 18px;
  background: var(--color-surface);
  box-shadow: var(--shadow-panel);
}

.generator-panel {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: 16px;
  align-content: start;
  min-height: 0;
  overflow: visible;
  padding: clamp(20px, 3vw, 30px);
  background:
    linear-gradient(135deg, color-mix(in srgb, var(--color-secondary) 9%, transparent) 0 18%, transparent 18% 100%),
    linear-gradient(45deg, color-mix(in srgb, var(--color-soft-accent) 24%, transparent) 0 12%, transparent 12% 100%),
    white;
}

.field {
  display: grid;
  gap: 6px;
}

.generator-panel > .field {
  grid-column: span 6;
}

.generator-panel > .field:nth-child(1),
.generator-panel > .field:nth-child(2),
.generator-panel > .field:nth-child(3),
.generator-panel > .field:nth-child(4) {
  grid-column: span 6;
}

.generator-panel > .field:nth-child(5),
.generator-panel > .field:nth-child(6),
.generator-panel > .field:nth-child(7),
.generator-panel > .field:nth-child(9) {
  grid-column: span 12;
}

.field-grid {
  display: grid;
  grid-column: span 12;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
}

.form-actions {
  grid-column: span 12;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
}

.form-actions button {
  min-height: 50px;
}

.form-actions button[type="submit"] {
  background: var(--color-primary-dark);
  color: white;
}

.form-actions #downloadPackage {
  min-width: 180px;
  background: var(--color-accent);
  color: var(--color-charcoal-deep);
}

label {
  color: var(--color-primary-dark);
  font-size: 13px;
  font-weight: 800;
}

input,
textarea {
  width: 100%;
  min-width: 0;
  border: 1px solid color-mix(in srgb, var(--color-line) 82%, var(--color-secondary));
  border-radius: 13px;
  padding: 11px 13px;
  background: rgba(255, 255, 255, 0.9);
  color: var(--color-ink);
  font: inherit;
  line-height: 1.4;
}

textarea {
  resize: vertical;
}

.preview-panel {
  display: flex;
  flex-direction: column;
  min-width: 0;
  min-height: 760px;
  max-height: none;
  overflow: hidden;
  border-color: color-mix(in srgb, var(--color-primary) 24%, var(--color-line));
}

.preview-toolbar {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(300px, 460px);
  gap: 18px;
  align-items: start;
  padding: clamp(18px, 3vw, 26px);
  border-bottom: 1px solid color-mix(in srgb, var(--color-line) 86%, white);
  background:
    linear-gradient(100deg, white 0 62%, color-mix(in srgb, var(--color-secondary) 12%, white) 62% 100%),
    white;
}

#statusMessage {
  min-height: 24px;
  margin: 0;
  color: var(--color-muted);
  font-size: 15px;
}

.summary-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  margin: 0;
}

.summary-grid div {
  min-height: 72px;
  padding: 10px;
  border: 1px solid color-mix(in srgb, var(--color-line) 80%, white);
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.84);
}

.summary-grid dt {
  margin: 0 0 4px;
  color: var(--color-muted);
  font-size: 12px;
  font-weight: 800;
  text-transform: uppercase;
}

.summary-grid dd {
  margin: 0;
  color: var(--color-primary-dark);
  font-size: 17px;
  font-weight: 800;
}

.course-preview {
  display: grid;
  gap: 16px;
  flex: 1;
  min-height: 0;
  overflow: auto;
  padding: 18px;
  background:
    linear-gradient(135deg, color-mix(in srgb, var(--course-theme-primary, #1d1f26) 8%, transparent) 0 18%, transparent 18% 100%),
    linear-gradient(45deg, color-mix(in srgb, var(--color-accent) 20%, transparent) 0 10%, transparent 10% 100%),
    var(--course-theme-background, transparent);
}

.preview-header {
  padding: 22px;
  border-left: 6px solid var(--course-theme-primary, var(--color-primary));
  border-radius: 16px;
  background:
    linear-gradient(135deg, color-mix(in srgb, var(--course-theme-accent, #f7ce46) 22%, transparent), transparent 56%),
    var(--course-theme-surface, #fff8d8);
  color: var(--course-theme-text, var(--color-ink));
}

.preview-header h2 {
  color: var(--course-theme-primary, var(--color-primary-dark));
}

.preview-header p {
  margin: 0;
  color: color-mix(in srgb, var(--course-theme-text, #1d1f26) 74%, white);
}

.preview-slide {
  position: relative;
  padding: 20px;
  border: 1px solid color-mix(in srgb, var(--color-line) 80%, white);
  border-top: 4px solid var(--course-theme-primary, var(--color-primary));
  border-radius: 16px;
  background: var(--course-theme-surface, white);
  color: var(--course-theme-text, var(--color-ink));
}

.preview-grid,
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 14px;
  margin-top: 20px;
}

.preview-grid section,
.tile {
  min-height: 116px;
  padding: 16px;
  border: 1px solid color-mix(in srgb, var(--course-theme-primary, var(--color-line)) 22%, var(--color-line));
  border-top: 4px solid var(--course-theme-accent, var(--color-accent));
  border-radius: 14px;
  background: color-mix(in srgb, var(--course-theme-surface, #fff8d8) 92%, var(--course-theme-accent, var(--color-accent)));
}

.preview-grid strong,
.tile strong {
  display: block;
  margin-bottom: 8px;
  color: var(--course-theme-primary, var(--color-primary-dark));
  font-size: 17px;
}

.preview-grid span,
.tile span {
  display: block;
  color: color-mix(in srgb, var(--course-theme-text, #343845) 86%, var(--course-theme-surface, white));
  font-size: 16px;
  line-height: 1.5;
}

.preview-slide p,
.preview-slide li,
.preview-question li,
.course-runtime .card p,
.course-runtime .card li {
  color: color-mix(in srgb, var(--course-theme-text, #343845) 88%, var(--course-theme-surface, white));
}

.preview-callout,
.checkpoint {
  margin-top: 18px;
  padding: 15px 16px;
  border-left: 5px solid var(--course-theme-primary, var(--color-primary));
  border-radius: 14px;
  background: color-mix(in srgb, var(--course-theme-accent, var(--color-accent)) 20%, white);
  color: var(--course-theme-text, #3b2a37);
  font-size: 16px;
  line-height: 1.5;
}

.preview-question {
  margin-top: 14px;
  padding: 14px;
  border: 1px solid color-mix(in srgb, var(--course-theme-primary, var(--color-line)) 20%, var(--color-line));
  border-radius: 14px;
  background: color-mix(in srgb, var(--course-theme-surface, #f7f4fb) 94%, white);
}

.course-preview[data-theme-motif="maze"] {
  background:
    radial-gradient(circle at 18px 18px, var(--course-theme-accent, #f7ce46) 0 4px, transparent 5px) 0 0 / 42px 42px,
    linear-gradient(90deg, color-mix(in srgb, var(--course-theme-primary, #4a8ad4) 28%, transparent) 1px, transparent 1px) 0 0 / 84px 84px,
    linear-gradient(0deg, color-mix(in srgb, var(--course-theme-primary, #4a8ad4) 28%, transparent) 1px, transparent 1px) 0 0 / 84px 84px,
    var(--course-theme-background, #1d1f26);
}

.course-preview[data-theme-motif="orbit"] {
  background:
    radial-gradient(circle at 20% 22%, var(--course-theme-accent, #4a8ad4) 0 5px, transparent 6px),
    radial-gradient(circle at 72% 34%, color-mix(in srgb, var(--course-theme-primary, #1d1f26) 28%, transparent) 0 90px, transparent 92px),
    radial-gradient(circle at 70% 34%, transparent 0 118px, color-mix(in srgb, var(--course-theme-accent, #4a8ad4) 32%, transparent) 119px 121px, transparent 122px),
    var(--course-theme-background, #f2f7fb);
}

.course-preview[data-theme-motif="wave"] {
  background:
    radial-gradient(ellipse at 20% -10%, color-mix(in srgb, var(--course-theme-accent, #4a8ad4) 28%, transparent) 0 36%, transparent 38%),
    radial-gradient(ellipse at 80% 0%, color-mix(in srgb, var(--course-theme-primary, #4a8ad4) 18%, transparent) 0 32%, transparent 34%),
    var(--course-theme-background, #f3fbfa);
}

.course-preview[data-theme-motif="circuit"] {
  background:
    linear-gradient(90deg, color-mix(in srgb, var(--course-theme-accent, #4a8ad4) 26%, transparent) 1px, transparent 1px) 0 0 / 46px 46px,
    linear-gradient(0deg, color-mix(in srgb, var(--course-theme-accent, #4a8ad4) 16%, transparent) 1px, transparent 1px) 0 0 / 46px 46px,
    var(--course-theme-background, #f3fbfa);
}

.course-preview[data-theme-motif="organic"] {
  background:
    radial-gradient(ellipse at 14% 18%, color-mix(in srgb, var(--course-theme-accent, #4a8ad4) 30%, transparent) 0 90px, transparent 92px),
    radial-gradient(ellipse at 86% 8%, color-mix(in srgb, var(--course-theme-primary, #ea3323) 16%, transparent) 0 120px, transparent 122px),
    var(--course-theme-background, #fbf7fb);
}

.course-preview[data-theme-motif="scoreboard"] {
  background:
    repeating-linear-gradient(90deg, color-mix(in srgb, var(--course-theme-primary, #1d1f26) 12%, transparent) 0 12px, transparent 12px 34px),
    var(--course-theme-background, #f7f4fb);
}

.course-preview[data-theme-motif="crest"],
.course-preview[data-theme-motif="ledger"],
.course-preview[data-theme-motif="editorial"],
.course-preview[data-theme-motif="diagonal"],
.course-preview[data-theme-motif="quest"],
.course-preview[data-theme-motif="playful"] {
  background:
    linear-gradient(135deg, color-mix(in srgb, var(--course-theme-primary, #1d1f26) 12%, transparent) 0 22%, transparent 22% 100%),
    linear-gradient(45deg, color-mix(in srgb, var(--course-theme-accent, #f7ce46) 18%, transparent) 0 14%, transparent 14% 100%),
    var(--course-theme-background, #f7f4fb);
}

.preview-slide[data-motif="maze"] {
  border-color: color-mix(in srgb, var(--course-theme-primary, #4a8ad4) 55%, black);
  box-shadow: inset 0 0 0 1px color-mix(in srgb, var(--course-theme-accent, #f7ce46) 18%, transparent);
}

.shell {
  width: min(1040px, 94vw);
  margin: 28px auto;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 220px;
  gap: 24px;
  align-items: end;
  margin-bottom: 18px;
  padding: 8px 0;
}

.card {
  min-height: 440px;
  padding: 34px;
}

.question {
  margin: 0 0 24px;
  padding: 0 0 18px;
  border: 0;
  border-bottom: 1px solid #d8e2ef;
}

.question legend {
  margin-bottom: 10px;
  color: var(--color-ink);
  font-size: 18px;
  font-weight: 800;
  line-height: 1.4;
}

.question label {
  display: block;
  width: 100%;
  margin: 8px 0;
  padding: 12px 14px;
  border: 1px solid var(--color-line);
  border-radius: 8px;
  color: #343845;
  font-size: 17px;
  line-height: 1.4;
  cursor: pointer;
}

.question input {
  width: auto;
  accent-color: var(--color-accent);
}

.controls {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  margin-top: 18px;
}

#prevBtn {
  border: 1px solid var(--color-line);
  background: white;
  color: var(--color-primary-dark);
}

.progress-wrap {
  min-width: 0;
  color: var(--color-muted);
  font-weight: 800;
  text-align: right;
}

#courseStatus {
  display: block;
  margin-bottom: 4px;
  color: var(--color-primary-dark);
  font-size: 13px;
}

#progressLabel {
  font-size: 18px;
}

.progress {
  height: 10px;
  margin-top: 8px;
  overflow: hidden;
  border-radius: 999px;
  background: #d8e2ef;
}

#progressBar {
  width: 0%;
  height: 100%;
  background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
  transition: width 0.25s ease;
}

.course-runtime {
  background:
    linear-gradient(135deg, color-mix(in srgb, var(--course-theme-primary, #1d1f26) 18%, transparent) 0 22%, transparent 22% 100%),
    linear-gradient(180deg, var(--course-theme-background, var(--color-page)), var(--color-page));
}

.course-runtime .hero {
  padding: 24px;
  border-radius: 8px;
  background:
    linear-gradient(135deg, var(--course-theme-primary, var(--color-primary-dark)), color-mix(in srgb, var(--course-theme-primary, var(--color-primary-dark)) 70%, black)),
    var(--course-theme-primary, var(--color-primary-dark));
  color: white;
  box-shadow: var(--shadow-panel);
}

.course-runtime .hero h1,
.course-runtime .hero .eyebrow,
.course-runtime .hero .subtitle,
.course-runtime .hero #courseStatus,
.course-runtime .hero #progressLabel {
  color: white;
}

.course-runtime .progress {
  background: rgba(255, 255, 255, 0.26);
}

.course-runtime #progressBar {
  background: linear-gradient(90deg, var(--course-theme-accent, var(--color-accent)), white);
}

.course-runtime .card {
  border-top: 5px solid var(--course-theme-primary, var(--color-primary));
  background: var(--course-theme-surface, white);
}

.course-runtime[data-theme-motif="maze"] .card {
  border-color: color-mix(in srgb, var(--course-theme-primary, #4a8ad4) 65%, black);
  box-shadow:
    inset 0 0 0 1px color-mix(in srgb, var(--course-theme-accent, #f7ce46) 18%, transparent),
    var(--shadow-panel);
}

.course-runtime h2,
.course-runtime .tile strong,
.course-runtime .result {
  color: var(--course-theme-primary, var(--color-primary-dark));
}

.course-runtime li::marker {
  color: var(--course-theme-accent, var(--color-accent));
}

.result {
  color: var(--color-primary-dark);
  font-size: 24px;
  font-weight: 900;
}

@media (max-width: 1040px) {
  .app-header,
  .generator-layout,
  .preview-toolbar {
    grid-template-columns: 1fr;
  }

  .app-header {
    min-height: auto;
  }

  .generator-layout {
    min-height: 0;
    margin-top: 20px;
  }

  .generator-panel {
    position: static;
    min-height: auto;
    max-height: none;
  }

  .generator-panel > .field,
  .generator-panel > .field:nth-child(n) {
    grid-column: span 12;
  }

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

  .preview-panel {
    min-height: 680px;
    max-height: none;
  }
}

@media (max-width: 720px) {
  .shell {
    width: min(100% - 24px, 680px);
    margin: 16px auto;
  }

  .app-header {
    align-items: stretch;
    padding: 0;
    width: min(100% - 24px, 680px);
    border-radius: 24px;
    background:
      linear-gradient(146deg, var(--color-charcoal) 0 78%, transparent 78.4% 100%),
      linear-gradient(28deg, transparent 0 50%, color-mix(in srgb, var(--color-secondary) 44%, transparent) 50% 64%, transparent 64% 100%),
      linear-gradient(150deg, transparent 0 68%, color-mix(in srgb, var(--color-danger) 68%, transparent) 68% 77%, color-mix(in srgb, var(--color-accent) 76%, transparent) 77% 84%, transparent 84% 100%),
      var(--color-cream);
  }

  .app-header::before {
    content: none;
  }

  .app-header-content {
    padding: 28px 22px;
    min-height: 330px;
  }

  .app-header h1 {
    max-width: 290px;
    font-size: 36px;
  }

  .app-header .subtitle {
    max-width: 290px;
  }

  .generator-layout {
    width: min(100% - 24px, 680px);
  }

  .generator-panel {
    grid-template-columns: 1fr;
  }

  .generator-panel > .field,
  .generator-panel > .field:nth-child(n),
  .field-grid,
  .form-actions {
    grid-column: 1;
  }

  .form-actions button {
    flex: 1 1 180px;
  }

  .field-grid,
  .summary-grid,
  .hero {
    grid-template-columns: 1fr;
  }

  .progress-wrap {
    text-align: left;
  }

  .card {
    min-height: 420px;
    padding: 24px;
  }

  h2 {
    font-size: 26px;
  }

  p,
  li {
    font-size: 16px;
  }

  .controls {
    position: sticky;
    bottom: 0;
    padding: 12px 0;
    background: var(--color-page);
  }
}