:root {
  color-scheme: light;
  --paper: #fffaf4;
  --paper-violet: #f6f0ff;
  --surface: #ffffff;
  --ink: #2b2540;
  --ink-muted: #6b6580;
  --violet: #7c5cff;
  --violet-deep: #5b3fe0;
  --coral: #ff7a59;
  --success: #22a77a;
  --line: #ece4f5;
  --shadow: 0 14px 36px rgba(91, 63, 224, 0.11);
  --radius: 20px;
  font-family: "Nunito", "Segoe UI", Arial, sans-serif;
  font-synthesis: none;
}

* {
  box-sizing: border-box;
}

html {
  min-width: 320px;
  background: var(--paper);
  color: var(--ink);
}

body {
  min-width: 320px;
  max-width: 760px;
  min-height: 100vh;
  margin: 0 auto;
  padding-top: max(18px, env(safe-area-inset-top));
  padding-right: max(16px, env(safe-area-inset-right));
  padding-bottom: max(28px, env(safe-area-inset-bottom));
  padding-left: max(16px, env(safe-area-inset-left));
  background: var(--paper);
  font-size: 16px;
  line-height: 1.55;
}

button,
a,
summary {
  -webkit-tap-highlight-color: transparent;
}

button,
.button,
summary,
a {
  min-height: 44px;
}

button,
.button {
  border: 0;
  font: inherit;
  font-weight: 800;
  cursor: pointer;
}

button:focus-visible,
a:focus-visible,
summary:focus-visible {
  outline: 3px solid var(--coral);
  outline-offset: 3px;
}

.hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  padding: 34px 24px 30px 36px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background:
    linear-gradient(90deg, transparent 0 22px, rgba(255, 122, 89, 0.42) 22px 24px, transparent 24px),
    repeating-linear-gradient(180deg, var(--surface) 0 35px, rgba(124, 92, 255, 0.12) 35px 36px);
  box-shadow: var(--shadow);
}

.hero__copy {
  position: relative;
  z-index: 1;
  max-width: 610px;
}

.hero__note {
  max-width: 34ch;
  margin: 0 0 12px;
  color: var(--violet-deep);
  font-size: 0.9rem;
  font-weight: 800;
}

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

h1 {
  max-width: 17ch;
  margin: 0;
  font-size: clamp(2rem, 8.5vw, 3.4rem);
  line-height: 1.02;
  letter-spacing: -0.035em;
}

.hero__lead {
  max-width: 54ch;
  margin: 20px 0 0;
  color: var(--ink-muted);
  font-size: 1.05rem;
}

.pencil-mark {
  position: absolute;
  right: -10px;
  bottom: 27px;
  width: 98px;
  height: 9px;
  border-radius: 999px;
  background: var(--coral);
  transform: rotate(-7deg);
  opacity: 0.86;
}

main {
  display: grid;
  gap: 28px;
  padding: 34px 0 26px;
}

.catalog,
.faq {
  min-width: 0;
}

.section-heading {
  margin-bottom: 18px;
}

.section-heading h2 {
  margin: 0 0 6px;
  font-size: clamp(1.45rem, 6vw, 2rem);
  line-height: 1.15;
  letter-spacing: -0.02em;
}

.section-heading p {
  max-width: 58ch;
  margin: 0;
  color: var(--ink-muted);
}

.state-panel {
  padding: 20px;
  border: 1px dashed var(--violet);
  border-radius: 18px;
  background: var(--paper-violet);
  color: var(--ink-muted);
}

.state-panel[hidden] {
  display: none;
}

.state-panel--error {
  border-color: var(--coral);
  background: var(--surface);
}

.state-panel--error p {
  margin-top: 0;
}

.course-list {
  display: grid;
  gap: 14px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.course-card {
  position: relative;
  overflow: hidden;
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
}

.course-card--priority {
  padding-left: 28px;
  box-shadow: var(--shadow);
}

.course-card--priority::before {
  position: absolute;
  inset: 0 auto 0 0;
  width: 7px;
  background: var(--violet);
  content: "";
}

.course-card__marker {
  margin: 0 0 8px;
  color: var(--success);
  font-size: 0.9rem;
  font-weight: 800;
}

.course-card__marker:empty {
  display: none;
}

.course-card__title {
  margin: 0 0 14px;
  font-size: 1.3rem;
  line-height: 1.2;
}

.course-card__detail {
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.course-card__detail summary,
.faq summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 2px;
  font-weight: 800;
  cursor: pointer;
  list-style: none;
}

.course-card__detail summary::after,
.faq summary::after {
  color: var(--violet);
  content: "+";
  font-size: 1.35rem;
}

.course-card__detail[open] summary::after,
.faq details[open] summary::after {
  content: "−";
}

.course-card__description {
  margin: 0;
  padding: 0 2px 16px;
  color: var(--ink-muted);
}

.course-card__actions {
  display: grid;
  gap: 10px;
  padding-top: 16px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  min-height: 48px;
  padding: 11px 18px;
  border-radius: 999px;
}

.button--primary {
  background: linear-gradient(135deg, var(--violet), var(--violet-deep));
  color: var(--surface);
  box-shadow: 0 8px 20px rgba(91, 63, 224, 0.2);
}

.button--secondary {
  border: 1px solid var(--violet);
  background: var(--surface);
  color: var(--violet-deep);
}

.action-feedback {
  min-height: 24px;
  margin: 12px 4px 0;
  color: var(--success);
  font-weight: 700;
}

.faq {
  padding: 22px;
  border-radius: var(--radius);
  background: var(--paper-violet);
}

.faq details + details {
  border-top: 1px solid var(--line);
}

.faq details p {
  margin: 0;
  padding: 0 0 16px;
  color: var(--ink-muted);
}

footer {
  padding: 22px 2px 8px;
  border-top: 1px solid var(--line);
  color: var(--ink-muted);
  font-size: 0.9rem;
}

footer nav {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 20px;
}

footer a {
  display: inline-flex;
  align-items: center;
  color: var(--violet-deep);
  font-weight: 700;
  text-underline-offset: 3px;
}

@media (min-width: 620px) {
  body {
    padding-right: 24px;
    padding-left: 24px;
  }

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

  .course-item:first-child {
    grid-column: 1 / -1;
  }

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

@media (max-width: 359px) {
  body {
    padding-right: max(12px, env(safe-area-inset-right));
    padding-left: max(12px, env(safe-area-inset-left));
    font-size: 15px;
  }

  .hero {
    padding: 28px 16px 24px 28px;
  }

  .course-card,
  .faq {
    padding: 16px;
  }
}

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