/* Existing DESIGN.md palette, still provisional. No global landing styles. */
:root {
  --color-bg-base: #faf4ec;
  --color-bg-surface: #fff;
  --color-bg-nude: #f3e8d9;
  --color-action: #ff7a00;
  --color-action-hover: #e06b00;
  --color-text-primary: #2b1d10;
  --color-border: #e9dbc8;
}
* {
  box-sizing: border-box;
}
body {
  margin: 0;
  background: var(--color-bg-base);
  color: var(--color-text-primary);
  font:
    16px/1.75 "IBM Plex Sans KR",
    system-ui,
    sans-serif;
}
a {
  color: inherit;
  text-underline-offset: 4px;
}
button,
input,
textarea,
select {
  font: inherit;
}
button,
a,
input,
select,
textarea {
  -webkit-tap-highlight-color: transparent;
}
:focus-visible {
  outline: 3px solid var(--color-text-primary);
  outline-offset: 4px;
}
[hidden] {
  display: none !important;
}
.site-head {
  max-width: 1100px;
  margin: auto;
  padding: 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  border-bottom: 1px solid var(--color-border);
}
.brand {
  font-family: "Space Grotesk", sans-serif;
  font-size: 20px;
  font-weight: 700;
  text-decoration: none;
  letter-spacing: -0.5px;
}
.nav {
  display: flex;
  gap: 20px;
  align-items: center;
  font-size: 14px;
}
.nav a {
  min-height: 44px;
  display: flex;
  align-items: center;
}
.shell {
  max-width: 1000px;
  margin: auto;
  padding: 48px 24px 80px;
}
.eyebrow {
  font-family: "Space Grotesk", sans-serif;
  font-size: 14px;
  letter-spacing: 2px;
  margin: 0 0 12px;
}
h1 {
  font-size: 48px;
  line-height: 1.25;
  letter-spacing: -2px;
  margin: 0 0 24px;
  max-width: 800px;
}
h2 {
  font-size: 24px;
  line-height: 1.45;
  letter-spacing: -0.7px;
  margin: 0 0 20px;
}
h3 {
  font-size: 20px;
  line-height: 1.5;
  margin: 0 0 10px;
}
p {
  margin: 0 0 16px;
}
.intro {
  max-width: 660px;
  margin-bottom: 40px;
}
.muted {
  opacity: 0.78;
}
.tabs {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin: 28px 0;
}
.tabs a {
  padding: 8px 18px;
  text-decoration: none;
  border: 1px solid var(--color-border);
  border-radius: 30px;
}
.tabs a.active {
  background: var(--color-text-primary);
  color: var(--color-bg-base);
}
.grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 32px;
}
.course-card {
  border-bottom: 1px solid var(--color-border);
  padding-bottom: 24px;
  text-decoration: none;
  display: block;
}
.poster {
  height: 200px;
  background: var(--color-bg-nude);
  padding: 28px;
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  position: relative;
  overflow: hidden;
  margin-bottom: 22px;
  border-radius: 12px;
}
.poster .play-icon {
  font-size: 48px;
  line-height: 1;
  color: var(--color-action);
}
.poster strong {
  font:
    700 48px/1 "Space Grotesk",
    sans-serif;
  letter-spacing: -3px;
}
.meta {
  display: flex;
  gap: 12px;
  align-items: center;
  flex-wrap: wrap;
  font-size: 14px;
  margin: 12px 0;
}
.tag {
  border: 1px solid var(--color-border);
  border-radius: 24px;
  padding: 3px 12px;
  font-size: 14px;
}
.tag.free {
  background: var(--color-action);
  border-color: var(--color-action);
}
.price {
  font-weight: 700;
  font-size: 20px;
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 12px 22px;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  text-decoration: none;
  background: transparent;
  color: inherit;
  cursor: pointer;
  font-weight: 600;
  gap: 8px;
}
.btn.primary {
  background: var(--color-action);
  border-color: var(--color-action);
}
.btn.primary:hover {
  background: var(--color-action-hover);
}
.btn:disabled {
  opacity: 0.5;
  cursor: wait;
}
.actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  align-items: center;
}
.section {
  margin-top: 48px;
  padding-top: 32px;
  border-top: 1px solid var(--color-border);
}
.prose {
  white-space: pre-line;
  overflow-wrap: anywhere;
}
.detail-grid {
  display: grid;
  grid-template-columns: 1.45fr 1fr;
  gap: 40px;
}
.purchase-box {
  padding: 24px;
  background: var(--color-bg-surface);
  border: 1px solid var(--color-border);
  border-radius: 12px;
  align-self: start;
}
.purchase-box .btn {
  width: 100%;
}
.lesson-list {
  padding: 0;
  list-style: none;
}
.lesson-list li {
  display: flex;
  gap: 16px;
  justify-content: space-between;
  padding: 18px 0;
  border-bottom: 1px solid var(--color-border);
}
.notice {
  padding: 16px 20px;
  background: var(--color-bg-nude);
  border-radius: 8px;
  overflow-wrap: anywhere;
  margin: 20px 0;
}
.notice:empty {
  display: none;
}
.empty {
  padding: 48px 0;
}
.player {
  width: 100%;
  aspect-ratio: 16/9;
  background: var(--color-text-primary);
  border: 0;
  border-radius: 8px;
}
.viewer-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 260px;
  gap: 24px;
}
.lesson-choice {
  width: 100%;
  text-align: left;
  margin-bottom: 10px;
}
.lesson-choice.active {
  background: var(--color-bg-nude);
  border-color: var(--color-action);
}
.admin-form {
  display: grid;
  gap: 16px;
  max-width: 720px;
}
label {
  display: grid;
  gap: 6px;
  font-size: 14px;
  font-weight: 600;
}
input,
select,
textarea {
  padding: 12px;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  background: var(--color-bg-surface);
  color: inherit;
  width: 100%;
  min-width: 0;
}
textarea {
  resize: vertical;
  min-height: 110px;
}
.check {
  display: flex;
  gap: 10px;
  align-items: center;
}
.check input {
  width: 20px;
  height: 20px;
}
.row {
  display: flex;
  gap: 16px;
  align-items: end;
}
.row > * {
  flex: 1;
  min-width: 0;
}
progress {
  width: 100%;
  accent-color: var(--color-action);
}
.order-row {
  border-bottom: 1px solid var(--color-border);
  padding: 20px 0;
}
.site-foot {
  max-width: 1000px;
  margin: auto;
  padding: 24px;
  font-size: 14px;
  border-top: 1px solid var(--color-border);
}
.site-foot a {
  margin-right: 16px;
}
.hero-mark {
  display: inline-block;
  transition: transform 0.25s ease;
}
.hero-mark:hover {
  transform: rotate(-5deg);
}
@media (max-width: 720px) {
  h1 {
    font-size: 32px;
    letter-spacing: -1px;
  }
  .shell {
    padding-top: 36px;
  }
  .site-head {
    padding: 16px 24px;
    align-items: flex-start;
  }
  .brand {
    font-size: 16px;
  }
  .nav {
    gap: 12px;
    font-size: 14px;
  }
  .grid,
  .detail-grid,
  .viewer-layout {
    grid-template-columns: 1fr;
  }
  .poster {
    height: 180px;
  }
  .row {
    flex-direction: column;
    align-items: stretch;
  }
  .purchase-box {
    order: -1;
  }
  .section {
    margin-top: 36px;
  }
  .nav a:first-child {
    display: none;
  }
}
@media (prefers-reduced-motion: reduce) {
  .hero-mark {
    transition: none;
  }
}

h1,
h2,
h3 {
  word-break: keep-all;
  overflow-wrap: anywhere;
}
.material-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-block: 16px;
}
.material-actions .btn {
  min-height: 44px;
  text-align: left;
}
.material-actions .btn:disabled {
  cursor: wait;
  opacity: 0.5;
}