/* PDFree 홈페이지 (5-5). 밖에서 아무것도 불러오지 않는다: 글꼴은 PC에 있는 것, 그림은 이 서버 것만.
   색은 앱에서 왔다: 문서를 놓는 회색 바탕(--canvas), 흰 종이, 앱의 파랑. 빨강은 도장(인주) 하나에만 쓴다. */
:root {
  --canvas: #eef2f7;
  --paper: #ffffff;
  --ink: #0f172a;
  --ink-2: #475569;
  --ink-3: #64748b;
  --line: #d6dde8;
  --blue: #2563eb;
  --blue-dark: #1d4ed8;
  --blue-soft: #e8efff;
  --seal: #c8322b;
  --sans: 'Malgun Gothic', 'Apple SD Gothic Neo', 'Noto Sans KR', system-ui, sans-serif;
  --mono: ui-monospace, 'Cascadia Mono', Consolas, 'D2Coding', monospace;
  --wrap: 1160px;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}
html {
  -webkit-text-size-adjust: 100%;
}
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.65;
  word-break: keep-all;
  overflow-wrap: anywhere;
}
img {
  max-width: 100%;
  height: auto;
  display: block;
}
a {
  color: var(--blue);
}
a:hover {
  color: var(--blue-dark);
}
:focus-visible {
  outline: 3px solid var(--blue);
  outline-offset: 2px;
  border-radius: 4px;
}
h1,
h2,
h3 {
  margin: 0;
  line-height: 1.25;
  letter-spacing: -0.02em;
}
p {
  margin: 0;
}
.wrap {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 0 24px;
}
.mono {
  font-family: var(--mono);
  font-size: 0.875em;
  letter-spacing: 0;
}
.skip {
  position: absolute;
  left: -9999px;
}
.skip:focus {
  left: 16px;
  top: 12px;
  background: var(--paper);
  padding: 8px 12px;
  z-index: 10;
}

/* 머리줄 */
.site-header {
  background: var(--paper);
  border-bottom: 1px solid var(--line);
}
.site-header .wrap {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 28px;
  min-height: 64px;
  padding-top: 10px;
  padding-bottom: 10px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--ink);
  text-decoration: none;
  font-weight: 700;
  font-size: 19px;
  letter-spacing: -0.01em;
}
.brand img {
  width: 30px;
  height: 30px;
  border-radius: 7px;
}
.nav {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 22px;
  margin-left: auto;
  align-items: center;
  font-size: 15px;
}
.nav a {
  color: var(--ink-2);
  text-decoration: none;
}
.nav a:hover {
  color: var(--ink);
}
/* 메뉴 글자색(.nav a)이 단추 글자색을 덮지 않게 */
.nav .btn-primary,
.nav .btn-primary:hover {
  color: #fff;
}

/* 단추 */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 13px 22px;
  border-radius: 10px;
  font-weight: 700;
  font-size: 16px;
  text-decoration: none;
  line-height: 1.2;
}
.btn-primary {
  background: var(--blue);
  color: #fff;
}
.btn-primary:hover {
  background: var(--blue-dark);
  color: #fff;
}
.btn-quiet {
  color: var(--ink);
  background: var(--paper);
  border: 1px solid var(--line);
}
.btn-quiet:hover {
  border-color: var(--ink-3);
  color: var(--ink);
}
.btn-small {
  padding: 8px 14px;
  font-size: 14px;
  border-radius: 8px;
}
.pending {
  display: inline-block;
  padding: 13px 22px;
  border-radius: 10px;
  border: 1px dashed var(--ink-3);
  color: var(--ink-2);
  font-weight: 700;
}

/* 첫 화면: 앱에서 문서를 놓는 회색 바탕 위에 */
.hero {
  background: var(--canvas);
  border-bottom: 1px solid var(--line);
  overflow: hidden;
}
.hero .wrap {
  display: grid;
  grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
  gap: 48px;
  align-items: center;
  padding-top: 72px;
  padding-bottom: 80px;
}
.hero h1 {
  font-size: clamp(34px, 4.6vw, 56px);
  font-weight: 700;
  letter-spacing: -0.035em;
  line-height: 1.18;
}
.hero h1 em {
  font-style: normal;
  color: var(--blue);
}
.lead {
  margin-top: 22px;
  font-size: 18px;
  color: var(--ink-2);
  max-width: 34em;
}
.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
  margin-top: 32px;
}
.release-meta {
  margin-top: 12px;
  color: var(--ink-3);
}
.facts {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 18px;
  margin: 28px 0 0;
  padding: 0;
  list-style: none;
  color: var(--ink-2);
  font-size: 15px;
}
.facts li::before {
  content: '';
  display: inline-block;
  width: 6px;
  height: 6px;
  margin: 0 8px 2px 0;
  border-radius: 50%;
  background: var(--blue);
}

/* 앱 화면 + 도장 (이 페이지의 하나뿐인 장식) */
.shot {
  position: relative;
  margin: 0;
}
.shot img {
  border-radius: 12px;
  border: 1px solid var(--line);
  box-shadow: 0 1px 2px rgb(15 23 42 / 6%), 0 18px 48px rgb(15 23 42 / 14%);
  background: var(--paper);
}
.shot figcaption {
  margin-top: 12px;
  font-size: 14px;
  color: var(--ink-3);
}
.seal {
  position: absolute;
  left: -34px;
  bottom: 34px;
  width: 132px;
  height: 132px;
  border-radius: 50%;
  border: 4px solid var(--seal);
  box-shadow: inset 0 0 0 3px var(--paper), inset 0 0 0 5px var(--seal);
  color: var(--seal);
  display: grid;
  place-content: center;
  text-align: center;
  font-weight: 700;
  font-size: 19px;
  line-height: 1.25;
  letter-spacing: 0.06em;
  transform: rotate(-12deg);
  background: rgb(255 255 255 / 55%);
  /* 인주가 고르지 않게 묻은 느낌: 군데군데 옅게 */
  -webkit-mask-image: radial-gradient(circle at 30% 70%, #000 55%, rgb(0 0 0 / 72%) 75%, #000 90%);
  mask-image: radial-gradient(circle at 30% 70%, #000 55%, rgb(0 0 0 / 72%) 75%, #000 90%);
  animation: stamp 0.42s cubic-bezier(0.2, 0.9, 0.3, 1.25) 0.5s both;
}
.seal small {
  display: block;
  font-size: 11px;
  letter-spacing: 0.2em;
  margin-top: 4px;
}
@keyframes stamp {
  from {
    opacity: 0;
    transform: rotate(-12deg) scale(1.7);
  }
  to {
    opacity: 1;
    transform: rotate(-12deg) scale(1);
  }
}
@media (prefers-reduced-motion: reduce) {
  .seal {
    animation: none;
  }
}

/* 칸 공통 */
.section {
  padding: 88px 0;
}
.section-canvas {
  background: var(--canvas);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.section-title {
  font-size: clamp(26px, 3vw, 36px);
  font-weight: 700;
}
.section-lead {
  margin-top: 14px;
  color: var(--ink-2);
  font-size: 17px;
  max-width: 40em;
}

/* 기능: 하는 일별로 묶음 */
.features {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0;
  margin-top: 44px;
  border-top: 1px solid var(--line);
}
.feature {
  padding: 28px 28px 32px 0;
  border-bottom: 1px solid var(--line);
}
.feature h3 {
  font-size: 20px;
}
.feature p {
  margin-top: 10px;
  color: var(--ink-2);
}
.tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: 16px 0 0;
  padding: 0;
  list-style: none;
}
.tags li {
  font-size: 13px;
  padding: 3px 10px;
  border-radius: 999px;
  background: var(--canvas);
  color: var(--ink-2);
}
.also {
  margin-top: 28px;
  color: var(--ink-2);
}

/* 파일은 어디로도 */
.promises {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
  margin-top: 40px;
}
.promise {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 26px 28px;
}
.promise h3 {
  font-size: 19px;
}
.promise p {
  margin-top: 8px;
  color: var(--ink-2);
}

/* 자주 묻는 질문 */
.faq {
  margin-top: 36px;
  border-top: 1px solid var(--line);
  max-width: 820px;
}
.faq details {
  border-bottom: 1px solid var(--line);
}
.faq summary {
  cursor: pointer;
  list-style: none;
  padding: 20px 36px 20px 0;
  font-weight: 700;
  font-size: 17px;
  position: relative;
}
.faq summary::-webkit-details-marker {
  display: none;
}
.faq summary::after {
  content: '+';
  position: absolute;
  right: 6px;
  top: 16px;
  font-size: 24px;
  font-weight: 400;
  color: var(--ink-3);
}
.faq details[open] summary::after {
  content: '−';
}
.faq details p {
  padding: 0 0 22px;
  color: var(--ink-2);
  max-width: 44em;
}

/* 끝 권유 */
.closing {
  text-align: center;
}
.closing .actions {
  justify-content: center;
}

/* 다운로드 페이지 */
.page-head {
  background: var(--canvas);
  border-bottom: 1px solid var(--line);
  padding: 56px 0 48px;
}
.page-head h1 {
  font-size: clamp(30px, 4vw, 44px);
}
.page-head .lead {
  margin-top: 14px;
}
.installers {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
}
.installer {
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 28px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  align-items: flex-start;
}
.installer.recommended {
  border-color: var(--blue);
  box-shadow: 0 0 0 1px var(--blue);
}
.installer h2 {
  font-size: 21px;
}
.installer p {
  color: var(--ink-2);
}
.installer .btn {
  margin-top: 8px;
}
.badge {
  font-size: 12px;
  font-weight: 700;
  color: var(--blue-dark);
  background: var(--blue-soft);
  padding: 3px 10px;
  border-radius: 999px;
}
.note {
  margin-top: 24px;
  padding: 16px 20px;
  border-left: 4px solid var(--blue);
  background: var(--blue-soft);
  border-radius: 0 8px 8px 0;
  color: var(--ink);
}
.steps {
  margin: 20px 0 0;
  padding-left: 1.4em;
  display: grid;
  gap: 12px;
  max-width: 44em;
}
.steps li::marker {
  font-weight: 700;
  color: var(--blue);
}
.needs {
  margin: 20px 0 0;
  padding-left: 1.2em;
  display: grid;
  gap: 10px;
  color: var(--ink-2);
  max-width: 44em;
}
.block + .block {
  margin-top: 56px;
}
.block h2 {
  font-size: 24px;
}

/* 업데이트 내역 */
.release {
  display: grid;
  grid-template-columns: 200px minmax(0, 1fr);
  gap: 8px 40px;
  padding: 32px 0;
  border-top: 1px solid var(--line);
}
.release:last-child {
  border-bottom: 1px solid var(--line);
}
.release-head {
  display: flex;
  flex-direction: column;
  gap: 4px;
  align-items: flex-start;
}
.release-head h2 {
  font-size: 24px;
  font-family: var(--mono);
  letter-spacing: 0;
}
.release-date {
  font-family: var(--mono);
  font-size: 14px;
  color: var(--ink-3);
}
.tag {
  font-size: 12px;
  font-weight: 700;
  color: var(--blue-dark);
  background: var(--blue-soft);
  padding: 2px 10px;
  border-radius: 999px;
}
.release ul {
  margin: 0;
  padding-left: 1.2em;
  display: grid;
  gap: 8px;
  color: var(--ink-2);
}
.empty {
  color: var(--ink-2);
}

/* 글 페이지 (개인정보 안내) */
.prose {
  max-width: 760px;
}
.prose h2 {
  font-size: 22px;
  margin-top: 44px;
}
.prose p,
.prose ul {
  margin-top: 12px;
  color: var(--ink-2);
}
.prose ul {
  padding-left: 1.2em;
  display: grid;
  gap: 8px;
}
.prose strong {
  color: var(--ink);
}

/* 바닥줄 */
.site-footer {
  border-top: 1px solid var(--line);
  padding: 36px 0 44px;
  color: var(--ink-3);
  font-size: 14px;
}
.site-footer .wrap {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 32px;
  justify-content: space-between;
}
.site-footer nav {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 20px;
}
.site-footer a {
  color: var(--ink-2);
}

@media (max-width: 900px) {
  .hero .wrap {
    grid-template-columns: minmax(0, 1fr);
    padding-top: 48px;
    padding-bottom: 56px;
  }
  .seal {
    left: auto;
    right: -10px;
    bottom: -28px;
    width: 104px;
    height: 104px;
    font-size: 15px;
  }
  .features {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}
@media (max-width: 640px) {
  .wrap {
    padding: 0 16px;
  }
  .nav {
    margin-left: 0;
    width: 100%;
    gap: 4px 16px;
  }
  .section {
    padding: 64px 0;
  }
  .features,
  .promises,
  .installers {
    grid-template-columns: minmax(0, 1fr);
  }
  .feature {
    padding-right: 0;
  }
  .release {
    grid-template-columns: minmax(0, 1fr);
  }
}