/* FlameAI 새 디자인 — 공통 레이아웃 (nav/footer/버튼/섹션/터미널)
   기준: docs/ref/새 디자인/assets/css/common.css → rem 환산 + fa- 네임스페이스.
   모든 클래스를 fa- 접두어로 분리한 이유: nav.jsp/footer.jsp는 아직 새 디자인으로
   이식하지 않은 다른 공개 페이지(contact/terms/blog 등)에서도 공용으로 include되는데,
   여기 쓰이는 .container/.btn/.btn-primary/.badge/.navbar 같은 이름이 style-cortexable.css
   (Bootstrap)의 동일 클래스명과 충돌해 그 페이지들의 레이아웃을 깨기 때문이다.
   tokens.css를 먼저 불러온 뒤 이 파일을 불러올 것. */

.fa-skip-link {
  position: fixed;
  left: 1.25rem;
  top: -4.375rem;
  z-index: 100;
  background: var(--ink);
  color: #fff;
  padding: .625rem 1.25rem;
  border-radius: var(--radius);
}
.fa-skip-link:focus {
  top: .625rem;
}

.fa-container {
  max-width: var(--container);
  margin: auto;
  padding: 0 3.5rem;
}

.fa-nowrap {
  white-space: nowrap;
}

/* ── Public page header ─────────────────────────────────── */
.fa-page-header {
  padding: 7rem 0 4rem;
  border-bottom: 1px solid var(--line);
  background: #fff;
}
.fa-page-header h1 {
  max-width: 56rem;
  margin: 0;
  font-size: clamp(3.25rem, 6.5vw, 5.75rem);
  font-weight: 850;
  letter-spacing: -.07em;
  line-height: 1.02;
}
.fa-page-header h1 + p {
  max-width: 38rem;
  margin: 1.625rem 0 0;
  color: var(--muted);
  font-size: 1.0625rem;
  line-height: 1.8;
}

/* ── Navbar ──────────────────────────────────────────────── */
.fa-navbar a {
  color: inherit;
  text-decoration: none;
}
.fa-navbar {
  position: fixed;
  left: 0;
  right: 0;
  top: 0;
  z-index: 30;
  background: transparent;
  color: #fff;
  transition: background-color .25s, color .25s, border-color .25s;
}
.fa-navbar.is-dark {
  background: #0f1012cc;
  color: #fff;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}
.fa-navbar.is-light,
.fa-navbar.is-scrolled {
  background: #ffffffed;
  color: var(--ink);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}
/* home이 아닌 페이지 — hero가 없어 처음부터 밝은 배경으로 고정 */
.fa-navbar.fa-navbar-light {
  position: sticky;
  background: #ffffffed;
  color: var(--ink);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}
.fa-nav-inner {
  min-height: 5.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.875rem;
}
.fa-brand {
  font-size: 1.5625rem;
  font-weight: 850;
  letter-spacing: -.06875rem;
  display: inline-flex;
  align-items: center;
}
.fa-brand-logo {
  display: block;
  width: 9.375rem;
  height: auto;
  filter: brightness(0) invert(1);
}
.fa-navbar.is-light .fa-brand-logo,
.fa-navbar.is-scrolled .fa-brand-logo,
.fa-navbar.fa-navbar-light .fa-brand-logo {
  filter: none;
}
.fa-nav-links {
  display: flex;
  gap: 2.25rem;
  margin-left: 5.625rem;
  align-items: center;
  font-size: .9375rem;
  font-weight: 650;
}
.fa-nav-links a:hover,
.fa-footer a:hover {
  color: var(--brand);
}
.fa-nav-links a[aria-current=page] {
  color: var(--brand);
}
.fa-nav-actions {
  display: flex;
  align-items: center;
  gap: 1.125rem;
}
.fa-console {
  display: inline-flex;
  align-items: center;
  gap: .5625rem;
  background: var(--ink);
  color: #fff;
  padding: .625rem 1.0625rem;
  font-size: .8125rem;
  font-weight: 700;
  border-radius: var(--radius);
}
.fa-navbar .fa-console {
  color: #fff;
  background: #ffffff0c;
  border: 1px solid var(--fa-dark-border);
}
.fa-navbar.is-light .fa-console,
.fa-navbar.is-scrolled .fa-console,
.fa-navbar.fa-navbar-light .fa-console {
  background: var(--ink);
  border-color: var(--ink);
}
.fa-console svg {
  width: 1rem;
  height: 1rem;
}
.fa-language {
  position: relative;
}
.fa-language summary {
  width: 2rem;
  height: 2.25rem;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  list-style: none;
  color: #c6c8d0;
}
.fa-navbar.is-light .fa-language summary,
.fa-navbar.is-scrolled .fa-language summary,
.fa-navbar.fa-navbar-light .fa-language summary {
  color: var(--muted);
}
.fa-language summary::-webkit-details-marker {
  display: none;
}
.fa-language summary svg {
  height: 1.125rem;
  width: 1.125rem;
}
.fa-language-menu {
  position: absolute;
  top: 2.75rem;
  right: 0;
  background: #fff;
  color: var(--ink);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: 0 .75rem 2.5rem #0001;
  padding: .5rem;
  width: 9.0625rem;
}
.fa-language-menu button {
  border: 0;
  background: transparent;
  text-align: left;
  width: 100%;
  padding: .5rem;
  font-size: .875rem;
  border-radius: .3125rem;
  color: inherit;
}
.fa-language-menu button[aria-pressed=true] {
  background: var(--brand-soft);
  color: var(--brand);
}

/* ── 버튼/섹션 공통 ──────────────────────────────────────── */
.fa-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 1.25rem;
  font-size: .9375rem;
  font-weight: 750;
  border-radius: var(--radius);
  padding: .9375rem 1.3125rem;
  border: 1px solid var(--line);
  background: #fff;
  color: var(--ink);
  text-decoration: none;
  transition: background .2s, transform .2s;
}
.fa-btn:hover {
  transform: translateY(-2px);
  background: #f2f2f4;
}
.fa-btn-primary {
  color: #fff;
  background: var(--brand);
  border-color: var(--brand);
  box-shadow: 0 8px 22px #e7483018;
}
.fa-btn-primary:hover {
  background: var(--brand-hover);
}
.fa-btn:disabled {
  opacity: .4;
  cursor: not-allowed;
  transform: none;
}
.fa-section {
  padding: 6.5625rem 0;
}
.fa-section-title {
  font-size: clamp(2.125rem, 3.9vw, 3.625rem);
  line-height: 1.17;
  letter-spacing: -.055em;
  font-weight: 850;
  margin: 1.4375rem 0;
  color: var(--ink);
}
.fa-section-title span {
  color: var(--brand);
}
.fa-section-intro {
  font-size: 1.0625rem;
  color: var(--muted);
  margin: 0;
}
.fa-center {
  text-align: center;
}
.fa-detail-link {
  display: inline-flex;
  gap: 1rem;
  align-items: center;
  margin-top: 1.875rem;
  padding-bottom: .3125rem;
  border-bottom: 1px solid #b8b8bf;
  font-size: .9375rem;
  font-weight: 700;
  color: var(--ink);
  text-decoration: none;
}
.fa-detail-link:hover {
  color: var(--brand);
  border-color: var(--brand);
}

/* ── 터미널/코드 블록 ────────────────────────────────────── */
.fa-window-dots {
  display: flex;
  gap: .375rem;
}
.fa-window-dots i {
  display: block;
  height: .4375rem;
  width: .4375rem;
  background: #70727e;
  border-radius: 50%;
}
.fa-window-dots i:first-child {
  background: var(--brand);
}
.fa-terminal {
  overflow: hidden;
  background: var(--fa-dark);
  color: #dcdfe6;
  border: 1px solid var(--fa-dark-line);
  border-radius: .75rem;
  box-shadow: 0 25px 60px #0f10121a;
}
.fa-terminal-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--fa-dark-surface-3);
  padding: .8125rem 1.0625rem;
  border-bottom: 1px solid var(--fa-dark-line-soft);
  font-family: var(--font-mono);
  font-size: .75rem;
  color: #b6b6bf;
}
.fa-terminal-window {
  display: flex;
  gap: 1.25rem;
  align-items: center;
  min-width: 0;
}
.fa-terminal-window > span {
  font-size: .75rem;
}
.fa-code-tabs {
  display: flex;
  gap: .3125rem;
  padding: .8125rem 1rem;
  border-bottom: 1px solid var(--fa-dark-line-soft);
  background: var(--fa-dark-surface-2);
  overflow-x: auto;
}
.fa-code-tabs button {
  border: 0;
  background: transparent;
  white-space: nowrap;
  color: #9b9ba6;
  padding: .4375rem .625rem;
  font-size: .75rem;
  border-radius: .375rem;
}
.fa-code-tabs button[aria-selected=true] {
  background: var(--fa-dark-surface-tint);
  color: var(--brand);
}
.fa-copy {
  background: transparent;
  color: #b6b6bf;
  border: 1px solid #484850;
  padding: .25rem .5625rem;
  font-size: .75rem;
  border-radius: .3125rem;
}
.fa-code {
  font: .8125rem/1.95 var(--font-mono);
  padding: 1.625rem;
  margin: 0;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  word-break: break-word;
  color: #dddfe8;
  min-height: 19.375rem;
}
.fa-response {
  padding: 0 1.625rem 1.625rem;
  color: #aeb6aa;
  font: .75rem/1.9 var(--font-mono);
  overflow-wrap: anywhere;
  border-top: 1px solid var(--fa-dark-border-faint);
  padding-top: 1.3125rem;
  margin: 0;
}
.fa-response-label {
  display: flex;
  align-items: center;
  gap: .5625rem;
  color: var(--brand);
  font: .6875rem var(--font-mono);
  letter-spacing: .06em;
  margin-bottom: .75rem;
}
.fa-response-label:before {
  content: "";
  width: .875rem;
  height: 1px;
  background: var(--brand);
}
.fa-terminal-status { 
  display: flex;
  justify-content: space-between;
  border-top: 1px solid var(--fa-dark-border-faint);
  padding: .5rem 1.125rem;
  background: var(--fa-dark-surface-2);
  color: #9296a4;
  font: .6875rem/1.5 var(--font-mono);
}

/* ── Footer ──────────────────────────────────────────────── */
.fa-footer {
  padding: 0 0 1.875rem;
  background: var(--fa-dark);
  color: #f5f5f7;
}
.fa-footer a {
  color: inherit;
  text-decoration: none;
}
.fa-footer > .fa-container {
  padding-top: 3.4375rem;
}
.fa-footer-top {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 3.75rem;
  min-height: 14.375rem;
}
.fa-footer-brand {
  font-size: 2.3125rem;
  font-weight: 850;
  letter-spacing: -.1125rem;
  display: inline-flex;
  align-items: center;
}
.fa-footer-logo {
  display: block;
  width: 13.125rem;
  height: auto;
  filter: brightness(0) invert(1);
}
.fa-footer-mark {
  margin-top: 1.375rem;
  color: #aaaab2;
  font-size: .75rem;
  letter-spacing: .05em;
}
.fa-footer-col h3 {
  font-size: .75rem;
  font-weight: 600;
  letter-spacing: .08em;
  margin: .625rem 0 1.375rem;
  color: #aaaab3;
}
.fa-footer-col a {
  display: block;
  font-size: .9375rem;
  margin: .8125rem 0;
  width: fit-content;
}
.fa-footer-bottom {
  border-top: 1px solid var(--fa-dark-border-soft);
  padding-top: 1.625rem;
  display: flex;
  justify-content: space-between;
  gap: 1.25rem;
  font-size: .75rem;
  color: #aaaab3;
}
.fa-footer-bottom div {
  display: flex;
  gap: 1.5625rem;
}

.fa-sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
}

/* ── 반응형 ──────────────────────────────────────────────── */
@media (max-width: 1100px) {
  .fa-container { padding: 0 2rem; }
  .fa-nav-links { margin-left: 0; gap: 1.5rem; }
  .fa-section-title { font-size: 2.75rem; }
  .fa-code { font-size: .75rem; padding: 1.25rem; }
}
@media (max-width: 760px) {
  .fa-container { padding: 0 1.375rem; }
  .fa-page-header { padding: 5rem 0 2.75rem; }
  .fa-page-header h1 { font-size: clamp(2.75rem, 15vw, 4.25rem); }
  .fa-page-header h1 + p { font-size: 1rem; }
  .fa-nav-inner {
    flex-wrap: wrap;
    gap: .75rem;
    padding-top: 1rem;
    padding-bottom: .8125rem;
  }
  .fa-brand { font-size: 1.4375rem; }
  .fa-brand-logo { width: 7.8125rem; }
  .fa-nav-links { order: 3; width: 100%; justify-content: center; gap: 2.1875rem; font-size: .8125rem; }
  .fa-nav-actions { gap: .5rem; }
  .fa-console { padding: .5rem .625rem; font-size: .75rem; }
  .fa-console svg { display: none; }
  .fa-btn { font-size: .875rem; padding: .8125rem 1.0625rem; gap: .625rem; }
  .fa-section { padding: 4.0625rem 0; }
  .fa-section-title { font-size: 2.25rem; }
  .fa-section-intro { font-size: 1rem; }
  .fa-footer > .fa-container { padding-top: 2.5rem; }
  .fa-footer-top { grid-template-columns: 1fr 1fr; gap: 1.5625rem; }
  .fa-footer-identity { grid-column: 1/-1; margin-bottom: .9375rem; }
  .fa-footer-bottom { flex-direction: column; margin-top: 2.5rem; }
  .fa-footer-brand { font-size: 2rem; }
  .fa-footer-logo { width: 11.25rem; }
  .fa-code-tabs { gap: 1px; padding-left: .625rem; padding-right: .625rem; }
  .fa-code-tabs button { padding: .4375rem .5rem; }
  .fa-code { min-height: 18.125rem; }
  .fa-terminal-window { gap: .75rem; }
  .fa-terminal .fa-code { font-size: .6875rem; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .fa-navbar, .fa-btn { transition: none; }
}

html { scroll-behavior: smooth; scroll-padding-top: 6.25rem; }
[hidden] { display: none !important; }