/* AutoFrame landing — vanilla CSS */

:root {
  --brand: #3949AB;
  --brand-600: #303F9F;
  --brand-300: #7986CB;
  --accent: #F6B52D;
  --bg: #FAFAFA;
  --bg-alt: #F2F3F8;
  --surface: #FFFFFF;
  --line: #E4E6EF;
  --text: #1F1F1F;
  --text-2: #666666;
  --shadow: 0 1px 2px rgba(20, 22, 40, .06), 0 8px 24px rgba(20, 22, 40, .06);
  --shadow-lg: 0 2px 4px rgba(20, 22, 40, .08), 0 20px 48px rgba(20, 22, 40, .12);
  --r: 14px;
  --wrap: 1120px;
}

html[data-theme="dark"] {
  --brand: #7986CB;
  --brand-600: #9FA8DA;
  --brand-300: #5C6BC0;
  --accent: #FFC93D;
  --bg: #121212;
  --bg-alt: #171719;
  --surface: #1E1E1E;
  --line: #2E2E32;
  --text: #FFFFFF;
  --text-2: #B0B0B0;
  --shadow: 0 1px 2px rgba(0, 0, 0, .5), 0 8px 24px rgba(0, 0, 0, .35);
  --shadow-lg: 0 2px 6px rgba(0, 0, 0, .55), 0 24px 56px rgba(0, 0, 0, .45);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; scroll-padding-top: 80px; }

body {
  margin: 0;
  font-family: "Noto Sans KR", "Google Sans", Inter, Roboto, -apple-system, "Segoe UI", sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  transition: background .25s ease, color .25s ease;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }

h1, h2, h3 { line-height: 1.28; letter-spacing: -.02em; margin: 0; font-weight: 700; }
p { margin: 0; }

.wrap { width: 100%; max-width: var(--wrap); margin: 0 auto; padding: 0 20px; }
.wrap-narrow { max-width: 760px; }

.skip {
  position: absolute; left: -9999px; top: 0;
  background: var(--brand); color: #fff; padding: 10px 16px; z-index: 100;
}
.skip:focus { left: 12px; top: 12px; border-radius: 8px; }

/* ---------- nav ---------- */
.nav {
  position: sticky; top: 0; z-index: 50;
  backdrop-filter: blur(12px);
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  border-bottom: 1px solid transparent;
  transition: border-color .2s ease, box-shadow .2s ease;
}
.nav.is-stuck { border-bottom-color: var(--line); box-shadow: 0 1px 12px rgba(0, 0, 0, .05); }

.nav-inner { display: flex; align-items: center; gap: 20px; height: 64px; }

.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 19px; letter-spacing: -.02em; }
.brand img { border-radius: 7px; }

.nav-links { display: flex; gap: 26px; margin-left: auto; font-size: 15px; color: var(--text-2); }
.nav-links a { transition: color .15s ease; }
.nav-links a:hover { color: var(--text); }

.nav-actions { display: flex; align-items: center; gap: 10px; }

.lang {
  display: flex; align-items: center;
  border: 1px solid var(--line); border-radius: 10px; overflow: hidden;
  background: var(--surface); font-size: 12px; font-weight: 500;
}
.lang a {
  padding: 8px 11px; color: var(--text-2); line-height: 1;
  transition: color .15s ease, background .15s ease;
}
.lang a:hover { color: var(--text); }
.lang a.is-on { color: #fff; background: var(--brand); }
html[data-theme="dark"] .lang a.is-on { color: #10131f; }

.theme-toggle {
  width: 38px; height: 38px; border-radius: 10px;
  border: 1px solid var(--line); background: var(--surface); color: var(--text-2);
  font-size: 16px; cursor: pointer; line-height: 1;
  transition: color .15s ease, border-color .15s ease;
}
.theme-toggle:hover { color: var(--text); border-color: var(--brand); }

/* ---------- buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 13px 24px; border-radius: 999px;
  font-size: 16px; font-weight: 500; white-space: nowrap;
  transition: transform .15s ease, box-shadow .2s ease, background .2s ease, border-color .2s ease;
}
.btn:active { transform: translateY(1px); }
.btn-sm { padding: 8px 18px; font-size: 14px; }
.btn-lg { padding: 16px 34px; font-size: 17px; }
.btn-block { width: 100%; margin-top: 18px; }

.btn-primary { background: var(--brand); color: #fff; box-shadow: 0 6px 18px color-mix(in srgb, var(--brand) 32%, transparent); }
.btn-primary:hover { background: var(--brand-600); box-shadow: 0 10px 26px color-mix(in srgb, var(--brand) 40%, transparent); }
html[data-theme="dark"] .btn-primary { color: #10131f; }

.btn-ghost { background: var(--surface); color: var(--text); border: 1px solid var(--line); }
.btn-ghost:hover { border-color: var(--brand); color: var(--brand); }

/* ---------- hero ---------- */
.hero { position: relative; padding: 72px 0 88px; overflow: hidden; }
.hero::before {
  content: ""; position: absolute; inset: -30% -20% auto -20%; height: 620px; z-index: -1;
  background:
    radial-gradient(48% 52% at 22% 30%, color-mix(in srgb, var(--brand) 20%, transparent), transparent 70%),
    radial-gradient(42% 46% at 82% 22%, color-mix(in srgb, var(--accent) 22%, transparent), transparent 70%);
  filter: blur(6px);
}

.hero-inner { display: grid; grid-template-columns: 1.05fr .95fr; gap: 56px; align-items: center; }

.eyebrow {
  display: inline-block; font-size: 13px; font-weight: 500; letter-spacing: .04em;
  color: var(--brand); background: color-mix(in srgb, var(--brand) 12%, transparent);
  padding: 6px 14px; border-radius: 999px; margin-bottom: 20px;
}

.hero h1 { font-size: clamp(32px, 5.2vw, 52px); }
.grad {
  background: linear-gradient(100deg, var(--brand), var(--accent));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}

.grad-premium {
  background: linear-gradient(100deg, #A855F7, #F472B6 55%, #FB923C);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}

.lead { margin-top: 20px; font-size: 17px; color: var(--text-2); max-width: 46ch; }

.cta-row { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 32px; }

.hero-facts {
  display: flex; flex-wrap: wrap; gap: 8px 26px;
  list-style: none; margin: 32px 0 0; padding: 0;
  font-size: 14px; color: var(--text-2);
}
.hero-facts li::before { content: "✓"; color: var(--brand); margin-right: 7px; font-weight: 700; }

/* ---------- hero frame mock ---------- */
.hero-visual { display: flex; flex-direction: column; align-items: center; gap: 14px; }

.frame {
  width: 100%; max-width: 420px; aspect-ratio: 4 / 3;
  padding: 14px; border-radius: 18px;
  background: linear-gradient(160deg, #6b5442, #3d3028);
  box-shadow: var(--shadow-lg);
  transform: perspective(1200px) rotateY(-7deg) rotateX(2deg);
  transition: transform .5s cubic-bezier(.2, .7, .3, 1);
}
.frame:hover { transform: perspective(1200px) rotateY(0deg) rotateX(0deg); }

.frame-screen {
  position: relative; width: 100%; height: 100%;
  border-radius: 8px; overflow: hidden; background: #000;
}

.slides { position: absolute; inset: 0; }

.slide {
  position: absolute; inset: 0; margin: 0;
  background: linear-gradient(145deg, var(--a), var(--b));
  opacity: 0; transition: opacity 1.1s ease;
  display: flex; align-items: flex-end;
}
.slide.is-active { opacity: 1; }
.slide::after {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(to top, rgba(0, 0, 0, .55), transparent 45%);
}

.slide figcaption {
  position: relative; z-index: 1; width: 100%;
  display: flex; justify-content: space-between; align-items: center; gap: 10px;
  padding: 14px 16px; color: #fff; font-size: 13px;
}
.slide .date { opacity: .9; }
.slide .tag {
  background: rgba(0, 0, 0, .45); padding: 4px 11px; border-radius: 999px;
  font-weight: 500; backdrop-filter: blur(4px);
}

.frame-dots { position: absolute; left: 0; right: 0; bottom: 44px; display: flex; justify-content: center; gap: 6px; }
.frame-dots span { width: 6px; height: 6px; border-radius: 50%; background: rgba(255, 255, 255, .4); transition: background .3s ease, width .3s ease; }
.frame-dots span.on { width: 18px; border-radius: 999px; background: #fff; }

.frame-caption { font-size: 12px; color: var(--text-2); }

/* ---------- trust strip ---------- */
.trust { padding: 0 0 16px; }
.trust-inner {
  display: flex; align-items: flex-start; gap: 14px;
  padding: 18px 22px; border-radius: var(--r);
  background: var(--surface); border: 1px solid var(--line);
}
.trust-ico {
  flex: none; width: 40px; height: 40px; border-radius: 12px;
  display: grid; place-items: center; color: var(--brand);
  background: color-mix(in srgb, var(--brand) 12%, transparent);
  border: 1px solid color-mix(in srgb, var(--brand) 28%, transparent);
  box-shadow: 0 6px 18px color-mix(in srgb, var(--brand) 22%, transparent);
}
.trust-ico .ic { width: 21px; height: 21px; }
.trust p { font-size: 15px; color: var(--text-2); }
.trust strong { color: var(--text); font-weight: 500; }
.trust a { color: var(--brand); text-decoration: underline; text-underline-offset: 3px; white-space: nowrap; }

/* ---------- sections ---------- */
.section { padding: 88px 0; }
.section-alt { background: var(--bg-alt); }
.section h2 { font-size: clamp(26px, 3.4vw, 36px); text-align: center; }
.section-lead { text-align: center; color: var(--text-2); margin-top: 12px; }

.grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 18px; margin-top: 24px;
}

/* ---------- feature subsections ---------- */
.sub-head {
  display: flex; flex-wrap: wrap; justify-content: center; align-items: center;
  gap: 8px 12px; margin-top: 60px; text-align: center;
}
.sub-head-premium { margin-top: 88px; }
.sub-title { font-size: clamp(21px, 2.6vw, 27px); }
.sub-desc { width: 100%; font-size: 15px; color: var(--text-2); }

.chip {
  display: inline-flex; align-items: center; gap: 5px;
  font-size: 12px; font-weight: 500; letter-spacing: .02em;
  padding: 4px 12px; border-radius: 999px; line-height: 1.6;
}
.chip .ic { width: 13px; height: 13px; }
.chip-free {
  color: var(--brand); background: color-mix(in srgb, var(--brand) 13%, transparent);
  border: 1px solid color-mix(in srgb, var(--brand) 30%, transparent);
}
.chip-premium {
  color: #A855F7; background: color-mix(in srgb, #A855F7 12%, transparent);
  border: 1px solid color-mix(in srgb, #A855F7 45%, transparent);
  box-shadow: 0 0 18px color-mix(in srgb, #A855F7 22%, transparent);
}
html[data-theme="dark"] .chip-premium { color: #C084FC; }

.card h4 { font-size: 17px; font-weight: 700; letter-spacing: -.02em; line-height: 1.28; margin: 0; }

/* premium cards: circular icon, five across */
.grid-premium { grid-template-columns: repeat(5, 1fr); }
.card-premium { padding: 30px 22px; }
.card-premium .ico {
  width: 78px; height: 78px; border-radius: 50%;
  margin: 0 auto 22px;
}
.card-premium .ic { width: 34px; height: 34px; }

/* aurora glow behind the features section */
.section-aurora { position: relative; overflow: hidden; }
.section-aurora > * { position: relative; z-index: 1; }
.section-aurora::before {
  content: ""; position: absolute; inset: -10% -15%; z-index: 0; pointer-events: none;
  background:
    radial-gradient(38% 40% at 8% 12%, color-mix(in srgb, var(--accent) 16%, transparent), transparent 70%),
    radial-gradient(34% 38% at 92% 78%, color-mix(in srgb, var(--brand) 18%, transparent), transparent 70%);
}
html[data-theme="dark"] .section-aurora::before {
  background:
    radial-gradient(38% 40% at 8% 12%, color-mix(in srgb, var(--accent) 22%, transparent), transparent 70%),
    radial-gradient(36% 40% at 92% 78%, color-mix(in srgb, #8B5CF6 30%, transparent), transparent 70%);
}

.card {
  position: relative;
  --c: var(--brand);
  background:
    linear-gradient(180deg, color-mix(in srgb, var(--c) 7%, transparent), transparent 62%),
    var(--surface);
  border: 1px solid var(--line);
  border-radius: 20px; padding: 26px 24px;
  transition: transform .22s ease, box-shadow .25s ease, border-color .25s ease;
}
.card:hover {
  transform: translateY(-4px);
  border-color: color-mix(in srgb, var(--c) 45%, var(--line));
  box-shadow: 0 10px 34px color-mix(in srgb, var(--c) 20%, transparent), var(--shadow);
}
html[data-theme="dark"] .card {
  background:
    linear-gradient(180deg, color-mix(in srgb, var(--c) 12%, transparent), transparent 62%),
    rgba(255, 255, 255, .028);
  border-color: rgba(255, 255, 255, .09);
}
html[data-theme="dark"] .card:hover { box-shadow: 0 14px 44px color-mix(in srgb, var(--c) 26%, transparent); }

/* icon tile */
.card .ico {
  width: 54px; height: 54px; border-radius: 16px;
  display: grid; place-items: center; color: var(--c);
  background: color-mix(in srgb, var(--c) 13%, transparent);
  border: 1px solid color-mix(in srgb, var(--c) 32%, transparent);
  box-shadow: 0 0 0 5px color-mix(in srgb, var(--c) 6%, transparent),
              0 8px 22px color-mix(in srgb, var(--c) 26%, transparent);
  margin-bottom: 18px;
  transition: box-shadow .25s ease, transform .22s ease;
}
.card:hover .ico {
  transform: translateY(-1px);
  box-shadow: 0 0 0 6px color-mix(in srgb, var(--c) 10%, transparent),
              0 10px 28px color-mix(in srgb, var(--c) 42%, transparent);
}
.ic { width: 26px; height: 26px; display: block; }

.card h3 { font-size: 17px; }
.card p { margin-top: 8px; font-size: 15px; color: var(--text-2); }

/* "NEW" flag */
.flag {
  position: absolute; top: 16px; right: 16px;
  font-size: 11px; font-weight: 700; letter-spacing: .06em;
  padding: 3px 10px; border-radius: 999px; color: var(--c);
  background: color-mix(in srgb, var(--c) 14%, transparent);
  border: 1px solid color-mix(in srgb, var(--c) 40%, transparent);
}

/* ---------- steps ---------- */
.steps {
  list-style: none; margin: 48px 0 0; padding: 0;
  display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 22px;
}
.step {
  background: var(--surface); border: 1px solid var(--line);
  border-radius: var(--r); padding: 28px 24px;
}
.step-no {
  display: inline-flex; align-items: center; justify-content: center;
  width: 34px; height: 34px; border-radius: 50%;
  background: var(--brand); color: #fff; font-weight: 700; font-size: 15px; margin-bottom: 14px;
}
html[data-theme="dark"] .step-no { color: #10131f; }
.step h3 { font-size: 17px; }
.step p { margin-top: 8px; font-size: 15px; color: var(--text-2); }

/* ---------- pricing ---------- */
.price-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 20px; margin-top: 48px; align-items: start;
}
.price {
  position: relative; background: var(--surface); border: 1px solid var(--line);
  border-radius: var(--r); padding: 30px 26px; text-align: center;
}
.price.is-best { border-color: var(--brand); box-shadow: var(--shadow); }
.badge {
  position: absolute; top: -12px; left: 50%; transform: translateX(-50%);
  background: var(--brand); color: #fff; font-size: 12px; font-weight: 500;
  padding: 4px 14px; border-radius: 999px; white-space: nowrap;
}
html[data-theme="dark"] .badge { color: #10131f; }
.price h3 { font-size: 15px; color: var(--text-2); font-weight: 500; }
.amount { font-size: 38px; font-weight: 700; letter-spacing: -.03em; margin-top: 6px; }
.amount span { font-size: 17px; font-weight: 500; margin-left: 3px; }
.per { font-size: 14px; color: var(--text-2); margin-top: 4px; }
.price-note { text-align: center; margin-top: 28px; font-size: 13px; color: var(--text-2); }

/* ---------- faq ---------- */
.faq { margin-top: 40px; display: flex; flex-direction: column; gap: 10px; }
.faq details {
  background: var(--surface); border: 1px solid var(--line);
  border-radius: 12px; padding: 4px 20px;
}
.faq summary {
  list-style: none; cursor: pointer; padding: 16px 28px 16px 0;
  font-weight: 500; position: relative;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: "+"; position: absolute; right: 2px; top: 50%; transform: translateY(-50%);
  font-size: 20px; color: var(--text-2); transition: transform .2s ease;
}
.faq details[open] summary::after { content: "−"; }
.faq details p { padding-bottom: 18px; font-size: 15px; color: var(--text-2); }

/* ---------- cta ---------- */
.cta { padding: 96px 0; text-align: center; }
.cta-inner h2 { font-size: clamp(24px, 3.2vw, 34px); }
.cta-inner p { margin-top: 12px; color: var(--text-2); }
.cta-inner .btn { margin-top: 30px; }

/* ---------- footer ---------- */
.footer { border-top: 1px solid var(--line); padding: 36px 0; background: var(--bg-alt); }
.footer-inner { display: flex; flex-wrap: wrap; align-items: center; gap: 16px 28px; }
.footer-brand { display: flex; align-items: center; gap: 9px; font-weight: 700; }
.footer-links { display: flex; flex-wrap: wrap; gap: 20px; font-size: 14px; color: var(--text-2); }
.footer-links a:hover { color: var(--text); }
.copy { margin-left: auto; font-size: 13px; color: var(--text-2); }

/* ---------- legal pages ---------- */
.legal { padding: 56px 0 88px; }
.legal-head { padding-bottom: 22px; border-bottom: 1px solid var(--line); margin-bottom: 12px; }
.legal-head h1 { font-size: clamp(26px, 4vw, 36px); }
.legal-meta { margin-top: 10px; font-size: 14px; color: var(--text-2); }

.legal-body h2 {
  font-size: 20px; text-align: left; margin-top: 44px;
  padding-top: 4px; scroll-margin-top: 84px;
}
.legal-body h3 { font-size: 16px; margin-top: 24px; }
.legal-body p { margin-top: 12px; color: var(--text-2); font-size: 15px; }
.legal-body ul { margin: 12px 0 0; padding-left: 20px; color: var(--text-2); font-size: 15px; }
.legal-body li { margin-top: 7px; }
.legal-body li::marker { color: var(--brand); }
.legal-body strong { color: var(--text); font-weight: 500; }
.legal-body a { color: var(--brand); text-decoration: underline; text-underline-offset: 3px; }

.legal-body code, .legal-meta code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: .9em; padding: 2px 6px; border-radius: 6px;
  background: var(--bg-alt); border: 1px solid var(--line); word-break: break-all;
}

.legal-table { width: 100%; overflow-x: auto; margin-top: 16px; }
.legal-table table { width: 100%; border-collapse: collapse; font-size: 14px; min-width: 460px; }
.legal-table th, .legal-table td {
  text-align: left; padding: 11px 14px; border-bottom: 1px solid var(--line); vertical-align: top;
}
.legal-table th { font-weight: 500; color: var(--text); background: var(--bg-alt); }
.legal-table td { color: var(--text-2); }

.note {
  margin-top: 20px; padding: 16px 18px; border-radius: 12px;
  background: var(--bg-alt); border: 1px solid var(--line);
  font-size: 14px; color: var(--text-2);
}

.legal-nav { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 48px; }

/* legal link buttons on the landing page footer */
.legal-links { display: flex; flex-wrap: wrap; gap: 10px; width: 100%; }
.btn-outline {
  padding: 9px 18px; font-size: 14px; border-radius: 999px;
  border: 1px solid var(--line); background: var(--surface); color: var(--text-2);
}
.btn-outline:hover { border-color: var(--brand); color: var(--brand); }

/* ---------- reveal ---------- */
.reveal { opacity: 0; transform: translateY(16px); transition: opacity .55s ease, transform .55s ease; }
.reveal.in { opacity: 1; transform: none; }

/* ---------- responsive ---------- */
@media (max-width: 1080px) {
  .grid-premium { grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 740px) {
  .grid-premium { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 900px) {
  .hero-inner { grid-template-columns: 1fr; gap: 44px; }
  .hero { padding: 48px 0 64px; }
  .frame { transform: none; }
  .lead { max-width: none; }
  .nav-links { display: none; }
  .copy { margin-left: 0; width: 100%; }
}

@media (max-width: 480px) {
  .grid-premium { grid-template-columns: 1fr; }
  .section { padding: 64px 0; }
  .cta { padding: 72px 0; }
  .cta-row .btn { width: 100%; }
}

@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; }
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; }
}