/* OriginSeal — 원작 보호 서비스 랜딩
   규칙: 4px 간격 그리드 · WCAG AA · 라이트/다크 · 인라인 스타일 없음(CSP style-src 'self')
*/

:root {
  --bg: #F7F5F0;
  --surface: #FFFFFF;
  --surface-2: #EFEBE2;
  --ink: #102A56;
  --text: #16202E;
  --muted: #55606F;
  --line: #D9D3C7;
  --line-strong: #BFB6A5;
  --accent: #0B5B54;
  --accent-text: #FFFFFF;
  --accent-soft: #DBEDE8;
  --bad: #8E2D22;
  --bad-soft: #F6E1DD;
  --warn: #7A4A10;
  --shadow: 0 1px 2px rgba(16, 42, 86, .06), 0 12px 32px rgba(16, 42, 86, .06);
  --radius: 16px;
  --radius-sm: 8px;
  --sans: "Paperlogy", "Pretendard", -apple-system, BlinkMacSystemFont, "Apple SD Gothic Neo",
    "Malgun Gothic", system-ui, sans-serif;
  --mono: ui-monospace, "SFMono-Regular", "Cascadia Mono", Consolas, monospace;
}

html[data-theme="dark"] {
  --bg: #0A1017;
  --surface: #111A22;
  --surface-2: #16222C;
  --ink: #F7F5F0;
  --text: #E9EEF4;
  --muted: #A3AFBE;
  --line: #22303C;
  --line-strong: #35485A;
  --accent: #6FD8C4;
  --accent-text: #06231F;
  --accent-soft: #123330;
  --bad: #F08A7E;
  --bad-soft: #341714;
  --warn: #E8B665;
  --shadow: 0 1px 2px rgba(0, 0, 0, .4), 0 16px 40px rgba(0, 0, 0, .32);
}

*,
*::before,
*::after { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }

body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.65;
  letter-spacing: -0.01em;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3, p, ul, ol, dl, dd, figure, blockquote { margin: 0; padding: 0; }
ul, ol { list-style: none; }
a { color: inherit; text-decoration: none; }
img, svg { display: block; max-width: 100%; }
button { font: inherit; }

.shell { width: 100%; max-width: 1120px; margin: 0 auto; padding: 0 40px; }
.skip { position: absolute; left: -9999px; top: 0; padding: 12px 16px; background: var(--accent); color: var(--accent-text); border-radius: var(--radius-sm); z-index: 99; }
.skip:focus { left: 16px; top: 16px; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 4px; }

/* ── 헤더 ─────────────────────────────────────────────── */
.site-head { position: sticky; top: 0; z-index: 40; background: var(--bg); border-bottom: 1px solid var(--line); }
.head-row { display: flex; align-items: center; gap: 24px; min-height: 72px; }
.brand { display: inline-flex; align-items: center; gap: 12px; color: var(--ink); font-weight: 700; letter-spacing: -0.02em; }
.brand svg { width: 28px; height: 28px; color: var(--accent); flex: none; }
.brand-name { font-size: 18px; line-height: 1.2; }
.brand-sub { font-size: 12px; font-weight: 400; color: var(--muted); padding-top: 4px; }
.head-nav { display: flex; align-items: center; gap: 4px; margin-left: auto; }
.head-nav a { display: inline-flex; align-items: center; min-height: 40px; padding: 0 12px; font-size: 14px; color: var(--muted); border-radius: var(--radius-sm); }
.head-nav a:hover { color: var(--text); background: var(--surface-2); }
.head-tools { display: flex; align-items: center; gap: 8px; }
.icon-btn { display: inline-grid; place-items: center; width: 40px; height: 40px; padding: 0; color: var(--muted); background: transparent; border: 1px solid var(--line); border-radius: var(--radius-sm); cursor: pointer; }
.icon-btn:hover { color: var(--text); border-color: var(--line-strong); }
.icon-btn svg { width: 16px; height: 16px; }
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; min-height: 44px; padding: 0 20px; font-size: 15px; font-weight: 600; border-radius: 999px; border: 1px solid transparent; cursor: pointer; transition: background .2s ease, color .2s ease, border-color .2s ease; }
.btn-primary { background: var(--accent); color: var(--accent-text); }
.btn-primary:hover { filter: brightness(.94); }
.btn-ghost { border-color: var(--line-strong); color: var(--text); background: transparent; }
.btn-ghost:hover { background: var(--surface-2); }
.btn svg { width: 16px; height: 16px; }
.head-cta { display: none; }

/* ── 히어로 ───────────────────────────────────────────── */
.hero { padding: 64px 0 72px; border-bottom: 1px solid var(--line); }
.hero-grid { display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr); gap: 48px; align-items: center; }
.eyebrow { display: inline-flex; align-items: center; gap: 8px; font-size: 12px; font-weight: 600; letter-spacing: 0.08em; text-transform: uppercase; color: var(--accent); }
.dot { width: 8px; height: 8px; border-radius: 50%; background: var(--accent); }
.hero h1 { margin: 16px 0 16px; font-size: 56px; font-weight: 800; line-height: 1.1; letter-spacing: -0.035em; color: var(--ink); }
.hero h1 em { font-style: normal; color: var(--accent); }
.hero-lead { max-width: 34em; font-size: 18px; line-height: 1.75; color: var(--muted); word-break: keep-all; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 32px; }
.hero-meta { display: flex; flex-wrap: wrap; gap: 8px 24px; margin-top: 32px; color: var(--muted); font-size: 14px; }
.hero-meta span { display: inline-flex; align-items: center; gap: 8px; }
.hero-meta svg { width: 16px; height: 16px; color: var(--accent); }

/* 증명서 카드(실제 제품 화면) */
.seal-card { position: relative; padding: 24px; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow); }
.seal-head { display: flex; align-items: center; gap: 12px; padding-bottom: 16px; border-bottom: 1px solid var(--line); }
.seal-head svg { width: 24px; height: 24px; color: var(--accent); }
.seal-head b { font-size: 13px; letter-spacing: 0.08em; text-transform: uppercase; color: var(--muted); font-weight: 600; }
.seal-badge { margin-left: auto; padding: 4px 8px; font-size: 11px; font-weight: 600; color: var(--accent); background: var(--accent-soft); border-radius: 999px; }
.seal-code { margin: 24px 0 8px; font-family: var(--mono); font-size: 28px; font-weight: 600; letter-spacing: 0.04em; color: var(--ink); }
.seal-sub { font-size: 13px; color: var(--muted); }
.seal-rows { display: grid; gap: 8px; margin: 24px 0; }
.seal-row { display: flex; justify-content: space-between; gap: 16px; font-size: 13px; }
.seal-row dt { color: var(--muted); }
.seal-row dd { color: var(--text); font-family: var(--mono); text-align: right; }
.meter { margin-top: 8px; }
.meter-head { display: flex; align-items: baseline; justify-content: space-between; font-size: 13px; color: var(--muted); }
.meter-head b { font-family: var(--mono); font-size: 24px; color: var(--ink); }
.bar { height: 8px; margin-top: 8px; background: var(--surface-2); border-radius: 999px; overflow: hidden; }
.bar i { display: block; height: 100%; background: var(--accent); border-radius: 999px; }
.seal-verdict { display: flex; align-items: center; gap: 8px; margin-top: 16px; padding: 12px; font-size: 13px; color: var(--warn); background: var(--surface-2); border-radius: var(--radius-sm); }
.seal-verdict svg { width: 16px; height: 16px; flex: none; }

/* ── 섹션 공통 ─────────────────────────────────────────── */
.section { padding: 88px 0; border-bottom: 1px solid var(--line); }
.section-head { max-width: 720px; margin-bottom: 48px; }
.label { display: inline-flex; align-items: center; gap: 8px; font-size: 12px; font-weight: 700; letter-spacing: 0.08em; color: var(--muted); text-transform: uppercase; }
.label b { color: var(--accent); }
.section h2 { margin: 12px 0 16px; font-size: 40px; font-weight: 700; line-height: 1.2; letter-spacing: -0.03em; color: var(--ink); }
.section-note { font-size: 16px; color: var(--muted); word-break: keep-all; }

/* 01 문제 */
.problem-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 24px; }
.problem { padding: 24px; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); }
.problem-num { font-family: var(--mono); font-size: 12px; color: var(--accent); }
.problem h3 { margin: 12px 0 8px; font-size: 19px; font-weight: 700; line-height: 1.4; color: var(--ink); letter-spacing: -0.02em; }
.problem p { font-size: 14px; color: var(--muted); word-break: keep-all; }

/* 02 단계 */
.steps { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 24px; counter-reset: step; }
.step { position: relative; padding-top: 24px; border-top: 2px solid var(--line); }
.step::before { content: ""; position: absolute; top: -2px; left: 0; width: 32px; height: 2px; background: var(--accent); }
.step-n { font-family: var(--mono); font-size: 12px; color: var(--accent); }
.step h3 { margin: 8px 0 8px; font-size: 17px; font-weight: 700; color: var(--ink); }
.step p { font-size: 14px; color: var(--muted); word-break: keep-all; }

/* 03 기술 3축 */
.tech-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 24px; }
.tech { display: flex; flex-direction: column; gap: 12px; padding: 24px; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); }
.tech-fig { display: grid; place-items: center; height: 96px; background: var(--surface-2); border-radius: var(--radius-sm); }
.tech-fig svg { width: 56px; height: 56px; color: var(--accent); }
.tech h3 { font-size: 19px; font-weight: 700; color: var(--ink); letter-spacing: -0.02em; }
.tech p { font-size: 14px; color: var(--muted); word-break: keep-all; }
.tech ul { display: grid; gap: 8px; margin-top: 4px; }
.tech li { position: relative; padding-left: 16px; font-size: 13px; color: var(--text); }
.tech li::before { content: ""; position: absolute; left: 0; top: 8px; width: 6px; height: 6px; border-radius: 50%; background: var(--accent); }

/* 04 보호 계층 */
.guard-list { display: grid; gap: 0; border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; background: var(--surface); }
.guard { display: grid; grid-template-columns: 48px minmax(0, 1fr) minmax(0, 1.1fr); gap: 24px; padding: 24px; border-bottom: 1px solid var(--line); align-items: start; }
.guard:last-child { border-bottom: 0; }
.guard-ico { display: grid; place-items: center; width: 40px; height: 40px; color: var(--accent); background: var(--accent-soft); border-radius: var(--radius-sm); }
.guard-ico svg { width: 20px; height: 20px; }
.guard h3 { font-size: 16px; font-weight: 700; color: var(--ink); }
.guard p { margin-top: 4px; font-size: 14px; color: var(--muted); word-break: keep-all; }
.guard-detail { font-size: 14px; color: var(--text); word-break: keep-all; }
.guard-detail code { font-family: var(--mono); font-size: 13px; color: var(--accent); }

/* 05 데모 */
.demo { padding: 24px; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); }
.demo-grid { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 16px; }
.drop { display: grid; place-items: center; gap: 8px; min-height: 128px; padding: 16px; text-align: center; color: var(--muted); background: var(--surface-2); border: 1px dashed var(--line-strong); border-radius: var(--radius-sm); cursor: pointer; }
.drop:hover { color: var(--text); border-color: var(--accent); }
.drop.is-over { border-color: var(--accent); color: var(--text); background: var(--accent-soft); }
.drop.is-set { border-style: solid; border-color: var(--accent); color: var(--text); }
.drop b { font-size: 14px; font-weight: 600; color: var(--text); }
.drop span { font-size: 12px; }
.drop svg { width: 24px; height: 24px; color: var(--accent); }
.demo-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 16px; margin-top: 16px; }
.demo-note { font-size: 12px; color: var(--muted); }
.demo-out { margin-top: 24px; padding: 24px; background: var(--surface-2); border-radius: var(--radius-sm); }
.demo-out.is-empty { color: var(--muted); font-size: 14px; }
.demo-score { display: flex; flex-wrap: wrap; align-items: baseline; gap: 8px; }
.demo-score b { font-family: var(--mono); font-size: 40px; color: var(--ink); letter-spacing: -0.02em; }
.demo-verdict { margin-top: 8px; font-size: 14px; font-weight: 600; }
.demo-verdict.is-bad { color: var(--bad); }
.demo-verdict.is-warn { color: var(--warn); }
.demo-verdict.is-ok { color: var(--accent); }
.layer-list { display: grid; gap: 12px; margin-top: 16px; }
.layer { display: grid; grid-template-columns: 88px minmax(0, 1fr) 56px; gap: 12px; align-items: center; font-size: 12px; color: var(--muted); }
.layer b { color: var(--text); font-weight: 600; }
.layer-val { font-family: var(--mono); text-align: right; color: var(--text); }

/* 06 요금 */
.price-grid { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 24px; align-items: start; }
.price-card { padding: 32px; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); }
.price-top { display: flex; align-items: baseline; gap: 8px; }
.price-num { font-size: 48px; font-weight: 800; letter-spacing: -0.03em; color: var(--ink); }
.price-unit { font-size: 16px; color: var(--muted); }
.price-plan { margin-top: 8px; font-size: 14px; color: var(--muted); }
.price-list { display: grid; gap: 12px; margin-top: 24px; }
.price-list li { position: relative; padding-left: 24px; font-size: 14px; }
.price-list li::before { content: ""; position: absolute; left: 0; top: 6px; width: 12px; height: 12px; border-left: 2px solid var(--accent); border-bottom: 2px solid var(--accent); transform: rotate(-45deg); }
.price-note { padding: 24px; font-size: 14px; color: var(--muted); background: var(--surface-2); border-radius: var(--radius); word-break: keep-all; }
.price-note b { display: block; margin-bottom: 8px; color: var(--text); font-size: 15px; }

/* 07 FAQ */
.faq { display: grid; gap: 0; border-top: 1px solid var(--line); }
.faq details { border-bottom: 1px solid var(--line); }
.faq summary { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: 20px 0; font-size: 16px; font-weight: 600; color: var(--ink); cursor: pointer; list-style: none; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary svg { width: 16px; height: 16px; color: var(--muted); flex: none; transition: transform .2s ease; }
.faq details[open] summary svg { transform: rotate(45deg); }
.faq p { padding: 0 0 20px; max-width: 62em; font-size: 14px; color: var(--muted); word-break: keep-all; }

/* 08 문의 */
.contact-grid { display: grid; grid-template-columns: minmax(0, .85fr) minmax(0, 1.15fr); gap: 48px; }
.contact-list { display: grid; gap: 16px; margin-top: 24px; }
.contact-list li { display: grid; gap: 4px; font-size: 14px; }
.contact-list b { color: var(--text); font-weight: 600; }
.contact-list span { color: var(--muted); }
.form { display: grid; gap: 16px; padding: 24px; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); }
.field { display: grid; gap: 8px; }
.field label { font-size: 13px; font-weight: 600; color: var(--text); }
.field input, .field textarea, .field select {
  width: 100%;
  padding: 12px;
  font: inherit;
  font-size: 14px;
  color: var(--text);
  background: var(--bg);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-sm);
}
.field textarea { min-height: 120px; resize: vertical; }
.field input::placeholder, .field textarea::placeholder { color: var(--muted); }
.hp { position: absolute; left: -9999px; width: 1px; height: 1px; padding: 0; margin: 0; border: 0; overflow: hidden; }
.form-foot { display: flex; flex-wrap: wrap; align-items: center; gap: 16px; }
.form-foot p { font-size: 12px; color: var(--muted); word-break: keep-all; }
.form-foot a { color: var(--accent); text-decoration: underline; text-underline-offset: 3px; }
.lf-status { font-size: 13px; color: var(--muted); }
.lf-status.is-ok { color: var(--accent); }
.lf-status.is-error { color: var(--bad); }

/* ── 문서 페이지(약관·개인정보) ─────────────────────────── */
.doc { padding: 64px 0 88px; }
.doc-head { max-width: 720px; margin-bottom: 40px; }
.doc-head h1 { margin: 12px 0 12px; font-size: 40px; font-weight: 800; letter-spacing: -0.03em; color: var(--ink); }
.doc-head p { font-size: 14px; color: var(--muted); }
.doc-body { max-width: 820px; }
.doc-body h2 { margin: 40px 0 12px; font-size: 20px; font-weight: 700; color: var(--ink); letter-spacing: -0.02em; }
.doc-body h2:first-child { margin-top: 0; }
.doc-body h3 { margin: 24px 0 8px; font-size: 16px; font-weight: 600; color: var(--text); }
.doc-body p, .doc-body li { font-size: 15px; color: var(--text); word-break: keep-all; }
.doc-body p + p { margin-top: 12px; }
.doc-body ol, .doc-body ul { display: grid; gap: 8px; margin: 12px 0; padding-left: 20px; }
.doc-body ol { list-style: decimal; }
.doc-body ul { list-style: disc; }
.doc-table { width: 100%; margin: 16px 0; border-collapse: collapse; font-size: 13px; }
.doc-table th, .doc-table td { padding: 12px; border: 1px solid var(--line); text-align: left; vertical-align: top; }
.doc-table th { color: var(--muted); font-weight: 600; background: var(--surface-2); }
.doc-callout { margin: 24px 0; padding: 16px 20px; font-size: 14px; color: var(--text); background: var(--surface-2); border-left: 3px solid var(--accent); border-radius: 0 var(--radius-sm) var(--radius-sm) 0; word-break: keep-all; }
.doc-nav { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 48px; padding-top: 24px; border-top: 1px solid var(--line); }
.doc-nav a { display: inline-flex; align-items: center; min-height: 40px; padding: 0 16px; font-size: 14px; border: 1px solid var(--line-strong); border-radius: 999px; color: var(--text); }
.doc-nav a:hover { background: var(--surface-2); }

/* ── 반응형 ───────────────────────────────────────────── */
@media (max-width: 1020px) {
  .hero-grid { grid-template-columns: 1fr; gap: 40px; }
  .hero h1 { font-size: 44px; }
  .problem-grid, .tech-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .steps { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .price-grid, .contact-grid { grid-template-columns: 1fr; gap: 24px; }
  .head-nav { display: none; }
  .head-cta { display: inline-flex; margin-left: auto; }
  .guard { grid-template-columns: 40px minmax(0, 1fr); gap: 16px; }
  .guard-detail { grid-column: 2; }
}

@media (max-width: 720px) {
  .shell { padding: 0 24px; }
  .hero { padding: 48px 0 56px; }
  .hero h1 { font-size: 36px; line-height: 1.16; }
  .hero-lead { font-size: 16px; }
  .section { padding: 64px 0; }
  .section h2 { font-size: 30px; }
  .section-head { margin-bottom: 32px; }
  .problem-grid, .tech-grid, .steps, .demo-grid { grid-template-columns: 1fr; }
  .seal-code { font-size: 22px; }
  .price-card { padding: 24px; }
  .price-num { font-size: 40px; }
  .doc-head h1 { font-size: 30px; }
  .layer { grid-template-columns: 72px minmax(0, 1fr) 48px; }
}

@media (max-width: 400px) {
  .shell { padding: 0 16px; }
  .hero h1 { font-size: 32px; }
  .section h2 { font-size: 27px; }
  .head-row { min-height: 64px; gap: 16px; }
  .brand-sub { display: none; }
  .btn { padding: 0 16px; font-size: 14px; }
  .hero-actions .btn { flex: 1 1 auto; }
  .price-num { font-size: 36px; }
  .seal-card, .demo, .form, .price-card { padding: 16px; }
  .demo-out { padding: 16px; }
}

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

/* 진행 바 폭(인라인 스타일 금지 → 클래스) */
.w-0 { width: 0%; } .w-4 { width: 4%; } .w-8 { width: 8%; } .w-12 { width: 12%; }
.w-16 { width: 16%; } .w-20 { width: 20%; } .w-24 { width: 24%; } .w-28 { width: 28%; }
.w-32 { width: 32%; } .w-36 { width: 36%; } .w-40 { width: 40%; } .w-44 { width: 44%; }
.w-48 { width: 48%; } .w-52 { width: 52%; } .w-56 { width: 56%; } .w-60 { width: 60%; }
.w-64 { width: 64%; } .w-68 { width: 68%; } .w-72 { width: 72%; } .w-76 { width: 76%; }
.w-80 { width: 80%; } .w-84 { width: 84%; } .w-88 { width: 88%; } .w-92 { width: 92%; }
.w-96 { width: 96%; } .w-100 { width: 100%; }