/* 수학나침반 브랜딩 면 공용 스타일 — 정본: web/public/landing/service5/ (docs/bm/README.md §6) */
:root{
  --paper:#f7f5f0; --paper-2:#efece4; --ink:#141a22; --ink-2:#3a4450; --muted:#6b7480; --line:#e1dcd2; --line-2:#cfc8ba;
  --accent:#0e6b5c; --accent-2:#0a5245; --accent-soft:#e2f0ea; --gold:#b8860b; --gold-soft:#f6ecd2;
  --night:#0f151c; --night-2:#161e27; --night-ink:#eef1f4; --night-muted:#98a3ae; --night-line:#26303b;
  --danger:#a3324a; --warn:#8a5a00;
  --w:1120px; --radius:14px;
  --font:"Pretendard Variable",Pretendard,"Apple SD Gothic Neo","Noto Sans KR",-apple-system,BlinkMacSystemFont,system-ui,sans-serif;
  --mono:ui-monospace,"SF Mono",Menlo,Consolas,monospace;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--paper);color:var(--ink);font-family:var(--font);line-height:1.65;-webkit-font-smoothing:antialiased;word-break:keep-all;overflow-x:hidden}
a{color:inherit}
img,svg{max-width:100%}
.wrap{max-width:var(--w);margin:0 auto;padding:0 24px}
h1,h2,h3{letter-spacing:-.025em;line-height:1.18;margin:0}
p{margin:0}
strong{font-weight:700}
em{font-style:normal;color:var(--accent)}

/* 상단 정직 바 */
.topbar{background:var(--night);color:var(--night-muted);font-size:12.5px;text-align:center;padding:8px 16px;letter-spacing:.01em}
.topbar b{color:var(--night-ink);font-weight:600}

/* 내비 */
.nav{display:flex;align-items:center;justify-content:space-between;gap:20px;padding:18px 24px;position:sticky;top:0;z-index:20;background:color-mix(in srgb,var(--paper) 88%,transparent);backdrop-filter:saturate(1.4) blur(10px);border-bottom:1px solid transparent;transition:border-color .2s}
.nav.is-stuck{border-bottom-color:var(--line)}
.brand{display:inline-flex;align-items:center;gap:10px;text-decoration:none;font-weight:800;font-size:17px;letter-spacing:-.02em}
.brand-mark{width:28px;height:28px;border-radius:8px;background:var(--accent);color:#fff;display:grid;place-items:center;font-size:13px;font-weight:800}
.brand small{font-weight:500;color:var(--muted);font-size:12px;margin-left:2px}
.nav-links{display:flex;gap:22px;align-items:center;font-size:14px}
.nav-links a{text-decoration:none;color:var(--ink-2)}
.nav-links a:hover{color:var(--ink)}
.nav-cta{padding:9px 14px;border-radius:999px;background:var(--ink);color:#fff !important;font-weight:600}
@media (max-width:820px){.nav-links a:not(.nav-cta){display:none}}

/* 버튼 */
.btn{display:inline-flex;align-items:center;gap:8px;padding:14px 22px;border-radius:999px;text-decoration:none;font-weight:700;font-size:15px;line-height:1;transition:transform .15s,background .15s,box-shadow .15s}
.btn:active{transform:translateY(1px)}
.btn-primary{background:var(--accent);color:#fff;box-shadow:0 8px 22px -10px rgba(14,107,92,.7)}
.btn-primary:hover{background:var(--accent-2)}
.btn-secondary{background:transparent;color:var(--ink);border:1.5px solid var(--line-2)}
.btn-secondary:hover{border-color:var(--ink)}
.btn-light{background:#fff;color:var(--ink)}
.btn-light:hover{background:var(--paper-2)}

/* 히어로 */
.hero{position:relative;padding:72px 0 56px;overflow:hidden}
.hero::before{content:"";position:absolute;inset:0;background:
  radial-gradient(900px 480px at 88% 10%,rgba(14,107,92,.10),transparent 60%),
  radial-gradient(600px 400px at 10% 100%,rgba(184,134,11,.10),transparent 60%);pointer-events:none}
.hero-grid{display:grid;grid-template-columns:minmax(0,1.05fr) minmax(0,1fr);gap:48px;align-items:center;position:relative}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:12.5px;font-weight:700;letter-spacing:.14em;text-transform:uppercase;color:var(--accent);margin-bottom:18px}
.eyebrow::before{content:"";width:22px;height:2px;background:var(--accent)}
.hero h1{font-size:clamp(34px,4.6vw,58px);font-weight:800}
.hero h1 em{display:block}
.hero-copy{margin:22px 0 30px;font-size:17.5px;color:var(--ink-2);max-width:34em}
.hero-actions{display:flex;gap:12px;flex-wrap:wrap}
.hero-proof{margin-top:26px;font-size:13px;color:var(--muted);display:flex;gap:10px;align-items:center}
.hero-proof i{width:6px;height:6px;border-radius:50%;background:var(--accent);display:inline-block}
.hero-visual{position:relative}
.hero-visual svg{width:100%;height:auto;display:block}
.hero-caption{position:absolute;left:12px;bottom:8px;font-size:12px;color:var(--muted);background:color-mix(in srgb,var(--paper) 80%,transparent);padding:4px 8px;border-radius:6px}
@media (max-width:900px){.hero{padding:48px 0 40px}.hero-grid{grid-template-columns:1fr;gap:30px}.hero h1 em{display:inline}}

/* 입장 모션 */
.rise{opacity:0;transform:translateY(14px);animation:rise .7s cubic-bezier(.2,.7,.2,1) forwards}
.rise.d1{animation-delay:.08s}.rise.d2{animation-delay:.18s}.rise.d3{animation-delay:.28s}.rise.d4{animation-delay:.4s}
@keyframes rise{to{opacity:1;transform:none}}
/* 그래프 노드 점등 */
.g-node{opacity:.35;transition:opacity .4s}
.g-node.on{opacity:1}
.g-edge{stroke:var(--line-2);stroke-width:2;fill:none}
.g-edge.on{stroke:var(--accent)}
.g-gate{fill:#fff;stroke:var(--gold);stroke-width:2}
.g-gate.blocked{stroke:var(--danger);fill:#fbe9ee}
.g-pulse{animation:pulse 2.4s ease-in-out infinite}
@keyframes pulse{0%,100%{transform:scale(1)}50%{transform:scale(1.06)}}
@media (prefers-reduced-motion:reduce){.rise{animation:none;opacity:1;transform:none}.g-pulse{animation:none}.reveal{opacity:1 !important;transform:none !important}}

/* 섹션 */
.section{padding:88px 0}
.section.alt{background:var(--paper-2)}
.section.night{background:var(--night);color:var(--night-ink)}
.section.night .kicker{color:#7fd1bd}
.section.night .lead{color:var(--night-muted)}
.kicker{display:block;font-size:12.5px;font-weight:700;letter-spacing:.14em;text-transform:uppercase;color:var(--accent);margin-bottom:14px}
.section h2{font-size:clamp(28px,3.2vw,40px);font-weight:800;max-width:18em}
.lead{margin-top:16px;font-size:16.5px;color:var(--ink-2);max-width:38em}
.center{text-align:center}
.center h2,.center .lead{margin-left:auto;margin-right:auto}
.two{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:56px;align-items:start}
@media (max-width:900px){.section{padding:64px 0}.two{grid-template-columns:1fr;gap:32px}}

/* 스크롤 리빌 */
.reveal{opacity:0;transform:translateY(16px);transition:opacity .6s cubic-bezier(.2,.7,.2,1),transform .6s cubic-bezier(.2,.7,.2,1)}
.reveal.is-in{opacity:1;transform:none}

/* 다섯 질문 스트립 */
.five{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));border-top:1px solid var(--ink);margin-top:40px}
.five > div{padding:22px 18px 22px 0;border-right:1px solid var(--line);margin-right:18px}
.five > div:last-child{border-right:0;margin-right:0}
.five .q{font-family:var(--mono);font-size:12px;letter-spacing:.12em;color:var(--accent);font-weight:700}
.five h3{font-size:18px;margin:8px 0 6px}
.five p{font-size:14px;color:var(--muted)}
@media (max-width:900px){.five{grid-template-columns:repeat(2,1fr)}.five > div{border-right:0;border-bottom:1px solid var(--line);margin-right:0}}
@media (max-width:520px){.five{grid-template-columns:1fr}}

/* 인증 3층 사다리 */
.ladder{display:grid;gap:0;border-top:1px solid var(--ink)}
.rung{display:grid;grid-template-columns:120px minmax(0,1fr);gap:24px;padding:26px 0;border-bottom:1px solid var(--line);align-items:start;transition:background .2s}
.rung:hover{background:color-mix(in srgb,var(--accent-soft) 55%,transparent)}
.rung .lv{font-family:var(--mono);font-size:13px;letter-spacing:.1em;color:var(--accent);font-weight:700;padding-top:4px}
.rung .lv small{display:block;font-family:var(--font);letter-spacing:0;color:var(--muted);font-weight:500;margin-top:4px}
.rung h3{font-size:20px;margin-bottom:6px}
.rung p{font-size:15px;color:var(--ink-2)}
@media (max-width:600px){.rung{grid-template-columns:1fr;gap:6px}}
.formula{margin-top:28px;background:var(--night);color:var(--night-ink);border-radius:var(--radius);padding:22px 24px;font-family:var(--mono);font-size:14px;line-height:1.8;overflow-x:auto}
.formula .k{color:#7fd1bd}
.formula .op{color:#e2b85a}
.formula .c{color:var(--night-muted)}

/* 판정 기록(원장) 예시 */
.ledger{border:1px solid var(--night-line);border-radius:var(--radius);background:var(--night-2);overflow:hidden;font-size:14px}
.ledger .row{display:grid;grid-template-columns:110px minmax(0,1fr) 84px;gap:14px;padding:14px 18px;border-bottom:1px solid var(--night-line);align-items:center}
.ledger .row:last-child{border-bottom:0}
.ledger .who{font-family:var(--mono);font-size:12.5px;letter-spacing:.06em;color:#7fd1bd}
.ledger .what{color:var(--night-ink)}
.ledger .num{font-family:var(--mono);text-align:right;color:var(--night-muted)}
.ledger .head{background:rgba(255,255,255,.03);font-size:12px;letter-spacing:.1em;color:var(--night-muted);text-transform:uppercase}
.ledger .out{background:rgba(127,209,189,.08)}
.ledger .out .what{font-weight:700}
.ledger .out .who{color:#e2b85a}
.states{display:flex;flex-wrap:wrap;gap:8px;margin-top:22px}
.states span{font-family:var(--mono);font-size:12px;letter-spacing:.06em;padding:7px 11px;border:1px solid var(--night-line);border-radius:8px;color:var(--night-ink)}
.states span.hi{border-color:#7fd1bd;color:#7fd1bd}
.dims{margin:26px 0 0;padding:0;list-style:none;display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px 28px}
.dims li{display:flex;justify-content:space-between;gap:12px;font-size:14px;border-bottom:1px dashed var(--night-line);padding:8px 0}
.dims li b{font-weight:600;color:var(--night-ink)}
.dims li span{color:var(--night-muted);font-family:var(--mono);font-size:12px}
@media (max-width:600px){.dims{grid-template-columns:1fr}.ledger .row{grid-template-columns:90px 1fr 60px}}

/* 신선도 타임라인 */
.fresh{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:0;margin-top:40px;position:relative}
.fresh::before{content:"";position:absolute;left:0;right:0;top:11px;height:2px;background:var(--line-2)}
.fresh > div{position:relative;padding:34px 18px 0 0}
.fresh > div::before{content:"";position:absolute;left:0;top:4px;width:16px;height:16px;border-radius:50%;background:var(--paper-2);border:3px solid var(--line-2)}
.fresh > div.on::before{border-color:var(--accent);background:var(--accent)}
.fresh > div.warn::before{border-color:var(--gold)}
.fresh .st{font-family:var(--mono);font-size:12.5px;letter-spacing:.1em;color:var(--accent);font-weight:700}
.fresh h3{font-size:18px;margin:6px 0 6px}
.fresh p{font-size:14px;color:var(--muted)}
@media (max-width:720px){.fresh{grid-template-columns:1fr 1fr}.fresh::before{display:none}}

/* 학부모 네 질문 */
.qa{margin:28px 0 0;padding:0;list-style:none;counter-reset:q}
.qa li{counter-increment:q;display:grid;grid-template-columns:44px minmax(0,1fr);gap:14px;padding:18px 0;border-top:1px solid var(--line)}
.qa li::before{content:counter(q,decimal-leading-zero);font-family:var(--mono);font-size:13px;color:var(--accent);font-weight:700;padding-top:4px}
.qa h3{font-size:18px;margin-bottom:4px}
.qa p{font-size:14.5px;color:var(--ink-2)}

/* 정직 블록 */
.honest{display:grid;grid-template-columns:150px minmax(0,1fr);gap:36px;align-items:center;background:var(--night);color:var(--night-ink);border-radius:20px;padding:40px 44px}
.honest-badge{font-size:26px;font-weight:800;line-height:1.15;letter-spacing:-.03em;color:#e2b85a}
.honest h2{font-size:clamp(22px,2.4vw,28px);margin-bottom:12px;max-width:none}
.honest ul{margin:0;padding-left:18px;color:var(--night-muted);font-size:15px}
.honest li{margin:6px 0}
.honest li b{color:var(--night-ink);font-weight:600}
@media (max-width:720px){.honest{grid-template-columns:1fr;padding:28px 24px}}

/* CTA 밴드 */
.cta-band{margin:24px auto 0;display:grid;grid-template-columns:minmax(0,1fr) auto;gap:28px;align-items:center;background:var(--accent);color:#fff;border-radius:22px;padding:44px 48px}
.cta-band h2{color:#fff;font-size:clamp(24px,2.8vw,34px)}
.cta-band p{margin-top:10px;color:rgba(255,255,255,.82);font-size:15.5px}
.cta-actions{display:flex;gap:12px;flex-wrap:wrap}
@media (max-width:820px){.cta-band{grid-template-columns:1fr;padding:32px 26px}}

/* 역할 표 · 레이어 목록 · 폐회로 */
.roles{width:100%;border-collapse:collapse;margin-top:34px;font-size:15px}
.roles th,.roles td{text-align:left;padding:14px 12px;border-bottom:1px solid var(--line);vertical-align:top}
.roles th{font-size:12.5px;letter-spacing:.1em;text-transform:uppercase;color:var(--muted);font-weight:700;border-bottom:1px solid var(--ink)}
.roles td:first-child{font-weight:700;white-space:nowrap}
.roles td .tag{font-family:var(--mono);font-size:12px;letter-spacing:.08em;color:var(--accent);font-weight:700}
.roles tr.core td{background:var(--accent-soft)}
.roles-scroll{overflow-x:auto}
.layers{margin:36px 0 0;padding:0;list-style:none;border-top:1px solid var(--ink)}
.layers li{display:grid;grid-template-columns:64px 220px minmax(0,1fr);gap:20px;padding:20px 0;border-bottom:1px solid var(--line)}
.layers .ab{font-family:var(--mono);font-size:22px;font-weight:800;color:var(--accent);line-height:1}
.layers h3{font-size:17px}
.layers p{font-size:14.5px;color:var(--ink-2)}
@media (max-width:760px){.layers li{grid-template-columns:48px 1fr}.layers p{grid-column:2}}
.loop{display:flex;flex-wrap:wrap;gap:10px 0;margin-top:36px;align-items:center}
.loop span{padding:10px 14px;border:1px solid var(--night-line);border-radius:10px;font-size:14px;background:var(--night-2)}
.loop span.hi{border-color:#7fd1bd;color:#7fd1bd}
.loop i{font-style:normal;color:var(--night-muted);padding:0 8px}
.keep{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:28px;margin-top:36px}
.keep h3{font-size:17px;margin-bottom:6px}
.keep p{font-size:14.5px;color:var(--ink-2)}
.keep > div{border-top:2px solid var(--ink);padding-top:16px}
@media (max-width:760px){.keep{grid-template-columns:1fr}}
.phases{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:14px;margin-top:36px}
.phases > div{border-top:2px solid var(--line-2);padding-top:14px}
.phases > div.now{border-top-color:var(--accent)}
.phases > div.gate{border-top-color:var(--gold)}
.phases .ph{font-family:var(--mono);font-size:12px;letter-spacing:.1em;color:var(--muted);font-weight:700}
.phases > div.now .ph{color:var(--accent)}
.phases > div.gate .ph{color:var(--gold)}
.phases h3{font-size:15.5px;margin:6px 0 4px}
.phases p{font-size:13.5px;color:var(--muted)}
@media (max-width:900px){.phases{grid-template-columns:repeat(2,1fr)}}
@media (max-width:520px){.phases{grid-template-columns:1fr}}
.reasons{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:32px;margin-top:40px}
.reasons .n{font-family:var(--mono);font-size:13px;color:var(--accent);font-weight:700;letter-spacing:.1em}
.reasons h3{font-size:20px;margin:8px 0 8px}
.reasons p{font-size:15px;color:var(--ink-2)}
@media (max-width:820px){.reasons{grid-template-columns:1fr;gap:24px}}

/* 푸터 */
.footer{background:var(--night);color:var(--night-muted);padding:44px 0 36px;font-size:13px;margin-top:80px}
.footer-inner{display:flex;justify-content:space-between;gap:24px;flex-wrap:wrap;align-items:flex-start;padding-bottom:22px;border-bottom:1px solid var(--night-line);margin-bottom:18px}
.footer-inner strong{color:var(--night-ink);font-size:15px}
.footer-links{display:flex;gap:18px;flex-wrap:wrap}
.footer-links a{text-decoration:none;color:var(--night-muted)}
.footer-links a:hover{color:var(--night-ink)}
.footer-biz{line-height:1.8}
.footer-biz a{color:var(--night-muted)}
.footer-biz em{color:var(--night-muted);opacity:.8}