/* ============================================================
   CLASSKIT 클래스킷 — 학부모·교사 대상 교육 콘텐츠(시리즈) 소개·판매
   제안용 데모 · 정적 · 1단계(랜딩·무료체험·상담·소개) 중심

   [A. 도메인 레퍼런스] 실측/관찰 (2026.08)
     아이스크림(i-scream.co.kr) — 흰 배경 · NanumSquareNeo · 액센트 #ffcc00
       · radius 20(둥근·친근) · 교사 70% 사용 초등 교육 플랫폼
     티처빌/티처몰 · 쌤동네 — 교사 대상 교육 콘텐츠·쇼핑
   [B. 디자인 레퍼런스] 실측(이번 세션 · 메트릭 이식)
     Linear/Vercel — 음자간 디스플레이·모노 수치·정밀 간격
   → 크림/페이퍼 배경 + 테라코타(자료·따뜻함) + 스칼라 그린, 국내 교육 친근함(둥근 radius)
   ============================================================ */

:root{
  --bg:#FBF7F1;
  --bg-2:#F5EEE2;
  --surface:#FFFFFF;
  --ink:#262019;
  --ink-2:#5B534A;
  --muted:#948C82;
  --line:#EBE4D9;
  --line-2:#F2EDE4;
  --clay:#C4633A;           /* 액센트(자료·따뜻함) */
  --clay-dark:#A9502C;
  --clay-soft:#F8EAE1;
  --green:#4E9A6B;          /* 무료·좋음 */
  --green-soft:#E7F3EC;
  --gold:#E0A63C;           /* 별점·강조 */
  --gold-soft:#FBF0DA;
  --red:#D2544A; --red-soft:#FBEAE8;
  --blue:#3E77B0; --blue-soft:#E9F1F9;
  --r-8:8px; --r-12:12px; --r-16:16px; --r-20:20px; --r-99:999px;
  --ease:cubic-bezier(.22,.61,.36,1);
  --maxw:1180px;
  --font:'Pretendard Variable',Pretendard,-apple-system,BlinkMacSystemFont,'Apple SD Gothic Neo',sans-serif;
  --mono:'SFMono-Regular',ui-monospace,Menlo,Consolas,monospace;
  --sh:0 1px 2px rgba(38,32,25,.04),0 12px 30px -16px rgba(38,32,25,.18);
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;overflow-x:clip;-webkit-text-size-adjust:100%}
body{font-family:var(--font);background:var(--bg);color:var(--ink);font-size:15px;line-height:1.6;overflow-x:clip;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
button{font-family:inherit;cursor:pointer;border:none;background:none;color:inherit}
input,select,textarea{font-family:inherit;font-size:inherit;color:inherit}
img{max-width:100%;display:block}
::selection{background:var(--clay);color:#fff}
.mono{font-family:var(--mono);font-variant-numeric:tabular-nums}
.shell{max-width:var(--maxw);margin:0 auto;padding:0 clamp(16px,4vw,36px)}

.g-reveal{opacity:0;transform:translateY(20px);transition:opacity .7s var(--ease),transform .7s var(--ease)}
.g-reveal.is-visible{opacity:1;transform:none}
.mask{display:block;overflow:hidden}
.mask>span{display:block;transform:translateY(112%);transition:transform .9s var(--ease)}
.mask.is-visible>span{transform:none}
.mask.d1>span{transition-delay:.08s}
@media (prefers-reduced-motion:reduce){.g-reveal,.mask>span{opacity:1;transform:none;transition:none}}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-family:var(--mono);font-size:12px;font-weight:700;letter-spacing:.1em;text-transform:uppercase;color:var(--clay)}
.eyebrow::before{content:"";width:20px;height:1px;background:var(--clay)}

.btn{display:inline-flex;align-items:center;justify-content:center;gap:7px;height:46px;padding:0 22px;border-radius:var(--r-99);font-size:14.5px;font-weight:700;transition:.15s var(--ease);white-space:nowrap}
.btn-p{background:var(--clay);color:#fff}
.btn-p:hover{background:var(--clay-dark)}
.btn-g{background:var(--surface);border:1px solid var(--line);color:var(--ink)}
.btn-g:hover{border-color:var(--clay);color:var(--clay-dark)}
.btn-green{background:var(--green);color:#fff}
.btn-green:hover{filter:brightness(1.06)}
.btn-sm{height:36px;padding:0 15px;font-size:13px}
.btn-block{width:100%}

/* 헤더 */
.hd{position:sticky;top:0;z-index:80;background:rgba(251,247,241,.86);backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}
.hd-in{display:flex;align-items:center;gap:16px;height:62px}
.logo{display:flex;align-items:center;gap:9px;font-weight:800;letter-spacing:-.02em;font-size:18px}
.logo .mk{width:30px;height:30px;border-radius:10px;display:grid;place-items:center;background:var(--clay);color:#fff;font-size:15px;font-weight:900}
.logo small{font-size:11px;color:var(--muted);font-weight:600}
.hd-nav{display:flex;gap:2px;margin-left:8px}
.hd-nav a{padding:8px 12px;border-radius:var(--r-8);font-size:14px;color:var(--ink-2);transition:.15s}
.hd-nav a:hover{color:var(--ink);background:var(--bg-2)}
.hd-r{margin-left:auto;display:flex;gap:9px;align-items:center}
@media (max-width:880px){.hd-nav{display:none}}

/* 히어로 */
.hero{padding:clamp(40px,6vw,84px) 0 clamp(24px,4vw,48px)}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:clamp(28px,4vw,56px);align-items:center}
@media (max-width:920px){.hero-grid{grid-template-columns:1fr}}
.hero .badge-row{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:8px}
.tagpill{display:inline-flex;align-items:center;gap:5px;font-size:12px;font-weight:700;padding:5px 11px;border-radius:var(--r-99);background:var(--clay-soft);color:var(--clay-dark)}
.tagpill.green{background:var(--green-soft);color:#2f6b46}
.hero h1{font-size:clamp(2.2rem,5.2vw,3.9rem);font-weight:800;line-height:1.08;letter-spacing:-.03em;margin:12px 0 0}
.hero h1 .accent{color:var(--clay)}
.hero-sub{margin-top:18px;font-size:clamp(1rem,1.4vw,1.16rem);line-height:1.7;color:var(--ink-2);max-width:44ch}
.hero-cta{margin-top:24px;display:flex;gap:11px;flex-wrap:wrap}
.hero-trust{margin-top:22px;display:flex;gap:18px;flex-wrap:wrap;font-size:13px;color:var(--muted)}
.hero-trust b{color:var(--ink)}

/* 히어로 무료체험 카드 */
.trial-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-20);box-shadow:var(--sh);overflow:hidden}
.trial-top{padding:15px 18px;background:var(--clay-soft);border-bottom:1px solid var(--line);font-weight:800;font-size:14px;color:var(--clay-dark);display:flex;align-items:center;gap:7px}
.trial-body{padding:18px}
.fld{margin-bottom:12px}
.fld label{display:block;font-size:12.5px;font-weight:700;color:var(--ink-2);margin-bottom:5px}
.fld label .req{color:var(--clay)}
.fld input,.fld select,.fld textarea{width:100%;height:46px;border:1px solid var(--line);border-radius:var(--r-12);padding:0 13px;background:var(--surface)}
.fld textarea{height:auto;padding:11px 13px;min-height:84px;resize:vertical}
.fld input:focus,.fld select:focus,.fld textarea:focus{outline:2px solid var(--clay-soft);border-color:var(--clay)}
.fld .err{font-size:11px;color:var(--red);margin-top:4px;display:none}
.fld.bad input,.fld.bad select{border-color:var(--red)}
.fld.bad .err{display:block}
.consent{display:flex;align-items:flex-start;gap:9px;padding:12px;border:1px solid var(--line-2);border-radius:var(--r-12);background:var(--bg-2);margin-bottom:10px;cursor:pointer}
.consent input{margin-top:2px}
.consent .tx b{font-size:12.5px}.consent .tx span{font-size:11px;color:var(--muted);display:block;line-height:1.5;margin-top:1px}
.consent.guardian{background:var(--clay-soft);border-color:#EAD3C6}
.notify{margin-top:12px;padding:11px 13px;border-radius:var(--r-12);background:var(--green-soft);border:1px solid #CBE7D5;font-size:12px;color:#2f6b46;line-height:1.6;display:none}
.notify.show{display:block}

/* 섹션 */
.sec{padding:clamp(48px,7vw,90px) 0}
.sec-head{max-width:720px;margin-bottom:clamp(26px,3.5vw,44px)}
.sec-head h2{font-size:clamp(1.6rem,3.4vw,2.6rem);font-weight:800;letter-spacing:-.03em;line-height:1.12;margin-top:12px}
.sec-head p{margin-top:14px;font-size:clamp(.98rem,1.2vw,1.08rem);color:var(--ink-2);line-height:1.7}

/* ② statement */
.gbleed{width:100vw;margin-left:calc(50% - 50vw)}
.statement{position:relative;min-height:56vh;display:flex;align-items:flex-end;overflow:hidden;color:#fff;background:#241c16}
.statement-bg{position:absolute;inset:-14% 0;z-index:0}
.statement-bg img{width:100%;height:100%;object-fit:cover;will-change:transform}
.statement-bg::after{content:"";position:absolute;inset:0;background:linear-gradient(0deg,rgba(36,28,22,.92) 4%,rgba(36,28,22,.3) 52%,rgba(36,28,22,.5))}
.statement-in{position:relative;z-index:2;padding-block:clamp(48px,8vh,104px)}
.statement h2{font-size:clamp(1.9rem,5vw,3.4rem);font-weight:800;line-height:1.1;letter-spacing:-.03em;max-width:20ch}
.statement h2 .accent{color:#E9946A}
.statement p{margin-top:16px;max-width:52ch;font-size:clamp(1rem,1.4vw,1.14rem);line-height:1.75;color:#E9E1D6}

/* ① 카드 */
.pillars{display:grid;grid-template-columns:repeat(4,1fr);gap:clamp(12px,1.4vw,18px);perspective:1200px}
.pillar{position:relative;aspect-ratio:3/4;border-radius:var(--r-20);overflow:hidden;background:#241c16;transform:rotateX(var(--rx,0deg)) rotateY(var(--ry,0deg));transition:transform .5s var(--ease);transform-style:preserve-3d}
.pillar.tilting{transition:transform .08s linear}
.pillar img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;transform:scale(1.05);transition:transform .6s var(--ease)}
.pillar:hover img{transform:scale(1.12)}
.pillar::after{content:"";position:absolute;inset:0;background:linear-gradient(0deg,rgba(36,28,22,.92) 6%,rgba(36,28,22,.1) 60%,transparent);z-index:1}
.pillar-spot{position:absolute;inset:0;z-index:2;background:radial-gradient(220px circle at var(--mx,50%) var(--my,50%),rgba(196,99,58,.34),transparent 60%);opacity:0;transition:opacity .3s;mix-blend-mode:screen;pointer-events:none}
.pillar:hover .pillar-spot{opacity:1}
.pillar-body{position:absolute;inset:auto 0 0 0;z-index:3;padding:clamp(14px,1.6vw,20px);color:#fff;transform:translateZ(34px)}
.pillar-body .n{font-family:var(--mono);font-size:11px;font-weight:700;color:#E9946A}
.pillar-body h3{font-size:clamp(1.02rem,1.4vw,1.3rem);font-weight:800;margin:6px 0 5px}
.pillar-body p{font-size:12px;color:#E9E1D6;line-height:1.6;opacity:0;max-height:0;overflow:hidden;transition:opacity .35s,max-height .35s}
.pillar:hover .pillar-body p{opacity:1;max-height:120px}
@media (max-width:900px){.pillars{grid-template-columns:repeat(2,1fr)}}
@media (max-width:520px){.pillars{grid-template-columns:1fr}}

/* 시리즈 소개 카드 */
.series{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
@media (max-width:820px){.series{grid-template-columns:1fr}}
.scard{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-20);overflow:hidden;box-shadow:var(--sh);transition:.2s}
.scard:hover{transform:translateY(-3px)}
.scard .thumb{aspect-ratio:16/10;background:var(--bg-2);position:relative;overflow:hidden;display:grid;place-items:center;font-size:34px}
.scard .thumb .play{position:absolute;inset:0;display:grid;place-items:center;background:rgba(36,28,22,.28);color:#fff;font-size:34px;opacity:0;transition:.2s}
.scard:hover .thumb .play{opacity:1}
.scard .body{padding:16px 18px}
.scard .cat{font-size:11px;font-weight:800;color:var(--clay-dark);background:var(--clay-soft);padding:2px 8px;border-radius:var(--r-99)}
.scard h3{font-size:16px;font-weight:800;margin:9px 0 5px;letter-spacing:-.01em}
.scard p{font-size:12.5px;color:var(--ink-2);line-height:1.6}
.scard .foot{display:flex;align-items:center;gap:8px;margin-top:12px}
.scard .price{font-family:var(--mono);font-weight:800;color:var(--ink)}
.scard .stars{color:var(--gold);font-size:12px}
.scard .soon{margin-left:auto;font-size:11px;color:var(--muted)}

/* 폼(문의) 그리드 */
.forms{display:grid;grid-template-columns:1fr 1fr;gap:16px}
@media (max-width:820px){.forms{grid-template-columns:1fr}}
.formbox{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-20);box-shadow:var(--sh);overflow:hidden}
.formbox .ft{padding:15px 18px;border-bottom:1px solid var(--line-2);font-weight:800;font-size:14px;display:flex;align-items:center;gap:7px}
.formbox .fb{padding:18px}

/* 진단(콘텐츠 보호·환불) */
.tool{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-20);box-shadow:var(--sh);padding:clamp(18px,2.4vw,26px)}
.protect-demo{display:grid;grid-template-columns:1fr 1fr;gap:16px;align-items:start}
@media (max-width:760px){.protect-demo{grid-template-columns:1fr}}
.doc{border:1px solid var(--line);border-radius:var(--r-12);padding:16px;background:var(--bg-2);position:relative;overflow:hidden;min-height:150px}
.doc .line{height:8px;border-radius:4px;background:#DED6C8;margin-bottom:9px}
.doc .line.s{width:60%}
.doc .wm{position:absolute;inset:0;display:grid;place-items:center;font-family:var(--mono);font-size:15px;font-weight:800;color:rgba(196,99,58,.22);transform:rotate(-24deg);letter-spacing:.1em;pointer-events:none;opacity:0;transition:.3s}
.doc.on .wm{opacity:1}
.callout{margin-top:14px;padding:13px 15px;border-radius:var(--r-12);font-size:13px;line-height:1.65;border:1px solid var(--line)}
.callout.warn{background:var(--gold-soft);border-color:#F0DDB4;color:#8a5f18}
.callout.bad{background:var(--red-soft);border-color:#F1CCC8;color:#a53c34}
.callout.ok{background:var(--green-soft);border-color:#CBE7D5;color:#2f6b46}
.callout b{font-weight:800}

/* 리스크 */
.risks{display:grid;grid-template-columns:repeat(2,1fr);gap:15px}
@media (max-width:820px){.risks{grid-template-columns:1fr}}
.risk{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-20);padding:20px;position:relative;overflow:hidden;box-shadow:var(--sh)}
.risk::before{content:"";position:absolute;left:0;top:0;bottom:0;width:3px;background:var(--lvc,var(--clay))}
.risk .lv{display:inline-flex;align-items:center;gap:6px;font-family:var(--mono);font-size:10.5px;font-weight:800;letter-spacing:.04em;text-transform:uppercase;color:var(--lvc,var(--clay))}
.risk h3{font-size:15.5px;font-weight:800;margin:9px 0 7px;line-height:1.35}
.risk .d{font-size:13px;color:var(--ink-2);line-height:1.7}
.risk .d b{color:var(--ink)}
.risk .fix{margin-top:11px;padding:10px 12px;border-radius:var(--r-12);background:var(--clay-soft);font-size:12.5px;color:#8a3d20;line-height:1.6}
.risk .fix b{color:var(--clay-dark)}
.risk .src{margin-top:8px;font-size:11px;color:var(--muted);font-family:var(--mono);line-height:1.5;word-break:break-all}
.risk[data-lv=high]{--lvc:var(--red)}.risk[data-lv=mid]{--lvc:var(--gold)}.risk[data-lv=ok]{--lvc:var(--green)}

/* 관리자 접수 */
.admin{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-20);box-shadow:var(--sh);overflow:hidden}
.admin-top{display:flex;gap:10px;align-items:center;padding:13px 18px;border-bottom:1px solid var(--line-2);background:var(--ink);color:#fff}
.admin-top .t{font-weight:800;font-size:14px}.admin-top .tag{margin-left:auto;font-size:11px;color:#C7BEB2;font-family:var(--mono)}
.admin-body{padding:14px 18px}
.lead{display:flex;align-items:center;gap:11px;padding:11px 12px;border:1px solid var(--line-2);border-radius:var(--r-12);margin-bottom:8px}
.lead .kind{font-size:11px;font-weight:800;padding:3px 8px;border-radius:var(--r-99);flex-shrink:0}
.lead .kind.trial{background:var(--clay-soft);color:var(--clay-dark)}
.lead .kind.ask{background:var(--blue-soft);color:#2c608f}
.lead .kind.b2b{background:var(--gold-soft);color:#8a5f18}
.lead .info{flex:1;min-width:0;font-size:12.5px}
.lead .info .sub{font-size:11px;color:var(--muted)}
.lead .t{font-family:var(--mono);font-size:11px;color:var(--muted)}

/* 견적(단계별) */
.stages{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
@media (max-width:820px){.stages{grid-template-columns:1fr}}
.stage{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-20);padding:20px;box-shadow:var(--sh)}
.stage.primary{border-color:var(--clay);box-shadow:0 0 0 1px var(--clay),var(--sh)}
.stage .badge{display:inline-block;font-size:11px;font-weight:800;padding:3px 10px;border-radius:var(--r-99);background:var(--bg-2);color:var(--ink-2)}
.stage.primary .badge{background:var(--clay);color:#fff}
.stage h3{font-size:16px;font-weight:800;margin:10px 0 3px}
.stage .price{font-family:var(--mono);font-size:26px;font-weight:800;letter-spacing:-.02em;color:var(--clay-dark)}
.stage .price small{font-size:13px;color:var(--muted);font-weight:600}
.stage .price.ref{color:var(--muted)}
.stage ul{list-style:none;margin:14px 0 0;display:grid;gap:7px}
.stage li{font-size:12.5px;color:var(--ink-2);line-height:1.5;padding-left:18px;position:relative}
.stage li::before{content:"✓";position:absolute;left:0;color:var(--clay)}
.stage.ref li::before{content:"·";color:var(--muted)}
.est-note{margin-top:16px;font-size:11.5px;color:var(--muted);line-height:1.6}

/* 토스트 */
.toasts{position:fixed;left:50%;bottom:24px;transform:translateX(-50%);z-index:200;display:grid;gap:8px;width:min(440px,calc(100vw - 32px))}
.toast{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-12);padding:12px 15px;font-size:13px;line-height:1.5;box-shadow:0 16px 40px -14px rgba(38,32,25,.35);animation:tin .3s var(--ease)}
.toast b{color:var(--clay-dark)}
.toast.warn{border-color:#F0DDB4}.toast.warn b{color:#8a5f18}
.toast.err{border-color:#F1CCC8}.toast.err b{color:var(--red)}
.toast.ok{border-color:#CBE7D5}.toast.ok b{color:#2f6b46}
@keyframes tin{from{opacity:0;transform:translateY(10px)}}

.stat-row{display:flex;gap:clamp(16px,3vw,40px);flex-wrap:wrap;margin-top:6px}
.stat .v{font-family:var(--mono);font-size:clamp(1.5rem,2.6vw,2.1rem);font-weight:800;letter-spacing:-.02em}
.stat .v .u{font-size:.5em;color:var(--muted);margin-left:2px}
.stat .l{font-size:12px;color:var(--muted);margin-top:2px}
.stat .v.clay{color:var(--clay)}.stat .v.green{color:var(--green)}

.ft{border-top:1px solid var(--line);padding:40px 0 56px;margin-top:34px}
.ft-in{display:flex;flex-wrap:wrap;gap:22px;justify-content:space-between;align-items:flex-start}
.ft p{font-size:12.5px;color:var(--muted);line-height:1.7;max-width:48ch}
.ft .demo-tag{display:inline-block;margin-bottom:9px;font-family:var(--mono);font-size:11px;color:var(--clay-dark);border:1px solid var(--clay);border-radius:var(--r-99);padding:3px 10px}
.ft .legal{margin-top:8px;font-size:11px;color:var(--muted)}
.ft .legal a{text-decoration:underline}