/* 우리반 허브 소개(index.html) 전용 스타일. 공통은 site.css */
/* ── page: 첫 화면 ── */
.hero{position:relative;padding:clamp(28px,6vw,88px) 0 clamp(64px,8vw,112px);overflow:hidden}
/* 모눈 공책 느낌의 옅은 점 격자(가장자리로 갈수록 사라짐) */
.hero::before{content:"";position:absolute;inset:0;background-image:radial-gradient(#20201d1f 1.2px,transparent 1.3px);background-size:22px 22px;-webkit-mask-image:radial-gradient(ellipse 70% 70% at 70% 40%,#000 20%,transparent 75%);mask-image:radial-gradient(ellipse 70% 70% at 70% 40%,#000 20%,transparent 75%);pointer-events:none}
.hero__grid{position:relative;display:grid;gap:clamp(36px,5vw,64px);align-items:center}
.pill{display:inline-flex;align-items:center;gap:8px;min-height:34px;padding:4px 14px 4px 6px;border-radius:999px;background:var(--paper);box-shadow:0 0 0 1px var(--line);font-size:14px;font-weight:700;color:var(--muted)}
.pill b{display:inline-flex;align-items:center;min-height:24px;padding:0 10px;border-radius:999px;background:var(--note);color:var(--note-ink);font-size:13px}
.hero h1{margin-top:20px;font-size:clamp(38px,6vw,72px);line-height:1.12}
.hero h1 span{display:block}
.hero h1 em{font-style:normal;color:var(--teacher);background:linear-gradient(transparent 66%,#cfe0f7 66%,#cfe0f7 94%,transparent 94%)}
.hero .lead{margin-top:22px}
.cta{display:flex;flex-wrap:wrap;gap:12px;margin-top:32px}
.facts{list-style:none;margin:28px 0 0;padding:0;display:flex;flex-wrap:wrap;gap:8px 18px;font-size:15px;font-weight:600;color:var(--muted)}
.facts li{display:inline-flex;align-items:center;gap:7px}
.facts svg{color:var(--student)}
.duo{position:relative;display:flex;justify-content:center;align-items:flex-start;padding:8px 0 20px}
.duo::before{content:"";position:absolute;inset:6% 4% 0;border-radius:44% 56% 50% 50%/50% 46% 54% 50%;background:radial-gradient(circle at 30% 35%,#c9dbf6 0,transparent 60%),radial-gradient(circle at 72% 62%,#c3e7de 0,transparent 58%);filter:blur(6px);z-index:-1}
.hero__visual{position:relative;z-index:0}
.duo .device{--w:min(43vw,270px)}
/* 두 화면을 살짝 겹쳐 기울인다. 틀만 움직이고 설명 글(figcaption)은 같은 높이에 둔다 */
.duo .device:first-child{margin-right:calc(var(--w)*-.1);z-index:1}
.duo .device:first-child .device__body{transform:translateY(32px) rotate(-4deg)}
.duo .device:nth-child(2){z-index:2}
.duo .device:nth-child(2) .device__body{transform:rotate(3deg)}
.duo figcaption{margin-top:52px}
@media (max-width:599px){
  .hero h1{margin-top:16px}
  .hero .lead{margin-top:16px}
  .cta{margin-top:24px}
  .cta .btn{flex:1 1 0;padding:12px 10px;font-size:16px}
  .cta .btn--wide{flex-basis:100%}
  .facts{margin-top:20px;gap:4px 14px;font-size:14px}
  /* 좁은 화면: 학생 화면 하나를 크게 */
  .duo .device:first-child{display:none}
  .duo .device{--w:min(72vw,300px)}
  .duo .device:nth-child(2) .device__body{transform:none}
  .duo figcaption{margin-top:16px}
}
@media (min-width:1024px){.hero__grid{grid-template-columns:1.05fr 1fr}.hero h1 span{white-space:nowrap}}
/* 웹 글꼴이 늦게 바뀌면 왼쪽 글 칸 높이가 달라져, 가운데 맞춤이던 오른쪽 기기 그림이 통째로 밀렸다(PC CLS 0.47~0.62). 위쪽 맞춤으로 그림을 고정한다. */
@media (min-width:1024px){.hero__grid{align-items:start}}
/* 2026-09-27 노트북(1280·1366) 최적화: 72px 제목을 한 줄로 두면 왼쪽 칸이 넓어져 휴대폰 그림이 오른쪽 밖으로 잘렸다 — 제목을 화면 폭에 맞추고 칸이 서로 밀지 않게 */
@media (min-width:1024px){.hero h1{font-size:clamp(40px,4.4vw,64px)}.hero h1 span{white-space:normal}.hero__grid>*{min-width:0}} /* 넓은 화면에서 한 줄로 묶으면 칸 밖으로 넘쳐 휴대폰 그림 밑으로 들어간다 — 칸이 좁으면 줄바꿈 */
/* 높이가 낮은 노트북 화면(720~820px): 첫 화면이 한 화면에 들어오게 여백과 휴대폰 그림을 줄인다 */
@media (min-width:1024px) and (max-height:820px){.hero{padding:24px 0 48px}.hero h1{margin-top:14px}.hero .lead{margin-top:16px}.cta{margin-top:22px}.facts{margin-top:18px}.duo .device{--w:min(19vw,225px)}.duo figcaption{margin-top:36px}}

/* ── 걱정 해소 띠: 게시판에 자석으로 붙인 쪽지 ── */
.worry{padding:0 0 clamp(64px,8vw,104px)}
.worry ul{list-style:none;margin:0;padding:0;display:grid;gap:28px 20px}
.worry li{position:relative;background:var(--paper);border-radius:var(--r);padding:30px 24px 24px;box-shadow:var(--shadow-card),0 0 0 1px var(--line)}
.worry li::before{content:"";position:absolute;top:-11px;left:24px;width:24px;height:24px;border-radius:50%;background:var(--m);box-shadow:2px 4px 0 #20201d33,inset 4px 5px 0 #ffffff55,inset -4px -6px 0 #0003}
.worry h3{font-size:20px}
/* 작은 문구는 본문 보조색으로 읽히게(자석 노랑은 대비 1.59:1). 자석 색은 위 동그라미에만 쓴다. */
.worry h3 small{display:block;font-size:13px;font-weight:700;color:var(--muted);letter-spacing:.02em;margin-bottom:4px}
.worry p{margin-top:8px;color:var(--muted);font-size:16px}
@media (min-width:760px){.worry ul{grid-template-columns:repeat(3,1fr)}.worry li:nth-child(2){transform:translateY(10px)}}

/* ── 하루 흐름: 예시 하루를 화면과 시간 순서로 ── */
.feature{display:grid;gap:clamp(32px,5vw,72px);align-items:center}
.feature+.feature{margin-top:clamp(64px,8vw,112px)}
.stage{position:relative;display:grid;place-items:center;padding:clamp(28px,5vw,52px) 16px;border-radius:var(--r-lg);background:var(--tint);overflow:hidden}
.stage::before{content:"";position:absolute;inset:0;background-image:radial-gradient(#ffffff99 1.2px,transparent 1.3px);background-size:20px 20px;opacity:.7}
.stage .device{--w:min(68vw,280px);position:relative}
.when{display:inline-flex;align-items:center;gap:10px;font-family:var(--font-display);font-size:22px;line-height:1.2;color:var(--accent)}
.when b{display:inline-grid;place-items:center;width:36px;height:36px;border-radius:50%;background:var(--accent);color:#fff;font-size:18px;font-weight:400}
.feature__text h3{font-family:var(--font-display);font-weight:400;font-size:clamp(26px,3vw,36px);line-height:1.28;margin-top:14px;letter-spacing:-.01em}
.tl{list-style:none;margin:24px 0 0;padding:0}
.tl li{position:relative;padding:0 0 20px 30px}
.tl li::before{content:"";position:absolute;left:3px;top:5px;width:12px;height:12px;border-radius:50%;background:var(--paper);box-shadow:0 0 0 3px var(--accent)}
.tl li:not(:last-child)::after{content:"";position:absolute;left:8px;top:24px;bottom:4px;width:2px;background:repeating-linear-gradient(var(--line-strong) 0 5px,transparent 5px 10px)}
.tl li:last-child{padding-bottom:0}
.tl p{margin-top:6px;color:var(--muted);font-size:16px}
.tl .tag--sys{background:var(--paper-2);color:var(--muted)}
@media (min-width:900px){.feature{grid-template-columns:1fr 1fr}.feature--flip .stage{order:2}}
.day-note{margin-top:clamp(48px,6vw,72px);text-align:center;font-size:14px;color:var(--muted)}

/* ── 비교: 학급 소통 방법 종류별 vs 우리반 허브 ── */
.edge{list-style:none;margin:0 0 clamp(28px,4vw,44px);padding:0;display:grid;gap:14px;grid-template-columns:1fr}
.edge li{position:relative;padding:24px 22px 20px;background:var(--paper);border-radius:var(--r);box-shadow:var(--shadow-card),0 0 0 1px var(--line);overflow:hidden}
.edge li::before{content:"";position:absolute;inset:0 0 auto;height:4px;background:var(--board)}
.edge__no{display:block;font-size:13px;font-weight:800;letter-spacing:.08em;color:var(--frame);margin-bottom:6px}
.edge h3{margin:0 0 6px;font-size:18px;font-weight:800;line-height:1.4}
.edge p{margin:0;font-size:15px;line-height:1.6;color:var(--muted)}
@media (min-width:600px){.edge{grid-template-columns:repeat(2,1fr)}}
@media (min-width:1024px){.edge{grid-template-columns:repeat(4,1fr)}}
.compare{width:100%;border-collapse:separate;border-spacing:0;background:var(--paper);border-radius:var(--r-lg);box-shadow:var(--shadow-card),0 0 0 1px var(--line);overflow:hidden;font-size:16px}
.compare th,.compare td{padding:16px 18px;vertical-align:middle;border-bottom:1px solid var(--line);line-height:1.55}
.compare tbody tr:last-child>*{border-bottom:0}
.compare thead th{font-size:14.5px;font-weight:800;background:var(--paper-2);color:var(--muted);text-align:center}
.compare thead th.us{background:var(--board);color:var(--chalk);text-align:left}
.compare thead th.us img{display:inline-block;width:22px;height:22px;border-radius:6px;vertical-align:-5px;margin-right:8px}
.compare tbody th{width:24%;text-align:left;font-weight:800}
.compare td{text-align:center;width:12%}
.compare td.us{width:34%;text-align:left;background:#eef4f0;color:var(--text);font-weight:600}
.compare td.us .m{margin-right:10px;vertical-align:-1px}
/* 기호: 색만으로 구분하지 않도록 모양(○△✕)도 다르게 둔다 */
.m{display:inline-flex;align-items:center;justify-content:center;width:30px;height:30px;border-radius:50%;font-size:15px;font-weight:800;line-height:1;flex:none}
.m--yes{background:var(--student-soft);color:var(--student)}
.m--some{background:var(--notice-soft);color:var(--notice)}
.m--no{background:#f5e7e3;color:#8f3a2b}
.m--us{background:var(--board);color:var(--chalk)}
.compare-legend{display:flex;flex-wrap:wrap;justify-content:center;gap:10px 22px;margin:20px 0 0;font-size:14.5px;color:var(--muted)}
.compare-legend span{display:inline-flex;align-items:center;gap:8px}
.compare-legend .m{width:24px;height:24px;font-size:12.5px}
.compare-note{margin:12px auto 0;max-width:42em;text-align:center;font-size:14px;color:var(--muted)}
@media (max-width:759px){
  .compare thead{display:none}
  .compare,.compare tbody{display:block}
  .compare tr{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;padding:18px;border-bottom:1px solid var(--line)}
  .compare tbody tr:last-child{border-bottom:0}
  .compare th,.compare td{display:block;width:auto;padding:0;border:0}
  .compare tbody th{grid-column:1/-1;width:auto;font-size:17px;margin-bottom:2px}
  .compare td:not(.us){display:flex;flex-direction:column;align-items:center;gap:6px;padding:10px 4px;border-radius:12px;background:var(--canvas)}
  .compare td:not(.us)::before{content:attr(data-label);font-size:12px;font-weight:700;color:var(--muted);text-align:center;line-height:1.3;word-break:keep-all}
  .compare td.us{grid-column:1/-1;width:auto;display:flex;align-items:center;padding:12px 14px;border-radius:12px;font-size:15.5px}
  .compare td.us .m{margin-right:12px}
}

/* ── 화면 줄(strip): 휴대폰 화면 여러 장을 가로로. 넘치면 옆으로 넘겨 본다(키보드: 초점 후 좌우 화살표) ── */
.strip{display:flex;justify-content:safe center;gap:clamp(16px,2.2vw,28px);overflow-x:auto;scroll-snap-type:x mandatory;padding:10px 16px 60px;margin:0 -16px -30px;overscroll-behavior-x:contain;scrollbar-width:thin;scrollbar-color:var(--line-strong) transparent;border-radius:var(--r)}
.strip .device{--w:min(62vw,236px);scroll-snap-align:center}
.strip figcaption{font-size:14px;line-height:1.5}
.strip figcaption b{color:var(--teacher)}
.strip--center{justify-content:safe center}
.strip:focus-visible{outline-offset:-3px}
.strip-hint{margin:8px 0 0;text-align:center;font-size:13px;font-weight:700;color:var(--muted)}
@media (min-width:1024px){.strip-hint{display:none}.strip-hint--always{display:block}.show__panel .strip-hint{grid-column:2}}

/* ── 할 수 있는 일: 네 묶음 탭 + 실제 화면 ── */
.show__tabs{display:none}
.has-js .show__tabs{display:grid;grid-template-columns:repeat(4,1fr);gap:4px;max-width:640px;margin:0 auto clamp(24px,4vw,40px);padding:5px;border-radius:16px;background:var(--paper-2);box-shadow:inset 0 0 0 1px var(--line)}
.show__tab{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:2px;min-height:58px;padding:6px 4px;border:0;border-radius:12px;background:transparent;color:var(--muted);font:inherit;font-size:16px;font-weight:800;line-height:1.2;cursor:pointer;transition:background .15s,color .15s}
.show__tab small{font-size:12px;font-weight:700}
.show__tab:hover{color:var(--text)}
.show__tab[aria-selected="true"]{background:var(--paper);color:var(--accent);box-shadow:0 1px 2px rgba(32,32,29,.1),0 0 0 1px var(--line)}
.show__tab:focus-visible{outline-offset:-3px}
.show__panel{display:grid;gap:clamp(24px,4vw,48px);align-items:center;padding:clamp(20px,3.4vw,44px);border-radius:var(--r-lg);background:var(--tint)}
.show__panel+.show__panel{margin-top:24px}
.show__panel[hidden]{display:none}
.show__text h3{display:flex;flex-wrap:wrap;align-items:center;gap:10px 12px;font-family:var(--font-display);font-weight:400;font-size:clamp(26px,2.8vw,32px);line-height:1.2}
.show__text h3 .ico{flex:none;width:42px;height:42px;border-radius:12px;display:grid;place-items:center;background:var(--paper);color:var(--accent)}
.show__text h3 small{font-family:var(--font-body);font-size:13px;font-weight:800;color:var(--accent);background:var(--paper);padding:3px 10px;border-radius:999px;letter-spacing:0}
.show__lead{margin-top:12px;color:var(--muted)}
.show__text dl{margin:18px 0 0;padding:2px 18px;border-radius:var(--r);background:var(--paper);box-shadow:0 0 0 1px var(--line)}
.show__text dl div{padding:11px 0;border-top:1px solid var(--line)}
.show__text dl div:first-child{border-top:0}
.show__text dt{font-weight:800;font-size:15.5px;line-height:1.5}
.show__text dd{margin:2px 0 0;color:var(--muted);font-size:15px;line-height:1.6}
.show__panel .strip{align-self:center}
@media (min-width:1024px){.show__panel{grid-template-columns:.95fr 1.05fr}.show__panel .strip .device{--w:min(20vw,236px)}}

/* ── 첫날 시작 ── */
.steps{list-style:none;margin:0 0 clamp(32px,4vw,48px);padding:0;display:grid;gap:4px;counter-reset:s}
.steps li{counter-increment:s;position:relative;display:grid;grid-template-columns:48px 1fr;gap:18px;padding:0 0 26px}
.steps li::before{content:counter(s);display:grid;place-items:center;width:48px;height:48px;border-radius:50%;background:var(--teacher);color:#fff;font-family:var(--font-display);font-size:22px;box-shadow:0 0 0 6px var(--paper),0 0 0 7px var(--line)}
.steps li:not(:last-child)::after{content:"";position:absolute;left:23px;top:56px;bottom:0;width:2px;background:repeating-linear-gradient(var(--line-strong) 0 6px,transparent 6px 12px)}
.steps li:last-child{padding-bottom:0}
.steps li:last-child::before{background:var(--notice)}
.steps h3{font-size:19px;padding-top:9px}
.steps p{margin-top:4px;color:var(--muted)}
@media (min-width:1024px){
  .steps{grid-template-columns:repeat(4,1fr);gap:28px}
  .steps li{grid-template-columns:1fr;align-content:start;gap:0;padding:0}
  .steps li:not(:last-child)::after{left:64px;right:-20px;top:23px;bottom:auto;width:auto;height:2px;background:repeating-linear-gradient(90deg,var(--line-strong) 0 6px,transparent 6px 12px)}
  .steps h3{padding-top:16px}
}
.tipnote{max-width:760px;margin:28px auto 0;display:flex;gap:14px;align-items:flex-start;padding:18px 20px;border-radius:var(--r);background:var(--teacher-soft);color:#1d3f75}
.tipnote svg{flex:none;margin-top:2px}
.tipnote strong{display:block;font-size:16px}
.tipnote p{font-size:15px;margin-top:2px}

/* ── 안심하고 쓰기 ── */
.safe-grid{list-style:none;margin:0;padding:0;display:grid;gap:16px}
.safe-grid li{display:grid;grid-template-columns:48px 1fr;gap:16px;align-items:start;background:var(--canvas);border-radius:var(--r);padding:22px;box-shadow:0 0 0 1px var(--line)}
.safe-grid .ico{width:48px;height:48px;border-radius:14px;display:grid;place-items:center;background:var(--student-soft);color:var(--student)}
.safe-grid h3{font-size:18px}
.safe-grid p{margin-top:4px;color:var(--muted);font-size:15.5px}
@media (min-width:760px){.safe-grid{grid-template-columns:1fr 1fr}}
@media (min-width:1100px){.safe-grid{grid-template-columns:repeat(3,1fr)}.safe-grid li{grid-template-columns:1fr;align-content:start}}
/* 솔직한 한 줄: 노란 쪽지 + 테이프 */
.honest{position:relative;margin-top:40px;padding:26px 24px 24px;background:var(--note);color:var(--note-ink);border-radius:6px;box-shadow:3px 6px 0 #20201d18;transform:rotate(-.4deg)}
.honest::before{content:"";position:absolute;top:-12px;left:50%;width:96px;height:24px;margin-left:-48px;background:#e9d9a8cc;border-radius:3px;transform:rotate(2deg);box-shadow:0 1px 2px #0001}
.honest h3{font-family:var(--font-display);font-weight:400;font-size:22px;color:var(--note-ink)}
.honest ul{margin:10px 0 0;padding-left:1.2em}
.honest li+li{margin-top:4px}
@media (min-width:900px){.honest{max-width:760px;margin-left:auto;margin-right:auto;padding:30px 36px 28px}}

/* ── 시범 운영 참여 안내 ── */
.draft-note{display:inline-block;margin-top:14px;padding:4px 12px;border-radius:8px;background:var(--note);color:var(--note-ink);font-size:14px;font-weight:700}
.pilot{display:grid;gap:clamp(36px,5vw,64px);align-items:start}
.promise{list-style:none;margin:28px 0 0;padding:0;display:grid;gap:12px}
.promise li{display:grid;grid-template-columns:28px 1fr;gap:12px;align-items:start;font-weight:600}
.promise svg{color:var(--student);margin-top:2px}
.pilot .cta{margin-top:32px}
.plan{background:var(--paper);border-radius:var(--r-lg);padding:clamp(22px,3vw,36px);box-shadow:var(--shadow-card),0 0 0 1px var(--line)}
.plan h3{font-size:18px}
.weeks{list-style:none;margin:16px 0 0;padding:0;display:grid;grid-template-columns:repeat(6,1fr);gap:0;border-radius:8px;overflow:hidden;box-shadow:inset 0 0 0 1px var(--line)}
.weeks li+li{border-left:1px solid #ffffff99}
.weeks li{display:grid;place-items:center;min-height:30px;border-radius:0;font-size:13px!important;background:var(--paper-2);color:var(--muted);font-weight:800;font-size:14px}
.weeks li.on{background:var(--teacher);color:#fff}
.weeks-key{list-style:none;margin:14px 0 0;padding:0;display:grid;gap:8px;font-size:15px}
.weeks-key li{display:grid;grid-template-columns:14px 1fr;gap:10px;align-items:start}
.weeks-key i{width:14px;height:14px;border-radius:4px;margin-top:5px;background:var(--paper-2);box-shadow:inset 0 0 0 1px var(--line-strong)}
.weeks-key li:last-child i{background:var(--teacher);box-shadow:none}
.plan dl{margin:24px 0 0;display:grid;gap:0}
.plan dl div{display:grid;grid-template-columns:5.5em 1fr;gap:12px;padding:12px 0;border-top:1px solid var(--line)}
.plan dt{font-weight:800;color:var(--muted);font-size:15px}
.plan dd{margin:0;font-size:15.5px}
@media (min-width:1024px){.pilot{grid-template-columns:.95fr 1.05fr}}

/* ── 자주 묻는 질문 ── */
.faq-wrap{display:grid;gap:40px}
.faq h3{margin:28px 0 6px;font-size:14px;font-weight:800;letter-spacing:.04em;color:var(--teacher)}
.faq h3:first-child{margin-top:0}
.faq details{border-bottom:1px solid var(--line-strong)}
.faq h3+details{border-top:1px solid var(--line-strong)}
.faq summary{list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:60px;padding:14px 4px;font-weight:800;font-size:17.5px;line-height:1.5}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"";flex:none;width:28px;height:28px;border-radius:50%;background:var(--paper) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='14' height='14' viewBox='0 0 14 14'%3E%3Cpath d='M7 2v10M2 7h10' stroke='%232c63b8' stroke-width='2' stroke-linecap='round'/%3E%3C/svg%3E") center/14px no-repeat;box-shadow:0 0 0 1px var(--line);transition:transform .25s var(--ease)}
.faq details[open] summary::after{transform:rotate(45deg)}
.faq summary:hover{color:var(--teacher)}
.faq details p{padding:0 44px 22px 4px;color:var(--muted)}
@media (min-width:1024px){.faq-wrap{grid-template-columns:.8fr 1.2fr;gap:64px;align-items:start}.faq-wrap .head{position:sticky;top:calc(var(--header-h) + 32px);margin-bottom:0}}

/* ── page: 함께 쓰는 교실 도구(뽑기 시간 카드) ── */
.tool-card{display:grid;overflow:hidden;border-radius:var(--r-lg);background:var(--board);color:var(--chalk);text-decoration:none;box-shadow:0 24px 48px -28px rgba(20,38,31,.7);transition:transform .2s var(--ease)}
.tool-card:hover{transform:translateY(-3px)}
.tool-card:focus-visible{outline-offset:4px}
.tool-card__img{display:block;padding:clamp(22px,2.6vw,30px);background:radial-gradient(ellipse at 48% 38%,#2e5548,#1f3b32)}
.tool-card__img img{width:100%;height:auto;border-radius:10px;box-shadow:0 0 0 6px #8a5a33,0 0 0 8px #5e3b1e}
.tool-card__body{display:flex;flex-direction:column;justify-content:center;gap:10px;padding:clamp(22px,3vw,40px)}
.tool-card__kicker{font-size:14px;font-weight:700;color:#cfdad4}
.tool-card__body strong{font-family:var(--font-display);font-weight:400;font-size:clamp(30px,3.4vw,42px);line-height:1.15;color:#fff}
.tool-card__body .d{font-size:17px;color:#e6ece8}
.tool-card__more{display:inline-flex;align-items:center;gap:8px;align-self:flex-start;min-height:48px;margin-top:8px;padding:10px 20px;border-radius:12px;background:var(--magnet-yellow);color:#1e2b26;font-weight:800;box-shadow:0 4px 0 #c7a344}
@media (min-width:900px){.tool-card{grid-template-columns:1.15fr 1fr}}

/* ── page: 마무리(파란 칠판) ── */
.closing{padding:0 0 var(--section-y)}
.closing h2 span{white-space:nowrap}
.closing__panel{position:relative;overflow:hidden;border-radius:var(--r-lg);background:radial-gradient(ellipse at 20% 0%,#3a74cc,transparent 60%),linear-gradient(160deg,#2c63b8,#1f4c93);color:#fff;padding:clamp(40px,6vw,80px) clamp(24px,5vw,72px);text-align:center;box-shadow:0 30px 60px -30px rgba(31,76,147,.7)}
.closing__panel::before{content:"";position:absolute;inset:0;background-image:radial-gradient(#ffffff26 1.2px,transparent 1.3px);background-size:22px 22px;-webkit-mask-image:linear-gradient(#000,transparent 80%);mask-image:linear-gradient(#000,transparent 80%)}
.closing__panel>*{position:relative}
.closing h2{font-size:clamp(30px,4.4vw,52px);line-height:1.2}
.closing p{margin:16px auto 0;max-width:34em;color:rgba(255,255,255,.9);font-size:clamp(16px,1.5vw,19px)}
.closing .cta{justify-content:center}
@media (max-width:599px){.closing .cta .btn{flex:1 1 100%}}
.btn--white{background:#fff;color:var(--teacher-deep);box-shadow:0 4px 0 #0f2f63}
.btn--white:hover{background:#f1f5fc}
.btn--white:active{transform:translateY(3px);box-shadow:0 1px 0 #0f2f63}
.btn--line{background:transparent;color:#fff;border-color:#ffffff8c}
.btn--line:hover{background:#ffffff14;border-color:#fff}
.closing :focus-visible{outline-color:#fff}
.closing .small{margin-top:20px;font-size:14px;color:#e3ecfa}