/* 시험 특훈 — 공통 스타일 (흰 배경 고정)
   방향: 밝은 하늘색 그라데이션 히어로 + 굵은 헤드라인 + 흰 카드 */
:root{
  color-scheme:light;
  --bg:#FFFFFF; --ink:#0F1A2B; --muted:#5A6678; --line:#E3E9F0; --soft:#F2F6FA;
  --sky:#1EA7E4; --sky-d:#0E86C2; --sky-soft:#E3F4FC; --mint:#5FD3C0;
  --ok:#1F8A5B; --warn:#B26A00; --bad:#D2402F;
  --f-head:"Noto Sans KR",system-ui,-apple-system,sans-serif;
  --f-body:"Noto Sans KR",system-ui,-apple-system,sans-serif;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
@media (prefers-reduced-motion: reduce){html{scroll-behavior:auto}}
body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--f-body);font-size:16px;line-height:1.6;-webkit-tap-highlight-color:transparent}
a{color:inherit}
button,input{font:inherit;color:inherit}
button{cursor:pointer}
:focus-visible{outline:3px solid var(--sky);outline-offset:2px}
h1,h2,h3{text-wrap:balance;margin:0}
[hidden]{display:none!important}
.inner{max-width:1120px;margin:0 auto;padding-left:max(20px,env(safe-area-inset-left,0px));padding-right:max(20px,env(safe-area-inset-right,0px))}

/* 상단 바 */
.nav{position:sticky;top:0;z-index:20;background:rgba(255,255,255,.86);-webkit-backdrop-filter:saturate(1.4) blur(10px);backdrop-filter:saturate(1.4) blur(10px);border-bottom:1px solid transparent;padding-top:env(safe-area-inset-top,0px)}
.nav.scrolled{border-bottom-color:var(--line)}
.nav .inner{display:flex;align-items:center;justify-content:space-between;gap:12px;height:64px}
.logo{display:flex;align-items:center;gap:8px;text-decoration:none;font-family:var(--f-head);font-weight:900;font-size:21px;color:var(--sky);letter-spacing:-.02em}
.logo{gap:10px;align-items:center}
.msp{font-family:"Montserrat","Noto Sans KR",sans-serif;font-weight:800;font-size:28px;line-height:1;letter-spacing:.01em;color:#1D8FE0}
.lname{font-family:"Montserrat","Noto Sans KR",sans-serif;font-weight:700;font-size:14px;letter-spacing:.08em;color:var(--ink);padding-left:10px;border-left:2px solid var(--line);line-height:1.1}
@media(max-width:480px){.msp{font-size:24px}.lname{font-size:11px;letter-spacing:.05em;padding-left:8px}}
.logo{white-space:nowrap;flex:none}
.who button{white-space:nowrap}
@media(max-width:480px){.who .lab{display:none}.nav .inner{height:58px}}
.nav-actions{display:flex;gap:8px;align-items:center;min-width:0}
.btn{border:none;border-radius:12px;padding:10px 16px;font-weight:700;font-size:15px;text-decoration:none;display:inline-flex;align-items:center;justify-content:center;gap:8px;white-space:nowrap}
.btn-soft{background:var(--soft);color:var(--ink)}
.btn-sky{background:var(--sky);color:#fff}
.btn-sky:hover{background:var(--sky-d)}
.btn-dark{background:var(--ink);color:#fff}
.who{display:flex;align-items:center;gap:8px;background:var(--soft);border-radius:12px;padding:6px 6px 6px 12px;font-size:14px;font-weight:700;min-width:0}
.who span{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.who button{border:none;background:#fff;border-radius:9px;padding:5px 10px;font-size:13px;font-weight:700;color:var(--muted)}

/* 히어로 */
.hero{position:relative;overflow:hidden;background:
  radial-gradient(60% 80% at 15% 85%,rgba(126,200,255,.35),transparent 70%),
  radial-gradient(55% 70% at 85% 20%,rgba(95,211,192,.22),transparent 70%),
  linear-gradient(180deg,#F7FBFF 0%,#EAF6FD 100%)}
.hero .inner{display:grid;grid-template-columns:1.05fr .95fr;gap:40px;align-items:center;padding-block:28px 28px}
@media(max-width:860px){.hero .inner{grid-template-columns:1fr;padding-block:22px 22px;gap:20px}}
.eyebrow{display:inline-block;font-size:13px;font-weight:700;color:var(--sky-d);background:#fff;border-radius:999px;padding:5px 12px;box-shadow:0 1px 3px rgba(14,134,194,.15)}
.hero h1{font-family:var(--f-head);font-weight:900;font-size:clamp(30px,4.4vw,52px);line-height:1.22;letter-spacing:-.03em;margin-top:14px;word-break:keep-all}
.hero h1 em{font-style:normal;color:var(--sky)}
.hero .lead{margin:16px 0 0;font-size:17px;color:var(--muted);max-width:30em}
.hero-ctas{display:flex;flex-wrap:wrap;gap:10px;margin-top:26px}
.hero-ctas .btn{padding:14px 20px;font-size:16px;border-radius:14px}

/* 로그인 카드 */
.card{background:#fff;border-radius:22px;box-shadow:0 20px 50px rgba(15,26,43,.10),0 2px 6px rgba(15,26,43,.05);padding:22px 24px;min-width:0}
.card h2{font-size:21px;font-weight:900;letter-spacing:-.02em}
.card .sub{margin:4px 0 14px;color:var(--muted);font-size:14px}
.field{display:grid;gap:6px;margin-bottom:12px}
.field label{font-size:13px;font-weight:700;color:var(--muted)}
.field input{width:100%;border:2px solid var(--line);border-radius:14px;padding:13px 14px;font-size:18px;background:#fff;color:var(--ink)}
.field input:focus{border-color:var(--sky);outline:none}
#sid{font-variant-numeric:tabular-nums;letter-spacing:.12em;font-weight:700}
.parsed{display:flex;gap:6px;flex-wrap:wrap;min-height:28px}
.parsed span{font-size:13px;font-weight:700;border-radius:999px;padding:4px 10px;background:var(--soft);color:var(--muted)}
.parsed span.on{background:var(--sky-soft);color:var(--sky-d)}
.digits{display:grid;grid-template-columns:repeat(5,1fr);gap:6px;margin-top:2px}
.digits div{text-align:center;font-size:11px;color:var(--muted);border-top:3px solid var(--line);padding-top:4px}
.digits div.g{border-top-color:#7DB9F0}.digits div.c{border-top-color:var(--mint)}.digits div.n{border-top-color:#F2B84B}
.err{color:var(--bad);font-size:14px;font-weight:700;min-height:1.4em;margin:2px 0 10px}
.card .btn-sky{width:100%;padding:15px;font-size:17px;border-radius:14px}
.card .btn-sky[disabled]{background:#B9D9EA;cursor:not-allowed}
.note{margin:12px 0 0;font-size:12px;color:var(--muted)}
.welcome .big{font-size:26px;font-weight:900;letter-spacing:-.02em;line-height:1.3}
.welcome .tag{display:inline-block;margin-top:8px;font-size:14px;font-weight:700;color:var(--sky-d);background:var(--sky-soft);border-radius:999px;padding:4px 12px}
.welcome .row{display:flex;gap:8px;flex-wrap:wrap;margin-top:18px}
.welcome .row .btn{flex:1}

/* 숫자 띠 */
.stats .inner{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;padding-block:26px}
@media(max-width:640px){.stats .inner{grid-template-columns:1fr;gap:10px;padding-block:28px}}
.stat{text-align:center;display:grid;justify-items:center;gap:4px}
.stat svg{width:34px;height:34px;color:#8CCBF0}
.stat span{font-size:14px;color:var(--muted);font-weight:700}
.stat b{font-size:clamp(19px,2.3vw,26px);font-weight:900;letter-spacing:-.02em;word-break:keep-all;line-height:1.3}

/* 과목 */
.subjects-sec{padding-block:8px 56px}
.sec-head{display:flex;align-items:end;justify-content:space-between;gap:12px;flex-wrap:wrap}
.sec-head h2{font-size:28px;font-weight:900;letter-spacing:-.02em}
.sec-head p{margin:4px 0 0;color:var(--muted);font-size:14px}
.grades{display:grid;grid-template-columns:1fr 1fr;gap:4px;background:var(--soft);border-radius:14px;padding:4px;min-width:240px}
.grades button{border:none;background:none;border-radius:11px;padding:9px 16px;font-weight:700;color:var(--muted)}
.grades button[aria-selected="true"]{background:#fff;color:var(--ink);box-shadow:0 1px 4px rgba(15,26,43,.12)}
.subjects{list-style:none;margin:20px 0 0;padding:0;display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:14px}
.subj{display:grid;grid-template-columns:auto 1fr;gap:4px 14px;align-items:center;text-decoration:none;background:#fff;border:1.5px solid var(--line);border-radius:20px;padding:18px;min-width:0;height:100%;transition:box-shadow .15s,transform .1s,border-color .15s}
.subj:hover{box-shadow:0 10px 26px rgba(15,26,43,.08);border-color:transparent}
.subj:active{transform:translateY(2px)}
.glyph{grid-row:span 2;width:54px;height:54px;border-radius:16px;display:grid;place-items:center;font-weight:900;font-size:22px;background:var(--cs,var(--soft));color:var(--c,var(--ink))}
.subj h3{font-size:17px;line-height:1.3;min-width:0}
.pill{justify-self:start;font-size:12px;font-weight:700;border-radius:999px;padding:2px 10px;background:var(--soft);color:var(--muted)}
.pill.ready{background:#DDF1E6;color:var(--ok)}
.mine{font-size:12px;font-weight:700;color:var(--sky-d);margin-left:6px}
.cta-wide{display:block;max-width:560px;margin:40px auto 0;text-align:center;padding:16px;border-radius:14px;font-size:17px;background:linear-gradient(180deg,#36B6EE,#1497D6);color:#fff;font-weight:700;text-decoration:none;box-shadow:0 8px 20px rgba(20,151,214,.25)}
.foot{border-top:1px solid var(--line);color:var(--muted);font-size:12px;text-align:center;padding-block:24px calc(24px + env(safe-area-inset-bottom,0px))}

/* 과목 페이지(준비 중 틀) */
.page{max-width:900px;margin:0 auto;padding-left:max(20px,env(safe-area-inset-left,0px));padding-right:max(20px,env(safe-area-inset-right,0px));padding-block:24px 72px}
.subj-head{display:flex;align-items:center;gap:14px;margin-top:8px}
.subj-head .glyph{grid-row:auto;width:62px;height:62px;font-size:26px}
.subj-head h1{font-size:30px;font-weight:900;letter-spacing:-.02em;line-height:1.2}
.subj-head p{margin:2px 0 0;color:var(--muted);font-size:14px}
.notice{margin-top:20px;border-radius:16px;padding:14px 16px;background:var(--cs,var(--soft));font-size:14px}
.notice b{color:var(--c,var(--ink))}
.menu{list-style:none;margin:18px 0 0;padding:0;display:grid;gap:10px}
.menu li{display:grid;grid-template-columns:auto 1fr auto;gap:14px;align-items:center;border:1.5px solid var(--line);border-radius:18px;padding:14px 16px;min-width:0}
.menu .no{font-weight:900;font-size:17px;width:40px;height:40px;border-radius:50%;display:grid;place-items:center;background:var(--soft);color:var(--muted)}
.menu h3{font-size:16px}
.menu p{margin:2px 0 0;font-size:13px;color:var(--muted)}
.scope{margin-top:22px;border:2px dashed var(--line);border-radius:18px;padding:16px}
.scope h2{font-size:16px;margin-bottom:6px}
.scope ul{margin:0;padding-left:20px;color:var(--muted);font-size:14px}

/* 과목 슬라이드 (끊김 없이 왼쪽으로 흐름, 마우스·손가락을 올리면 멈춤) */
.marquee{overflow:hidden;padding-block:6px 14px;-webkit-mask-image:linear-gradient(90deg,transparent,#000 6%,#000 94%,transparent);mask-image:linear-gradient(90deg,transparent,#000 6%,#000 94%,transparent)}
.track{list-style:none;margin:0;padding:0;display:flex;gap:14px;width:max-content;animation:slide var(--dur,32s) linear infinite}
.track li{width:260px;flex:none}
.marquee:hover .track,.marquee:focus-within .track,.marquee:active .track{animation-play-state:paused}
@keyframes slide{from{transform:translateX(0)}to{transform:translateX(calc(-50% - 7px))}}
@media (prefers-reduced-motion: reduce){.track{animation:none}.marquee{overflow-x:auto}}
.cta-wide{margin-top:26px}

/* 스터디 플래너 */
.planner{display:grid;gap:12px}
.pl-head{display:flex;justify-content:space-between;align-items:flex-start;gap:10px;flex-wrap:wrap}
.pl-title{margin:0;font-size:20px;font-weight:900;letter-spacing:-.02em}
.pl-who{margin:2px 0 0;font-size:13px;color:var(--sky-d);font-weight:700}
.pl-week{display:flex;align-items:center;gap:6px;font-size:14px;color:var(--muted);font-variant-numeric:tabular-nums}
.pl-week b{color:var(--ink)}
.pl-arrow{width:32px;height:32px;border:none;border-radius:10px;background:var(--soft);font-size:20px;line-height:1;color:var(--ink)}
.pl-arrow[disabled]{opacity:.35;cursor:not-allowed}
.pl-days{display:grid;grid-template-columns:repeat(7,minmax(0,1fr));gap:6px}
.pl-day{border:1.5px solid var(--line);background:#fff;border-radius:14px;padding:8px 0 6px;display:grid;justify-items:center;gap:1px;min-width:0}
.pl-day .w{font-size:12px;font-weight:700;color:var(--muted)}
.pl-day .w.sat{color:#2563C9}.pl-day .w.sun{color:var(--bad)}
.pl-day .n{font-size:17px;font-weight:900;font-variant-numeric:tabular-nums}
.pl-day .dots{font-size:10px;color:var(--muted);min-height:14px;font-variant-numeric:tabular-nums}
.pl-day.today{border-color:var(--sky)}
.pl-day.on{background:var(--sky);border-color:var(--sky);color:#fff}
.pl-day.on .w,.pl-day.on .dots{color:#fff}
.pl-day.full:not(.on) .dots{color:var(--ok);font-weight:700}
.pl-day.off{opacity:.35;cursor:not-allowed}
.pl-sum{display:flex;justify-content:space-between;font-size:14px;font-weight:700}
.pl-sum span:last-child{color:var(--muted);font-weight:500}
.pl-bar{height:6px;border-radius:999px;background:var(--soft);overflow:hidden}
.pl-bar i{display:block;height:100%;background:var(--mint);border-radius:999px}
.pl-list{list-style:none;margin:0;padding:0;display:grid;gap:6px;max-height:220px;overflow-y:auto}
.pl-list li{display:flex;align-items:center;gap:8px;border:1.5px solid var(--line);border-radius:12px;padding:8px 10px;min-width:0}
.pl-list label{display:flex;align-items:center;gap:10px;flex:1;min-width:0;cursor:pointer}
.pl-list input{width:20px;height:20px;accent-color:var(--sky);flex:none}
.pl-list .tx{overflow-wrap:anywhere;font-size:15px}
.pl-list li.done .tx{text-decoration:line-through;color:var(--muted)}
.pl-list .sj{flex:none;font-size:11px;font-weight:700;background:var(--sky-soft);color:var(--sky-d);border-radius:999px;padding:2px 8px}
.pl-list .del{flex:none;border:none;background:none;color:var(--muted);font-size:18px;line-height:1;padding:2px 4px}
.pl-list .empty-li{justify-content:center;color:var(--muted);font-size:13px;border-style:dashed}
.pl-add{display:grid;grid-template-columns:auto 1fr auto;gap:6px}
.pl-add select,.pl-add input{border:1.5px solid var(--line);border-radius:12px;padding:10px;font-size:15px;background:#fff;min-width:0}
.pl-add select{max-width:120px}
.pl-add input:focus,.pl-add select:focus{border-color:var(--sky);outline:none}
.pl-add button{border:none;border-radius:12px;background:var(--sky);color:#fff;font-weight:700;padding:0 16px}
@media(max-width:420px){.pl-add{grid-template-columns:1fr auto}.pl-add select{grid-column:1/-1;max-width:none}.pl-day .n{font-size:15px}}