/* ============================================================
   YIC 수업관리 · 디자인 시스템 (다크+민트)
   모든 백엔드 템플릿이 공유.
   ============================================================ */
@import url('https://cdn.jsdelivr.net/gh/orioncactus/pretendard@v1.3.9/dist/web/variable/pretendardvariable-dynamic-subset.min.css');
:root{
  --bg:#0A0E0D; --bg2:#0C1211;
  --surface:#141B1C; --card:#141B1C; --card-hi:#1A2224; --surface-2:#1E2729; --raise:#1E2729;
  --border:rgba(255,255,255,.07); --border-2:rgba(255,255,255,.12); --line:rgba(255,255,255,.07);
  --text:#F2F6F5; --text-2:#AEBAB8; --muted:#788582;
  --mint:#2DD4BF; --mint-deep:#22B8A6; --mint-ink:#63E6D5; --mint-soft:#63E6D5;
  --mint-tint:rgba(45,212,191,.14); --on-mint:#05231E;
  --amber:#F0C560; --amber-tint:rgba(240,197,96,.15);
  --red:#F0918A; --red-tint:rgba(240,145,138,.15);
  --charcoal:#0A0E0D;
  --sans:"Pretendard","Pretendard Variable","Apple SD Gothic Neo","Malgun Gothic",-apple-system,BlinkMacSystemFont,"SF Pro Display","Segoe UI",Roboto,system-ui,sans-serif;
  --mono:"SF Mono","JetBrains Mono",ui-monospace,Consolas,monospace;
  --shadow:0 1px 0 rgba(255,255,255,.045) inset, 0 24px 48px -28px rgba(0,0,0,.7);
  --shadow-sm:0 1px 0 rgba(255,255,255,.04) inset, 0 12px 24px -18px rgba(0,0,0,.6);
  --r:22px; --r-sm:16px; --r-xs:12px;
  /* 파생 토큰 — 라이트 모드에서 재정의 */
  --sun:#F0918A; --sat:#7FB4F0;
  --grad-mint-1:#63E6D5; --grad-mint-2:#2DD4BF; /* 버튼 그라데이션(두 테마 동일: 밝은 민트 + 짙은 글자) */
  --appbar-bg:rgba(10,14,13,.62);
  --ph:#5c6663;
  color-scheme:dark;
}

/* ---------- 라이트 모드 (테마 토글: /js/theme.js) ---------- */
html[data-theme="light"]{
  --bg:#F2F6F5; --bg2:#EAF1EF;
  --surface:#FFFFFF; --card:#FFFFFF; --card-hi:#FFFFFF; --surface-2:#E7EEEC; --raise:#EDF3F1;
  --border:rgba(10,34,30,.10); --border-2:rgba(10,34,30,.17); --line:rgba(10,34,30,.09);
  --text:#121D1B; --text-2:#43534F; --muted:#6A7B77;
  --mint:#12A08D; --mint-deep:#0E8878; --mint-ink:#0A7568; --mint-soft:#0D8B7B;
  --mint-tint:rgba(18,160,141,.12);
  --amber:#9C6E04; --amber-tint:rgba(156,110,4,.12);
  --red:#C2473C; --red-tint:rgba(194,71,60,.10);
  --sun:#C94F44; --sat:#2563EB;
  --appbar-bg:rgba(247,250,249,.78);
  --ph:#9AA6A2;
  --shadow:0 1px 0 rgba(255,255,255,.6) inset, 0 20px 40px -30px rgba(15,45,40,.28);
  --shadow-sm:0 1px 0 rgba(255,255,255,.5) inset, 0 10px 22px -18px rgba(15,45,40,.22);
  color-scheme:light;
}
html[data-theme="light"] body::before{
  background:
    radial-gradient(900px 500px at 85% -10%, rgba(18,160,141,.09), transparent 60%),
    radial-gradient(700px 600px at -10% 110%, rgba(18,160,141,.05), transparent 55%),
    linear-gradient(180deg, var(--bg2), var(--bg));
}
html[data-theme="light"] .tbl tbody tr:hover td{background:rgba(10,34,30,.03)}
html[data-theme="light"] .slot{background:rgba(10,34,30,.02)}
*{box-sizing:border-box}
body{
  margin:0;background:var(--bg);color:var(--text);font-family:var(--sans);
  font-size:16px;line-height:1.5;letter-spacing:-.01em;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;text-rendering:optimizeLegibility;
}
body::before{content:"";position:fixed;inset:0;z-index:0;pointer-events:none;
  background:
    radial-gradient(900px 500px at 85% -10%, rgba(45,212,191,.09), transparent 60%),
    radial-gradient(700px 600px at -10% 110%, rgba(45,212,191,.05), transparent 55%),
    linear-gradient(180deg, var(--bg2), var(--bg));
}
a{color:inherit;text-decoration:none}
button{font-family:inherit}
::selection{background:var(--mint);color:var(--on-mint)}
.muted{color:var(--muted)}
.logomark{width:34px;height:34px;flex:none}
.brandword{font-weight:900;font-style:italic;letter-spacing:0}
.brandword .m{color:var(--mint-soft)}

/* ---------- top app bar (frosted) ---------- */
.appbar{position:sticky;top:0;z-index:20;display:flex;align-items:center;gap:12px;height:64px;padding:0 20px;
  background:var(--appbar-bg);backdrop-filter:blur(20px) saturate(1.4);border-bottom:1px solid var(--line)}
.appbar .brandword{font-size:1.15rem}
.appbar .sys{font-size:.72rem;color:var(--muted);font-weight:600;padding-left:11px;margin-left:3px;border-left:1px solid var(--border-2)}
.appbar .spacer{margin-left:auto}
.role-pill{font-size:.66rem;font-weight:800;letter-spacing:0;color:var(--mint-soft);background:var(--mint-tint);
  border:1px solid rgba(45,212,191,.25);padding:6px 11px;border-radius:100px}
.who{font-size:.86rem;color:var(--text-2)}
.who b{color:var(--text);font-weight:700}
.appbar form{margin:0;display:flex}
.logout{background:var(--card);border:1px solid var(--border);color:var(--text-2);border-radius:12px;
  padding:9px 14px;font-size:.82rem;font-weight:600;cursor:pointer;transition:.18s}
.logout:hover{border-color:var(--red);color:var(--red)}
.theme-toggle{display:inline-grid;place-items:center;width:38px;height:38px;flex:none;border-radius:12px;
  background:var(--card);border:1px solid var(--border);color:var(--text-2);cursor:pointer;transition:.18s;padding:0}
.theme-toggle svg{width:17px;height:17px}
.theme-toggle:hover{border-color:var(--mint);color:var(--mint-soft)}

/* ---------- content shell ---------- */
.content{position:relative;z-index:1;max-width:760px;margin:0 auto;padding:34px 20px 64px}
.content h2{margin:0;font-size:clamp(1.5rem,4.5vw,1.9rem);font-weight:800;letter-spacing:0}
.content > p.muted{margin:8px 0 0;font-size:1rem}

/* ---------- cards ---------- */
.card{background:linear-gradient(180deg,var(--card-hi),var(--card));border:1px solid var(--line);
  border-radius:var(--r);box-shadow:var(--shadow);padding:24px;margin-top:16px}
.card h3{margin:0 0 4px;font-size:.85rem;font-weight:700;color:var(--muted);letter-spacing:0;text-transform:none}
.card ul{margin:.6rem 0 0;padding-left:1.1rem;color:var(--text-2)}
.card li{margin:.35rem 0}
.grid2{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-top:14px}
.stat .row{display:flex;align-items:center;gap:12px;margin-top:12px}
.mini-av{width:42px;height:42px;border-radius:13px;display:grid;place-items:center;font-weight:800;font-size:1rem;color:var(--on-mint);background:linear-gradient(145deg,var(--grad-mint-1),var(--grad-mint-2));flex:none}
.stat .big{font-size:1.08rem;font-weight:800;letter-spacing:0}
.stat .sub{color:var(--muted);font-size:.85rem;margin-top:3px}

/* ---------- buttons ---------- */
.btn-mint,.cta{display:inline-flex;align-items:center;justify-content:center;gap:8px;font-size:1rem;font-weight:800;
  color:var(--on-mint);background:linear-gradient(180deg,var(--grad-mint-1),var(--grad-mint-2));border:none;border-radius:16px;
  padding:15px 22px;cursor:pointer;box-shadow:0 10px 24px -12px rgba(45,212,191,.6);
  transition:transform .16s ease, box-shadow .2s;width:100%;text-align:center}
.btn-mint:hover,.cta:hover{transform:translateY(-2px);box-shadow:0 16px 30px -14px rgba(45,212,191,.7)}
.btn-mint:active,.cta:active{transform:translateY(0) scale(.99)}
.cta{width:auto;margin-top:22px}
.linkcta{display:inline-flex;align-items:center;gap:8px;background:linear-gradient(180deg,var(--grad-mint-1),var(--grad-mint-2));
  color:var(--on-mint);padding:14px 20px;border-radius:16px;font-weight:800;box-shadow:0 10px 24px -12px rgba(45,212,191,.6);transition:.18s}
.linkcta:hover{transform:translateY(-2px)}
.btn-sm{display:inline-flex;align-items:center;justify-content:center;vertical-align:middle;line-height:1;
  background:linear-gradient(180deg,var(--grad-mint-1),var(--grad-mint-2));color:var(--on-mint);border:none;border-radius:11px;
  padding:10px 15px;font-size:.82rem;font-weight:800;cursor:pointer;transition:.16s;text-decoration:none}
.btn-sm:hover{transform:translateY(-1px)}
.btn-sm.ghost{background:var(--raise);color:var(--text-2);border:1px solid var(--border-2)}
.btn-sm.ghost:hover{color:var(--text)}
.btn-sm.red{background:var(--red-tint);color:var(--red);border:1px solid rgba(240,145,138,.4)}
.inline-form{display:inline}
.inline-form + .inline-form{margin-left:6px}

/* ---------- forms ---------- */
.frm{margin-top:6px}
.field,.frm .field{display:flex;flex-direction:column;gap:8px;margin-bottom:14px}
.field label,.frm label{display:block;font-size:.78rem;font-weight:600;color:var(--text-2);letter-spacing:0;text-transform:none}
.frm label{margin-bottom:7px}
.frm > .frow{margin-bottom:14px}
/* background-color(shorthand 아님)로 지정 — shorthand 는 select 의 화살표 background-image 를 지워버림 */
input,select,.field input,.frm input,.frm select{width:100%;background-color:var(--bg);border:1px solid var(--border-2);
  border-radius:13px;padding:14px 15px;color:var(--text);font-size:.98rem;font-family:var(--sans);transition:.18s;appearance:none}
input::placeholder{color:var(--ph)}
input:focus,select:focus{outline:none;border-color:var(--mint);box-shadow:0 0 0 4px rgba(45,212,191,.14)}
select,.frm select,.field select{appearance:none;-webkit-appearance:none;cursor:pointer;padding-right:40px;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='14' height='14' fill='none' stroke='%239AA6A2' stroke-width='2'%3E%3Cpath d='M2.5 5l4.5 4.5L11.5 5' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  background-repeat:no-repeat;background-position:right 14px center}
.frow{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-bottom:4px}
.frow .full{grid-column:1/-1}
input[type="checkbox"]{width:19px;height:19px;appearance:auto;-webkit-appearance:auto;accent-color:var(--mint);flex:none;margin:0;cursor:pointer}
.check-row{display:flex;align-items:center;gap:12px;padding:13px 14px;border:1px solid var(--border-2);border-radius:13px;
  margin-bottom:10px;cursor:pointer;transition:border-color .15s;background:var(--bg)}
.check-row:hover{border-color:var(--mint)}
.check-row:has(input:checked){border-color:rgba(45,212,191,.5);background:var(--mint-tint)}
.check-row b{display:block;font-size:.92rem;color:var(--text)}
.check-row small{display:block;color:var(--muted);font-size:.78rem;margin-top:2px}

/* ---------- flash / alerts ---------- */
.flash,.alert{border-radius:14px;padding:14px 16px;font-size:.9rem;font-weight:500;margin:0 0 16px;border:1px solid}
.flash.ok,.alert.ok{background:var(--mint-tint);border-color:rgba(45,212,191,.4);color:var(--mint-soft)}
.flash.err,.alert.err{background:var(--red-tint);border-color:rgba(240,145,138,.45);color:var(--red)}

/* ---------- pills / status ---------- */
.pill{display:inline-flex;align-items:center;vertical-align:middle;font-size:.74rem;font-weight:700;line-height:1;
  padding:6px 11px;border-radius:100px;background:var(--raise);color:var(--text-2);white-space:nowrap}
.pill.mint{background:var(--mint-tint);color:var(--mint-soft)}
.pill.warn{background:var(--amber-tint);color:var(--amber)}
.pill.red{background:var(--red-tint);color:var(--red)}
.metric-value{font-size:1.7rem;font-weight:800;margin-top:4px}
.metric-value.warn{color:var(--amber)}
.metric-value.danger{color:var(--red)}

/* ---------- tables ---------- */
.tblwrap{overflow-x:auto;margin-top:14px;border-radius:var(--r-sm)}
.tbl{width:100%;border-collapse:collapse;font-size:.9rem;min-width:440px}
.tbl th{text-align:left;font-size:.72rem;font-weight:600;letter-spacing:0;text-transform:none;color:var(--muted);
  padding:10px 12px;border-bottom:1px solid var(--line);white-space:nowrap}
.tbl td{padding:14px 12px;border-bottom:1px solid var(--line);color:var(--text-2);vertical-align:middle;white-space:nowrap}
.tbl tr:last-child td{border-bottom:none}
.tbl tr{transition:background .15s}
.tbl tbody tr:hover td{background:rgba(255,255,255,.02)}
.empty{color:var(--muted);font-size:.9rem;padding:10px 2px}

/* ---------- big number ---------- */
.big-num{font-size:2.6rem;font-weight:800;letter-spacing:0;font-variant-numeric:tabular-nums;line-height:1}
.big-num .u{color:var(--mint-soft);font-size:.42em;font-weight:700}

/* ---------- hero (수강권 donut) ---------- */
.hero{margin-top:6px;display:grid;grid-template-columns:1fr auto;gap:26px;align-items:center}
.hero .eyebrow{font-size:.82rem;font-weight:700;color:var(--mint-soft)}
.hero .lead{margin:12px 0 0;font-size:1.32rem;font-weight:800;letter-spacing:0;line-height:1.3}
.hero .lead b{color:var(--mint-soft)}
.chips{display:flex;gap:8px;margin-top:16px;flex-wrap:wrap}
.chip{display:inline-flex;align-items:center;gap:6px;font-size:.82rem;font-weight:600;color:var(--text-2);
  background:var(--raise);border:1px solid var(--line);padding:7px 12px;border-radius:100px}
.chip .dot{width:7px;height:7px;border-radius:50%;background:var(--mint)}
.chip.urgent{color:var(--red);background:var(--red-tint);border-color:rgba(240,145,138,.35)}
.student-head{display:flex;align-items:flex-start;justify-content:space-between;gap:16px;margin-bottom:18px}
.student-head p{margin:7px 0 0;font-size:.95rem}
.account-link,.back-link{display:inline-flex;align-items:center;justify-content:center;min-height:38px;padding:0 13px;border-radius:12px;
  color:var(--mint-soft);background:var(--mint-tint);border:1px solid rgba(45,212,191,.22);font-size:.82rem;font-weight:800;white-space:nowrap}
.back-link{margin-bottom:12px;color:var(--text-2);background:var(--raise);border-color:var(--line)}
.back-link::before{content:"←";margin-right:7px}
.hero-actions{display:grid;grid-template-columns:auto minmax(112px,1fr) minmax(112px,1fr);gap:10px;align-items:stretch;margin-top:22px}
.hero-actions .cta{margin-top:0}
.quick-link{display:flex;flex-direction:column;justify-content:center;min-height:58px;padding:11px 13px;border-radius:16px;
  color:var(--text);background:var(--raise);border:1px solid var(--line);transition:.16s}
.quick-link:hover{border-color:var(--mint);color:var(--mint-soft)}
.quick-link span{font-size:.9rem;font-weight:800}
.quick-link small{margin-top:2px;color:var(--muted);font-size:.74rem;font-weight:700}
.donut{position:relative;width:150px;height:150px;flex:none}
.donut svg{width:100%;height:100%;transform:rotate(-90deg)}
.donut .track{fill:none;stroke:var(--raise);stroke-width:11}
.donut .prog{fill:none;stroke:url(#mg);stroke-width:11;stroke-linecap:round;stroke-dasharray:327;stroke-dashoffset:327;
  transition:stroke-dashoffset 1.1s cubic-bezier(.2,.8,.2,1)}
.donut .mid{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center}
.donut .mid .n{font-size:2.4rem;font-weight:800;letter-spacing:0;line-height:1;font-variant-numeric:tabular-nums}
.donut .mid .n em{font-style:normal;font-size:.95rem;color:var(--text-2);font-weight:700}
.donut .mid .l{font-size:.74rem;color:var(--muted);margin-top:5px;font-weight:600}

/* ---------- section title ---------- */
.sec-title{display:flex;align-items:center;justify-content:space-between;margin:30px 4px 4px}
.sec-title h2{margin:0;font-size:1.12rem;font-weight:800;letter-spacing:0}
.sec-title a{color:var(--muted);font-size:.86rem;font-weight:600}
.sec-title a:hover{color:var(--mint-soft)}

/* ---------- schedule item list ---------- */
.list{padding:8px !important}
.item{display:flex;align-items:center;gap:14px;padding:14px;border-radius:var(--r-sm);transition:background .16s}
.item:hover{background:var(--raise)}
.item + .item{border-top:1px solid var(--line)}
.date{width:52px;height:52px;border-radius:14px;background:var(--raise);border:1px solid var(--line);
  display:flex;flex-direction:column;align-items:center;justify-content:center;flex:none}
.date .d{font-size:1.2rem;font-weight:800;line-height:1;letter-spacing:0;font-variant-numeric:tabular-nums}
.date .w{font-size:.66rem;color:var(--muted);margin-top:3px;font-weight:700}
.item .ibody{flex:1;min-width:0}
.item .ibody .t{font-weight:700;font-size:.98rem}
.item .ibody .m{color:var(--muted);font-size:.85rem;margin-top:3px;display:flex;align-items:center;gap:7px}
.cav{width:20px;height:20px;border-radius:50%;background:linear-gradient(145deg,var(--grad-mint-1),var(--grad-mint-2));
  color:var(--on-mint);display:inline-grid;place-items:center;font-size:.62rem;font-weight:800;flex:none}
.item-actions{display:flex;flex-direction:column;gap:6px;align-items:flex-end;flex:none}
.item-actions form{margin:0}
.change-request,.request-note{width:100%;margin-left:66px;border:1px solid var(--line);border-radius:13px;background:var(--bg);padding:10px 12px}
.change-request summary{cursor:pointer;color:var(--mint-soft);font-size:.84rem;font-weight:800}
.change-request form{display:grid;gap:8px;margin-top:10px}
.change-fields{display:grid;grid-template-columns:1fr 1fr;gap:8px}
.change-request input{padding:11px 12px;font-size:.88rem}
.change-request .btn-sm{justify-self:start}
.request-note{display:flex;flex-direction:column;gap:4px;color:var(--muted);font-size:.84rem}
.request-note b{color:var(--amber)}
.empty-state{display:flex;flex-direction:column;align-items:flex-start;gap:8px;padding:18px !important}
.empty-state strong{color:var(--text);font-size:.96rem}
.empty-state span{color:var(--muted);font-size:.88rem}
.empty-state.compact{padding:12px 2px !important}

/* ---------- student booking ---------- */
.book-brief{display:flex;align-items:center;justify-content:space-between;gap:14px;padding:18px 20px}
.book-brief div{display:flex;flex-direction:column;gap:2px}
.book-brief span{font-size:.78rem;color:var(--muted);font-weight:700}
.book-brief strong{font-size:1.65rem;line-height:1;color:var(--mint-soft);font-weight:900;font-variant-numeric:tabular-nums}
.book-brief strong span{font-size:inherit;color:inherit;font-weight:inherit}
.book-brief p{margin:0;max-width:360px;color:var(--text-2);font-size:.88rem}
.period-alert{font-style:normal;color:var(--red);font-size:.78rem;font-weight:800}
.slots-head{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:8px}
.slots-head h3{margin:0}
.slots-head span{font-size:.78rem;font-weight:800;color:var(--mint-soft);background:var(--mint-tint);border:1px solid rgba(45,212,191,.22);
  border-radius:100px;padding:5px 10px}
.slot{display:flex;align-items:center;justify-content:space-between;gap:14px;border:1px solid var(--line);
  border-radius:16px;padding:15px 16px;margin-top:10px;background:rgba(255,255,255,.015)}
.slot-main{min-width:0}
.slot-date{color:var(--text-2);font-size:.82rem;font-weight:700}
.slot-time{font-size:1.45rem;font-weight:900;line-height:1.15;margin-top:2px;font-variant-numeric:tabular-nums}
.slot-coach{color:var(--muted);font-size:.88rem;margin-top:4px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.slot-coach b{color:var(--mint-soft)}
.slot-action{margin:0;flex:none}
.slot-action .btn-sm{min-width:92px;min-height:42px}
.mobile-actions{display:none}

/* ---------- admin action inbox ---------- */
.action-inbox.needs-work{border-color:rgba(240,197,96,.42)}
.inbox-head{display:flex;align-items:flex-start;justify-content:space-between;gap:14px;margin-bottom:14px}
.inbox-head p{margin:4px 0 0;font-size:.86rem}
.inbox-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(118px,1fr));gap:10px}
.inbox-grid a{display:flex;align-items:center;justify-content:space-between;gap:10px;border:1px solid var(--line);border-radius:14px;
  background:var(--bg);padding:13px 14px}
.inbox-grid b{font-size:1.45rem;line-height:1;font-variant-numeric:tabular-nums}
.inbox-grid span{color:var(--text-2);font-size:.82rem;font-weight:800}
.inbox-grid a.hot b{color:var(--amber)}
.inbox-grid a.danger b{color:var(--red)}

/* ---------- auth (login) ---------- */
body.auth{min-height:100vh;display:grid;place-items:center;padding:24px}
.auth-card{position:relative;z-index:1;width:100%;max-width:430px;background:linear-gradient(180deg,var(--card-hi),var(--card));
  border:1px solid var(--line);border-radius:26px;box-shadow:var(--shadow);overflow:hidden}
.auth-top{padding:30px 32px 22px;border-bottom:1px solid var(--line)}
.auth-top .brand{display:flex;align-items:center;gap:10px}
.auth-top .brandword{font-size:1.5rem}
.auth-top .k{font-size:.7rem;font-weight:700;letter-spacing:0;color:var(--mint-soft);margin-top:18px}
.auth-top h1{margin:6px 0 0;font-size:1.5rem;font-weight:800;letter-spacing:0}
.auth-top p{margin:8px 0 0;color:var(--muted);font-size:.9rem}
.auth-body{padding:26px 32px 30px}
.divider{display:flex;align-items:center;gap:12px;color:var(--muted);font-size:.78rem;margin:22px 0 14px}
.divider::before,.divider::after{content:"";flex:1;height:1px;background:var(--line)}
.social{margin-top:0}
.social-btn{display:block;text-align:center;border:1px solid var(--border-2);border-radius:14px;padding:14px;margin-bottom:9px;
  font-weight:700;font-size:.9rem;color:var(--text-2);transition:.16s;background:var(--card)}
.social-btn:hover{border-color:var(--mint);color:var(--mint-soft)}
.note{margin-top:22px;text-align:center;font-size:.82rem;color:var(--muted);line-height:1.6}
.note b{color:var(--text-2)}

/* ---------- motion ---------- */
.rise{opacity:0;transform:translateY(14px);animation:rise .7s cubic-bezier(.2,.8,.2,1) forwards}
.rise:nth-of-type(2){animation-delay:.05s}.rise:nth-of-type(3){animation-delay:.1s}.rise:nth-of-type(4){animation-delay:.15s}
@keyframes rise{to{opacity:1;transform:none}}
@media (prefers-reduced-motion:reduce){.rise{animation:none;opacity:1;transform:none}.donut .prog{transition:none}}

/* ---------- responsive ---------- */
@media (max-width:560px){
  body{font-size:15px}
  body.student-mobile{padding-bottom:calc(96px + env(safe-area-inset-bottom))}
  body.student-mobile .content{z-index:auto}
  body.student-mobile::after{content:"";position:fixed;left:0;right:0;bottom:0;height:calc(96px + env(safe-area-inset-bottom));
    z-index:49;pointer-events:none;background:linear-gradient(180deg,rgba(10,14,13,0),var(--bg) 34%,var(--bg))}
  .appbar{height:56px;padding:0 12px;gap:8px}
  .appbar .brandword{font-size:1rem}
  .hero{grid-template-columns:1fr;justify-items:start}
  .student-hero{padding:18px}
  .hero .lead{font-size:1.16rem}
  .donut{width:124px;height:124px;margin:4px auto 0;justify-self:center}
  .donut .mid .n{font-size:1.95rem}
  .grid2{grid-template-columns:1fr}
  .card{padding:16px;border-radius:18px;margin-top:12px}
  .appbar .sys{display:none}
  .role-pill{display:none}
  .who{max-width:88px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;font-size:.78rem}
  .logout{padding:8px 10px;border-radius:10px;font-size:.74rem}
  .content{padding:22px 14px 104px}
  .content h2{font-size:1.34rem;line-height:1.25}
  .student-head{align-items:flex-start;margin-bottom:14px}
  .student-head p{font-size:.88rem;line-height:1.45}
  .account-link,.back-link{min-height:34px;padding:0 10px;border-radius:10px;font-size:.76rem}
  .hero-actions{grid-template-columns:1fr 1fr;gap:8px;margin-top:18px;width:100%}
  .hero-actions .cta{grid-column:1/-1;width:100%;min-height:50px}
  .quick-link{min-height:54px;border-radius:13px}
  .quick-link span{font-size:.86rem}
  .quick-link small{font-size:.7rem}
  .sec-title{margin-top:24px}
  .student-item{align-items:flex-start;gap:12px;flex-wrap:wrap}
  .student-item .ibody{flex:1 1 calc(100% - 66px)}
  .item-actions{width:100%;margin-left:64px;flex-direction:row;align-items:center;justify-content:space-between;gap:10px}
  .item-actions .btn-sm{min-height:38px}
  .change-request,.request-note{margin-left:64px;width:calc(100% - 64px)}
  .change-fields{grid-template-columns:1fr}
  .change-request .btn-sm{width:100%;min-height:40px}
  .empty-state .btn-sm{width:100%;min-height:42px}
  /* 카드형 모바일 테이블 — 래퍼에 .stack, 테이블에 .mobile-table, td에 data-label */
  .tblwrap.stack{overflow:visible;border-radius:0}
  .mobile-table{min-width:0;border-collapse:separate;border-spacing:0 10px}
  .mobile-table thead{display:none}
  .mobile-table tr{display:grid;grid-template-columns:1fr;gap:0;background:var(--bg);
    border:1px solid var(--line);border-radius:14px;padding:6px 0}
  .mobile-table td{display:flex;align-items:center;justify-content:space-between;gap:14px;
    padding:8px 12px;border-bottom:0;white-space:normal;text-align:left !important}
  .mobile-table td::before{content:attr(data-label);color:var(--muted);font-size:.76rem;font-weight:700;flex:none}
  .mobile-table td.acts{flex-wrap:wrap;justify-content:flex-end}
  .mobile-table td.acts::before{margin-right:auto}
  .mobile-table td .btn-sm{min-height:38px}
  .mobile-table td form{margin:0}
  .book-brief{align-items:flex-start;flex-direction:column;padding:16px}
  .book-brief p{font-size:.84rem}
  .slots-card{padding:14px}
  .slot{align-items:stretch;flex-direction:column;border-radius:14px;padding:14px}
  .slot-time{font-size:1.7rem}
  .slot-action,.slot-action .btn-sm{width:100%}
  .slot-action .btn-sm{min-height:46px}
  .mobile-actions{position:fixed;left:12px;right:12px;bottom:calc(12px + env(safe-area-inset-bottom));z-index:50;display:grid;grid-template-columns:repeat(3,1fr);
    gap:4px;padding:5px;border:1px solid var(--border-2);border-radius:18px;background:var(--card);
    box-shadow:0 18px 34px -20px rgba(0,0,0,.75);backdrop-filter:blur(18px) saturate(1.4)}
  .mobile-actions a{display:grid;place-items:center;min-height:44px;border-radius:13px;color:var(--text-2);font-size:.82rem;font-weight:900}
  .mobile-actions a.active,.mobile-actions a:hover{background:var(--mint);color:var(--on-mint)}
}

/* 브랜드 마크 — 흰색 마크 PNG를 마스크로 써서 현재 글자색(currentColor)으로 칠함 → 라이트/다크 자동 대응 */
.brandmark{display:inline-block;width:34px;height:34px;flex:none;vertical-align:middle;
  -webkit-mask:url("/images/logo-mark-white.png") center/contain no-repeat;
  mask:url("/images/logo-mark-white.png") center/contain no-repeat;
  background-color:currentColor}

/* 세션 남은 시간 칩(theme.js가 로그인된 앱바에 주입) — 5분 미만 경고색, 만료 시 빨강 */
.session-chip{display:inline-flex;align-items:center;gap:7px;font-family:var(--mono);font-size:.7rem;
  color:var(--muted);border:1px solid var(--border-2);border-radius:100px;padding:4px 5px 4px 11px;white-space:nowrap}
.session-chip .t{font-variant-numeric:tabular-nums;letter-spacing:.05em}
.session-chip button{background:none;border:1px solid var(--border-2);color:var(--text-2);
  font:700 .64rem/1 var(--mono);letter-spacing:.05em;padding:4px 8px;border-radius:100px;cursor:pointer;
  transition:border-color .15s,color .15s}
.session-chip button:hover{border-color:var(--mint);color:var(--mint)}
.session-chip.warn{color:var(--amber);border-color:var(--amber)}
.session-chip.warn .t{font-weight:700}
.session-chip.dead{color:var(--red);border-color:var(--red)}
.session-chip.dead button{border-color:var(--red);color:var(--red)}
@media (max-width:560px){
  .session-chip{font-size:.62rem;padding:3px 4px 3px 8px;gap:5px}
  .session-chip button{padding:3px 6px;font-size:.58rem}
}