/* player.css — Course Player (3열 학습 화면) */
:root{--bg:#07080a;--pane:#0b0d12;--ink:oklch(95% .006 240);--dim:oklch(70% .014 250);--faint:oklch(50% .014 250);
 --a:oklch(76% .062 190);--am:oklch(80% .10 80);--no:oklch(68% .15 25);--ok:oklch(78% .11 150);
 --line:oklch(100% 0 0/.10);--card:linear-gradient(168deg,oklch(23% .012 250/.5),oklch(9% .01 250/.9))}
*{margin:0;padding:0;box-sizing:border-box}*,*::before,*::after{min-width:0}
html,body{max-width:100%;overflow-x:hidden}
body{background:var(--bg);color:var(--ink);line-height:1.6;-webkit-font-smoothing:antialiased;
 font-family:-apple-system,BlinkMacSystemFont,'Pretendard','Inter','Segoe UI',sans-serif}
a{color:inherit;text-decoration:none} button{font:inherit;cursor:pointer}

/* 게이트 */
.gate{position:fixed;inset:0;z-index:9000;display:grid;place-items:center;background:var(--bg);padding:1.4rem}
.gate.off{display:none}
.gatebox{width:min(430px,100%);border:1px solid var(--line);border-radius:24px;padding:2rem 1.8rem;background:var(--card)}
.gatebox .tag{font-size:.64rem;font-weight:800;letter-spacing:.2em;text-transform:uppercase;color:var(--a)}
.gatebox h1{font-size:1.45rem;font-weight:900;letter-spacing:-.03em;margin:.6rem 0 .3rem}
.gatebox p{font-size:.85rem;color:var(--dim);margin-bottom:1.3rem}
.gatebox input{width:100%;font:inherit;font-size:1rem;color:var(--ink);background:oklch(100% 0 0/.03);
 border:1px solid var(--line);border-radius:13px;padding:.75rem .95rem;outline:none;letter-spacing:.15em}
.gatebox input:focus{border-color:color-mix(in oklab,var(--a) 45%,transparent)}
.gatebox .row{display:flex;gap:.5rem;margin-top:.8rem}
.gatebox button{flex:1;font-weight:800;font-size:.87rem;border-radius:13px;padding:.72rem 1rem;
 background:var(--a);color:#07090a;border:1px solid var(--a)}
.gatebox .sec{background:none;color:var(--dim);border-color:var(--line);flex:0 0 auto}
.gatebox .err{font-size:.8rem;color:var(--no);margin-top:.7rem;min-height:1.2em}

/* 상단 바 */
.pbar{position:sticky;top:0;z-index:400;display:flex;gap:.6rem;align-items:center;flex-wrap:wrap;
 padding:.75rem clamp(.9rem,2.5vw,1.6rem);background:oklch(6% .008 245/.9);backdrop-filter:blur(14px);
 border-bottom:1px solid var(--line)}
.pbar .back{font-size:.8rem;font-weight:700;color:var(--dim)}
.pbar .back:hover{color:var(--ink)}
.pbar .cname{font-size:.95rem;font-weight:900;letter-spacing:-.02em}
.pbar .tabs{display:flex;gap:.3rem;margin-left:.6rem;flex-wrap:wrap}
.pbar .tabs a{font-size:.78rem;font-weight:800;padding:.4rem .8rem;border-radius:9px;color:var(--faint);transition:.18s}
.pbar .tabs a:hover{color:var(--ink)}
.pbar .tabs a.on{background:color-mix(in oklab,var(--a) 15%,transparent);color:var(--a)}
.pbar .sp{margin-left:auto}
.pill{font-size:.74rem;font-weight:800;padding:.42rem .85rem;border-radius:10px;border:1px solid var(--line);
 background:oklch(100% 0 0/.03);color:var(--dim);transition:.18s}
.pill:hover{color:var(--ink)}
.pill.on{background:color-mix(in oklab,var(--a) 16%,transparent);color:var(--a);border-color:color-mix(in oklab,var(--a) 42%,transparent)}

/* 진도 링 */
.ring{display:flex;align-items:center;gap:.55rem}
.ring svg{width:34px;height:34px;transform:rotate(-90deg)}
.ring circle{fill:none;stroke-width:3.5}
.ring .bgc{stroke:oklch(100% 0 0/.09)}
.ring .fgc{stroke:var(--a);stroke-linecap:round;transition:stroke-dashoffset .8s cubic-bezier(.4,0,.2,1)}
.ring b{font-size:.82rem;font-weight:900;color:var(--a)}
.ring span{font-size:.68rem;color:var(--faint);display:block;line-height:1.25}

/* 3열 레이아웃 */
.stage{display:grid;grid-template-columns:1fr 340px;gap:0;min-height:calc(100dvh - 58px)}
.left{border-right:1px solid var(--line);min-width:0}
.vwrap{position:relative;width:100%;aspect-ratio:16/9;background:#000}
.vwrap iframe{position:absolute;inset:0;width:100%;height:100%;border:0}
.vwrap .empty{position:absolute;inset:0;display:grid;place-items:center;text-align:center;color:var(--faint);
 font-size:.88rem;padding:2rem;background:linear-gradient(168deg,oklch(14% .01 250),oklch(7% .01 250))}
.vwrap .empty b{display:block;color:var(--dim);font-size:1rem;margin-bottom:.4rem}

.meta{padding:1.1rem clamp(1rem,2.5vw,1.6rem)}
.meta .kick{font-size:.64rem;font-weight:900;letter-spacing:.16em;text-transform:uppercase;color:var(--a)}
.meta h1{font-size:clamp(1.15rem,2.4vw,1.6rem);font-weight:900;letter-spacing:-.03em;margin:.35rem 0 .2rem}
.meta .sub{font-size:.84rem;color:var(--dim)}
.meta .act{display:flex;gap:.5rem;flex-wrap:wrap;margin-top:.9rem}

/* 챕터 마커 */
.marks{display:flex;gap:.4rem;flex-wrap:wrap;margin-top:.9rem}
.marks button{font-size:.74rem;font-weight:700;padding:.36rem .72rem;border-radius:9px;color:var(--dim);
 border:1px solid var(--line);background:oklch(100% 0 0/.02)}
.marks button:hover{color:var(--a);border-color:color-mix(in oklab,var(--a) 40%,transparent)}
.marks button b{font-family:ui-monospace,Menlo,monospace;color:var(--a);margin-right:.35rem}

/* 탭 패널 */
.panes{border-top:1px solid var(--line);margin-top:1.1rem;padding-top:1rem}
.panes .tabs{display:flex;gap:.4rem;margin-bottom:.9rem}
.panes .tabs button{font-size:.78rem;font-weight:800;padding:.4rem .85rem;border-radius:9px;color:var(--faint);
 background:none;border:1px solid transparent}
.panes .tabs button.on{color:var(--a);border-color:color-mix(in oklab,var(--a) 35%,transparent);
 background:color-mix(in oklab,var(--a) 10%,transparent)}
.panes .bd{font-size:.87rem;color:var(--dim);line-height:1.75}
.panes .bd [contenteditable]{outline:none}
.panes .bd [contenteditable]:focus{color:var(--ink)}

/* 커리큘럼 사이드 */
.side{background:var(--pane);display:flex;flex-direction:column;max-height:calc(100dvh - 58px);position:sticky;top:58px}
.side .hd{padding:.9rem 1.1rem;border-bottom:1px solid var(--line);font-size:.66rem;font-weight:900;
 letter-spacing:.14em;text-transform:uppercase;color:var(--a);display:flex;align-items:center;gap:.5rem}
.side .hd span{margin-left:auto;font-size:.7rem;font-weight:700;letter-spacing:0;text-transform:none;color:var(--faint)}
.side .list{overflow-y:auto;flex:1}
.wkhd{position:sticky;top:0;background:var(--pane);padding:.5rem 1.1rem;font-size:.64rem;font-weight:900;
 letter-spacing:.14em;color:var(--faint);border-bottom:1px solid var(--line);z-index:2}
.li{display:grid;grid-template-columns:26px 1fr auto;gap:.6rem;align-items:center;padding:.62rem 1.1rem;
 border-bottom:1px solid oklch(100% 0 0/.05);cursor:pointer;transition:.15s}
.li:hover{background:oklch(100% 0 0/.03)}
.li.on{background:color-mix(in oklab,var(--a) 12%,transparent);
 box-shadow:inset 3px 0 0 var(--a)}
.li .ck{font-size:.8rem;color:var(--faint);text-align:center}
.li.done .ck{color:var(--ok)}
.li.on .ck{color:var(--a)}
.li .t b{display:block;font-size:.84rem;font-weight:700;letter-spacing:-.01em;color:var(--ink)}
.li .t span{font-size:.72rem;color:var(--faint)}
.li.locked{opacity:.42;cursor:not-allowed}
.li .st{font-size:.62rem;font-weight:800;padding:.15rem .48rem;border-radius:999px;white-space:nowrap}
.li .st.draft{color:var(--am);border:1px solid color-mix(in oklab,var(--am) 40%,transparent)}
.li .st.sch{color:var(--a);border:1px solid color-mix(in oklab,var(--a) 40%,transparent)}

/* 편집 패널 */
.edit{border-top:1px solid var(--line);padding:.85rem 1.1rem;background:oklch(100% 0 0/.02)}
.edit label{display:block;font-size:.62rem;font-weight:900;letter-spacing:.12em;text-transform:uppercase;
 color:var(--a);margin:.55rem 0 .25rem}
.edit input,.edit select{width:100%;font:inherit;font-size:.82rem;color:var(--ink);background:oklch(100% 0 0/.04);
 border:1px solid var(--line);border-radius:9px;padding:.42rem .6rem;outline:none}
.edit input:focus,.edit select:focus{border-color:color-mix(in oklab,var(--a) 45%,transparent)}
.edit .two{display:grid;grid-template-columns:1fr 1fr;gap:.5rem}
.edit .btns{display:flex;gap:.4rem;margin-top:.8rem;flex-wrap:wrap}

body:not([data-role="prof"]) .profonly{display:none !important}

@media(max-width:1000px){
  .stage{grid-template-columns:1fr}
  .left{border-right:none;border-bottom:1px solid var(--line)}
  .side{position:static;max-height:none}
  .side .list{max-height:60vh}
}