:root{--bg:#f4f6fa;--card:#fff;--ink:#1c2430;--mut:#6b7686;--pri:#2457d6;--ok:#1f9d5b;--warn:#d98a00;--ng:#d6453d;--line:#e2e7ef}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.7 "Hiragino Sans","Hiragino Kaku Gothic ProN","Noto Sans JP","Yu Gothic UI","Meiryo","Noto Sans KR","Malgun Gothic",sans-serif}
a{color:var(--pri);text-decoration:none}a:hover{text-decoration:underline}
header.top{background:#fff;border-bottom:1px solid var(--line);padding:12px 20px;display:flex;align-items:center;gap:16px;position:sticky;top:0;z-index:5}
header.top{display:block;padding:0}
.topin{max-width:980px;margin:0 auto;padding:10px 16px;display:flex;align-items:center;gap:16px}
.brand{display:flex;align-items:center;gap:10px;font-weight:700;font-size:17px;color:var(--ink)}
.brand:hover{text-decoration:none}
.brand small{display:block;font-size:11px;font-weight:400;color:var(--mut);line-height:1.1}
.brand .logo{width:34px;height:34px;border-radius:9px;background:var(--pri);color:#fff;display:flex;align-items:center;justify-content:center;font-size:18px}
.topin nav{margin-left:auto;display:flex;align-items:center;gap:14px}
.topin .who{color:var(--mut);font-size:14px}
.topin a.ghost{border:1px solid var(--line);border-radius:8px;padding:5px 12px;color:var(--ink);font-size:14px}
.foot{text-align:center;color:var(--mut);font-size:13px;padding:24px 0 40px}
main{max-width:980px;margin:0 auto;padding:24px 16px 60px}
.pt{font-size:24px;margin:8px 0 16px}
.card{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:20px 22px;margin:14px 0;box-shadow:0 1px 2px rgba(20,30,50,.04)}
.card h2{margin:0 0 6px;font-size:19px}
.card h3{margin:16px 0 4px;font-size:14px;color:var(--mut);font-weight:600}
.meta{color:var(--mut);font-size:14px}
.tag{display:inline-block;background:#eef3ff;color:var(--pri);border-radius:999px;padding:2px 10px;font-size:13px;margin-left:6px;font-weight:600;vertical-align:middle}
.btn{display:inline-block;background:var(--pri);color:#fff;border:0;border-radius:8px;padding:10px 18px;font:inherit;font-weight:600;cursor:pointer}
.btn:hover{filter:brightness(1.08);text-decoration:none}
.btn.ghost{background:#fff;color:var(--pri);border:1px solid var(--pri)}
.btn[disabled],.btn.off{background:#c8cfdb;color:#fff;cursor:not-allowed}
.bar{height:8px;background:#e8edf5;border-radius:99px;overflow:hidden;margin:8px 0}
.bar i{display:block;height:100%;background:var(--pri)}
.bar.done i{background:var(--ok)}
.lessons{list-style:none;margin:0;padding:0}
.lessons li.lesson{margin:10px 0;padding:14px 18px 10px}
.lessons li.lesson>a{display:flex;gap:14px;align-items:center;color:var(--ink)}
.lessons li.lesson>a:hover{text-decoration:none}
.lessons li.lesson:hover{border-color:var(--pri)}
.lessons .no{width:40px;height:40px;border-radius:50%;background:#eef3ff;color:var(--pri);display:flex;align-items:center;justify-content:center;font-weight:700;flex:none}
.lessons .is-done .no{background:var(--ok);color:#fff}
.lessons .ti{flex:1;min-width:0;font-weight:600}
.lessons .ti small{display:block;font-weight:400;color:var(--mut);font-size:13px}
.lessons .pc{color:var(--mut);font-size:14px;white-space:nowrap}
.lessons .pc .ok{font-style:normal;color:var(--ok);font-weight:700}
.lessons .is-done .bar i{background:var(--ok)}
/* 로그인 */
.login{max-width:420px;margin:60px auto;text-align:center;padding:36px 28px}
.login .logo.big{width:64px;height:64px;border-radius:16px;background:var(--pri);color:#fff;font-size:32px;font-weight:700;display:flex;align-items:center;justify-content:center;margin:0 auto 12px}
.login h1{margin:4px 0}
.login .sub{color:var(--mut);margin:4px 0 22px}
.login .ja{font-size:14px}
.g_id_signin{display:flex;justify-content:center;min-height:44px}
.err:empty{display:none}
/* 관리자 요약 */
.adminbox{border:2px solid #1c2430;background:#fbfcff}
.adminbox .ah{display:flex;justify-content:space-between;align-items:baseline;flex-wrap:wrap;gap:6px}
.kpis{display:grid;grid-template-columns:repeat(auto-fit,minmax(130px,1fr));gap:10px;margin:12px 0}
.kpi{background:#fff;border:1px solid var(--line);border-radius:10px;padding:12px;color:var(--ink);text-align:center}
.kpi:hover{text-decoration:none;border-color:var(--pri)}
.kpi b{display:block;font-size:26px;line-height:1.2}
.kpi span{font-size:13px;color:var(--mut)}
.kpi.hot{border-color:var(--ng);background:#fff6f5}
.kpi.hot b{color:var(--ng)}
.adminbox .links{margin:4px 0 0}
.topin nav a[href="/admin.php"]{background:#1c2430;color:#fff;border-radius:8px;padding:5px 12px;font-size:14px}
.regform{text-align:left;margin-top:8px}
.regform input{margin-top:2px}
.sh{font-size:17px;margin:22px 0 8px}
.btn.sm{padding:4px 10px;font-size:13px}
/* 공통 */
.crumb{font-size:14px;color:var(--mut);margin:0 0 4px}
.lead{color:var(--mut);margin:-6px 0 18px}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:16px}
.grid .card{margin:0}
a.course{display:block;color:var(--ink);transition:border-color .15s,box-shadow .15s}
a.course:hover{text-decoration:none;border-color:var(--pri);box-shadow:0 4px 14px rgba(36,87,214,.12)}
a.course h2{margin:10px 0 4px;font-size:18px;line-height:1.4}
.tags{display:flex;gap:6px;flex-wrap:wrap}
.lang{display:inline-block;background:#eef3ff;color:var(--pri);border-radius:999px;padding:2px 10px;font-size:13px;font-weight:600;vertical-align:middle}
h1 .lang{font-size:14px;position:relative;top:-3px}
.st.new{background:#eef1f6;color:var(--mut)}
.st.go,.st.wait{background:#fff3d6;color:var(--warn)}
.st.task{background:#eef3ff;color:var(--pri)}
.st.done{background:#dff5e8;color:var(--ok)}
.sum b{font-size:22px}
.task h2{margin-bottom:8px}
.task.locked{background:#f7f9fc;color:var(--mut)}
.cmt{background:#eef3ff;border-radius:8px;padding:10px 12px}
.okbox{background:#dff5e8;border-color:#a9dcc0;color:#14693c}
.brief ul{padding-left:20px;margin:8px 0 0}
.brief li{margin:4px 0}
.form label b{display:block}
.form label small{display:block;font-weight:400;color:var(--mut);font-size:13px;margin:2px 0 6px}
.btn.big{padding:13px 28px;font-size:17px;margin-top:18px}
.player{padding:14px}
.pinfo{display:flex;justify-content:space-between;align-items:center;gap:12px;flex-wrap:wrap;margin-top:12px}
.pinfo #st{color:var(--mut);font-size:14px}
.pinfo .nav{display:flex;gap:8px}
.st{display:inline-block;border-radius:999px;padding:2px 10px;font-size:13px;font-weight:600;background:#eef1f6;color:var(--mut)}
.st.submitted{background:#fff3d6;color:var(--warn)}
.st.approved{background:#dff5e8;color:var(--ok)}
.st.returned{background:#fde4e2;color:var(--ng)}
video{width:100%;max-height:70vh;background:#000;border-radius:10px}
label{display:block;font-weight:600;margin:16px 0 4px}
textarea,input[type=text],input[type=file],select{width:100%;font:inherit;padding:10px 12px;border:1px solid #cbd3df;border-radius:8px;background:#fff}
select{width:auto}
textarea{resize:vertical}
.hint{color:var(--mut);font-size:13px;margin:2px 0 0}
.note{background:#fff8e6;border:1px solid #f1dca0;border-radius:8px;padding:10px 14px;margin:12px 0}
.err{background:#fde4e2;border:1px solid #f3b9b4;color:#8f2019;border-radius:8px;padding:10px 14px;margin:12px 0}
.okmsg{background:#dff5e8;border:1px solid #a9dcc0;color:#14693c;border-radius:8px;padding:10px 14px;margin:12px 0}
.center{text-align:center;padding:60px 20px}
.tabs{display:flex;gap:6px;align-items:center;flex-wrap:wrap;margin-bottom:14px;border-bottom:1px solid var(--line)}
.tabs a{padding:10px 16px;color:var(--mut);font-weight:600;border-bottom:3px solid transparent}
.tabs a.on{color:var(--pri);border-color:var(--pri)}
.tabs select{margin-left:auto;margin-bottom:6px}
.badge{background:var(--ng);color:#fff;border-radius:99px;font-style:normal;font-size:12px;padding:1px 7px}
.tblwrap{overflow-x:auto;background:#fff;border:1px solid var(--line);border-radius:10px}
.tbl{border-collapse:collapse;width:100%;font-size:14px}
.tbl th,.tbl td{padding:8px 10px;border-bottom:1px solid var(--line);text-align:left;white-space:nowrap}
.tbl th{background:#f7f9fc;font-weight:600;color:var(--mut)}
.tbl td.c{text-align:center}
.tbl td.ok{background:#dff5e8;color:var(--ok);font-weight:700}
.tbl td.go{background:#fff3d6;color:var(--warn)}
.ans{white-space:normal;background:#f7f9fc;border-radius:8px;padding:10px 12px;margin:0}
.review{margin-top:16px;border-top:1px dashed var(--line);padding-top:12px}
.review textarea{margin-bottom:10px}
@media(max-width:640px){main{padding:14px 10px 40px}.card{padding:16px}.brand small{display:none}.topin nav{gap:8px}.login{margin:24px auto}.pinfo .nav{width:100%}.pinfo .nav .btn{flex:1;text-align:center}}