:root{--bg:#f7fbff;--card:#fff;--ink:#1d2939;--muted:#667085;--blue:#2563eb;--green:#16a34a;--orange:#f97316;--pink:#ec4899;--line:#e5e7eb;--soft:#eef6ff}*{box-sizing:border-box}body{margin:0;font-family:Inter,Apple SD Gothic Neo,Noto Sans KR,Arial,sans-serif;background:var(--bg);color:var(--ink)}a{text-decoration:none;color:inherit}.layout{display:grid;grid-template-columns:260px 1fr;min-height:100vh}.side{background:#101828;color:#fff;padding:24px;position:sticky;top:0;height:100vh}.logo{font-weight:900;font-size:22px;margin-bottom:24px}.nav a{display:block;padding:12px 14px;border-radius:12px;color:#d0d5dd;margin-bottom:6px}.nav a.active,.nav a:hover{background:#1d2939;color:#fff}.main{padding:28px}.top{display:flex;justify-content:space-between;align-items:center;margin-bottom:22px}.badge{display:inline-flex;align-items:center;padding:6px 10px;border-radius:999px;background:#e0f2fe;color:#0369a1;font-weight:700;font-size:12px}.grid{display:grid;gap:18px}.grid-2{grid-template-columns:repeat(2,minmax(0,1fr))}.grid-3{grid-template-columns:repeat(3,minmax(0,1fr))}.grid-4{grid-template-columns:repeat(4,minmax(0,1fr))}.card{background:var(--card);border:1px solid var(--line);border-radius:22px;padding:22px;box-shadow:0 10px 30px rgba(16,24,40,.05)}.kpi{font-size:32px;font-weight:900;margin:6px 0}.muted{color:var(--muted)}.btn{border:0;border-radius:12px;padding:11px 16px;font-weight:800;background:var(--blue);color:#fff;display:inline-block}.btn.light{background:#eef2ff;color:#3730a3}.btn.green{background:var(--green)}.btn.orange{background:var(--orange)}.btn.gray{background:#f2f4f7;color:#344054}.table{width:100%;border-collapse:collapse;background:#fff;border-radius:18px;overflow:hidden}.table th,.table td{padding:14px;border-bottom:1px solid var(--line);text-align:left;font-size:14px}.table th{background:#f9fafb;color:#475467}.status{padding:5px 9px;border-radius:999px;font-size:12px;font-weight:800}.pending{background:#fff7ed;color:#c2410c}.approved{background:#ecfdf3;color:#067647}.paid{background:#eef4ff;color:#3538cd}.danger{background:#fef3f2;color:#b42318}.hero{padding:54px 36px;background:linear-gradient(135deg,#dbeafe,#fce7f3);border-radius:30px}.hero h1{font-size:44px;margin:0 0 12px;line-height:1.08}.flow{display:flex;gap:10px;flex-wrap:wrap}.flow span{background:#fff;border:1px solid var(--line);border-radius:999px;padding:10px 14px;font-weight:800}.phone{max-width:390px;margin:auto;background:#101828;border-radius:38px;padding:14px}.screen{background:#f7fbff;border-radius:28px;padding:18px;min-height:690px}.mission{display:flex;align-items:center;gap:12px;padding:14px;border-radius:18px;background:#fff;border:1px solid var(--line);margin-bottom:12px}.circle{width:42px;height:42px;border-radius:50%;display:grid;place-items:center;background:#e0f2fe;font-weight:900}.progress{height:10px;background:#e5e7eb;border-radius:99px;overflow:hidden}.progress div{height:100%;background:linear-gradient(90deg,#2563eb,#16a34a)}.record{width:150px;height:150px;border-radius:50%;background:#ef4444;color:#fff;display:grid;place-items:center;font-size:22px;font-weight:900;margin:22px auto;box-shadow:0 15px 40px rgba(239,68,68,.35)}.chart{display:flex;align-items:end;gap:10px;height:160px}.bar{flex:1;background:#bfdbfe;border-radius:10px 10px 0 0;min-height:20px;position:relative}.bar b{position:absolute;top:-24px;left:50%;transform:translateX(-50%);font-size:12px}.form input,.form select,.form textarea{width:100%;padding:13px;border:1px solid var(--line);border-radius:12px;margin:7px 0 14px;background:#fff}.tabs{display:flex;gap:8px;margin-bottom:16px;flex-wrap:wrap}.tabs span{padding:8px 12px;border-radius:999px;background:#eef2ff;color:#3730a3;font-weight:800;font-size:13px}@media(max-width:900px){.layout{grid-template-columns:1fr}.side{position:relative;height:auto}.grid-2,.grid-3,.grid-4{grid-template-columns:1fr}.hero h1{font-size:32px}}


/* Feedback extension components */
.feedback-row{display:grid;grid-template-columns:1fr auto 1fr 160px;gap:10px;align-items:center;margin:10px 0}
.feedback-row input,.feedback-row select,textarea,input,select{border:1px solid #e2e8f0;border-radius:14px;padding:12px;font:inherit;background:white;width:100%;box-sizing:border-box}textarea{min-height:120px}.actions{display:flex;gap:10px;justify-content:flex-end}.pill{display:inline-flex;padding:5px 10px;border-radius:999px;background:#eef2ff;color:#4338ca;font-size:12px}.pill.warn{background:#fff7ed;color:#c2410c}.hero{display:flex;align-items:center;justify-content:space-between;padding:24px;border-radius:28px;background:linear-gradient(135deg,#eef2ff,#fff7ed);margin:18px 0}.hero strong{font-size:42px}.grid.four{grid-template-columns:repeat(4,1fr)}.clean{list-style:none;padding:0}.clean li{padding:12px;border-bottom:1px solid #edf2f7}.phone{max-width:390px;margin:20px auto;border:10px solid #111827;border-radius:36px;min-height:780px;background:#f8fafc;overflow:hidden;box-shadow:0 20px 50px rgba(0,0,0,.18)}.appbar{padding:18px;text-align:center;font-weight:800;background:white;border-bottom:1px solid #e5e7eb}.app-hero{margin:16px;padding:22px;border-radius:26px;background:linear-gradient(135deg,#dbeafe,#fef3c7)}.app-hero h1{margin:4px 0 0}.progress{height:12px;background:white;border-radius:999px;overflow:hidden}.progress span{display:block;height:100%;background:#22c55e}.mission-card,.teacher-card{margin:16px;padding:18px;background:white;border-radius:22px;box-shadow:0 8px 24px rgba(15,23,42,.08)}.bigbtn{width:100%;border:0;border-radius:18px;padding:16px;margin-top:10px;background:#2563eb;color:#fff;font-weight:800;font-size:16px}.bigbtn.secondary{background:#f59e0b}.bottomnav{display:flex;justify-content:space-around;position:sticky;bottom:0;background:white;padding:16px}.bottomnav .active{font-weight:800;color:#2563eb}.mistake{margin:16px;padding:18px;border-radius:20px;background:#fee2e2;color:#991b1b;font-size:20px;font-weight:800}.wordblocks,.choices,.attempts{display:flex;gap:10px;flex-wrap:wrap;padding:16px}.wordblocks button,.choices button,.attempts span{border:0;background:white;border-radius:16px;padding:14px;box-shadow:0 4px 14px rgba(0,0,0,.08);font-weight:800}.choices{flex-direction:column}.answerbox{margin:16px;padding:18px;border:2px dashed #22c55e;border-radius:20px;background:#f0fdf4}.avatar{width:48px;height:48px;background:#2563eb;color:#fff;border-radius:50%;display:grid;place-items:center;font-weight:900}.teacher-card{display:flex;gap:14px;align-items:center}.growth-character{text-align:center;font-size:52px;padding:30px}.note{color:#64748b}
@media(max-width:800px){.grid.four{grid-template-columns:1fr 1fr}.feedback-row{grid-template-columns:1fr}.hero{display:block}.shell{display:block}.side{position:static;width:auto}.main{padding:16px}}