:root {
  --bg: #f7f6f3;
  --surface: #ffffff;
  --surface-2: #f1f0ec;
  --ink: #1c1c21;
  --ink-2: #5c5c66;
  --ink-3: #9a9aa4;
  --line: #e6e4de;
  --primary: #1e3a6e;
  --primary-soft: #eaeef7;
  --primary-ink: #16294e;
  --gold: #b78f3e;
  --gold-soft: #f7f0e0;
  --teal: #0f6e56;
  --teal-soft: #e1f5ee;
  --amber: #854f0b;
  --amber-soft: #faeeda;
  --red: #a32d2d;
  --red-soft: #fcebeb;
  --radius: 12px;
  --shadow: 0 1px 2px rgba(28, 28, 33, .04), 0 8px 24px rgba(28, 28, 33, .05);
}
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: "Pretendard Variable", Pretendard, -apple-system, "Malgun Gothic", sans-serif;
  background: var(--bg);
  color: var(--ink);
  font-size: 15px;
  line-height: 1.55;
}
a { color: inherit; text-decoration: none; }

/* ---- 레이아웃 ---- */
.shell { display: flex; min-height: 100vh; }
.sidebar {
  width: 224px; flex: none;
  background: var(--surface);
  border-right: 1px solid var(--line);
  padding: 20px 14px;
  display: flex; flex-direction: column; gap: 4px;
  position: sticky; top: 0; height: 100vh;
}
.logo {
  display: flex; align-items: center; gap: 10px;
  font-weight: 700; font-size: 16px; padding: 4px 10px 18px;
  letter-spacing: -.01em;
}
.logo .mark {
  width: 30px; height: 30px; border-radius: 9px;
  background: var(--primary); color: #fff;
  display: flex; align-items: center; justify-content: center;
  font-size: 15px; font-weight: 800;
}
.nav a {
  display: flex; align-items: center; gap: 10px;
  padding: 9px 12px; border-radius: 9px;
  color: var(--ink-2); font-weight: 500; font-size: 14px;
  transition: background .12s, color .12s;
}
.nav a:hover { background: var(--surface-2); color: var(--ink); }
.nav a.on { background: var(--primary-soft); color: var(--primary-ink); font-weight: 600; }
.nav svg { width: 17px; height: 17px; flex: none; }
.side-foot { margin-top: auto; font-size: 12px; color: var(--ink-3); padding: 10px 12px; }
.side-foot b { display: block; color: var(--ink-2); font-weight: 600; }
.side-foot a { color: var(--primary); font-weight: 600; }

.main { flex: 1; padding: 30px 38px 60px; max-width: 1120px; }
.page-head { display: flex; align-items: flex-end; justify-content: space-between; margin-bottom: 22px; }
.page-head h1 { font-size: 21px; margin: 0; letter-spacing: -.01em; }
.page-head p { margin: 3px 0 0; color: var(--ink-2); font-size: 13.5px; }

/* ---- 카드 ---- */
.card {
  background: var(--surface); border: 1px solid var(--line);
  border-radius: var(--radius); box-shadow: var(--shadow);
  padding: 20px 22px;
}
.grid { display: grid; gap: 14px; }
.grid.c3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid.c4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.stat { padding: 16px 18px; }
.stat .k { font-size: 12.5px; color: var(--ink-3); font-weight: 600; }
.stat .v { font-size: 26px; font-weight: 700; letter-spacing: -.02em; margin-top: 2px; }
.stat .v small { font-size: 14px; font-weight: 500; color: var(--ink-3); }
.stat.warn { background: var(--amber-soft); border-color: #f0dcb8; }
.stat.warn .k, .stat.warn .v { color: var(--amber); }

/* ---- 테이블 ---- */
table.list { width: 100%; border-collapse: collapse; font-size: 14px; }
table.list th {
  text-align: left; font-size: 12px; color: var(--ink-3);
  font-weight: 600; padding: 8px 10px; border-bottom: 1px solid var(--line);
}
table.list td { padding: 11px 10px; border-bottom: 1px solid var(--line); }
table.list tr:last-child td { border-bottom: 0; }
table.list tr:hover td { background: #fbfaf8; }

/* ---- 배지 · 버튼 ---- */
.badge {
  display: inline-block; font-size: 12px; font-weight: 600;
  padding: 3px 10px; border-radius: 99px;
}
.badge.teal { background: var(--teal-soft); color: var(--teal); }
.badge.amber { background: var(--amber-soft); color: var(--amber); }
.badge.red { background: var(--red-soft); color: var(--red); }
.badge.gray { background: var(--surface-2); color: var(--ink-2); }
.badge.primary { background: var(--primary-soft); color: var(--primary-ink); }

.btn {
  display: inline-flex; align-items: center; gap: 7px;
  padding: 9px 16px; border-radius: 9px; border: 1px solid var(--line);
  background: var(--surface); color: var(--ink); font-weight: 600;
  font-size: 13.5px; cursor: pointer; transition: all .12s;
  font-family: inherit;
}
.btn:hover { border-color: #cfcdc5; background: #fbfaf8; }
.btn.primary { background: var(--primary); border-color: var(--primary); color: #fff; }
.btn.primary:hover { background: #3a48c0; }
.btn.small { padding: 5px 11px; font-size: 12.5px; border-radius: 7px; }
.btn.danger { color: var(--red); }
.btn.danger:hover { background: var(--red-soft); border-color: #eccaca; }

/* ---- 폼 ---- */
label.f { display: block; font-size: 12.5px; font-weight: 600; color: var(--ink-2); margin: 0 0 5px; }
input[type=text], input[type=email], input[type=password], input[type=number], select, textarea {
  width: 100%; padding: 9px 12px; border: 1px solid var(--line);
  border-radius: 9px; font-size: 14px; font-family: inherit;
  background: var(--surface); color: var(--ink); outline: none;
  transition: border .12s, box-shadow .12s;
}
input:focus, select:focus, textarea:focus {
  border-color: var(--primary); box-shadow: 0 0 0 3px var(--primary-soft);
}
.frow { display: flex; gap: 12px; }
.frow > div { flex: 1; }

/* ---- 단계 선택 카드 ---- */
.step-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; }
.step-card input { display: none; }
.step-card span.box {
  display: block; padding: 12px 14px; border: 1.5px solid var(--line);
  border-radius: 10px; cursor: pointer; transition: all .12s;
  background: var(--surface); height: 100%;
}
.step-card:hover span.box { border-color: #cfcdc5; }
.step-card input:checked + span.box {
  border-color: var(--primary); background: var(--primary-soft);
}
.step-card .sid { font-size: 12px; font-weight: 700; color: var(--primary-ink); }
.step-card .snm { font-size: 13px; font-weight: 600; margin-top: 2px; }
.step-card .scd { font-size: 11.5px; color: var(--ink-3); margin-top: 3px; }

.stu-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 8px; }
.stu-pick input { display: none; }
.stu-pick span {
  display: flex; align-items: center; gap: 7px;
  padding: 8px 12px; border: 1.5px solid var(--line); border-radius: 9px;
  cursor: pointer; font-size: 13.5px; font-weight: 500; transition: all .12s;
}
.stu-pick input:checked + span {
  border-color: var(--primary); background: var(--primary-soft); font-weight: 600;
}
.stu-pick .g { font-size: 11.5px; color: var(--ink-3); }

/* ---- 로그인 ---- */
.auth-wrap {
  min-height: 100vh; display: flex; align-items: center; justify-content: center;
  background: var(--bg); padding: 20px;
}
.auth-card {
  width: 400px; background: var(--surface); border: 1px solid var(--line);
  border-radius: 16px; box-shadow: var(--shadow); padding: 34px 34px 28px;
}
.auth-card .logo { padding: 0 0 6px; }
.auth-card h1 { font-size: 19px; margin: 0 0 4px; }
.auth-card .sub { color: var(--ink-2); font-size: 13.5px; margin: 0 0 20px; }
.auth-card .field { margin-bottom: 14px; }
.alert {
  background: var(--red-soft); color: var(--red); border-radius: 9px;
  padding: 10px 14px; font-size: 13px; font-weight: 500; margin-bottom: 14px;
}
.note {
  background: var(--surface-2); color: var(--ink-2); border-radius: 9px;
  padding: 10px 14px; font-size: 12.5px; margin-top: 16px; line-height: 1.6;
}

/* ---- 빈 상태 ---- */
.empty {
  text-align: center; padding: 52px 20px; color: var(--ink-3);
}
.empty .big { font-size: 34px; margin-bottom: 8px; }
.empty b { display: block; color: var(--ink-2); font-size: 15px; margin-bottom: 4px; }
.empty p { font-size: 13.5px; margin: 0; }

/* ---- 모바일 업로드 ---- */
.mob-wrap { max-width: 430px; margin: 0 auto; padding: 26px 20px 50px; }
.mob-wrap .card { padding: 22px; }
.drop {
  border: 1.5px dashed #c9c7bf; border-radius: 12px; padding: 34px 16px;
  text-align: center; color: var(--ink-2); font-size: 14px; margin: 16px 0;
}

.mt0 { margin-top: 0; } .mt16 { margin-top: 16px; } .mt24 { margin-top: 24px; }
.mb8 { margin-bottom: 8px; } .mb16 { margin-bottom: 16px; }
.muted { color: var(--ink-3); font-size: 12.5px; }
h2.sec { font-size: 15px; margin: 0 0 12px; letter-spacing: -.01em; }
.row-end { display: flex; justify-content: flex-end; gap: 10px; margin-top: 18px; }

@media (max-width: 900px) {
  .sidebar { display: none; }
  .main { padding: 20px; }
  .grid.c3, .grid.c4 { grid-template-columns: 1fr 1fr; }
  .step-grid { grid-template-columns: 1fr 1fr; }
  .stu-grid { grid-template-columns: 1fr 1fr; }
}