/* File: /public/assets/css/app.css
 * Module: PrimeUI
 * Purpose: 공통 UI(헤더/푸터/카드/버튼/테이블/폼/모달) - 깔끔/세련 스타일
 * Version: v1.2 (2025-12-30)
 */

:root{
  --bg:#f6f7fb;
  --card:#ffffff;
  --text:#111827;
  --muted:#6b7280;
  --line:#e5e7eb;
  --shadow: 0 10px 30px rgba(0,0,0,.08);
  --radius: 16px;

  --btn:#111827;
  --btnText:#ffffff;
}

*{ box-sizing:border-box; }
html,body{ height:100%; }
body{
  margin:0;
  font-family: system-ui, -apple-system, "Noto Sans KR", Segoe UI, Roboto, Arial, sans-serif;
  background:var(--bg);
  color:var(--text);
}

a{ color:inherit; text-decoration:none; }
.container{ max-width:1100px; margin:0 auto; padding:24px 16px 56px; }

/* ===== Header ===== */
.topbar{
  position:sticky; top:0;
  background: rgba(246,247,251,.85);
  backdrop-filter: blur(10px);
  border-bottom:1px solid var(--line);
  z-index:10;
}
.topbar-inner{
  max-width:1100px; margin:0 auto;
  display:flex; align-items:center; gap:16px;
  padding:14px 16px;
}
.brand{
  font-weight:900;
  letter-spacing:-.3px;
  font-size:18px;
}
.nav{
  display:flex; gap:10px;
  margin:0 auto;
}
.nav a{
  padding:10px 12px;
  border-radius:12px;
  color:var(--muted);
  font-weight:800;
  font-size:14px;
}
.nav a:hover{
  background:#fff;
  color:var(--text);
  box-shadow:0 1px 0 rgba(0,0,0,.04);
}
.userbox{ display:flex; gap:10px; }

/* ===== Footer ===== */
.footer{
  border-top:1px solid var(--line);
  background:#fff;
}
.footer-inner{
  max-width:1100px; margin:0 auto;
  padding:16px;
  display:flex; justify-content:space-between; gap:12px;
  color:var(--muted);
  font-size:13px;
}

/* ===== Basic Blocks ===== */
.card{
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--radius);
  box-shadow: var(--shadow);
  padding:16px;
}

.hstack{ display:flex; align-items:center; gap:10px; }
.spacer{ flex:1; }
.muted{ color:var(--muted); }

.card-head{ display:flex; align-items:flex-start; gap:12px; }
.card-title{ font-weight:900; font-size:18px; letter-spacing:-.2px; }
.card-sub{ margin-top:6px; color:var(--muted); font-size:13px; }

/* ===== Buttons ===== */
.btn{
  display:inline-flex; align-items:center; justify-content:center;
  height:38px; padding:0 14px;
  border-radius:12px;
  border:1px solid transparent;
  background:var(--btn);
  color:var(--btnText);
  cursor:pointer;
  font-weight:900;
  letter-spacing:-.1px;
}
.btn.ghost{
  background:#fff;
  color:var(--text);
  border-color:var(--line);
}
.btn.ghost:hover{ box-shadow:0 6px 16px rgba(0,0,0,.08); }
.btn.sm{ height:34px; padding:0 12px; border-radius:11px; }

/* ===== Inputs / Toolbar ===== */
.toolbar{
  display:flex; align-items:center; gap:10px;
  padding:12px;
  border:1px solid var(--line);
  background:#fff;
  border-radius:14px;
}
.input{
  width:100%;
  height:40px;
  border:1px solid var(--line);
  border-radius:12px;
  padding:0 12px;
  font-size:14px;
  outline:none;
  background:#fff;
}
.input:focus{
  border-color:#c7d2fe;
  box-shadow:0 0 0 4px rgba(99,102,241,.12);
}

/* ===== Table (표 디자인 핵심) ===== */
.table-wrap{
  margin-top:14px;
  border:1px solid var(--line);
  border-radius:14px;
  overflow:hidden;
  background:#fff;
}
.table{
  width:100%;
  border-collapse:separate;
  border-spacing:0;
}
.table th, .table td{
  padding:12px 12px;
  border-bottom:1px solid var(--line);
  text-align:left;
  font-size:14px;
  vertical-align:middle;
}
.table th{
  color:var(--muted);
  font-weight:900;
  background:#fafafa;
}
.table tr:hover td{
  background:#fbfbfd;
}
.table tr:last-child td{ border-bottom:none; }

/* ===== Badge ===== */
.badge{
  display:inline-flex; align-items:center; justify-content:center;
  padding:6px 10px;
  border-radius:999px;
  border:1px solid var(--line);
  font-size:12px;
  font-weight:900;
  letter-spacing:-.1px;
  background:#fff;
}
.badge.ok{
  background:rgba(16,185,129,.08);
  border-color:rgba(16,185,129,.25);
}
.badge.off{
  background:rgba(107,114,128,.10);
  border-color:rgba(107,114,128,.25);
}

/* ===== Form ===== */
.form-grid{ display:grid; gap:12px; }
.grid-2{ display:grid; grid-template-columns: 1fr 1fr; gap:12px; }
@media (max-width: 720px){ .grid-2{ grid-template-columns: 1fr; } }

.field{ display:grid; gap:6px; }
.field label{ font-size:13px; color:var(--muted); font-weight:900; }
.field input, .field select, .field textarea{
  width:100%;
  border:1px solid var(--line);
  border-radius:12px;
  padding:10px 12px;
  font-size:14px;
  outline:none;
  background:#fff;
}
.field textarea{ resize:vertical; }
.field input:focus, .field textarea:focus, .field select:focus{
  border-color:#c7d2fe;
  box-shadow:0 0 0 4px rgba(99,102,241,.12);
}

/* ===== Child Modal ===== */
.modal-root{
  position:fixed; inset:0;
  display:none;
  background: rgba(0,0,0,.35);
  z-index:1000;
}
.modal-root.open{ display:flex; align-items:center; justify-content:center; padding:18px; }
.modal-panel{
  width:min(760px, 100%);
  background:#fff;
  border-radius:18px;
  box-shadow: var(--shadow);
  border:1px solid rgba(255,255,255,.4);
  overflow:hidden;
}
.modal-head{
  display:flex; align-items:center;
  padding:14px 16px;
  border-bottom:1px solid var(--line);
  background:#fff;
}
.modal-title{
  font-size:15px;
  font-weight:900;
}
.icon-btn{
  margin-left:auto;
  width:36px; height:36px;
  border-radius:12px;
  border:1px solid var(--line);
  background:#fff;
  cursor:pointer;
  font-size:20px; line-height:1;
}
.modal-body{
  padding:16px;
  max-height: calc(100vh - 220px);
  overflow:auto;
}
.modal-foot{ padding:14px 16px; border-top:1px solid var(--line); }

/* ===== Students: Status badge variants + Pager v1.0 ===== */

.badge.new{
  background: rgba(59,130,246,.10);
  border-color: rgba(59,130,246,.22);
}
.badge.enrolled{
  background: rgba(16,185,129,.10);
  border-color: rgba(16,185,129,.22);
}
.badge.paused{
  background: rgba(245,158,11,.12);
  border-color: rgba(245,158,11,.24);
}
.badge.withdrawn{
  background: rgba(239,68,68,.10);
  border-color: rgba(239,68,68,.22);
}

.pager{
  margin-top:14px;
  display:flex;
  align-items:center;
  gap:10px;
}
.pager-links{
  display:flex;
  align-items:center;
  gap:6px;
  flex-wrap:wrap;
}
.page-link{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  height:34px;
  padding:0 10px;
  border-radius:11px;
  border:1px solid var(--line);
  background:#fff;
  color:var(--text);
  font-weight:900;
  font-size:13px;
}
.page-link:hover{
  box-shadow:0 6px 16px rgba(0,0,0,.08);
}
.page-link.active{
  background: var(--btn);
  color: var(--btnText);
  border-color: transparent;
}
.page-link.disabled{
  opacity:.45;
  pointer-events:none;
}

/* ===== Timetable (Week Board) v1.0 ===== */
.week-wrap{
  margin-top:14px;
  border:1px solid var(--line);
  border-radius:14px;
  background:#fff;
  overflow:auto;
}
.week-board{
  min-width: 980px;
  display:grid;
  grid-template-columns: repeat(7, 1fr);
  gap:0;
}
.day-col{
  border-right:1px solid var(--line);
  min-height: 220px;
}
.day-col:last-child{ border-right:none; }

.day-head{
  position:sticky; top:0;
  background:#fafafa;
  border-bottom:1px solid var(--line);
  padding:10px 12px;
  font-weight:900;
  color:var(--muted);
}
.day-body{ padding:10px 12px; display:grid; gap:8px; }

.slot-card{
  border:1px solid var(--line);
  border-radius:12px;
  padding:10px 10px;
  background:#fff;
}
.slot-time{
  font-weight:900;
  font-size:12px;
  color:var(--muted);
}
.slot-title{
  margin-top:4px;
  font-weight:900;
  font-size:14px;
}
.slot-sub{
  margin-top:4px;
  color:var(--muted);
  font-size:12px;
}
.slot-actions{ margin-top:8px; display:flex; gap:6px; flex-wrap:wrap; }

/* ===== Attendance v1.0 ===== */
.session-strip{
  display:flex; gap:10px; flex-wrap:wrap;
}
.session-pill{
  border:1px solid var(--line);
  background:#fff;
  border-radius:14px;
  padding:10px 12px;
  min-width: 220px;
}
.session-pill.active{
  border-color:#c7d2fe;
  box-shadow:0 0 0 4px rgba(99,102,241,.10);
}
.session-pill .t1{ font-weight:900; }
.session-pill .t2{ margin-top:4px; font-size:12px; color:var(--muted); }
.session-pill .t3{ margin-top:8px; display:flex; gap:6px; flex-wrap:wrap; font-size:12px; color:var(--muted); }
.kpi{ display:inline-flex; gap:6px; align-items:center; border:1px solid var(--line); border-radius:999px; padding:4px 8px; background:#fff; }

.seg{
  display:inline-flex;
  border:1px solid var(--line);
  border-radius:12px;
  overflow:hidden;
  background:#fff;
}
.seg button{
  border:0;
  background:transparent;
  padding:8px 10px;
  font-weight:900;
  font-size:13px;
  cursor:pointer;
}
.seg button + button{ border-left:1px solid var(--line); }
.seg button.on{
  background:var(--btn);
  color:var(--btnText);
}
.seg button.off{ color:var(--muted); }

.badge.pending{ background:rgba(245,158,11,.12); border-color:rgba(245,158,11,.24); }
.badge.scheduled{ background:rgba(59,130,246,.10); border-color:rgba(59,130,246,.22); }