/* 관리자 페이지: 왼쪽 게임 메뉴 + 게임별 화면(목록 | 상세) */
* { box-sizing: border-box; }
:root { --bg: #0b0f17; --panel: #161d2b; --panel2: #0f1522; --line: #2a3550; --line2: #253049; --text: #e8ecf4;
  --sub: #9aa7c2; --muted: #6f7c98; --green: #22c55e; --red: #ef4444; --yellow: #fbbf24; --blue: #60a5fa; }
body { margin: 0; background: var(--bg); color: var(--text); }
a { color: var(--yellow); }
h1, h2, h3 { margin: 0; }
h2 { font-size: 17px; margin-bottom: 10px; }
.hidden { display: none !important; }
/* 게임 화면은 admin.js 가 고른 것만 보임 (스크립트가 실패해도 다 쏟아져 나오지 않게) */
section.game:not(.on), section.game [data-view]:not(.on) { display: none; }
.muted { color: var(--muted); font-size: 13px; }
.error { color: #ff7676; }
.row { display: flex; gap: 8px; flex-wrap: wrap; align-items: center; }
.spacer { flex: 1; }
.scroll { overflow-x: auto; }

button { padding: 9px 14px; border: 0; border-radius: 9px; font-weight: 700; font-size: 14px; cursor: pointer;
  background: #334155; color: #fff; white-space: nowrap; }
button:hover { filter: brightness(1.12); }
button:disabled { opacity: .45; cursor: default; filter: none; }
button.go { background: var(--green); color: #05210f; }
button.stop { background: var(--red); }
button.ghost { background: transparent; border: 1px solid var(--line); color: var(--sub); }
button.danger-ghost { background: transparent; border: 1px solid #5b2330; color: #fca5a5; }
button.small { padding: 5px 10px; font-size: 13px; }
button.big { padding: 13px 22px; font-size: 16px; }
button.on { outline: 2px solid var(--yellow); }
select, input { padding: 9px 11px; border-radius: 9px; border: 1px solid #33405e; background: var(--panel2); color: #fff; font-size: 14px; }
table { width: 100%; border-collapse: collapse; font-size: 14px; }
th, td { padding: 7px 8px; border-bottom: 1px solid var(--line2); text-align: left; }
th { color: var(--sub); font-weight: normal; }
th.num, td.num { text-align: right; font-variant-numeric: tabular-nums; }
tr.top1 td { color: var(--yellow); font-weight: 700; }
tr.top2 td { color: #e5e7eb; font-weight: 700; }
tr.top3 td { color: #d6a36a; font-weight: 700; }
tr.sel td { background: #1f2840; }
.panel { background: var(--panel); border: 1px solid var(--line); border-radius: 14px; padding: 18px; margin-bottom: 16px; }

/* ----- 로그인 ----- */
.gate { max-width: 460px; margin: 12vh auto 0; padding: 0 16px; text-align: center; }
.gate h1 { font-size: 28px; margin-bottom: 18px; }
.gate .panel { text-align: left; }
.gate .row { margin: 6px 0 10px; }

/* ----- 전체 틀 ----- */
.shell { display: grid; grid-template-columns: 220px minmax(0, 1fr); min-height: 100vh; }
.side { background: #0f1420; border-right: 1px solid var(--line); padding: 18px 12px; display: flex; flex-direction: column; gap: 4px;
  position: sticky; top: 0; height: 100vh; }
.brand { font-size: 18px; font-weight: 700; padding: 4px 10px 16px; }
.side-label { font-size: 12px; color: var(--muted); padding: 8px 10px 4px; }
.nav-item { display: flex; align-items: center; gap: 10px; width: 100%; padding: 10px 12px; border-radius: 10px;
  background: transparent; color: var(--sub); font-size: 15px; text-align: left; }
.nav-item:hover { background: #1a2233; filter: none; }
.nav-item.active { background: #1f2a40; color: #fff; box-shadow: inset 3px 0 0 var(--green); }
.nav-icon { width: 22px; text-align: center; }
.side-foot { margin-top: auto; padding: 10px; border-top: 1px solid var(--line); display: flex; flex-direction: column; gap: 8px; }
.who { font-size: 13px; color: var(--sub); word-break: break-all; }
.main { padding: 18px 24px 40px; min-width: 0; }

/* ----- 게임 머리말 (이름, 학생 주소, 하위 탭) ----- */
.game-head { display: flex; flex-wrap: wrap; align-items: center; gap: 12px; padding-right: 200px; margin-bottom: 14px; min-height: 40px; }
.game-title { font-size: 24px; font-weight: 700; }
.url-chip { display: inline-flex; align-items: center; gap: 6px; background: var(--panel2); border: 1px solid var(--line);
  border-radius: 999px; padding: 4px 6px 4px 12px; font-size: 13px; color: var(--sub); }
.url-chip code { color: #fff; font-family: inherit; }
.url-chip button { padding: 4px 10px; font-size: 12px; border-radius: 999px; }
.subtabs { display: flex; gap: 4px; border-bottom: 1px solid var(--line); margin-bottom: 16px; }
.subtabs button { background: transparent; color: var(--sub); border-radius: 0; padding: 10px 14px; border-bottom: 2px solid transparent; }
.subtabs button.active { color: #fff; border-bottom-color: var(--green); }

/* ----- 목록 | 상세 ----- */
.split { display: grid; grid-template-columns: 290px minmax(0, 1fr); gap: 16px; align-items: start; }
.list-pane { background: var(--panel); border: 1px solid var(--line); border-radius: 14px; padding: 12px; position: sticky; top: 12px;
  max-height: calc(100vh - 24px); overflow-y: auto; }
.list-pane .new-btn { width: 100%; margin-bottom: 10px; }
.cards { display: flex; flex-direction: column; gap: 6px; }
.card { display: block; width: 100%; text-align: left; background: var(--panel2); border: 1px solid transparent; border-radius: 10px;
  padding: 10px 12px; color: var(--text); font-weight: normal; }
.card.sel { border-color: var(--green); background: #14241c; }
.card-top { display: flex; align-items: center; gap: 8px; }
.card-code { font-weight: 700; color: #fde047; letter-spacing: 1px; font-variant-numeric: tabular-nums; }
.card-title { font-weight: 700; flex: 1; min-width: 0; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.card-sub { font-size: 12px; color: var(--muted); margin-top: 3px; }
.badge { display: inline-block; font-size: 12px; font-weight: 700; padding: 2px 8px; border-radius: 999px; white-space: nowrap; }
.badge.live { background: rgba(34, 197, 94, .18); color: #4ade80; }
.badge.wait { background: rgba(251, 191, 36, .16); color: var(--yellow); }
.badge.reg { background: rgba(96, 165, 250, .16); color: var(--blue); }
.badge.done { background: rgba(148, 163, 184, .16); color: #cbd5e1; }
.empty-state { border: 1px dashed var(--line); border-radius: 14px; padding: 48px 20px; text-align: center; color: var(--muted); }

/* ----- 상세 ----- */
.form { display: grid; grid-template-columns: repeat(auto-fit, minmax(170px, 1fr)); gap: 12px; align-items: end; margin-bottom: 8px; }
.form label { display: flex; flex-direction: column; gap: 6px; font-size: 13px; color: var(--sub); }
.form input { width: 100%; }
.detail-head { display: flex; flex-wrap: wrap; gap: 18px; align-items: center; margin-bottom: 14px; }
.code-box { text-align: center; }
.big-code { font-size: 42px; font-weight: 700; letter-spacing: 6px; color: #fde047; line-height: 1.05; }
.detail-title { font-size: 21px; font-weight: 700; }
.timer { font-size: 30px; font-weight: 700; font-variant-numeric: tabular-nums; margin-left: auto; }
.steps { display: flex; list-style: none; padding: 0; margin: 0 0 14px; gap: 6px; flex-wrap: wrap; }
.steps li { flex: 1; min-width: 90px; padding: 8px 10px; border-radius: 9px; background: var(--panel2); color: var(--muted);
  font-size: 13px; font-weight: 700; border: 1px solid transparent; }
.steps li.done { color: #4ade80; }
.steps li.done::before { content: '✓ '; }
.steps li.now { color: #fff; border-color: var(--green); background: #14241c; }
.next { background: var(--panel2); border: 1px solid var(--line); border-left: 4px solid var(--green); border-radius: 10px;
  padding: 14px 16px; margin-bottom: 12px; }
.next-label { font-size: 12px; color: var(--green); font-weight: 700; margin-bottom: 4px; }
.next-text { margin-bottom: 10px; line-height: 1.5; }
.tools { margin-bottom: 16px; }
.section { margin-top: 18px; }
.cols { display: grid; grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr); gap: 18px; }
details.box { background: var(--panel2); border-radius: 10px; padding: 10px 14px; margin-top: 16px; }
details.box summary { cursor: pointer; font-weight: 700; }
#status { font-size: 18px; font-weight: 700; }
#oGamesBody td { white-space: nowrap; }
/* 테트리스 실시간 보드 */
.t-thumbs { display: flex; flex-wrap: wrap; gap: 10px; }
.t-thumbs .thumb { display: flex; flex-direction: column; align-items: center; gap: 3px; }
.t-thumbs .tb { position: relative; border: 2px solid var(--line); border-radius: 4px; line-height: 0; }
.t-thumbs canvas { display: block; }
.t-thumbs .tname { font-size: 12px; max-width: 150px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; color: var(--sub); }
.t-thumbs .tstat { position: absolute; left: 0; right: 0; top: 40%; text-align: center; font-size: 14px; line-height: 1.3; }
.t-thumbs .dead .tb { border-color: #4b1d1d; }
.t-thumbs .dead canvas { opacity: .4; }
.t-thumbs .dead .tstat { color: #f87171; }
.t-thumbs .win .tb { border-color: var(--yellow); }
.t-thumbs .win .tstat { color: var(--yellow); }
.t-thumbs .idle canvas { opacity: .5; }
.t-thumbs .idle .tstat { color: var(--sub); }

/* ----- 좁은 화면 ----- */
@media (max-width: 1200px) {
  .split { grid-template-columns: minmax(0, 1fr); }
  .list-pane { position: static; max-height: 320px; }
  .cols { grid-template-columns: minmax(0, 1fr); }
}
@media (max-width: 760px) {
  .shell { grid-template-columns: minmax(0, 1fr); }
  .side { position: static; height: auto; flex-direction: row; flex-wrap: wrap; align-items: center; padding: 52px 10px 8px; gap: 4px; }
  .brand { padding: 0 8px; width: 100%; }
  .side-label { display: none; }
  .nav-item { width: auto; }
  .nav-item.active { box-shadow: inset 0 -3px 0 var(--green); }
  .side-foot { margin: 0 0 0 auto; border: 0; padding: 0; flex-direction: row; align-items: center; }
  .main { padding: 14px 12px 32px; }
  .game-head { padding-right: 0; }
  .big-code { font-size: 34px; }
}