:root{
  --bg: #F4F6F3;
  --ink: #1C2B24;
  --ink-soft: #4B5A52;
  --board: #2F5D50;
  --board-dark: #234A40;
  --gold: #C9963C;
  --aisle: #E4E8E2;
  --line: #D6DCD4;
  --disabled: #C7CDC4;
  --card: #FFFFFF;
  --danger: #B4443A;
}
*{box-sizing:border-box;}
body{
  margin:0;
  background:var(--bg);
  color:var(--ink);
  font-family:'IBM Plex Sans', sans-serif;
  -webkit-font-smoothing:antialiased;
}
a{ color:var(--board); text-decoration:none; }
a:hover{ text-decoration:underline; }

.topnav{ background:var(--ink); }
.topnav-inner{
  max-width:1180px; margin:0 auto; padding:12px 20px;
  display:flex; align-items:center; justify-content:space-between; flex-wrap:wrap; gap:10px;
}
.brand{ color:#fff; font-family:'Fraunces', serif; font-weight:600; font-size:16px; }
.brand span{ color:var(--gold); font-family:'IBM Plex Mono', monospace; font-size:11px; margin-left:6px; }
.topnav-links{ display:flex; align-items:center; gap:16px; }
.topnav-links a{ color:#EAF2EE; font-size:13px; }
.topnav-links a:hover{ color:var(--gold); }
.user-tag{ color:var(--gold); font-size:12.5px; font-family:'IBM Plex Mono', monospace; }

.wrap{ max-width:1180px; margin:0 auto; padding:28px 20px 60px; }

h1{ font-family:'Fraunces', serif; font-weight:600; font-size:26px; margin:0 0 6px; letter-spacing:-0.01em; }
h2{ font-family:'Fraunces', serif; font-weight:600; font-size:16px; margin:0 0 12px; }
.subtitle{ font-size:13px; color:var(--ink-soft); font-family:'IBM Plex Mono', monospace; margin-bottom:20px; }

.panel{ background:var(--card); border:1px solid var(--line); border-radius:10px; padding:18px; margin-bottom:20px; }

.board{
  background: linear-gradient(180deg, var(--board), var(--board-dark));
  color:#EAF2EE; text-align:center; font-family:'Fraunces', serif; font-size:13px;
  letter-spacing:0.12em; text-transform:uppercase; padding:10px; border-radius:6px; margin-bottom:22px;
}

.grid{
  display:grid;
  grid-template-columns: repeat(2,1fr) 0.55fr repeat(3,1fr) 0.55fr repeat(2,1fr);
  gap:10px;
}
.aisle-col::before{ content:''; display:block; height:100%; border-left:2px dashed var(--line); margin:0 auto; }
.seat{
  position:relative; background:#FBFBFA; border:1.5px solid var(--line); border-radius:8px;
  padding:10px 8px 8px; min-height:64px; display:flex; flex-direction:column; justify-content:space-between;
}
.seat.empty{
  background:repeating-linear-gradient(45deg, #EDEFEC, #EDEFEC 6px, #E4E7E2 6px, #E4E7E2 12px);
  border-style:dashed; color:var(--disabled);
}
.seat .num{ font-family:'IBM Plex Mono', monospace; font-size:10px; color:var(--ink-soft); }
.seat .name{ font-size:12.5px; font-weight:500; line-height:1.25; word-break:break-word; }
.seat select{ width:100%; font-size:11.5px; margin-top:4px; padding:3px; border-radius:4px; border:1px solid var(--line); }

.legend{ margin-top:18px; display:flex; gap:18px; flex-wrap:wrap; font-size:11.5px; color:var(--ink-soft); }
.legend span{ display:flex; align-items:center; gap:6px; }
.swatch{ width:12px;height:12px;border-radius:3px;display:inline-block;border:1.5px solid var(--line); }

label{ font-size:12.5px; font-weight:500; display:block; margin-bottom:5px; }
input[type=text], input[type=password], input[type=file], select.form-select{
  width:100%; font-family:'IBM Plex Sans', sans-serif; font-size:13px; padding:8px;
  border:1px solid var(--line); border-radius:6px; background:#FBFBFA; margin-bottom:14px;
}
button, .btn{
  font-family:'IBM Plex Sans', sans-serif; font-size:12.5px; font-weight:500; border:none;
  border-radius:6px; padding:9px 14px; cursor:pointer; display:inline-block;
}
.btn-primary{ background:var(--board); color:#fff; }
.btn-ghost{ background:var(--aisle); color:var(--ink); }
.btn-danger{ background:#fff; color:var(--danger); border:1px solid var(--danger); }
button:hover, .btn:hover{ opacity:0.85; }

table{ width:100%; border-collapse:collapse; font-size:13px; }
th, td{ text-align:left; padding:8px 6px; border-bottom:1px solid var(--line); }
th{ font-family:'IBM Plex Mono', monospace; font-size:11px; text-transform:uppercase; color:var(--ink-soft); }

.alert{ padding:10px 14px; border-radius:6px; font-size:13px; margin-bottom:16px; }
.alert-ok{ background:#E6F0EA; color:var(--board-dark); border:1px solid #BFDACB; }
.alert-error{ background:#FBEAE8; color:var(--danger); border:1px solid #EFC4BE; }

.history{ max-height:340px; overflow-y:auto; display:flex; flex-direction:column; gap:8px; }
.history-item{ font-size:11.5px; border-left:2px solid var(--gold); padding:4px 0 4px 10px; color:var(--ink-soft); }
.history-item .ts{ font-family:'IBM Plex Mono', monospace; font-size:9.5px; color:var(--disabled); display:block; }
.history-empty{ font-size:12px; color:var(--disabled); font-style:italic; }

.tabs{ display:flex; gap:6px; margin-bottom:18px; }
.tabs a{ padding:8px 14px; border-radius:6px 6px 0 0; font-size:13px; background:var(--aisle); color:var(--ink); }
.tabs a.active{ background:var(--card); border:1px solid var(--line); border-bottom:1px solid var(--card); font-weight:600; }