:root {
  --navy: #1B2A4A; --navy-2: #2E4269; --accent: #4C9AD4; --cream: #F7F5F1;
  --ink: #2A2A2A; --muted: #6B7280; --line: #E4E0D8; --danger: #B4432F; --ok: #3F7A5B; --warn: #B7791F;
  --line-green: #06C755; --gold: #C19A5B;
}
* { box-sizing: border-box; }
body { margin: 0; font-family: 'Sarabun', sans-serif; background: var(--cream); color: var(--ink); min-height: 100vh; }
h1, h2, h3, .brand { font-family: 'Kanit', sans-serif; }
button { font-family: 'Kanit', sans-serif; font-weight: 500; font-size: 15px; cursor: pointer; border: none; border-radius: 6px; }
input, select, textarea { width: 100%; padding: 10px 12px; border: 1px solid var(--line); border-radius: 6px; font: inherit; font-size: 15px; background: #fff; }
input:focus, select:focus, textarea:focus { outline: 2px solid var(--accent); outline-offset: 1px; }
label { display: block; font-size: 13px; font-weight: 600; color: var(--navy); margin: 12px 0 4px; }
.row2 { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }

.topbar { background: #fff; color: var(--navy); border-bottom: 3px solid var(--gold); padding: 6px 16px; display: flex; justify-content: space-between; align-items: center; gap: 8px; }
.topbar .brand { font-size: 17px; font-weight: 600; color: var(--navy); display: flex; align-items: center; gap: 10px; }
.logo-top { height: 46px; width: auto; display: block; }
.logo-login { height: 120px; width: auto; display: block; margin: 0 auto 6px; }
.topbar .who { font-size: 13px; color: var(--muted); }
.link-btn { background: transparent; color: var(--navy-2); text-decoration: underline; font-size: 13px; padding: 4px; }

main { max-width: 720px; margin: 0 auto; padding: 16px 16px 80px; }
.card { background: #fff; border: 1px solid var(--line); border-radius: 8px; padding: 18px; margin-bottom: 14px; }
.card h3 { margin: 0 0 10px; color: var(--navy); }
.muted { color: var(--muted); font-size: 14px; }
.center { text-align: center; }
.msg-error { color: var(--danger); font-size: 14px; margin: 8px 0 0; }
.msg-ok { color: var(--ok); font-size: 14px; margin: 8px 0 0; }

.btn { padding: 11px 18px; }
.btn-line { background: var(--line-green); color: #fff; width: 100%; padding: 14px; font-size: 17px; }
.btn-primary { background: var(--navy); color: #fff; }
.btn-primary:hover { background: var(--navy-2); }
.btn-ghost { background: #fff; color: var(--navy); border: 1px solid var(--line); }
.btn-danger { background: #fff; color: var(--danger); border: 1px solid var(--danger); }
.btn-row { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 12px; }

.login-wrap { min-height: 100vh; display: flex; align-items: center; justify-content: center; padding: 20px; }
.login-card { background: #fff; border: 1px solid var(--line); border-radius: 8px; padding: 32px 24px; width: 100%; max-width: 380px; text-align: center; }
.login-card .brand { color: var(--navy); font-size: 22px; font-weight: 700; margin: 0 0 4px; }

.big-room { font-family: 'Kanit', sans-serif; font-size: 40px; font-weight: 700; color: var(--navy); margin: 0; }
.kv { display: flex; justify-content: space-between; padding: 9px 0; border-top: 1px solid var(--line); font-size: 15px; }
.kv:first-of-type { border-top: none; }
.code-input { font-family: 'Kanit', sans-serif; font-size: 26px; letter-spacing: 4px; text-align: center; text-transform: uppercase; }

/* admin */
.chips { display: flex; gap: 6px; overflow-x: auto; padding-bottom: 6px; margin-bottom: 10px; }
.chip { background: #fff; border: 1px solid var(--line); color: var(--navy); padding: 8px 14px; white-space: nowrap; }
.chip.active { background: var(--navy); color: #fff; border-color: var(--navy); }
.room-row { display: grid; grid-template-columns: 64px 1fr auto; gap: 8px; align-items: center; background: #fff; border: 1px solid var(--line); border-radius: 8px; padding: 10px 12px; margin-bottom: 8px; cursor: pointer; }
.room-row:hover { border-color: var(--accent); }
.room-no { font-family: 'Kanit', sans-serif; font-size: 18px; font-weight: 600; color: var(--navy); }
.room-sub { font-size: 13px; color: var(--muted); }
.pill { display: inline-block; font-size: 12px; padding: 3px 10px; border-radius: 999px; font-weight: 500; }
.pill-occupied { background: #DFEEE5; color: var(--ok); }
.pill-vacant { background: #E7EDF6; color: var(--navy-2); }
.pill-reserved { background: #FBF0D9; color: var(--warn); }
.pill-unknown, .pill-maintenance { background: #EEE; color: var(--muted); }
.flag { color: var(--warn); margin-left: 4px; }
.stats { display: flex; gap: 14px; font-size: 13px; color: var(--muted); margin-bottom: 10px; flex-wrap: wrap; }

dialog { border: none; border-radius: 10px; padding: 0; width: min(560px, 94vw); max-height: 92vh; }
dialog::backdrop { background: rgba(20, 30, 50, .5); }
.dlg-head { display: flex; justify-content: space-between; align-items: center; padding: 14px 18px; border-bottom: 1px solid var(--line); position: sticky; top: 0; background: #fff; }
.dlg-head h3 { margin: 0; color: var(--navy); }
.dlg-body { padding: 8px 18px 20px; }
.dlg-body h4 { margin: 18px 0 4px; color: var(--navy); font-family: 'Kanit', sans-serif; }
.code-box { background: #F1F6FB; border: 1px dashed var(--accent); border-radius: 8px; padding: 14px; text-align: center; margin-top: 10px; }
.code-box .code { font-family: 'Kanit', sans-serif; font-size: 32px; letter-spacing: 5px; font-weight: 700; color: var(--navy); }
.check { display: flex; align-items: center; gap: 8px; margin-top: 12px; font-size: 14px; }
.check input { width: auto; }

.or-line { text-align: center; color: var(--muted); font-size: 13px; margin: 16px 0 10px; }
.email-form input { display: block; width: 100%; box-sizing: border-box; margin-bottom: 8px; }