:root {
  --accent: #4f46e5;
  --accent-dark: #3730a3;
  --accent-light: #eef2ff;
  --bg: #fafafa;
  --card: #ffffff;
  --text: #18181b;
  --muted: #71717a;
  --border: #e4e4e7;
  --green: #16a34a;
  --red: #dc2626;
  --radius: 12px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Noto Sans',
    'Noto Sans Thai', 'Helvetica Neue', Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

.topbar {
  background: #fff;
  border-bottom: 1px solid var(--border);
  color: var(--text);
  padding: 16px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}
.topbar .brand { font-weight: 700; font-size: 1.05rem; letter-spacing: -0.01em; text-decoration: none; color: var(--text); }
.topbar .brand small { font-weight: 400; color: var(--muted); margin-left: 10px; font-size: 0.8rem; }
.topbar-right { display: flex; align-items: center; gap: 12px; }

.lang-switch { display: flex; gap: 2px; background: var(--bg); border: 1px solid var(--border); border-radius: 8px; padding: 2px; }
.lang-btn {
  background: transparent; color: var(--muted); border: none;
  padding: 4px 10px; border-radius: 6px; cursor: pointer; font-size: 0.78rem; font-weight: 600;
}
.lang-btn.active { background: #fff; color: var(--text); box-shadow: 0 1px 2px rgba(0,0,0,0.06); }

.container { max-width: 760px; margin: 0 auto; padding: 40px 20px 80px; }
.container.wide { max-width: 1080px; }

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  margin-bottom: 20px;
}
.card h1 { margin: 0 0 8px; font-size: 1.35rem; letter-spacing: -0.02em; line-height: 1.35; }
.card h2 { margin: 0 0 14px; font-size: 1.02rem; letter-spacing: -0.01em; }
.card-accent { border-top: 3px solid var(--accent); }

.q-title { font-weight: 600; margin-bottom: 6px; line-height: 1.45; }
.q-title .req { color: var(--red); margin-left: 4px; }
.q-desc { font-size: 0.87rem; color: var(--muted); white-space: pre-wrap; margin-bottom: 16px; line-height: 1.55; }

input[type="text"], input[type="password"], input[type="date"], input[type="time"],
textarea, select {
  width: 100%; padding: 11px 14px; border: 1px solid var(--border);
  border-radius: 9px; font: inherit; background: #fff; color: var(--text);
}
input:focus, textarea:focus, select:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-light); }
textarea { min-height: 96px; resize: vertical; }
::placeholder { color: #a1a1aa; }

.opt { display: flex; align-items: flex-start; gap: 12px; padding: 8px 6px; cursor: pointer; border-radius: 8px; }
.opt:hover { background: var(--bg); }
.opt input { margin-top: 5px; accent-color: var(--accent); width: 17px; height: 17px; flex: none; }

.btn {
  display: inline-block; background: var(--text); color: #fff; border: none;
  padding: 11px 22px; border-radius: 9px; font: inherit; font-weight: 600; font-size: 0.92rem;
  cursor: pointer; text-decoration: none; transition: background 0.15s;
}
.btn:hover { background: #000; }
.btn.secondary { background: #fff; color: var(--text); border: 1px solid var(--border); }
.btn.secondary:hover { background: var(--bg); }
.btn.danger { background: #fff; color: var(--red); border: 1px solid #fecaca; }
.btn.danger:hover { background: #fef2f2; }
.btn.small { padding: 7px 14px; font-size: 0.82rem; border-radius: 8px; }
.btn:disabled { opacity: 0.5; cursor: default; }

.error-msg { color: var(--red); font-weight: 600; margin: 12px 0; font-size: 0.9rem; }
.success-msg { color: var(--green); font-weight: 600; }
.muted { color: var(--muted); font-size: 0.87rem; }

.q-error { border-color: var(--red); }

/* admin */
.tabs { display: flex; gap: 4px; margin-bottom: 24px; flex-wrap: wrap; border-bottom: 1px solid var(--border); }
.tab {
  padding: 9px 16px; background: transparent; border: none; border-bottom: 2px solid transparent;
  cursor: pointer; font: inherit; font-weight: 600; font-size: 0.9rem; color: var(--muted);
  margin-bottom: -1px;
}
.tab:hover { color: var(--text); }
.tab.active { color: var(--text); border-bottom-color: var(--text); }

.form-row { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 16px 0; border-bottom: 1px solid var(--border); }
.form-row:last-child { border-bottom: none; }

table.data { width: 100%; border-collapse: collapse; font-size: 0.88rem; }
table.data th { text-align: left; color: var(--muted); font-weight: 600; font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.04em; padding: 10px 12px; border-bottom: 1px solid var(--border); white-space: nowrap; }
table.data td { padding: 11px 12px; border-bottom: 1px solid var(--border); vertical-align: top; }
table.data tr:last-child td { border-bottom: none; }
table.data tr:hover td { background: var(--bg); }
.table-scroll { overflow-x: auto; }

.badge { display: inline-block; padding: 2px 10px; border-radius: 999px; font-size: 0.72rem; font-weight: 600; }
.badge.open { background: #f0fdf4; color: var(--green); border: 1px solid #bbf7d0; }
.badge.closed { background: #fef2f2; color: var(--red); border: 1px solid #fecaca; }
.badge.score { background: var(--accent-light); color: var(--accent-dark); }

/* statistik */
.stat-cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(170px, 1fr)); gap: 16px; margin-bottom: 20px; }
.stat-card { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 22px; text-align: center; }
.stat-card .num { font-size: 2.1rem; font-weight: 700; letter-spacing: -0.03em; color: var(--text); }
.stat-card .lbl { font-size: 0.78rem; color: var(--muted); font-weight: 600; margin-top: 4px; }

.chart-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(330px, 1fr)); gap: 16px; }
.chart-card { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 22px; }
.chart-card h3 { margin: 0 0 4px; font-size: 0.9rem; line-height: 1.45; }
.chart-card .sub { font-size: 0.78rem; color: var(--muted); margin-bottom: 14px; }
.donut-wrap { display: flex; align-items: center; gap: 18px; flex-wrap: wrap; }
.legend { font-size: 0.8rem; flex: 1; min-width: 120px; }
.legend div { display: flex; align-items: center; gap: 8px; margin: 4px 0; }
.legend .dot { width: 10px; height: 10px; border-radius: 3px; flex: none; }

.hbar-row { display: flex; align-items: center; gap: 10px; margin: 6px 0; font-size: 0.82rem; }
.hbar-label { width: 34px; text-align: right; font-weight: 600; flex: none; }
.hbar-track { flex: 1; background: var(--bg); border: 1px solid var(--border); border-radius: 6px; height: 18px; overflow: hidden; }
.hbar-fill { height: 100%; background: var(--accent); border-radius: 5px; min-width: 2px; }
.hbar-val { width: 80px; color: var(--muted); flex: none; }

.progress { background: var(--bg); border: 1px solid var(--border); border-radius: 6px; height: 8px; overflow: hidden; min-width: 80px; }
.progress > div { height: 100%; background: var(--accent); border-radius: 6px; }

.copy-row { display: flex; gap: 8px; align-items: center; margin: 6px 0 16px; }
.copy-row input { flex: 1; font-size: 0.82rem; background: var(--bg); }

.center-page { min-height: 70vh; display: flex; align-items: center; justify-content: center; }
.login-card { width: 100%; max-width: 380px; }
label.field-label { display: block; font-weight: 600; font-size: 0.85rem; margin: 16px 0 6px; }

.toast {
  position: fixed; bottom: 28px; left: 50%; transform: translateX(-50%);
  background: var(--text); color: #fff; padding: 10px 24px; border-radius: 9px;
  font-weight: 600; font-size: 0.88rem; opacity: 0; transition: opacity 0.25s; pointer-events: none; z-index: 99;
}
.toast.show { opacity: 1; }

@media (max-width: 600px) {
  .container { padding: 20px 12px 60px; }
  .card { padding: 20px; }
}