:root {
  --primary: #1a56db;
  --primary-dark: #1040b0;
  --success: #057a55;
  --warning: #c27803;
  --danger: #c81e1e;
  --bg: #f3f4f6;
  --card: #fff;
  --border: #e5e7eb;
  --text: #111827;
  --muted: #6b7280;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
body { font-family: 'Sarabun', sans-serif; background: var(--bg); color: var(--text); font-size: 15px; }
a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }

/* NAV */
.navbar { background: var(--primary); padding: 0 1.5rem; display: flex; align-items: center; height: 56px; gap: 1.5rem; }
.navbar .brand { color: #fff; font-size: 1.15rem; font-weight: 700; }
.navbar .nav-links { display: flex; gap: 1rem; margin-left: auto; }
.navbar .nav-links a { color: rgba(255,255,255,.85); font-size: .9rem; }
.navbar .nav-links a:hover { color: #fff; text-decoration: none; }

/* HERO */
.hero { background: linear-gradient(135deg, #1a56db 0%, #0e3dad 100%); color: #fff; padding: 3rem 1.5rem; text-align: center; }
.hero h1 { font-size: 2rem; font-weight: 800; margin-bottom: .5rem; }
.hero p { opacity: .85; font-size: 1.05rem; }

/* LAYOUT */
.container { max-width: 860px; margin: 0 auto; padding: 2rem 1rem; }
.container-wide { max-width: 1100px; margin: 0 auto; padding: 2rem 1rem; }

/* CARD */
.card { background: var(--card); border: 1px solid var(--border); border-radius: 10px; padding: 1.75rem; margin-bottom: 1.5rem; }
.card-title { font-size: 1.1rem; font-weight: 700; margin-bottom: 1.25rem; padding-bottom: .75rem; border-bottom: 1px solid var(--border); }

/* FORM */
.form-group { margin-bottom: 1.1rem; }
.form-group label { display: block; font-weight: 600; margin-bottom: .35rem; font-size: .9rem; }
.form-group label span.req { color: #e02020; }
.form-control {
  width: 100%; padding: .55rem .85rem; border: 1px solid #d1d5db;
  border-radius: 6px; font-size: .95rem; font-family: inherit; background: #fff;
  transition: border-color .2s;
}
.form-control:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px rgba(26,86,219,.12); }
textarea.form-control { resize: vertical; min-height: 90px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
@media(max-width:600px) { .form-row { grid-template-columns: 1fr; } }

/* BUTTONS */
.btn { display: inline-block; padding: .55rem 1.4rem; border-radius: 6px; border: none; font-size: .95rem; font-family: inherit; cursor: pointer; font-weight: 600; transition: opacity .15s; }
.btn:hover { opacity: .88; }
.btn-primary { background: var(--primary); color: #fff; }
.btn-success { background: #057a55; color: #fff; }
.btn-danger  { background: #c81e1e; color: #fff; }
.btn-secondary { background: #e5e7eb; color: var(--text); }
.btn-sm { padding: .3rem .85rem; font-size: .82rem; }

/* BADGE */
.badge { display: inline-block; padding: .2rem .65rem; border-radius: 99px; font-size: .78rem; font-weight: 700; }
.bg-success { background: #d1fae5; color: #065f46; }
.bg-danger  { background: #fee2e2; color: #991b1b; }
.bg-warning { background: #fef3c7; color: #92400e; }
.text-dark { color: #111; }

/* ALERT */
.alert { padding: .8rem 1.1rem; border-radius: 7px; margin-bottom: 1rem; font-size: .9rem; }
.alert-success { background: #d1fae5; color: #065f46; border: 1px solid #6ee7b7; }
.alert-danger  { background: #fee2e2; color: #991b1b; border: 1px solid #fca5a5; }
.alert-info    { background: #dbeafe; color: #1e40af; border: 1px solid #93c5fd; }

/* TABLE */
.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: .9rem; }
thead th { background: #f9fafb; text-align: left; padding: .65rem .9rem; border-bottom: 2px solid var(--border); font-weight: 700; white-space: nowrap; }
tbody td { padding: .6rem .9rem; border-bottom: 1px solid var(--border); vertical-align: middle; }
tbody tr:hover { background: #f9fafb; }

/* REF BOX */
.ref-box { background: #eff6ff; border: 2px dashed var(--primary); border-radius: 10px; padding: 1.5rem; text-align: center; margin: 1rem 0; }
.ref-box .ref-num { font-size: 2rem; font-weight: 900; color: var(--primary); letter-spacing: 2px; }
.ref-box p { color: var(--muted); margin-top: .4rem; font-size: .9rem; }

/* STATUS PAGE */
.status-card { max-width: 600px; margin: 2rem auto; }

/* ADMIN SIDEBAR */
.admin-layout { display: flex; min-height: calc(100vh - 56px); }
.sidebar { width: 220px; background: #1e2530; flex-shrink: 0; padding: 1rem 0; }
.sidebar a { display: block; padding: .65rem 1.4rem; color: rgba(255,255,255,.75); font-size: .9rem; }
.sidebar a:hover, .sidebar a.active { background: rgba(255,255,255,.08); color: #fff; text-decoration: none; }
.sidebar .s-label { padding: .5rem 1.4rem; color: rgba(255,255,255,.35); font-size: .72rem; text-transform: uppercase; letter-spacing: 1px; margin-top: .5rem; }
.main-content { flex: 1; padding: 1.75rem; overflow-x: auto; }
@media(max-width:720px) { .sidebar { display: none; } }

/* STAT CARDS */
.stat-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 1rem; margin-bottom: 1.5rem; }
.stat-card { background: var(--card); border: 1px solid var(--border); border-radius: 10px; padding: 1.25rem; text-align: center; }
.stat-card .num { font-size: 2rem; font-weight: 900; }
.stat-card .lbl { font-size: .8rem; color: var(--muted); margin-top: .2rem; }
.stat-card.c-blue  .num { color: var(--primary); }
.stat-card.c-green .num { color: var(--success); }
.stat-card.c-red   .num { color: var(--danger); }
.stat-card.c-yellow .num { color: var(--warning); }

/* MEMBER INPUT */
.member-row { display: flex; gap: .5rem; margin-bottom: .5rem; }
.member-row input { flex: 1; }