:root {
  --primary: #7b2d26;      /* แดงเลือดหมู - โทนสีมหาวิทยาลัย */
  --primary-dark: #5e211c;
  --gold: #c9a24b;
  --bg: #f4f1ec;
  --card-bg: #ffffff;
  --text: #2b2622;
  --muted: #7a7369;
  --success: #2e7d32;
  --warning: #b8860b;
  --danger: #c0392b;
  --border: #e5ddce;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: 'Sarabun', 'Noto Sans Thai', 'Segoe UI', sans-serif;
  background: var(--bg);
  color: var(--text);
}

a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ---------- Layout ---------- */
.topbar {
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: #fff;
  padding: 14px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  box-shadow: 0 2px 6px rgba(0,0,0,.15);
}
.topbar .brand { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 1.15rem; }
.topbar .brand .emblem {
  width: 36px; height: 36px; border-radius: 50%; background: var(--gold);
  display: flex; align-items: center; justify-content: center; color: var(--primary-dark); font-weight: 800;
}
.topbar .user-box { display: flex; align-items: center; gap: 14px; font-size: .92rem; }
.topbar .user-box a { color: #f6e9c9; }
.badge-role {
  background: rgba(255,255,255,.18);
  padding: 3px 10px;
  border-radius: 20px;
  font-size: .78rem;
}

.layout { display: flex; min-height: calc(100vh - 62px); }

.sidebar {
  width: 230px;
  background: #fff;
  border-right: 1px solid var(--border);
  padding: 18px 0;
  flex-shrink: 0;
}
.sidebar a {
  display: block;
  padding: 11px 22px;
  color: var(--text);
  font-size: .95rem;
  border-left: 3px solid transparent;
}
.sidebar a:hover { background: #f7f1e6; text-decoration: none; }
.sidebar a.active { border-left-color: var(--primary); background: #f7ede9; color: var(--primary); font-weight: 600; }

.content { flex: 1; padding: 26px 30px; max-width: 1200px; }

.page-title {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--primary-dark);
  margin: 0 0 18px 0;
  border-bottom: 2px solid var(--gold);
  padding-bottom: 10px;
}

/* ---------- Card ---------- */
.card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 20px;
  margin-bottom: 20px;
  box-shadow: 0 1px 3px rgba(0,0,0,.04);
}
.card h3 { margin-top: 0; color: var(--primary-dark); font-size: 1.05rem; }

.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
@media (max-width: 800px) { .grid-3, .grid-2 { grid-template-columns: 1fr; } }

.stat-box {
  background: linear-gradient(135deg, #fff, #fbf7ee);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 16px 18px;
  text-align: center;
}
.stat-box .num { font-size: 1.8rem; font-weight: 800; color: var(--primary); }
.stat-box .label { font-size: .85rem; color: var(--muted); margin-top: 4px; }

.progress-bar-outer {
  background: #eee3cf;
  border-radius: 20px;
  height: 12px;
  overflow: hidden;
}
.progress-bar-inner {
  background: linear-gradient(90deg, var(--gold), var(--primary));
  height: 100%;
}

/* ---------- Table ---------- */
table.data-table { width: 100%; border-collapse: collapse; font-size: .92rem; }
table.data-table th, table.data-table td {
  padding: 10px 12px;
  border-bottom: 1px solid var(--border);
  text-align: left;
}
table.data-table th { background: #f7f1e6; color: var(--primary-dark); font-weight: 700; }
table.data-table tr:hover td { background: #fbf8f2; }

/* ---------- Form ---------- */
label { display: block; font-weight: 600; margin-bottom: 5px; font-size: .9rem; }
input[type=text], input[type=number], input[type=password], input[type=file], input[type=email], select, textarea {
  width: 100%;
  padding: 9px 11px;
  border: 1px solid var(--border);
  border-radius: 7px;
  font-size: .93rem;
  margin-bottom: 14px;
  font-family: inherit;
  background: #fff;
}
input:focus, select:focus, textarea:focus { outline: 2px solid var(--gold); border-color: var(--gold); }

.btn {
  display: inline-block;
  padding: 9px 18px;
  border-radius: 7px;
  border: none;
  background: var(--primary);
  color: #fff;
  cursor: pointer;
  font-size: .9rem;
  font-weight: 600;
  font-family: inherit;
}
.btn:hover { background: var(--primary-dark); }
.btn.secondary { background: #6b6258; }
.btn.secondary:hover { background: #524b43; }
.btn.small { padding: 5px 12px; font-size: .8rem; }
.btn.danger { background: var(--danger); }
.btn.gold { background: var(--gold); color: var(--primary-dark); }

/* ---------- Course chip / selection grid ---------- */
.course-item {
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 12px 14px;
  margin-bottom: 8px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: #fff;
}
.course-item.selected {
  opacity: .55;
  background: #f2ede3;
}
.course-item .info .code { font-weight: 700; color: var(--primary-dark); }
.course-item .info .name { font-size: .92rem; }
.course-item .info .meta { font-size: .78rem; color: var(--muted); }
.tag {
  display: inline-block;
  font-size: .72rem;
  padding: 2px 9px;
  border-radius: 20px;
  font-weight: 600;
}
.tag.done { background: #e2f0e2; color: var(--success); }
.tag.special { background: #fdf1d8; color: var(--warning); }
.tag.transfer { background: #e3e9f7; color: #34528a; }

.tabs { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 18px; }
.tabs a {
  padding: 7px 14px;
  border-radius: 20px;
  background: #fff;
  border: 1px solid var(--border);
  color: var(--text);
  font-size: .85rem;
}
.tabs a.active { background: var(--primary); color: #fff; border-color: var(--primary); }

.alert { padding: 12px 16px; border-radius: 8px; margin-bottom: 16px; font-size: .9rem; }
.alert.success { background: #e2f0e2; color: #1e5c22; }
.alert.error { background: #fbe3e0; color: var(--danger); }
.alert.info { background: #e3e9f7; color: #34528a; }

.login-wrap {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
}
.login-box {
  background: #fff;
  padding: 36px 34px;
  border-radius: 14px;
  width: 360px;
  box-shadow: 0 10px 30px rgba(0,0,0,.25);
}
.login-box .emblem-big {
  width: 60px; height: 60px; border-radius: 50%; background: var(--gold);
  display: flex; align-items: center; justify-content: center; color: var(--primary-dark);
  font-weight: 800; font-size: 1.4rem; margin: 0 auto 12px auto;
}
.login-box h2 { text-align: center; color: var(--primary-dark); margin-top: 0; }
.login-sub { text-align: center; color: var(--muted); font-size: .85rem; margin-bottom: 20px; }