:root {
  --bg: #f4f6f8;
  --panel: #ffffff;
  --border: #e2e5e9;
  --text: #1f2937;
  --muted: #6b7280;
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --danger: #dc2626;
  --success: #16a34a;
  --warn: #d97706;
  --radius: 8px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: "Segoe UI", "Noto Sans Thai", -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--bg);
  color: var(--text);
  font-size: 14px;
}

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

.app-shell { display: flex; min-height: 100vh; }

.sidebar {
  width: 220px;
  flex-shrink: 0;
  background: #111827;
  color: #d1d5db;
  padding: 20px 0;
}
.sidebar .brand { padding: 0 20px 20px; font-weight: 700; color: #fff; font-size: 16px; }
.sidebar nav a {
  display: block;
  padding: 10px 20px;
  color: #d1d5db;
}
.sidebar nav a:hover, .sidebar nav a.active {
  background: #1f2937;
  color: #fff;
  text-decoration: none;
}
.sidebar form { padding: 10px 20px; }
.sidebar button.link-btn { color: #d1d5db; }

.main { flex: 1; padding: 24px 32px; max-width: 1200px; }

h1 { font-size: 20px; margin: 0 0 16px; }
h2 { font-size: 16px; margin: 24px 0 12px; }

.status-msg {
  background: #ecfdf5;
  border: 1px solid #a7f3d0;
  color: #065f46;
  padding: 10px 14px;
  border-radius: var(--radius);
  margin-bottom: 16px;
}
.error-msg {
  background: #fef2f2;
  border: 1px solid #fecaca;
  color: #991b1b;
  padding: 10px 14px;
  border-radius: var(--radius);
  margin-bottom: 16px;
}
.error-msg ul { margin: 4px 0 0; padding-left: 18px; }

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

.stat-row { display: flex; gap: 16px; flex-wrap: wrap; margin-bottom: 20px; }
.stat-tile {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px 20px;
  min-width: 140px;
}
.stat-tile .num { font-size: 24px; font-weight: 700; }
.stat-tile .label { color: var(--muted); font-size: 12px; }

table { width: 100%; border-collapse: collapse; }
th, td {
  text-align: left;
  padding: 8px 10px;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
}
th { color: var(--muted); font-weight: 600; font-size: 12px; text-transform: uppercase; }

.toolbar { display: flex; justify-content: space-between; align-items: center; margin-bottom: 16px; gap: 12px; flex-wrap: wrap; }

.btn {
  display: inline-block;
  background: var(--primary);
  color: #fff;
  border: none;
  padding: 8px 14px;
  border-radius: var(--radius);
  cursor: pointer;
  font-size: 13px;
}
.btn:hover { background: var(--primary-dark); text-decoration: none; }
.btn.small { padding: 4px 10px; font-size: 12px; }
.btn.danger { background: var(--danger); }
.btn.secondary { background: #6b7280; }

.badge {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 999px;
  font-size: 11px;
  font-weight: 600;
}
.badge.pending { background: #fef3c7; color: #92400e; }
.badge.in_progress { background: #dbeafe; color: #1e40af; }
.badge.submitted { background: #ede9fe; color: #5b21b6; }
.badge.approved { background: #dcfce7; color: #166534; }

label { display: block; font-weight: 600; margin: 12px 0 4px; font-size: 13px; }
input[type=text], input[type=password], input[type=email], input[type=number],
input[type=datetime-local], input[type=file], select, textarea {
  width: 100%;
  padding: 8px 10px;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 14px;
  font-family: inherit;
}
textarea { min-height: 80px; }
.checkbox-row { display: flex; align-items: center; gap: 8px; margin-top: 12px; }
.checkbox-row input { width: auto; }
.checkbox-row label { margin: 0; }

.form-actions { margin-top: 20px; display: flex; gap: 10px; }

.inline-form { display: inline; }

.login-wrap {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg);
}
.login-card { width: 340px; }

.thumb { width: 90px; height: 90px; object-fit: cover; border-radius: 6px; border: 1px solid var(--border); }
.revision-tag { font-size: 11px; color: var(--muted); }
.step-block { border: 1px solid var(--border); border-radius: 6px; padding: 12px; margin-bottom: 10px; }
.step-block h4 { margin: 0 0 8px; font-size: 13px; }
.photo-row { display: flex; gap: 10px; flex-wrap: wrap; }
.photo-item { text-align: center; font-size: 11px; color: var(--muted); }

.muted { color: var(--muted); }
.filters { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
.filters select { width: auto; }