:root {
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --success: #16a34a;
  --warning: #d97706;
  --danger: #dc2626;
  --secondary: #6b7280;
  --bg: #f3f4f6;
  --card-bg: #ffffff;
  --border: #e5e7eb;
  --text: #111827;
  --text-muted: #6b7280;
  --sidebar-width: 240px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: 'Segoe UI', Roboto, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
}

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

/* ---------- Auth pages (login/register) ---------- */
.auth-wrapper {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
}

.auth-card {
  background: var(--card-bg);
  border-radius: 12px;
  box-shadow: 0 10px 30px rgba(0,0,0,0.08);
  padding: 36px;
  width: 100%;
  max-width: 440px;
}

.auth-card h1 {
  font-size: 22px;
  margin-bottom: 4px;
}

.auth-card p.subtitle {
  color: var(--text-muted);
  margin-top: 0;
  margin-bottom: 24px;
  font-size: 14px;
}

/* ---------- Form elements ---------- */
.form-group { margin-bottom: 16px; }

label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 6px;
  color: #374151;
}

input[type=text], input[type=email], input[type=password],
input[type=date], input[type=number], input[type=file],
select, textarea {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 14px;
  background: #fff;
  color: var(--text);
}

input:focus, select:focus, textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(37,99,235,0.12);
}

.form-row { display: flex; gap: 16px; }
.form-row .form-group { flex: 1; }

.btn {
  display: inline-block;
  padding: 10px 18px;
  border-radius: 8px;
  border: none;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  text-align: center;
}

.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); }
.btn-success { background: var(--success); color: #fff; }
.btn-danger { background: var(--danger); color: #fff; }
.btn-secondary { background: var(--secondary); color: #fff; }
.btn-outline { background: transparent; border: 1px solid var(--border); color: var(--text); }
.btn-sm { padding: 6px 12px; font-size: 12px; }
.btn-block { width: 100%; }

/* ---------- App layout ---------- */
.app-wrapper { display: flex; min-height: 100vh; }

.sidebar {
  width: var(--sidebar-width);
  background: #111827;
  color: #e5e7eb;
  padding: 20px 0;
  flex-shrink: 0;
}

.sidebar .brand {
  padding: 0 20px 20px;
  font-size: 18px;
  font-weight: 700;
  color: #fff;
  border-bottom: 1px solid #1f2937;
  margin-bottom: 12px;
}

.sidebar nav a {
  display: block;
  padding: 11px 20px;
  color: #9ca3af;
  font-size: 14px;
  font-weight: 500;
}

.sidebar nav a:hover, .sidebar nav a.active {
  background: #1f2937;
  color: #fff;
  border-left: 3px solid var(--primary);
}

.main-content { flex: 1; padding: 28px 32px; max-width: 100%; }

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 24px;
}

.topbar h2 { margin: 0; font-size: 22px; }
.topbar .user-chip { font-size: 13px; color: var(--text-muted); }

/* ---------- Cards / tables ---------- */
.card {
  background: var(--card-bg);
  border-radius: 12px;
  border: 1px solid var(--border);
  padding: 22px;
  margin-bottom: 20px;
}

.card h3 { margin-top: 0; font-size: 16px; }

.stat-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 16px; margin-bottom: 24px; }
.stat-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 18px;
}
.stat-card .num { font-size: 28px; font-weight: 700; }
.stat-card .label { font-size: 13px; color: var(--text-muted); }

table { width: 100%; border-collapse: collapse; font-size: 14px; }
th, td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--border); }
th { color: var(--text-muted); font-weight: 600; font-size: 12px; text-transform: uppercase; }
tr:hover td { background: #fafafa; }

.badge {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 999px;
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
}
.badge-success { background: #dcfce7; color: #166534; }
.badge-warning { background: #fef3c7; color: #92400e; }
.badge-danger { background: #fee2e2; color: #991b1b; }
.badge-secondary { background: #e5e7eb; color: #374151; }

.alert {
  padding: 12px 16px;
  border-radius: 8px;
  font-size: 14px;
  margin-bottom: 18px;
}
.alert-success { background: #dcfce7; color: #166534; }
.alert-danger { background: #fee2e2; color: #991b1b; }
.alert-warning { background: #fef3c7; color: #92400e; }

.doc-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 14px; }
.doc-item { border: 1px solid var(--border); border-radius: 10px; padding: 14px; }
.doc-item .doc-name { font-weight: 600; font-size: 14px; margin-bottom: 6px; }
.doc-item .doc-actions { margin-top: 10px; display: flex; gap: 8px; }

.text-muted { color: var(--text-muted); }
.mt-0 { margin-top: 0; }
.mb-0 { margin-bottom: 0; }
.flex-between { display: flex; justify-content: space-between; align-items: center; }

canvas#signature-pad {
  border: 1px dashed var(--border);
  border-radius: 8px;
  background: #fff;
  touch-action: none;
  cursor: crosshair;
}

@media (max-width: 800px) {
  .app-wrapper { flex-direction: column; }
  .sidebar { width: 100%; }
  .form-row { flex-direction: column; }
}