:root {
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --success: #16a34a;
  --warning: #d97706;
  --error: #dc2626;
  --bg: #f8fafc;
  --surface: #ffffff;
  --border: #e2e8f0;
  --text: #1e293b;
  --muted: #64748b;
  --radius: 8px;
  --shadow: 0 1px 3px rgba(0,0,0,.1);
}

*, *::before, *::after { box-sizing: border-box; }

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

/* ── Navbar ── */
.navbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: .75rem 1.5rem;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  box-shadow: var(--shadow);
}
.brand { font-weight: 700; font-size: 1.1rem; text-decoration: none; color: var(--primary); }
.nav-links a, .nav-links .btn-link {
  margin-left: 1rem;
  text-decoration: none;
  color: var(--muted);
  font-size: .875rem;
}
.nav-links a:hover { color: var(--text); }
.btn-link { background: none; border: none; cursor: pointer; padding: 0; font: inherit; }

/* ── Container ── */
.container { max-width: 1100px; margin: 0 auto; padding: 1.5rem; }

/* ── Auth page ── */
.auth-page { display: flex; align-items: center; justify-content: center; min-height: 100vh; }
.auth-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2rem;
  width: 100%;
  max-width: 380px;
  box-shadow: var(--shadow);
}
.auth-card h1 { margin: 0 0 .25rem; font-size: 1.5rem; color: var(--primary); }
.subtitle { margin: 0 0 1.5rem; color: var(--muted); font-size: .875rem; }

/* ── Forms ── */
label { display: block; margin-bottom: .75rem; font-weight: 500; }
input, select, textarea {
  display: block;
  width: 100%;
  margin-top: .25rem;
  padding: .5rem .75rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: .875rem;
  color: var(--text);
  background: var(--surface);
}
input:focus, select:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 2px rgba(37,99,235,.15); }
.checkbox-label { display: flex; align-items: center; gap: .5rem; font-weight: 400; }
.checkbox-label input { width: auto; display: inline; }
.form-actions { display: flex; gap: .5rem; justify-content: flex-end; margin-top: 1rem; }

/* ── Buttons ── */
.btn {
  display: inline-block;
  padding: .45rem .9rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: .875rem;
  cursor: pointer;
  text-decoration: none;
  color: var(--text);
  background: var(--surface);
  transition: background .15s;
}
.btn:hover { background: var(--bg); }
.btn-primary { background: var(--primary); color: #fff; border-color: var(--primary); }
.btn-primary:hover { background: var(--primary-dark); border-color: var(--primary-dark); }
.btn-warning { background: var(--warning); color: #fff; border-color: var(--warning); }
.btn-danger  { background: var(--error);   color: #fff; border-color: var(--error); }
.btn-full    { width: 100%; text-align: center; }
.btn-sm      { padding: .25rem .6rem; font-size: .8rem; }
.btn-group   { display: flex; gap: .5rem; }

/* ── Alerts ── */
.alert { padding: .75rem 1rem; border-radius: var(--radius); margin-bottom: 1rem; font-size: .875rem; }
.alert-success { background: #dcfce7; color: var(--success); border: 1px solid #86efac; }
.alert-error   { background: #fee2e2; color: var(--error);   border: 1px solid #fca5a5; }

/* ── Badges ── */
.badge {
  display: inline-block;
  padding: .15rem .5rem;
  border-radius: 999px;
  font-size: .75rem;
  font-weight: 600;
  background: var(--border);
  color: var(--muted);
}
.badge-success { background: #dcfce7; color: var(--success); }
.badge-warning { background: #fef3c7; color: var(--warning); }
.badge-error   { background: #fee2e2; color: var(--error); }

/* ── Table ── */
.table { width: 100%; border-collapse: collapse; margin-top: .75rem; }
.table th, .table td { padding: .6rem .75rem; text-align: left; border-bottom: 1px solid var(--border); }
.table th { font-weight: 600; font-size: .8rem; text-transform: uppercase; color: var(--muted); }
.table tbody tr:hover { background: var(--bg); }

/* ── Stats ── */
.stats-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(140px,1fr)); gap: 1rem; margin-bottom: 1.5rem; }
.stat-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem;
  text-align: center;
  box-shadow: var(--shadow);
}
.stat-value { display: block; font-size: 2rem; font-weight: 700; color: var(--primary); }
.stat-label { font-size: .8rem; color: var(--muted); }

/* ── Detail grid ── */
.detail-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; margin-bottom: 1.5rem; }
.detail-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem;
  box-shadow: var(--shadow);
}
.detail-card h3 { margin: 0 0 .75rem; font-size: .95rem; }
dl { display: grid; grid-template-columns: auto 1fr; gap: .35rem .75rem; margin: 0; }
dt { font-weight: 600; color: var(--muted); }
dd { margin: 0; }

/* ── Misc ── */
.page-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 1rem; }
.page-header h2 { margin: 0; }
.api-key { display: block; font-size: .75rem; word-break: break-all; color: var(--muted); }
.balance { font-size: 1.5rem; font-weight: 700; color: var(--success); margin: 0 0 .75rem; }
.muted { color: var(--muted); }

/* ── QR box ── */
#qr-box { margin-bottom: .75rem; }
#qr-box img { border: 4px solid var(--border); border-radius: var(--radius); }
#qr-status { font-size: .875rem; color: var(--muted); margin-top: .5rem; }

/* ── Chatbot flows ── */
.flow-card { border: 1px solid var(--border); border-radius: var(--radius); padding: .75rem; margin-bottom: .75rem; }
.flow-header { display: flex; align-items: center; gap: .5rem; margin-bottom: .5rem; }
.step-form { display: flex; gap: .4rem; flex-wrap: wrap; }
.step-form input[type=text] { flex: 1; min-width: 120px; }