* { margin: 0; padding: 0; box-sizing: border-box; }

:root {
  --primary: #7c5aa8;
  --primary-dark: #6a4b90;
  --bg: #faf9fb;
  --card: #ffffff;
  --text: #1f2937;
  --text-muted: #6b7280;
  --border: #e5e7eb;
  --success: #10b981;
  --error: #ef4444;
  --warning: #f59e0b;
  --radius: 12px;
  --shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.1);
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem 1rem;
}

.container { width: 100%; max-width: 980px; margin: 0 auto; }

.header {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem 1.5rem;
  box-shadow: var(--shadow);
  margin: 0 0 1.25rem;
}

.header h1 { font-size: 1.35rem; letter-spacing: 0.2px; margin-bottom: 0.25rem; }
.header p { color: var(--text-muted); font-size: 0.95rem; }

.controls-panel {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 1rem;
  margin: 0 0 1.5rem;
}

.control-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem;
  box-shadow: var(--shadow);
}

.control-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1rem;
  gap: 0.75rem;
}

.control-header h4 { color: var(--text); font-size: 0.98rem; }
.control-help { color: var(--text-muted); font-size: 0.82rem; margin-top: 0.35rem; }

.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.9rem;
}

.field { grid-column: span 1; }
.field:first-child { grid-column: 1 / -1; }
.actions { grid-column: 1 / -1; display: flex; gap: 0.5rem; flex-wrap: wrap; }

label {
  display: block;
  font-weight: 700;
  font-size: 0.9rem;
  margin-bottom: 0.35rem;
}

input, select {
  width: 100%;
  padding: 0.7rem 0.75rem;
  border: 1px solid var(--border);
  border-radius: 10px;
  font-size: 0.95rem;
  font-family: inherit;
  background: white;
  color: var(--text);
}

input:focus, select:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(124, 90, 168, 0.15);
}

/* Buttons (same vibe) */
.btn-primary, .btn-secondary {
  padding: 0.75rem 1.1rem;
  border: none;
  border-radius: 10px;
  font-size: 0.875rem;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.2s ease;
  font-family: inherit;
}

.btn-primary { background: var(--primary); color: white; }
.btn-primary:hover { background: var(--primary-dark); transform: translateY(-1px); box-shadow: var(--shadow-lg); }

.btn-secondary {
  background: var(--card);
  color: var(--primary);
  border: 1px solid var(--primary);
}
.btn-secondary:hover { background: #faf5ff; }

.pill {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  background: #faf5ff;
  border: 1px solid rgba(124, 90, 168, 0.25);
  color: var(--primary-dark);
  border-radius: 999px;
  padding: 0.25rem 0.6rem;
  font-size: 0.78rem;
  font-weight: 800;
  white-space: nowrap;
}

.invoice-box {
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 0.9rem 1rem;
  background: #fbfbfd;
}

.row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 1rem;
  padding: 0.35rem 0;
  font-size: 0.95rem;
}

.row span { color: var(--text); }
.row strong { color: var(--text); }

.divider { height: 1px; background: var(--border); margin: 0.6rem 0; }

.row.total { font-size: 1.05rem; }
.row.total strong { color: var(--primary-dark); }

.mini-note { margin-top: 0.5rem; color: var(--text-muted); font-size: 0.82rem; }

.tips { margin-top: 1rem; display: grid; gap: 0.6rem; }
.tip { display: flex; gap: 0.6rem; align-items: flex-start; }
.badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 26px;
  height: 26px;
  border-radius: 999px;
  background: #f3f4f6;
  font-size: 0.8rem;
  font-weight: 900;
}

.branding-badge {
  margin: 1.5rem 0 0.75rem;
  text-align: center;
  color: var(--text);
  font-weight: 600;
}

.branding-badge a {
  color: var(--primary);
  font-weight: 800;
  text-decoration: none;
  transition: color 0.2s ease;
}

.branding-badge a:hover { color: var(--primary-dark); }

/* Responsive */
@media (max-width: 768px) {
  body { padding: 1rem 0.75rem; }
  .form-grid { grid-template-columns: 1fr; }
  .field { grid-column: 1 / -1; }
}