:root {
  --c-bg: #ffffff;
  --c-surface: #f9f6f1;
  --c-text: #1a1a1a;
  --c-muted: #666;
  --c-primary: #c25a2c;
  --c-primary-dark: #9c4520;
  --c-border: #e5e0d8;
  --c-error-bg: #fff2f0;
  --c-error-border: #e33;
  --radius: 8px;
  --font-sans: system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
  --font-heading: Georgia, 'Times New Roman', serif;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: var(--font-sans);
  color: var(--c-text);
  background: var(--c-bg);
  line-height: 1.6;
}

.app-header {
  background: var(--c-surface);
  border-bottom: 1px solid var(--c-border);
  padding: 2rem 1.5rem;
}

.app-header__inner {
  max-width: 800px;
  margin: 0 auto;
}

.app-header h1 {
  font-family: var(--font-heading);
  margin: 0 0 0.5rem;
  font-size: 1.8rem;
}

.app-header p {
  margin: 0;
  color: var(--c-muted);
}

.app-main {
  max-width: 800px;
  margin: 0 auto;
  padding: 2rem 1.5rem 4rem;
}

.form fieldset {
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  padding: 1.5rem;
  margin: 0 0 1.5rem;
}

.form legend {
  font-family: var(--font-heading);
  font-weight: 700;
  padding: 0 0.5rem;
  font-size: 1.1rem;
}

.form label {
  display: block;
  margin-bottom: 1rem;
  font-size: 0.95rem;
}

.form input,
.form textarea,
.form select {
  display: block;
  width: 100%;
  margin-top: 0.25rem;
  padding: 0.6rem 0.75rem;
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  font-family: inherit;
  font-size: 1rem;
  background: #fff;
}

.form input:focus,
.form textarea:focus,
.form select:focus {
  outline: 2px solid var(--c-primary);
  outline-offset: 1px;
}

.form textarea {
  resize: vertical;
  min-height: 80px;
}

.services-list {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  margin-bottom: 1rem;
}

.service-row {
  display: grid;
  grid-template-columns: 1fr 1fr auto;
  gap: 0.5rem;
  align-items: center;
}

@media (max-width: 600px) {
  .service-row {
    grid-template-columns: 1fr auto;
  }
  .service-row .service-desc {
    grid-column: 1 / -1;
  }
}

.form__actions {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
  margin-top: 1rem;
}

.btn {
  display: inline-block;
  padding: 0.65rem 1.25rem;
  border-radius: var(--radius);
  border: 1px solid transparent;
  font-family: inherit;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
  transition: background-color 0.15s;
}

.btn:focus-visible {
  outline: 2px solid currentColor;
  outline-offset: 2px;
}

.btn--primary {
  background: var(--c-primary);
  color: #fff;
}

.btn--primary:hover:not(:disabled) {
  background: var(--c-primary-dark);
}

.btn--secondary {
  background: transparent;
  color: var(--c-primary);
  border-color: var(--c-primary);
}

.btn--ghost {
  background: transparent;
  color: var(--c-text);
  border-color: var(--c-border);
}

.btn--lg {
  padding: 0.9rem 1.75rem;
  font-size: 1.05rem;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.error-box {
  background: var(--c-error-bg);
  border: 1px solid var(--c-error-border);
  border-radius: var(--radius);
  padding: 1rem 1.25rem;
  margin: 1.5rem 0;
  color: #900;
}

.error-box ul {
  margin: 0.5rem 0 0;
  padding-left: 1.25rem;
}

.preview {
  margin-top: 2rem;
}

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

.preview__header h2 {
  font-family: var(--font-heading);
  margin: 0;
}

.preview__actions {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

#preview-frame {
  width: 100%;
  min-height: 700px;
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  background: #fff;
}

.app-footer {
  padding: 2rem 1.5rem;
  text-align: center;
  color: var(--c-muted);
  font-size: 0.9rem;
  border-top: 1px solid var(--c-border);
}