:root {
  --bg: #f4f1ea;
  --card-bg: #ffffff;
  --accent: #ec5b6a;
  --accent-dark: #c34b57;
  --text: #1e1b16;
  --muted: #5f5a52;
  --border: rgba(30, 27, 22, 0.12);
  --shadow: 0 14px 28px rgba(31, 23, 19, 0.08);
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #151517;
    --card-bg: #1e1f23;
    --accent: #f07f8c;
    --accent-dark: #d66a75;
    --text: #f4f1ea;
    --muted: #b2ada6;
    --border: rgba(244, 241, 234, 0.15);
    --shadow: 0 18px 36px rgba(0, 0, 0, 0.35);
    color-scheme: dark;
  }
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Inter", "Segoe UI", -apple-system, BlinkMacSystemFont, sans-serif;
  line-height: 1.6;
  color: var(--text);
  background: radial-gradient(circle at top left, rgba(236, 91, 106, 0.08), transparent 55%), var(--bg);
  min-height: 100vh;
  padding: 16px;
}

.page-header,
.page-footer {
  max-width: 1120px;
  margin: 0 auto;
  padding: 12px 12px 8px;
}

.page-header h1 {
  margin: 12px 0 8px;
  font-size: clamp(1.8rem, 3vw, 2.4rem);
}

.intro {
  margin-top: 0;
  color: var(--muted);
  max-width: 720px;
}

.back-link {
  display: inline-block;
  color: var(--accent);
  text-decoration: none;
  font-weight: 600;
  letter-spacing: 0.01em;
}

.back-link:hover,
.back-link:focus {
  text-decoration: underline;
}

.layout {
  max-width: 1120px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: clamp(1.5rem, 3vw, 2.5rem);
  padding: 12px;
}

.controls {
  min-width: 0;
}

.control-grid {
  display: flex;
  flex-direction: column;
  gap: clamp(1rem, 2vw, 1.5rem);
}

.field-block {
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: clamp(0.75rem, 1.8vw, 1.25rem);
  background-color: rgba(255, 255, 255, 0.6);
  box-shadow: var(--shadow);
}

@media (prefers-color-scheme: dark) {
  .field-block {
    background-color: rgba(30, 31, 35, 0.8);
  }
}

.field-block legend {
  font-weight: 600;
  color: var(--accent);
  padding: 0 4px;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-top: 10px;
}

.field span {
  font-size: 0.95rem;
  color: var(--muted);
}

select,
textarea,
input[type="text"] {
  width: 100%;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 10px 12px;
  font: inherit;
  color: inherit;
  background-color: rgba(255, 255, 255, 0.9);
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

@media (prefers-color-scheme: dark) {
  select,
  textarea,
  input[type="text"] {
    background-color: rgba(26, 27, 30, 0.95);
  }
}

select:focus,
textarea:focus,
input[type="text"]:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(236, 91, 106, 0.25);
}

textarea {
  resize: vertical;
  min-height: 110px;
}

.checkbox-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 0.6rem 1rem;
  margin-top: 12px;
}

.checkbox-grid label {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  font-size: 0.92rem;
}

.checkbox-grid input {
  margin-top: 4px;
  accent-color: var(--accent);
}

.preview {
  min-width: 0;
}

.preview-card {
  background: var(--card-bg);
  border-radius: 20px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  padding: clamp(1rem, 2vw, 1.5rem);
  display: flex;
  flex-direction: column;
  gap: 1rem;
  min-height: 100%;
}

.preview-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.preview-header h2 {
  margin: 0;
  font-size: clamp(1.2rem, 2.4vw, 1.6rem);
}

.copy-button {
  background: var(--accent);
  border: none;
  border-radius: 999px;
  color: #fff;
  font-weight: 600;
  padding: 10px 18px;
  cursor: pointer;
  transition: background 0.2s ease, transform 0.2s ease;
}

.copy-button:hover,
.copy-button:focus {
  background: var(--accent-dark);
  transform: translateY(-1px);
}

.copy-button:active {
  transform: translateY(0);
}

#promptOutput {
  width: 100%;
  min-height: 280px;
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 14px;
  font: inherit;
  color: inherit;
  background-color: rgba(255, 255, 255, 0.92);
  line-height: 1.55;
  resize: vertical;
}

@media (prefers-color-scheme: dark) {
  #promptOutput {
    background-color: rgba(26, 27, 30, 0.95);
  }
}

.stats {
  display: flex;
  gap: 18px;
  font-size: 0.9rem;
  color: var(--muted);
}

.page-footer {
  text-align: center;
  margin-top: 32px;
  padding-bottom: 32px;
}

.credit {
  margin: 0;
  font-size: 0.95rem;
  color: var(--muted);
}

@media (max-width: 960px) {
  .layout {
    grid-template-columns: 1fr;
  }

  .preview-card {
    order: 2;
  }
}

@media (max-width: 600px) {
  body {
    padding: 12px;
  }

  .page-header,
  .page-footer {
    padding: 12px 4px;
  }

  .checkbox-grid {
    grid-template-columns: 1fr;
  }

  #promptOutput {
    min-height: 220px;
  }
}