:root {
  --bg: #0d0d0d;
  --bg-card: #161616;
  --bg-input: #1a1a1a;
  --border: #2a2a2a;
  --text: #ffffff;
  --text-muted: #a0a0a0;
  --teal: #005469;
  --teal-hover: #006e88;
  --mustard: #ffe181;
  --font-brand: "Baloo 2", "Segoe UI", system-ui, sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: "Segoe UI", system-ui, -apple-system, sans-serif;
  line-height: 1.5;
}

.site-header {
  padding: 18px 32px;
  border-bottom: 1px solid var(--border);
}

.logo {
  display: flex;
  align-items: center;
  gap: 14px;
}

.logo-img {
  display: block;
  height: 42px;
  width: auto;
}

.logo-suffix {
  font-family: var(--font-brand);
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--text-muted);
  padding-left: 14px;
  border-left: 1px solid var(--border);
}

.container {
  max-width: 900px;
  margin: 0 auto;
  padding: 40px 20px 80px;
}

.form-section h1 {
  font-family: var(--font-brand);
  font-size: 1.9rem;
  font-weight: 700;
  margin: 0 0 8px;
}

.subtitle {
  color: var(--text-muted);
  margin: 0 0 32px;
}

form {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 28px;
}

.form-group {
  margin-bottom: 20px;
}

.form-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--text-muted);
}

input[type="text"],
select {
  width: 100%;
  padding: 12px 14px;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  font-size: 0.95rem;
  transition: border-color 0.15s ease;
}

input[type="text"]:focus,
select:focus {
  outline: none;
  border-color: var(--teal);
}

.btn-primary {
  width: 100%;
  padding: 14px;
  background: var(--teal);
  color: var(--text);
  border: none;
  border-radius: 8px;
  font-family: var(--font-brand);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s ease;
  margin-top: 8px;
}

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

.btn-primary:disabled {
  opacity: 0.7;
  cursor: not-allowed;
}

.error-message {
  margin-top: 16px;
  padding: 14px 16px;
  background: rgba(200, 60, 60, 0.15);
  border: 1px solid rgba(200, 60, 60, 0.4);
  border-radius: 8px;
  color: #ff9a9a;
  font-size: 0.9rem;
}

.results-section {
  margin-top: 48px;
}

.results-section h2 {
  font-family: var(--font-brand);
  font-size: 1.4rem;
  font-weight: 700;
  margin-bottom: 20px;
}

.results-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 20px;
}

.piece-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 22px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.piece-number {
  color: var(--mustard);
  font-weight: 700;
  font-size: 0.85rem;
  letter-spacing: 0.05em;
}

.piece-gancho {
  font-family: var(--font-brand);
  font-size: 1.15rem;
  font-weight: 700;
  line-height: 1.35;
}

.piece-block-label {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  margin-bottom: 6px;
}

.piece-desarrollo {
  margin: 0;
  padding-left: 18px;
  font-size: 0.92rem;
  color: var(--text);
}

.piece-desarrollo li {
  margin-bottom: 6px;
}

.piece-cta {
  font-size: 0.92rem;
  font-style: italic;
  color: var(--mustard);
}

.copy-btn {
  align-self: flex-start;
  padding: 8px 16px;
  background: transparent;
  color: var(--teal-hover);
  border: 1px solid var(--teal);
  border-radius: 6px;
  font-size: 0.82rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s ease, color 0.15s ease;
}

.copy-btn:hover {
  background: var(--teal);
  color: var(--text);
}

.copy-btn.copied {
  background: var(--mustard);
  border-color: var(--mustard);
  color: #0d0d0d;
}

@media (max-width: 640px) {
  .form-row {
    grid-template-columns: 1fr;
  }

  .site-header {
    padding: 14px 20px;
  }

  .logo-img {
    height: 32px;
  }

  .logo-suffix {
    font-size: 0.85rem;
    padding-left: 10px;
  }

  .container {
    padding: 28px 16px 60px;
  }
}