/* Variables base de la landing. El Agente puede añadir más, pero NO eliminar estas. */
:root {
  --color-bg: #ffffff;
  --color-fg: #111111;
  --color-muted: #6b7280;
  --color-primary: #2563eb;
  --color-primary-hover: #1d4ed8;
  --color-error: #dc2626;
  --color-border: #e5e7eb;

  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;

  --radius: 8px;
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 16px;
  --space-4: 24px;
  --space-5: 32px;
  --space-6: 48px;

  --max-width: 720px;
}

* {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.5;
  color: var(--color-fg);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.landing {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: var(--space-5) var(--space-3);
}

/* Hero */
.hero-title {
  font-size: 1.75rem;
  font-weight: 700;
  margin: 0 0 var(--space-3);
}

.hero-subtitle {
  font-size: 1rem;
  color: var(--color-muted);
  margin: 0 0 var(--space-5);
}

/* Form */
.form {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.form-field {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.form-field label {
  font-size: 0.875rem;
  font-weight: 500;
}

.form-field input[type="text"],
.form-field input[type="email"],
.form-field input[type="tel"] {
  padding: var(--space-2) var(--space-3);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  font-size: 1rem;
  font-family: inherit;
}

.form-field input:focus {
  outline: 2px solid var(--color-primary);
  outline-offset: 1px;
  border-color: var(--color-primary);
}

.form-field-checkbox {
  flex-direction: row;
  align-items: center;
  gap: var(--space-2);
}

.form-field-checkbox label {
  font-weight: 400;
  color: var(--color-muted);
}

.form-submit {
  padding: var(--space-3);
  background: var(--color-primary);
  color: #fff;
  border: 0;
  border-radius: var(--radius);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  font-family: inherit;
}

.form-submit:hover {
  background: var(--color-primary-hover);
}

.form-submit:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

/* Tablet en adelante */
@media (min-width: 768px) {
  .landing {
    padding: var(--space-6) var(--space-4);
  }
  .hero-title {
    font-size: 2.5rem;
  }
}