/* Base & Variables */
:root {
  --color-red: #D31225;
  --color-red-dark: #a80e1c;
  --color-black: #111111;
  --color-black-light: #2A2A2A;
  --color-white: #FFFFFF;
  --color-gray-50: #f8f9fa;
  --color-gray-100: #f1f3f5;
  --color-gray-200: #e9ecef;
  --color-gray-600: #6c757d;
  --color-gray-800: #343a40;
  
  --font-main: 'Montserrat', sans-serif;
  
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.12), 0 1px 2px rgba(0,0,0,0.24);
  --shadow-md: 0 4px 6px rgba(0,0,0,0.1);
  
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-main);
  color: var(--color-black-light);
  background-color: var(--color-white);
  line-height: 1.6;
  overflow-x: hidden;
}

/* Typography */
.text-red { color: var(--color-red); }
.text-white { color: var(--color-white); }
.text-gray { color: var(--color-gray-600); }
.text-black { color: var(--color-black); }
.text-center { text-align: center; }
.font-medium { font-weight: 500; }
.font-bold { font-weight: 700; }
.text-lg { font-size: 1.125rem; }

h1, h2, h3, h4 {
  line-height: 1.3;
  font-weight: 700;
  color: var(--color-black);
}

/* Layout */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}
.container-narrow { max-width: 900px; }
.mt-2 { margin-top: 0.5rem; }
.mt-4 { margin-top: 1rem; }
.mt-6 { margin-top: 1.5rem; }
.mt-8 { margin-top: 2rem; }
.mb-2 { margin-bottom: 0.5rem; }
.mb-4 { margin-bottom: 1rem; }
.w-full { width: 100%; }
.max-w-2xl { max-width: 42rem; }
.mx-auto { margin-left: auto; margin-right: auto; }

/* Grid System */
.grid {
  display: grid;
  gap: 24px;
}
.grid-4 { grid-template-columns: repeat(4, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }

@media (max-width: 992px) {
  .cols-md-2 { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
  .cols-sm-1 { grid-template-columns: 1fr; }
}

/* Logos */
.logos-wrapper {
  display: flex;
  align-items: center;
  gap: 20px;
}
.logo-img {
  height: 48px;
  width: auto;
  object-fit: contain;
}
.seviai-logo { height: 65px; }
.helvetia-logo { height: 40px; }
.logo-separator {
  color: var(--color-gray-200);
  font-size: 24px;
  font-weight: 300;
}
.footer-logo {
  filter: brightness(0) invert(1);
  opacity: 0.9;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  font-weight: 600;
  font-family: var(--font-main);
  border-radius: var(--radius-sm);
  cursor: pointer;
  text-decoration: none;
  transition: var(--transition-fast);
  border: 1px solid transparent;
  font-size: 1rem;
}
.btn-sm {
  padding: 8px 16px;
  font-size: 0.875rem;
}
.btn-primary {
  background-color: var(--color-red);
  color: var(--color-white);
}
.btn-primary:hover {
  background-color: var(--color-red-dark);
}
.btn-outline {
  background-color: transparent;
  color: var(--color-black);
  border-color: var(--color-gray-200);
}
.btn-outline:hover {
  border-color: var(--color-black);
}
.btn-outline-red {
  background-color: transparent;
  color: var(--color-red);
  border-color: var(--color-red);
}
.btn-outline-red:hover {
  background-color: var(--color-red);
  color: var(--color-white);
}

.badge {
  display: inline-block;
  padding: 6px 12px;
  background-color: var(--color-gray-100);
  color: var(--color-black-light);
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  font-weight: 600;
  margin-bottom: 16px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

/* Header */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  background: var(--color-white);
  z-index: 100;
  border-bottom: 1px solid var(--color-gray-200);
  padding: 16px 0;
  transition: var(--transition-normal);
}
.header-scrolled {
  padding: 12px 0;
  box-shadow: var(--shadow-sm);
}
.header-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

/* Sections */
.section { padding: 80px 0; }
.section-light { background-color: var(--color-white); }
.section-gray { background-color: var(--color-gray-50); }

.section-title {
  font-size: 2.25rem;
  margin-bottom: 16px;
}
.section-desc {
  font-size: 1.125rem;
  color: var(--color-gray-600);
  margin-bottom: 48px;
}

/* Hero Section */
.hero {
  padding: 140px 0 60px;
  background-color: var(--color-gray-50);
  border-bottom: 1px solid var(--color-gray-200);
}
.hero-container {
  display: grid;
  grid-template-columns: 1fr 1fr; /* Balanceado 50/50 */
  gap: 48px;
  align-items: center;
}
.hero-title {
  font-size: 3rem;
  margin-bottom: 24px;
}
.hero-subtitle {
  font-size: 1.25rem;
  color: var(--color-gray-600);
  margin-bottom: 32px;
}

/* Quiz Block */
.quiz-block {
  padding: 32px;
  background: var(--color-white);
  border: 1px solid var(--color-gray-200);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  border-top: 4px solid var(--color-red);
}
.quiz-form {
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.quiz-label {
  display: flex;
  align-items: center;
  gap: 12px;
  cursor: pointer;
  padding: 12px 16px;
  background: var(--color-gray-50);
  border-radius: var(--radius-sm);
  transition: var(--transition-fast);
  font-size: 1rem;
  border: 1px solid var(--color-gray-200);
}
.quiz-label:hover {
  border-color: var(--color-gray-600);
}
.quiz-check {
  width: 20px;
  height: 20px;
  accent-color: var(--color-red);
}
.quiz-alert {
  background: var(--color-red);
  color: var(--color-white);
  padding: 16px;
  border-radius: var(--radius-sm);
  font-size: 1rem;
  display: flex;
  gap: 10px;
  align-items: center;
  font-weight: 500;
}

/* Serious Cards (Aesthetic from screenshots) */
.serious-card {
  background: var(--color-white);
  border: 1px solid var(--color-gray-200);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: var(--transition-fast);
  display: flex;
  flex-direction: column;
}
.serious-card:hover {
  box-shadow: var(--shadow-md);
}
.serious-card-header {
  background-color: var(--color-red);
  padding: 24px;
  color: var(--color-white);
}
.serious-card-header h3 {
  color: var(--color-white);
  margin: 0;
  font-size: 1.25rem;
}
.serious-card-body {
  padding: 24px;
  flex: 1;
}
.cover-list {
  list-style: none;
}
.cover-list li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  color: var(--color-gray-800);
  margin-bottom: 16px;
}
.cover-list li i {
  color: var(--color-red);
  margin-top: 2px;
}

/* Real Story Block */
.real-story-block {
  background: var(--color-white);
  border: 1px solid var(--color-gray-200);
  border-left: 4px solid var(--color-black);
  border-radius: var(--radius-md);
  padding: 32px;
  display: flex;
  gap: 24px;
  align-items: flex-start;
  box-shadow: var(--shadow-sm);
  margin-top: 40px;
}
.story-icon {
  font-size: 32px;
  color: var(--color-black);
  flex-shrink: 0;
}
.story-title {
  font-size: 1.25rem;
  margin-bottom: 12px;
}

/* SeviAI Ayuda (Now light/gray background to match serious tone) */
#seviai-ayuda {
  position: relative;
  background-color: var(--color-gray-50);
  border-top: 1px solid var(--color-gray-200);
  overflow: hidden;
}
#seviai-ayuda::before {
  content: "";
  position: absolute;
  top: 0; 
  left: 0; 
  width: 100%; 
  height: 100%;
  background-image: url('img/tarjeta.jpg');
  background-size: cover;
  background-position: center;
  opacity: 0.08;
  z-index: 0;
  pointer-events: none;
}
#seviai-ayuda .container {
  position: relative;
  z-index: 1;
}
.seviai-serious-card {
  background: var(--color-white);
  border: 1px solid var(--color-gray-200);
  padding: 32px 24px;
  border-radius: var(--radius-md);
  text-align: center;
  transition: var(--transition-fast);
}
.seviai-serious-card:hover {
  border-color: var(--color-red);
  box-shadow: var(--shadow-sm);
}
.seviai-serious-card i {
  font-size: 48px;
  color: var(--color-red);
  margin-bottom: 20px;
  display: inline-block;
}
.seviai-serious-card p {
  font-size: 1.125rem;
}

/* Feature boxes */
.feature-box {
  padding: 24px;
  border: 1px solid var(--color-gray-200);
  border-radius: var(--radius-md);
  background: var(--color-white);
  transition: var(--transition-fast);
}
.feature-box:hover {
  box-shadow: var(--shadow-sm);
  border-color: var(--color-gray-600);
}
.feature-box i {
  font-size: 32px;
  color: var(--color-red);
  margin-bottom: 16px;
  display: inline-block;
}

/* Audience List */
.checklist {
  list-style: none;
}
.checklist li {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  margin-bottom: 20px;
  font-size: 1.125rem;
}
.check-icon {
  color: var(--color-red);
  font-size: 24px;
  line-height: 1;
}

/* Form */
.cta-form-container {
  background: var(--color-white);
  padding: 40px;
  border: 1px solid var(--color-gray-200);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
  border-top: 4px solid var(--color-red);
}
.form-group {
  margin-bottom: 20px;
}
.form-group label {
  display: block;
  font-size: 0.875rem;
  font-weight: 600;
  margin-bottom: 8px;
}
.form-group input,
.form-group textarea {
  width: 100%;
  padding: 12px 16px;
  border: 1px solid var(--color-gray-200);
  border-radius: var(--radius-sm);
  font-family: var(--font-main);
  background: var(--color-white);
}
.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-red);
}

/* Trust Block */
.trust-block {
  padding: 24px 0;
  background: var(--color-white);
  border-top: 1px solid var(--color-gray-200);
}
.trust-content {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  color: var(--color-gray-600);
  font-size: 0.875rem;
}

/* Footer */
.footer {
  background: var(--color-black);
  padding: 60px 0 40px;
}
.footer-container {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
}
.footer-links a {
  color: var(--color-gray-200);
  text-decoration: none;
  margin-left: 24px;
  font-size: 0.875rem;
}
.footer-links a:hover {
  color: var(--color-white);
}

/* Sticky Mobile CTA */
.sticky-cta-mobile {
  position: fixed;
  bottom: 0;
  left: 0;
  width: 100%;
  padding: 16px;
  background: var(--color-white);
  box-shadow: 0 -4px 10px rgba(0,0,0,0.1);
  z-index: 1000;
  transform: translateY(100%);
  transition: var(--transition-normal);
  border-top: 1px solid var(--color-gray-200);
}
.sticky-cta-mobile.show {
  transform: translateY(0);
}

/* Animations */
.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.reveal.active {
  opacity: 1;
  transform: translateY(0);
}
.delay-1 { transition-delay: 0.1s; }
.delay-2 { transition-delay: 0.2s; }
.delay-3 { transition-delay: 0.3s; }

@media (max-width: 992px) {
  .hero-container {
    grid-template-columns: 1fr;
  }
}
@media (max-width: 768px) {
  .hero-title { font-size: 2.25rem; }
  .footer-container {
    flex-direction: column;
    align-items: flex-start;
    gap: 32px;
  }
  .footer-links {
    display: flex;
    flex-direction: column;
    gap: 16px;
  }
  .footer-links a { margin-left: 0; }
  .real-story-block { flex-direction: column; }
}
@media (min-width: 769px) {
  .sticky-cta-mobile { display: none !important; }
}