:root {
  --color-bg-start: #0a1128; /* Deep navy blue */
  --color-bg-end: #02040a;   /* Near black */
  --color-accent: #f59e0b;   /* Premium gold/yellow */
  --color-accent-hover: #fbbf24;
  --color-text-main: #f8fafc;
  --color-text-muted: #94a3b8;
  --color-whatsapp: #25D366;
  --color-whatsapp-hover: #1ebd5a;
  --color-surface: rgba(255, 255, 255, 0.05);
  --color-surface-hover: rgba(255, 255, 255, 0.08);
  --border-color: rgba(255, 255, 255, 0.1);
  --font-sans: 'Inter', system-ui, -apple-system, sans-serif;
  --max-width: 1100px;
  --spacing-section: 5rem;
}

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

body {
  font-family: var(--font-sans);
  background: linear-gradient(135deg, var(--color-bg-start) 0%, var(--color-bg-end) 100%);
  background-attachment: fixed;
  color: var(--color-text-main);
  line-height: 1.6;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 {
  line-height: 1.2;
  font-weight: 700;
  margin-bottom: 1rem;
}

h1 {
  font-size: 2.5rem;
  letter-spacing: -0.02em;
  background: linear-gradient(to right, #fff, #cbd5e1);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

h2 {
  font-size: 2rem;
  margin-bottom: 1.5rem;
  color: #fff;
}

h3 {
  font-size: 1.25rem;
  color: var(--color-text-main);
}

p {
  margin-bottom: 1.5rem;
  color: var(--color-text-muted);
}

ul {
  list-style: none;
  margin-bottom: 1.5rem;
}

li {
  position: relative;
  padding-left: 1.5rem;
  margin-bottom: 0.75rem;
  color: var(--color-text-muted);
}

li::before {
  content: '→';
  position: absolute;
  left: 0;
  color: var(--color-accent);
}

a {
  color: var(--color-accent);
  text-decoration: none;
  transition: color 0.2s ease;
}

a:hover {
  color: var(--color-accent-hover);
}

/* Layout */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}

section {
  padding: var(--spacing-section) 0;
}

/* Badge */
.badge {
  display: inline-block;
  background: rgba(245, 158, 11, 0.1);
  color: var(--color-accent);
  border: 1px solid rgba(245, 158, 11, 0.2);
  padding: 0.25rem 1rem;
  border-radius: 9999px;
  font-size: 0.875rem;
  font-weight: 600;
  margin-bottom: 1.5rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 1rem 2rem;
  border-radius: 0.5rem;
  font-weight: 600;
  font-size: 1.125rem;
  cursor: pointer;
  transition: all 0.2s ease;
  border: none;
  text-align: center;
  width: 100%;
}

.btn-primary {
  background-color: var(--color-accent);
  color: #000;
  box-shadow: 0 4px 14px 0 rgba(245, 158, 11, 0.39);
}

.btn-primary:hover {
  background-color: var(--color-accent-hover);
  transform: translateY(-2px);
  color: #000;
  box-shadow: 0 6px 20px rgba(245, 158, 11, 0.5);
}

.btn-secondary {
  background-color: transparent;
  color: var(--color-text-main);
  border: 1px solid var(--border-color);
}

.btn-secondary:hover {
  background-color: var(--color-surface);
  color: #fff;
}

.btn-whatsapp {
  background-color: var(--color-whatsapp);
  color: #fff;
  box-shadow: 0 4px 14px 0 rgba(37, 211, 102, 0.39);
}

.btn-whatsapp:hover {
  background-color: var(--color-whatsapp-hover);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(37, 211, 102, 0.5);
}

/* Hero Section */
.hero {
  padding: 6rem 0 4rem;
  text-align: center;
}

.hero-subtitle {
  font-size: 1.25rem;
  color: var(--color-text-muted);
  max-width: 800px;
  margin: 0 auto 1.5rem;
}

.hero-support {
  font-size: 1rem;
  color: var(--color-text-muted);
  max-width: 600px;
  margin: 0 auto 2.5rem;
  font-style: italic;
}

.hero-ctas {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  max-width: 400px;
  margin: 0 auto;
}

/* Sticky CTA Mobile */
.sticky-cta-mobile {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 1rem;
  background: rgba(2, 4, 10, 0.95);
  backdrop-filter: blur(10px);
  border-top: 1px solid var(--border-color);
  z-index: 50;
  display: flex;
  justify-content: center;
}

.sticky-cta-mobile .btn {
  width: 100%;
  max-width: 400px;
}

/* Cards & Surfaces */
.card {
  background-color: var(--color-surface);
  border: 1px solid var(--border-color);
  border-radius: 1rem;
  padding: 2rem;
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.card:hover {
  border-color: rgba(255, 255, 255, 0.2);
  background-color: var(--color-surface-hover);
}

.grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}

/* Form */
.registration-section {
  background-color: var(--color-surface);
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
}

.form-container {
  max-width: 600px;
  margin: 0 auto;
  background: rgba(255, 255, 255, 0.02);
  padding: 2.5rem;
  border-radius: 1rem;
  border: 1px solid var(--border-color);
}

.form-group {
  margin-bottom: 1.5rem;
}

.form-label {
  display: block;
  margin-bottom: 0.5rem;
  font-weight: 500;
  color: var(--color-text-main);
}

.form-control {
  width: 100%;
  padding: 0.875rem 1rem;
  background-color: rgba(0, 0, 0, 0.2);
  border: 1px solid var(--border-color);
  border-radius: 0.5rem;
  color: #fff;
  font-family: var(--font-sans);
  font-size: 1rem;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.form-control:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(245, 158, 11, 0.2);
}

select.form-control {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/200.svg' fill='none' viewBox='0 0 24 24' stroke='%2394a3b8'%3E%3Cpath stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M19 9l-7 7-7-7'%3E%3C/path%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 1rem center;
  background-size: 1.25rem;
  padding-right: 2.5rem;
}

select.form-control option {
  background-color: var(--color-bg-end);
  color: #fff;
}

.form-checkbox-group {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
}

.form-checkbox {
  margin-top: 0.25rem;
  width: 1.25rem;
  height: 1.25rem;
  accent-color: var(--color-accent);
}

.form-text-small {
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

/* Steps (Program) */
.step-list {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.step-item {
  display: flex;
  gap: 1.5rem;
  background: var(--color-surface);
  padding: 1.5rem;
  border-radius: 1rem;
  border: 1px solid var(--border-color);
}

.step-number {
  flex-shrink: 0;
  width: 3rem;
  height: 3rem;
  background-color: rgba(245, 158, 11, 0.1);
  color: var(--color-accent);
  border: 1px solid rgba(245, 158, 11, 0.2);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1.25rem;
}

.step-content h3 {
  margin-bottom: 0.25rem;
}

.step-content p {
  margin-bottom: 0;
}

/* Thank you page */
.thank-you-section {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  padding: 2rem;
}

.thank-you-card {
  max-width: 600px;
  width: 100%;
}

.icon-success {
  width: 80px;
  height: 80px;
  background-color: rgba(37, 211, 102, 0.1);
  color: var(--color-whatsapp);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 2rem;
  font-size: 2.5rem;
}

/* Desktop Enhancements */
@media (min-width: 768px) {
  h1 { font-size: 3.5rem; }
  h2 { font-size: 2.5rem; }
  
  .hero-ctas {
    flex-direction: row;
    justify-content: center;
    max-width: none;
  }
  
  .hero-ctas .btn {
    width: auto;
    min-width: 200px;
  }
  
  .grid-2 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(3, 1fr); }
  
  .sticky-cta-mobile {
    display: none;
  }
}