/* =========================
   RESET & BASE
========================= */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Colors */
    --primary: #667eea;
    --primary-dark: #5568d3;
    --secondary: #764ba2;
    --success: #10b981;
    --error: #ef4444;
    
    --text-primary: #1f2937;
    --text-secondary: #6b7280;
    --bg-white: #ffffff;
    --bg-gray: #f9fafb;
    --border-gray: #e5e7eb;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
    
    /* Typography */
    --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 
                 'Helvetica Neue', Arial, sans-serif;
    
    /* Border radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-full: 9999px;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-white);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* =========================
   UTILITIES
========================= */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.section-title {
    font-size: 2.5rem;
    font-weight: 800;
    text-align: center;
    margin-bottom: var(--spacing-xl);
    color: var(--text-primary);
    line-height: 1.2;
}

/* =========================
   HERO SECTION
========================= */
.hero {
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    color: var(--bg-white);
    padding: var(--spacing-2xl) var(--spacing-md);
    min-height: 600px;
    display: flex;
    align-items: center;
}

.hero-content {
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}

.hero-title {
    font-size: 3rem;
    font-weight: 900;
    margin-bottom: var(--spacing-md);
    line-height: 1.2;
}

.hero-subtitle {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-xl);
    opacity: 0.95;
    line-height: 1.6;
}

.cta-button {
    display: inline-block;
    background-color: var(--bg-white);
    color: var(--primary);
    padding: 1.125rem 2.5rem;
    border-radius: var(--radius-full);
    text-decoration: none;
    font-weight: 700;
    font-size: 1.125rem;
    transition: all 0.3s ease;
    box-shadow: var(--shadow-lg);
    cursor: pointer;
    border: none;
}

.cta-button:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-xl);
}

.cta-button.secondary {
    background-color: var(--primary);
    color: var(--bg-white);
}

.hero-benefits {
    margin-top: var(--spacing-xl);
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
    flex-wrap: wrap;
    font-size: 0.95rem;
}

.benefit {
    white-space: nowrap;
}

/* =========================
   PROBLEM SECTION
========================= */
.problem {
    padding: var(--spacing-2xl) var(--spacing-md);
    background-color: var(--bg-gray);
}

.problem-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
}

.problem-card {
    background-color: var(--bg-white);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.problem-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.problem-icon {
    font-size: 2rem;
    display: block;
    margin-bottom: var(--spacing-sm);
}

.problem-text {
    font-size: 1.125rem;
    color: var(--text-primary);
    line-height: 1.5;
}

.problem-footer {
    text-align: center;
    font-size: 1.25rem;
    font-style: italic;
    color: var(--primary);
    font-weight: 600;
    line-height: 1.6;
}

/* =========================
   SOLUTION SECTION
========================= */
.solution {
    padding: var(--spacing-2xl) var(--spacing-md);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-xl);
}

.feature-card {
    text-align: center;
}

.feature-icon {
    font-size: 4rem;
    margin-bottom: var(--spacing-md);
    display: block;
}

.feature-title {
    font-size: 1.375rem;
    margin-bottom: var(--spacing-sm);
    color: var(--primary);
    font-weight: 700;
    line-height: 1.4;
}

.feature-description {
    font-size: 1rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* =========================
   PRICING SECTION
========================= */
.pricing {
    padding: var(--spacing-2xl) var(--spacing-md);
    background-color: var(--bg-gray);
}

.pricing-card {
    max-width: 450px;
    margin: 0 auto;
    background-color: var(--bg-white);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    text-align: center;
}

.pricing-badge {
    display: inline-block;
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    color: var(--bg-white);
    padding: 0.5rem 1.25rem;
    border-radius: var(--radius-full);
    margin-bottom: var(--spacing-lg);
    font-weight: 700;
    font-size: 0.875rem;
    letter-spacing: 0.05em;
}

.pricing-price {
    margin-bottom: var(--spacing-sm);
}

.price-value {
    font-size: 4rem;
    font-weight: 900;
    color: var(--primary);
    line-height: 1;
}

.price-period {
    font-size: 1.5rem;
    color: var(--text-secondary);
}

.pricing-note {
    font-size: 1rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-lg);
}

.pricing-features {
    list-style: none;
    margin-bottom: var(--spacing-lg);
    text-align: left;
}

.pricing-features li {
    font-size: 1.125rem;
    padding: var(--spacing-sm) 0;
    color: var(--text-primary);
}

.pricing-later {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-lg);
}

/* =========================
   FORM SECTION
========================= */
.form-section {
    padding: var(--spacing-2xl) var(--spacing-md);
}

.form-subtitle {
    text-align: center;
    font-size: 1.125rem;
    color: var(--primary);
    font-weight: 700;
    margin-bottom: var(--spacing-xl);
}

.beta-form {
    max-width: 650px;
    margin: 0 auto;
}

.form-group {
    margin-bottom: var(--spacing-lg);
}

.form-label {
    display: block;
    margin-bottom: var(--spacing-xs);
    font-weight: 600;
    color: var(--text-primary);
    font-size: 1rem;
}

.required {
    color: var(--error);
}

.form-input,
.form-select,
.form-textarea {
    width: 100%;
    padding: 0.875rem;
    border: 2px solid var(--border-gray);
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-family: var(--font-sans);
    transition: border-color 0.2s ease;
    background-color: var(--bg-white);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.form-textarea {
    resize: vertical;
    min-height: 100px;
}

.form-hint {
    display: block;
    margin-top: var(--spacing-xs);
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.submit-button {
    width: 100%;
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    color: var(--bg-white);
    padding: 1.125rem;
    border: none;
    border-radius: var(--radius-full);
    font-size: 1.25rem;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: var(--shadow-md);
}

.submit-button:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

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

.loader {
    display: inline-block;
}

.error-message {
    margin-top: var(--spacing-md);
    padding: var(--spacing-md);
    background-color: #fee2e2;
    border: 1px solid var(--error);
    border-radius: var(--radius-md);
    color: var(--error);
    text-align: center;
    font-weight: 600;
}

.success-message {
    max-width: 650px;
    margin: 0 auto;
    text-align: center;
    background-color: #d1fae5;
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
}

.success-icon {
    font-size: 4rem;
    margin-bottom: var(--spacing-md);
}

.success-title {
    font-size: 1.875rem;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
}

.success-text {
    font-size: 1.125rem;
    margin-bottom: var(--spacing-md);
    color: var(--text-secondary);
    line-height: 1.6;
}

.whatsapp-link {
    color: var(--primary);
    font-weight: 700;
    text-decoration: none;
}

.whatsapp-link:hover {
    text-decoration: underline;
}

.success-signature {
    font-size: 1rem;
    font-style: italic;
    color: var(--text-secondary);
    margin-top: var(--spacing-lg);
}

/* =========================
   FOOTER
========================= */
.footer {
    background-color: var(--text-primary);
    color: var(--bg-white);
    padding: var(--spacing-xl) var(--spacing-md);
    text-align: center;
}

.footer-text {
    margin-bottom: var(--spacing-md);
    opacity: 0.9;
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: var(--spacing-lg);
    flex-wrap: wrap;
}

.footer-link {
    color: var(--bg-white);
    text-decoration: none;
    opacity: 0.8;
    transition: opacity 0.2s ease;
}

.footer-link:hover {
    opacity: 1;
    text-decoration: underline;
}

/* =========================
   RESPONSIVE
========================= */
@media (max-width: 768px) {
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-subtitle {
        font-size: 1.125rem;
    }
    
    .section-title {
        font-size: 1.875rem;
    }
    
    .hero-benefits {
        flex-direction: column;
        align-items: center;
    }
    
    .problem-grid,
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .price-value {
        font-size: 3rem;
    }
}

@media (max-width: 480px) {
    .hero {
        padding: var(--spacing-xl) var(--spacing-md);
    }
    
    .hero-title {
        font-size: 1.75rem;
    }
    
    .cta-button {
        padding: 1rem 2rem;
        font-size: 1rem;
    }
}

/* =========================
   ANIMATIONS
========================= */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.hero-content {
    animation: fadeIn 0.8s ease-out;
}