/* ===============================================
   ZAP NOTA - CSS Styles
   Landing Page - Identidade Visual
   =============================================== */

/* ===============================================
   CSS Custom Properties (Variáveis)
   =============================================== */
:root {
    /* Cores Principais */
    --color-primary: #25D366;
    --color-primary-dark: #128C7E;
    --color-primary-light: #DCF8C6;
    
    /* Cores Neutras */
    --color-white: #FFFFFF;
    --color-gray-50: #F5F5F5;
    --color-gray-200: #E0E0E0;
    --color-gray-400: #9E9E9E;
    --color-gray-600: #616161;
    --color-text: #333333;
    --color-text-dark: #1A1A1A;
    
    /* Cores de Status */
    --color-success: #4CAF50;
    --color-warning: #FF9800;
    --color-error: #F44336;
    
    /* Tipografia */
    --font-family: 'Inter', system-ui, -apple-system, sans-serif;
    
    /* Espaçamento */
    --spacing-xs: 8px;
    --spacing-sm: 16px;
    --spacing-md: 24px;
    --spacing-lg: 48px;
    --spacing-xl: 80px;
    
    /* Bordas */
    --border-radius-sm: 8px;
    --border-radius-md: 12px;
    --border-radius-lg: 20px;
    
    /* Sombras */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.12);
    
    /* Transições */
    --transition-fast: 200ms ease;
    --transition-normal: 300ms ease;
}

/* ===============================================
   Reset & Base
   =============================================== */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-family);
    font-size: 1rem;
    line-height: 1.6;
    color: var(--color-text);
    background-color: var(--color-white);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

a {
    color: inherit;
    text-decoration: none;
}

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    background: none;
}

input {
    font-family: inherit;
    border: none;
    outline: none;
}

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

/* ===============================================
   Tipografia
   =============================================== */
h1, h2, h3, h4 {
    font-weight: 700;
    line-height: 1.2;
    color: var(--color-text-dark);
}

h1 {
    font-size: clamp(2rem, 5vw, 3.5rem);
    letter-spacing: -0.02em;
}

h2 {
    font-size: clamp(1.75rem, 4vw, 2.5rem);
    letter-spacing: -0.01em;
    text-align: center;
    margin-bottom: var(--spacing-lg);
}

h3 {
    font-size: 1.25rem;
    font-weight: 600;
}

p {
    color: var(--color-gray-600);
}

/* ===============================================
   Botões
   =============================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: 1rem;
    font-weight: 700;
    border-radius: var(--border-radius-sm);
    transition: all var(--transition-fast);
    cursor: pointer;
}

.btn-primary {
    background-color: var(--color-primary);
    color: var(--color-white);
}

.btn-primary:hover {
    background-color: var(--color-primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-primary:active {
    transform: translateY(0);
}

.btn-sm {
    padding: var(--spacing-xs) var(--spacing-sm);
    font-size: 0.875rem;
}

.btn-lg {
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: 1rem;
    width: 100%;
}

/* ===============================================
   Header
   =============================================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background-color: var(--color-white);
    box-shadow: var(--shadow-sm);
    z-index: 1000;
}

.header .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.logo-icon {
    font-size: 1.75rem;
}

.logo-text {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-primary);
    letter-spacing: 0.05em;
}

.nav {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.nav a:not(.btn) {
    color: var(--color-gray-600);
    font-weight: 500;
    transition: color var(--transition-fast);
}

.nav a:not(.btn):hover {
    color: var(--color-primary);
}

/* ===============================================
   Hero Section
   =============================================== */
.hero {
    padding-top: 160px;
    padding-bottom: var(--spacing-xl);
    background: linear-gradient(135deg, var(--color-white) 0%, var(--color-gray-50) 100%);
    text-align: center;
}

.hero-content {
    max-width: 640px;
    margin: 0 auto;
}

.hero h1 {
    margin-bottom: var(--spacing-sm);
}

.subtitle {
    font-size: 1.25rem;
    color: var(--color-gray-600);
    margin-bottom: var(--spacing-lg);
}

/* ===============================================
   Formulário
   =============================================== */
.form-hero,
.form-cta {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
}

.input-group input {
    width: 100%;
    padding: var(--spacing-sm);
    font-size: 1rem;
    border: 1px solid var(--color-gray-200);
    border-radius: var(--border-radius-sm);
    background-color: var(--color-white);
    transition: all var(--transition-fast);
}

.input-group input:focus {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px var(--color-primary-light);
}

.form-note,
.cta-note {
    font-size: 0.875rem;
    color: var(--color-gray-400);
}

/* ===============================================
   Sections
   =============================================== */
.section {
    padding: var(--spacing-xl) 0;
}

.section-problem {
    background-color: var(--color-gray-50);
}

.section-solution {
    background-color: var(--color-white);
}

.section-how {
    background-color: var(--color-gray-50);
}

.section-testimonials {
    background-color: var(--color-white);
}

.section-faq {
    background-color: var(--color-gray-50);
}

.section-cta {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    color: var(--color-white);
    text-align: center;
}

.section-cta h2,
.section-cta .cta-subtitle {
    color: var(--color-white);
}

.section-cta .cta-note {
    color: rgba(255, 255, 255, 0.8);
}

.section-cta .btn-primary {
    background-color: var(--color-white);
    color: var(--color-primary);
}

.section-cta .btn-primary:hover {
    background-color: var(--color-gray-50);
}

.section-cta .input-group input {
    border-color: transparent;
}

/* ===============================================
   Pains Grid
   =============================================== */
.pains-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.pain-card {
    background-color: var(--color-white);
    padding: var(--spacing-md);
    border-radius: var(--border-radius-md);
    text-align: center;
    box-shadow: var(--shadow-sm);
    transition: transform var(--transition-fast);
}

.pain-card:hover {
    transform: translateY(-4px);
}

.pain-emoji {
    font-size: 2.5rem;
    display: block;
    margin-bottom: var(--spacing-sm);
}

.pain-card p {
    font-size: 0.875rem;
    color: var(--color-text);
    font-weight: 500;
}

/* ===============================================
   Benefits Grid
   =============================================== */
.benefits-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: var(--spacing-md);
}

.benefit-card {
    background-color: var(--color-white);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius-md);
    text-align: center;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--color-gray-200);
    transition: all var(--transition-fast);
}

.benefit-card:hover {
    border-color: var(--color-primary);
    box-shadow: var(--shadow-md);
}

.benefit-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-sm);
}

.benefit-card h3 {
    margin-bottom: var(--spacing-xs);
    color: var(--color-text-dark);
}

.benefit-card p {
    font-size: 0.875rem;
}

/* ===============================================
   Steps
   =============================================== */
.steps {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.step {
    flex: 1;
    min-width: 180px;
    max-width: 280px;
    text-align: center;
    padding: var(--spacing-md);
    background-color: var(--color-white);
    border-radius: var(--border-radius-md);
    box-shadow: var(--shadow-sm);
}

.step-number {
    font-size: 3rem;
    margin-bottom: var(--spacing-sm);
}

.step h3 {
    margin-bottom: var(--spacing-xs);
}

.step p {
    font-size: 0.875rem;
}

.step-arrow {
    font-size: 2rem;
    color: var(--color-primary);
    font-weight: 700;
}

/* ===============================================
   Demonstração Section
   =============================================== */
.section-demo {
    background-color: var(--color-white);
    padding: var(--spacing-xl) 0;
}

.section-demo h2 {
    text-align: center;
    margin-bottom: var(--spacing-xs);
}

.demo-subtitle {
    text-align: center;
    color: var(--color-gray-600);
    margin-bottom: var(--spacing-lg);
}

.demo-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
    align-items: start;
}

.demo-step {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.phone-frame {
    background: var(--color-gray-100);
    border-radius: 20px;
    padding: 0;
    box-shadow: var(--shadow-md);
    width: 100%;
    max-width: 280px;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
}

.phone-frame img {
    width: 100%;
    height: auto;
    display: block;
    border-radius: 20px;
}

.phone-placeholder {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-lg);
    background: var(--color-gray-50);
    border-radius: 20px;
    min-height: 400px;
}

.phone-placeholder span {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-xs);
}

.phone-placeholder p {
    color: var(--color-gray-400);
    font-size: 0.75rem;
}

.demo-caption {
    margin-top: var(--spacing-sm);
    text-align: center;
}

.step-badge {
    display: inline-block;
    background: var(--color-primary);
    color: var(--color-white);
    padding: 4px 12px;
    border-radius: var(--border-radius-lg);
    font-size: 0.75rem;
    font-weight: 600;
    margin-bottom: 4px;
}

.demo-caption h3 {
    font-size: 1rem;
    margin-bottom: 4px;
}

.demo-caption p {
    color: var(--color-gray-600);
    font-size: 0.875rem;
}

.demo-arrows {
    display: none;
}

.demo-nav {
    display: none;
}

.demo-dots {
    display: none;
}

/* ===============================================
   Demo - Mobile Responsivo
   =============================================== */
@media (max-width: 1024px) {
    .demo-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 640px) {
    .demo-grid {
        grid-template-columns: 1fr;
        max-width: 320px;
        margin-left: auto;
        margin-right: auto;
    }
}

/* ===============================================
   Testimonials
   =============================================== */
.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-md);
}

.testimonial-card {
    background-color: var(--color-white);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius-md);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--color-gray-200);
}

.testimonial-text {
    font-size: 1.125rem;
    font-style: italic;
    color: var(--color-text);
    margin-bottom: var(--spacing-md);
    line-height: 1.7;
}

.testimonial-author {
    display: flex;
    flex-direction: column;
    margin-bottom: var(--spacing-sm);
}

.author-name {
    font-weight: 700;
    color: var(--color-text-dark);
}

.author-role {
    font-size: 0.875rem;
    color: var(--color-gray-400);
}

.stars {
    font-size: 1.25rem;
    color: #FFC107;
}

/* ===============================================
   FAQ
   =============================================== */
.faq-list {
    max-width: 800px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.faq-item {
    background-color: var(--color-white);
    border-radius: var(--border-radius-sm);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.faq-question {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-md);
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-text-dark);
    text-align: left;
    transition: background-color var(--transition-fast);
}

.faq-question:hover {
    background-color: var(--color-gray-50);
}

.faq-icon {
    font-size: 0.75rem;
    color: var(--color-gray-400);
    transition: transform var(--transition-fast);
}

.faq-item.active .faq-icon {
    transform: rotate(180deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-normal);
}

.faq-item.active .faq-answer {
    max-height: 200px;
}

.faq-answer p {
    padding: 0 var(--spacing-md) var(--spacing-md);
}

/* ===============================================
   Footer
   =============================================== */
.footer {
    background-color: var(--color-text-dark);
    color: var(--color-white);
    padding: var(--spacing-lg) 0;
    text-align: center;
}

.footer-brand {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
    margin-bottom: var(--spacing-sm);
}

.footer-brand .logo-icon {
    font-size: 1.5rem;
}

.footer-brand .logo-text {
    color: var(--color-white);
}

.footer-tagline {
    color: var(--color-gray-400);
    margin-bottom: var(--spacing-sm);
}

.footer-copy {
    font-size: 0.875rem;
    color: var(--color-gray-400);
    margin-bottom: var(--spacing-md);
}

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

.footer-links a {
    font-size: 0.875rem;
    color: var(--color-gray-400);
    transition: color var(--transition-fast);
}

.footer-links a:hover {
    color: var(--color-white);
}

/* ===============================================
   Modal
   =============================================== */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 2000;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-md);
}

.modal.show {
    display: flex;
}

.modal-content {
    background-color: var(--color-white);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius-md);
    max-width: 400px;
    width: 100%;
    text-align: center;
    position: relative;
}

.modal-close {
    position: absolute;
    top: var(--spacing-sm);
    right: var(--spacing-sm);
    font-size: 1.5rem;
    color: var(--color-gray-400);
    cursor: pointer;
    transition: color var(--transition-fast);
}

.modal-close:hover {
    color: var(--color-text);
}

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

.modal-content h3 {
    margin-bottom: var(--spacing-sm);
}

.modal-content p {
    color: var(--color-gray-600);
}

/* ===============================================
   Responsivo
   =============================================== */
@media (max-width: 768px) {
    .nav {
        display: none;
    }
    
    .hero {
        padding-top: 120px;
    }
    
    .steps {
        flex-direction: column;
    }
    
    .step-arrow {
        transform: rotate(90deg);
    }
    
    .pains-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .benefits-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .pains-grid {
        grid-template-columns: 1fr;
    }
    
    h1 {
        font-size: 1.75rem;
    }
    
    h2 {
        font-size: 1.5rem;
    }
    
    .hero,
    .section {
        padding: var(--spacing-lg) 0;
    }
}

/* ===============================================
   Utilitários
   =============================================== */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}