/* ══════════════════════════════════════════════════════════════════
   2K CONTABILIDADE - SISTEMA DE DESIGN
   ══════════════════════════════════════════════════════════════════ */

/* RESET E FUNDAMENTOS */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Paleta de Cores */
    --primary-dark: #1e3a5f;
    --primary: #2c5aa0;
    --primary-light: #3d7ac7;
    --primary-lighter: #4a9eff;
    
    --accent: #ff6b35;
    --accent-light: #ffa726;
    
    --neutral-50: #f8f9fa;
    --neutral-100: #e9ecef;
    --neutral-200: #dee2e6;
    --neutral-300: #ced4da;
    --neutral-600: #6c757d;
    --neutral-800: #343a40;
    --neutral-900: #212529;
    
    --white: #ffffff;
    --success: #28a745;
    --warning: #ffc107;
    --danger: #dc3545;
    
    /* Tipografia */
    --font-system: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-mono: 'Courier New', monospace;
    
    /* Espaçamento */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
    --spacing-3xl: 6rem;
    
    /* Layout */
    --max-width: 1200px;
    --border-radius: 8px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-system);
    line-height: 1.7;
    color: var(--neutral-800);
    background: var(--white);
    overflow-x: hidden;
}

/* TIPOGRAFIA */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.3;
    color: var(--primary-dark);
    margin-bottom: var(--spacing-md);
}

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

h2 {
    font-size: clamp(1.75rem, 4vw, 2.5rem);
}

h3 {
    font-size: clamp(1.5rem, 3vw, 2rem);
}

h4 {
    font-size: clamp(1.25rem, 2.5vw, 1.75rem);
}

p {
    margin-bottom: var(--spacing-md);
    font-size: 1.0625rem;
    color: var(--neutral-800);
}

a {
    color: var(--primary);
    text-decoration: none;
    transition: var(--transition);
}

a:hover {
    color: var(--primary-light);
}

/* HEADER E NAVEGAÇÃO */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: var(--white);
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.08);
    z-index: 1000;
    transition: var(--transition);
}

.header-container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: var(--spacing-md) var(--spacing-lg);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo img {
    height: 50px;
    width: auto;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: var(--spacing-lg);
}

.nav-menu a {
    color: var(--primary-dark);
    font-weight: 500;
    font-size: 0.9375rem;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--border-radius);
    transition: var(--transition);
}

.nav-menu a:hover {
    background: var(--neutral-50);
    color: var(--primary);
}

.nav-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    flex-direction: column;
    gap: 5px;
}

.nav-toggle span {
    display: block;
    width: 25px;
    height: 3px;
    background: var(--primary-dark);
    border-radius: 3px;
    transition: var(--transition);
}

/* SEÇÕES PRINCIPAIS */
.section {
    padding: var(--spacing-3xl) var(--spacing-lg);
    position: relative;
}

.section-container {
    max-width: var(--max-width);
    margin: 0 auto;
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-2xl);
}

.section-subtitle {
    color: var(--accent);
    font-weight: 600;
    font-size: 0.9375rem;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    margin-bottom: var(--spacing-sm);
}

.section-title {
    margin-bottom: var(--spacing-md);
}

.section-description {
    font-size: 1.125rem;
    color: var(--neutral-600);
    max-width: 800px;
    margin: 0 auto;
}

/* BACKGROUNDS ALTERNATIVOS */
.bg-light {
    background: var(--neutral-50);
}

.bg-pattern {
    background-image: url('../assets/pattern.svg');
    background-size: 400px 400px;
}

.bg-primary {
    background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 100%);
    color: var(--white);
}

.bg-primary h2,
.bg-primary h3,
.bg-primary h4 {
    color: var(--white);
}

.bg-primary p {
    color: rgba(255, 255, 255, 0.9);
}

/* HERO SECTION */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 80px;
    background: linear-gradient(135deg, rgba(30, 58, 95, 0.97) 0%, rgba(44, 90, 160, 0.95) 100%),
                url('../assets/hero.svg') center/cover;
    color: var(--white);
}

.hero-content {
    max-width: 700px;
}

.hero h1 {
    color: var(--white);
    margin-bottom: var(--spacing-lg);
}

.hero p {
    font-size: 1.25rem;
    color: rgba(255, 255, 255, 0.95);
    margin-bottom: var(--spacing-xl);
}

.hero-cta {
    display: inline-block;
    padding: var(--spacing-md) var(--spacing-xl);
    background: var(--accent);
    color: var(--white);
    font-weight: 600;
    border-radius: var(--border-radius);
    transition: var(--transition);
}

.hero-cta:hover {
    background: var(--accent-light);
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(255, 107, 53, 0.3);
}

/* GRID SYSTEMS */
.grid-2 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-xl);
}

.grid-3 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-lg);
}

/* CARDS */
.card {
    background: var(--white);
    padding: var(--spacing-xl);
    border-radius: var(--border-radius);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    transition: var(--transition);
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.12);
}

.card-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--spacing-md);
    color: var(--white);
    font-size: 1.75rem;
    font-weight: 700;
}

.card h3 {
    margin-bottom: var(--spacing-md);
}

/* BOX DESTAQUE */
.highlight-box {
    background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 100%);
    color: var(--white);
    padding: var(--spacing-xl);
    border-radius: var(--border-radius);
    margin: var(--spacing-xl) 0;
}

.highlight-box h3 {
    color: var(--white);
}

.highlight-box p {
    color: rgba(255, 255, 255, 0.95);
}

/* TABELA COMPARATIVA */
.comparison-table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
    margin: var(--spacing-xl) 0;
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
}

.comparison-table thead {
    background: var(--primary-dark);
    color: var(--white);
}

.comparison-table th,
.comparison-table td {
    padding: var(--spacing-md);
    text-align: left;
}

.comparison-table tbody tr {
    background: var(--white);
}

.comparison-table tbody tr:nth-child(even) {
    background: var(--neutral-50);
}

.comparison-table tbody tr:hover {
    background: var(--neutral-100);
}

/* LISTAS ESTRUTURADAS */
.structured-list {
    list-style: none;
    margin: var(--spacing-lg) 0;
}

.structured-list li {
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-sm);
    background: var(--neutral-50);
    border-left: 4px solid var(--primary);
    border-radius: var(--border-radius);
}

.structured-list li strong {
    color: var(--primary-dark);
    display: block;
    margin-bottom: var(--spacing-xs);
}

/* FAQ ACCORDION */
.faq-container {
    margin: var(--spacing-xl) 0;
}

.faq-item {
    margin-bottom: var(--spacing-md);
    border: 1px solid var(--neutral-200);
    border-radius: var(--border-radius);
    overflow: hidden;
}

.faq-question {
    width: 100%;
    padding: var(--spacing-md) var(--spacing-lg);
    background: var(--white);
    border: none;
    text-align: left;
    font-size: 1.0625rem;
    font-weight: 600;
    color: var(--primary-dark);
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: var(--transition);
}

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

.faq-question::after {
    content: '+';
    font-size: 1.5rem;
    color: var(--primary);
    transition: var(--transition);
}

.faq-question.active::after {
    content: '−';
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
}

.faq-answer-content {
    padding: var(--spacing-md) var(--spacing-lg);
    background: var(--neutral-50);
}

/* FORMULÁRIO */
.form-container {
    max-width: 700px;
    margin: var(--spacing-xl) auto;
    background: var(--white);
    padding: var(--spacing-xl);
    border-radius: var(--border-radius);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
}

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

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

.form-input,
.form-select,
.form-textarea {
    width: 100%;
    padding: var(--spacing-md);
    border: 2px solid var(--neutral-200);
    border-radius: var(--border-radius);
    font-family: var(--font-system);
    font-size: 1rem;
    transition: var(--transition);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(44, 90, 160, 0.1);
}

.form-textarea {
    resize: vertical;
    min-height: 150px;
}

.form-submit {
    width: 100%;
    padding: var(--spacing-md) var(--spacing-lg);
    background: var(--primary);
    color: var(--white);
    border: none;
    border-radius: var(--border-radius);
    font-size: 1.0625rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
}

.form-submit:hover {
    background: var(--primary-light);
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(44, 90, 160, 0.3);
}

.form-submit:active {
    transform: translateY(0);
}

.form-error {
    color: var(--danger);
    font-size: 0.875rem;
    margin-top: var(--spacing-xs);
    display: none;
}

.form-success {
    background: var(--success);
    color: var(--white);
    padding: var(--spacing-md);
    border-radius: var(--border-radius);
    text-align: center;
    margin-bottom: var(--spacing-lg);
    display: none;
}

/* RODAPÉ */
.footer {
    background: var(--neutral-900);
    color: rgba(255, 255, 255, 0.7);
    padding: var(--spacing-xl) var(--spacing-lg) var(--spacing-md);
}

.footer-container {
    max-width: var(--max-width);
    margin: 0 auto;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

.footer-section h4 {
    color: var(--white);
    font-size: 1.125rem;
    margin-bottom: var(--spacing-md);
}

.footer-section p,
.footer-section a {
    font-size: 0.9375rem;
    color: rgba(255, 255, 255, 0.7);
    line-height: 1.8;
}

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

.footer-links {
    list-style: none;
}

.footer-links li {
    margin-bottom: var(--spacing-xs);
}

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-lg);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    font-size: 0.8125rem;
    opacity: 0.5;
}

/* CREDIBILIDADE */
.credentials {
    display: flex;
    gap: var(--spacing-lg);
    align-items: center;
    flex-wrap: wrap;
    margin: var(--spacing-xl) 0;
}

.credential-badge {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-lg);
    background: var(--neutral-50);
    border-radius: var(--border-radius);
    border: 2px solid var(--primary-light);
}

.credential-icon {
    width: 40px;
    height: 40px;
    background: var(--primary);
    color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
}

.credential-text strong {
    display: block;
    color: var(--primary-dark);
    font-size: 0.875rem;
}

.credential-text span {
    font-size: 0.8125rem;
    color: var(--neutral-600);
}

/* RESPONSIVIDADE */
@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 80px;
        left: -100%;
        width: 100%;
        background: var(--white);
        flex-direction: column;
        padding: var(--spacing-lg);
        box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
        transition: var(--transition);
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .nav-toggle {
        display: flex;
    }
    
    .nav-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(7px, 7px);
    }
    
    .nav-toggle.active span:nth-child(2) {
        opacity: 0;
    }
    
    .nav-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -7px);
    }
    
    .section {
        padding: var(--spacing-2xl) var(--spacing-md);
    }
    
    .hero {
        padding-top: 100px;
        padding-left: var(--spacing-md);
        padding-right: var(--spacing-md);
    }
    
    .grid-2,
    .grid-3 {
        grid-template-columns: 1fr;
    }
}

/* ANIMAÇÕES */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in-up {
    animation: fadeInUp 0.6s ease-out;
}

/* UTILITÁRIOS */
.text-center {
    text-align: center;
}

.text-accent {
    color: var(--accent);
}

.mt-xl {
    margin-top: var(--spacing-xl);
}

.mb-xl {
    margin-bottom: var(--spacing-xl);
}