/* Design Institucional Minimalista e Profissional */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Paleta de Cores Minimalista - Baseada em Cinzas */
    --color-primary: #2c3e50;
    --color-primary-dark: #1a252f;
    --color-primary-light: #34495e;
    --color-accent: #3498db;
    --color-accent-dark: #2980b9;
    
    /* Tons de Cinza Profissionais */
    --color-gray-50: #fafafa;
    --color-gray-100: #f5f5f5;
    --color-gray-200: #eeeeee;
    --color-gray-300: #e0e0e0;
    --color-gray-400: #bdbdbd;
    --color-gray-500: #9e9e9e;
    --color-gray-600: #757575;
    --color-gray-700: #616161;
    --color-gray-800: #424242;
    --color-gray-900: #212121;
    
    /* Branco e Preto */
    --color-white: #ffffff;
    --color-black: #000000;
    
    /* Tipografia */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --font-secondary: 'Georgia', serif;
    
    /* Espaçamentos */
    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 1.5rem;
    --space-lg: 2rem;
    --space-xl: 3rem;
    --space-2xl: 5rem;
    --space-3xl: 7rem;
    
    /* Transições */
    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    
    /* Sombras Sutis */
    --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.04);
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.12);
}

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');

body {
    font-family: var(--font-primary);
    font-weight: 400;
    line-height: 1.7;
    color: var(--color-gray-800);
    background: var(--color-white);
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-md);
    width: 100%;
}

/* Header Minimalista */
.header {
    background: var(--color-white);
    border-bottom: 1px solid var(--color-gray-200);
    padding: var(--space-md) 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    backdrop-filter: blur(10px);
    background: rgba(255, 255, 255, 0.98);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--space-lg);
}

.logo {
    display: flex;
    align-items: center;
    text-decoration: none;
}

.logo img {
    height: 48px;
    width: auto;
    max-width: 180px;
    display: block;
}

.logo-text {
    font-size: 1.5rem;
    font-weight: 600;
    letter-spacing: -0.02em;
    color: var(--color-primary);
    text-decoration: none;
}

.nav {
    display: flex;
    gap: var(--space-xl);
    align-items: center;
    list-style: none;
}

.nav-link {
    color: var(--color-gray-700);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.95rem;
    letter-spacing: -0.01em;
    transition: color var(--transition);
    position: relative;
    padding: var(--space-xs) 0;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-primary);
    transition: width var(--transition);
}

.nav-link:hover,
.nav-link.active {
    color: var(--color-primary);
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 100%;
}

.btn-login {
    background: var(--color-primary);
    color: var(--color-white) !important;
    padding: 0.625rem 1.5rem;
    border-radius: 4px;
    font-weight: 500;
    transition: all var(--transition);
    text-decoration: none;
    border: none;
    cursor: pointer;
    font-size: 0.95rem;
}

.btn-login:hover {
    background: var(--color-primary-dark);
}

.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--space-xs);
}

.mobile-menu-toggle span {
    width: 24px;
    height: 2px;
    background: var(--color-gray-800);
    transition: var(--transition);
}

/* Botões Minimalistas */
.btn-primary {
    background: var(--color-primary);
    color: var(--color-white);
    padding: 0.875rem 2rem;
    border-radius: 4px;
    text-decoration: none;
    display: inline-block;
    font-weight: 500;
    font-size: 0.95rem;
    letter-spacing: -0.01em;
    transition: all var(--transition);
    border: 1px solid var(--color-primary);
    cursor: pointer;
}

.btn-primary:hover {
    background: var(--color-primary-dark);
    border-color: var(--color-primary-dark);
}

.btn-secondary {
    background: transparent;
    color: var(--color-primary);
    padding: 0.875rem 2rem;
    border-radius: 4px;
    text-decoration: none;
    display: inline-block;
    font-weight: 500;
    font-size: 0.95rem;
    letter-spacing: -0.01em;
    transition: all var(--transition);
    border: 1px solid var(--color-gray-300);
    cursor: pointer;
}

.btn-secondary:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
}

.btn-outline {
    background: transparent;
    color: var(--color-gray-700);
    padding: 0.875rem 1.5rem;
    border-radius: 4px;
    border: 1px solid var(--color-gray-300);
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition);
    text-decoration: none;
    display: inline-block;
    font-size: 0.95rem;
}

.btn-outline:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
}

/* Hero Section Minimalista */
.hero {
    background: var(--color-white);
    padding: var(--space-3xl) 0 var(--space-2xl);
    text-align: left;
}

.hero-content {
    max-width: 800px;
}

.hero-title {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 700;
    line-height: 1.1;
    letter-spacing: -0.03em;
    color: var(--color-primary);
    margin-bottom: var(--space-lg);
}

.hero-subtitle {
    font-size: clamp(1.125rem, 2vw, 1.25rem);
    font-weight: 400;
    line-height: 1.7;
    color: var(--color-gray-600);
    margin-bottom: var(--space-xl);
    max-width: 600px;
}

.hero-buttons {
    display: flex;
    gap: var(--space-md);
    flex-wrap: wrap;
}

/* Seções */
.section-title {
    font-size: clamp(2rem, 4vw, 2.75rem);
    font-weight: 700;
    letter-spacing: -0.02em;
    color: var(--color-primary);
    margin-bottom: var(--space-md);
    line-height: 1.2;
}

.section-subtitle {
    font-size: 1.125rem;
    font-weight: 400;
    color: var(--color-gray-600);
    margin-bottom: var(--space-xl);
    line-height: 1.7;
    max-width: 700px;
}

/* Features / Cards */
.features {
    padding: var(--space-3xl) 0;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-xl);
    margin-top: var(--space-xl);
}

.feature-card {
    background: var(--color-white);
    padding: var(--space-xl);
    border: 1px solid var(--color-gray-200);
    border-radius: 0;
    transition: all var(--transition);
}

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

.feature-icon {
    display: none;
}

.feature-card h3 {
    font-size: 1.5rem;
    font-weight: 600;
    letter-spacing: -0.02em;
    color: var(--color-primary);
    margin-bottom: var(--space-sm);
    line-height: 1.3;
}

.feature-card p {
    color: var(--color-gray-600);
    line-height: 1.7;
    font-size: 0.95rem;
}

.feature-link {
    color: var(--color-primary);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.95rem;
    transition: color var(--transition);
    display: inline-block;
    margin-top: var(--space-md);
}

.feature-link:hover {
    color: var(--color-primary-dark);
}

/* How It Works */
.how-it-works {
    padding: var(--space-3xl) 0;
    background: var(--color-gray-50);
}

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

.step {
    text-align: left;
}

.step-number {
    width: 48px;
    height: 48px;
    background: var(--color-primary);
    color: var(--color-white);
    border-radius: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: var(--space-md);
}

.step h3 {
    font-size: 1.25rem;
    font-weight: 600;
    letter-spacing: -0.02em;
    color: var(--color-primary);
    margin-bottom: var(--space-xs);
}

.step p {
    color: var(--color-gray-600);
    line-height: 1.7;
    font-size: 0.95rem;
}

/* Footer Minimalista */
.footer {
    background: var(--color-primary);
    color: var(--color-white);
    padding: var(--space-3xl) 0 var(--space-lg);
    margin-top: var(--space-3xl);
}

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

.footer-section h3,
.footer-section h4 {
    font-size: 1rem;
    font-weight: 600;
    letter-spacing: -0.01em;
    margin-bottom: var(--space-md);
    color: var(--color-white);
}

.footer-section p,
.footer-section a {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    display: block;
    margin-bottom: var(--space-xs);
    font-size: 0.95rem;
    transition: color var(--transition);
}

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

.footer-bottom {
    text-align: center;
    padding-top: var(--space-lg);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.9rem;
}

.footer-legal {
    display: flex;
    justify-content: center;
    gap: var(--space-md);
    flex-wrap: wrap;
}

.footer-legal a {
    color: rgba(255, 255, 255, 0.6);
    text-decoration: none;
    transition: color var(--transition);
}

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

/* Cards */
.card {
    background: var(--color-white);
    border: 1px solid var(--color-gray-200);
    border-radius: 0;
    padding: var(--space-xl);
    transition: all var(--transition);
}

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

.card-title {
    font-size: 1.5rem;
    font-weight: 600;
    letter-spacing: -0.02em;
    color: var(--color-primary);
    margin-bottom: var(--space-md);
}

.card-body {
    color: var(--color-gray-600);
    line-height: 1.7;
}

/* Forms Minimalistas */
.form-group {
    margin-bottom: var(--space-md);
}

.form-label {
    display: block;
    margin-bottom: var(--space-xs);
    color: var(--color-gray-800);
    font-weight: 500;
    font-size: 0.95rem;
    letter-spacing: -0.01em;
}

.form-control {
    width: 100%;
    padding: 0.875rem 1rem;
    border: 1px solid var(--color-gray-300);
    border-radius: 4px;
    font-size: 1rem;
    font-family: var(--font-primary);
    transition: all var(--transition);
    background: var(--color-white);
    color: var(--color-gray-900);
}

.form-control:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(44, 62, 80, 0.1);
}

.form-control.error {
    border-color: #d32f2f;
}

textarea.form-control {
    resize: vertical;
    min-height: 120px;
    font-family: var(--font-primary);
}

/* Alerts Minimalistas */
.alert {
    padding: var(--space-md);
    border-radius: 4px;
    margin-bottom: var(--space-md);
    border-left: 3px solid;
}

.alert-success {
    background: #f1f8f4;
    border-color: #4caf50;
    color: #2e7d32;
}

.alert-error {
    background: #ffebee;
    border-color: #f44336;
    color: #c62828;
}

.alert-warning {
    background: #fff8e1;
    border-color: #ff9800;
    color: #e65100;
}

.alert-info {
    background: #e3f2fd;
    border-color: #2196f3;
    color: #1565c0;
}

/* Responsive */
@media (max-width: 768px) {
    .mobile-menu-toggle {
        display: flex;
    }
    
    .nav {
        position: fixed;
        top: 80px;
        left: -100%;
        width: 100%;
        background: var(--color-white);
        flex-direction: column;
        padding: var(--space-lg);
        box-shadow: var(--shadow-lg);
        transition: left var(--transition);
        z-index: 999;
        border-top: 1px solid var(--color-gray-200);
    }
    
    .nav.active {
        left: 0;
    }
    
    .nav-link {
        padding: var(--space-sm);
        width: 100%;
        text-align: left;
        border-bottom: 1px solid var(--color-gray-100);
    }
    
    .hero {
        padding: var(--space-2xl) 0;
        text-align: center;
    }
    
    .hero-content {
        text-align: center;
    }
    
    .hero-buttons {
        justify-content: center;
    }
    
    .features-grid,
    .steps {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .container {
        padding: 0 var(--space-sm);
    }
}

/* Loading Spinner Minimalista */
.spinner {
    border: 2px solid var(--color-gray-200);
    border-top: 2px solid var(--color-primary);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    animation: spin 0.8s linear infinite;
    margin: 0 auto;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Toast Notifications Minimalistas */
.toast {
    position: fixed;
    bottom: 24px;
    right: 24px;
    background: var(--color-gray-900);
    color: var(--color-white);
    padding: var(--space-md) var(--space-lg);
    border-radius: 4px;
    box-shadow: var(--shadow-lg);
    opacity: 0;
    transform: translateY(20px);
    transition: all var(--transition);
    z-index: 10000;
    max-width: 400px;
    font-size: 0.95rem;
}

.toast.show {
    opacity: 1;
    transform: translateY(0);
}

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

.mt-1 { margin-top: var(--space-sm); }
.mt-2 { margin-top: var(--space-md); }
.mt-3 { margin-top: var(--space-lg); }
.mb-1 { margin-bottom: var(--space-sm); }
.mb-2 { margin-bottom: var(--space-md); }
.mb-3 { margin-bottom: var(--space-lg); }