:root {
    --primary-color: #667eea;
    --primary-hover: #5568d3;
    --secondary-color: #764ba2;
    --text-color: #2c3e50;
    --whatsapp-color: #25D366;
    --whatsapp-hover: #128C7E;
    --light-bg: #f8f9fa;
    --white: #ffffff;
    --max-width: 1200px;
    --brand-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

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

body {
    font-family: 'Open Sans', sans-serif;
    line-height: 1.6;
    color: var(--text-color);
}

h1, h2, h3, h4, h5, h6 {
    font-family: 'Nunito', sans-serif;
    color: var(--secondary-color);
}

.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 20px;
}

/* Typography */
h1 { font-size: 2.5rem; font-weight: 700; margin-bottom: 1rem; }
h2 { font-size: 2rem; margin-bottom: 1rem; }
p { margin-bottom: 1rem; }

/* Buttons */
.btn {
    display: inline-block;
    padding: 12px 24px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    cursor: pointer;
}

.btn-primary {
    background-color: var(--primary-color);
    color: var(--white);
    border: 2px solid var(--primary-color);
}

.btn-primary:hover {
    background-color: var(--primary-hover);
    border-color: var(--primary-hover);
    transform: translateY(-2px);
}

.btn-white {
    background-color: var(--white);
    color: var(--secondary-color);
    border: 2px solid var(--white);
}

.btn-white:hover {
    background-color: transparent;
    color: var(--white);
    transform: translateY(-2px);
}

.btn-whatsapp {
    background-color: var(--whatsapp-color);
    color: var(--white);
    border: 2px solid var(--whatsapp-color);
}

.btn-whatsapp:hover {
    background-color: var(--whatsapp-hover);
    border-color: var(--whatsapp-hover);
    transform: translateY(-2px);
}

.btn-outline {
    background-color: transparent;
    color: var(--white);
    border: 2px solid var(--white);
}

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

/* Header */
.header {
    background-color: var(--white);
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    height: 70px;
    display: flex;
    align-items: center;
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
}

.logo {
    display: flex;
    align-items: center;
    font-weight: 700;
    font-size: 1.2rem;
    color: var(--primary-color);
}

.logo img {
    height: 40px;
    margin-right: 10px;
}

.nav-menu ul {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-menu a {
    text-decoration: none;
    color: var(--text-color);
    font-weight: 500;
    transition: color 0.3s;
}

.nav-menu a:hover {
    color: var(--secondary-color);
}

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
}

/* Hero Section */
.hero {
    background: var(--brand-gradient);
    color: var(--white);
    padding: 140px 0 80px;
    text-align: center;
}

.hero h1 { 
    color: var(--white);
    font-size: 2rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
}

.hero-brand {
    display: block;
    font-size: 3.5rem;
    font-weight: 800;
    margin-bottom: 0.5rem;
    color: var(--white);
    text-shadow: 0 2px 4px rgba(0,0,0,0.2);
}

.hero-subtitle {
    font-size: 1.25rem;
    max-width: 700px;
    margin: 0 auto 2rem;
    opacity: 0.9;
}

.hero-actions {
    display: flex;
    gap: 1rem;
    justify-content: center;
}

/* Sections */
.section {
    padding: 80px 0;
}

.section-header {
    text-align: center;
    margin-bottom: 3rem;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.lead {
    font-size: 1.2rem;
    color: #666;
}

/* About Section */
.about-section {
    background-color: var(--white);
}

.grid-2 {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: center;
}

.feature-card {
    background: var(--light-bg);
    padding: 1.5rem;
    margin-bottom: 1rem;
    border-radius: 8px;
    border-left: 4px solid var(--secondary-color);
}

/* Method Section */
.method-section {
    background-color: var(--light-bg);
}

.cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.card {
    background: var(--white);
    padding: 2rem;
    border-radius: 12px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.05);
    text-align: center;
    transition: transform 0.3s;
}

.card:hover {
    transform: translateY(-5px);
}

.card-icon {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

/* Values Section */
.values-section {
    background-color: var(--white);
}

.values-list ul {
    list-style: none;
    margin-top: 1rem;
}

.values-list li {
    padding: 0.5rem 0;
    padding-left: 1.5rem;
    position: relative;
}

.values-list li::before {
    content: "✓";
    color: var(--secondary-color);
    position: absolute;
    left: 0;
    font-weight: bold;
}

/* Contact Section */
.contact-section {
    background-color: var(--primary-color);
    color: var(--white);
    text-align: center;
}

.contact-section h2 { color: var(--white); }

.contact-links {
    margin-top: 2rem;
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

/* Footer */
.footer {
    background-color: #1a252f;
    color: #ecf0f1;
    padding: 2rem 0;
    text-align: center;
}

.footer-logo {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
}

.footer-logo img {
    height: 30px;
    filter: brightness(0) invert(1);
}

/* Responsive */
@media (max-width: 768px) {
    .header-container {
        position: relative;
    }

    .nav-menu {
        display: none;
        position: absolute;
        top: 70px;
        left: 0;
        width: 100%;
        background: var(--white);
        box-shadow: 0 4px 6px rgba(0,0,0,0.1);
        padding: 1rem 0;
    }

    .nav-menu.active {
        display: block;
    }

    .nav-menu ul {
        flex-direction: column;
        gap: 1rem;
        text-align: center;
    }

    .login-btn {
        display: none; /* Show inside menu on mobile if needed, or keep adjacent */
    }
    
    .mobile-menu-btn {
        display: block;
        width: 30px;
        height: 20px;
        position: relative;
    }
    
    .mobile-menu-btn span {
        display: block;
        width: 100%;
        height: 3px;
        background-color: var(--primary-color);
        position: absolute;
    }
    
    .mobile-menu-btn span:nth-child(1) { top: 0; }
    .mobile-menu-btn span:nth-child(2) { top: 8px; }
    .mobile-menu-btn span:nth-child(3) { top: 16px; }

    .grid-2 {
        grid-template-columns: 1fr;
    }

    h1 { font-size: 2rem; }
}

.btn-whatsapp {
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.btn-whatsapp svg {
    flex-shrink: 0;
}