:root {
    --primary: #0056b3;
    --primary-dark: #003d80;
    --accent: #00d4ff;
    --bg-light: #f8f9fa;
    --text-dark: #333333;
    --text-muted: #666666;
    --white: #ffffff;
    --glass: rgba(255, 255, 255, 0.8);
    --shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    --border-radius: 12px;
    --transition: all 0.3s ease;
}

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

body {
    font-family: 'Inter', sans-serif;
    color: var(--text-dark);
    line-height: 1.6;
    overflow-x: hidden;
}

/* Typography */
h1, h2, h3 {
    font-weight: 800;
    line-height: 1.2;
}

h1 { font-size: 3rem; margin-bottom: 1.5rem; }
h2 { font-size: 2.2rem; margin-bottom: 1.2rem; }
p { margin-bottom: 1.2rem; }

/* Layout */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

section {
    padding: 80px 0;
}

/* Header & Nav */
header {
    background: var(--white);
    padding: 15px 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: var(--shadow);
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
}

.header-logo {
    height: 80px;
    width: auto;
    display: block;
    transition: var(--transition);
}

.logo:hover .header-logo {
    transform: scale(1.05);
}

.header-contacts {
    display: flex;
    align-items: center;
    gap: 20px;
}

.cta-phone {
    color: var(--text-dark);
    text-decoration: none;
    font-weight: 700;
    transition: var(--transition);
}

.cta-phone:hover {
    color: var(--primary);
}

.cta-whatsapp {
    background: #25d366;
    color: white;
    padding: 12px 25px;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 10px;
    transition: var(--transition);
}

.cta-whatsapp:hover {
    background: #128c7e;
    transform: translateY(-2px);
    box-shadow: 0 4px 10px rgba(37, 211, 102, 0.3);
}
@media (max-width: 768px) {
    .header-contacts {
        flex-direction: column;
        gap: 10px;
        width: 100%;
    }
}

/* Hero Section */
.hero {
    background: linear-gradient(rgba(0, 0, 0, 0.5), rgba(0, 0, 0, 0.5)), url('purificador_de_agua_londrina_hero.png');
    background-size: cover;
    background-position: center;
    height: 80vh;
    display: flex;
    align-items: center;
    color: var(--white);
    text-align: center;
}

.hero-content {
    max-width: 900px;
    margin: 0 auto;
}

.hero h1 {
    font-size: 3.5rem;
    text-shadow: 2px 2px 10px rgba(0,0,0,0.5);
}

.hero p {
    font-size: 1.4rem;
    margin-bottom: 2.5rem;
}

/* Introduction Section */
.intro {
    background: var(--white);
    border-bottom: 1px solid #eee;
}

.intro-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
    align-items: center;
}

/* Cities & Neighborhoods Hub */
.locations {
    background: var(--bg-light);
}

.city-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 20px;
    margin-top: 40px;
}

.location-card {
    background: var(--white);
    padding: 20px;
    border-radius: var(--border-radius);
    text-align: center;
    transition: var(--transition);
    border: 1px solid transparent;
    text-decoration: none;
    color: var(--text-dark);
    font-weight: 600;
}

.location-card:hover {
    border-color: var(--primary);
    transform: translateY(-5px);
    box-shadow: var(--shadow);
    color: var(--primary);
}

/* Features/Why Us */
.features {
    background: var(--white);
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.feature-item {
    padding: 30px;
    border-radius: var(--border-radius);
    background: var(--bg-light);
    text-align: center;
}

.feature-item i {
    font-size: 2.5rem;
    color: var(--primary);
    margin-bottom: 20px;
    display: block;
}

/* SEO Content Blocks */
.seo-text {
    max-width: 900px;
    margin: 0 auto;
    font-size: 1.1rem;
    color: var(--text-muted);
}

.seo-text h2, .seo-text h3 {
    color: var(--text-dark);
    margin-top: 40px;
}

/* Footer */
footer {
    background: #111;
    color: var(--white);
    padding: 60px 0 20px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1.5fr;
    gap: 40px;
    margin-bottom: 40px;
}

.footer-grid a {
    transition: var(--transition);
}

.footer-grid a:hover {
    color: var(--accent) !important;
    padding-left: 5px;
}

.footer-bottom {
    border-top: 1px solid #333;
    padding-top: 20px;
    text-align: center;
    font-size: 0.9rem;
    color: #888;
}

/* Mobile Responsive */
@media (max-width: 768px) {
    section {
        padding: 50px 0;
    }

    h1 { 
        font-size: 2.2rem; 
        line-height: 1.1;
    }

    h2 { 
        font-size: 1.8rem; 
    }

    .nav-container {
        flex-direction: column;
        gap: 15px;
        text-align: center;
    }

    .hero { 
        height: auto; 
        padding: 80px 0; 
    }

    .hero h1 {
        font-size: 2.5rem;
    }

    .hero p {
        font-size: 1.1rem;
        margin-bottom: 30px;
    }

    .intro-grid { 
        grid-template-columns: 1fr; 
        gap: 30px;
    }

    .city-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 10px;
    }

    .location-card {
        padding: 15px 10px;
        font-size: 0.9rem;
    }

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

    .footer-grid { 
        grid-template-columns: 1fr; 
        gap: 30px;
        text-align: center;
    }

    .cta-whatsapp {
        width: 100%;
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .city-grid {
        grid-template-columns: 1fr;
    }

    .hero h1 {
        font-size: 2rem;
    }
}