/* Modern, Mobile-First Local Service Website CSS */
:root {
    --primary: #0284c7;
    --primary-dark: #0369a1;
    --accent: #f59e0b;
    --text-dark: #1e293b;
    --text-muted: #64748b;
    --bg-light: #f8fafc;
    --white: #ffffff;
    --border: #e2e8f0;
    --transition: all 0.3s ease;
}

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

body {
    font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    color: var(--text-dark);
    line-height: 1.6;
    background-color: var(--white);
    -webkit-font-smoothing: antialiased;
}

/* Header & Navigation */
header {
    background: var(--white);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.top-bar {
    background: var(--text-dark);
    color: var(--white);
    font-size: 0.875rem;
    padding: 0.5rem 1rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
}

.top-bar a {
    color: var(--white);
    text-decoration: none;
}

.main-nav {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-weight: 700;
    font-size: 1.25rem;
    color: var(--primary-dark);
    text-decoration: none;
}

.nav-links {
    display: flex;
    gap: 1.5rem;
    list-style: none;
    align-items: center;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-dark);
    font-weight: 500;
    transition: var(--transition);
}

.nav-links a:hover {
    color: var(--primary);
}

.btn-header-call {
    background-color: var(--primary);
    color: var(--white);
    padding: 0.5rem 1rem;
    border-radius: 4px;
    text-decoration: none;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    transition: var(--transition);
}

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

/* Hero Section */
.hero {
    background: linear-gradient(rgba(15, 23, 42, 0.75), rgba(15, 23, 42, 0.75)), url('../images/hero-water-heater.jpg') center/cover no-repeat;
    color: var(--white);
    padding: 5rem 1rem;
    text-align: center;
}

.hero-container {
    max-width: 800px;
    margin: 0 auto;
}

.hero h1 {
    font-size: clamp(2rem, 4vw, 3rem);
    margin-bottom: 1rem;
    font-weight: 800;
}

.hero p {
    font-size: 1.125rem;
    margin-bottom: 2rem;
    color: #e2e8f0;
}

.hero-cta-group {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

.btn-primary {
    background-color: var(--accent);
    color: var(--text-dark);
    padding: 0.875rem 1.75rem;
    font-size: 1.1rem;
    font-weight: 700;
    border-radius: 6px;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    transition: var(--transition);
}

.btn-primary:hover {
    background-color: #d97706;
    color: var(--white);
}

.btn-secondary {
    background-color: transparent;
    color: var(--white);
    border: 2px solid var(--white);
    padding: 0.875rem 1.75rem;
    font-size: 1.1rem;
    font-weight: 600;
    border-radius: 6px;
    text-decoration: none;
    transition: var(--transition);
}

.btn-secondary:hover {
    background-color: rgba(255,255,255,0.1);
}

/* Container & Sections */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 4rem 1rem;
}

.section-title {
    text-align: center;
    font-size: 2rem;
    margin-bottom: 3rem;
    color: var(--text-dark);
    position: relative;
}

.grid-3 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.card {
    background: var(--bg-light);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 2rem;
    transition: var(--transition);
}

.card:hover {
    transform: translateY(-4px);
    box-shadow: 0 10px 15px -3px rgba(0,0,0,0.05);
}

.card h3 {
    margin-bottom: 1rem;
    color: var(--primary-dark);
}

/* Trust / Info Bar */
.trust-bar {
    background-color: var(--bg-light);
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
    padding: 2rem 1rem;
}

.trust-grid {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    text-align: center;
}

.trust-item h4 {
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
    color: var(--text-dark);
}

.trust-item p {
    color: var(--text-muted);
    font-size: 0.95rem;
}

/* Mobile Sticky Call CTA */
.mobile-sticky-cta {
    display: none;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: var(--text-dark);
    padding: 0.75rem 1rem;
    z-index: 1100;
    box-shadow: 0 -4px 10px rgba(0,0,0,0.1);
    text-align: center;
}

.mobile-sticky-cta a {
    background: var(--primary);
    color: var(--white);
    display: block;
    padding: 0.75rem;
    border-radius: 4px;
    text-decoration: none;
    font-weight: 700;
    font-size: 1.1rem;
}

@media (max-width: 768px) {
    .mobile-sticky-cta {
        display: block;
    }
    body {
        padding-bottom: 60px;
    }
    .nav-links {
        display: none;
    }
}

/* Footer */
footer {
    background: #0f172a;
    color: #94a3b8;
    padding: 3rem 1rem 1.5rem;
}

.footer-container {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-col h4 {
    color: var(--white);
    margin-bottom: 1rem;
    font-size: 1.1rem;
}

.footer-col ul {
    list-style: none;
}

.footer-col ul li {
    margin-bottom: 0.5rem;
}

.footer-col ul li a {
    color: #94a3b8;
    text-decoration: none;
    transition: var(--transition);
}

.footer-col ul li a:hover {
    color: var(--white);
}

.footer-bottom {
    max-width: 1200px;
    margin: 0 auto;
    border-top: 1px solid #1e293b;
    padding-top: 1.5rem;
    text-align: center;
    font-size: 0.875rem;
}