/* 
    NRES Design System 
    Color Palette:
    - Primary Navy Blue: #0A192F
    - Secondary/Forest Green: #2D6A4F
    - Jacaranda Plum: #6a2b5e
    - Background: #F8F9FA
    - Text: #333333, #ffffff
*/

:root {
    --navy-primary: #0A192F;
    --navy-light: #172A45;
    --green-primary: #2D6A4F;
    --green-light: #40916C;
    --plum-primary: #6A2B5E;
    --plum-light: #8A3A7C;
    --plum-glow: rgba(106, 43, 94, 0.4);
    
    --bg-main: #F8F9FA;
    --bg-card: #FFFFFF;
    --text-primary: #333333;
    --text-secondary: #555555;
    --white: #FFFFFF;
    --border-light: #E0E0E0;

    /* Semantic Card Accents */
    --residential-color: var(--navy-primary);
    --commercial-color: var(--plum-primary);
    --agricultural-color: var(--green-primary);

    /* Typography - Strict System Fonts Only */
    --font-stack: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol";
    
    /* Layout */
    --max-width: 1200px;
    --border-radius: 8px;
    --box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05), 0 10px 15px rgba(0, 0, 0, 0.1);
    --box-shadow-hover: 0 10px 20px rgba(0, 0, 0, 0.1), 0 15px 30px rgba(0, 0, 0, 0.15);
    --transition-speed: 0.3s;
}

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

body {
    font-family: var(--font-stack);
    background-color: var(--bg-main);
    color: var(--text-primary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, h5, h6 {
    color: var(--navy-primary);
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 1rem;
}

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

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

.container {
    width: 100%;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 1.5rem;
}

.section {
    padding: 5rem 0;
}

.bg-light {
    background-color: var(--white);
}

/* --- Buttons --- */
.btn {
    display: inline-block;
    padding: 0.8rem 1.5rem;
    border-radius: var(--border-radius);
    font-weight: 600;
    text-decoration: none;
    transition: all var(--transition-speed) ease;
    cursor: pointer;
    border: none;
    text-align: center;
}

.btn-sm {
    padding: 0.6rem 1.2rem;
    font-size: 0.9rem;
}

.btn-lg {
    padding: 1rem 2rem;
    font-size: 1.1rem;
}

.btn-full {
    display: block;
    width: 100%;
}

.btn-primary {
    background-color: var(--navy-primary);
    color: var(--white);
}
.btn-primary:hover {
    background-color: var(--navy-light);
    color: var(--white);
    transform: translateY(-2px);
    box-shadow: var(--box-shadow);
}

.btn-plum {
    background-color: var(--plum-primary);
    color: var(--white);
}
.btn-plum:hover {
    background-color: var(--plum-light);
    color: var(--white);
    transform: translateY(-2px);
    box-shadow: 0 4px 15px var(--plum-glow);
}

/* --- Header / Navigation --- */
.header {
    background-color: var(--white);
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 80px;
}

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

.main-nav {
    display: flex;
    align-items: center;
}

.nav-list {
    display: flex;
    list-style: none;
    gap: 2rem;
    align-items: center;
}

.nav-link {
    font-weight: 500;
    color: var(--navy-light);
}

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

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
}

.hamburger {
    display: block;
    width: 25px;
    height: 3px;
    background-color: var(--navy-primary);
    position: relative;
}
.hamburger::before, .hamburger::after {
    content: '';
    position: absolute;
    width: 25px;
    height: 3px;
    background-color: var(--navy-primary);
    left: 0;
}
.hamburger::before { top: -8px; }
.hamburger::after { top: 8px; }

/* --- Hero Section --- */
.hero {
    position: relative;
    background-color: var(--navy-primary);
    color: var(--white);
    padding: 8rem 0;
    text-align: center;
    overflow: hidden;
}

/* Subtle gradient background instead of heavy image while staying premium */
.hero::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background: linear-gradient(135deg, var(--navy-primary) 0%, #16243d 50%, var(--plum-primary) 100%);
    opacity: 0.8;
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 800px;
}

.hero-title {
    color: var(--white);
    font-size: 3.5rem;
    margin-bottom: 1.5rem;
}

.hero-highlight {
    color: #e5b3db; /* Light plum accent */
}

.hero-subtitle {
    font-size: 1.2rem;
    color: #cbd5e1;
    margin-bottom: 2.5rem;
}

/* --- Services Grid --- */
.section-header {
    text-align: center;
    margin-bottom: 4rem;
}
.section-header h2 {
    font-size: 2.5rem;
}
.section-header p {
    color: var(--text-secondary);
    font-size: 1.1rem;
}

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

.service-card {
    background: var(--bg-card);
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--box-shadow);
    transition: transform var(--transition-speed), box-shadow var(--transition-speed);
    position: relative;
    display: flex;
    flex-direction: column;
}

.service-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--box-shadow-hover);
}

.card-image-placeholder {
    height: 200px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 4rem;
}

/* Distinct card visuals using brand colors */
.residential-bg { background: linear-gradient(to bottom right, var(--navy-light), var(--navy-primary)); }
.commercial-bg { background: linear-gradient(to bottom right, var(--plum-light), var(--plum-primary)); }
.agricultural-bg { background: linear-gradient(to bottom right, var(--green-light), var(--green-primary)); }

.card-content {
    padding: 2rem;
    flex-grow: 1;
    display: flex;
    flex-direction: column;
}
.card-content p {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    flex-grow: 1;
}

.card-accent {
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 4px;
}
.residential-accent { background-color: var(--navy-light); }
.commercial-accent { background-color: var(--plum-primary); }
.agricultural-accent { background-color: var(--green-primary); }

.card-link {
    font-weight: 600;
}
.agricultural-link { color: var(--green-primary); }
.agricultural-link:hover { color: var(--green-light); }

/* --- About Section --- */
.about-container {
    max-width: 800px;
    text-align: center;
}
.about-title {
    color: var(--plum-primary);
    font-size: 2.2rem;
}
.about-content p {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: 1rem;
}

/* --- Footer --- */
.footer {
    background-color: var(--navy-primary);
    color: var(--white);
    padding: 3rem 0;
}
.footer h3 {
    color: var(--white);
}
.footer p {
    color: #cbd5e1;
}
.footer-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: 1.5rem;
}

/* --- Responsive Adjustments --- */
@media (max-width: 768px) {
    .nav-list {
        display: none; /* Hide default nav on mobile */
        flex-direction: column;
        position: absolute;
        top: 80px;
        left: 0;
        right: 0;
        background-color: var(--white);
        padding: 2rem;
        box-shadow: 0 10px 10px rgba(0,0,0,0.05);
    }
    .nav-list.active {
        display: flex;
    }
    .mobile-menu-btn {
        display: block;
    }
    .hero-title {
        font-size: 2.5rem;
    }
}

/* --- Form Styles --- */
.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    font-weight: 500;
    margin-bottom: 0.5rem;
    color: var(--navy-primary);
}

.form-control {
    width: 100%;
    padding: 0.8rem 1rem;
    border: 1px solid var(--border-light);
    border-radius: 4px;
    font-family: var(--font-stack);
    font-size: 1rem;
    transition: border-color var(--transition-speed), box-shadow var(--transition-speed);
    background-color: #fafafa;
}

.form-control:focus {
    outline: none;
    border-color: var(--plum-primary);
    box-shadow: 0 0 0 3px var(--plum-glow);
    background-color: var(--white);
}

.form-row {
    display: flex;
    gap: 1.5rem;
    flex-wrap: wrap;
}

@media (max-width: 600px) {
    .form-row {
        flex-direction: column;
        gap: 0;
    }
    .contact-container {
        padding: 2rem !important;
    }
}