:root {
    /* Colour palette inspired by the Data Centre Solutions website */
    --dark-bg: #0d1723;      /* deep navy background for headers and hero overlay */
    --green: #14944f;        /* primary green accent */
    --green-dark: #076432;   /* darker green for hover states */
    --blue: #0d81c4;         /* secondary blue accent */
    --purple: #8b6bbd;       /* tertiary purple accent */
    --orange: #d46b30;       /* quaternary orange accent */
    --light-bg: #f8f9fa;     /* light grey background for body */
    --section-bg: #ffffff;   /* white background for sections */
    --text-light: #ffffff;   /* light text colour */
    --text-dark: #2d3a4a;    /* dark text colour */
    --primary-font: 'Open Sans', sans-serif;
    --heading-font: 'Montserrat', sans-serif;
}

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

body {
    font-family: var(--primary-font);
    color: var(--text-dark);
    background-color: var(--light-bg);
    line-height: 1.6;
}

.container {
    width: 90%;
    max-width: 1100px;
    margin: 0 auto;
    padding: 2rem 0;
}

/* Navigation */
header {
    background-color: var(--dark-bg);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 100;
}

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

/* Logo text styling (replace image) */
.logo {
    font-family: var(--heading-font);
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--text-light);
    text-decoration: none;
    margin: 0.5rem 0;
    display: inline-block;
}
/* Remove default link hover underline */
.logo:hover {
    color: var(--green);
}

nav ul {
    list-style: none;
    display: flex;
    gap: 1.5rem;
}

nav ul li a {
    text-decoration: none;
    color: var(--text-light);
    font-weight: 600;
    font-family: var(--heading-font);
}

nav ul li a:hover {
    color: var(--green);
}

/* Hero section */
#hero {
    display: flex;
    align-items: center;
    justify-content: center;
    height: 80vh;
    text-align: center;
    color: var(--text-light);
    padding-top: 6rem; /* offset for fixed header */
    /* Hero uses a datacenter image with a dark overlay */
    background: linear-gradient(rgba(13, 23, 35, 0.7), rgba(13, 23, 35, 0.7)), url('images/datacenter.jpg');
    background-size: cover;
    background-position: center;
}

.hero-content h1 {
    font-family: var(--heading-font);
    font-size: 3rem;
    letter-spacing: 1px;
    margin-bottom: 1rem;
}

.hero-content .tagline {
    font-family: var(--heading-font);
    font-size: 1.2rem;
    margin-bottom: 2rem;
    font-weight: 600;
}

/* Subtagline beneath the main tagline in hero */
.hero-content .subtagline {
    font-family: var(--primary-font);
    font-size: 1rem;
    margin-bottom: 2rem;
    color: var(--green);
}

.btn {
    display: inline-block;
    padding: 0.75rem 2rem;
    background-color: var(--green);
    color: var(--text-light);
    text-decoration: none;
    border-radius: 4px;
    font-weight: 600;
    transition: background-color 0.3s ease;
}

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

/* About section */
#about {
    background-color: var(--section-bg);
    padding-top: 6rem; /* extra spacing relative to hero */
}

#about h2 {
    font-family: var(--heading-font);
    margin-bottom: 1rem;
}

#about p {
    max-width: 800px;
}

/* Services section */
#services {
    background-color: var(--light-bg);
    padding-top: 6rem;
    padding-bottom: 6rem;
}

#services h2 {
    font-family: var(--heading-font);
    text-align: center;
    margin-bottom: 2rem;
}

.service-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 2rem;
}

.service-card {
    background-color: var(--section-bg);
    border-radius: 8px;
    padding: 2rem;
    text-align: center;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.1);
}

.service-card i {
    font-size: 2.5rem;
    color: var(--green);
    margin-bottom: 1rem;
}

.service-card h3 {
    font-family: var(--heading-font);
    margin-bottom: 0.5rem;
}

.service-card p {
    font-size: 0.95rem;
}

/* Contact section */
#contact {
    background-color: var(--section-bg);
    padding-top: 6rem;
    padding-bottom: 6rem;
}

#contact h2 {
    font-family: var(--heading-font);
    text-align: center;
    margin-bottom: 1.5rem;
}

.contact-details {
    margin-bottom: 2rem;
    text-align: center;
    font-size: 1rem;
}

.contact-details p {
    margin-bottom: 0.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.contact-details i {
    color: var(--green);
    font-size: 1.2rem;
}

.contact-details a {
    color: var(--green);
    text-decoration: none;
}

.contact-details a:hover {
    text-decoration: underline;
}

.contact-action {
    text-align: center;
}

/* Footer */
footer {
    background-color: var(--dark-bg);
    color: var(--text-light);
    text-align: center;
    padding: 1.5rem 0;
}

footer p {
    font-size: 0.9rem;
}

@media (max-width: 768px) {
    .hero-content h1 {
        font-size: 2.3rem;
    }
}

/* Service card colour variations */
.service-card.card-green {
    border-top: 4px solid var(--green);
}
.service-card.card-green i,
.service-card.card-green h3 {
    color: var(--green);
}

.service-card.card-blue {
    border-top: 4px solid var(--blue);
}
.service-card.card-blue i,
.service-card.card-blue h3 {
    color: var(--blue);
}

.service-card.card-purple {
    border-top: 4px solid var(--purple);
}
.service-card.card-purple i,
.service-card.card-purple h3 {
    color: var(--purple);
}

.service-card.card-orange {
    border-top: 4px solid var(--orange);
}
.service-card.card-orange i,
.service-card.card-orange h3 {
    color: var(--orange);
}