:root {
    --bg: #f7f9fb;
    --text: #111111;
    --card: #ffffff;
    --accent: #0b6cf6;
    --hero-text-color: #ffffff;
    --container: 70%;
    --radius: 10px;
    --gap: 20px;
    --header-height: 70px;
    font-family: Inter, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial;
}

[data-theme="dark"] {
    --bg: #111111;
    --text: #f7f9fb;
    --card: #1a1a1a;
    --accent: #4a9eff;
    --hero-text-color: #ffffff;
    --container: 70%;
    --radius: 10px;
    --gap: 20px;
    --header-height: 70px;
    font-family: Inter, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial
}

[data-theme="high-contrast"] {
    --bg: #000000;
    --text: #ffffff;
    --card: #000000;
    --accent: #ffffff;
    --hero-text-color: #ffffff;
    --container: 70%;
    --radius: 10px;
    --gap: 20px;
    --header-height: 70px;
    font-family: Inter, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial;
}

.theme-toggle {
    position: absolute;
    top: 50%;
    right: 1.4rem;
    transform: translateY(-50%);
    background: transparent;
    color: var(--accent);
    border: none;
    border-radius: 0;
    width: auto;
    height: auto;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: .9rem;
    transition: opacity 0.3s;
}

.theme-toggle:hover {
    opacity: 0.8;
}

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

body {
    background: var(--bg);
    color: var(--text);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
    padding-top: var(--header-height);
}

.container {
    max-width: var(--container);
    margin: 0 auto;
    padding: 1.25rem;
}

.services,
.about,
.contact,
.hero {
    /* responsive spacing: min 2rem, prefers around 3-4rem on larger screens */
    padding-bottom: clamp(1rem, 3vw, 3rem);
    margin-bottom: clamp(.8rem, 3vw, 2rem);
}

.site-header {
    height: var(--header-height);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    display: flex;
    align-items: center; /* vertical centering for header children */
    background: var(--bg);
    border-bottom: 3px solid var(--accent);
    z-index: 1000;
}

.site-header .container {
    height: 100%;
    display: flex;
    align-items: center; /* vertical centering for inner items */
    justify-content: space-between;
    padding: 0 1.25rem;
}

.header-inner {
    display: flex;
    align-items: center;
}

.site-header .logo {
    position: absolute;
    left: 1.4rem;
    height: 64px;
    width: auto;
    align-items: center;
}

.nav {
    list-style: none;
    display: flex;
    gap: 1rem;
}

.nav a {
    text-decoration: none;
    color: var(--accent);
    font-weight: 600;
    padding: .25rem .5rem;
    border-radius: 6px;
    font-size: 1.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

.nav a:hover {
    color: var(--accent);
    opacity: .80;
}

.nav-toggle {
    display: none;
    background: transparent;
    border: none;
    color: var(--accent);
    font-size: 1.5rem;
    cursor: pointer;
    position: absolute;
    right: 3.5rem;
    top: 50%;
    transform: translateY(-50%);
}

.nav-toggle i {
    display: flex;
    align-items: center;
    justify-content: center;
}

section {
    scroll-margin-top: 70px;
}

.hero {
    padding-top: 12rem;
    padding-bottom: 2rem;


    /* Image background */
    background-image: url('../img/hero_img.jpg'); /* Replace with your image path */
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    position: relative; /* Ensures content overlays the image */
}

.hero-inner {
    text-align: center;
    padding: 2rem 1rem;
    border-radius: var(--radius);
}

.hero h1 {
    font-size: clamp(1.6rem, 4vw, 2.6rem);
    color: var(--hero-text-color);
    font-weight: 800;
    margin-bottom: .5rem;
}

.sub {
    margin-bottom: 1rem;
    color: var(--hero-text-color);
    font-weight: 800;
}

.btn {
    border: none;
}

.btn {
    display: inline-block;
    background: var(--accent);
    color: var(--hero-text-color);
    padding: .6rem 1rem;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
}

.btn:hover {
    opacity: .95;
}

.grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--gap);
    margin-top: 1rem;
}

.card {
    background: var(--card);
    padding: 1rem;
    border-radius: var(--radius);
    box-shadow: 0 6px 18px rgba(15, 23, 42, 0.06);
    position: relative;
}

.card h3 {
    margin-bottom: .5rem;
}

.services h2,
.contact h2,
.about h2 {
    border-bottom: 3px solid var(--accent);
    margin: 1rem 0;
}

.about .grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--gap);
    margin-top: 1rem;
}

.about .card {
    background: var(--card);
    padding: 1rem;
    border-radius: var(--radius);
    box-shadow: 0 6px 18px rgba(15, 23, 42, 0.06);
}

.about .card h4 {
    font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, "Roboto Mono", "Segoe UI Mono", "Noto Sans Mono", monospace;
    font-weight: 500;
    display: inline-block;
    color: inherit;
}

.about .card h4::before {
    content: "// ";
    color: var(--accent);
    font-weight: 600;
    margin-right: .35rem;
}

.about .card h4::after {
    content: "// ";
    color: var(--accent);
    font-weight: 600;
    margin-left: .7rem;
}

.about .card p {
    background: var(--card);
    color: var(--text);
    padding: .5rem;
    white-space: pre-wrap;
}

.contact-columns {
    display: flex;
    flex-direction: row;
    gap: 2rem;
}

.contact-column {
    flex: 1;
    padding-top: 1rem;
}

.contact-item {
    display: flex;
    align-items: flex-start;
    margin-bottom: 1rem;
}

.contact-item .span-icon {
    margin-right: 0.5rem;
    flex-shrink: 0;
    color: var(--accent);
}

.contact-text {
    display: flex;
    flex-direction: column;
}

.contact-item p {
    margin: 0;
    line-height: 1.4;
}

/* Footer */
.site-footer {
    padding: 0.7rem 0;
    color: var(--accent);
    font-size: 0.9rem;
    text-align: center;
    border-top: 3px solid var(--accent);
    margin-top: 2rem;
    background: var(--bg);
}

/* Responsive */
@media (max-width: 900px) {
    .nav {
        display: flex;
        flex-direction: column;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--card);
        border-top: 3px solid var(--accent);
        padding: 1rem;
        gap: 0.5rem;
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: all 0.3s ease;
    }

    .nav.open {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }

    .nav-toggle {
        display: block;
        left: 50%;
        top: 50%;
        transform: translate(-50%, -50%);
    }

    .grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }

    .hero-inner {
        padding: 1rem;
    }

    .contact-columns {
        flex-direction: column;
        gap: 1rem;
    }

    .contact-column {
        margin-bottom: 0;
    }

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

    .btn {
        width: 100%;
        text-align: center;
    }
}

@media (max-width: 768px) {
    .nav {
        display: flex;
        flex-direction: column;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--card);
        border-top: 3px solid var(--accent);
        padding: 1rem;
        gap: 0.5rem;
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: all 0.3s ease;
    }

    .nav.open {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }

    .nav-toggle {
        display: block;
        left: 50%;
        top: 50%;
        transform: translate(-50%, -50%);
    }

    .grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }

    .hero-inner {
        padding: 1rem;
    }

    .contact-columns {
        flex-direction: column;
        gap: 1rem;
    }

    .contact-column {
        margin-bottom: 0;
    }

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

    .btn {
        width: 100%;
        text-align: center;
    }
}

@media (max-width: 600px) {
    .nav {
        display: flex;
        flex-direction: column;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--card);
        border-top: 3px solid var(--accent);
        padding: 1rem;
        gap: 0.5rem;
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: all 0.3s ease;
    }

    .nav.open {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }

    .nav-toggle {
        display: block;
        left: 50%;
        top: 50%;
        transform: translate(-50%, -50%);
    }

    .grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }

    .hero-inner {
        padding: 1rem;
    }

    .contact-columns {
        flex-direction: column;
        gap: 1rem;
    }

    .contact-column {
        margin-bottom: 0;
    }

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

    .btn {
        width: 100%;
        text-align: center;
    }
}