/* 1. Basic reset and design variables */
:root {
    --background: #0b1120;
    --surface: #131d30;
    --text: #f5f7ff;
    --muted: #a7b2c8;
    --accent: #54d6c7;
    --border: #26334a;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: Arial, Helvetica, sans-serif;
    background: var(--background);
    color: var(--text);
    line-height: 1.6;
}

a {
    color: inherit;
    text-decoration: none;
}

.container {
    width: min(1120px, 90%);
    margin-inline: auto;
}

/* 2. Navigation */
.site-header {
    border-bottom: 1px solid var(--border);
}

.navbar {
    min-height: 82px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 24px;
}

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    letter-spacing: -1px;
}

.logo span,
.hero h1 span {
    color: var(--accent);
}

.nav-links {
    list-style: none;
    display: flex;
    gap: 28px;
}


/* Smooth navigation link interactions */
.nav-links a {
    color: var(--muted);
    display: inline-block;
    position: relative;
    transition: color 0.25s ease;
}

.nav-links a::after {
    content: "";
    position: absolute;
    left: 0;
    bottom: -5px;
    width: 100%;
    height: 2px;
    background: var(--accent);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.25s ease;
}

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

.nav-links a:hover::after {
    transform: scaleX(1);
}


.nav-button {
    border: 1px solid var(--border);
    padding: 10px 18px;
    border-radius: 8px;
}


/* Professional button interactions */
.button {
    display: inline-block;
    padding: 13px 20px;
    border-radius: 8px;
    font-weight: 700;
    position: relative;
    transition:
        transform 0.25s ease,
        box-shadow 0.25s ease,
        background-color 0.25s ease;
}

.button:hover {
    transform: translateY(-3px);
}

.button-primary:hover {
    background: #79e6da;
    box-shadow: 0 8px 25px rgba(84, 214, 199, 0.22);
}

.button-secondary:hover {
    border-color: var(--accent);
    background: rgba(84, 214, 199, 0.07);
}


/* 4. Hero section */
.hero {
    min-height: 570px;
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    align-items: center;
    gap: 60px;
    padding-block: 80px;
}

.eyebrow {
    color: var(--accent);
    font-size: 0.78rem;
    font-weight: 800;
    letter-spacing: 2px;
    margin-bottom: 18px;
}

.hero h1 {
    font-size: clamp(2.5rem, 5vw, 4.3rem);
    line-height: 1.1;
    letter-spacing: -2px;
    margin-bottom: 24px;
}

.hero-description,
.hero-note {
    color: var(--muted);
}

.hero-description {
    max-width: 520px;
    margin-bottom: 28px;
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
}

.hero-note {
    font-size: 0.85rem;
    margin-top: 26px;
}

/* 5. Hero feature card */
.hero-card {
    background: radial-gradient(circle at top right, #244b58, var(--surface) 65%);
    border: 1px solid var(--border);
    border-radius: 20px;
    padding: 32px;
}

.card-top {
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--muted);
    font-size: 0.72rem;
    letter-spacing: 1px;
}

.status-dot {
    width: 9px;
    height: 9px;
    border-radius: 50%;
    background: var(--accent);
}

.star-icon {
    font-size: 4rem;
    color: var(--accent);
    margin-block: 28px 12px;
}

.hero-card h2 {
    font-size: 1.8rem;
    line-height: 1.25;
    margin-bottom: 14px;
}

.hero-card p {
    color: var(--muted);
    margin-bottom: 22px;
}

.hero-card > a {
    color: var(--accent);
    font-weight: 700;
}

/* 6. Services */
.services {
    padding-block: 70px 90px;
}

.services > h2,
.about h2,
.contact h2 {
    font-size: clamp(1.8rem, 3vw, 2.7rem);
    line-height: 1.2;
    max-width: 680px;
    margin-bottom: 32px;
}

.service-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}


/* Refined service card interactions */
.service-card {
    border: 1px solid var(--border);
    background: var(--surface);
    padding: 26px;
    border-radius: 14px;
    position: relative;
    overflow: hidden;
    transition:
        transform 0.3s ease,
        border-color 0.3s ease,
        box-shadow 0.3s ease,
        background-color 0.3s ease;
}

.service-card:hover {
    transform: translateY(-7px);
    border-color: var(--accent);
    background: #17263a;
    box-shadow: 0 14px 35px rgba(0, 0, 0, 0.2);
}

.service-number {
    color: var(--accent);
    font-weight: 800;
    transition: letter-spacing 0.3s ease;
}

.service-card:hover .service-number {
    letter-spacing: 2px;
}


.service-card h3 {
    margin-block: 18px 10px;
}

.service-card p,
.about > p:last-child,
.contact > p:not(.eyebrow) {
    color: var(--muted);
}

/* 7. About and contact */
.about {
    padding-block: 70px;
    border-top: 1px solid var(--border);
}

.about > p:last-child {
    max-width: 700px;
}

.contact {
    margin-block: 40px 90px;
    padding: 48px;
    border: 1px solid var(--border);
    border-radius: 18px;
    background: var(--surface);
}

.contact > p:not(.eyebrow) {
    margin-bottom: 24px;
}


/* Professional footer */
.site-footer {
    border-top: 1px solid var(--border);
    padding-top: 55px;
    background: #080e1a;
}

.footer-content {
    display: grid;
    grid-template-columns: 1.3fr 0.7fr 1fr;
    gap: 40px;
    padding-bottom: 40px;
}

.footer-brand p {
    max-width: 300px;
    color: var(--muted);
    margin-top: 14px;
}

.footer-links,
.footer-contact {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
}

.footer-links h3,
.footer-contact h3 {
    font-size: 1rem;
    margin-bottom: 5px;
}

.footer-links a,
.footer-contact > a,
.social-links a,
.back-to-top {
    color: var(--muted);
    transition: color 0.25s ease;
}

.footer-links a:hover,
.footer-contact > a:hover,
.social-links a:hover,
.back-to-top:hover {
    color: var(--accent);
}

.social-links {
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
    margin-top: 8px;
}

.footer-bottom {
    border-top: 1px solid var(--border);
    min-height: 70px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
}

.footer-bottom p {
    color: var(--muted);
    font-size: 0.85rem;
}

/* Responsive footer */
@media (max-width: 800px) {
    .footer-content {
        grid-template-columns: 1fr 1fr;
        gap: 32px;
    }

    .footer-brand {
        grid-column: 1 / -1;
    }

    .footer-bottom {
        padding-block: 20px;
        flex-wrap: wrap;
    }
}

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

    .footer-brand {
        grid-column: auto;
    }

    .footer-bottom {
        align-items: flex-start;
        flex-direction: column;
    }
}


/* 9. Mobile and tablet layout */
@media (max-width: 800px) {
    .navbar {
        flex-wrap: wrap;
        padding-block: 18px;
    }

    .nav-links {
        order: 3;
        width: 100%;
        justify-content: center;
        gap: 18px;
        flex-wrap: wrap;
    }

    .hero {
        grid-template-columns: 1fr;
        gap: 36px;
        padding-block: 60px;
    }

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

    .contact {
        padding: 28px;
    }

    .footer-content {
        flex-direction: column;
        align-items: flex-start;
    }
}

@media (max-width: 420px) {
    .nav-button {
        padding: 8px 12px;
    }

    .nav-links {
        gap: 14px;
        font-size: 0.9rem;
    }

    .hero-actions {
        flex-direction: column;
        align-items: stretch;
    }

    .hero-actions .button {
        text-align: center;
    }

    .hero-card {
        padding: 24px;
    }
}



/* Mobile navigation button */
.menu-toggle {
    display: none;
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text);
    font-size: 1.5rem;
    padding: 5px 12px;
    border-radius: 8px;
    cursor: pointer;
}

/* Mobile navigation layout */
@media (max-width: 800px) {
    .navbar {
        position: relative;
    }

    .menu-toggle {
        display: block;
        margin-left: auto;
    }

    .nav-links {
        display: none;
        order: 4;
        width: 100%;
        flex-direction: column;
        align-items: stretch;
        gap: 0;
        padding: 8px 0;
    }

    .nav-links.is-open {
        display: flex;
    }

    .nav-links a {
        display: block;
        padding: 12px 8px;
    }

    .nav-links a:hover {
        background: var(--surface);
        border-radius: 6px;
    }

    .nav-button {
        order: 3;
    }
}



/* Scroll reveal animation */
.reveal {
    opacity: 0;
    transform: translateY(25px);
    transition:
        opacity 0.7s ease,
        transform 0.7s ease;
}

.reveal.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Respect visitors who prefer reduced motion */
@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }

    .reveal {
        opacity: 1;
        transform: none;
        transition: none;
    }

    .button,
    .service-card {
        transition: none;
    }
}



/* Hero feature card interaction */
.hero-card {
    transition:
        transform 0.35s ease,
        border-color 0.35s ease,
        box-shadow 0.35s ease;
}

.hero-card:hover {
    transform: translateY(-5px);
    border-color: rgba(84, 214, 199, 0.55);
    box-shadow: 0 18px 45px rgba(0, 0, 0, 0.18);
}

/* Keyboard accessibility */
.button:focus-visible,
.nav-button:focus-visible,
.nav-links a:focus-visible,
.hero-card > a:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 4px;
}

/* Reduce movement for visitors who prefer it */
@media (prefers-reduced-motion: reduce) {
    .button,
    .service-card,
    .service-number,
    .nav-links a,
    .nav-links a::after,
    .hero-card {
        transition: none;
    }

    .button:hover,
    .service-card:hover,
    .hero-card:hover {
        transform: none;
    }
}



/* Contact section and form */
.contact {
    display: grid;
    grid-template-columns: 0.85fr 1.15fr;
    gap: 48px;
    align-items: start;
}

.contact-intro h2 {
    margin-bottom: 18px;
}

.contact-intro > p:not(.eyebrow) {
    color: var(--muted);
    margin-bottom: 22px;
}

.contact-intro > a {
    color: var(--accent);
    font-weight: 700;
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.form-group label {
    font-size: 0.9rem;
    font-weight: 700;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 13px 14px;
    background: var(--background);
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--text);
    font: inherit;
    transition: border-color 0.25s ease, box-shadow 0.25s ease;
}

.form-group textarea {
    resize: vertical;
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: #8491a8;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(84, 214, 199, 0.12);
}

.contact-form button {
    align-self: flex-start;
    border: none;
    cursor: pointer;
    font: inherit;
    font-weight: 700;
}

.form-feedback {
    font-size: 0.9rem;
    color: var(--accent);
}

@media (max-width: 800px) {
    .contact {
        grid-template-columns: 1fr;
        gap: 32px;
    }
}

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

    .contact-form button {
        width: 100%;
    }
}



/* Developer attribution */
.footer-credit {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: 8px;
    font-size: 0.85rem;
    color: var(--muted);
}

.footer-credit a:not(.back-to-top) {
    color: var(--accent);
    font-weight: 700;
}

.footer-credit a:hover {
    text-decoration: underline;
}

@media (max-width: 800px) {
    .footer-credit {
        align-items: flex-start;
    }
}