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

html {
    scroll-behavior: smooth;
}

body {
    font-family: Arial, Helvetica, sans-serif;
    background: #050b16;
    color: #f5f7fa;
    line-height: 1.6;
}

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

.container {
    width: min(1120px, 92%);
    margin: auto;
}

/* NAVBAR */

.navbar {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: rgba(5, 11, 22, .94);
    border-bottom: 1px solid #172235;
    backdrop-filter: blur(12px);
}

.nav-inner {
    min-height: 76px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    font-size: 30px;
    font-weight: 800;
    letter-spacing: -1px;
}

.logo span {
    color: #28b6f6;
}

nav {
    display: flex;
    gap: 30px;
}

nav a {
    color: #cbd5e1;
    font-size: 15px;
    transition: .2s;
}

nav a:hover {
    color: #35c0ff;
}

/* HERO */

.hero {
    min-height: 720px;
    display: flex;
    align-items: center;
    background:
        radial-gradient(circle at 75% 35%, rgba(31, 168, 235, .14), transparent 35%),
        linear-gradient(135deg, #050b16, #081526);
}

.hero-content {
    padding: 100px 0;
}

.badge {
    display: inline-block;
    border: 1px solid #1e8fc4;
    color: #42c5ff;
    background: rgba(40, 182, 246, .08);
    padding: 9px 15px;
    border-radius: 999px;
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 1px;
    margin-bottom: 30px;
}

.hero h1 {
    font-size: clamp(60px, 10vw, 125px);
    line-height: .9;
    letter-spacing: -6px;
    margin-bottom: 35px;
}

.hero h1 span {
    color: #2ab9f5;
}

.hero p {
    max-width: 680px;
    color: #aebdce;
    font-size: 20px;
    margin-bottom: 35px;
}

.hero-buttons {
    display: flex;
    gap: 15px;
    flex-wrap: wrap;
}

.btn {
    display: inline-block;
    padding: 14px 24px;
    border-radius: 7px;
    font-weight: 700;
    transition: .2s;
}

.btn.primary {
    background: #2bb8f2;
    color: #04101b;
}

.btn.primary:hover {
    transform: translateY(-2px);
}

.btn.secondary {
    border: 1px solid #34445b;
    color: #e8eef5;
}

.btn.secondary:hover {
    border-color: #2bb8f2;
}

/* SECTIONS */

.section {
    padding: 110px 0;
}

.dark-section {
    background: #08111f;
    border-top: 1px solid #152337;
    border-bottom: 1px solid #152337;
}

.section-heading {
    margin-bottom: 55px;
}

.section-heading span {
    color: #2bb8f2;
    font-size: 12px;
    font-weight: 800;
    letter-spacing: 2px;
}

.section-heading h2 {
    font-size: clamp(35px, 5vw, 55px);
    line-height: 1.05;
    margin: 12px 0 18px;
}

.section-heading p {
    color: #9fafc2;
    max-width: 650px;
    font-size: 18px;
}

.section-heading.left {
    margin-bottom: 0;
}

/* LAB CARDS */

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

.lab-card {
    position: relative;
    padding: 30px;
    min-height: 300px;
    border: 1px solid #1a2a3e;
    border-radius: 12px;
    background: #091322;
    transition: .25s;
}

.lab-card:hover {
    transform: translateY(-5px);
    border-color: #219fd5;
}

.lab-number {
    color: #2bb8f2;
    font-size: 13px;
    font-weight: 800;
    margin-bottom: 35px;
}

.lab-card h3 {
    font-size: 23px;
    margin-bottom: 12px;
}

.lab-card p {
    color: #9eafc2;
    font-size: 15px;
    margin-bottom: 25px;
}

.difficulty {
    display: inline-block;
    padding: 5px 9px;
    border-radius: 5px;
    font-size: 11px;
    font-weight: 800;
    text-transform: uppercase;
}

.beginner {
    background: rgba(54, 211, 153, .12);
    color: #50e3aa;
}

.intermediate {
    background: rgba(255, 190, 65, .12);
    color: #ffc34d;
}

.advanced {
    background: rgba(255, 95, 95, .12);
    color: #ff7777;
}

.lab-link {
    position: absolute;
    bottom: 28px;
    right: 28px;
    color: #2bb8f2;
    font-size: 13px;
    font-weight: 700;
}

/* ABOUT */

.split {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: start;
}

.about-text {
    color: #aebdce;
    font-size: 17px;
}

.about-text p {
    margin-bottom: 22px;
}

/* SERVICES */

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

.services > div {
    padding: 30px;
    border-top: 2px solid #2bb8f2;
    background: #091322;
}

.services h3 {
    margin-bottom: 12px;
}

.services p {
    color: #9eafc2;
}

/* CTA */

.cta {
    margin-top: 80px;
    padding: 55px;
    text-align: center;
    border: 1px solid #1d3a50;
    border-radius: 14px;
    background:
        radial-gradient(circle, rgba(43, 184, 242, .12), transparent 60%),
        #081321;
}

.cta h2 {
    font-size: 40px;
    margin-bottom: 10px;
}

.cta p {
    color: #aebdce;
    margin-bottom: 25px;
}

/* FOOTER */

footer {
    background: #030810;
    border-top: 1px solid #172235;
    padding: 35px 0;
}

.footer-inner {
    display: flex;
    justify-content: space-between;
    gap: 20px;
    color: #8393a7;
    font-size: 14px;
}

.footer-inner strong {
    color: #fff;
    font-size: 18px;
}

.footer-inner a {
    color: #2bb8f2;
}

/* MOBILE */

@media (max-width: 850px) {

    nav {
        gap: 14px;
    }

    nav a {
        font-size: 13px;
    }

    .hero {
        min-height: 650px;
    }

    .hero h1 {
        letter-spacing: -3px;
    }

    .lab-grid,
    .services,
    .split {
        grid-template-columns: 1fr;
    }

    .split {
        gap: 35px;
    }

    .footer-inner {
        flex-direction: column;
    }
}

@media (max-width: 550px) {

    .nav-inner {
        flex-direction: column;
        justify-content: center;
        gap: 10px;
        padding: 15px 0;
    }

    nav {
        flex-wrap: wrap;
        justify-content: center;
    }

    .hero p {
        font-size: 17px;
    }

    .section {
        padding: 75px 0;
    }

    .cta {
        padding: 35px 20px;
    }
}