:root {
    --blue: #2563eb;
    --deep-blue: #1e3a8a;
    --sky-blue: #38bdf8;
    --red: #dc2626;
    --purple: #7c3aed;

    --bg: #050505;
    --surface: rgba(17, 24, 39, 0.65);
    --surface-hover: rgba(30, 41, 59, 0.8);

    --text: #ffffff;
    --text-muted: #9ca3af;

    --border: rgba(255,255,255,0.08);
    --shadow: 0 10px 40px rgba(0,0,0,0.4);

    --radius: 20px;
    --transition: 0.3s ease;
}

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

html {
    scroll-behavior: smooth;
}

body {
    background: var(--bg);
    color: var(--text);
    font-family: Inter, Arial, sans-serif;
    overflow-x: hidden;
    position: relative;
}

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

ul {
    list-style: none;
}

img {
    max-width: 100%;
}

/* BACKGROUND EFFECTS */

.bg-grid {
    position: fixed;
    inset: 0;
    z-index: -3;

    background-image:
        linear-gradient(rgba(255,255,255,.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,.03) 1px, transparent 1px);

    background-size: 50px 50px;
}

.bg-glow {
    position: fixed;
    border-radius: 50%;
    filter: blur(120px);
    z-index: -2;
}

.glow-1 {
    width: 500px;
    height: 500px;
    background: rgba(37,99,235,.25);
    top: -100px;
    left: -100px;
}

.glow-2 {
    width: 450px;
    height: 450px;
    background: rgba(124,58,237,.20);
    top: 200px;
    right: -150px;
}

/* NAVBAR */

header {
    position: sticky;
    top: 0;
    z-index: 999;
    padding: 1rem 2rem;
}

.navbar {
    max-width: 1400px;
    margin: auto;

    display: flex;
    align-items: center;
    justify-content: space-between;

    background: rgba(10,10,10,.75);
    backdrop-filter: blur(18px);

    border: 1px solid var(--border);
    border-radius: 999px;

    padding: 1rem 1.5rem;

    opacity: 1;

    transition:
        transform .35s ease,
        opacity .35s ease,
        background .35s ease;
}

.navbar-hidden {
    transform: translateY(-150%) scale(.95);
    opacity: 0;
}

.logo {
    font-size: 1.4rem;
    font-weight: 800;
    letter-spacing: 2px;

    background: linear-gradient(
        90deg,
        var(--sky-blue),
        var(--blue),
        var(--purple)
    );

    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.nav-links {
    display: flex;
    gap: 2rem;
}

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

.nav-links a:hover {
    color: white;
}

.nav-btn {
    background: linear-gradient(
        135deg,
        var(--blue),
        var(--purple)
    );

    padding: .9rem 1.4rem;
    border-radius: 999px;
    font-weight: 600;

    transition: var(--transition);
}

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

/* HERO */

.hero {
    min-height: calc(100vh - 120px);

    max-width: 1200px;
    margin: auto;

    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;

    text-align: center;

    padding: 8rem 2rem;
}

.hero-badge {
    padding: .6rem 1rem;

    border: 1px solid rgba(56,189,248,.25);

    background: rgba(56,189,248,.08);

    border-radius: 999px;

    color: var(--sky-blue);

    margin-bottom: 2rem;
}

.hero h1 {
    font-size: clamp(3rem, 8vw, 6rem);
    line-height: 1.05;
    max-width: 1100px;
}

.hero h1 span {
    display: block;

    background: linear-gradient(
        90deg,
        var(--sky-blue),
        var(--blue),
        var(--purple)
    );

    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero p {
    max-width: 700px;

    color: var(--text-muted);

    margin-top: 2rem;

    font-size: 1.2rem;
    line-height: 1.8;
}

.hero-buttons {
    display: flex;
    gap: 1rem;

    margin-top: 3rem;
}

/* BUTTONS */

.primary-btn,
.secondary-btn {
    padding: 1rem 1.8rem;
    border-radius: 999px;

    font-weight: 600;

    transition: var(--transition);
}

.primary-btn {
    background: linear-gradient(
        135deg,
        var(--blue),
        var(--purple)
    );
}

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

.secondary-btn {
    border: 1px solid var(--border);
    background: rgba(255,255,255,.03);
}

.secondary-btn:hover {
    background: rgba(255,255,255,.06);
}

/* SECTIONS */

.preview-section {
    max-width: 1300px;
    margin: auto;
    padding: 8rem 2rem;
}

.section-heading {
    margin-bottom: 4rem;
}

.section-heading span {
    color: var(--sky-blue);
    letter-spacing: 3px;
    font-size: .85rem;
}

.section-heading h2 {
    font-size: clamp(2rem, 5vw, 4rem);
    margin-top: 1rem;
}

/* CARDS */

.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit,minmax(280px,1fr));
    gap: 2rem;
}

.glass-card {
    background: var(--surface);

    backdrop-filter: blur(18px);

    border: 1px solid var(--border);

    border-radius: var(--radius);

    padding: 2rem;

    transition: var(--transition);
}

.glass-card:hover {
    transform: translateY(-10px);

    background: var(--surface-hover);

    border-color: rgba(37,99,235,.4);
}

.glass-card h3 {
    margin-bottom: 1rem;
    font-size: 1.4rem;
}

.glass-card p {
    color: var(--text-muted);
    line-height: 1.7;
}

/* STATS */

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit,minmax(220px,1fr));
    gap: 2rem;
}

.stat {
    text-align: center;

    background: var(--surface);

    border: 1px solid var(--border);

    border-radius: var(--radius);

    padding: 2rem;
}

.stat h3 {
    font-size: 2rem;
    color: var(--sky-blue);
}

.stat p {
    margin-top: .75rem;
    color: var(--text-muted);
}

/* PROJECTS */

.project-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit,minmax(320px,1fr));
    gap: 2rem;
}

.project-card {
    overflow: hidden;

    background: var(--surface);

    border: 1px solid var(--border);

    border-radius: var(--radius);

    transition: var(--transition);
}

.project-card:hover {
    transform: translateY(-10px);
}

.project-image {
    height: 240px;

    background:
        linear-gradient(
            135deg,
            var(--blue),
            var(--purple)
        );

    position: relative;
}

.project-image::before {
    content: "";

    position: absolute;
    inset: 0;

    background:
        repeating-linear-gradient(
            45deg,
            transparent,
            transparent 15px,
            rgba(255,255,255,.04) 15px,
            rgba(255,255,255,.04) 30px
        );
}

.project-card h3 {
    padding: 1.5rem;
}

/* LINKS */

.section-link {
    display: inline-block;

    margin-top: 3rem;

    color: var(--sky-blue);

    font-weight: 600;
}

/* CTA */

.cta {
    max-width: 1100px;
    margin: 4rem auto;

    text-align: center;

    padding: 5rem 2rem;

    border-radius: 32px;

    border: 1px solid var(--border);

    background:
        linear-gradient(
            135deg,
            rgba(37,99,235,.15),
            rgba(124,58,237,.15)
        );
}

.cta h2 {
    font-size: clamp(2rem,5vw,4rem);
}

.cta p {
    max-width: 700px;

    margin: 1.5rem auto 2rem;

    color: var(--text-muted);
}

/* FOOTER */

footer {
    margin-top: 8rem;
    border-top: 1px solid var(--border);
    background: rgba(255,255,255,.015);
}

.footer-main {
    max-width: 1400px;
    margin: auto;

    padding: 4rem 2rem;

    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 3rem;
}

.footer-column h3,
.footer-column h4 {
    color: white;
    margin-bottom: 1.25rem;
}

.footer-column p {
    color: var(--text-muted);
    line-height: 1.8;
}

.footer-column a {
    display: block;
    width: fit-content;

    margin-bottom: .8rem;

    color: var(--text-muted);

    transition: .25s ease;
}

.footer-column a:hover {
    color: white;
}

.footer-contact-btn {
    display: inline-block !important;

    margin-top: 1.5rem;

    padding: .9rem 1.5rem;

    border-radius: 999px;

    background: linear-gradient(
        135deg,
        var(--blue),
        var(--purple)
    );

    color: white !important;
    font-weight: 600;

    transition: .25s ease;
}

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

.social-links {
    display: flex;
    gap: .75rem;
    margin-top: .5rem;
}

.social-links a {
    width: 44px;
    height: 44px;

    display: flex;
    align-items: center;
    justify-content: center;

    margin: 0;

    border-radius: 12px;

    background: rgba(255,255,255,.05);
    border: 1px solid var(--border);

    transition: .25s ease;
}

.social-links a:hover {
    transform: translateY(-3px);
    border-color: var(--sky-blue);
}

.social-links img {
    width: 20px;
    height: 20px;

    filter: brightness(0) invert(1);
}

.newsletter-preview {
    margin-top: 1.5rem;
}

.newsletter-preview p {
    font-size: .95rem;
}

.footer-bottom {
    border-top: 1px solid var(--border);

    text-align: center;

    padding: 1.5rem;
}

.footer-bottom p {
    color: var(--text-muted);
}