* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: system-ui, sans-serif;
    background: #0f172a;
    color: #e2e8f0;
}

header {
    position: sticky;
    top: 0;
    z-index: 100;
    padding: 20px;
}

nav {
    max-width: 900px;
    margin: auto;
    display: flex;
    justify-content: space-between;
    align-items: center;

    background: rgba(30, 41, 59, 0.65);
    backdrop-filter: blur(12px);
    padding: 15px 25px;
    border-radius: 16px;
    border: 1px solid rgba(255,255,255,0.1);
}



nav a {
    color: #94a3b8;
    text-decoration: none;
    margin-left: 20px;
}

nav a:hover {
    color: white;
}

.logo {
    font-size: 1.5rem;
    margin: 0;
}

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

.logo span {
    color: #38bdf8;
}

main {
    max-width: 900px;
    margin: auto;
    padding: 20px;
}

.hero {
    min-height: 70vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.hero h2 {
    font-size: 3rem;
    margin-bottom: 10px;
}

.button {
    display: inline-block;
    background: #38bdf8;
    color: #0f172a;
    padding: 12px 20px;
    border-radius: 8px;
    text-decoration: none;
    width: fit-content;
    margin-top: 20px;
}

.page {
    min-height: calc(100vh - 120px);
    padding: 40px 20px;
}

.cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
}

article {
    background: #1e293b;
    padding: 20px;
    border-radius: 12px;
}

footer {
    text-align: center;
    padding: 30px;
    color: #64748b;
}



.nav-links {
    display: flex;
    gap: 25px;
}

.nav-links a {
    color: #94a3b8;
    text-decoration: none;
    position: relative;
    transition: 0.3s;
}

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

.nav-links a.active::after {
    width: 100%;
}

.nav-links a::after {
    content: "";
    position: absolute;
    left: 0;
    bottom: -5px;
    width: 0;
    height: 2px;
    background: #38bdf8;
    transition: 0.3s;
}

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

.nav-links a:hover::after {
    width: 100%;
}


.menu-toggle {
    display: none;
    background: transparent;
    border: none;
    cursor: pointer;
}

.menu-toggle span {
    display: block;
    width: 28px;
    height: 3px;
    background: white;
    margin: 5px;
    border-radius: 5px;
    transition: 0.3s;
}


@media (max-width: 600px) {

    .menu-toggle {
        display: block;
    }

    .nav-links {
        position: absolute;
        top: 75px;
        right: 20px;

        flex-direction: column;
        gap: 15px;

        background: rgba(30,41,59,0.9);
        backdrop-filter: blur(15px);

        padding: 20px;
        border-radius: 16px;

        opacity: 0;
        transform: translateY(-10px);
        pointer-events: none;
        transition: 0.3s;
    }

    .nav-links.show {
        opacity: 1;
        transform: translateY(0);
        pointer-events: auto;
    }
}