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

body {
    font-family: 'Segoe UI', sans-serif;
    background: #f4f6fb;
    color: #222;
    transition: 0.3s;
}

/* Dark Mode */
body.dark {
    background: #0f0f14;
    color: #eee;
}

/* Header */
header {
    position: sticky;
    top: 0;
    width: 100%;
    background: white;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
    z-index: 1000;
}

body.dark header {
    background: #15151d;
}

.container {
    width: 90%;
    max-width: 1200px;
    margin: auto;
}

.nav-wrapper {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.logo img {
    height: 40px;
}

/* Navigation */
nav ul {
    display: flex;
    list-style: none;
}

nav ul li {
    margin-left: 30px;
}

nav ul li a {
    text-decoration: none;
    color: inherit;
    font-weight: 600;
    transition: 0.3s;
}

nav ul li a:hover {
    color: #6a5af9;
}

/* Hamburger */
.hamburger {
    display: none;
    font-size: 28px;
    cursor: pointer;
}

/* Hero */
.hero {
    padding: 120px 0;
    background: linear-gradient(135deg, #6a5af9, #ff4fa3);
    color: white;
    text-align: center;
}

.hero h1 {
    font-size: 48px;
    margin-bottom: 20px;
}

.hero p {
    font-size: 20px;
    opacity: 0.9;
}

/* Sections */
section {
    padding: 80px 0;
}

.section-title {
    text-align: center;
    margin-bottom: 50px;
    font-size: 32px;
}

/* Cards */
.cards {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.card {
    background: white;
    padding: 30px;
    border-radius: 12px;
    box-shadow: 0 15px 30px rgba(0,0,0,0.05);
    transition: 0.4s;
    opacity: 0;
    transform: translateY(40px);
}

.card.show {
    opacity: 1;
    transform: translateY(0);
}

body.dark .card {
    background: #1c1c26;
}

/* Footer */
footer {
    background: #111;
    color: #aaa;
    padding: 60px 0;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
}

footer h4 {
    margin-bottom: 15px;
    color: white;
}

footer a {
    color: #ff4fa3;
    text-decoration: none;
}

/* Responsive */
@media (max-width: 992px) {
    .cards {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {

    nav ul {
        position: absolute;
        top: 70px;
        right: 0;
        background: white;
        flex-direction: column;
        width: 220px;
        display: none;
        padding: 20px;
        box-shadow: 0 10px 20px rgba(0,0,0,0.1);
    }

    body.dark nav ul {
        background: #1c1c26;
    }

    nav ul.active {
        display: flex;
    }

    nav ul li {
        margin: 15px 0;
    }

    .hamburger {
        display: block;
    }

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

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

    .hero h1 {
        font-size: 34px;
    }
}