/* Reset */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "Helvetica Neue", Arial, sans-serif;
}

body {
    background: #ffffff;
    color: #111;
    line-height: 1.7;
}

/* Navigation */
header {
    width: 100%;
    border-bottom: 1px solid #eee;
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(12px);
    position: sticky;
    top: 0;
    z-index: 100;
}

nav {
    max-width: 1200px;
    margin: auto;
    padding: 18px 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 20px;
    font-weight: 600;
    letter-spacing: -0.5px;
}

.nav-links a {
    margin-left: 24px;
    text-decoration: none;
    color: #111;
    font-weight: 500;
    opacity: 0.8;
    transition: 0.2s;
}

.nav-links a:hover {
    opacity: 1;
}

/* Hero Section */
.hero {
    text-align: center;
    padding: 140px 20px;
    background: #fafafa;
}

.hero h1 {
    font-size: 48px;
    font-weight: 700;
    margin-bottom: 16px;
}

.hero p {
    opacity: 0.7;
    font-size: 18px;
    max-width: 600px;
    margin: auto;
    margin-bottom: 32px;
}

.cta {
    display: inline-block;
    padding: 14px 34px;
    border-radius: 32px;
    background: black;
    color: white;
    text-decoration: none;
    font-size: 16px;
    transition: 0.25s;
}

.cta:hover {
    background: #333;
}

/* Section Styling */
.section {
    max-width: 900px;
    margin: 100px auto;
    padding: 0 24px;
    text-align: center;
}

.section h2 {
    font-size: 36px;
    margin-bottom: 20px;
    font-weight: 600;
}

.section p {
    font-size: 18px;
    opacity: 0.8;
}

/* Cards */
.cards {
    display: flex;
    justify-content: center;
    gap: 24px;
    margin-top: 40px;
    flex-wrap: wrap;
}

.card {
    width: 280px;
    padding: 24px;
    border-radius: 20px;
    background: #f8f8f8;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
    transition: 0.25s;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 6px 18px rgba(0,0,0,0.08);
}

.card h3 {
    margin-bottom: 12px;
    font-size: 22px;
}

/* Footer */
footer {
    text-align: center;
    padding: 40px;
    margin-top: 80px;
    font-size: 14px;
    opacity: 0.6;
}

/* Fade-in animation */
.fade-in {
    opacity: 0;
    animation: fadeIn 1.4s ease forwards;
}

@keyframes fadeIn {
    to { opacity: 1; }
}

/* --------------------------------------------- */
/* RESPONSIVE DESIGN FOR MOBILE */
/* --------------------------------------------- */

/* Tablet and below */
@media (max-width: 992px) {
    .hero h1 {
        font-size: 40px;
    }

    nav {
        padding: 16px 16px;
    }
}

/* Mobile phones */
@media (max-width: 768px) {

    /* Nav links shrink and space tighter */
    .nav-links a {
        margin-left: 14px;
        font-size: 15px;
    }

    .hero {
        padding: 100px 20px;
    }

    .hero h1 {
        font-size: 32px;
    }

    .hero p {
        font-size: 16px;
    }

    /* Cards become single-column */
    .cards {
        flex-direction: column;
        align-items: center;
    }

    .card {
        width: 90%;
        max-width: 340px;
    }

    .section {
        margin: 70px auto;
        padding: 0 16px;
    }

    .section h2 {
        font-size: 30px;
    }
}

/* Very small phones */
@media (max-width: 480px) {

    nav {
        flex-direction: column;
        gap: 12px;
    }

    .nav-links a {
        margin-left: 10px;
        font-size: 14px;
    }

    .hero h1 {
        font-size: 26px;
    }

    .hero p {
        font-size: 15px;
    }

    footer {
        font-size: 12px;
        padding: 30px;
    }
}