/* ==============================
   GLOBAL STYLES
   ============================== */

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
    background-color: #f4f7f6;
    color: #333;
    line-height: 1.6;
}


/* ==============================
   HEADER
   ============================== */

header {
    background: #2c3e50;
    color: white;

    padding: 1rem 2rem;

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

    position: sticky;
    top: 0;
    z-index: 100;
}

.logo {
    font-size: 1.5rem;
    font-weight: bold;
}


/* ==============================
   NAVIGATION
   ============================== */

nav a {
    color: white;
    text-decoration: none;
    margin-left: 1.5rem;
    transition: color 0.3s;
}

nav a:hover {
    color: #1abc9c;
}


/* ==============================
   HERO SECTION
   ============================== */

.hero {
    background: linear-gradient(
        135deg,
        #2c3e50,
        #3498db
    );

    color: white;

    text-align: center;

    padding: 6rem 2rem;
}

.hero h1 {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.hero p {
    font-size: 1.2rem;

    margin-bottom: 2rem;

    max-width: 600px;

    margin-inline: auto;
}


/* ==============================
   BUTTON
   ============================== */

.btn {
    background: #1abc9c;

    color: white;

    padding: 0.8rem 2rem;

    border: none;

    border-radius: 5px;

    font-size: 1rem;

    cursor: pointer;

    text-decoration: none;

    transition: background 0.3s;
}

.btn:hover {
    background: #16a085;
}


/* ==============================
   FEATURES
   ============================== */

.features {
    display: flex;

    justify-content: space-around;

    flex-wrap: wrap;

    padding: 4rem 2rem;

    max-width: 1200px;

    margin: 0 auto;

    gap: 2rem;
}


/* ==============================
   CARDS
   ============================== */

.card {
    background: white;

    padding: 2rem;

    border-radius: 8px;

    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);

    text-align: center;

    flex: 1;

    min-width: 250px;

    transition: transform 0.3s, box-shadow 0.3s;
}

.card:hover {
    transform: translateY(-5px);

    box-shadow: 0 8px 15px rgba(0, 0, 0, 0.15);
}

.card h3 {
    margin-bottom: 1rem;

    color: #2c3e50;
}


/* ==============================
   FOOTER
   ============================== */

footer {
    background: #2c3e50;

    color: white;

    text-align: center;

    padding: 1.5rem;

    font-size: 0.9rem;
}


/* ==============================
   MOBILE RESPONSIVE
   ============================== */

@media (max-width: 768px) {

    header {
        flex-direction: column;

        gap: 1rem;

        text-align: center;
    }

    nav a {
        margin: 0 0.5rem;
    }

    .hero {
        padding: 4rem 1.5rem;
    }

    .hero h1 {
        font-size: 2rem;
    }

    .hero p {
        font-size: 1rem;
    }

    .features {
        padding: 3rem 1.5rem;
    }

    .card {
        min-width: 100%;
    }
}