* {     
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: sans-serif;
}

.banner {
    width: 100%;
    height: 100vh;
    min-height: 500px;
    background-image: linear-gradient(
        rgba(0, 0, 0, 0.75),
        rgba(0, 0, 0, 0.75)
    ), url('../img/background.jpg');
    background-color: #1a2a2a;
    background-size: cover;
    background-position: center;
    position: relative;
}

/* ── Navbar ─────────────────────────── */
.navbar {
    width: 85%;
    margin: auto;
    padding: 35px 0;
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: relative;
}

.logo {
    width: 160px;
    cursor: pointer;
    height: 75px;
    object-fit: contain;
}

.logo-fallback {
    font-size: 22px;
    font-weight: 900;
    color: #009688;
    letter-spacing: 2px;
    text-transform: uppercase;
    cursor: pointer;
    display: none;
}

.navbar ul {
    display: flex;
    align-items: center;
    list-style: none;
}

.navbar ul li {
    position: relative;
    display: inline-block;
    margin: 0 20px;
}

.navbar ul li a {
    text-decoration: none;
    color: #fff;
    text-transform: uppercase;
    font-weight: bold;
}

.navbar ul li::after {
    content: "";
    height: 3px;
    width: 0;
    background: #009688;
    position: absolute;
    left: 0;
    bottom: -10px;
    transition: 0.5s;
}

.navbar ul li:hover::after {
    width: 100%;
}

/* ── Hamburger ──────────────────────── */
.hamburger {
    display: none;
    flex-direction: column;
    justify-content: space-between;
    width: 28px;
    height: 20px;
    cursor: pointer;
    z-index: 100;
    background: none;
    border: none;
    padding: 0;
}

.hamburger .bar {
    display: block;
    height: 3px;
    width: 100%;
    background: #fff;
    border-radius: 3px;
    transition: 0.4s;
}

.hamburger.active .bar:nth-child(1) {
    transform: translateY(8.5px) rotate(45deg);
}
.hamburger.active .bar:nth-child(2) {
    opacity: 0;
}
.hamburger.active .bar:nth-child(3) {
    transform: translateY(-8.5px) rotate(-45deg);
}

/* ── Hero Content ───────────────────── */
.content {
    width: 100%;
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    text-align: center;
    color: #fff;
    padding: 0 20px;
}

.content h1 {
    font-size: 90px;
    margin-top: 80px;
}

.content p {
    font-size: 20px;
    margin: 20px auto;
    font-weight: 100;
    line-height: 25px;
}

/* ── Buttons ────────────────────────── */
.btn-group {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
}

.btn-group button {
    width: 200px;
    padding: 15px 0;
    text-align: center;
    margin: 20px 10px;
    border-radius: 25px;
    font-weight: bold;
    border: 2px solid #009688;
    background: transparent;
    color: #fff;
    cursor: pointer;
    position: relative;
    overflow: hidden;
    font-size: 16px;
    transition: border 0.3s;
}

.btn-group button .btn-bg {
    background: #009688;
    height: 100%;
    width: 0;
    border-radius: 25px;
    position: absolute;
    left: 0;
    bottom: 0;
    z-index: 0;
    transition: 0.5s;
}

.btn-group button .btn-label {
    position: relative;
    z-index: 1;
}

.btn-group button:hover .btn-bg {
    width: 100%;
}

.btn-group button:hover {
    border-color: transparent;
}

/* ── Tablet (≤ 768px) ───────────────── */
@media (max-width: 768px) {
    .hamburger {
        display: flex;
    }

    .navbar ul {
        display: none;
        flex-direction: column;
        align-items: flex-start;
        gap: 18px;
        position: absolute;
        top: 90px;
        right: 0;
        background: rgba(0, 0, 0, 0.92);
        width: 220px;
        padding: 24px 28px;
        border-radius: 12px;
        z-index: 99;
    }

    .navbar ul.open {
        display: flex;
    }

    .navbar ul li {
        display: block;
        margin: 0;
    }

    .navbar ul li::after {
        bottom: -6px;
    }

    .content h1 {
        font-size: 52px;
        margin-top: 40px;
    }

    .content p {
        font-size: 17px;
    }

    .btn-group button {
        width: 170px;
        font-size: 15px;
    }
}

/* ── Mobile (≤ 480px) ───────────────── */
@media (max-width: 480px) {
    .navbar {
        width: 90%;
        padding: 24px 0;
    }

    .logo {
        width: 120px;
    }

    .content h1 {
        font-size: 36px;
        margin-top: 20px;
    }

    .content p {
        font-size: 15px;
        line-height: 22px;
    }

    .btn-group {
        flex-direction: column;
        align-items: center;
    }

    .btn-group button {
        width: 80%;
        max-width: 260px;
        margin: 8px 0;
    }
}