:root {
    --green: #32d06a;
    --gray-bg: #f9fafb;
    --dark: #23272f;
    --accent: var(--green);
    --font-main: 'Inter', Arial, sans-serif;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    padding: 0;
    font-family: var(--font-main);
    background: var(--gray-bg);
    color: var(--dark);
    min-height: 100vh;
}

.navbar {
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.1rem 1.5rem;
    background: #fff;
    border-bottom: 1px solid #ececec;
    position: sticky;
    top: 0;
    z-index: 100;
}

.navbar-left {
    display: flex;
    align-items: center;
}

.logo {
    display: block;
    max-height: 36px;
    max-width: 44px;
    margin-right: 0.55rem;
    background: none;
    border-radius: 0;
    object-fit: contain;
    width: auto;
    height: auto;
}

.brand {
    font-size: 1.05rem;
}

.navbar-links {
    list-style: none;
    display: flex;
    gap: 1.1rem;
    margin: 0;
    padding: 0;
}

.nav-link {
    text-decoration: none;
    color: var(--dark);
    font-weight: 500;
    padding: 0.3rem 0.7rem;
    border-radius: 6px;
    transition: background 0.15s;
}
.nav-link:hover, .balance-link:hover {
    background: var(--gray-bg);
}
.balance-link {
    color: #fff;
    background: var(--green);
    transition: background 0.15s;
}
.balance-link:hover {
    background: #28ba5b;
}

.hero-section {
    display: flex;
    flex-direction: column-reverse;
    align-items: center;
    justify-content: center;
    min-height: 82vh;
    padding: 2rem 1rem 1rem 1rem;
    gap: 2.5rem;
    max-width: 1200px;
    margin: 0 auto;
}
.hero-content {
    text-align: center;
    max-width: 500px;
}
.slogan {
    font-size: 2.2rem;
    font-weight: 800;
    margin: 0 0 1rem 0;
    letter-spacing: -1.5px;
}
.slogan .accent {
    color: var(--accent);
}
.description {
    font-size: 1.15rem;
    color: #60646b;
    margin-bottom: 2.3rem;
}

.btn-check-balance {
    display: inline-block;
    background: var(--green);
    color: #fff;
    font-size: 1.06rem;
    font-weight: 600;
    padding: 0.85em 2.1em;
    border: none;
    border-radius: 100px;
    cursor: pointer;
    text-decoration: none;
    box-shadow: 0 4px 24px rgba(50,208,106,0.10);
    transition: background 0.17s, box-shadow 0.17s;
}
.btn-check-balance:hover {
    background: #28ba5b;
    box-shadow: 0 8px 24px rgba(50,208,106,0.18);
}

.hero-image {
    width: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    margin-bottom: 0.5rem;
}
.hero-img {
    width: 95%;
    max-width: 400px;
    height: auto;
    border-radius: 1.5rem;
    box-shadow: 0 4px 16px rgba(30, 34, 37, 0.09);
    background: #e9e9e9;
    object-fit: cover;
}

/* Footer styles */
.footer {
    background: #fff;
    border-top: 1px solid #ececec;
    padding: 1.2rem 1.5rem;
    margin-top: 2.5rem;
}
.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    font-size: 0.98rem;
}
.footer-social {
    display: flex;
    gap: 1rem;
}
.footer-social a {
    color: var(--dark);
    opacity: 0.65;
    text-decoration: none;
    transition: opacity 0.13s;
    font-size: 1.18rem;
}
.footer-social a:hover {
    opacity: 1;
}

/* --------- Responsive Design --------- */
@media (min-width: 700px) {
    .hero-section {
        flex-direction: row;
        align-items: center;
        justify-content: space-between;
        gap: 4rem;
        padding: 4.5rem 2rem 2.5rem 2rem;
    }
    .hero-content {
        text-align: left;
        flex: 1 1 45%;
    }
    .hero-image {
        flex: 1 1 50%;
        margin-bottom: 0;
        justify-content: flex-end;
    }
    .hero-img {
        max-width: 480px;
    }
    .footer-content {
        font-size: 1rem;
    }
    .logo {
        max-height: 44px;
        max-width: 56px;
        margin-right: 0.7rem;
    }
    .brand {
        font-size: 1.2rem;
    }
}