html,
body {
    margin: 0;
    min-height: 100%;
    font-family: Arial, sans-serif;
    color: #1f2933;
}

body {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    background:
        radial-gradient(circle at top left, rgba(91, 141, 239, 0.18), transparent 35%),
        linear-gradient(135deg, #f7fafc 0%, #e8eef5 100%);
}

.landing-page {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 48px 24px;
}

.hero {
    width: 100%;
    max-width: 1050px;
}

.hero-content {
    background: rgba(255, 255, 255, 0.82);
    border: 1px solid rgba(255, 255, 255, 0.7);
    border-radius: 28px;
    padding: 56px;
    box-shadow: 0 24px 70px rgba(31, 41, 55, 0.16);
    backdrop-filter: blur(10px);
}

.eyebrow {
    margin: 0 0 12px;
    font-size: 13px;
    text-transform: uppercase;
    letter-spacing: 0.14em;
    font-weight: 700;
    color: #5c6f82;
}

h1 {
    margin: 25px;
    font-size: clamp(34px, 5vw, 58px);
    line-height: 1.05;
}

.intro {
    max-width: 720px;
    margin: 24px 0 36px;
    font-size: 18px;
    line-height: 1.6;
    color: #52616f;
}

.viewer-buttons {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 50px;
}

.viewer-button {
    display: flex;
    flex-direction: column;
    gap: 50px;

    padding: 28px;
    min-height: 135px;

    border-radius: 22px;
    text-decoration: none;
    color: white;

    box-shadow: 0 14px 34px rgba(31, 41, 55, 0.22);
    transition: transform 0.18s ease, box-shadow 0.18s ease;
}

.viewer-button:hover {
    transform: translateY(-4px);
    box-shadow: 0 20px 42px rgba(31, 41, 55, 0.28);
}

.viewer-button:focus {
    outline: 3px solid rgba(31, 41, 55, 0.35);
    outline-offset: 4px;
}

.viewer-button.solar {
    background: #f59e0b;
}

.viewer-button.wind {
    background: #2563eb;
}

.button-title {
    font-size: 22px;
    font-weight: 700;
    line-height: 1.25;
}

.button-subtitle {
    font-size: 14px;
    opacity: 0.9;
}

.footer {
    padding: 10px 16px;
    text-align: center;
    font-size: 12px;
    color: #6b7280;
}

@media (max-width: 760px) {
    .hero-content {
        padding: 32px 24px;
    }

    .viewer-buttons {
        grid-template-columns: 1fr;
    }
}