:root {
    --tuna: #3d3d42;
    --iron: #e5e6e7;
    --smalt-blue: #557b84;
    --oslo-gray: #858687;
    --gull-gray: #94aab0;
    --mid-gray: #626263;
    --regent-gray: #929ba4;
    --shuttle-gray: #576b75;
    --dusty-gray: #a49c9c;
    --cutty-sark: #50676c;
}

body {
    margin: 0;
    padding: 0;
    font-family: 'Segoe UI', sans-serif;
    background-color: var(--dusty-gray);
    color: var(--iron);
    height: 100vh;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
}

.welcome-card {
    background: rgba(255, 255, 255, 0.5);
    border-radius: 20px;
    padding: 40px;
    box-shadow: 0 0 30px rgba(0, 0, 0, 0.3);
    animation: fadeInUp 1.5s ease;
    text-align: center;
    z-index: 2;
}

.welcome-card h1 {
    color: var(--smalt-blue);
}

.welcome-card p {
    color: var(--smalt-blue);
}

.welcome-btn {
    margin: 10px;
    width: 140px;
    transition: transform 0.2s ease;
}

.welcome-btn:hover {
    transform: scale(1.1);
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.logo {
    max-width: 300px;
    width: 100%;
    height: auto;
    margin-bottom: 5px;
    animation: logoFade 2s ease-in-out infinite alternate;
}

@keyframes logoFade {
    from {
        transform: scale(1);
        opacity: 0.8;
    }
    to {
        transform: scale(1.1);
        opacity: 1;
    }
}

/* Olas */
.waves {
    position: absolute;
    bottom: 0;
    width: 100%;
    height: 200px;
    background: transparent;
    overflow: hidden;
    z-index: 1;
}

.wave {
    position: absolute;
    width: 200%;
    height: 100%;
    background: var(--mid-gray);
    border-radius: 100%;
    opacity: 0.4;
    animation: waveAnimation 8s infinite linear;
}

.wave:nth-child(2) {
    top: 30px;
    background: var(--smalt-blue);
    opacity: 0.5;
    animation-delay: -2s;
}

.wave:nth-child(3) {
    top: 60px;
    background: var(--cutty-sark);
    opacity: 0.6;
    animation-delay: -4s;
}

@keyframes waveAnimation {
    0% {
        transform: translateX(0);
    }
    100% {
        transform: translateX(-50%);
    }
}