body, html {
    margin: 0;
    padding: 0;
    font-family: 'Helvetica Neue', sans-serif;
    text-align: center;
    background: linear-gradient(to bottom, #a2d9ff, #ffffff);
    height: 100%;
    animation: fadeInBody 2s ease-in;
}

@keyframes fadeInBody {
    0% { opacity: 0; }
    100% { opacity: 1; }
}

header {
    width: 100%;
    overflow: hidden;
}

#logo {
    width: 100%;
    height: auto;
    animation: fadeInLogo 2.5s ease-in-out;
}

@keyframes fadeInLogo {
    0% { opacity: 0; transform: translateY(-30px); }
    100% { opacity: 1; transform: translateY(0); }
}

main {
    margin-top: 20px;
    padding: 20px;
}

.content h1 {
    font-size: 2.5em;
    margin-bottom: 0.2em;
    animation: fadeInText 3s ease-in;
}

.content p {
    font-size: 1.5em;
    margin-bottom: 1em;
    animation: fadeInText 3.5s ease-in;
}

@keyframes fadeInText {
    0% { opacity: 0; transform: translateY(20px); }
    100% { opacity: 1; transform: translateY(0); }
}

#countdown-container {
    margin-top: 30px;
    margin-bottom: 30px;
    font-size: 1.8em;
}

#countdown {
    font-size: 2em;
    margin-bottom: 1em;
}

.button {
    display: inline-block;
    padding: 15px 30px;
    font-size: 1.2em;
    color: white;
    background-color: #0077cc;
    border: none;
    border-radius: 30px;
    text-decoration: none;
    transition: background-color 0.3s, transform 0.3s;
    animation: fadeInButton 4.5s ease-in;
}

@keyframes fadeInButton {
    0% { opacity: 0; transform: scale(0.95); }
    100% { opacity: 1; transform: scale(1); }
}

.button:hover {
    background-color: #005fa3;
    transform: scale(1.05);
}

#certification {
    margin-top: 50px;
    font-size: 1.2em;
    color: #333;
}

#certification h3 {
    font-size: 1.5em;
    margin-bottom: 10px;
    color: #0077cc;
}

#certification strong {
    font-size: 1.4em;
}

footer {
    margin-top: 40px;
    font-size: 0.9em;
    color: #555;
}