body {
    font-family: 'Arial', sans-serif;
    background: linear-gradient(to bottom, #ffecd2, #fcb69f);
    margin: 0;
    padding: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    color: #333;
}

.container {
    text-align: center;
    background: rgba(255, 255, 255, 0.9);
    padding: 40px;
    border-radius: 20px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    max-width: 600px;
    animation: fadeIn 2s ease-in-out;
}

h1 {
    font-size: 3em;
    color: #ff6b6b;
    margin-bottom: 20px;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
}

p {
    font-size: 1.5em;
    line-height: 1.6;
    color: #555;
}

.balloons {
    display: flex;
    justify-content: center;
    margin-top: 30px;
}

.balloon {
    width: 50px;
    height: 70px;
    border-radius: 50% 50% 50% 50% / 60% 60% 40% 40%;
    position: relative;
    margin: 0 10px;
    animation: float 3s ease-in-out infinite;
}

.balloon1 {
    background: #ff6b6b;
    animation-delay: 0s;
}

.balloon2 {
    background: #4ecdc4;
    animation-delay: 1s;
}

.balloon3 {
    background: #ffe66d;
    animation-delay: 2s;
}

.balloon::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 2px;
    height: 20px;
    background: #333;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-20px); }
}

.wish-button {
    margin-top: 30px;
    padding: 15px 30px;
    font-size: 1.2em;
    background: linear-gradient(45deg, #ff6b6b, #ffe66d);
    color: white;
    border: none;
    border-radius: 25px;
    cursor: pointer;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.wish-button:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.3);
}

.birthday-box {
    display: none;
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: rgba(255, 255, 255, 0.95);
    padding: 30px;
    border-radius: 20px;
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.3);
    text-align: center;
    max-width: 400px;
    z-index: 1000;
    animation: fadeIn 0.5s ease-in-out;
}

.birthday-box h2 {
    color: #ff6b6b;
    margin-bottom: 15px;
}

.birthday-box p {
    font-size: 1.2em;
    color: #555;
    line-height: 1.5;
}

.close-button {
    margin-top: 20px;
    padding: 10px 20px;
    background: #ff6b6b;
    color: white;
    border: none;
    border-radius: 15px;
    cursor: pointer;
    font-size: 1em;
    transition: background 0.3s ease;
}

.close-button:hover {
    background: #e55a5a;
}