@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@300;400;500;600&display=swap');

:root {
    --card-bg-light: rgba(255, 249, 229, 0.72);
    --text-light: #333;
    --btn-bg-light: rgba(255, 249, 229, 0.5);
    --btn-hover-light: rgba(240, 227, 198, 0.5);
    
    --card-bg-dark: rgba(35, 54, 71, 0.72);
    --text-dark: #e6e6e6;
    --btn-bg-dark: rgba(26, 43, 58, 0.5);
    --btn-hover-dark: rgba(26, 43, 58, 0.9);
    
    --transition-speed: 0.5s;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Poppins', sans-serif;
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    transition: background var(--transition-speed);
    position: relative;
}

body.light-theme {
    background-image: url('light-bg.jpg');
    color: var(--text-light);
}

body.dark-theme {
    background-image: url('dark-bg.jpg');
    color: var(--text-dark);
}

.theme-toggle {
    position: absolute;
    top: 20px;
    right: 20px;
}

#theme-btn {
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: inherit;
    padding: 10px;
    border-radius: 10px;
    display: flex;
    justify-content: center;
    align-items: center;
    transition: background-color var(--transition-speed);
}

.light-theme #theme-btn {
    background-color: var(--btn-bg-light);
}

.dark-theme #theme-btn {
    background-color: var(--btn-bg-dark);
}

.light-theme #theme-btn:hover {
    background-color: var(--btn-hover-light);
}

.dark-theme #theme-btn:hover {
    background-color: var(--btn-hover-dark);
}

.container {
    width: 100%;
    max-width: 800px;
    padding: 20px;
}

.card {
    backdrop-filter: blur(8px);
    border-radius: 20px;
    padding: 40px;
    text-align: center;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    transition: background-color var(--transition-speed), box-shadow var(--transition-speed);
}

.light-theme .card {
    background-color: var(--card-bg-light);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.dark-theme .card {
    background-color: var(--card-bg-dark);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

.header h1 {
    font-size: 3rem;
    margin-bottom: 15px;
    font-weight: 600;
}

.subtitle {
    font-size: 1.2rem;
    font-weight: 300;
    margin-bottom: 30px;
}

.links {
    display: flex;
    justify-content: center;
    gap: 30px;
    margin-top: 20px;
}

.link-btn {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 1.5rem;
    transition: all var(--transition-speed);
    text-decoration: none;
    color: inherit;
}

.light-theme .link-btn {
    background-color: var(--btn-bg-light);
}

.dark-theme .link-btn {
    background-color: var(--btn-bg-dark);
}

.light-theme .link-btn:hover {
    background-color: var(--btn-hover-light);
    transform: translateY(-5px);
}

.dark-theme .link-btn:hover {
    background-color: var(--btn-hover-dark);
    transform: translateY(-5px);
}

@media (max-width: 768px) {
    .header h1 {
        font-size: 2.5rem;
    }
    
    .card {
        padding: 30px 20px;
    }
    
    .link-btn {
        width: 50px;
        height: 50px;
    }
}

@media (max-width: 480px) {
    .header h1 {
        font-size: 2rem;
    }
    
    .subtitle {
        font-size: 1rem;
    }
    
    .links {
        gap: 20px;
    }
    
    .link-btn {
        width: 45px;
        height: 45px;
        font-size: 1.2rem;
    }
}