:root {
    --bg-light: #ffffff;
    --text-light: #1a1a1a;
    --bg-dark: #1e1e1e;
    --text-dark: #f5f5f5;
}

body.light {
    color: var(--text-light);
    background-image: url("https://plus.unsplash.com/premium_photo-1710865692399-6fe10f968711?w=1000&auto=format&fit=crop&q=60&ixlib=rb-4.1.0&ixid=M3wxMjA3fDB8MHx0b3BpYy1mZWVkfDV8SnI2ZkFNdGZjaVV8fGVufDB8fHx8fA%3D%3D");
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
}

body.dark {
    background-image: url("https://images.unsplash.com/photo-1509023464722-18d996393ca8?w=1000&auto=format&fit=crop&q=60&ixlib=rb-4.1.0&ixid=M3wxMjA3fDB8MHxzZWFyY2h8MXx8ZGFyayUyMG1vZGUlMjB3YWxscGFwZXJ8ZW58MHx8MHx8fDA%3D");
    background-position:center;
    background-size: cover;
    /* background: linear-gradient(270deg, #000000, #1a1a1a, #000000); */
    color: var(--text-dark);
}

body {
    margin: 0;
    font-family: "Helvetica Now Display", Helvetica, sans-serif;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    transition: background 0.4s ease, color 0.3s ease;
}

/* ✅ Light mode — fully transparent so bg image shows through */
body.light .container {
    background: rgba(255, 255, 255, 0.15);
    border: 1px solid rgba(255, 255, 255, 0.4);
    color: #1a1a1a;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
}

/* Dark mode — subtle dark glass */
body.dark .container {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    color: #f5f5f5;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
}

.container {
    position:fixed;
    top:10px;
    left:10px;
    padding: 2rem 3rem;
    border-radius: 16px;
    backdrop-filter: blur(18px);
    -webkit-backdrop-filter: blur(18px);
    transition: background 0.4s ease, border 0.4s ease, box-shadow 0.4s ease;
    text-align: center;
    min-width: 180px;
}

.container h1 {
    margin: 0 0 1.5rem 0;
    font-size: 1.6rem;
    font-weight: 600;
    letter-spacing: -0.3px;
}

#toggletheme {
    font-size: 15px;
    padding: 10px 22px;
    font-weight: 600;
    cursor: pointer;
    text-transform: capitalize;
    border: none;
    border-radius: 8px;
    transition: transform 0.15s ease, opacity 0.2s ease;
    letter-spacing: 0.3px;
}

/* Button adapts to theme */
body.light #toggletheme {
    background: rgba(0, 0, 0, 0.75);
    color: #ffffff;
}

body.dark #toggletheme {
    background: rgba(255, 255, 255, 0.15);
    color: #f5f5f5;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

#toggletheme:hover {
    opacity: 0.85;
    transform: scale(1.03);
}

#toggletheme:active {
    transform: scale(0.97);
}