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

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

body {
    font-family: 'Inter', sans-serif;
    background: linear-gradient(135deg, #0f0f0f, #1a1a1a);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    color: #f5f5f5;
}

.container {
    width: 420px;
    padding: 35px;
    border-radius: 18px;
    background: rgba(30, 30, 30, 0.6);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255,255,255,0.05);
    box-shadow: 
        0 10px 40px rgba(0, 0, 0, 0.6),
        inset 0 0 20px rgba(255, 255, 255, 0.02);
    transition: 0.3s ease;
}

.container:hover {
    transform: translateY(-4px);
}

h1 {
    text-align: center;
    margin-bottom: 30px;
    font-size: 22px;
    font-weight: 600;
    letter-spacing: 0.5px;
}

.input-group {
    margin-bottom: 20px;
}

label {
    display: block;
    font-size: 13px;
    margin-bottom: 8px;
    opacity: 0.8;
}

input {
    width: 100%;
    padding: 12px 14px;
    border-radius: 12px;
    border: 1px solid rgba(255,255,255,0.08);
    background: rgba(255,255,255,0.04);
    color: white;
    font-size: 14px;
    transition: 0.2s ease;
}

input:focus {
    outline: none;
    border-color: #00ff99;
    background: rgba(0, 255, 153, 0.05);
    box-shadow: 0 0 12px rgba(0, 255, 153, 0.2);
}

.result-box {
    margin-top: 25px;
    padding: 20px;
    border-radius: 16px;
    background: linear-gradient(135deg, #111, #1d1d1d);
    border: 1px solid rgba(0,255,153,0.1);
    text-align: center;
}

.result-box h2 {
    font-size: 14px;
    font-weight: 500;
    margin-bottom: 10px;
    opacity: 0.8;
}

#result {
    font-size: 32px;
    font-weight: 600;
    background: linear-gradient(90deg, #00ff99, #00ccff);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

footer {
    margin-top: 30px;
    text-align: center;
    font-size: 12px;
    opacity: 0.6;
    letter-spacing: 0.3px;
}