* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: Poppins, sans-serif;
}

body {
    background: linear-gradient(135deg, #2e3192, #1bffff);
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    color: white;
}

.container {
    text-align: center;
    background: rgba(255, 255, 255, 0.1);
    padding: 30px;
    border-radius: 20px;
    backdrop-filter: blur(10px);
}

#display {
    font-size: 50px;
    margin: 20px 0;
    font-weight: 600;
}

.buttons button {
    padding: 12px 25px;
    margin: 10px;
    font-size: 18px;
    border: none;
    border-radius: 10px;
    cursor: pointer;
    transition: 0.2s;
}

#start { background: #28a745; }
#pause { background: #ffc107; }
#reset { background: #dc3545; }

.buttons button:hover {
    opacity: 0.8;
}