* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    -webkit-tap-highlight-color: transparent;
}

body {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    background: linear-gradient(135deg, #1e3c72, #2a5298);
    color: #fff;
}

.container {
    text-align: center;
}

h1 {
    font-size: 2.5rem;
    margin-bottom: 20px;
}

.watch {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.outer-circle {
    width: 300px;
    height: 300px;
    border-radius: 50%;
    background: linear-gradient(145deg, #2a5298, #1e3c72);
    box-shadow: 0 0 20px rgba(0, 0, 0, 0.5);
    display: flex;
    justify-content: center;
    align-items: center;
}

.inner-circle {
    width: 250px;
    height: 250px;
    border-radius: 50%;
    background: #1e3c72;
    display: flex;
    justify-content: center;
    align-items: center;
    box-shadow: inset 0 0 10px rgba(0, 0, 0, 0.5);
}

.text {
    font-size: 3rem;
    font-weight: bold;
    color: #fff;
}

.buttons {
    margin-top: 20px;
    display: flex;
    gap: 15px;
}

.btn {
    padding: 10px 20px;
    font-size: 1rem;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    transition: background 0.3s ease;
}

.start {
    background: #4CAF50;
    color: #fff;
}

.stop {
    background: #f44336;
    color: #fff;
}

.reset {
    background: #ff9800;
    color: #fff;
}

.btn:hover {
    opacity: 0.9;
}