/* General Reset and Base */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: #111827; /* dark gray */
    color: #f9fafb; /* light text */
}

.container {
    background-color: #1f2937; /* slightly lighter dark */
    padding: 3rem;
    border-radius: 1rem;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.4);
    text-align: center;
    min-width: 320px;
    width: 90%;
    max-width: 400px;
}

/* Timer Text */
#timer {
    font-size: 3rem;
    font-weight: 600;
    margin-bottom: 2rem;
    letter-spacing: 2px;
}

/* Buttons */
.buttons {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
}

button {
    background-color: #374151;
    border: none;
    border-radius: 50%;
    padding: 1rem 1.2rem;
    cursor: pointer;
    transition: background 0.3s, transform 0.2s;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.3);
}

button:hover {
    background-color: #4b5563;
    transform: scale(1.05);
}

button:active {
    transform: scale(0.95);
}

button i {
    font-size: 1.5rem;
    color: #f3f4f6;
}