* {
    box-sizing: border-box
}

body {
    margin: 0;
    font-family: system-ui, Segoe UI, Roboto, Arial, sans-serif;
    background: #0f172a;
    color: #e2e8f0;
    display: grid;
    place-items: center;
    min-height: 100vh
}

.container {
    width: min(720px, 90vw)
}

h1 {
    font-weight: 700;
    text-align: center;
    margin: 16px 0 5px;
}

h3 {
    font-weight: 400;
    text-align: center;
    margin: 0 0 24px;
}

.card {
    background: #1e293b;
    border-radius: 16px;
    padding: 24px;
    box-shadow: 0 8px 24px rgba(0, 0, 0, .35)
}

.display {
    font-size: 64px;
    text-align: center;
    margin: 12px 0 20px
}

.controls {
    display: flex;
    gap: 12px;
    justify-content: center;
    flex-wrap: wrap
}

button {
    padding: 12px 16px;
    border: none;
    border-radius: 10px;
    cursor: pointer
}

#inc {
    background: #16a34a;
    color: white
}

#dec {
    background: #dc2626;
    color: white
}

#reset {
    background: #334155;
    color: #e2e8f0
}

button:active {
    transform: translateY(1px)
}