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

:root{
    --bg: #131619;
    --card: rgba(19, 22, 25, 0.9);
    --text: #FFFFFF;
    --accent: #10B981;
}

body[data-theme="light"]{
    --bg: #FFFFFF;
    --card: rgba(255,255,255,0.95);
    --text: #131619;
}

body{
    background-color: var(--bg);
    color: var(--text);
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    flex-direction: column;
}

.stopwatch{
    background-color: var(--card);
    padding: 20px 24px;
    border-radius: 10px;
}

.timerDisplay{
    font-size: 50px;
    font-weight: 600;
    color: var(--accent);
}

.buttons{
    margin-top: 20px;
}

.btn{
    font-size: 20px;
    background: none;
    border: none;
    color: var(--text);
    background-color: var(--accent);
    padding: 12px 24px;
    margin-inline: 12px;
    border-radius: 8px;
    cursor: pointer;
}

.btn.small{
    padding: 8px 12px;
    font-size: 14px;
}

.topbar{
    width: 100%;
    display: flex;
    justify-content: flex-end;
    padding: 12px 24px;
    box-sizing: border-box;
}

.watermark{
    position: fixed;
    bottom: 8px;
    left: 0;
    width: 100%;
    text-align: center;
    font-size: 12px;
    color: var(--text);
    opacity: 0.7;
    pointer-events: none;
}