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

:root {
    --primary-color: #6366f1;
    --secondary-color: #818cf8;
    --background-color: #0f172a;
    --card-background: #1e293b;
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --success-color: #22c55e;
    --danger-color: #ef4444;
}

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

.container {
    width: 100%;
    max-width: 600px;
    padding: 20px;
}

.stopwatch-card {
    background-color: var(--card-background);
    border-radius: 16px;
    padding: 2rem;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
}

h1 {
    text-align: center;
    font-size: 2rem;
    margin-bottom: 2rem;
    color: var(--text-primary);
}

.time-display {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 1rem;
    margin-bottom: 2rem;
}

.time-section {
    display: flex;
    flex-direction: column;
    align-items: center;
    min-width: 80px;
}

.time-section span {
    font-size: 3.5rem;
    font-weight: 700;
    font-variant-numeric: tabular-nums;
    color: var(--primary-color);
}

.time-section label {
    font-size: 0.875rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.separator {
    font-size: 3.5rem;
    font-weight: 700;
    color: var(--text-secondary);
    margin-top: -1rem;
}

.controls {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.btn {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    border: none;
    cursor: pointer;
    font-size: 1.25rem;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
    color: white;
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.start {
    background-color: var(--success-color);
}

.start.active {
    background-color: var(--danger-color);
}

.lap {
    background-color: var(--primary-color);
}

.reset {
    background-color: var(--danger-color);
}

.btn:hover:not(:disabled) {
    transform: scale(1.1);
}

.btn:active:not(:disabled) {
    transform: scale(0.95);
}

.laps-container {
    background-color: rgba(0, 0, 0, 0.2);
    border-radius: 12px;
    padding: 1rem;
    margin-top: 2rem;
}

.laps-container h2 {
    font-size: 1.25rem;
    margin-bottom: 1rem;
    text-align: center;
    color: var(--text-primary);
}

.laps-header {
    display: grid;
    grid-template-columns: 0.5fr 1fr 1fr;
    padding: 0.5rem 1rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    color: var(--text-secondary);
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.laps-list {
    max-height: 300px;
    overflow-y: auto;
}

.lap-item {
    display: grid;
    grid-template-columns: 0.5fr 1fr 1fr;
    padding: 0.75rem 1rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    font-variant-numeric: tabular-nums;
}

.lap-item:last-child {
    border-bottom: none;
}

.lap-item.fastest {
    color: var(--success-color);
}

.lap-item.slowest {
    color: var(--danger-color);
}

/* Scrollbar Styling */
.laps-list::-webkit-scrollbar {
    width: 8px;
}

.laps-list::-webkit-scrollbar-track {
    background: rgba(255, 255, 255, 0.1);
    border-radius: 4px;
}

.laps-list::-webkit-scrollbar-thumb {
    background: var(--primary-color);
    border-radius: 4px;
}

.laps-list::-webkit-scrollbar-thumb:hover {
    background: var(--secondary-color);
}