:root {
    --primary-color: #2196f3;
    --background-color: #f5f5f5;
    --card-background: #ffffff;
    --text-color: #333333;
}

body {
    font-family: 'Roboto', sans-serif;
    margin: 0;
    padding: 20px;
    background-color: var(--background-color);
    color: var(--text-color);
    min-height: 100vh;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
    padding: 20px;
}

.card {
    background: var(--card-background);
    border-radius: 15px;
    padding: 25px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 300px;
}

.card:hover {
    transform: translateY(-5px);
}

.time-display {
    text-align: center;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

.time-wrapper {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

.current-time {
    font-size: 3.5rem;
    font-weight: 300;
    margin: 0;
    color: var(--primary-color);
}

.current-date {
    font-size: 1.5rem;
    color: #666;
    margin: 10px 0;
}

.pomodoro-container {
    text-align: center;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.timer-display {
    font-size: 4rem;
    font-weight: 300;
    margin: 20px 0;
    color: var(--primary-color);
}

.button-group {
    display: flex;
    gap: 10px;
    justify-content: center;
}

button {
    padding: 12px 24px;
    border: none;
    border-radius: 25px;
    background-color: var(--primary-color);
    color: white;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.3s ease;
}

button:hover {
    background-color: #1976d2;
    transform: scale(1.05);
}

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

.reset-btn {
    background-color: #ff5722;
}

.reset-btn:hover {
    background-color: #f4511e;
}