:root {
    --pastel-green: #98C9A3;
    --black: #000000;
    --white: #FFFFFF;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

body {
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    background-color: #f5f5f5;
}

.container {
    background-color: var(--white);
    padding: 2rem;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    width: 90%;
    max-width: 400px;
}

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

.setup-container, .timer-container {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.input-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

input {
    padding: 0.5rem;
    border: 1px solid #ddd;
    border-radius: 5px;
    font-size: 1rem;
}

button {
    padding: 0.8rem;
    border: none;
    border-radius: 5px;
    background-color: var(--pastel-green);
    color: var(--black);
    font-size: 1rem;
    cursor: pointer;
    transition: opacity 0.3s ease;
}

button:hover {
    opacity: 0.9;
}

button:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.timer {
    font-size: 4rem;
    font-weight: bold;
    text-align: center;
    color: var(--black);
}

.status, .progress {
    text-align: center;
    color: #666;
    font-size: 1.1rem;
}

.controls {
    display: flex;
    gap: 1rem;
    margin-top: 1rem;
}

.controls button {
    flex: 1;
}