* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px;
}

.container {
    background: #282C34;
    border-radius: 12px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
    padding: 40px;
    max-width: 500px;
    width: 100%;
    text-align: center;
}

h1 {
    color: #e8eaed;
    margin-bottom: 30px;
    font-size: 2.5em;
    font-weight: 400;
}

.duration-section {
    background: #1f2228;
    border-radius: 8px;
    padding: 20px;
    margin-bottom: 30px;
}

.duration-section h3 {
    color: #abb2bf;
    margin-bottom: 15px;
    font-weight: 500;
    font-size: 1.1em;
}

.duration-controls {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 15px;
    flex-wrap: wrap;
}

.duration-controls span {
    color: #abb2bf;
}

.duration-controls .btn-secondary {
    background: #FF8F33;
    color: #282C34;
}

.duration-controls .btn-secondary:hover {
    background: #FFA04D;
}

input[type="number"] {
    width: 80px;
    padding: 8px 12px;
    border: 1px solid #5C6370;
    border-radius: 6px;
    font-size: 16px;
    text-align: center;
    background: #282C34;
    color: #e8eaed;
}

input[type="number"]:focus {
    outline: none;
    border-color: #FF6F00;
}

.timer-display {
    background: #1f2228;
    border-radius: 8px;
    padding: 30px;
    margin-bottom: 30px;
}

.time-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
    padding: 10px 0;
}

.time-row:last-child {
    margin-bottom: 0;
}

.time-label {
    font-weight: 500;
    color: #abb2bf;
    font-size: 1.1em;
}

.time-value {
    font-family: 'Courier New', monospace;
    font-size: 1.8em;
    font-weight: bold;
    min-width: 120px;
    text-align: right;
}

.time-row:first-child .time-value {
    color: #FF6F00;
}

.time-remaining {
    color: #ffffff;
}

.progress-container {
    margin-top: 20px;
}

.progress-bar {
    width: 100%;
    height: 20px;
    background: #282C34;
    border-radius: 10px;
    overflow: hidden;
    margin-top: 10px;
}

.progress-fill {
    height: 100%;
    background: #8EC07C;
    border-radius: 10px;
    transition: width 0.3s ease;
    width: 0%;
}

.progress-fill.warning {
    background: #FFB84D;
}

.progress-fill.critical {
    background: #FF6F00;
}

.controls {
    display: flex;
    justify-content: center;
    gap: 15px;
    flex-wrap: wrap;
    margin-bottom: 20px;
}

button {
    padding: 10px 24px;
    border: none;
    border-radius: 6px;
    font-size: 15px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
    min-width: 120px;
}

.btn-primary {
    background: #FF6F00;
    color: #ffffff;
}

.btn-primary:hover {
    background: #FF8F33;
}

.controls .btn-secondary {
    background: #D32F2F;
    color: #ffffff;
}

.controls .btn-secondary:hover {
    background: #E53935;
}

.btn-success {
    background: #8EC07C;
    color: #282C34;
}

.btn-success:hover {
    background: #9FCC8F;
}

.status-bar {
    background: #1f2228;
    padding: 10px;
    border-radius: 6px;
    font-weight: 500;
    color: #abb2bf;
}

.status-running {
    background: #2a3a2e;
    color: #8EC07C;
}

.status-stopped {
    background: #3a2d2d;
    color: #FF8F33;
}

.status-complete {
    background: #3a3229;
    color: #FFB84D;
}

@media (max-width: 480px) {
    .container {
        padding: 20px;
    }

    h1 {
        font-size: 2em;
    }

    .time-value {
        font-size: 1.4em;
    }

    .controls {
        flex-direction: column;
    }

    button {
        width: 100%;
    }
}