body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    padding: 10px;
    color: #333;
}

@media (min-width: 768px) {
    body {
        padding: 20px;
    }
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    background: white;
    border-radius: 16px;
    box-shadow: 0 20px 60px rgba(0,0,0,0.3);
    overflow: hidden;
}

.header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 15px;
}

@media (min-width: 768px) {
    .header {
        padding: 30px;
        gap: 20px;
    }
}

.header-content {
    flex: 1;
    text-align: center;
    min-width: 0;
}

.header h1 {
    font-size: 1.5em;
    margin-bottom: 8px;
    font-weight: 700;
    word-wrap: break-word;
}

@media (min-width: 768px) {
    .header h1 {
        font-size: 2.5em;
        margin-bottom: 10px;
    }
}

.header .subtitle {
    font-size: 0.9em;
    opacity: 0.9;
}

@media (min-width: 768px) {
    .header .subtitle {
        font-size: 1.1em;
    }
}

.header-actions {
    display: flex;
    gap: 10px;
    align-items: center;
}

.settings-header-btn {
    background: rgba(255, 255, 255, 0.2);
    border: 2px solid rgba(255, 255, 255, 0.3);
    color: white;
    padding: 10px 16px;
    border-radius: 8px;
    cursor: pointer;
    font-weight: 600;
    font-size: 0.9em;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    gap: 6px;
    min-height: 44px; /* Touch target size */
}

@media (min-width: 768px) {
    .settings-header-btn {
        padding: 12px 24px;
        font-size: 1em;
        gap: 8px;
    }
}

.settings-header-btn:hover {
    background: rgba(255, 255, 255, 0.3);
    border-color: rgba(255, 255, 255, 0.5);
    transform: translateY(-2px);
}

.content {
    display: flex;
    flex-direction: column;
    gap: 15px;
    padding: 15px;
}

@media (min-width: 768px) {
    .content {
        gap: 20px;
        padding: 30px;
    }
}