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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background-color: #e8f5e9;
    color: #000;
    min-height: 100vh;
    padding: 20px;
}

.container {
    max-width: 900px;
    margin: 0 auto;
}

.title {
    text-align: center;
    font-size: 28px;
    margin-bottom: 24px;
    color: #000;
}

.section {
    background-color: #fff;
    border-radius: 8px;
    padding: 0;
    margin-bottom: 16px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.control-table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0 4px;
}

.control-row {
    background-color: #f5f5f5;
}

.control-row td {
    padding: 12px 16px;
    vertical-align: middle;
}

.control-label {
    width: 120px;
    min-width: 120px;
    font-weight: 600;
    font-size: 14px;
    color: #000;
}

.control-value {
    width: 100%;
}

.inline-group {
    display: flex;
    align-items: center;
    gap: 16px;
    flex-wrap: wrap;
}

.toggle-group {
    display: flex;
    gap: 10px;
    align-items: center;
}

.toggle-item {
    display: flex;
    align-items: center;
}

.toggle-item input[type="checkbox"] {
    display: none;
}

.toggle-btn {
    display: inline-block;
    padding: 6px 12px;
    background-color: #4caf50;
    color: #fff;
    border-radius: 4px;
    cursor: pointer;
    font-size: 13px;
    transition: background-color 0.2s, opacity 0.2s;
    white-space: nowrap;
}

.toggle-item input[type="checkbox"]:checked + .toggle-btn {
    background-color: #66bb6a;
    opacity: 1;
}

.toggle-item input[type="checkbox"]:not(:checked) + .toggle-btn {
    background-color: #bdbdbd;
    opacity: 0.6;
}

.button-group {
    display: flex;
    gap: 8px;
    align-items: center;
}

.action-btn {
    padding: 6px 12px;
    background-color: #2196f3;
    color: #fff;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 13px;
    transition: background-color 0.2s;
    white-space: nowrap;
}

.action-btn:hover {
    background-color: #1976d2;
}

.action-btn:active {
    background-color: #0d47a1;
}

.input-char {
    width: 100%;
    padding: 7px 12px;
    border: 1px solid #ccc;
    border-radius: 4px;
    font-size: 14px;
    background-color: #fff;
}

.input-char:focus {
    outline: none;
    border-color: #2196f3;
}

.constraint-block {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.constraint-input-row {
    display: flex;
    align-items: center;
    gap: 12px;
}

.constraint-label {
    font-size: 14px;
    color: #000;
    min-width: 70px;
    white-space: nowrap;
}

.param-group {
    display: flex;
    gap: 32px;
    align-items: center;
    flex-wrap: wrap;
}

.param-item {
    display: flex;
    align-items: center;
    gap: 12px;
}

.param-label {
    font-size: 14px;
    color: #000;
    white-space: nowrap;
}

.param-inputs {
    display: flex;
    align-items: center;
    gap: 8px;
}

.param-separator {
    color: #666;
}

.input-num {
    width: 110px;
    padding: 6px 10px;
    border: 1px solid #ccc;
    border-radius: 4px;
    font-size: 14px;
    background-color: #fff;
}

.input-num:focus {
    outline: none;
    border-color: #2196f3;
}

.button-bar {
    display: flex;
    justify-content: center;
    gap: 24px;
    margin: 24px 0;
}

.generate-btn, .copy-btn {
    padding: 12px 32px;
    background-color: #2196f3;
    color: #fff;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 16px;
    font-weight: 500;
    transition: background-color 0.2s;
}

.generate-btn:hover, .copy-btn:hover {
    background-color: #1976d2;
}

.generate-btn:active, .copy-btn:active {
    background-color: #0d47a1;
}

.result-section {
    background-color: #fff;
    border-radius: 8px;
    padding: 16px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.result-title {
    font-size: 18px;
    font-weight: 600;
    color: #000;
    margin-bottom: 12px;
}

.result-output {
    width: 100%;
    min-height: 200px;
    padding: 12px;
    border: 1px solid #ccc;
    border-radius: 4px;
    font-family: 'Courier New', Courier, monospace;
    font-size: 14px;
    background-color: #f5f5f5;
    resize: vertical;
}

.result-output:focus {
    outline: none;
    border-color: #2196f3;
    background-color: #fff;
}

.toast {
    position: fixed;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    background-color: #323232;
    color: #fff;
    padding: 12px 24px;
    border-radius: 4px;
    font-size: 14px;
    opacity: 0;
    transition: opacity 0.3s;
    pointer-events: none;
    z-index: 1000;
}

.toast.show {
    opacity: 1;
}