:root {
    --bg-darkest: #121212;
    --bg-dark: #1a1a1a;
    --bg-medium: #242424;
    --bg-light: #2c2c2c;
    --text-light: #e0e0e0;
    --text-dark: #bbb;
    --accent: #8e44ad;
    --accent-light: #9b59b6;
    --transition: 0.3s ease;
    --border-radius: 8px;
    --hover-scale: 1.05;
}

* { box-sizing: border-box; }

body {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    background: var(--bg-darkest);
    font-family: 'Roboto', sans-serif;
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-light);
    margin: 0;
}

a {
    color: var(--accent-light);
    text-decoration: none;
    transition: color var(--transition);
}
a:hover, a:focus { color: var(--accent); }

ul { list-style-position: inside; padding-left: 0; }

header {
    background-color: var(--bg-dark);
    padding: 20px 0;
    margin-bottom: 20px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    border-bottom-left-radius: var(--border-radius);
    border-bottom-right-radius: var(--border-radius);
}

header h1 {
    font-size: 2.5em;
    color: var(--accent-light);
    margin: 0;
    text-align: center;
}

#main {
    flex: 1;
    padding: 20px;
    display: flex;
    flex-direction: column;
    align-items: center;
}

main {
    display: inline-block;
    user-select: none;
    max-width: 100%;
    overflow-x: auto;
    background-color: var(--bg-dark);
    padding: 20px;
    border-radius: var(--border-radius);
}

.status-info {
    display: flex;
    justify-content: center;
    align-items: center;
    white-space: nowrap;
    margin-bottom: 10px;
    background-color: var(--bg-medium);
    padding: 10px;
    border-radius: var(--border-radius);
}

.status-info span { margin: 0 5px; }

.cell-row { 
    display: flex; 
    justify-content: center;
    gap: 2px;
}

.cell {
    height: 40px;
    width: 40px;
    background: var(--bg-medium);
    font-size: 20px;
    display: flex;
    justify-content: center;
    align-items: center;
    cursor: pointer;
    margin: 1px 0;
}

.cell:hover:not(.revealed):not(.flagged) {
    border-color: var(--accent-light);
}

.cell.touch-screen { height: 48px; width: 48px; }

.revealed {
    border: none;
    background: var(--bg-light);
    cursor: default;
}

.flagged {
    color: #ff4136 !important;
    cursor: not-allowed !important;
    font-size: 90%;
}

.cell-adjacent-1 { color: #3498db; }
.cell-adjacent-2 { color: #2ecc71; }
.cell-adjacent-3 { color: #e74c3c; }
.cell-adjacent-4 { color: var(--accent-light); }
.cell-adjacent-5 { color: #e67e22; }
.cell-adjacent-6 { color: #1abc9c; }
.cell-adjacent-7 { color: #f1c40f; }
.cell-adjacent-8 { color: #95a5a6; }

button, input {
    font-family: 'Roboto', sans-serif;
    font-size: 1em;
    padding: 10px 15px;
    border-radius: var(--border-radius);
    border: none;
    background-color: var(--bg-medium);
    color: var(--text-light);
    transition: background-color 0.3s ease;
}

button:hover, input:hover,
button:focus, input:focus {
    background-color: var(--bg-light);
}

input[type="number"] { padding: 8px 12px; width: 80px; }

.options-container, .start-btn { width: 300px; max-width: 100%; }

.start-btn {
    background-color: var(--accent);
    border: none;
    cursor: pointer;
    font-size: 18px;
    font-weight: bold;
    margin-top: 20px;
    transition: background-color var(--transition), transform var(--transition), box-shadow var(--transition);
}

.start-btn:hover, .start-btn:focus {
    background-color: var(--accent-light);
    transform: scale(var(--hover-scale));
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
}

.options-container {
    background-color: var(--bg-dark);
    border-radius: var(--border-radius);
    padding: 20px;
    margin-top: 20px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.options-container h3 {
    color: var(--accent-light);
    margin: 0 0 15px;
}

.option-row {
    display: flex;
    flex-direction: column;
    margin-bottom: 15px;
}

.option-row label { margin-bottom: 5px; font-weight: bold; }

.option-row input[type="range"] {
    appearance: none;
    width: 100%;
    height: 10px;
    border-radius: var(--border-radius);
    background: var(--bg-medium);
    outline: none;
}

.option-row input[type="range"]:hover,
.option-row input[type="range"]:focus {
    background-color: var(--bg-light);
}

.option-row input[type="range"]::-webkit-slider-thumb,
.option-row input[type="range"]::-moz-range-thumb {
    -webkit-appearance: none;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--accent);
    cursor: pointer;
}

.option-row input[type="range"]::-webkit-slider-thumb:hover,
.option-row input[type="range"]::-moz-range-thumb:hover,
.option-row input[type="range"]::-webkit-slider-thumb:focus,
.option-row input[type="range"]::-moz-range-thumb:focus {
    background-color: var(--accent-light);
    transform: none;
}

.option-value, .option-info {
    text-align: center;
    margin-top: 5px;
    font-size: 14px;
}

.option-info {
    margin-bottom: 15px;
    color: var(--text-dark);
    font-style: italic;
}

.option-info span { font-weight: bold; color: var(--accent-light); }

footer, #links {
    background-color: var(--bg-dark);
    color: var(--text-dark);
    padding: 15px 0;
    text-align: center;
    margin-top: 20px;
    border-top-left-radius: var(--border-radius);
    border-top-right-radius: var(--border-radius);
}

@media (max-width: 768px) {
    .cell { 
        height: 30px; 
        width: 30px; 
        font-size: 16px;
        margin: 1px 0;
    }
    .cell-row {
        gap: 1px;
    }
}

@media (max-width: 480px) {
    .cell { 
        height: 25px; 
        width: 25px; 
        font-size: 14px;
        margin: 1px 0;
    }
    .cell-row {
        gap: 1px;
    }
}

.custom-dropdown {
    position: relative;
    width: 300px;
    max-width: 100%;
    user-select: none;
    margin-bottom: 20px;
}

.dropdown-selected {
    background: var(--bg-dark);
    padding: 12px 15px;
    border: 1px solid var(--accent);
    border-radius: var(--border-radius);
    cursor: pointer;
    position: relative;
    transition: background-color var(--transition),
                border-radius var(--transition);
}

.dropdown-selected:hover {
    background: var(--bg-medium);
}

.dropdown-selected::after {
    content: '';
    position: absolute;
    right: 15px;
    top: 50%;
    transform: translateY(-50%);
    border-left: 6px solid transparent;
    border-right: 6px solid transparent;
    border-top: 6px solid var(--text-light);
    transition: transform var(--transition);
}

.custom-dropdown.active .dropdown-selected {
    border-bottom-left-radius: 0;
    border-bottom-right-radius: 0;
    border-bottom: none;
}

.custom-dropdown.active .dropdown-selected::after {
    transform: translateY(-50%) rotate(180deg);
}

.dropdown-options {
    display: block;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--bg-dark);
    border: 1px solid var(--accent);
    border-top: none;
    border-bottom-left-radius: var(--border-radius);
    border-bottom-right-radius: var(--border-radius);
    z-index: 100;
    
    transform-origin: top;
    transform: scaleY(0);
    opacity: 0;
    transition: transform var(--transition),
                opacity var(--transition),
                border-radius var(--transition);
}

.custom-dropdown.active .dropdown-options {
    transform: scaleY(1);
    opacity: 1;
}

.dropdown-option {
    padding: 12px 15px;
    cursor: pointer;
    transition: background-color var(--transition);
    transform-origin: top;
}

.dropdown-option:hover {
    background: var(--bg-medium);
}

.dropdown-option:last-child {
    border-bottom-left-radius: var(--border-radius);
    border-bottom-right-radius: var(--border-radius);
}