:root {
    --bg-primary: #2c2c2c;
    --bg-secondary: #333;
    --bg-tertiary: rgba(30,30,30,0.95);
    --text-primary: #E0E0E0;
    --text-secondary: #f0f0f0;
    --text-muted: #888;
    --border-primary: #444;
    --border-secondary: #555;
    --accent-primary: #41aaff;
    --accent-secondary: #0088cc;
    --accent-blue: #0022ff;
    --accent-orange: #ff8800;
    --accent-green: #00ff00;
    --accent-hover: #33ccff;
    --success: #4CAF50;
    --white: #fff;
    --shadow: rgba(0,0,0,0.2);
    --shadow-strong: rgba(0,0,0,0.5);
}
* {
    user-select: none;
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
}
body {
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    height: 100vh;
    margin: 0;
    font-family: Arial, sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
}
.title {
    text-align: center;
    margin-top: 40px;
    font-size: 2em;
}
.canvas {
    display: flex;
    justify-content: center;
    flex-grow: 1;
    align-items: center;
}
.bottom {
    display: flex;
    justify-content: center;
    margin: 20px;
}
.command-input {
    position: fixed;
    bottom: 25%;
    left: 50%;
    transform: translateX(-50%);
    width: 400px;
    max-width: 80%;
    display: none;
    z-index: 100;
}
.command-input.visible {
    display: block;
}
.text-output {
    width: 100%;
}
.command-input input {
    width: 100%;
    padding: 14px 24px;
    box-sizing: border-box;
    background-color: var(--bg-secondary);
    color: var(--text-primary);
    border: 1px solid var(--border-primary);
    border-radius: 50px;
    font-size: 16px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
    outline: none;
    transition: border-color 0.2s, box-shadow 0.2s;
}
.command-input input:focus {
    border-color: var(--accent-primary);
    box-shadow: 0 4px 16px rgba(65, 170, 255, 0.3);
}
.command-input input::placeholder {
    color: var(--text-muted);
}
.text-output div {
    padding: 10px;
    box-sizing: border-box;
    background-color: transparent;
    color: var(--text-primary);
    border: none;
    text-align: center;
}
.toggle-btn {
    background-color: var(--bg-secondary);
    color: var(--text-primary);
    border: 1px solid var(--border-primary);
    padding: 10px;
    margin: 5px 5px;
    cursor: pointer;
    position: relative;
    transition: all 0.3s ease;
    border-radius: 4px;
}
.toggle-btn.active {
    background-color: var(--accent-primary);
    border: 1px solid var(--accent-secondary);
    box-shadow: 0 0 12px rgba(0, 180, 255, 0.5);
    color: var(--white);
}
.toggle-btn.new-mark::after {
    content: '';
    position: absolute;
    top: 0px;
    right: 0px;
    width: 0;
    height: 0;
    border-left: 4px solid transparent;
    border-right: 4px solid var(--accent-orange);
    border-bottom: 4px solid transparent;
    border-top: 4px solid var(--accent-orange);
}
.toggle-btn.subset-mark::after {
    content: '';
    position: absolute;
    top: 0px;
    right: 0px;
    width: 0;
    height: 0;
    border-left: 4px solid transparent;
    border-right: 4px solid var(--accent-blue);
    border-bottom: 4px solid transparent;
    border-top: 4px solid var(--accent-blue);
}
.toggle-btn.non-zero-mark::after {
    content: '';
    position: absolute;
    top: 0px;
    left: 0px;
    width: 0;
    height: 0;
    border-left: 4px solid var(--accent-green);
    border-right: 4px solid transparent;
    border-bottom: 4px solid transparent;
    border-top: 4px solid var(--accent-green);
}
.hover-text {
    position: absolute;
    text-align: left;
    top: 100%;
    left: 0;
    width: max-content;
    max-width: 250px;
    background-color: var(--bg-secondary);
    color: var(--text-secondary);
    border: 1px solid var(--border-secondary);
    border-radius: 4px;
    padding: 8px;
    z-index: 10;
    box-shadow: 0 2px 5px var(--shadow);
    display: none;
}
.toggle-btn:hover .hover-text {
    display: block;
}
#nextButton {
    background-color: var(--bg-secondary);
    color: var(--text-primary);
    border: 1px solid var(--border-primary);
    padding: 10px;
    margin: 20px;
    cursor: pointer;
}
#menu-icon div {
    width: 25px;
    height: 3px;
    background-color: var(--white);
    margin: 5px 0;
    transition: 0.3s;
}
#menu-icon {
    position: fixed;
    top: 20px;
    left: 20px;
    cursor: pointer;
    z-index: 1000;
}
#settings-panel {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 360px;
    height: 480px;
    background-color: var(--bg-tertiary);
    border-radius: 20px;
    box-shadow: 0 10px 25px var(--shadow-strong);
    display: none;
    flex-direction: column;
    padding: 30px;
    z-index: 2000;
}
#settings-content {
    flex-grow: 1;
    overflow-y: auto;
    padding-right: 10px;
    margin-bottom: 5px;
}
#settings-content::-webkit-scrollbar {
    width: 8px;
}
#settings-content::-webkit-scrollbar-thumb {
    background-color: var(--border-secondary);
    border-radius: 4px;
}
#settings-content::-webkit-scrollbar-thumb:hover {
    background-color: #777;
}
.setting {
    margin: 15px 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.setting label {
    color: var(--text-primary);
}
.setting input[type="checkbox"] {
    appearance: none;
    width: 20px;
    height: 20px;
    background-color: var(--bg-secondary);
    border-radius: 5px;
    cursor: pointer;
    position: relative;
}
.setting input[type="checkbox"]:checked {
    background-color: var(--success);
}
.setting input[type="checkbox"]:checked::after {
    content: '✔';
    color: var(--white);
    font-size: 16px;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}
.setting input[type="range"] {
    width: 150px;
    accent-color: var(--success);
}
.setting select {
    width: 150px;
    padding: 5px;
    border-radius: 5px;
    background-color: var(--bg-secondary);
    color: var(--white);
    border: 1px solid var(--border-secondary);
}
.slider-value {
    width: 40px;
    text-align: right;
}
#back-button,
#tutorial-restart-btn {
    position: relative;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    padding: 10px 20px;
    background-color: var(--bg-secondary);
    color: var(--white);
    border: none;
    border-radius: 20px;
    cursor: pointer;
    transition: background-color 0.3s;
    margin-top: 10px;
}
#back-button:hover,
#tutorial-restart-btn:hover {
    background-color: var(--border-primary);
}
#timer-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: var(--bg-primary);
    display: none;
    justify-content: center;
    align-items: center;
    z-index: 3000;
    cursor: pointer;
}
#timer-display {
    font-size: 12em;
    font-weight: bold;
    color: var(--text-primary);
    font-family: 'Courier New', Courier, monospace;
}

/* Tutorial Modal Styles */
.modal {
    display: none;
    position: fixed;
    z-index: 5000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(5px);
}
.modal-content {
    background-color: var(--bg-tertiary);
    margin: 10% auto;
    padding: 30px;
    border: 2px solid var(--border-primary);
    border-radius: 15px;
    width: 90%;
    max-width: 600px;
    box-shadow: 0 4px 20px var(--shadow-strong);
    animation: slideIn 0.3s ease-out;
}
@keyframes slideIn {
    from {
        transform: translateY(-50px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}
.modal-content h2 {
    color: var(--accent-primary);
    margin-top: 0;
    text-align: center;
}
.tutorial-text {
    color: var(--text-primary);
    line-height: 1.8;
    margin: 20px 0;
}
.tutorial-text ul {
    list-style-type: none;
    padding-left: 0;
}
.tutorial-text li {
    margin: 12px 0;
    padding-left: 25px;
    position: relative;
}
.tutorial-text li:before {
    content: "▸";
    position: absolute;
    left: 0;
    color: var(--accent-primary);
}
.tutorial-text code {
    background-color: var(--bg-secondary);
    padding: 2px 6px;
    border-radius: 3px;
    font-family: 'Courier New', monospace;
    color: var(--accent-orange);
}
.tutorial-text h3 {
    color: var(--accent-primary);
    margin: 25px 0 10px 0;
    font-size: 1.3em;
    font-weight: bold;
}

.tutorial-text p {
    margin: 15px 0;
}
.tutorial-text a {
    font-weight: bold;
}
#tutorial-close-btn {
    display: block;
    margin: 20px auto 0;
    padding: 12px 40px;
    background-color: var(--accent-primary);
    color: var(--white);
    border: none;
    border-radius: 25px;
    font-size: 1.1em;
    font-weight: bold;
    cursor: pointer;
    transition: background-color 0.3s, transform 0.1s;
}
#tutorial-close-btn:hover {
    background-color: var(--accent-hover);
    transform: scale(1.05);
}
#tutorial-close-btn:active {
    transform: scale(0.98);
}
#config-close-btn {
    display: block;
    margin: 20px auto 0;
    padding: 12px 40px;
    background-color: var(--accent-primary);
    color: var(--white);
    border: none;
    border-radius: 25px;
    font-size: 1.1em;
    font-weight: bold;
    cursor: pointer;
    transition: background-color 0.3s, transform 0.1s;
}
#config-close-btn:hover:not(:disabled) {
    background-color: var(--accent-hover);
    transform: scale(1.05);
}
#config-close-btn:active:not(:disabled) {
    transform: scale(0.98);
}
#config-close-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}
.modal-content input[type="text"],
.modal-content select {
    background-color: var(--bg-secondary);
    color: var(--text-primary);
    border: 1px solid var(--border-primary);
    border-radius: 5px;
    padding: 8px 12px;
    font-size: 1em;
}
.modal-content input[type="text"]:focus,
.modal-content select:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 2px rgba(65, 170, 255, 0.2);
}

/* 4-Panel Tutorial System */
.tutorial-panel {
    height: 500px;
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
    align-items: stretch;
}

.tutorial-panel h2 {
    flex-shrink: 0;
    margin-bottom: 20px;
}

.tutorial-panel .tutorial-text {
    display: flex;
    flex-direction: column;
    justify-content: center;
    flex-grow: 1;
}

.tutorial-panel .tutorial-text > * {
    /* Compact grouping of tutorial content */
}

#tutorial-panel-1 {
    align-items: center;
    text-align: center;
}

#tutorial-panel-1 .tutorial-text {
    text-align: center;
}

.tutorial-navigation {
    display: flex;
    flex-direction: column;
    align-items: center;
    margin-top: 30px;
    padding-top: 20px;
    border-top: 1px solid var(--border-primary);
    gap: 20px;
}

.tutorial-dots {
    display: flex;
    gap: 10px;
}

.tutorial-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background-color: var(--border-primary);
    cursor: pointer;
    transition: background-color 0.3s;
}

.tutorial-dot.active {
    background-color: var(--accent-primary);
}

.tutorial-dot:hover {
    background-color: var(--accent-hover);
}

#tutorial-next-btn {
    padding: 10px 20px;
    background-color: var(--accent-primary);
    color: var(--white);
    border: none;
    border-radius: 20px;
    font-size: 1em;
    cursor: pointer;
    transition: background-color 0.3s, transform 0.1s;
}

#tutorial-next-btn:hover {
    background-color: var(--accent-hover);
    transform: scale(1.05);
}

#tutorial-next-btn:active {
    transform: scale(0.98);
}

/* File Configuration Styles */
.file-config-section {
    margin: 20px 0;
}

.file-config-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px;
    background-color: var(--bg-secondary);
    border-radius: 8px;
    margin: 10px 0;
}

.file-label {
    font-weight: bold;
    color: var(--text-primary);
}

.file-actions {
    display: flex;
    gap: 10px;
}

.download-btn,
.upload-btn {
    padding: 8px 16px;
    border: none;
    border-radius: 5px;
    font-size: 0.9em;
    cursor: pointer;
    transition: background-color 0.3s, transform 0.1s;
    background-color: var(--accent-primary);
    color: var(--white);
}

.download-btn:hover,
.upload-btn:hover {
    background-color: var(--accent-hover);
    transform: scale(1.05);
}

.download-btn:active,
.upload-btn:active {
    transform: scale(0.98);
}

.upload-status {
    font-size: 0.8em;
    color: var(--accent-primary);
    margin-left: 8px;
    font-weight: bold;
}