:root {
    --bg-color: #0d1117;
    --text-color: #c9d1d9;
    --accent-color: #3f88e6;
    --panel-bg: #161b22;
    --border-color: #30363d;
}

body.light-theme {
    --bg-color: #f6f8fa;
    --text-color: #24292f;
    --accent-color: #0969da;
    --panel-bg: #ffffff;
    --border-color: #d0d7de;
}

body {
    background-color: var(--bg-color);
    color: var(--text-color);
    display: flex;
    height: 100vh;
    margin: 0;
    font-family: monospace;
    transition: background-color 0.3s, color 0.3s;
    overflow: hidden;
}

#sidebar {
    width: 320px;
    background-color: var(--panel-bg);
    border-right: 1px solid var(--border-color);
    padding: 20px;
    box-sizing: border-box;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.control-group {
    display: flex;
    flex-direction: column;
    gap: 5px;
}

.control-group label {
    font-size: 12px;
    font-weight: bold;
    display: flex;
    justify-content: space-between;
}

input[type="range"] {
    width: 100%;
    cursor: pointer;
}

input[type="number"],
input[type="text"],
select,
textarea {
    width: 100%;
    background-color: var(--bg-color);
    color: var(--text-color);
    border: 1px solid var(--border-color);
    padding: 5px;
    font-family: monospace;
    box-sizing: border-box;
}

textarea {
    resize: vertical;
}

#workspace {
    flex-grow: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    position: relative;
}

#theme-toggle {
    position: absolute;
    top: 20px;
    right: 20px;
}

#container {
    position: relative;
    border: 1px dashed var(--border-color);
    background-color: transparent;
    display: flex;
    align-items: center;
    justify-content: center;
}

svg {
    display: block;
}

svg text {
    text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.8), 0 0 3px rgba(0, 0, 0, 0.8);
}

.action-btn {
    padding: 10px 15px;
    background: transparent;
    color: var(--accent-color);
    border: 1px solid var(--accent-color);
    cursor: pointer;
    font-weight: bold;
    font-family: monospace;
    transition: 0.3s;
    text-align: center;
}

.action-btn:hover:not(:disabled) {
    background: var(--accent-color);
    color: var(--bg-color);
}

.action-btn:disabled {
    border-color: #555 !important;
    color: #555 !important;
    cursor: not-allowed;
    background: transparent !important;
}

.section-title {
    margin: 10px 0 0;
    padding-bottom: 5px;
    border-bottom: 1px solid var(--border-color);
    font-size: 14px;
    color: var(--accent-color);
}

.page-title {
    margin-top: 0;
    font-size: 16px;
}