:root {
    --background-color: #1a1a1a; /* Dark background */
    --surface-color: #2c2c2c;   /* Slightly lighter for panels */
    --text-color: #e0e0e0;
    --text-muted-color: #a0a0a0;
    --primary-accent: #a1ff75;  /* Erik Lens brand color */
    --primary-accent-darker: #82cc5e; /* For hover states */
    --border-color: #444444;
    --input-bg-color: #333333;
    --input-border-color: #555555;
    --button-text-color: #1a1a1a; /* Dark text for light accent button */
    --shadow-color: rgba(0, 0, 0, 0.3);
    --error-color: #ff6b6b;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.7;
    margin: 0;
    padding: 20px;
    background-color: var(--background-color);
    color: var(--text-color);
    display: flex;
    justify-content: center;
    align-items: flex-start;
    min-height: 100vh;
}

.container {
    background: var(--surface-color);
    padding: 25px 35px;
    border-radius: 12px;
    box-shadow: 0 8px 25px var(--shadow-color);
    width: 100%;
    max-width: 800px; /* Increased max-width for more space */
    margin-top: 20px;
    margin-bottom: 20px;
}

header {
    text-align: center;
    margin-bottom: 30px;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 20px;
}

h1 {
    color: var(--primary-accent);
    font-size: 2.2em;
    margin-bottom: 0.2em;
}

.subtitle {
    font-size: 1.1em;
    color: var(--text-muted-color);
}

h2 {
    color: var(--primary-accent);
    margin-top: 0;
    margin-bottom: 20px;
    font-size: 1.6em;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 10px;
}

.io-panel {
    background-color: var(--background-color); /* Darker than container surface */
    padding: 20px;
    border-radius: 8px;
    margin-bottom: 30px;
    box-shadow: inset 0 2px 4px rgba(0,0,0,0.2);
}

.input-group, .output-group, .control-group {
    margin-bottom: 20px;
}

label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: var(--text-muted-color);
    font-size: 0.95em;
}

input[type="file"],
input[type="number"],
textarea {
    width: calc(100% - 22px);
    padding: 12px;
    border: 1px solid var(--input-border-color);
    border-radius: 6px;
    box-sizing: border-box;
    background-color: var(--input-bg-color);
    color: var(--text-color);
    font-family: 'Fira Code', 'Consolas', monospace; /* Good for code */
    font-size: 0.9em;
}
input[type="file"] {
    padding: 8px; /* File input often needs different padding */
}

input[type="number"] {
    width: 80px; /* Smaller width for number inputs */
    margin-right: 5px;
}

input[type="color"] {
    width: 50px;
    height: 35px;
    padding: 2px;
    border: 1px solid var(--input-border-color);
    border-radius: 6px;
    background-color: var(--input-bg-color);
    vertical-align: middle;
}

textarea {
    resize: vertical;
    min-height: 120px;
}

button, a#downloadLink {
    display: inline-block; /* For multiple buttons */
    padding: 12px 20px;
    background-color: var(--primary-accent);
    color: var(--button-text-color);
    font-weight: bold;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    text-align: center;
    font-size: 1em;
    margin-top: 10px;
    text-decoration: none;
    transition: background-color 0.2s ease;
}

button:hover, a#downloadLink:hover {
    background-color: var(--primary-accent-darker);
}

#convertButton.button-primary {
    display: block; /* Make main convert button full width */
    width: 100%;
    font-size: 1.1em;
    margin-top: 0; /* Remove top margin if it's the last element in its group */
}

.output-actions {
    margin-top: 15px;
    display: flex;
    gap: 15px; /* Spacing between buttons */
}

.output-actions button, .output-actions a {
    flex-grow: 1; /* Make buttons share space */
}

/* Preview Panel */
.preview-controls {
    display: flex;
    flex-wrap: wrap;
    gap: 20px; /* Spacing between control groups */
    margin-bottom: 20px;
    align-items: flex-end; /* Align items nicely */
}

.preview-controls .control-group {
    margin-bottom: 0; /* Remove bottom margin as gap handles it */
}

#svgPreviewBox {
    width: 200px; /* Initial size, will be dynamic */
    height: 200px; /* Initial size, will be dynamic */
    border: 2px dashed var(--primary-accent);
    background-color: var(--input-bg-color); /* Default background */
    padding: 10px;
    box-sizing: border-box;
    margin: 0 auto; /* Center the preview box */
    overflow: hidden; /* Prevent SVG overflow if not scaling correctly */
    display: flex;
    justify-content: center;
    align-items: center;
    transition: width 0.2s ease, height 0.2s ease, background-color 0.2s ease, color 0.2s ease;
    color: var(--primary-accent); /* Default parent color for SVG */
}

#svgPreviewBox svg {
    width: 100%;
    height: 100%;
    display: block; /* Remove extra space below inline SVGs */
}

.preview-placeholder {
    font-style: italic;
    color: var(--text-muted-color);
    text-align: center;
}

footer {
    text-align: center;
    margin-top: 40px;
    padding-top: 20px;
    border-top: 1px solid var(--border-color);
    font-size: 0.9em;
    color: var(--text-muted-color);
}

footer a {
    color: var(--primary-accent);
    text-decoration: none;
}

footer a:hover {
    text-decoration: underline;
}