@font-face {
    font-family: 'Roboto Flex';
    src: url('Roboto-Flex-Variable.ttf') format('truetype-variations');
    font-weight: 100 1000;
    font-stretch: 25% 151%;
}

:root {
    --bg-preview: #090909;
    --bg-sidebar: #1B1B1B;
    --text-color: #FFFFFF;
    --border-color: #333333;
    --input-bg: #2C2C2C;
}

[data-theme="light"] {
    --bg-preview: #FFFFFF;
    --bg-sidebar: #EEEEEE;
    --text-color: #000000;
    --border-color: #CCCCCC;
    --input-bg: #E3E3E3;
}

[data-theme="purple"] {
    --bg-preview: #16161E;
    --bg-sidebar: #1A1B27;
    --text-color: #FFFFFF;
    --border-color: #2A2A3A;
    --input-bg: #1E202E;
}

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

html,
body {
    height: 100%;
    overflow: hidden;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: var(--bg-preview);
    color: var(--text-color);
    -webkit-font-smoothing: antialiased;
}

.container {
    display: grid;
    grid-template-columns: 1fr 320px;
    height: 100vh;
    gap: 0;
}

/* Preview Area */
.preview-area {
    padding-right: 2px;
    border-right: 1px solid var(--border-color);
    background: var(--bg-preview);
    position: relative;
    height: 100vh;
    overflow: hidden;
}

.theme-switcher {
    position: absolute;
    top: 20px;
    right: 20px;
    display: flex;
    gap: 8px;
    z-index: 10;
}

.theme-btn {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    border: 1px solid var(--border-color);
    cursor: pointer;
    transition: transform 0.2s;
}

.theme-btn:hover {
    transform: scale(1.1);
}

.theme-btn[data-theme="dark"] {
    background: #090909;
}

.theme-btn[data-theme="light"] {
    background: #FFFFFF;
}

.theme-btn[data-theme="purple"] {
    background: #16161E;
}

.theme-btn.active {
    border-width: 2px;
    border-color: var(--text-color);
}

.preview-textarea {
    width: 100%;
    height: 100%;
    min-height: calc(100vh - 40px);
    font-family: 'Roboto Flex', sans-serif;
    font-size: 22px;
    border: none;
    outline: none;
    resize: none;
    padding: 60px 28px 28px;
    line-height: 1.5;
    background: transparent;
    color: var(--text-color);
    overflow-y: auto;
    font-variation-settings:
        'opsz' 14, 'wght' 400, 'GRAD' 0, 'wdth' 100,
        'slnt' 0, 'XOPQ' 96, 'YOPQ' 79, 'XTRA' 468,
        'YTUC' 712, 'YTLC' 514, 'YTAS' 750, 'YTDE' -203, 'YTFI' 738;
}

/* Sidebar */
.sidebar {
    background: var(--bg-sidebar);
    height: 100vh;
    overflow-y: auto;
    position: relative;
}

.sidebar-content {
    padding: 20px 20px 0;
    /* Space for sticky button */
}

.sidebar-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.sidebar-content h2 {
    font-size: 18px;
    font-weight: 700;
    margin: 0;
    color: var(--text-color);
}

.reset-all-btn {
    padding: 4px 8px;
    font-size: 11px;
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-color);
    cursor: pointer;
    white-space: nowrap;
}

.reset-all-btn:hover {
    background: var(--text-color);
    color: var(--bg-sidebar);
}

.controls-section {
    margin-bottom: 30px;
}

.controls-section h3 {
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 15px;
    padding-bottom: 5px;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-color);
}

/* Control Groups */
.control-group {
    margin-bottom: 15px;
}

.control-group>label:first-child {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 12px;
    font-weight: 500;
    margin-bottom: 5px;
    color: var(--text-color);
}

.auto-label-wrapper {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    cursor: pointer;
}

.auto-checkbox {
    width: 12px;
    height: 12px;
    margin-right: 2px;
    cursor: pointer;
    vertical-align: middle;
    accent-color: var(--text-color);
}

.auto-label {
    font-size: 11px;
    font-weight: 400;
    opacity: 0.7;
    cursor: pointer;
}

.slider-container {
    display: flex;
    align-items: center;
    gap: 8px;
}

/* Sliders */
input[type="range"] {
    flex: 1;
    height: 4px;
    background: var(--border-color);
    outline: none;
    -webkit-appearance: none;
}

input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 12px;
    height: 12px;
    background: var(--text-color);
    cursor: pointer;
    border-radius: 50%;
}

input[type="range"]::-moz-range-thumb {
    width: 12px;
    height: 12px;
    background: var(--text-color);
    cursor: pointer;
    border: none;
    border-radius: 50%;
}

/* Value Input */
.value-input {
    width: 50px;
    padding: 4px 6px;
    font-size: 12px;
    background: var(--input-bg);
    border: none;
    border-radius: 4px;
    color: var(--text-color);
    text-align: right;
    font-variant-numeric: tabular-nums;
}

.value-input:focus {
    outline: 1px solid var(--text-color);
}

/* Adapt spinner colors to theme */
:root .value-input,
[data-theme="purple"] .value-input {
    color-scheme: dark;
}

[data-theme="light"] .value-input {
    color-scheme: light;
}

/* Style number input spinners */
.value-input::-webkit-inner-spin-button,
.value-input::-webkit-outer-spin-button {
    opacity: 1;
    cursor: pointer;
}

/* Reset Button */
.reset-btn {
    width: 20px;
    height: 20px;
    padding: 0;
    background: var(--input-bg);
    border: none;
    border-radius: 4px;
    color: var(--text-color);
    font-size: 14px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    line-height: 1;
}

.reset-btn:hover {
    background: var(--text-color);
    color: var(--bg-sidebar);
}

/* Checkboxes */
.checkbox-group {
    margin-bottom: 8px;
}

.checkbox-label {
    display: flex;
    align-items: center;
    cursor: pointer;
    padding: 4px 0;
}

.checkbox-label input[type="checkbox"] {
    width: 14px;
    height: 14px;
    margin-right: 8px;
    cursor: pointer;
    accent-color: var(--text-color);
}

.checkbox-label span {
    font-size: 12px;
    color: var(--text-color);
}

/* Download Container & Button */
.download-container {
    position: sticky;
    bottom: 0;
    background: var(--bg-sidebar);
    padding: 12px 0 20px;
    border-top: 1px solid var(--border-color);
    z-index: 10;
}

.download-buttons {
    display: flex;
    gap: 8px;
}

button#download-btn {
    flex: 1;
    padding: 16px;
    background: var(--text-color);
    border: none;
    color: var(--bg-sidebar);
    font-size: 12px;
    font-weight: 600;
    cursor: pointer;
    border-radius: 8px;
    position: relative;
}

.download-woff2-btn {
    padding: 16px 20px;
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-color);
    font-size: 11px;
    font-weight: 600;
    cursor: pointer;
    border-radius: 8px;
    white-space: nowrap;
    position: relative;
}

.download-woff2-btn:hover {
    background: var(--border-color);
}

.download-woff2-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

button#download-btn:hover {
    opacity: 0.8;
}

button#download-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* Loading Spinner */
.spinner {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 16px;
    height: 16px;
    border: 2px solid transparent;
    border-top-color: currentColor;
    border-radius: 50%;
    animation: spin 0.6s linear infinite;
}

@keyframes spin {
    to {
        transform: translate(-50%, -50%) rotate(360deg);
    }
}

button.loading {
    pointer-events: none;
}

button.loading .btn-text {
    visibility: hidden;
}

/* Responsive */
@media (max-width: 768px) {
    .container {
        grid-template-columns: 1fr;
        grid-template-rows: 1fr 1fr;
    }

    .preview-area {
        height: 50vh;
        overflow: auto;
        border-right: none;
        border-bottom: 1px solid var(--border-color);
    }

    .sidebar {
        height: 50vh;
        border-left: none;
    }
}