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

:root {
    --bg-primary: #1a1a1a;
    --bg-secondary: #242424;
    --bg-tertiary: #2e2e2e;
    --border-color: #3a3a3a;
    --text-primary: #e0e0e0;
    --text-secondary: #999;
    --accent: #4a9eff;
    --accent-hover: #6db3ff;
    --sidebar-width: 240px;
    --toolbar-height: 40px;
}

body {
    background: var(--bg-primary);
    color: var(--text-primary);
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    font-size: 13px;
    overflow: hidden;
    height: 100vh;
    width: 100vw;
}

#app {
    display: flex;
    flex-direction: column;
    height: 100vh;
}

/* Toolbar */
#toolbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: var(--toolbar-height);
    background: #000000;
    border-bottom: 1px solid var(--border-color);
    padding: 0 12px;
    flex-shrink: 0;
}

.toolbar-left {
    display: flex;
    align-items: center;
    gap: 8px;
}

.app-logo {
    height: 24px;
    width: 24px;
}

.app-title {
    font-weight: 600;
    font-size: 14px;
    background: linear-gradient(135deg, #ff6b35, #f7c948, #ff6b35);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.toolbar-actions {
    display: flex;
    gap: 6px;
}

.toolbar-actions button {
    padding: 4px 12px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    border-radius: 4px;
    cursor: pointer;
    font-size: 12px;
}

.toolbar-actions button:hover {
    background: var(--accent);
    border-color: var(--accent);
    color: #fff;
}

.toolbar-copyright {
    color: var(--text-secondary);
    font-size: 11px;
    text-decoration: none;
    margin-left: 8px;
}

.toolbar-copyright:hover {
    color: var(--text-primary);
}

/* Main layout */
#main-layout {
    display: flex;
    flex: 1;
    overflow: hidden;
}

/* Sidebar */
#sidebar {
    width: var(--sidebar-width);
    background: var(--bg-secondary);
    border-left: 1px solid var(--border-color);
    padding: 12px;
    overflow-y: auto;
    flex-shrink: 0;
    order: 1;
}

.control-group {
    margin-bottom: 12px;
}

.control-group > label {
    display: block;
    margin-bottom: 4px;
    color: var(--text-secondary);
    font-size: 12px;
}

.section-title {
    display: block;
    font-weight: 600;
    margin-bottom: 6px;
    color: var(--text-primary);
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

select {
    width: 100%;
    padding: 4px 6px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    border-radius: 4px;
    font-size: 12px;
}

input[type="range"] {
    width: 100%;
    margin: 4px 0;
}

.range-value {
    display: block;
    text-align: right;
    font-size: 11px;
    color: var(--text-secondary);
    font-family: monospace;
}

.range-with-color {
    display: flex;
    gap: 6px;
    align-items: center;
}

.range-with-color input[type="range"] {
    flex: 1;
}

.range-with-color input[type="color"] {
    width: 28px;
    height: 24px;
    padding: 0;
    border: 1px solid var(--border-color);
    border-radius: 3px;
    background: none;
    cursor: pointer;
}

input[type="checkbox"] {
    margin-right: 4px;
}

.separator {
    height: 1px;
    background: var(--border-color);
    margin: 12px 0;
}

/* Hints */
.hints .hint {
    font-size: 11px;
    color: var(--text-secondary);
    margin-bottom: 3px;
}

.hints kbd {
    display: inline-block;
    padding: 1px 4px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 3px;
    font-size: 10px;
    font-family: monospace;
}

/* Main area */
#main-area {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

/* Preview */
#preview-container {
    flex: 1;
    position: relative;
    background: #111;
    min-height: 200px;
    overflow: hidden;
}

#preview {
    width: 100%;
    height: 100%;
}

#scale-overlay {
    position: absolute;
    left: 0;
    top: 0;
    width: 80px;
    height: 100%;
    z-index: 2;
    pointer-events: auto;
}

#btn-zoom-fit {
    position: absolute;
    bottom: 6px;
    right: 6px;
    padding: 2px 8px;
    font-size: 11px;
    background: rgba(50, 50, 50, 0.7);
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
    border-radius: 3px;
    cursor: pointer;
    z-index: 5;
}

#btn-zoom-fit:hover {
    background: rgba(80, 80, 80, 0.9);
    color: var(--text-primary);
}

#preview-placeholder {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: var(--text-secondary);
    text-align: center;
    font-size: 14px;
    pointer-events: none;
}

/* Scale indicator popup */
.scale-popup {
    position: fixed;
    z-index: 10;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 8px;
    min-width: 160px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.5);
}

.scale-popup label {
    display: block;
    font-size: 11px;
    color: var(--text-secondary);
    margin-bottom: 4px;
}

.scale-popup .popup-row {
    display: flex;
    align-items: center;
    gap: 6px;
    margin-bottom: 4px;
}

.scale-popup input[type="color"] {
    width: 32px;
    height: 24px;
    padding: 0;
    border: 1px solid var(--border-color);
    border-radius: 3px;
    background: none;
    cursor: pointer;
}

.scale-popup input[type="checkbox"] {
    margin-right: 4px;
}

.scale-popup .popup-close {
    position: absolute;
    top: 4px;
    right: 6px;
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 14px;
    line-height: 1;
}

.scale-popup .popup-close:hover {
    color: var(--text-primary);
}

/* Scrollbar styling */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-primary);
}

::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: #555;
}

/* License dialog */
.license-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.6);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 100;
}

.license-dialog {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 20px;
    width: 340px;
    box-shadow: 0 8px 24px rgba(0,0,0,0.5);
}

.license-dialog h3 {
    margin-bottom: 8px;
    font-size: 16px;
}

.license-dialog p {
    color: var(--text-secondary);
    font-size: 12px;
    margin-bottom: 12px;
}

.license-dialog label {
    display: block;
    font-size: 12px;
    color: var(--text-secondary);
    margin-bottom: 4px;
    margin-top: 8px;
}

.license-dialog input {
    width: 100%;
    padding: 6px 8px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    border-radius: 4px;
    font-size: 13px;
}

.license-dialog input:focus {
    outline: none;
    border-color: var(--accent);
}

.lic-error {
    color: #f44;
    font-size: 12px;
    min-height: 18px;
    margin-top: 8px;
}

.lic-buttons {
    display: flex;
    gap: 8px;
    margin-top: 12px;
    justify-content: flex-end;
}

.lic-buttons button {
    padding: 6px 16px;
    border-radius: 4px;
    border: 1px solid var(--border-color);
    cursor: pointer;
    font-size: 13px;
}

.lic-buttons #lic-activate {
    background: var(--accent);
    border-color: var(--accent);
    color: #fff;
}

.lic-buttons #lic-activate:hover {
    background: var(--accent-hover);
}

.lic-buttons #lic-cancel {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

.lic-buttons #lic-cancel:hover {
    background: var(--border-color);
}