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

:root {
    --bg-primary: #1a1a1a;
    --bg-secondary: #242424;
    --bg-tertiary: #2d2d2d;
    --bg-hover: #333333;
    --border-color: #3d3d3d;
    --text-primary: #e0e0e0;
    --text-secondary: #a0a0a0;
    --text-muted: #707070;
    --accent-primary: #4a9eff;
    --accent-hover: #3a8eef;
    --danger: #ff4444;
    --danger-hover: #ff3333;
    --success: #44ff44;
    --warning: #ffaa44;
    --font-mono: 'Consolas', 'Monaco', 'Courier New', monospace;
    --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', sans-serif;
}

body {
    font-family: var(--font-sans);
    background: var(--bg-primary);
    color: var(--text-primary);
    overflow: hidden;
    height: 100vh;
}

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

.screen {
    display: flex;
    flex-direction: column;
    height: 100vh;
}

.screen.hidden {
    display: none;
}

.welcome-container,
.setup-container {
    max-width: 600px;
    margin: auto;
    padding: 40px;
    text-align: center;
}

.welcome-container h1 {
    font-size: 2.5rem;
    margin-bottom: 16px;
    color: var(--accent-primary);
}

.subtitle {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: 48px;
}

.features {
    display: flex;
    justify-content: center;
    gap: 32px;
    margin-bottom: 48px;
}

.feature {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
}

.feature .icon {
    font-size: 2rem;
}

.feature span:last-child {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.primary-btn {
    background: var(--accent-primary);
    color: white;
    border: none;
    padding: 12px 32px;
    font-size: 1rem;
    border-radius: 6px;
    cursor: pointer;
    font-weight: 500;
    transition: background 0.2s;
}

.primary-btn:hover {
    background: var(--accent-hover);
}

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

.primary-btn.small {
    padding: 8px 16px;
    font-size: 0.9rem;
}

.secondary-btn {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    padding: 12px 32px;
    font-size: 1rem;
    border-radius: 6px;
    cursor: pointer;
    font-weight: 500;
    transition: background 0.2s;
}

.secondary-btn:hover {
    background: var(--bg-hover);
}

.secondary-btn.small {
    padding: 8px 16px;
    font-size: 0.9rem;
}

.danger-btn {
    background: var(--danger);
    color: white;
    border: none;
    padding: 12px 32px;
    font-size: 1rem;
    border-radius: 6px;
    cursor: pointer;
    font-weight: 500;
    transition: background 0.2s;
}

.danger-btn:hover {
    background: var(--danger-hover);
}

.danger-btn.small {
    padding: 8px 16px;
    font-size: 0.9rem;
}

.setup-container h2 {
    font-size: 2rem;
    margin-bottom: 32px;
}

.form-group {
    margin-bottom: 24px;
    text-align: left;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: var(--text-secondary);
}

.form-group input[type="text"],
.form-group input[type="number"] {
    width: 100%;
    padding: 12px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    color: var(--text-primary);
    font-size: 1rem;
    font-family: var(--font-mono);
}

.form-group input:focus {
    outline: none;
    border-color: var(--accent-primary);
}

.form-group small {
    display: block;
    margin-top: 8px;
    color: var(--text-muted);
    font-size: 0.85rem;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.form-actions {
    display: flex;
    gap: 16px;
    justify-content: center;
    margin-top: 32px;
}

.app-header {
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    padding: 16px 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.header-left {
    display: flex;
    align-items: center;
    gap: 16px;
}

.project-title {
    font-size: 1.2rem;
    color: var(--accent-primary);
}

.project-name-display {
    font-family: var(--font-mono);
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.project-name-display::before {
    content: '[';
    color: var(--text-muted);
}

.project-name-display::after {
    content: ']';
    color: var(--text-muted);
}

.editor-container {
    display: grid;
    grid-template-columns: 400px 1fr;
    height: calc(100vh - 65px);
    overflow: hidden;
}

.left-panel {
    background: var(--bg-secondary);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.right-panel {
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.panel-header {
    padding: 16px 20px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.panel-header h3 {
    font-size: 1.1rem;
    font-weight: 600;
}

.header-actions {
    display: flex;
    gap: 8px;
}

.glyph-list {
    flex: 1;
    overflow-y: auto;
    padding: 12px;
}

.empty-state {
    text-align: center;
    padding: 48px 24px;
    color: var(--text-muted);
}

.empty-state p {
    font-size: 1.1rem;
    margin-bottom: 8px;
}

.glyph-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px;
    background: var(--bg-tertiary);
    border: 2px solid transparent;
    border-radius: 6px;
    margin-bottom: 8px;
    cursor: pointer;
    transition: all 0.2s;
}

.glyph-item:hover {
    background: var(--bg-hover);
}

.glyph-item.selected {
    border-color: var(--accent-primary);
    background: var(--bg-hover);
}

.glyph-item img {
    width: 32px;
    height: 32px;
    image-rendering: pixelated;
    background: repeating-conic-gradient(#2d2d2d 0% 25%, #242424 0% 50%) 50% / 8px 8px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
}

.glyph-item-info {
    flex: 1;
    min-width: 0;
}

.glyph-item-name {
    font-family: var(--font-mono);
    font-size: 0.9rem;
    font-weight: 500;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.glyph-item-meta {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: 2px;
}

.glyph-editor {
    border-top: 1px solid var(--border-color);
    padding: 20px;
    overflow-y: auto;
    max-height: 50vh;
}

.glyph-editor.hidden {
    display: none;
}

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

.editor-header h4 {
    font-size: 1rem;
    font-weight: 600;
}

.preview-section {
    margin-bottom: 24px;
    text-align: center;
}

.preview-section img {
    max-width: 128px;
    max-height: 128px;
    image-rendering: pixelated;
    background: repeating-conic-gradient(#2d2d2d 0% 25%, #242424 0% 50%) 50% / 16px 16px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 16px;
}

.image-info {
    margin-top: 12px;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.image-info span {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.warning {
    color: var(--warning) !important;
}

.unicode-info {
    display: flex;
    gap: 8px;
    align-items: stretch;
}

.unicode-display {
    flex: 1;
    padding: 12px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-family: var(--font-mono);
    font-size: 0.9rem;
    color: var(--text-primary);
    display: flex;
    flex-direction: column;
    gap: 4px;
    justify-content: center;
}

.unicode-display .unicode-char {
    font-size: 1.5rem;
    color: var(--accent-primary);
}

.unicode-display .unicode-code {
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.unicode-info button {
    padding: 8px 12px;
    font-size: 1.2rem;
}

.yaml-output {
    flex: 1;
    padding: 20px;
    background: var(--bg-secondary);
    color: var(--text-primary);
    font-family: var(--font-mono);
    font-size: 0.9rem;
    line-height: 1.6;
    overflow: auto;
    white-space: pre;
    margin: 0;
}

.toast {
    position: fixed;
    bottom: 24px;
    right: 24px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    padding: 16px 24px;
    border-radius: 6px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.5);
    z-index: 1000;
    transition: opacity 0.3s;
}

.toast.hidden {
    opacity: 0;
    pointer-events: none;
}

.toast.success {
    border-color: var(--success);
    color: var(--success);
}

.toast.error {
    border-color: var(--danger);
    color: var(--danger);
}

::-webkit-scrollbar {
    width: 12px;
    height: 12px;
}

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

::-webkit-scrollbar-thumb {
    background: var(--bg-tertiary);
    border-radius: 6px;
    border: 2px solid var(--bg-secondary);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--bg-hover);
}