/* ============================================
   TracerWebApp - Dark Modern Theme
   ============================================ */

/* CSS Variables */
:root {
    /* Colors - Dark Theme */
    --bg-primary: #0d1117;
    --bg-secondary: #161b22;
    --bg-tertiary: #21262d;
    --bg-hover: #30363d;
    
    --border-primary: #30363d;
    --border-secondary: #21262d;
    
    --text-primary: #e6edf3;
    --text-secondary: #8b949e;
    --text-muted: #6e7681;
    
    --accent-blue: #58a6ff;
    --accent-blue-hover: #79c0ff;
    --accent-green: #3fb950;
    --accent-green-hover: #56d364;
    --accent-red: #f85149;
    --accent-red-hover: #ff7b72;
    --accent-orange: #d29922;
    --accent-purple: #a371f7;
    --accent-blue-soft: rgba(88, 166, 255, 0.16);
    --accent-blue-border: rgba(88, 166, 255, 0.4);
    --accent-blue-hover-soft: rgba(88, 166, 255, 0.24);
    --accent-blue-focus: rgba(88, 166, 255, 0.2);
    --accent-blue-gradient-start: rgba(88, 166, 255, 0.1);
    --accent-blue-gradient-end: rgba(88, 166, 255, 0.05);
    --accent-orange-gradient-start: rgba(210, 153, 34, 0.1);
    --accent-orange-gradient-end: rgba(210, 153, 34, 0.05);
    --accent-orange-border: rgba(210, 153, 34, 0.3);
    --accent-purple-gradient-start: rgba(163, 113, 247, 0.1);
    --accent-purple-gradient-end: rgba(163, 113, 247, 0.05);
    --accent-purple-border: rgba(163, 113, 247, 0.3);
    --accent-red-soft: rgba(248, 81, 73, 0.1);
    --accent-green-soft: rgba(63, 185, 80, 0.1);
    --toolbar-image-icon-filter: none;
    
    /* Shape colors */
    --shape-right: rgba(88, 166, 255, 0.6);
    --shape-right-stroke: #58a6ff;
    --shape-left: rgba(248, 81, 73, 0.6);
    --shape-left-stroke: #f85149;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.5);
    
    /* Spacing */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    
    /* Border radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    
    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.25s ease;
    color-scheme: dark;
}

:root[data-theme='light'] {
    --bg-primary: #ffffff;
    --bg-secondary: #f6f8fa;
    --bg-tertiary: #eaeef2;
    --bg-hover: #d8dee4;
    
    --border-primary: #d0d7de;
    --border-secondary: #e1e4e8;
    
    --text-primary: #1f2328;
    --text-secondary: #656d76;
    --text-muted: #8c959f;
    
    --accent-blue: #0969da;
    --accent-blue-hover: #0550ae;
    --accent-green: #1a7f37;
    --accent-green-hover: #116329;
    --accent-red: #cf222e;
    --accent-red-hover: #a40e26;
    --accent-orange: #9a6700;
    --accent-purple: #8250df;
    --accent-blue-soft: rgba(9, 105, 218, 0.12);
    --accent-blue-border: rgba(9, 105, 218, 0.28);
    --accent-blue-hover-soft: rgba(9, 105, 218, 0.18);
    --accent-blue-focus: rgba(9, 105, 218, 0.16);
    --accent-blue-gradient-start: rgba(9, 105, 218, 0.1);
    --accent-blue-gradient-end: rgba(9, 105, 218, 0.04);
    --accent-orange-gradient-start: rgba(154, 103, 0, 0.12);
    --accent-orange-gradient-end: rgba(154, 103, 0, 0.05);
    --accent-orange-border: rgba(154, 103, 0, 0.24);
    --accent-purple-gradient-start: rgba(130, 80, 223, 0.12);
    --accent-purple-gradient-end: rgba(130, 80, 223, 0.05);
    --accent-purple-border: rgba(130, 80, 223, 0.24);
    --accent-red-soft: rgba(207, 34, 46, 0.1);
    --accent-green-soft: rgba(26, 127, 55, 0.1);
    --toolbar-image-icon-filter: invert(1);
    
    --shape-right: rgba(9, 105, 218, 0.28);
    --shape-right-stroke: #0969da;
    --shape-left: rgba(207, 34, 46, 0.28);
    --shape-left-stroke: #cf222e;
    
    --shadow-sm: 0 1px 2px rgba(31, 35, 40, 0.08);
    --shadow-md: 0 4px 10px rgba(31, 35, 40, 0.12);
    --shadow-lg: 0 12px 28px rgba(31, 35, 40, 0.18);
    color-scheme: light;
}

:root[data-theme='auto'] {
    color-scheme: light dark;
}

@media (prefers-color-scheme: light) {
    :root[data-theme='auto'] {
        --bg-primary: #ffffff;
        --bg-secondary: #f6f8fa;
        --bg-tertiary: #eaeef2;
        --bg-hover: #d8dee4;
        
        --border-primary: #d0d7de;
        --border-secondary: #e1e4e8;
        
        --text-primary: #1f2328;
        --text-secondary: #656d76;
        --text-muted: #8c959f;
        
        --accent-blue: #0969da;
        --accent-blue-hover: #0550ae;
        --accent-green: #1a7f37;
        --accent-green-hover: #116329;
        --accent-red: #cf222e;
        --accent-red-hover: #a40e26;
        --accent-orange: #9a6700;
        --accent-purple: #8250df;
        --accent-blue-soft: rgba(9, 105, 218, 0.12);
        --accent-blue-border: rgba(9, 105, 218, 0.28);
        --accent-blue-hover-soft: rgba(9, 105, 218, 0.18);
        --accent-blue-focus: rgba(9, 105, 218, 0.16);
        --accent-blue-gradient-start: rgba(9, 105, 218, 0.1);
        --accent-blue-gradient-end: rgba(9, 105, 218, 0.04);
        --accent-orange-gradient-start: rgba(154, 103, 0, 0.12);
        --accent-orange-gradient-end: rgba(154, 103, 0, 0.05);
        --accent-orange-border: rgba(154, 103, 0, 0.24);
        --accent-purple-gradient-start: rgba(130, 80, 223, 0.12);
        --accent-purple-gradient-end: rgba(130, 80, 223, 0.05);
        --accent-purple-border: rgba(130, 80, 223, 0.24);
        --accent-red-soft: rgba(207, 34, 46, 0.1);
        --accent-green-soft: rgba(26, 127, 55, 0.1);
        --toolbar-image-icon-filter: invert(1);
        
        --shape-right: rgba(9, 105, 218, 0.28);
        --shape-right-stroke: #0969da;
        --shape-left: rgba(207, 34, 46, 0.28);
        --shape-left-stroke: #cf222e;
        
        --shadow-sm: 0 1px 2px rgba(31, 35, 40, 0.08);
        --shadow-md: 0 4px 10px rgba(31, 35, 40, 0.12);
        --shadow-lg: 0 12px 28px rgba(31, 35, 40, 0.18);
        color-scheme: light;
    }
}

/* Reset & Base */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Noto Sans', Helvetica, Arial, sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.5;
    min-height: 100vh;
}

/* App Container */
.app-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--spacing-md);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Header */
.app-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    padding: var(--spacing-md) var(--spacing-lg);
    background: var(--bg-secondary);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-lg);
    gap: var(--spacing-lg);
}

.app-title {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
    letter-spacing: -0.02em;
    flex: 0 1 auto;
    min-width: 0;
}

/* Header Toolbar */
.header-toolbar {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-lg);
    flex: 1;
    min-width: 0;
}

.header-toolbar-spacer {
    width: var(--spacing-xl);
    flex: 0 0 var(--spacing-xl);
}

.header-toolbar .toolbar-group {
    flex-wrap: nowrap;
    gap: var(--spacing-sm);
}

.header-toolbar-action {
    width: 56px;
    height: 56px;
}

.header-toolbar-action.active {
    background: var(--accent-blue-soft);
    border-color: var(--accent-blue-border);
    color: var(--accent-blue-hover);
}

.toolbar-image-icon {
    width: 100%;
    height: 100%;
    object-fit: contain;
    border-radius: calc(var(--radius-lg) - 2px);
    display: block;
    filter: var(--toolbar-image-icon-filter);
}

/* Connection Status */
.connection-status {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--bg-tertiary);
    border-radius: var(--radius-md);
    flex-shrink: 0;
}

.status-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    animation: pulse 2s infinite;
}

.status-dot.disconnected {
    background: var(--text-muted);
    animation: none;
}

.status-dot.connecting {
    background: var(--accent-orange);
}

.status-dot.connected {
    background: var(--accent-green);
}

.status-dot.error {
    background: var(--accent-red);
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.status-text {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

/* Masks (Sections) */
.mask {
    display: none;
    flex: 1;
}

.mask.active {
    display: block;
    animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Configuration Panel */
.config-panel {
    background: var(--bg-secondary);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
}

.section-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-md);
    border-bottom: 1px solid var(--border-primary);
}

.subsection-title {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin: var(--spacing-lg) 0 var(--spacing-md);
}

/* Connection Settings */
.connection-settings {
    margin-top: var(--spacing-md);
    padding: var(--spacing-lg);
    background: var(--bg-tertiary);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-secondary);
}

.connection-settings.hidden {
    display: none;
}

/* Tracer Settings */
.tracer-settings {
    margin-top: var(--spacing-xl);
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--border-primary);
}

.settings-group {
    margin-top: var(--spacing-lg);
    padding: var(--spacing-md) var(--spacing-lg) var(--spacing-lg);
    background: var(--bg-tertiary);
    border: 1px solid var(--border-secondary);
    border-radius: var(--radius-md);
}

.settings-group legend {
    padding: 0 var(--spacing-sm);
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-secondary);
}

.checkbox-group {
    margin-bottom: 0;
}

.checkbox-control {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    cursor: pointer;
}

.checkbox-control input {
    width: 16px;
    height: 16px;
    margin: 0;
    accent-color: var(--accent-blue);
}

/* Constraint Information */
.constraint-info {
    margin-bottom: var(--spacing-lg);
    padding: var(--spacing-md);
    background: linear-gradient(90deg, var(--accent-blue-gradient-start) 0%, var(--accent-blue-gradient-end) 100%);
    border: 1px solid var(--accent-blue-border);
    border-radius: var(--radius-md);
    animation: fadeInSlide 0.3s ease;
}

.constraint-info.warning {
    background: linear-gradient(90deg, var(--accent-orange-gradient-start) 0%, var(--accent-orange-gradient-end) 100%);
    border-color: var(--accent-orange-border);
}

.constraint-info.essilor {
    background: linear-gradient(90deg, var(--accent-purple-gradient-start) 0%, var(--accent-purple-gradient-end) 100%);
    border-color: var(--accent-purple-border);
}

@keyframes fadeInSlide {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.constraint-message {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.constraint-icon {
    font-size: 1.125rem;
    line-height: 1;
}

.constraint-text {
    font-size: 0.875rem;
    color: var(--text-secondary);
    line-height: 1.4;
}

.constraint-info.warning .constraint-text {
    color: var(--accent-orange);
}

.constraint-info.essilor .constraint-text {
    color: var(--accent-purple);
}

/* Form Elements */
.form-group {
    margin-bottom: var(--spacing-md);
}

.form-row {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-md);
}

.form-group label {
    display: block;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xs);
}

.form-control {
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--bg-primary);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-size: 0.875rem;
    transition: border-color var(--transition-fast);
}

.form-control:focus {
    outline: none;
    border-color: var(--accent-blue);
    box-shadow: 0 0 0 3px var(--accent-blue-focus);
}

.form-control::placeholder {
    color: var(--text-muted);
}

select.form-control {
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%238b949e' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    padding-right: 36px;
}

/* Input with button (e.g., COM port select + List button) */
.input-with-button {
    display: flex;
    gap: var(--spacing-sm);
    align-items: center;
}

.input-with-button .form-control {
    flex: 1;
    min-width: 0;
}

.btn-sm {
    padding: var(--spacing-xs) var(--spacing-sm);
    font-size: 0.75rem;
    white-space: nowrap;
}

/* Form Actions */
.form-actions {
    margin-top: var(--spacing-xl);
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--border-primary);
    display: flex;
    justify-content: flex-end;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-lg);
    font-size: 0.875rem;
    font-weight: 500;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.btn-primary {
    background: var(--accent-blue);
    color: white;
}

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

.btn-success {
    background: var(--accent-green);
    color: white;
}

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

.btn-danger {
    background: var(--accent-red);
    color: white;
}

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

.btn-secondary {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border: 1px solid var(--border-primary);
}

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

.btn-large {
    padding: var(--spacing-md) var(--spacing-xl);
    font-size: 1rem;
}

.btn-icon {
    font-size: 1.25rem;
}

.toolbar-action {
    width: 72px;
    height: 72px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all var(--transition-fast);
    box-shadow: var(--shadow-sm);
}

.toolbar-action:hover {
    background: var(--bg-hover);
    transform: translateY(-1px);
}

.toolbar-action-primary {
    background: var(--accent-blue-soft);
    border-color: var(--accent-blue-border);
    color: var(--accent-blue-hover);
}

.toolbar-action-primary:hover {
    background: var(--accent-blue-hover-soft);
}

.toolbar-action-secondary {
    color: var(--text-secondary);
}

.toolbar-icon {
    width: 30px;
    height: 30px;
}

/* Tracer Panel */
.tracer-panel {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

/* Control Bar */
.control-bar {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-lg);
    background: var(--bg-secondary);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-lg);
}

.control-row {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
    gap: var(--spacing-md);
}

.control-row-actions {
    gap: var(--spacing-xl);
}

.control-row-confirm {
    margin-top: var(--spacing-xs);
}

.toolbar-group {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--spacing-md);
}

.toolbar-group-secondary {
    margin-left: var(--spacing-lg);
}

/* Disabled button state */
.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.toolbar-action:disabled {
    opacity: 0.45;
    cursor: not-allowed;
    transform: none;
    background: var(--bg-tertiary);
    color: var(--text-muted);
    border-color: var(--border-primary);
    box-shadow: none;
}

.toolbar-action:disabled:hover {
    background: var(--bg-tertiary);
}

.btn:disabled:hover {
    background: inherit;
}

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

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

/* Shape Display */
.shape-display {
    background: var(--bg-secondary);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
}

.shape-canvas-container {
    position: relative;
    width: 100%;
    aspect-ratio: 2 / 1;
    background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-tertiary) 100%);
    border-radius: var(--radius-md);
    overflow: hidden;
}

.shape-canvas {
    width: 100%;
    height: 100%;
}

.shape-canvas .placeholder-text {
    fill: var(--text-muted);
    font-size: 14px;
}

.modal-content.standard-shapes-content {
    width: 90vw;
    max-width: 90vw;
    max-height: 90vh;
}

.modal-content.help-content-layout {
    width: 92vw;
    max-width: 1200px;
    max-height: 90vh;
}

.standard-shapes-body {
    display: grid;
    grid-template-columns: minmax(320px, 1.15fr) minmax(280px, 0.85fr);
    gap: var(--spacing-lg);
}

.standard-shapes-gallery {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(170px, 1fr));
    gap: var(--spacing-md);
    max-height: 65vh;
    overflow-y: auto;
    padding-right: var(--spacing-xs);
}

.standard-shape-card {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    padding: var(--spacing-md);
    background: var(--bg-tertiary);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    cursor: pointer;
    transition: border-color var(--transition-fast), transform var(--transition-fast), box-shadow var(--transition-fast);
}

.standard-shape-card:hover {
    border-color: var(--accent-blue);
    transform: translateY(-1px);
}

.standard-shape-card.active {
    border-color: var(--accent-blue);
    box-shadow: 0 0 0 1px var(--accent-blue-border);
}

.standard-shape-card svg {
    width: 100%;
    aspect-ratio: 2 / 1;
    background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-tertiary) 100%);
    border-radius: var(--radius-sm);
}

.standard-shape-card-label {
    font-size: 0.875rem;
    font-weight: 600;
    text-align: center;
}

.standard-shapes-editor {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.standard-shape-preview-container {
    min-height: 240px;
}

.standard-shapes-form {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-md);
    padding: var(--spacing-lg);
}

.standard-shapes-inputs {
    grid-template-columns: repeat(3, minmax(0, 1fr));
}

.draw-shape-editor-panel {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.draw-shape-editor-container {
    min-height: 320px;
}

.draw-shape-editor-svg {
    background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-tertiary) 100%);
    touch-action: none;
    cursor: crosshair;
}

.draw-shape-handle {
    cursor: grab;
}

.draw-shape-hint {
    color: var(--text-muted);
    font-size: 0.875rem;
    line-height: 1.5;
}

.help-modal-body {
    display: grid;
    grid-template-columns: minmax(220px, 0.32fr) minmax(0, 1fr);
    gap: var(--spacing-lg);
}

.help-navigation {
    align-self: start;
    position: sticky;
    top: 0;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-md);
    padding: var(--spacing-lg);
}

.help-nav {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.help-nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    padding: var(--spacing-xs) 0;
    transition: color var(--transition-fast);
}

.help-nav-link:hover {
    color: var(--accent-blue);
}

.help-content {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.help-intro {
    margin: 0;
    color: var(--text-secondary);
    line-height: 1.6;
}

.help-section {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-md);
    padding: var(--spacing-lg);
}

.help-section-title {
    margin: 0 0 var(--spacing-md);
    font-size: 1rem;
    color: var(--text-primary);
}

.help-section p {
    margin: 0 0 var(--spacing-md);
    color: var(--text-secondary);
    line-height: 1.6;
}

.help-section p:last-child {
    margin-bottom: 0;
}

.help-section ul,
.help-section ol {
    margin: 0;
    padding-left: 1.25rem;
    color: var(--text-secondary);
}

.help-section ul:not(:first-child),
.help-section ol:not(:first-child) {
    margin-top: var(--spacing-md);
}

.help-section li + li {
    margin-top: var(--spacing-sm);
}

/* Shape labels are rendered dynamically in SVG by shape-renderer.js */

/* Properties Panel */
.properties-panel {
    background: var(--bg-secondary);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
}

.panel-title {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
}

.properties-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-md);
}

.property-group {
    background: var(--bg-tertiary);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
}

.property-row {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-xs) 0;
}

.property-row:not(:last-child) {
    border-bottom: 1px solid var(--border-secondary);
    padding-bottom: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
}

.property-label {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    min-width: 50px;
}

.property-value {
    font-family: 'SF Mono', 'Consolas', 'Liberation Mono', monospace;
    font-size: 0.875rem;
    color: var(--text-primary);
    min-width: 45px;
    text-align: right;
}

.property-value.single {
    flex: 1;
}

.property-separator {
    color: var(--text-muted);
}

.property-unit {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-left: auto;
}

/* Modal */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal.hidden {
    display: none;
}

.modal-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(4px);
}

.modal-content {
    position: relative;
    width: 90%;
    max-width: 500px;
    max-height: 80vh;
    background: var(--bg-secondary);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    display: flex;
    flex-direction: column;
    animation: modalSlideIn 0.3s ease;
}

@keyframes modalSlideIn {
    from {
        opacity: 0;
        transform: scale(0.95) translateY(-20px);
    }
    to {
        opacity: 1;
        transform: scale(1) translateY(0);
    }
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-lg);
    border-bottom: 1px solid var(--border-primary);
}

.modal-title {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-primary);
}

.modal-close {
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 0;
    line-height: 1;
    transition: color var(--transition-fast);
}

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

.modal-close.hidden {
    display: none;
}

.modal-body {
    flex: 1;
    padding: var(--spacing-lg);
    overflow-y: auto;
}

.modal-footer {
    padding: var(--spacing-lg);
    border-top: 1px solid var(--border-primary);
    display: flex;
    justify-content: center;
    gap: var(--spacing-sm);
}

/* Progress Log */
.progress-log {
    font-family: 'SF Mono', 'Consolas', 'Liberation Mono', monospace;
    font-size: 0.8125rem;
    line-height: 1.8;
    max-height: 300px;
    overflow-y: auto;
}

.progress-log::-webkit-scrollbar {
    width: 6px;
}

.progress-log::-webkit-scrollbar-track {
    background: var(--bg-tertiary);
    border-radius: 3px;
}

.progress-log::-webkit-scrollbar-thumb {
    background: var(--border-primary);
    border-radius: 3px;
}

.progress-entry {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-sm);
    padding: var(--spacing-xs) 0;
}

.progress-entry::before {
    content: '●';
    color: var(--accent-blue);
    font-size: 0.625rem;
    margin-top: 0.35em;
}

.progress-entry.error::before {
    color: var(--accent-red);
}

.progress-entry.success::before {
    color: var(--accent-green);
}

.progress-message {
    color: var(--text-secondary);
}

.progress-entry.error .progress-message {
    color: var(--accent-red);
}

.progress-entry.success .progress-message {
    color: var(--accent-green);
}

/* Modal States */
.modal.error .modal-header {
    background: var(--accent-red-soft);
    border-color: var(--accent-red);
}

.modal.error .modal-title {
    color: var(--accent-red);
}

.modal.success .modal-header {
    background: var(--accent-green-soft);
    border-color: var(--accent-green);
}

.modal.success .modal-title {
    color: var(--accent-green);
}

/* Hidden utility */
.hidden {
    display: none !important;
}

/* Responsive */
@media (max-width: 1024px) {
    .app-header {
        justify-content: center;
    }

    .app-title {
        flex-basis: 100%;
        text-align: center;
    }

    .header-toolbar {
        flex: 1 1 100%;
        flex-wrap: wrap;
    }

    .header-toolbar .toolbar-group {
        flex-wrap: wrap;
        justify-content: center;
    }

    .header-toolbar-spacer {
        display: none;
    }
}

@media (max-width: 768px) {
    .app-header {
        flex-direction: column;
        gap: var(--spacing-md);
    }

    .header-toolbar {
        flex-wrap: wrap;
        justify-content: center;
    }

    .header-toolbar .toolbar-group {
        flex-wrap: wrap;
        justify-content: center;
    }

    .header-toolbar-spacer {
        display: none;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }

    .toolbar-action {
        width: 64px;
        height: 64px;
    }

    .header-toolbar-action {
        width: 56px;
        height: 56px;
    }

    .toolbar-icon {
        width: 26px;
        height: 26px;
    }

    .toolbar-group-secondary {
        margin-left: 0;
    }
    
    .properties-grid {
        grid-template-columns: 1fr;
    }

    .standard-shapes-body {
        grid-template-columns: 1fr;
    }

    .help-modal-body {
        grid-template-columns: 1fr;
    }

    .help-navigation {
        position: static;
    }

    .standard-shapes-gallery {
        max-height: none;
    }

    .standard-shapes-inputs {
        grid-template-columns: 1fr;
    }
}