/* ============================================================================
   STL STUDIO - CSS VARIABLES & DESIGN TOKENS
   Sistema de design responsivo para editor 3D
   ============================================================================ */

:root {
    /* === PALETA DE CORES === */
    /* Backgrounds */
    --bg-dark: #181818;          /* Fundo principal da aplicação */
    --bg-panel: #252525;         /* Painéis e cards */
    --bg-header: #303030;        /* Header e footer */
    --bg-hover: #3a3a3a;         /* Estado hover de elementos */
    --bg-input: #111111;         /* Inputs e viewport */
    
    /* Textos */
    --text-main: #f0f0f0;        /* Texto principal */
    --text-muted: #aaaaaa;       /* Texto secundário */
    --text-dark: #777777;        /* Texto terciário */
    
    /* Acentos */
    --accent: #ff9f0a;           /* Cor de destaque principal */
    --accent-hover: #ffb340;     /* Hover da cor de destaque */
    
    /* Bordas */
    --border: #444444;           /* Borda padrão */
    --border-light: #555555;     /* Borda clara */
    --border-dark: #333333;      /* Borda escura */
    
    /* === DIMENSÕES === */
    --header-height: 3rem;       /* Altura do header (48px) */
    --footer-height: 2rem;       /* Altura do footer (32px) */
    --toolbar-width: 3.25rem;    /* Largura da toolbar (52px) */
    --toolbar-btn-size: 2.25rem; /* Tamanho dos botões da toolbar (36px) */
    --toolbar-icon-size: .9rem; /* Tamanho dos ícones */
    
    /* === ESPAÇAMENTO === */
    --space-xs: 0.25rem;         /* 4px */
    --space-sm: 0.5rem;          /* 8px */
    --space-md: 0.75rem;         /* 12px */
    --space-lg: 1rem;            /* 16px */
    --space-xl: 1.25rem;         /* 20px */
    
    /* === BORDER RADIUS === */
    --radius-sm: 0.25rem;        /* 4px - Pequeno */
    --radius-md: 0.375rem;       /* 6px - Médio */
    --radius-lg: 0.5rem;         /* 8px - Grande */
    
    /* === TRANSIÇÕES === */
    --transition-fast: 0.1s;     /* Transição rápida */
    --transition-base: 0.2s;     /* Transição padrão */
    --transition-slow: 0.3s;     /* Transição lenta */
    
    /* === TIPOGRAFIA === */
    --font-xs: 0.6875rem;        /* 11px */
    --font-sm: 0.75rem;          /* 12px */
    --font-base: 0.8125rem;      /* 13px */
    --font-md: 0.875rem;         /* 14px */
    --font-lg: 1rem;             /* 16px */
    
    /* === Z-INDEX === */
    --z-toolbar: 10;
    --z-header: 20;
    --z-hole-tool: 78;
    --z-properties: 150;
    --z-notification: 200;
    --z-loader: 300;
    --z-tooltip: 1000;
    --z-modal: 2000;
    --app-viewport-height: 100vh;
}

@supports (height: 100dvh) {
    :root {
        --app-viewport-height: 100dvh;
    }
}

/* ============================================================================
   RESET E BASE
   ============================================================================ */

* {
    box-sizing: border-box;
    outline: none;
    -webkit-tap-highlight-color: transparent;
}

html {
    scrollbar-width: thin;
    scrollbar-color: var(--border) transparent;
}

*::-webkit-scrollbar {
    width: 0.5rem;
    height: 0.5rem;
}

*::-webkit-scrollbar-track {
    background: transparent;
}

*::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: var(--radius-md);
    border: 0.125rem solid transparent;
    background-clip: padding-box;
}

*::-webkit-scrollbar-thumb:hover {
    background: var(--accent);
    border-color: transparent;
}

body {
    margin: 0;
    padding: 0;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--bg-dark);
    color: var(--text-main);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    overflow-y: auto;
    overflow-x: hidden;
}

.skip-link {
    position: absolute;
    left: var(--space-lg);
    top: -3rem;
    background: var(--accent);
    color: var(--bg-input);
    padding: var(--space-sm) var(--space-md);
    border-radius: var(--radius-md);
    font-weight: 600;
    z-index: var(--z-header);
    transition: top var(--transition-base) ease;
}

.skip-link:focus-visible {
    top: var(--space-sm);
    outline: 0.125rem solid var(--bg-input);
    outline-offset: 0.125rem;
}

a:focus-visible {
    outline: 0.125rem solid var(--accent);
    outline-offset: 0.125rem;
}

/* ============================================================================
   HEADER - Barra superior com logo e controles
   ============================================================================ */

header {
    height: var(--header-height);
    background-color: var(--bg-header);
    border-bottom: 0.0625rem solid var(--border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 var(--space-lg);
    z-index: var(--z-header);
    flex-shrink: 0;
}

.brand {
    font-weight: 700;
    color: var(--accent);
    display: flex;
    align-items: center;
    gap: 0.625rem;
    font-size: var(--font-lg);
    letter-spacing: 0.03125rem;
}

.controls-group {
    display: flex;
    gap: 0.625rem;
    align-items: center;
}

/* ============================================================================
   BOTÕES - Estilos de botões reutilizáveis
   ============================================================================ */

.btn {
    background: var(--bg-panel);
    border: 0.0625rem solid var(--border);
    color: var(--text-main);
    padding: 0 0.875rem;
    height: 2rem;
    border-radius: var(--radius-md);
    cursor: pointer;
    font-size: var(--font-base);
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    transition: all var(--transition-base);
    font-weight: 500;
    position: relative;
    will-change: background-color, border-color, transform;
}

.btn:focus-visible {
    outline: 0.125rem solid var(--accent);
    outline-offset: 0.125rem;
    box-shadow: 0 0 0.625rem rgba(255, 159, 10, 0.35);
}

.btn:hover {
    background: var(--bg-hover);
    border-color: var(--border-light);
}

.btn:active {
    transform: translateY(0.0625rem);
}

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

/* Botão com cor de destaque */
.btn-primary {
    background: var(--accent);
    border-color: var(--accent);
    color: var(--bg-input);
    font-weight: 700;
}

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

.btn-danger {
    background: #dc3545;
    border-color: #dc3545;
    color: white;
}

.btn-danger:hover {
    background: #c82333;
    border-color: #c82333;
}

/* Botão circular apenas com ícone */
.btn-icon {
    padding: 0;
    width: 2rem;
    justify-content: center;
    border-radius: 50%;
}

#file-input {
    display: none;
}

/* ============================================================================
   DROPDOWN MENU - Menu suspenso
   ============================================================================ */

.dropdown {
    position: relative;
    display: inline-block;
}

.dropdown-content {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    background-color: var(--bg-panel);
    min-width: 11.25rem;
    box-shadow: 0 0.5rem 1rem rgba(0, 0, 0, 0.5);
    z-index: 99999;
    border: 0.0625rem solid var(--border);
    border-radius: var(--radius-md);
    margin-top: var(--space-xs);
    overflow: hidden;
}

/* Garantir que os dropdowns do header se alinhem à esquerda e não ultrapassem a tela */
header .controls-group .dropdown .dropdown-content {
    left: auto;
    right: 0;
}

.dropdown:hover .dropdown-content,
.dropdown:focus-within .dropdown-content {
    display: block;
}

.dropdown-item {
    padding: 0.625rem var(--space-md);
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.625rem;
    color: var(--text-muted);
    font-size: var(--font-base);
    transition: background var(--transition-base);
    will-change: background-color;
    border: none;
    background: none;
    width: 100%;
    text-align: left;
    font: inherit;
}

.dropdown-item:hover {
    background-color: var(--border);
    color: white;
}

.dropdown-item:focus-visible {
    outline: 0.125rem solid var(--accent);
    outline-offset: 0.125rem;
    background-color: var(--border);
    color: white;
}

.dropdown-item i {
    color: var(--accent);
    width: 0.875rem;
}

.dropdown-separator {
    height: 0.0625rem;
    background: var(--border);
    margin: var(--space-xs) 0;
}

/* Dropdown na toolbar */
.dropdown-toolbar {
    position: relative;
}

.dropdown-toolbar .dropdown-content {
    bottom: calc(100% + 0.5rem);
    top: auto;
    left: 50%;
    transform: translateX(-50%);
    min-width: 13rem;
}

.dropdown-toolbar .tool-btn {
    width: var(--toolbar-btn-size);
    height: var(--toolbar-btn-size);
}

/* ============================================================================
   WORKSPACE - Área de trabalho principal
   ============================================================================ */

#workspace {
    display: flex;
    flex: 1;
    position: relative;
    height: calc(var(--app-viewport-height) - var(--header-height) - var(--footer-height));
    min-height: calc(var(--app-viewport-height) - var(--header-height) - var(--footer-height));
}

/* ============================================================================
   TOOLBAR - Barra lateral de ferramentas
   ============================================================================ */

#toolbar {
    width: var(--toolbar-width);
    background: var(--bg-panel);
    border-right: 0.0625rem solid var(--border);
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: var(--space-md) 0;
    gap: var(--space-sm);
    z-index: var(--z-toolbar);
    overflow-y: auto;
    overflow-x: hidden;
    scrollbar-width: none;
    -ms-overflow-style: none;
}

#toolbar::-webkit-scrollbar {
    display: none;
}

.tool-btn {
    width: var(--toolbar-btn-size);
    height: var(--toolbar-btn-size);
    border-radius: var(--radius-md);
    border: none;
    background: transparent;
    color: var(--text-muted);
    cursor: pointer;
    display: flex;
    justify-content: center;
    align-items: center;
    transition: all var(--transition-base) ease;
    position: relative;
    flex-shrink: 0;
    will-change: background-color, color;
}

.tool-btn:focus-visible {
    outline: 0.125rem solid var(--accent);
    outline-offset: 0.125rem;
    background: rgba(255, 255, 255, 0.08);
    color: white;
}

.tool-btn:hover {
    background: rgba(255, 255, 255, 0.08);
    color: white;
}

.tool-btn.active {
    background: var(--accent);
    color: var(--bg-input);
    box-shadow: 0 0 0.75rem rgba(255, 159, 10, 0.4);
}

.tool-btn i {
    width: var(--toolbar-icon-size);
    height: var(--toolbar-icon-size);
}

/* Separadores na toolbar */
.sep {
    width: 1.5rem;
    height: 0.0625rem;
    background: var(--border);
    margin: var(--space-xs) 0;
    flex-shrink: 0;
}

.toolbar-separator {
    width: 0.0625rem;
    height: 1.25rem;
    background: var(--border);
    margin: 0 var(--space-xs);
}

/* ============================================================================
   VIEWPORT - Canvas de visualização 3D
   ============================================================================ */

#viewport {
    flex: 1;
    position: relative;
    background: var(--bg-input);
    overflow: hidden;
    cursor: default;
}

#viewport canvas {
    touch-action: none;
}

/* Estado vazio do viewport */
#empty-state {
    position: absolute;
    inset: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    pointer-events: none;
    color: var(--border-light);
    transition: opacity var(--transition-slow);
    text-align: center;
    padding: 0 var(--space-lg);
}

#empty-state i {
    opacity: 0.3;
}

#empty-state-text {
    margin-top: var(--space-lg);
    font-size: var(--font-md);
    font-weight: 500;
}

#empty-state .empty-hint {
    margin-top: var(--space-sm);
    color: var(--text-dark);
    font-size: var(--font-sm);
    max-width: 18rem;
    pointer-events: auto;
}

#empty-import-button {
    margin-top: var(--space-lg);
    pointer-events: auto;
}

/* Indicador de eixos 3D */
#axes-indicator {
    position: absolute;
    top: var(--space-lg);
    left: var(--space-lg);
    width: 7rem;
    height: 7rem;
    z-index: 100;
    pointer-events: none;
}

#axes-indicator canvas {
    display: block;
    width: 100%;
    height: 100%;
}

/* ============================================================================
   TOOLTIP - Dicas contextuais
   ============================================================================ */

#global-tooltip {
    position: fixed;
    background: var(--bg-input);
    color: white;
    padding: var(--space-sm) 0.625rem;
    border-radius: var(--radius-sm);
    font-size: var(--font-sm);
    white-space: nowrap;
    z-index: var(--z-tooltip);
    pointer-events: none;
    border: 0.0625rem solid var(--border);
    box-shadow: 0 0.25rem 0.75rem rgba(0, 0, 0, 0.5);
    opacity: 0;
    transition: opacity var(--transition-fast);
    left: 0;
    top: 0;
    will-change: opacity, left, top;
}

/* ============================================================================
   MODALS - Janelas modais
   ============================================================================ */

.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.7);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: var(--z-modal);
    backdrop-filter: blur(0.25rem);
}

.modal-box {
    background: var(--bg-panel);
    border: 0.0625rem solid var(--border);
    padding: 1.25rem;
    border-radius: var(--space-sm);
    width: 37.5rem;
    max-width: 90vw;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: 0 0.625rem 1.875rem rgba(0, 0, 0, 0.5);
    display: flex;
    flex-direction: column;
    gap: 0.9375rem;
}

.modal-box h3 {
    margin: 0;
    color: var(--text-main);
    font-size: var(--font-lg);
}

.modal-box input,
.modal-box select {
    background: var(--bg-input);
    border: 0.0625rem solid var(--border);
    color: white;
    padding: var(--space-sm);
    border-radius: var(--radius-sm);
    width: 100%;
}

.modal-buttons {
    display: flex;
    gap: 0.625rem;
    justify-content: flex-end;
    margin-top: 0.625rem;
}

.modal-box-wide {
    width: 31.25rem;
    max-width: 90vw;
}

.modal-box-wide h3 {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

/* ============================================================================
   SETTINGS - Configurações
   ============================================================================ */

.settings-section {
    margin-bottom: var(--space-lg);
}

.settings-label {
    display: block;
    font-size: var(--font-sm);
    color: var(--text-muted);
    margin-bottom: var(--space-sm);
    font-weight: 500;
}

.settings-hint {
    font-size: var(--font-xs);
    color: var(--text-muted);
    margin-top: var(--space-xs);
    line-height: 1.4;
}

.settings-label input[type="checkbox"] {
    margin-right: var(--space-sm);
}

.settings-label input[type="color"] {
    width: 100%;
    height: 2.5rem;
    border: 0.0625rem solid var(--border);
    border-radius: var(--radius-sm);
    background: var(--bg-input);
    cursor: pointer;
}

.settings-label input[type="color"]::-webkit-color-swatch-wrapper {
    padding: 0.25rem;
}

.settings-label input[type="color"]::-webkit-color-swatch {
    border: none;
    border-radius: 0.25rem;
}

.settings-row {
    display: flex;
    align-items: center;
    gap: 0.625rem;
}

.settings-row input[type="number"] {
    flex: 1;
}

.settings-row span {
    color: var(--text-muted);
    font-size: var(--font-md);
}

/* ============================================================================
   INFO SECTIONS - Seções de informação
   ============================================================================ */

.info-section {
    margin-bottom: 1.25rem;
    padding-bottom: var(--space-lg);
    border-bottom: 0.0625rem solid var(--border-dark);
}

.info-section:last-of-type {
    border-bottom: none;
    margin-bottom: 0;
    padding-bottom: 0;
}

.info-section a {
    color: var(--text-dark);
}

.info-section h4 {
    margin: 0 0 var(--space-md) 0;
    font-size: var(--font-base);
    color: var(--accent);
    font-weight: 600;
}

.info-section p {
    margin: var(--space-sm) 0;
    font-size: var(--font-base);
    line-height: 1.5;
}

.info-list {
    margin: 0;
    padding-left: 1.25rem;
    font-size: var(--font-base);
    line-height: 1.8;
}

.info-list li {
    margin-bottom: var(--space-xs);
}

/* Feature items - Descrição detalhada de ferramentas */
.feature-item {
    margin-bottom: var(--space-lg);
    padding: var(--space-md);
    background: var(--bg-hover);
    border-radius: var(--radius-md);
    border-left: 0.1875rem solid var(--accent);
}

.feature-item:last-child {
    margin-bottom: 0;
}

.feature-item strong {
    display: block;
    margin-bottom: var(--space-sm);
    font-size: var(--font-md);
    color: var(--accent);
    font-weight: 600;
}

.feature-item p {
    margin: var(--space-xs) 0;
    font-size: var(--font-sm);
    line-height: 1.6;
    color: var(--text-main);
}

.feature-example {
    margin-top: var(--space-sm) !important;
    padding: var(--space-sm);
    background: var(--bg-panel);
    border-radius: var(--radius-sm);
    font-size: var(--font-xs) !important;
    color: var(--text-muted) !important;
    font-style: italic;
    border-left: 0.125rem solid var(--border);
}

.feature-example em {
    color: var(--accent);
    font-weight: 600;
    font-style: normal;
}

/* Grid de atalhos do teclado */
.shortcuts-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(8.75rem, 1fr));
    gap: var(--space-sm);
}

.shortcut-item {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: var(--font-sm);
}

.shortcut-item kbd {
    background: var(--border-dark);
    border: 0.0625rem solid var(--border-light);
    border-radius: var(--radius-sm);
    padding: var(--space-xs) var(--space-sm);
    font-family: monospace;
    font-size: var(--font-xs);
    min-width: 2rem;
    text-align: center;
    box-shadow: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.3);
}

/* ============================================================================
   DEFORM PANEL - Painel de deformação de modelos
   ============================================================================ */

.deform-control {
    margin-bottom: var(--space-sm);
}

.deform-label-inline {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-sm);
    font-size: var(--font-sm);
    color: var(--text-muted);
}

.deform-value {
    color: var(--accent);
    font-weight: 600;
    min-width: 3rem;
    text-align: right;
    font-family: monospace;
    font-size: var(--font-md);
}

.deform-actions {
    display: flex;
    gap: var(--space-sm);
    margin-top: var(--space-sm);
}

.deform-actions .btn {
    flex: 1;
}

/* Sliders customizados */
.deform-slider {
    width: 100%;
    height: 2rem;
    -webkit-appearance: none;
    appearance: none;
    background: transparent;
    cursor: pointer;
}

.deform-slider::-webkit-slider-track {
    width: 100%;
    height: 0.375rem;
    background: var(--bg-input);
    border: 0.0625rem solid var(--border);
    border-radius: var(--radius-md);
}

.deform-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 1.25rem;
    height: 1.25rem;
    background: var(--accent);
    border-radius: 50%;
    cursor: grab;
    margin-top: -0.4375rem;
    box-shadow: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.3);
    transition: transform var(--transition-fast);
}

.deform-slider::-webkit-slider-thumb:hover {
    transform: scale(1.15);
}

.deform-slider::-webkit-slider-thumb:active {
    cursor: grabbing;
    transform: scale(1.05);
}

.deform-slider::-moz-range-track {
    width: 100%;
    height: 0.375rem;
    background: var(--bg-input);
    border: 0.0625rem solid var(--border);
    border-radius: var(--radius-md);
}

.deform-slider::-moz-range-thumb {
    width: 1.25rem;
    height: 1.25rem;
    background: var(--accent);
    border: none;
    border-radius: 50%;
    cursor: grab;
    box-shadow: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.3);
    transition: transform var(--transition-fast);
}

.deform-slider::-moz-range-thumb:hover {
    transform: scale(1.15);
}

.deform-slider::-moz-range-thumb:active {
    cursor: grabbing;
    transform: scale(1.05);
}

.property-hint {
    font-size: var(--font-xs);
    color: var(--text-dark);
    font-style: italic;
    line-height: 1.3;
}

/* ============================================================================
   FOOTER - Rodapé com informações e links
   ============================================================================ */

footer {
    height: var(--footer-height);
    background: var(--bg-header);
    border-top: 0.0625rem solid var(--border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 var(--space-lg);
    padding-bottom: calc(var(--space-xs) + constant(safe-area-inset-bottom));
    padding-bottom: calc(var(--space-xs) + env(safe-area-inset-bottom));
    font-size: var(--font-xs);
    color: var(--text-muted);
    flex-shrink: 0;
    z-index: var(--z-header);
}

.footer-left {
    display: flex;
    gap: 0.625rem;
    align-items: center;
}

.footer-right {
    display: flex;
    gap: 1.25rem;
}

.footer-link {
    color: var(--text-muted);
    text-decoration: none;
    transition: color var(--transition-base);
}

.footer-link:hover {
    color: var(--accent);
}

.footer-link:focus-visible {
    outline: 0.125rem solid var(--accent);
    outline-offset: 0.125rem;
    color: var(--accent);
}

#stats-info {
    margin-left: 0.9375rem;
    color: var(--text-dark);
}

/* ============================================================================
   NOTIFICATIONS & LOADERS - Feedback visual para o usuário
   ============================================================================ */

/* Notificação toast flutuante */
#notification {
    position: absolute;
    bottom: 3.125rem;
    left: 50%;
    transform: translateX(-50%);
    background: var(--accent);
    color: var(--bg-input);
    padding: 0.625rem 1.25rem;
    border-radius: 1.875rem;
    font-size: var(--font-base);
    font-weight: 700;
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--transition-slow);
    z-index: var(--z-notification);
    box-shadow: 0 0.25rem 0.9375rem rgba(0, 0, 0, 0.3);
}

/* Overlay de carregamento */
#loader-overlay {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.85);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: var(--z-loader);
    flex-direction: column;
    color: white;
    backdrop-filter: blur(0.25rem);
}

.spinner {
    width: 2.5rem;
    height: 2.5rem;
    border: 0.1875rem solid var(--border-dark);
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    margin-bottom: var(--space-lg);
}

.spinner-text {
    font-weight: 500;
    letter-spacing: 0.03125rem;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

/* ============================================================================
   PROPERTIES PANEL - Painel de propriedades dos objetos 3D
   Responsivo: Mobile-first (bottom) -> Desktop (lateral direita)
   ============================================================================ */

.panel {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: var(--bg-panel);
    border-top: 0.0625rem solid var(--border);
    box-shadow: 0 -0.25rem 0.75rem rgba(0, 0, 0, 0.3);
    display: flex;
    flex-direction: column;
    z-index: var(--z-properties);
    max-height: 50vh;
    transition: transform var(--transition-slow) ease, opacity var(--transition-slow) ease;
    width: 100%;
    box-sizing: border-box;
    will-change: transform, opacity;
}

@media (min-width: 769px) {
    .panel {
        max-height: 60vh;
    }
}

.panel.hidden {
    display: none;
}

.panel.collapsed .properties-content {
    display: none;
}

/* Cabeçalho do painel */
.properties-header {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-md) var(--space-lg);
    background: var(--border-dark);
    border-bottom: 0.0625rem solid var(--border);
    cursor: pointer;
    user-select: none;
}

.properties-toggle {
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    padding: var(--space-xs);
    display: flex;
    align-items: center;
    transition: transform var(--transition-slow) ease;
}

.panel.collapsed .properties-toggle {
    transform: rotate(-90deg);
}

.properties-title {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: var(--font-base);
    font-weight: 600;
    color: var(--text-main);
    flex: 1;
}

.properties-close {
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    padding: var(--space-xs);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    transition: background var(--transition-base), color var(--transition-base);
}

.properties-close:hover {
    background: var(--border);
    color: var(--text-main);
}

/* Conteúdo do painel */
.properties-content {
    overflow-y: auto;
    overflow-x: hidden;
    padding: var(--space-md) var(--space-lg);
    flex: 1;
    width: 100%;
    box-sizing: border-box;
}

.properties-content::-webkit-scrollbar {
    width: 0.375rem;
}

.properties-content::-webkit-scrollbar-track {
    background: var(--bg-panel);
}

.properties-content::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 0.1875rem;
}

.properties-content::-webkit-scrollbar-thumb:hover {
    background: var(--border-light);
}

/* Grupos de propriedades */
.property-group {
    margin-bottom: var(--space-lg);
    width: 100%;
    box-sizing: border-box;
}

.property-group:last-child {
    margin-bottom: 0;
}

.property-group-title {
    font-size: var(--font-xs);
    font-weight: 600;
    text-transform: uppercase;
    color: var(--text-muted);
    margin-bottom: var(--space-sm);
    letter-spacing: 0.03125rem;
}

/* Grid de inputs de propriedades */
.property-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: var(--space-md);
    margin-bottom: var(--space-sm);
    width: 100%;
    box-sizing: border-box;
}

.property-input-group {
    display: grid;
    grid-template-columns: auto 1fr;
    align-items: center;
    gap: var(--space-sm);
    width: 100%;
    box-sizing: border-box;
}

.property-input-group.full-width {
    grid-column: 1 / -1;
}

.property-input-group label {
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-sm);
    color: var(--text-dark);
    font-weight: 500;
    white-space: nowrap;
}

.property-input-group.full-width label {
    justify-content: flex-start;
}

.property-input-group.full-width input {
    width: 100%;
}

.property-input-group input[type="number"] {
    width: 100%;
    padding: var(--space-sm);
    background: var(--bg-input);
    border: 0.0625rem solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text-main);
    font-size: var(--font-base);
    font-family: 'Consolas', 'Monaco', monospace;
    transition: border-color var(--transition-base);
    box-sizing: border-box;
}

.property-input-group input[type="number"]:focus {
    outline: none;
    border-color: var(--accent);
}

/* Checkboxes */
.property-checkbox {
    margin-top: var(--space-xs);
}

.property-checkbox label {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: var(--font-sm);
    color: var(--text-main);
    cursor: pointer;
}

.property-checkbox input[type="checkbox"] {
    width: 1rem;
    height: 1rem;
    cursor: pointer;
}

/* Ações do objeto */
.property-actions {
    display: flex;
    gap: var(--space-sm);
    flex-wrap: wrap;
}

.btn-small {
    padding: var(--space-xs) var(--space-sm);
    height: 1.75rem;
    font-size: var(--font-sm);
    border-radius: var(--radius-sm);
}

/* Labels de eixos (X, Y, Z) */
.axis-label {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-sm);
    font-weight: 600;
    color: var(--text-dark);
    flex-shrink: 0;
}

/* ============================================================================
   DIMENSION LABELS - Labels de dimensões 3D (estilo CAD/Blender)
   ============================================================================ */

.dimension-label {
    position: absolute;
    background: rgba(0, 0, 0, 0.75);
    color: #ffffff;
    padding: 0.125rem 0.375rem;
    border-radius: 0.1875rem;
    font-size: 0.625rem;
    font-family: monospace;
    font-weight: 500;
    pointer-events: none;
    white-space: nowrap;
    border-left: 0.125rem solid var(--accent);
}

.dimension-line {
    position: absolute;
    pointer-events: none;
}

.dimension-arrow {
    fill: var(--accent);
}

/* ============================================================================
   HOLE TOOL - Ferramenta de criação de furos
   ============================================================================ */

.hole-point {
    position: absolute;
    width: 0.5rem;
    height: 0.5rem;
    background: var(--accent);
    border: 0.125rem solid #fff;
    border-radius: 50%;
    transform: translate(-50%, -50%);
    pointer-events: none;
    z-index: calc(var(--z-hole-tool) + 2);
    box-shadow: 0 0.125rem 0.375rem rgba(0, 0, 0, 0.5);
}

.hole-line {
    position: absolute;
    background: var(--accent);
    height: 0.125rem;
    transform-origin: left center;
    pointer-events: none;
    z-index: calc(var(--z-hole-tool) + 1);
    opacity: 0.8;
}

.hole-polygon {
    position: absolute;
    border: 0.125rem dashed var(--accent);
    background: rgba(255, 159, 10, 0.1);
    pointer-events: none;
    z-index: var(--z-hole-tool);
}

.hole-helper-text {
    position: absolute;
    bottom: 3.75rem;
    left: 50%;
    transform: translateX(-50%);
    background: rgba(0, 0, 0, 0.9);
    color: #fff;
    padding: 0.625rem 1rem;
    border-radius: var(--radius-md);
    font-size: var(--font-sm);
    z-index: 100;
    pointer-events: none;
    border: 0.0625rem solid var(--accent);
}

/* ============================================================================
   RULERS - Réguas e coordenadas (desabilitadas)
   ============================================================================ */

.ruler,
.ruler-horizontal,
.ruler-vertical,
.cursor-coords {
    display: none;
}

@media (max-width: 768px) {
    :root {
        --toolbar-width: 0;
    }
    
    /* Esconder textos em elementos pequenos */
    .brand span,
    .btn-text {
        display: none;
    }
    
    /* Workspace em coluna para mobile */
    #workspace {
        flex-direction: column;
    }
    
    /* Toolbar flutuante na parte inferior */
    #toolbar {
        width: auto;
        height: 3.25rem;
        flex-direction: row;
        position: absolute;
        bottom: calc(1.25rem + constant(safe-area-inset-bottom));
        bottom: calc(1.25rem + env(safe-area-inset-bottom));
        left: 50%;
        transform: translateX(-50%);
        background: rgba(37, 37, 37, 0.95);
        backdrop-filter: blur(0.625rem);
        border: 0.0625rem solid var(--border);
        border-radius: 1.625rem;
        padding: 0 var(--space-lg);
        gap: var(--space-md);
        box-shadow: 0 0.5rem 2rem rgba(0, 0, 0, 0.5);
        overflow-x: auto;
        overflow-y: hidden;
        max-width: calc(100vw - 1.7rem);
        scrollbar-width: none;
        -ms-overflow-style: none;
    }

    /* Scroll horizontal invisível */
    #toolbar::-webkit-scrollbar {
        display: none;
    }

    /* Esconder elementos não essenciais */
    .hidden-mobile {
        display: none !important;
    }
    
    .footer-right {
        display: none;
    }
}

/* ============================================================================
   RESPONSIVE - DESKTOP (min-width: 769px)
   Otimizações para telas maiores
   ============================================================================ */

@media (min-width: 769px) {
    /* Painel lateral direita para todos os painéis */
    .panel {
        position: absolute;
        top: 0.75rem;
        right: 0.75rem;
        bottom: auto;
        left: auto;
        width: 23rem;
        max-height: calc(var(--app-viewport-height) - 7.5rem);
        border: 0.0625rem solid var(--border);
        border-radius: var(--space-sm);
        z-index: 100;
        pointer-events: auto;
    }
    
    .panel.hidden {
        display: none;
    }
    
    /* Grid de propriedades em 3 colunas */
    .property-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    /* Inputs em coluna no desktop */
    .property-input-group {
        flex-direction: column;
        gap: var(--space-xs);
    }
    
    .property-input-group label {
        font-size: 0.625rem;
    }
}

/* ============================================================================
   LEGAL PAGES - Páginas de Termos e Privacidade
   Layout dedicado para documentação legal
   ============================================================================ */

.legal-workspace {
    padding: 0;
    background: var(--bg-dark);
}

/* Navegação da página legal */
.legal-nav {
    max-width: 75rem;
    margin: 0 auto;
    padding: 1.5rem 2rem 1rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.legal-breadcrumb {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-muted);
    font-size: 0.875rem;
}

.legal-breadcrumb span:last-child {
    color: var(--accent);
}

/* Container principal com sidebar + conteúdo */
.legal-container {
    max-width: 75rem;
    margin: 0 auto 3rem;
    padding: 0 2rem;
    display: grid;
    grid-template-columns: 15.625rem 1fr;
    gap: 2rem;
    align-items: start;
}

/* Sidebar com índice */
.legal-sidebar {
    position: sticky;
    top: 1rem;
}

.legal-toc {
    background: var(--bg-panel);
    border: 0.0625rem solid var(--border);
    border-radius: 0.5rem;
    padding: 1.5rem;
}

.legal-toc h4 {
    margin: 0 0 1rem;
    color: var(--text-main);
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.legal-toc a {
    display: block;
    color: var(--text-muted);
    text-decoration: none;
    padding: 0.5rem 0;
    font-size: 0.8125rem;
    border-left: 0.125rem solid transparent;
    padding-left: 0.75rem;
    margin-left: -0.75rem;
    transition: all var(--transition-fast);
}

.legal-toc a:hover {
    color: var(--accent);
    border-left-color: var(--accent);
    background: rgba(255, 159, 10, 0.05);
}

/* Conteúdo principal */
.legal-main {
    background: var(--bg-panel);
    border: 0.0625rem solid var(--border);
    border-radius: 0.5rem;
    padding: 2.5rem;
    min-height: 31.25rem;
}

/* Cabeçalho do documento */
.legal-header {
    text-align: center;
    margin-bottom: 3rem;
    padding-bottom: 2rem;
    border-bottom: 0.0625rem solid var(--border);
}

.legal-header h1 {
    font-size: 2.5rem;
    color: var(--text-main);
    margin: 0 0 0.5rem;
    font-weight: 700;
}

.legal-date {
    color: var(--text-muted);
    font-size: 0.875rem;
    margin: 0.5rem 0 0;
}

/* Alerta de atualização */
.legal-alert {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    background: rgba(255, 159, 10, 0.1);
    border-left: 0.1875rem solid var(--accent);
    padding: 1rem 1.25rem;
    border-radius: 0.25rem;
    margin-top: 1.5rem;
    text-align: left;
}

.legal-alert i {
    color: var(--accent);
    flex-shrink: 0;
    margin-top: 0.125rem;
}

.legal-alert span {
    color: var(--text-muted);
    font-size: 0.875rem;
    line-height: 1.5;
}

/* Conteúdo do documento */
.legal-content {
    color: var(--text-muted);
    line-height: 1.7;
}

.legal-content section {
    margin-bottom: 3rem;
    scroll-margin-top: 2rem;
}

.legal-content h2 {
    font-size: 1.75rem;
    color: var(--text-main);
    margin: 2.5rem 0 1.25rem;
    font-weight: 600;
    padding-bottom: 0.5rem;
    border-bottom: 0.125rem solid var(--border-dark);
}

.legal-content section:first-child h2 {
    margin-top: 0;
}

.legal-content h3 {
    font-size: 1.25rem;
    color: var(--text-main);
    margin: 1.75rem 0 1rem;
    font-weight: 600;
}

.legal-content p {
    margin-bottom: 1rem;
    color: var(--text-muted);
}

.legal-content ul,
.legal-content ol {
    padding-left: 1.75rem;
    margin-bottom: 1.25rem;
}

.legal-content li {
    margin-bottom: 0.625rem;
    color: var(--text-muted);
}

.legal-content strong {
    color: var(--text-main);
    font-weight: 600;
}

.legal-content a {
    color: var(--accent);
    text-decoration: none;
    border-bottom: 0.0625rem solid transparent;
    transition: border-color var(--transition-fast);
}

.legal-content a:hover {
    border-bottom-color: var(--accent);
}

.legal-content code {
    background: var(--bg-dark);
    padding: 0.125rem 0.375rem;
    border-radius: 0.1875rem;
    font-family: 'Courier New', monospace;
    font-size: 0.875em;
    color: var(--accent);
}

/* Tabelas */
.legal-table {
    width: 100%;
    border-collapse: collapse;
    margin: 1.5rem 0;
    background: var(--bg-dark);
    border-radius: 0.375rem;
    overflow: hidden;
}

.legal-table th {
    background: var(--bg-header);
    color: var(--text-main);
    padding: 0.875rem 1rem;
    text-align: left;
    font-weight: 600;
    font-size: 0.875rem;
    border-bottom: 0.0625rem solid var(--border);
}

.legal-table td {
    padding: 0.875rem 1rem;
    border-bottom: 0.0625rem solid var(--border-dark);
    font-size: 0.875rem;
}

.legal-table tbody tr:last-child td {
    border-bottom: none;
}

.legal-table tbody tr:hover {
    background: var(--bg-panel);
}

/* Caixa de contato */
.legal-contact-box {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    background: var(--bg-dark);
    border: 0.0625rem solid var(--border);
    border-radius: 0.375rem;
    padding: 1.25rem;
    margin: 1.5rem 0;
}

.legal-contact-box i {
    color: var(--accent);
    flex-shrink: 0;
}

.legal-contact-box strong {
    display: block;
    margin-bottom: 0.25rem;
}

.legal-contact-box small {
    color: var(--text-dark);
    font-size: 0.8125rem;
}

/* Link de voltar */
.back-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--accent);
    text-decoration: none;
    font-size: 0.875rem;
    padding: 0.5rem 0.75rem;
    border-radius: 0.25rem;
    transition: background var(--transition-fast);
}

.back-link:hover {
    background: rgba(255, 159, 10, 0.1);
}

/* Destaque de privacidade */
.privacy-highlight {
    background: rgba(255, 159, 10, 0.08);
    border: 0.0625rem solid rgba(255, 159, 10, 0.3);
    border-left: 0.25rem solid var(--accent);
    padding: 1.5rem;
    margin: 1.5rem 0;
    border-radius: 0.375rem;
    display: flex;
    align-items: flex-start;
    gap: 1rem;
}

.privacy-highlight i {
    color: var(--accent);
    flex-shrink: 0;
    margin-top: 0.25rem;
}

.privacy-highlight strong {
    color: var(--accent);
    display: block;
    margin-bottom: 0.5rem;
    font-size: 1rem;
}

.privacy-highlight p {
    margin: 0;
    color: var(--text-muted);
    font-size: 0.9375rem;
}

/* ============================================================================
   LEGAL PAGES - RESPONSIVE
   ============================================================================ */

/* Tablets */
@media (max-width: 1024px) {
    .legal-container {
        grid-template-columns: 1fr;
        gap: 0;
    }
    
    .legal-sidebar {
        display: none;
    }
    
    .legal-main {
        padding: 2rem;
    }
}

/* Mobile */
@media (max-width: 768px) {
    .legal-container {
        padding: 0 1rem;
        margin-bottom: 2rem;
    }
    
    .legal-nav {
        padding: 1rem;
        flex-direction: column;
        align-items: flex-start;
    }
    
    .legal-breadcrumb {
        width: 100%;
        order: -1;
    }
    
    .legal-main {
        padding: 1.5rem;
        border-radius: 0.375rem;
    }
    
    .legal-header h1 {
        font-size: 1.75rem;
    }
    
    .legal-content h2 {
        font-size: 1.375rem;
    }
    
    .legal-content h3 {
        font-size: 1.125rem;
    }
    
    .legal-table {
        font-size: 0.8125rem;
    }
    
    .legal-table th,
    .legal-table td {
        padding: 0.625rem 0.75rem;
    }
}