/* =========================================================================
   Reset & Variáveis Globais (P&B minimalista / OS Retrô)
   ========================================================================= */
:root {
    --bg-desktop: #e5e5e5; /* Tom de cinza claro para o fundo "desktop" */
    --window-bg: #ffffff;
    --color-black: #000000;
    --color-white: #ffffff;
    --border-thickness: 2px;
    --shadow-offset: 6px;
}

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

body {
    background-color: var(--bg-desktop);
    /* Um padrão pontilhado hiper-sutil para o "desktop" */
    background-image: radial-gradient(var(--color-black) 1px, transparent 1px);
    background-size: 20px 20px;
    background-position: 0 0;
    
    color: var(--color-black);
    font-family: 'Space Mono', 'Courier New', Courier, monospace;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    overflow: hidden;
}

/* =========================================================================
   Navegação Superior (Barra estilo OS)
   ========================================================================= */
.top-nav {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 48px;
    background-color: var(--window-bg);
    border-bottom: var(--border-thickness) solid var(--color-black);
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 24px;
    z-index: 100;
}

.nav-left, .nav-right {
    display: flex;
    align-items: center;
    height: 100%;
}

.nav-left { gap: 24px; }
.nav-right { gap: 16px; }

.nav-link, .nav-user {
    text-decoration: none;
    color: var(--color-black);
    font-weight: 700;
    transition: color 0.2s, opacity 0.2s;
    display: flex;
    align-items: center;
}

.nav-link:hover, .nav-user:hover {
    opacity: 0.6;
}

.nav-link.active {
    text-decoration: underline;
    text-decoration-thickness: 2px;
    text-underline-offset: 4px;
}

.nav-link.small {
    font-size: 0.85rem;
    font-weight: 400;
}

.nav-link.small:hover {
    text-decoration: underline;
    text-decoration-thickness: 1px;
    text-underline-offset: 4px;
}

.nav-user {
    font-size: 0.95rem;
}

.nav-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    color: var(--color-black);
    transition: transform 0.2s ease;
}

.nav-icon:hover {
    transform: scale(1.1);
}

.nav-icon svg {
    width: 22px;
    height: 22px;
    fill: var(--color-black);
}

/* =========================================================================
   Container Principal (A Pasta / Janela)
   ========================================================================= */
.window-container {
    width: 90vw;
    height: 85vh;
    max-width: 1200px;
    background-color: var(--window-bg);
    border: var(--border-thickness) solid var(--color-black);
    display: flex;
    flex-direction: column;
    /* Sombra sólida retrô */
    box-shadow: var(--shadow-offset) var(--shadow-offset) 0px var(--color-black);
    position: relative;
    transition: all 0.3s ease-in-out;
}

/* =========================================================================
   Navegação (Abas)
   ========================================================================= */
.tabs-container {
    display: flex;
    border-bottom: var(--border-thickness) solid var(--color-black);
    background-color: var(--window-bg);
    overflow-x: auto;
    /* Ocultar barra de rolagem (Chrome/Safari) */
    scrollbar-width: none; /* Firefox */
    -ms-overflow-style: none;  /* IE and Edge */
}

.tabs-container::-webkit-scrollbar {
    display: none;
}

.tab {
    padding: 12px 24px;
    cursor: pointer;
    border-right: var(--border-thickness) solid var(--color-black);
    background-color: var(--window-bg);
    color: var(--color-black);
    font-weight: 700;
    font-size: 0.95rem;
    white-space: nowrap;
    user-select: none;
    letter-spacing: -0.5px;
    transition: background-color 0.15s, color 0.15s;
    
    /* Um pequeno detalhe para parecer "aba recortada" */
    position: relative;
}

.tab:hover {
    background-color: #f0f0f0;
}

/* Estado Ativo: Fundo preto, texto branco */
.tab.active {
    background-color: var(--color-black);
    color: var(--color-white);
}

/* Estado Desabilitado / Inativo */
.tab.disabled {
    color: #888;
    background-color: #f5f5f5;
    cursor: not-allowed;
}

.tab.disabled:hover {
    background-color: #f5f5f5;
}

.tab.working {
    color: #555;
    background-color: #ebebeb;
    cursor: pointer; /* Pode clicar para ver a tela de placeholder */
}

.tab.working:hover {
    background-color: #e0e0e0;
}

/* =========================================================================
   Área de Conteúdo (Iframe)
   ========================================================================= */
.content-area {
    flex: 1;
    position: relative;
    display: flex;
    background-color: var(--color-white);
    /* Garantir que o iframe não vaze pelas bordas */
    overflow: hidden; 
}

#project-viewer {
    width: 100%;
    height: 100%;
    background-color: transparent;
    display: block;
}

/* =========================================================================
   Controles (Botão de Tela Cheia)
   ========================================================================= */
.control-btn {
    position: absolute;
    bottom: 20px;
    right: 20px;
    width: 44px;
    height: 44px;
    background-color: var(--window-bg);
    border: var(--border-thickness) solid var(--color-black);
    cursor: pointer;
    display: flex;
    justify-content: center;
    align-items: center;
    box-shadow: 4px 4px 0px var(--color-black);
    transition: transform 0.1s, box-shadow 0.1s;
    z-index: 10;
}

/* Efeito de clique retrô */
.control-btn:active {
    transform: translate(2px, 2px);
    box-shadow: 2px 2px 0px var(--color-black);
}

.control-btn svg {
    width: 24px;
    height: 24px;
}

/* =========================================================================
   Estado de Tela Cheia (Fullscreen API ativa)
   ========================================================================= */
/* Quando o container entra em fullscreen nativo, podemos querer ajustar algumas coisas */
.window-container:fullscreen {
    width: 100vw;
    height: 100vh;
    max-width: none;
    border: none;
    box-shadow: none;
    border-radius: 0;
}

/* Fallbacks para outros navegadores */
.window-container:-webkit-full-screen {
    width: 100vw;
    height: 100vh;
    max-width: none;
    border: none;
    box-shadow: none;
}
.window-container:-moz-full-screen {
    width: 100vw;
    height: 100vh;
    max-width: none;
    border: none;
    box-shadow: none;
}

/* =========================================================================
   Responsividade (Mobile)
   ========================================================================= */
@media (max-width: 768px) {
    .top-nav {
        padding: 0 16px;
    }
    .nav-left { gap: 16px; }
    .nav-link { font-size: 0.9rem; }
    .nav-link.small { font-size: 0.8rem; }
    .nav-user { font-size: 0.85rem; }
    .nav-icon svg { width: 18px; height: 18px; }

    .window-container {
        width: 95vw;
        height: 85vh;
        box-shadow: 4px 4px 0px var(--color-black);
        margin-top: 48px; /* Ajuste para não conflitar muito com a top bar em resoluções minúsculas */
    }
    
    .tab {
        padding: 12px 16px;
        font-size: 0.85rem;
    }
    
    .control-btn {
        bottom: 15px;
        right: 15px;
        width: 38px;
        height: 38px;
    }
    
    .control-btn svg {
        width: 20px;
        height: 20px;
    }
}