/* ==========================================================================
   VISUALIZADOR REVISTA (FLIPBOOK) — STYLE SHEET
   ========================================================================== */

/* Cores do Sistema de Design */
:root {
    --bg-warm-light: #f7f4ee;       /* Creme suave para fundo, reduz cansaço visual */
    --text-primary: #583722;        /* Tom marrom escuro característico do site */
    --text-secondary: #8a6245;      /* Marrom médio */
    --border-color: rgba(88, 55, 34, 0.12); /* Divisórias discretas */
    --btn-hover-bg: rgba(88, 55, 34, 0.05); /* Efeito hover nos botões */
    --shadow-soft: 0 10px 30px rgba(0, 0, 0, 0.08);
}

/* Reset e Estrutura Principal */
body.page-visualizador {
    margin: 0;
    padding: 0;
    width: 100vw;
    height: 100vh;
    background-color: var(--bg-warm-light);
    color: var(--text-primary);
    font-family: 'Source Sans 3', sans-serif;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    user-select: none;
    -webkit-user-select: none;
}

/* 1. BARRA DE CONTROLE SUPERIOR */
.visualizador-header {
    height: 64px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 2rem;
    background-color: var(--bg-warm-light);
    z-index: 10;
    box-sizing: border-box;
}

.visualizador-header .header-left,
.visualizador-header .header-right {
    flex: 1;
}

.visualizador-header .header-right {
    display: flex;
    justify-content: flex-end;
}

.visualizador-header .header-center {
    flex: 2;
    text-align: center;
}

/* Título do Documento */
.doc-title {
    font-family: 'Josefin Sans', sans-serif;
    font-size: 14px;
    font-weight: 600;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--text-secondary);
    margin: 0;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 450px;
    display: inline-block;
}

/* Botão Voltar e Fechar */
.btn-back, .btn-close {
    font-family: 'Josefin Sans', sans-serif;
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--text-primary);
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    height: 38px;
    padding: 0 1rem;
    border-radius: 4px;
    transition: background-color 0.3s ease, opacity 0.3s ease;
}

.btn-back i {
    font-size: 12px;
}

.btn-close {
    padding: 0;
    width: 38px;
    justify-content: center;
    border-radius: 50%;
}

.btn-close i {
    font-size: 18px;
}

.btn-back:hover, .btn-close:hover {
    background-color: var(--btn-hover-bg);
}

/* 2. ÁREA CENTRAL DO LIVRO */
.visualizador-main {
    flex: 1;
    height: calc(100vh - 128px);
    min-height: 0;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    padding: 0; /* PDF cobre a página inteira logo abaixo do cabeçalho */
    box-sizing: border-box;
}

/* Contêiner de Renderização do Livro */
.canvas-container {
    width: 100%;
    height: 100%;
    display: flex;
    overflow: hidden;
    position: relative;
}

#zoom-wrapper {
    position: relative;
    margin: auto;
}

#book-scaler {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    transform-origin: center center;
    transition: transform 0.15s ease;
}

/* Customização de Scrollbar para o Visualizador Zoomado */
.canvas-container::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}
.canvas-container::-webkit-scrollbar-track {
    background: var(--bg-warm-light);
}
.canvas-container::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 4px;
}
.canvas-container::-webkit-scrollbar-thumb:hover {
    background: var(--text-secondary);
}

.canvas-container.zoomed {
    cursor: grab;
    cursor: -webkit-grab;
}

.canvas-container.zoomed.grabbing {
    cursor: grabbing;
    cursor: -webkit-grabbing;
}

/* Elemento do Flipbook */
.book-viewport {
    box-shadow: var(--shadow-soft);
    background-color: #fff;
    transition: opacity 0.3s ease;
}

/* Embrulho da página */
.page-wrapper {
    background-color: #fff;
    width: 100%;
    height: 100%;
    overflow: hidden;
    position: relative;
}

/* Canvas da página do PDF */
.page-canvas {
    display: block;
    width: 100%;
    height: 100%;
    object-fit: contain;
}

/* Botões Flutuantes de Navegação Lateral (Desktop) */
.floating-nav-btn {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background-color: rgba(247, 244, 238, 0.9);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    font-size: 14px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background-color 0.3s ease, border-color 0.3s ease, opacity 0.3s ease;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
    z-index: 15; /* Fica acima das páginas */
}

.floating-nav-btn.prev {
    left: 20px;
}

.floating-nav-btn.next {
    right: 20px;
}

.floating-nav-btn:hover {
    background-color: var(--text-primary);
    color: var(--bg-warm-light);
    border-color: var(--text-primary);
}

/* 3. BARRA DE CONTROLES INFERIOR */
.visualizador-footer {
    height: 64px;
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 2rem;
    background-color: var(--bg-warm-light);
    z-index: 10;
    box-sizing: border-box;
}

.visualizador-footer .footer-left,
.visualizador-footer .footer-right {
    flex: 1;
}

.visualizador-footer .footer-left {
    display: flex;
    justify-content: flex-start;
}

.visualizador-footer .footer-right {
    display: flex;
    justify-content: flex-end;
}

.visualizador-footer .footer-center {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.zoom-controls {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.zoom-indicator {
    font-family: 'Josefin Sans', sans-serif;
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.05em;
    color: var(--text-secondary);
    min-width: 45px;
    text-align: center;
}

.controls-wrapper {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.control-btn {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: none;
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    transition: background-color 0.3s ease, border-color 0.3s ease, opacity 0.3s ease;
}

.control-btn:hover:not(:disabled) {
    background-color: var(--text-primary);
    border-color: var(--text-primary);
    color: var(--bg-warm-light);
}

.control-btn:disabled {
    opacity: 0.25;
    cursor: not-allowed;
}

.page-indicator {
    font-family: 'Josefin Sans', sans-serif;
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 0.08em;
    color: var(--text-secondary);
    min-width: 140px;
    text-align: center;
}

/* 4. TELA DE CARREGAMENTO (LOADER) */
.loader-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background-color: var(--bg-warm-light);
    z-index: 100;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: opacity 0.4s ease;
}

.loader-content {
    text-align: center;
}

.spinner {
    width: 44px;
    height: 44px;
    border: 3px solid rgba(88, 55, 34, 0.1);
    border-top: 3px solid var(--text-primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto 1.5rem auto;
}

.loader-text {
    font-family: 'Josefin Sans', sans-serif;
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 0.1em;
    color: var(--text-primary);
    text-transform: uppercase;
    margin: 0;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* 5. AJUSTES RESPONSIVOS (MOBILE/TABLET) */
@media (max-width: 900px) {
    .floating-nav-btn {
        width: 38px;
        height: 38px;
        font-size: 12px;
    }
    .floating-nav-btn.prev {
        left: 8px;
    }
    .floating-nav-btn.next {
        right: 8px;
    }
}

@media (max-width: 600px) {
    .visualizador-header {
        padding: 0 1rem;
    }
    
    .doc-title {
        font-size: 11px;
        max-width: 180px;
    }
    
    .btn-back {
        padding: 0 0.5rem;
        font-size: 10px;
    }
    
    .visualizador-main {
        padding: 10px;
    }
    
    .page-indicator {
        font-size: 11px;
        min-width: 110px;
    }

    .visualizador-footer {
        padding: 0 1rem;
        gap: 0.5rem;
    }
    
    .visualizador-footer .footer-left {
        display: none;
    }
    
    .visualizador-footer .footer-center {
        flex: 2;
        justify-content: center;
        gap: 0.75rem;
    }
    
    .visualizador-footer .footer-right {
        flex: 1;
        justify-content: flex-end;
    }
    
    .zoom-controls {
        gap: 0.5rem;
    }
    
    .zoom-indicator {
        min-width: 35px;
        font-size: 10px;
    }
    
    .control-btn {
        width: 32px;
        height: 32px;
    }
}