/* --- Animação do Gradiente --- */
@keyframes moveGradient {
    0% {
        background-position: 0% 50%;
    }
    50% {
        background-position: 100% 100%;
    }
    100% {
        background-position: 0% 0%;
    }
}

/* --- Variáveis de Tema --- */
:root, html.theme-dark {
    /* Fundo */
    --bg-app: #000;
    --bg-gradient-start: #6D00D9;
    --bg-gradient-mid: #000;
    --bg-gradient-end: #330066;

    /* Texto */
    --text-primary: #f9f9f9;
    --text-secondary: #ccc;
    --text-placeholder: #888;
    --text-link: #AF7BFF;
    --text-on-primary: #ffffff;
    --text-on-primary-dark: #111;

    /* Cartões e Blocos */
    --card-bg: rgba(255, 255, 255, 0.05);
    --card-border: rgba(255, 255, 255, 0.1);
    --card-bg-hover: rgba(255, 255, 255, 0.15);
    --card-bg-nested: rgba(0, 0, 0, 0.1);

    /* Formulários e Inputs */
    --input-bg: rgba(255, 255, 255, 0.1);
    --input-border: rgba(255, 255, 255, 0.2);
    --input-bg-special: rgba(109, 0, 217, 0.2);
    --input-border-special: rgba(109, 0, 217, 0.5);

    /* Botões */
    --btn-primary-bg: #6D00D9;
    --btn-secondary-border: rgba(255, 255, 255, 0.3);
    --btn-accent-bg: #AF7BFF;
    --btn-fab-bg: #6D00D9;
    --btn-fab-icon: #f9f9f9;
    --btn-fab-open-bg: #f9f9f9;
    --btn-fab-open-icon: #333;
    --btn-danger-bg: rgba(244, 67, 54, 0.8);

    /* Navegação */
    --nav-bg: rgba(20, 20, 20, 0.8);
    --nav-border: rgba(255, 255, 255, 0.1);

    /* Semântico (Estes não mudam) */
    --color-entrada: #4CAF50;
    --color-saida: #F44336;
    --color-macho: #64B5F6;
    --color-femea: #F06292;
}

html.theme-light {
    /* Fundo */
    --bg-app: #f4f4f8;
    --bg-gradient-start: #d1c4e9;
    --bg-gradient-mid: #f4f4f8;
    --bg-gradient-end: #e1bee7;
    /* Texto */
    --text-primary: #1a1a1a;
    --text-secondary: #555;
    --text-placeholder: #777;
    --text-link: #6D00D9;
    --text-on-primary: #ffffff;
    --text-on-primary-dark: #111;
    /* Cartões e Blocos */
    --card-bg: #ffffff;
    --card-border: rgba(0, 0, 0, 0.1);
    --card-bg-hover: #f0f0f0;
    --card-bg-nested: #f9f9f9;
    /* Formulários e Inputs */
    --input-bg: #eeeeee;
    --input-border: #d0d0d0;
    --input-bg-special: rgba(109, 0, 217, 0.05);
    --input-border-special: rgba(109, 0, 217, 0.3);
    /* Botões */
    --btn-primary-bg: #6D00D9;
    --btn-secondary-border: rgba(0, 0, 0, 0.2);
    --btn-accent-bg: #AF7BFF;
    --btn-fab-bg: #6D00D9;
    --btn-fab-icon: #f9f9f9;
    --btn-fab-open-bg: #333;
    --btn-fab-open-icon: #f9f9f9;
    --btn-danger-bg: #F44336;
    /* Navegação */
    --nav-bg: rgba(255, 255, 255, 0.8);
    --nav-border: rgba(0, 0, 0, 0.1);
}

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

/* --- Estilo Base --- */
html, body {
    height: 100%;
    width: 100%;
    overflow: hidden;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    color: var(--text-primary);
    background-color: var(--bg-app);
    background-image: linear-gradient(-45deg, var(--bg-gradient-start), var(--bg-gradient-mid), var(--bg-gradient-end), var(--bg-app));
    background-size: 350% 350%;
    animation: moveGradient 15s ease infinite;
    transition: background-color 0.3s ease, color 0.3s ease;
}

/* --- Estrutura Principal --- */
body {
    display: flex;
    flex-direction: column;
}

/* --- Área de Conteúdo Principal --- */
#app-content {
    flex: 1;
    overflow-y: auto;
    padding: 20px;
    padding-bottom: 20px;
    -webkit-overflow-scrolling: touch;
    z-index: 1;
}

#app-content.with-nav {
    padding-bottom: 90px;
}

/* --- Páginas de Conteúdo --- */
.page {
    display: none;
    animation: fadeIn 0.3s ease;
    position: relative;
}
.page.active {
    display: block;
}

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

.page h1 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 20px;
}

/* --- Estilo Item Genérico --- */
.card-item {
    background: var(--card-bg);
    backdrop-filter: blur(5px);
    border-radius: 12px;
    padding: 15px;
    margin-bottom: 15px;
    border: 1px solid var(--card-border);
    animation: zoomIn 0.3s ease;
    transition: background-color 0.3s ease, border-color 0.3s ease;
}

@keyframes zoomIn {
    from {
        opacity: 0;
        transform: scale(0.9);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

/* --- Cores de Status (Semânticas) --- */
.entrada {
    color: var(--color-entrada) !important;
}
.saida {
    color: var(--color-saida) !important;
}
.sexo-macho {
    color: var(--color-macho) !important;
}
.sexo-femea {
    color: var(--color-femea) !important;
}

/* Classe de utilidade */
.hidden {
    display: none !important;
}

/* --- Estilos de Loader e Erro --- */
.loader-container, .error-container {
    padding: 30px;
    text-align: center;
    color: var(--text-secondary);
}
.loader {
    width: 30px;
    height: 30px;
    border: 4px solid var(--card-border);
    border-top-color: var(--text-link);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto 10px auto;
}
@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

/* --- Estilos restantes (Bovinos, Histórico, Login, etc...) --- */

/* Página Bovinos */
.filtro-container-bovinos {
    margin-bottom: 20px;
}
#filtro-brinco {
    width: 100%;
    background: var(--input-bg);
    border: 1px solid var(--input-border);
    border-radius: 8px;
    padding: 12px 15px;
    font-size: 1rem;
    color: var(--text-primary);
    font-family: inherit;
}
#filtro-brinco::placeholder {
    color: var(--text-placeholder);
}
#filtro-brinco::-webkit-search-decoration,
#filtro-brinco::-webkit-search-cancel-button,
#filtro-brinco::-webkit-search-results-button,
#filtro-brinco::-webkit-search-results-decoration {
    -webkit-appearance:none;
}
#lista-bovinos {
    padding: 0;
}
#msg-sem-itens-bovinos {
    display: none;
}
.bovino-familia-card {
    padding: 0;
    overflow: hidden;
    position: relative;
}
.bovino-pais-container {
    display: flex;
    background: var(--card-bg);
    position: relative;
}
.bovino-pais-container::after {
    content: '';
    position: absolute;
    left: 50%;
    bottom: 0;
    width: 2px;
    height: 20px;
    background-color: var(--input-border);
    transform: translateX(-50%);
}
.bovino-card {
    flex: 1;
    padding: 15px;
    display: flex;
    align-items: center;
    gap: 10px;
}
.bovino-card:first-child {
    border-right: 1px solid var(--card-border);
}
.bovino-card svg {
    width: 32px;
    height: 32px;
    stroke-width: 1.5;
    flex-shrink: 0;
}
.bovino-card-info h3 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
}
.bovino-card-info p {
    font-size: 0.85rem;
    color: var(--text-secondary);
    text-transform: uppercase;
}
.bovino-filhos-titulo {
    position: relative;
    font-size: 0.9rem;
    font-weight: 600;
    text-transform: uppercase;
    color: var(--text-secondary);
    padding: 10px 15px 5px 30px;
    margin-top: 20px;
}
.bovino-filhos-titulo::before {
    content: '';
    position: absolute;
    left: 15px;
    top: 0;
    width: calc(50% - 15px);
    height: 2px;
    background-color: var(--input-border);
}
.bovino-filhos-container {
    position: relative;
    padding: 0 15px 15px 30px;
    display: flex;
    flex-direction: column;
    gap: 10px;
}
.bovino-filhos-container::before {
    content: '';
    position: absolute;
    left: 15px;
    top: 0;
    bottom: 0;
    width: 2px;
    background-color: var(--input-border);
}
.bovino-card.filho {
    background: var(--card-bg-nested);
    border: 1px solid var(--card-border);
    border-radius: 8px;
    transition: background 0.2s ease;
    cursor: pointer;
    position: relative;
}
.bovino-card.filho::before {
    content: '';
    position: absolute;
    left: -15px;
    top: 50%;
    width: 15px;
    height: 2px;
    background-color: var(--input-border);
    transform: translateY(-50%);
}
.bovino-card.filho:active {
    background: var(--card-bg-hover);
}
.bovino-card.filho svg {
    width: 24px;
    height: 24px;
}

/* Página Histórico */
#saldo-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
    margin-bottom: 20px;
}
.saldo-card {
    background: var(--card-bg);
    backdrop-filter: blur(5px);
    border: 1px solid var(--card-border);
    border-radius: 12px;
    padding: 15px;
}
.saldo-card.total {
    grid-column: 1 / -1;
    background: var(--card-bg-hover);
}
.saldo-label {
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-bottom: 5px;
    text-transform: uppercase;
}
.saldo-valor {
    font-size: 1.4rem;
    font-weight: 700;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}
.saldo-card.total .saldo-valor {
    font-size: 1.6rem;
    font-weight: 700;
}
#filtros-historico {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
}
#filtros-historico input, #filtros-historico select {
    flex: 1;
    background: var(--input-bg);
    border: 1px solid var(--input-border);
    border-radius: 8px;
    padding: 10px;
    font-size: 0.9rem;
    color: var(--text-primary);
    font-family: inherit;
}
html.theme-dark #filtros-historico input[type="date"]::-webkit-calendar-picker-indicator {
    filter: invert(1);
}
#filtros-historico select#filtro-status {
    background-color: var(--input-bg-special);
    border-color: var(--input-border-special);
    appearance: none;
    -webkit-appearance: none;
    background-repeat: no-repeat;
    background-position: right 10px center;
    background-size: 16px;
}
html.theme-dark #filtros-historico select#filtro-status {
    background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 24 24' stroke-width='2' stroke='%23f9f9f9'><path stroke-linecap='round' stroke-linejoin='round' d='M19.5 8.25l-7.5 7.5-7.5-7.5'/></svg>");
}
html.theme-light #filtros-historico select#filtro-status {
    background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 24 24' stroke-width='2' stroke='%23333333'><path stroke-linecap='round' stroke-linejoin='round' d='M19.5 8.25l-7.5 7.5-7.5-7.5'/></svg>");
}
#filtros-historico select#filtro-status option {
    background-color: var(--bg-app);
    color: var(--text-primary);
}
.historico-item {
    cursor: pointer;
    transition: background 0.2s ease;
}
.historico-item:active {
    background: var(--card-bg-hover);
}
.historico-item-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 10px;
}
.historico-item-header div {
    flex: 1;
}
.historico-item-header p {
    font-size: 1.1rem;
    font-weight: 600;
    word-break: break-word;
    color: var(--text-primary);
}
.historico-item-header span.valor {
    font-size: 1.2rem;
    font-weight: 700;
    text-align: right;
    white-space: nowrap;
}
.historico-item-body {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.5;
    pointer-events: none;
}
.historico-item-body p {
    margin-bottom: 5px;
}
.historico-item-body p strong {
    color: var(--text-primary);
}
#msg-sem-itens-historico {
    display: none;
}

/* Botão Voltar */
.btn-voltar-pagina {
    display: inline-flex;
    align-items: center;
    background: none;
    border: none;
    color: var(--text-link);
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    padding: 5px 0;
    margin-bottom: 25px;
}
.btn-voltar-pagina svg {
    width: 20px;
    height: 20px;
    stroke: var(--text-link);
    stroke-width: 2.5;
    margin-right: 5px;
}

/* Página de Detalhes (Histórico) */
#page-detalhe {
    padding-bottom: 20px;
}
.detalhe-bloco {
    background: var(--card-bg);
    border-radius: 12px;
    padding: 15px;
    margin-bottom: 15px;
}
.detalhe-bloco .label {
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-bottom: 5px;
    text-transform: uppercase;
}
.detalhe-bloco .valor {
    font-size: 1.1rem;
    font-weight: 500;
    color: var(--text-primary);
    word-wrap: break-word;
}
.detalhe-bloco .valor.grande {
    font-size: 2rem;
    font-weight: 700;
}

/* ---  Estilos dos Anexos --- */
#anexo-botoes-container {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 10px;
}
.anexo-placeholder {
    font-size: 0.9rem;
    color: var(--text-secondary);
    font-style: italic;
}
.anexo-botao-carregar {
    background: var(--input-bg-special);
    border: 1px solid var(--input-border-special);
    color: var(--text-link);
    padding: 10px 15px;
    border-radius: 8px;
    cursor: pointer;
    font-weight: 500;
    font-family: inherit;
}
#anexo-viewer-container {
    margin-top: 15px;
    border-radius: 8px;
    overflow: hidden;
    display: none; /* Começa escondido */
}
.anexo-imagem-preview {
    width: 100%;
    height: auto;
    border-radius: 8px;
    object-fit: cover;
}
.anexo-pdf-embed {
    width: 100%;
    height: 400px;
    border: 1px solid var(--card-border);
}
/* --- Fim dos Estilos de Anexo --- */

/*  Estilos para Anexos (PDF/IMG) */
#detalhe-anexo-container {
    margin-top: 10px;
}
.anexo-imagem-preview {
    width: 100%;
    height: auto;
    border-radius: 8px;
    object-fit: cover;
}
.btn-anexo-download {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    background-color: var(--btn-accent-bg);
    color: var(--text-on-primary-dark);
    text-decoration: none;
    padding: 12px 15px;
    border-radius: 8px;
    font-weight: 600;
    text-align: center;
    transition: opacity 0.2s ease;
}
.btn-anexo-download:active {
    opacity: 0.8;
}
.btn-anexo-download svg {
    width: 20px;
    height: 20px;
    stroke: var(--text-on-primary-dark);
    stroke-width: 2;
}


#detalhe-imagem-container {
    margin-top: 20px;
}
#detalhe-imagem-container img {
    width: 100%;
    border-radius: 12px;
    object-fit: cover;
}
#detalhe-imagem-container p {
    color: var(--text-secondary);
    font-style: italic;
}

/* Página de Detalhes (Bovino) */
#page-detalhe-bovino h1 {
    font-size: 2rem;
    margin-bottom: 10px;
}
#detalhe-bovino-id {
    font-size: 1rem;
    color: var(--text-secondary);
    font-weight: 500;
    margin-bottom: 20px;
}
.detalhe-bovino-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 15px;
}
.detalhe-bloco.total-ganho-peso {
    background: rgba(76, 175, 80, 0.1);
    border-color: rgba(76, 175, 80, 0.3);
}
.detalhe-bloco.total-ganho-peso .valor {
    font-size: 1.8rem;
    font-weight: 700;
}
.label-com-acao {
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.btn-editar-inline {
    background: none;
    border: none;
    color: var(--text-link);
    cursor: pointer;
    padding: 5px;
}
.btn-editar-inline svg {
    width: 18px;
    height: 18px;
    stroke-width: 2;
}
#container-editar-peso {
    display: none;
    flex-direction: column;
    gap: 10px;
    margin-top: 10px;
}
#container-editar-peso input {
    background: var(--input-bg);
    border: 1px solid var(--input-border);
    border-radius: 8px;
    padding: 12px;
    font-size: 1rem;
    color: var(--text-primary);
    font-family: inherit;
    width: 100%;
}
#btn-salvar-peso-final {
    background: var(--btn-accent-bg);
    color: var(--text-on-primary-dark);
    border: none;
    padding: 10px 15px;
    border-radius: 8px;
    cursor: pointer;
    width: 100%;
    font-size: 0.9rem;
    font-weight: 600;
}

/* Páginas Fullscreen */
.page.fullscreen {
    margin: -20px;
    margin-bottom: -20px;
    padding: 0;
    height: calc(100vh);
}
.page.fullscreen.active {
    display: flex;
    flex-direction: column;
}
.fullscreen-container {
    flex: 1;
    overflow-y: auto;
    padding: 20px;
    padding-top: 80px;
}
.fullscreen-header {
    margin-bottom: 20px;
}
.fullscreen-header h2 {
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-primary);
}
.btn-voltar-fullscreen {
    position: absolute;
    top: 20px;
    left: 20px;
    z-index: 10;
}

/* Página de Login */
.login-container {
    display: flex;
    flex-direction: column;
    justify-content: center;
    flex: 1;
    padding: 20px;
}
.login-container h1 {
    font-size: 3rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 30px;
    color: var(--text-primary);
}
#form-login {
    display: flex;
    flex-direction: column;
    gap: 15px;
    width: 100%;
}
.form-group-login {
    display: flex;
    flex-direction: column;
}
.form-group-login label {
    font-size: 0.9rem;
    margin-bottom: 5px;
    color: var(--text-secondary);
}
.form-group-login input[type="email"],
.form-group-login input[type="password"] {
    background: var(--input-bg);
    border: 1px solid var(--input-border);
    border-radius: 8px;
    padding: 14px;
    font-size: 1rem;
    color: var(--text-primary);
    font-family: inherit;
}
.form-group-login input::placeholder {
    color: var(--text-placeholder);
}
.form-group-login.checkbox {
    flex-direction: row;
    align-items: center;
    gap: 10px;
    margin-top: 5px;
}
.form-group-login.checkbox label {
    margin: 0;
    color: var(--text-primary);
}
.form-group-login.checkbox input {
    width: 18px;
    height: 18px;
    accent-color: var(--btn-primary-bg);
}
.btn-login-primario {
    background: var(--btn-primary-bg);
    color: var(--text-on-primary);
    border: none;
    padding: 14px 15px;
    border-radius: 8px;
    cursor: pointer;
    width: 100%;
    font-size: 1rem;
    font-weight: 600;
    margin-top: 10px;
}
.btn-login-secundario {
    background: none;
    color: var(--text-primary);
    border: 1px solid var(--btn-secondary-border);
    padding: 14px 15px;
    border-radius: 8px;
    cursor: pointer;
    width: 100%;
    font-size: 1rem;
    font-weight: 500;
}
.link-esqueci-senha {
    color: var(--text-link);
    text-decoration: none;
    font-size: 0.9rem;
    text-align: center;
    margin-top: 15px;
}

/* Página Formulário Bovino */
#form-bovinos {
    display: flex;
    flex-direction: column;
    gap: 15px;
}
.form-group-bovinos {
    display: flex;
    flex-direction: column;
    gap: 5px;
}
.form-group-bovinos label {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-secondary);
}
.form-group-bovinos input,
.form-group-bovinos select,
.form-group-bovinos textarea {
    background: var(--input-bg);
    border: 1px solid var(--input-border);
    border-radius: 8px;
    padding: 12px;
    font-size: 1rem;
    color: var(--text-primary);
    font-family: inherit;
}
.form-group-bovinos input::placeholder {
    color: var(--text-placeholder);
}
.form-group-bovinos select {
    appearance: none;
    -webkit-appearance: none;
    background-repeat: no-repeat;
    background-position: right 12px center;
    background-size: 16px;
}
html.theme-dark .form-group-bovinos select {
    background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 24 24' stroke-width='2' stroke='%23f9f9f9'><path stroke-linecap='round' stroke-linejoin='round' d='M19.5 8.25l-7.5 7.5-7.5-7.5'/></svg>");
}
html.theme-light .form-group-bovinos select {
    background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 24 24' stroke-width='2' stroke='%23333333'><path stroke-linecap='round' stroke-linejoin='round' d='M19.5 8.25l-7.5 7.5-7.5-7.5'/></svg>");
}
.form-group-bovinos select option {
    background-color: var(--bg-app);
}
.form-group-bovinos textarea {
    resize: vertical;
    min-height: 80px;
}
.form-grid-2 {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 15px;
}
#btn-salvar-bovino {
    background: var(--btn-accent-bg);
    color: var(--text-on-primary-dark);
    border: none;
    padding: 14px 15px;
    border-radius: 8px;
    cursor: pointer;
    width: 100%;
    font-size: 1rem;
    font-weight: 600;
    margin-top: 10px;
}

/* Página Configuração e Theme Toggle */
.preferencias-container {
    display: flex;
    flex-direction: column;
    gap: 10px;
}
.preferencia-item {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 12px;
    padding: 15px 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.preferencia-item label {
    font-size: 1.1rem;
    font-weight: 500;
    color: var(--text-primary);
}
.toggle-switch {
    position: relative;
    display: inline-block;
    width: 50px;
    height: 28px;
}
.toggle-switch input {
    opacity: 0;
    width: 0;
    height: 0;
}
.toggle-slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--input-bg);
    border: 1px solid var(--input-border);
    transition: .4s;
    border-radius: 34px;
}
.toggle-slider:before {
    position: absolute;
    content: "";
    height: 20px;
    width: 20px;
    left: 3px;
    bottom: 3px;
    background-color: var(--text-secondary);
    transition: .4s;
    border-radius: 50%;
}
input:checked + .toggle-slider {
    background-color: var(--btn-primary-bg);
    border-color: var(--btn-primary-bg);
}
input:checked + .toggle-slider:before {
    background-color: white;
    transform: translateX(22px);
}
#btn-logout {
    background: var(--btn-danger-bg);
    color: var(--text-on-primary);
    border: none;
    padding: 14px 15px;
    border-radius: 8px;
    cursor: pointer;
    width: 100%;
    font-size: 1rem;
    font-weight: 600;
    margin-top: 30px;
}

/* Barra de Navegação Inferior */
#bottom-nav {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    display: flex;
    justify-content: space-around;
    align-items: center;
    height: 70px;
    background-color: var(--nav-bg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-top: 1px solid var(--nav-border);
    z-index: 50;
    transition: transform 0.3s ease, background-color 0.3s ease;
    transform: translateY(100%);
}
#bottom-nav.visible {
    transform: translateY(0);
}
.nav-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    flex: 1;
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 0.7rem;
    font-family: inherit;
    cursor: pointer;
    opacity: 0.7;
    transition: opacity 0.2s ease, color 0.2s ease;
    height: 100%;
    position: relative;
    z-index: 51;
}
.nav-item svg {
    width: 24px;
    height: 24px;
    margin-bottom: 4px;
    stroke-width: 2px;
}
.nav-item.active {
    opacity: 1;
    color: var(--text-link);
}

/* FAB (Floating Action Button) */
.fab-container {
    flex: 1;
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
    z-index: 52;
}
#btn-fab-main {
    background-color: var(--btn-fab-bg);
    width: 56px;
    height: 56px;
    border-radius: 50%;
    border: 3px solid var(--bg-app);
    box-shadow: 0 -4px 15px rgba(109, 0, 217, 0.5);
    font-size: 0;
    color: white;
    opacity: 1;
    cursor: pointer;
    display: flex;
    justify-content: center;
    align-items: center;
    transition: transform 0.3s ease, background-color 0.3s ease;
    transform: translateY(-20px);
}
#btn-fab-main svg {
    width: 30px;
    height: 30px;
    stroke-width: 2;
    stroke: var(--btn-fab-icon);
    transition: transform 0.3s ease, stroke 0.3s ease;
}
.fab-container.open #btn-fab-main {
    transform: translateY(-20px) rotate(45deg);
    background-color: var(--btn-fab-open-bg);
}
.fab-container.open #btn-fab-main svg {
    stroke: var(--btn-fab-open-icon);
}
.fab-options {
    position: absolute;
    bottom: 90px;
    left: 95%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column-reverse;
    align-items: flex-end;
    gap: 15px;
    z-index: 51;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
}
.fab-container.open .fab-options {
    opacity: 1;
    pointer-events: auto;
}
.fab-option-item {
    display: flex;
    align-items: center;
    gap: 12px;
    cursor: pointer;
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.3s ease, transform 0.3s ease, display 0.3s;
}
.fab-option-item .label {
    background-color: var(--nav-bg);
    backdrop-filter: blur(5px);
    color: var(--text-primary);
    padding: 8px 12px;
    border-radius: 8px;
    font-size: 0.9rem;
    font-weight: 500;
    white-space: nowrap;
    box-shadow: 0 2px 5px rgba(0,0,0,0.3);
}
.fab-option-item .icon {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background-color: var(--btn-fab-open-bg);
    color: var(--btn-fab-open-icon);
    display: flex;
    justify-content: center;
    align-items: center;
    box-shadow: 0 4px 10px rgba(0,0,0,0.2);
}
.fab-option-item .icon svg {
    width: 24px;
    height: 24px;
    stroke-width: 2;
}
.fab-container.open .fab-option-item {
    opacity: 1;
    transform: translateY(0);
}
.fab-container.open .fab-option-item:nth-child(1) {
    transition-delay: 0.35s;
}
.fab-container.open .fab-option-item:nth-child(2) {
    transition-delay: 0.30s;
}
.fab-container.open .fab-option-item:nth-child(3) {
    transition-delay: 0.25s;
}
.fab-container.open .fab-option-item:nth-child(4) {
    transition-delay: 0.20s;
}
.fab-container.open .fab-option-item:nth-child(5) {
    transition-delay: 0.15s;
}
.fab-container.open .fab-option-item:nth-child(6) {
    transition-delay: 0.10s;
}
.fab-container.open .fab-option-item:nth-child(7) {
    transition-delay: 0.05s;
}

/* Scrim (Fundo Escuro) */
#fab-scrim {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(2px);
    -webkit-backdrop-filter: blur(2px);
    z-index: 49;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
}
#fab-scrim.open {
    opacity: 1;
    pointer-events: auto;
}