/* /css/estilo.css (Consolidado e Melhorado) */

/* 1. Variáveis CSS para Cores e Fontes */
:root {
    --primary-color: #2a9d8f; /* Teal */
    --secondary-color: #e9c46a; /* Golden */
    --dark-blue: #264653; /* Darker Blue for footer/titles */
    --coral-red: #e76f51; /* Coral Red for accents */
    --text-color-dark: #333;
    --text-color-light: #fff;
    --background-light: #f4f4f4;
    --background-white: #ffffff;
    --shadow-light: rgba(0,0,0,0.1);
    --shadow-medium: rgba(0,0,0,0.08);
    --shadow-strong: rgba(0,0,0,0.12);

    --font-heading: 'Roboto', sans-serif;
    --font-body: 'Open Sans', sans-serif;
}

/* 2. Reset Básico */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* 3. Estilos Globais do Corpo */
body {
    font-family: var(--font-body);
    line-height: 1.6;
    color: var(--text-color-dark);
    background-color: var(--background-light);
    scroll-behavior: smooth;
    display: flex; /* Para footer fixo no final */
    flex-direction: column; /* Para footer fixo no final */
    min-height: 100vh; /* Para footer fixo no final */
}

/* 4. Contêiner de Conteúdo Centralizado */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* 5. Cabeçalho da Página */
.page-header {
    background-color: var(--primary-color);
    color: var(--text-color-light);
    padding: 1rem 0;
    box-shadow: 0 0.125rem 0.3125rem var(--shadow-light);
    position: sticky;
    top: 0;
    z-index: 1000;
    width: 100%;
}

.page-header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.logo {
    display: flex;
    align-items: center;
    font-size: 1.8rem;
    font-weight: 700;
    font-family: var(--font-heading);
    color: var(--text-color-light);
    text-decoration: none;
}

.logo img {
    height: 3rem;
    width: auto;
    margin-right: 0.625rem;
    border-radius: 50%; /* Se quiser um logo redondo */
}

/* 6. Navegação Principal */
.main-nav {
    display: flex;
    gap: 1.5rem;
}

.main-nav a {
    color: var(--text-color-light);
    text-decoration: none;
    font-weight: 600;
    transition: color 0.3s ease, transform 0.2s ease;
    position: relative;
    padding: 0.25rem 0;
}

.main-nav a::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: 0;
    width: 0;
    height: 2px;
    background-color: var(--secondary-color);
    transition: width 0.3s ease;
}

.main-nav a:hover::after,
.main-nav a:focus::after {
    width: 100%;
}

.main-nav a:hover,
.main-nav a:focus {
    color: var(--secondary-color);
    transform: translateY(-2px);
    outline: none;
}

/* 7. Wrapper do Conteúdo Principal */
.main-content {
    padding: 2.5rem 0;
    flex-grow: 1; /* Permite que o conteúdo principal ocupe o espaço restante */
}

/* 8. Rodapé da Página */
.page-footer {
    background-color: var(--dark-blue);
    color: var(--text-color-light);
    text-align: center;
    padding: 1.25rem 0;
    margin-top: 3.125rem;
    font-size: 0.9rem;
}

.page-footer p {
    margin: 0;
}

/* 9. Estilos Específicos da Página de Conteúdo (Antigo estilo3.css) */

.content-section {
    background-color: var(--background-white);
    padding: 2.5rem;
    border-radius: 8px;
    box-shadow: 0 0.25rem 0.625rem var(--shadow-medium);
    margin-bottom: 2.5rem;
}

.page-title {
    font-family: var(--font-heading);
    color: var(--dark-blue);
    font-size: 2.5rem;
    text-align: center;
    margin-bottom: 1.5rem;
    line-height: 1.2;
}

.intro-text {
    font-size: 1.1rem;
    text-align: center;
    margin-bottom: 1.5rem;
    color: #555;
}

.section-title {
    font-family: var(--font-heading);
    color: var(--primary-color);
    font-size: 1.8rem;
    margin-top: 2.5rem;
    margin-bottom: 1.2rem;
    border-bottom: 2px solid var(--secondary-color);
    padding-bottom: 0.5rem;
}

.substance-type-list {
    list-style: none; /* Remove bullets padrão */
    padding-left: 0;
    margin-bottom: 2rem;
}

.substance-type-list li {
    position: relative;
    padding-left: 1.5rem; /* Espaço para o bullet customizado */
    margin-bottom: 0.8rem;
    font-size: 1.05rem;
    text-align: justify;
}

.substance-type-list li::before {
    content: '\2022'; /* Bullet de bolinha */
    color: var(--coral-red); /* Cor vibrante para destaque */
    font-weight: bold;
    font-size: 1.2em;
    position: absolute;
    left: 0;
    top: 0;
    line-height: 1.6;
}

/* Estilo para os cards de substâncias */
.substance-card {
    background-color: var(--background-white);
    border: 1px solid #e0e0e0;
    border-left: 8px solid var(--primary-color); /* Borda lateral para destaque */
    border-radius: 8px;
    padding: 1.8rem;
    margin-bottom: 1.8rem;
    box-shadow: 0 0.125rem 0.5rem var(--shadow-light);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.substance-card:hover {
    transform: translateY(-5px); /* Efeito de elevação */
    box-shadow: 0 0.5rem 1rem var(--shadow-medium);
}

.substance-card h3 {
    font-family: var(--font-heading);
    color: var(--dark-blue);
    font-size: 1.6rem;
    margin-bottom: 0.8rem;
    display: flex;
    align-items: center;
    gap: 0.5rem; /* Espaçamento entre emoji e texto */
}

.substance-card h3 strong {
    font-weight: 700;
}

.substance-card .synonyms {
    font-size: 0.95rem;
    color: #666;
    margin-bottom: 1.2rem;
    font-style: italic;
    border-bottom: 1px dashed #ddd; /* Linha tracejada para separar */
    padding-bottom: 0.8rem;
}

.substance-info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); /* Layout responsivo em grid */
    gap: 1.2rem;
}

.substance-info-grid .info-item {
    margin-bottom: 0; /* Remove margin padrão do p dentro do grid */
    font-size: 1rem;
    text-align: justify;
}

.substance-info-grid .label {
    font-weight: 700;
    color: var(--primary-color);
    display: block; /* Garante que o label fique em uma linha separada se necessário */
    margin-bottom: 0.2rem;
}

.important-note {
    background-color: #fff3cd; /* Amarelo claro para aviso */
    border-left: 5px solid #ffc107; /* Borda lateral amarela */
    padding: 1.5rem;
    margin-top: 3rem;
    margin-bottom: 2rem;
    border-radius: 5px;
    color: #664d03;
    font-size: 1.05rem;
}

.important-note p {
    margin-bottom: 0.5rem;
}

.important-note a {
    color: #0d6efd; /* Azul padrão para links */
    text-decoration: underline;
}

.source-info {
    margin-top: 2rem;
    padding-top: 1.5rem;
    border-top: 1px solid #e0e0e0;
    font-size: 0.95rem;
    color: #555;
}

.source-info ul {
    list-style: inside; /* Bolinhas dentro do fluxo do texto */
    padding-left: 0;
    margin-top: 0.8rem;
}

.source-info li {
    margin-bottom: 0.5rem;
}

.source-info a {
    color: var(--primary-color);
    text-decoration: none;
    transition: color 0.3s ease;
}

.source-info a:hover {
    color: var(--dark-blue);
    text-decoration: underline;
}


/* 10. Responsividade Geral */
@media (max-width: 992px) {
    .page-title {
        font-size: 2rem;
    }
    .section-title {
        font-size: 1.6rem;
    }
    .substance-card h3 {
        font-size: 1.4rem;
    }
    .substance-info-grid {
        grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    }
}

@media (max-width: 768px) {
    .page-header .container {
        flex-direction: column;
        text-align: center;
    }

    .logo {
        margin-bottom: 1rem;
    }

    .main-nav {
        flex-direction: column;
        gap: 0.8rem;
    }

    .main-nav a {
        margin-left: 0;
        padding: 0.5rem 0;
    }

    .page-header {
        position: static; /* Remove sticky em telas menores se preferir */
    }

    .content-section {
        padding: 1.5rem;
    }

    .page-title {
        font-size: 1.8rem;
    }

    .section-title {
        font-size: 1.4rem;
    }

    .substance-card h3 {
        font-size: 1.3rem;
    }
    .substance-info-grid {
        grid-template-columns: 1fr; /* Uma coluna em telas muito pequenas */
    }
}

@media (max-width: 480px) {
    .logo {
        font-size: 1.5rem;
    }

    .logo img {
        height: 2.5rem;
    }

    .container {
        padding: 0 1rem; /* Menor padding em telas muito pequenas */
    }

    .content-section {
        padding: 1rem;
    }

    .page-title {
        font-size: 1.5rem;
        margin-bottom: 1rem;
    }

    .intro-text {
        font-size: 1rem;
        margin-bottom: 1rem;
    }

    .section-title {
        font-size: 1.2rem;
        margin-top: 1.5rem;
        margin-bottom: 0.8rem;
    }

    .substance-card {
        padding: 1.2rem;
        margin-bottom: 1.2rem;
    }

    .substance-card h3 {
        font-size: 1.1rem;
        margin-bottom: 0.6rem;
    }

    .substance-card .synonyms {
        font-size: 0.85rem;
        margin-bottom: 0.8rem;
        padding-bottom: 0.6rem;
    }

    .substance-info-grid .label {
        font-size: 0.9rem;
    }

    .substance-info-grid .info-item {
        font-size: 0.95rem;
    }

    .important-note {
        padding: 1rem;
        margin-top: 2rem;
        margin-bottom: 1.5rem;
        font-size: 0.95rem;
    }

    .source-info {
        margin-top: 1.5rem;
        padding-top: 1rem;
        font-size: 0.85rem;
    }
}