/* ==========================================
   VOTO SUSTENTÁVEL E ACESSÍVEL - ESTILOS
   Cores da Bandeira Brasileira
   Amarelo Ouro: #FFD700
   Azul Royal: #0038A8
   Verde: #009B3A
   Branco: #FFFFFF
   ========================================== */

:root {
    --amarelo-ouro: #FFD700;
    --azul-royal: #0038A8;
    --verde-brasil: #009B3A;
    --branco: #FFFFFF;
    --cinza-claro: #F5F5F5;
    --cinza-medio: #666666;
    --preto: #1A1A1A;
    --sombra: rgba(0, 56, 168, 0.15);
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.7;
    color: var(--preto);
    background-color: var(--branco);
}

/* ==========================================
   CABEÇALHO E NAVEGAÇÃO
   ========================================== */

header {
    background: linear-gradient(135deg, var(--azul-royal) 0%, #0052CC 100%);
    color: var(--branco);
    padding: 1rem 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 10px var(--sombra);
}

.header-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
}

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

    .logo img {
        height: 60px;
        width: auto;
    }

.logo-text {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--amarelo-ouro);
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
}

/* Menu Toggle Button */
.menu-toggle {
    display: none;
    background: var(--amarelo-ouro);
    border: none;
    padding: 0.75rem 1rem;
    cursor: pointer;
    border-radius: 5px;
    font-size: 1.2rem;
    color: var(--azul-royal);
    font-weight: bold;
}

    .menu-toggle:hover {
        background: #FFC700;
    }

    .menu-toggle:focus {
        outline: 3px solid var(--branco);
        outline-offset: 2px;
    }

nav {
    flex: 1;
    display: flex;
    justify-content: flex-end;
}

.nav-links {
    list-style: none;
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
    align-items: center;
}

    .nav-links li a {
        color: var(--branco);
        text-decoration: none;
        padding: 0.75rem 1.25rem;
        border-radius: 5px;
        transition: all 0.3s ease;
        display: block;
        font-weight: 500;
    }

        .nav-links li a:hover,
        .nav-links li a:focus {
            background-color: var(--amarelo-ouro);
            color: var(--azul-royal);
            transform: translateY(-2px);
        }

        .nav-links li a.active {
            background-color: var(--amarelo-ouro);
            color: var(--azul-royal);
            font-weight: 700;
        }

/* ==========================================
   CONTAINER PRINCIPAL
   ========================================== */

main {
    max-width: 1200px;
    margin: 2rem auto;
    padding: 0 2rem;
    min-height: calc(100vh - 200px);
}

.container {
    background: var(--branco);
    padding: 2.5rem;
    border-radius: 10px;
    box-shadow: 0 5px 20px var(--sombra);
}

/* ==========================================
   TIPOGRAFIA
   ========================================== */

h1 {
    color: var(--azul-royal);
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
    padding-bottom: 0.75rem;
    border-bottom: 4px solid var(--amarelo-ouro);
    line-height: 1.3;
}

h2 {
    color: var(--azul-royal);
    font-size: 2rem;
    margin-top: 2.5rem;
    margin-bottom: 1.25rem;
    padding-left: 1rem;
    border-left: 5px solid var(--amarelo-ouro);
}

h3 {
    color: var(--verde-brasil);
    font-size: 1.6rem;
    margin-top: 2rem;
    margin-bottom: 1rem;
}

h4 {
    color: var(--azul-royal);
    font-size: 1.3rem;
    margin-top: 1.5rem;
    margin-bottom: 0.75rem;
    font-style: italic;
}

h5 {
    color: var(--verde-brasil);
    font-size: 1.1rem;
    margin-top: 1.25rem;
    margin-bottom: 0.5rem;
}

h6 {
    color: var(--cinza-medio);
    font-size: 1rem;
    margin-top: 1rem;
    margin-bottom: 0.5rem;
    font-style: italic;
}

p {
    margin-bottom: 1.25rem;
    text-align: justify;
}

strong, b {
    color: var(--azul-royal);
    font-weight: 700;
}

em, i {
    font-style: italic;
}

/* ==========================================
   LISTAS
   ========================================== */

ul, ol {
    margin-bottom: 1.5rem;
    padding-left: 2.5rem;
}

    ul li, ol li {
        margin-bottom: 0.75rem;
        line-height: 1.7;
    }

        ul li::marker {
            color: var(--amarelo-ouro);
            font-size: 1.2em;
        }

        ol li::marker {
            color: var(--azul-royal);
            font-weight: bold;
        }

/* ==========================================
   IMAGENS
   ========================================== */

.image-container {
    margin: 2rem 0;
    text-align: center;
}

    .image-container img {
        max-width: 100%;
        height: auto;
        border-radius: 10px;
        box-shadow: 0 5px 15px var(--sombra);
        transition: transform 0.3s ease;
    }

        .image-container img:hover {
            transform: scale(1.02);
        }

.image-caption {
    margin-top: 0.75rem;
    font-size: 0.95rem;
    color: var(--cinza-medio);
    font-style: italic;
}

/* ==========================================
   NAVEGAÇÃO DE PÁGINAS
   ========================================== */

.page-navigation {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 3rem;
    padding-top: 2rem;
    border-top: 2px solid var(--cinza-claro);
    gap: 1rem;
}

    .page-navigation a {
        display: inline-flex;
        align-items: center;
        gap: 0.5rem;
        padding: 1rem 1.5rem;
        background: var(--amarelo-ouro);
        color: var(--azul-royal);
        text-decoration: none;
        border-radius: 8px;
        font-weight: 600;
        transition: all 0.3s ease;
        box-shadow: 0 3px 10px rgba(255, 215, 0, 0.3);
    }

        .page-navigation a:hover,
        .page-navigation a:focus {
            background: var(--azul-royal);
            color: var(--amarelo-ouro);
            transform: translateY(-3px);
            box-shadow: 0 5px 15px rgba(0, 56, 168, 0.4);
        }

        .page-navigation a:disabled {
            opacity: 0.5;
            cursor: not-allowed;
        }

/* ==========================================
   RODAPÉ
   ========================================== */

footer {
    background: linear-gradient(135deg, var(--verde-brasil) 0%, #007A2F 100%);
    color: var(--branco);
    text-align: center;
    padding: 2rem;
    margin-top: 3rem;
}

    footer p {
        margin-bottom: 0.5rem;
        text-align: center;
    }

    footer a {
        color: var(--amarelo-ouro);
        text-decoration: none;
        font-weight: 600;
    }

        footer a:hover,
        footer a:focus {
            text-decoration: underline;
        }

/* ==========================================
   ACESSIBILIDADE
   ========================================== */

/* Skip to content link */
.skip-link {
    position: absolute;
    top: -40px;
    left: 0;
    background: var(--amarelo-ouro);
    color: var(--azul-royal);
    padding: 8px;
    text-decoration: none;
    font-weight: bold;
    z-index: 100;
}

    .skip-link:focus {
        top: 0;
    }

/* Focus styles */
*:focus {
    outline: 3px solid var(--amarelo-ouro);
    outline-offset: 2px;
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    :root {
        --azul-royal: #0000CC;
        --amarelo-ouro: #FFFF00;
    }
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* ==========================================
   RESPONSIVIDADE
   ========================================== */

@media (max-width: 768px) {
    html {
        font-size: 14px;
    }

    .header-container {
        flex-direction: column;
        gap: 1rem;
    }

    .menu-toggle {
        display: block;
    }

    nav {
        width: 100%;
        order: 3;
    }

    .nav-links {
        display: none;
        flex-direction: column;
        width: 100%;
        gap: 0.5rem;
        padding: 1rem 0;
    }

        .nav-links.active {
            display: flex;
        }

        .nav-links li {
            width: 100%;
        }

            .nav-links li a {
                width: 100%;
                text-align: center;
            }

    main {
        padding: 0 1rem;
    }

    .container {
        padding: 1.5rem;
    }

    h1 {
        font-size: 2rem;
    }

    h2 {
        font-size: 1.6rem;
    }

    h3 {
        font-size: 1.3rem;
    }

    .page-navigation {
        flex-direction: column;
    }

        .page-navigation a {
            width: 100%;
            justify-content: center;
        }
}

@media (max-width: 480px) {
    html {
        font-size: 13px;
    }

    .logo-text {
        font-size: 1.2rem;
    }

    h1 {
        font-size: 1.75rem;
    }

    ul, ol {
        padding-left: 1.5rem;
    }
}

/* ==========================================
   UTILITÁRIOS
   ========================================== */

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

.mt-2 {
    margin-top: 2rem;
}

.mb-2 {
    margin-bottom: 2rem;
}

.highlight {
    background-color: var(--amarelo-ouro);
    color: var(--azul-royal);
    padding: 0.2rem 0.4rem;
    border-radius: 3px;
    font-weight: 600;
}

/* ==========================================
   PÁGINA INICIAL
   ========================================== */

.hero {
    text-align: center;
    padding: 3rem 0;
    background: linear-gradient(135deg, var(--azul-royal) 0%, var(--verde-brasil) 100%);
    color: var(--branco);
    border-radius: 10px;
    margin-bottom: 2rem;
}

    .hero h1 {
        color: var(--amarelo-ouro);
        border-bottom: none;
        font-size: 3rem;
        text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
    }

    .hero p {
        font-size: 1.3rem;
        margin-top: 1rem;
        text-align: center;
    }

.chapters-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
    margin-top: 2rem;
}

.chapter-card {
    background: var(--cinza-claro);
    padding: 1.5rem;
    border-radius: 10px;
    border-left: 5px solid var(--amarelo-ouro);
    transition: all 0.3s ease;
    box-shadow: 0 3px 10px rgba(0, 0, 0, 0.1);
}

    .chapter-card:hover {
        transform: translateY(-5px);
        box-shadow: 0 5px 20px var(--sombra);
        border-left-color: var(--azul-royal);
    }

    .chapter-card h3 {
        color: var(--azul-royal);
        margin-top: 0;
        font-size: 1.2rem;
    }

    .chapter-card a {
        display: inline-block;
        margin-top: 1rem;
        padding: 0.75rem 1.5rem;
        background: var(--amarelo-ouro);
        color: var(--azul-royal);
        text-decoration: none;
        border-radius: 5px;
        font-weight: 600;
        transition: all 0.3s ease;
    }

        .chapter-card a:hover,
        .chapter-card a:focus {
            background: var(--azul-royal);
            color: var(--amarelo-ouro);
        }

/* Print styles */
@media print {
    header, footer, .page-navigation, .menu-toggle {
        display: none;
    }

    main {
        max-width: 100%;
        margin: 0;
        padding: 0;
    }

    .container {
        box-shadow: none;
        padding: 0;
    }

    a {
        color: #000;
        text-decoration: underline;
    }
}

/* ==========================================
   VÍDEOS DO YOUTUBE RESPONSIVOS
   ========================================== */

.youtube-container {
    position: relative;
    width: 100%;
    max-width: 900px;
    margin: 2rem auto;
    padding-bottom: 56.25%; /* Proporção 16:9 (9/16 = 0.5625) */
    height: 0;
    overflow: hidden;
    border-radius: 10px;
    box-shadow: 0 5px 20px rgba(0, 56, 168, 0.3);
    background: #000;
}

    .youtube-container iframe {
        position: absolute;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        border: 0;
    }

        .youtube-container iframe:focus {
            outline: 3px solid var(--amarelo-ouro);
            outline-offset: 2px;
        }

    /* Proporções alternativas */
    .youtube-container.ratio-4-3 {
        padding-bottom: 75%; /* 3/4 = 75% */
    }

    .youtube-container.ratio-21-9 {
        padding-bottom: 42.857%; /* 9/21 = 42.857% */
    }

/* Responsividade para YouTube em mobile */
@media (max-width: 768px) {
    .youtube-container {
        max-width: 100%;
        margin: 1.5rem 0;
        border-radius: 0;
    }
}

@media (max-width: 480px) {
    .youtube-container {
        margin: 1rem 0;
    }
}

header {
    border: 0px solid red;
    box-shadow: 0px 0px 15px 10px rgba(0,0,0,0.2);
    background: #021430;
    background: linear-gradient(90deg,rgba(2, 20, 48, 1) 0%, rgba(2, 20, 48, 1) 17%, rgba(0, 61, 174, 1) 49%);
}

nav {
    border: 0px solid red;
    margin: 0;
}

    nav ul {
        border: 0px solid red;
        margin: 0;
    }

    nav > ul > li {
        border: 0px solid #003dae;
        margin: 0;
        padding: 0px;
    }

        nav > ul > li > a {
            margin: 0;
            padding: 1px 8px !important;
        }

h1, h2, h3, h4, h5, p, strong, span {
    line-height: 130%;
}