/* ======================================================
   style.css - Folha de Estilos Global
   (Baseado na versão funcional da Lição 1 com CSS embutido)
   ====================================================== */

/* --- Variáveis Globais --- */
:root {
    /* Modo Claro (Padrão) */
    --primary-color: #005A9C;
    --secondary-color: #007BFF;
    --text-color: #343A40;
    --text-muted: #6c757d;
    --bg-color: #F8F9FA;
    --container-bg: #FFFFFF;
    --section-odd-bg: var(--white-color);
    --section-even-bg: #F1F3F5;
    --light-gray: #F8F9FA;
    --border-color: #DEE2E6;
    --white-color: #FFFFFF;
    --code-bg-color: #E8F7FF;
    --success-color: #28A745;
    --danger-color: #DC3545;
    --success-bg-light: #e9f7ef;
    --danger-bg-light: #fdecef;
    --link-color: var(--secondary-color);
    --button-text-color: var(--white-color);
    --header-text-color: var(--white-color);
    --note-bg: #fff3cd;
    --note-border: #ffe08a;
    --shadow-color: rgba(0, 0, 0, 0.08);
    --panel-width: 320px; /* Largura padrão painéis flutuantes */
    --panel-margin: 20px; /* Margem padrão painéis flutuantes */
    --chat-width: 340px; /* Largura específica chat */
    --chat-height: 450px; /* Altura específica chat */
    color-scheme: light;
}

body.dark-mode {
    /* Modo Escuro */
    --primary-color: #58a6ff;
    --secondary-color: #79c0ff;
    --text-color: #c9d1d9;
    --text-muted: #8b949e;
    --bg-color: #010409;
    --container-bg: #0d1117;
    --section-odd-bg: var(--container-bg);
    --section-even-bg: #161b22;
    --light-gray: #161b22;
    --border-color: #30363d;
    --white-color: #0d1117;
    --code-bg-color: #1e293b;
    --success-color: #3fb950;
    --danger-color: #f85149;
    --success-bg-light: rgba(46, 160, 67, 0.15);
    --danger-bg-light: rgba(219, 55, 69, 0.15);
    --link-color: var(--secondary-color);
    --button-text-color: #0d1117; /* Ajustado para botões claros no dark mode */
    --header-text-color: var(--white-color); /* Mantém texto do header branco */
    --note-bg: rgba(187, 128, 9, 0.15);
    --note-border: #eac54f;
    --shadow-color: rgba(200, 200, 200, 0.1);
    color-scheme: dark;
}

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

html {
    -ms-overflow-style: none;  /* IE and Edge */
    scrollbar-width: none;  /* Firefox */
}
html::-webkit-scrollbar {
    display: none; /* Chrome, Safari, Opera */
}

body {
    font-family: 'Poppins', sans-serif;
    line-height: 1.7;
    color: var(--text-color);
    font-size: 16px;
    background-color: var(--bg-color);
    /* Fundo com padrão diagonal */
    background-image: repeating-linear-gradient(
        45deg,
        transparent,
        transparent 18px,
        hsla(from var(--text-muted) h s l / 0.02) 18px,
        hsla(from var(--text-muted) h s l / 0.02) 20px
    );
    background-size: auto;
    background-attachment: fixed;
    transition: background-color 0.3s ease, color 0.3s ease;
    padding: 0; /* Padding geral removido do body */
    /* Scrollbar hiding for body itself */
    -ms-overflow-style: none;
    scrollbar-width: none;
    overflow-y: scroll; /* Garante que body possa rolar */
}
body::-webkit-scrollbar {
    display: none;
}
body.dark-mode {
     background-image: repeating-linear-gradient(
        45deg,
        transparent,
        transparent 18px,
        hsla(from var(--text-muted) h s l / 0.03) 18px,
        hsla(from var(--text-muted) h s l / 0.03) 20px
    );
}

a {
    color: var(--link-color);
    text-decoration: none;
    transition: color 0.2s ease;
}
a:hover {
    text-decoration: underline;
    color: var(--primary-color);
}

/* --- Layout Principal --- */
.container {
    max-width: 900px;
    margin: 20px auto;
    background-color: var(--container-bg);
    border-radius: 8px;
    box-shadow: 0 6px 18px var(--shadow-color);
    border-top: 5px solid var(--primary-color);
    transition: background-color 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
    position: relative;
    z-index: 1;
    padding: 0; /* Padding será nas seções internas ou elementos específicos */
    overflow: hidden; /* Contém cantos arredondados */
}

/* --- Cabeçalho (Lição e Índice) --- */
.lesson-header {
    background-color: var(--primary-color);
    color: var(--header-text-color);
    padding: 15px 30px; /* Padding ajustado */
    border-bottom: 1px solid rgba(0, 0, 0, 0.1);
    display: flex;
    align-items: center;
    justify-content: space-between;
    transition: background-color 0.3s ease, color 0.3s ease;
    flex-wrap: wrap;
    position: relative;
    z-index: 2;
    gap: 15px; /* Espaço entre título e controles */
}
body.dark-mode .lesson-header {
    border-bottom-color: rgba(255, 255, 255, 0.1);
}
.lesson-header h1 {
    margin: 0;
    font-size: 1.6em; /* Tamanho ajustado */
    font-weight: 700;
    flex-shrink: 0;
    margin-right: auto; /* Empurra controles para direita */
}
.header-controls {
    display: flex;
    align-items: center;
    gap: 10px; /* Gap entre botões */
    flex-wrap: nowrap;
}

/* Estilo Botões do Header (Geral) */
#home-index-btn, #prev-lesson-btn, #next-lesson-btn,
#video-toggle-btn, #notepad-toggle-btn, #theme-toggle-btn, #chat-toggle-btn,
#search-toggle-btn /* Adicionado botão de toggle da busca */ {
    background: none;
    border: none;
    color: var(--header-text-color);
    font-size: 1.2em;
    cursor: pointer;
    padding: 5px;
    line-height: 1;
    transition: color 0.3s ease, transform 0.2s ease;
    text-decoration: none;
    vertical-align: middle;
}
#home-index-btn:hover, #prev-lesson-btn:hover, #next-lesson-btn:hover,
#video-toggle-btn:hover, #notepad-toggle-btn:hover, #theme-toggle-btn:hover, #chat-toggle-btn:hover,
#search-toggle-btn:hover {
    color: #ffdf5d;
    transform: scale(1.1);
}
/* Ordem dos botões (Exemplo para Lição) */
#home-index-btn { order: 1; }
#prev-lesson-btn { order: 2; }
#next-lesson-btn { order: 3; }
#theme-toggle-btn { order: 4; }
#video-toggle-btn { order: 5; }
#notepad-toggle-btn { order: 6; }
#chat-toggle-btn { order: 7; }

/* Estilo ativo para toggles */
#video-toggle-btn.active, #notepad-toggle-btn.active, #chat-toggle-btn.active,
#search-toggle-btn.active { /* Adicionado botão de toggle da busca */
    color: #ffdf5d;
}

/* Cores dark mode para botões */
body.dark-mode #home-index-btn, body.dark-mode #prev-lesson-btn, body.dark-mode #next-lesson-btn,
body.dark-mode #video-toggle-btn, body.dark-mode #notepad-toggle-btn, body.dark-mode #theme-toggle-btn, body.dark-mode #chat-toggle-btn,
body.dark-mode #search-toggle-btn {
    color: var(--header-text-color);
}
body.dark-mode #home-index-btn:hover, body.dark-mode #prev-lesson-btn:hover, body.dark-mode #next-lesson-btn:hover,
body.dark-mode #video-toggle-btn:hover, body.dark-mode #notepad-toggle-btn:hover, body.dark-mode #theme-toggle-btn:hover, body.dark-mode #chat-toggle-btn:hover,
body.dark-mode #search-toggle-btn:hover,
body.dark-mode #video-toggle-btn.active, body.dark-mode #notepad-toggle-btn.active, body.dark-mode #chat-toggle-btn.active,
body.dark-mode #search-toggle-btn.active {
    color: #ffdf5d;
}

/* Ícones Sol/Lua */
#theme-toggle-btn .fa-sun { display: none; }
body.dark-mode #theme-toggle-btn .fa-sun { display: inline-block; }
body.dark-mode #theme-toggle-btn .fa-moon { display: none; }

/* --- Estilos Busca (Índice) --- */
.search-container { /* Para busca inline no header do índice */
    display: flex;
    align-items: center;
    background-color: rgba(255, 255, 255, 0.15);
    border-radius: 20px;
    padding: 4px 8px;
    transition: background-color 0.3s ease;
    order: 8; /* Ordem da busca no header do índice */
}
body.dark-mode .search-container { background-color: rgba(0, 0, 0, 0.2); }
.search-container i { color: var(--header-text-color); margin-right: 5px; font-size: 0.9em; opacity: 0.8; }
#lesson-search { /* Input de busca no header do índice */
    background: transparent;
    border: none;
    outline: none;
    color: var(--header-text-color);
    font-size: 0.9em;
    padding: 4px;
    width: 150px;
    transition: width 0.3s ease, background-color 0.3s ease;
}
#lesson-search:focus { width: 220px; background-color: rgba(0, 0, 0, 0.1); }
body.dark-mode #lesson-search:focus { background-color: rgba(255, 255, 255, 0.1); }

/* --- Container da Barra de Busca (Se usar toggle) --- */
#search-bar-container {
    background-color: var(--section-even-bg);
    padding: 0;
    overflow: hidden;
    max-height: 0;
    opacity: 0;
    transition: max-height 0.4s ease-out, opacity 0.3s ease-out, padding 0.4s ease-out;
    border-bottom: 1px solid transparent;
}
#search-bar-container.visible {
    max-height: 100px;
    opacity: 1;
    padding: 15px 40px;
    border-bottom-color: var(--border-color);
}
body.dark-mode #search-bar-container { background-color: var(--section-even-bg); }
body.dark-mode #search-bar-container.visible { border-bottom-color: var(--border-color); }
#search-bar-container #lesson-search { /* Estilo do input dentro do container separado */
    width: 100%;
    padding: 10px 15px;
    font-size: 1em;
    border-radius: 6px;
    border: 1px solid var(--border-color);
    background-color: var(--container-bg);
    color: var(--text-color);
    outline: none;
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}
#search-bar-container #lesson-search:focus {
    border-color: var(--secondary-color);
    box-shadow: 0 0 0 3px hsla(from var(--secondary-color) h s l / 0.2);
}
body.dark-mode #search-bar-container #lesson-search { background-color: var(--bg-color); border-color: var(--border-color); color: var(--text-color); }


/* --- Seção de Introdução (Índice) --- */
#instructor-intro-content { padding: 30px 40px; text-align: center; border-bottom: 1px solid var(--border-color); }
#instructor-intro-content p { max-width: 700px; margin: 0 auto 25px auto; font-size: 1.05em; line-height: 1.8; color: var(--text-muted); }
body.dark-mode #instructor-intro-content p { color: var(--text-muted); }
.video-container { position: relative; padding-bottom: 56.25%; height: 0; overflow: hidden; max-width: 600px; margin: 0 auto 30px auto; border-radius: 8px; box-shadow: 0 4px 12px var(--shadow-color); background-color: #000; }
.video-container iframe { position: absolute; top: 0; left: 0; width: 100%; height: 100%; border: 0; }
.social-links { display: flex; justify-content: center; align-items: center; gap: 20px; margin-top: 20px; flex-wrap: wrap; padding-bottom: 10px; }
.social-btn { display: inline-flex; align-items: center; justify-content: center; padding: 10px 18px; border-radius: 50px; background-color: var(--primary-color); color: var(--button-text-color); text-decoration: none; font-size: 0.9em; font-weight: 500; transition: background-color 0.3s ease, transform 0.2s ease; min-width: 120px; text-align: center; }
.social-btn i { font-size: 1.2em; margin-right: 8px; }
.social-btn:hover { background-color: var(--secondary-color); transform: scale(1.05); }
body.dark-mode .social-btn { background-color: var(--secondary-color); color: var(--button-text-color); }
body.dark-mode .social-btn:hover { background-color: var(--primary-color); }
.social-btn.youtube { background-color: #FF0000; } .social-btn.youtube:hover { background-color: #cc0000; }
.social-btn.instagram { background: radial-gradient(circle at 30% 107%, #fdf497 0%, #fdf497 5%, #fd5949 45%,#d6249f 60%,#285AEB 90%); color: white; } .social-btn.instagram:hover { opacity: 0.9; }
.social-btn.whatsapp { background-color: #25D366; } .social-btn.whatsapp:hover { background-color: #1DAF54; }


/* --- Estilos das Seções Collapsible do Índice --- */
.index-section { margin: 25px 40px; }
.index-section:last-child { margin-bottom: 30px; }

.index-section-title { color: var(--primary-color); font-weight: 600; font-size: 1.5em; margin: 0; padding: 15px 60px 15px 30px; cursor: pointer; position: relative; user-select: none; transition: background-color 0.2s ease, color 0.3s ease, border-radius 0.1s linear; display: flex; align-items: center; border: 1px solid var(--border-color); background-color: var(--section-even-bg); border-radius: 6px; }
.index-section-title:hover { background-color: hsla(from var(--primary-color) h s l / 0.1); }
 body.dark-mode .index-section-title { color: var(--secondary-color); border-color: var(--border-color); background-color: var(--section-even-bg); }
  body.dark-mode .index-section-title:hover { background-color: hsla(from var(--secondary-color) h s l / 0.1); }
 .index-section-title i.section-icon { font-size: 0.9em; margin-right: 12px; color: var(--secondary-color); width: 25px; text-align: center; transition: color 0.3s ease; flex-shrink: 0; }
 .index-section-title .toggle-icon { position: absolute; right: 25px; top: 50%; transform: translateY(-50%) rotate(0deg); font-size: 0.8em; color: var(--text-muted); transition: transform 0.3s ease-out; }
 .index-section-title.active .toggle-icon { transform: translateY(-50%) rotate(180deg); }
 .index-section-title.active { border-bottom-left-radius: 0; border-bottom-right-radius: 0; border-bottom-color: transparent; }


/* --- Estilos Essenciais para Collapsible (Geral) --- */
.collapsible-content { max-height: 0; overflow: hidden; transition: max-height 0.4s ease-out, padding-top 0.4s ease-out, padding-bottom 0.4s ease-out, border-width 0.1s linear 0.3s, opacity 0.4s ease-out; padding-left: 30px; padding-right: 30px; padding-top: 0; padding-bottom: 0; border: 0px solid var(--border-color); border-top: none; box-sizing: border-box; width: 100%; background-color: var(--section-odd-bg); border-radius: 0 0 6px 6px; margin-bottom: 0; opacity: 0; }
 body.dark-mode .collapsible-content { background-color: var(--section-odd-bg); border-color: var(--border-color); }
.collapsible-content.open { max-height: 10000px; transition: max-height 0.6s ease-in, padding-top 0.4s ease-in, padding-bottom 0.4s ease-in, border-width 0.1s linear, opacity 0.4s ease-in 0.1s; padding-top: 25px; padding-bottom: 30px; border-width: 1px; border-top: none; opacity: 1; }
/* Estilos específicos para conteúdo collapsible dentro de lições */
.lesson-content .collapsible-content { padding-left: 30px; padding-right: 30px; border-left: none; border-right: none; border-bottom: none; border-radius: 0; background-color: transparent; }
.lesson-content .collapsible-content.open { border-top: 1px solid var(--border-color); }
body.dark-mode .lesson-content .collapsible-content { background-color: transparent; }


/* Estilos das Grelhas (Índice) */
#lesson-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 20px; padding: 0; margin: 0 0 20px 0; }
.lesson-grid-button { display: flex; flex-direction: column; justify-content: center; align-items: center; min-height: 150px; padding: 15px; background-color: var(--primary-color); color: var(--button-text-color); text-decoration: none; border-radius: 8px; text-align: center; box-shadow: 0 4px 8px var(--shadow-color); transition: transform 0.2s ease-out, box-shadow 0.2s ease-out, background-color 0.3s ease; border: 1px solid transparent; }
body.dark-mode .lesson-grid-button { border-color: var(--border-color); background-color: var(--secondary-color); color: var(--button-text-color); }
.lesson-grid-button:hover { transform: translateY(-5px) scale(1.03); box-shadow: 0 8px 16px var(--shadow-color); background-color: var(--secondary-color); color: var(--button-text-color); }
body.dark-mode .lesson-grid-button:hover { background-color: var(--primary-color); border-color: var(--primary-color); }
.lesson-grid-button .title { font-weight: 700; font-size: 1.1em; line-height: 1.3; margin-bottom: 8px; }
.lesson-grid-button .cefr { font-size: 0.8em; font-weight: 400; opacity: 0.8; }

/* Estilos Listas Complementares (Índice) */
.complementary-group { margin-bottom: 30px; }
.complementary-group:last-child { margin-bottom: 0; }
.complementary-group-title { color: var(--primary-color); font-weight: 600; font-size: 1.1em; margin-bottom: 15px; padding-bottom: 5px; border-bottom: 1px solid var(--border-color); }
 body.dark-mode .complementary-group-title { color: var(--secondary-color); border-bottom-color: var(--border-color); }
.complementary-lesson-list { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 10px; }
.complementary-lesson-item a { display: flex; align-items: center; background-color: var(--section-odd-bg); color: var(--text-color); padding: 10px 12px; border-radius: 5px; text-decoration: none; font-size: 0.9em; border: 1px solid var(--border-color); transition: background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease, transform 0.1s ease; min-height: 40px; line-height: 1.3; }
 body.dark-mode .complementary-lesson-item a { background-color: var(--section-even-bg); border-color: var(--border-color); color: var(--text-color); }
.complementary-lesson-item a::before { content: '\f101'; font-family: 'Font Awesome 6 Free'; font-weight: 900; margin-right: 8px; font-size: 0.8em; color: var(--secondary-color); opacity: 0.7; transition: color 0.2s ease, opacity 0.2s ease; }
 body.dark-mode .complementary-lesson-item a::before { color: var(--primary-color); }
.complementary-lesson-item a:hover { background-color: var(--secondary-color); color: var(--button-text-color); border-color: var(--secondary-color); transform: translateY(-2px); }
 .complementary-lesson-item a:hover::before { color: var(--button-text-color); opacity: 1; }
 body.dark-mode .complementary-lesson-item a:hover { background-color: var(--primary-color); border-color: var(--primary-color); color: var(--button-text-color); }
  body.dark-mode .complementary-lesson-item a:hover::before { color: var(--button-text-color); }


/* --- Estilos Painéis Flutuantes (Notepad, Vídeo, Chat) --- */
#floating-notepad, #floating-video, #floating-chat { position: fixed !important; width: var(--panel-width); max-height: calc(100vh - 100px); background-color: var(--container-bg) !important; border: 1px solid var(--border-color) !important; border-radius: 8px !important; box-shadow: 0 5px 15px var(--shadow-color) !important; padding: 15px; z-index: 1000 !important; display: flex; flex-direction: column; /* overflow: auto; */ /* Removido, controlado abaixo */ transition: transform 0.4s cubic-bezier(0.25, 0.8, 0.25, 1), opacity 0.4s ease-in-out, visibility 0s linear 0.4s, background-color 0.3s ease, border-color 0.3s ease !important; opacity: 0; visibility: hidden; }
#floating-notepad { top: 75px; right: var(--panel-margin); transform: translateX(calc(100% + var(--panel-margin) + 20px)); overflow-y: auto; overflow-x: hidden; }
body.notepad-visible #floating-notepad { transform: translateX(0); opacity: 1; visibility: visible; transition-delay: 0s !important; }
#notepad-area { width: 100%; flex-grow: 1; border: 1px solid var(--border-color); border-radius: 4px; font-family: sans-serif; font-size: 1em; line-height: 1.5; resize: vertical; outline: none; padding: 10px; background-color: var(--white-color); color: var(--text-color); transition: background-color 0.3s ease, color 0.3s ease, border-color 0.3s ease; min-height: 300px; box-sizing: border-box; }
body.dark-mode #notepad-area { background-color: var(--section-even-bg); }
#floating-notepad::-webkit-scrollbar { width: 6px; } #floating-notepad::-webkit-scrollbar-track { background: transparent; } #floating-notepad::-webkit-scrollbar-thumb { background-color: var(--text-muted); border-radius: 3px; border: 1px solid var(--container-bg); } #floating-notepad::-webkit-scrollbar-thumb:hover { background-color: var(--text-color); }
#floating-notepad { scrollbar-width: thin; scrollbar-color: var(--text-muted) transparent; }
#floating-video { top: 75px; left: var(--panel-margin); transform: translateX(calc(-100% - var(--panel-margin) - 20px)); padding: 10px !important; overflow: hidden; }
body.video-visible #floating-video { transform: translateX(0); opacity: 1; visibility: visible; transition-delay: 0s !important; }
#floating-video .video-container { position: relative; padding-bottom: 56.25%; height: 0; overflow: hidden; width: 100%; max-width: 100%; margin: 0; border-radius: 5px; background-color: #000; }
#floating-video .video-container iframe { position: absolute; top: 0; left: 0; width: 100%; height: 100%; border: 0; }
#floating-chat { bottom: var(--panel-margin); right: var(--panel-margin); width: var(--chat-width); height: var(--chat-height); max-height: calc(100vh - 40px); transform: translateY(calc(100% + var(--panel-margin) + 20px)); padding: 0; overflow: hidden; }
body.chat-visible #floating-chat { transform: translateY(0); opacity: 1; visibility: visible; transition-delay: 0s !important; }
#chatbox { width: 100%; height: 100%; border: none; display: flex; flex-direction: column; background-color: transparent; box-shadow: none; border-radius: 0; overflow: hidden; }
#chatOutput { flex-grow: 1; overflow-y: auto; padding: 15px; border-bottom: 1px solid var(--border-color); background-color: var(--section-odd-bg); display: flex; flex-direction: column; }
body.dark-mode #chatOutput { background-color: var(--section-odd-bg); border-bottom-color: var(--border-color); }
#chatOutput::-webkit-scrollbar { width: 6px; } #chatOutput::-webkit-scrollbar-track { background: transparent; margin: 2px;} #chatOutput::-webkit-scrollbar-thumb { background-color: var(--text-muted); border-radius: 3px; } #chatOutput::-webkit-scrollbar-thumb:hover { background-color: var(--text-color); }
#chatOutput { scrollbar-width: thin; scrollbar-color: var(--text-muted) transparent; }
#chatInputContainer { display: flex; padding: 10px; border-top: 1px solid var(--border-color); background-color: var(--section-even-bg); flex-shrink: 0; }
body.dark-mode #chatInputContainer { border-top-color: var(--border-color); background-color: var(--section-even-bg); }
#chatInput { flex-grow: 1; padding: 10px; border: 1px solid var(--border-color); border-radius: 20px; margin-right: 10px; background-color: var(--container-bg); color: var(--text-color); }
body.dark-mode #chatInput { background-color: var(--container-bg); border-color: var(--border-color); color: var(--text-color); }
#sendButton { padding: 10px 20px; background-color: var(--primary-color); color: var(--button-text-color); border: none; border-radius: 20px; cursor: pointer; transition: background-color 0.3s ease; }
#sendButton:hover { background-color: var(--secondary-color); }
body.dark-mode #sendButton { color: var(--button-text-color); }
.message { padding: 8px 12px; margin-bottom: 10px; border-radius: 15px; max-width: 85%; word-wrap: break-word; line-height: 1.4; }
.user-message { background-color: var(--secondary-color); color: var(--button-text-color); align-self: flex-end; text-align: right; }
body.dark-mode .user-message { background-color: var(--primary-color); color: var(--button-text-color); }
.bot-message { background-color: var(--section-even-bg); color: var(--text-color); align-self: flex-start; text-align: left; }
body.dark-mode .bot-message { background-color: var(--section-even-bg); color: var(--text-color); }
.error-message { background-color: var(--danger-bg-light); color: var(--danger-color); font-style: italic; align-self: flex-start; text-align: left; border: 1px solid var(--danger-color); }
body.dark-mode .error-message { background-color: var(--danger-bg-light); color: var(--danger-color); border-color: var(--danger-color); }
.typing-indicator { color: var(--text-muted); font-style: italic; align-self: flex-start; padding: 5px 12px; }
@media (max-width: 1100px) { #floating-notepad, #floating-video, #notepad-toggle-btn, #video-toggle-btn { display: none !important; } }
@media (max-width: 768px) { #floating-chat, #chat-toggle-btn { display: none !important; } }

/* --- Estilos Específicos Lição --- */
.lesson-content { padding: 0; } /* Garante que não haja padding no main */
section { /* Estilos padrão para seções de conteúdo */
    border-bottom: 1px solid var(--border-color);
    transition: background-color 0.3s ease, border-color 0.3s ease;
    position: relative;
}
section:nth-of-type(odd) { background-color: var(--section-odd-bg); }
section:nth-of-type(even) { background-color: var(--section-even-bg); }
section:last-of-type { border-bottom: none; }

h2.collapsible-trigger { color: var(--primary-color); font-weight: 700; font-size: 1.6em; margin: 0 !important; padding: 20px 60px 20px 30px !important; cursor: pointer; position: relative; user-select: none; transition: background-color 0.2s ease, color 0.3s ease; display: flex; align-items: center; }
h2.collapsible-trigger:hover { background-color: rgba(0, 123, 255, 0.05); } body.dark-mode h2.collapsible-trigger:hover { background-color: rgba(88, 166, 255, 0.1); }
h2.collapsible-trigger i.section-icon { font-size: 0.9em; margin-right: 12px; color: var(--secondary-color); width: 25px; text-align: center; transition: color 0.3s ease; flex-shrink: 0; }
h2.collapsible-trigger .toggle-icon { position: absolute; right: 25px; top: 50%; transform: translateY(-50%) rotate(0deg); font-size: 0.8em; color: var(--text-muted); transition: transform 0.3s ease-out; }
h2.collapsible-trigger.active .toggle-icon { transform: translateY(-50%) rotate(180deg); }
/* Ajuste para conteúdo collapsible DENTRO das lições */
.lesson-content .collapsible-content { padding-left: 30px; padding-right: 30px; border-left: none; border-right: none; border-bottom: none; border-radius: 0; background-color: transparent; }
.lesson-content .collapsible-content.open { border-top: 1px solid var(--border-color); }
body.dark-mode .lesson-content .collapsible-content { background-color: transparent; }
.collapsible-content.open > *:last-child { margin-bottom: 0 !important; }
.collapsible-content.open > .check-section-btn { margin-top: 30px !important; margin-bottom: 0 !important; }
.collapsible-content.open > .section-feedback { margin-top: 15px !important; padding-bottom: 0 !important; margin-bottom: 0 !important; }

/* --- Estilos de Conteúdo Comum --- */
h3 { color: var(--secondary-color); font-weight: 500; font-size: 1.3em; margin-top: 25px; margin-bottom: 15px; transition: color 0.3s ease;} h3:first-child { margin-top: 0; }
h4 { color: var(--primary-color); font-weight: 500; font-size: 1.1em; margin-top: 20px; margin-bottom: 10px; transition: color 0.3s ease;}
p { margin-bottom: 15px; } ul, ol { list-style-position: outside; margin-left: 20px; margin-bottom: 15px; padding-left: 15px; } li { margin-bottom: 10px; }
code { background-color: var(--code-bg-color); color: var(--primary-color); padding: 3px 7px; border-radius: 4px; font-family: 'Courier New', Courier, monospace; font-size: 0.95em; font-weight: 600; white-space: nowrap; transition: background-color 0.3s ease, color 0.3s ease;} body.dark-mode code { color: var(--secondary-color); }
.code-block { display: block; background-color: var(--code-bg-color); color: var(--text-color); padding: 15px; margin: 15px 0; white-space: pre-wrap; border: 1px solid var(--border-color); border-left: 3px solid var(--secondary-color); border-radius: 4px; font-family: 'Courier New', Courier, monospace; font-size: 0.9em; transition: background-color 0.3s ease, color 0.3s ease, border-color 0.3s ease;} body.dark-mode .code-block { color: var(--text-color); }
.example { font-style: italic; color: var(--text-muted); margin-left: 15px; display: block; margin-top: -5px; margin-bottom: 15px; padding-left: 10px; border-left: 2px solid var(--border-color); transition: color 0.3s ease, border-color 0.3s ease;}
strong { font-weight: 700; } .explanation-section strong, .reading-text strong { color: var(--primary-color); transition: color 0.3s ease;}
.note { background-color: var(--note-bg); border-left: 5px solid var(--note-border); padding: 15px 20px; margin: 25px 0; font-size: 0.95em; border-radius: 0 4px 4px 0; transition: background-color 0.3s ease, border-color 0.3s ease; color: #544510; } body.dark-mode .note { color: #fce588; } .note strong { color: var(--primary-color); } body.dark-mode .note strong { color: var(--secondary-color); }
.complementary-note { background-color: var(--section-even-bg); border: 1px dashed var(--border-color); padding: 12px 18px; margin-top: 25px; border-radius: 4px; font-size: 0.9em; color: var(--text-muted); transition: background-color 0.3s ease, border-color 0.3s ease, color 0.3s ease; } .complementary-note strong { color: var(--primary-color); font-weight: 600; } body.dark-mode .complementary-note { background-color: var(--light-gray); } body.dark-mode .complementary-note strong { color: var(--secondary-color); } .complementary-note a { color: var(--primary-color); font-weight: 600; text-decoration: underline; transition: color 0.2s ease; } .complementary-note a:hover { color: var(--secondary-color); } body.dark-mode .complementary-note a { color: var(--secondary-color); } body.dark-mode .complementary-note a:hover { color: var(--primary-color); }
.time-expressions { font-weight: 500; color: var(--secondary-color); transition: color 0.3s ease;}
.reading-text { background-color: var(--section-even-bg); padding: 20px; border-radius: 5px; border: 1px solid var(--border-color); margin-bottom: 25px; box-shadow: 0 1px 3px var(--shadow-color); transition: background-color 0.3s ease, border-color 0.3s ease;}
.audio-player-container { margin-bottom: 20px; text-align: center; } audio { width: 100%; max-width: 500px; margin: 10px 0; } body.dark-mode audio { filter: invert(1) hue-rotate(180deg); }
.transcript { background-color: var(--section-even-bg); border: 1px dashed var(--border-color); padding: 15px; margin-top: 15px; border-radius: 4px; font-family: 'Courier New', Courier, monospace; font-size: 0.9em; color: var(--text-muted); transition: background-color 0.3s ease, border-color 0.3s ease, color 0.3s ease;}
textarea#writing-area, textarea#notepad-area { width: 100%; min-height: 150px; padding: 15px; border: 1px solid var(--border-color); border-radius: 4px; font-family: 'Poppins', sans-serif; font-size: 1em; line-height: 1.6; margin-top: 10px; background-color: var(--section-odd-bg); color: var(--text-color); transition: background-color 0.3s ease, color 0.3s ease, border-color 0.3s ease, box-shadow 0.2s ease; resize: vertical; }
textarea#writing-area:focus, textarea#notepad-area:focus { border-color: var(--secondary-color); outline: none; box-shadow: 0 0 0 3px rgba(0, 123, 255, 0.15); }
body.dark-mode textarea#writing-area, body.dark-mode textarea#notepad-area { background-color: var(--section-even-bg); }
#modelAnswer { background-color: var(--section-even-bg); border: 1px dashed var(--border-color); padding: 15px; margin-top: 15px; border-radius: 4px; font-size: 0.95em; color: var(--text-muted); transition: background-color 0.3s ease, border-color 0.3s ease, color 0.3s ease;}

/* --- Estilos dos Exercícios Interativos --- */
.interactive-exercise { margin-top: 25px; padding: 25px; background-color: var(--section-even-bg); border: 1px solid var(--border-color); border-radius: 6px; transition: background-color 0.3s ease, border-color 0.3s ease;} .interactive-exercise > .question-item:first-child { margin-top: 0; }
.question-item { background-color: var(--section-odd-bg); border: 1px solid var(--border-color); border-left: 4px solid transparent; border-radius: 6px; padding: 20px; margin-bottom: 20px; transition: border-color 0.3s ease, background-color 0.3s ease, box-shadow 0.3s ease, border-left-color 0.3s ease; position: relative; box-shadow: 0 2px 4px var(--shadow-color); } .question-item:last-child { margin-bottom: 0; } .question-item:hover { border-left-color: var(--secondary-color); box-shadow: 0 4px 8px var(--shadow-color); }
.question-item p.question-text { margin-bottom: 15px; font-weight: 500; line-height: 1.8; } .mcq-options { margin-top: 10px; } .mcq-options label { display: block; margin-bottom: 10px; cursor: pointer; padding: 10px 15px; border-radius: 4px; border: 1px solid var(--border-color); background-color: var(--white-color); transition: background-color 0.2s ease, border-color 0.2s ease; } body.dark-mode .mcq-options label { background-color: var(--section-even-bg); } .mcq-options label:hover { background-color: rgba(0, 123, 255, 0.08); border-color: var(--secondary-color); } body.dark-mode .mcq-options label:hover { background-color: rgba(88, 166, 255, 0.15); } .mcq-options input[type="radio"] { margin-right: 12px; accent-color: var(--primary-color); transform: scale(1.1); vertical-align: middle; }
.gap-fill-input, .error-correction-input, .unscramble-input { padding: 8px 12px; border: 1px solid var(--border-color); border-radius: 4px; font-size: 0.95em; font-family: 'Poppins', sans-serif; margin: 0 5px; background-color: var(--white-color); color: var(--text-color); transition: border-color 0.2s ease, background-color 0.3s ease, color 0.3s ease, box-shadow 0.2s ease; min-width: 100px; } body.dark-mode .gap-fill-input, body.dark-mode .error-correction-input, body.dark-mode .unscramble-input { background-color: var(--bg-color); } .gap-fill-input:focus, .error-correction-input:focus, .unscramble-input:focus { border-color: var(--secondary-color); outline: none; box-shadow: 0 0 0 3px rgba(0, 123, 255, 0.15); }
.verb-in-brackets { font-style: italic; color: var(--text-muted); font-size: 0.9em; margin-left: 3px; transition: color 0.3s ease;} .error-correction-input, .unscramble-input { width: 95%; margin-top: 8px; display: block; } .words-to-unscramble { font-style: italic; color: var(--text-muted); margin-top: 8px; margin-bottom: 5px; display: block; background-color: var(--section-even-bg); padding: 8px 10px; border-radius: 3px; font-size: 0.9em; transition: color 0.3s ease, background-color 0.3s ease;} .error-sentence { color: var(--danger-color); text-decoration: line-through; margin-right: 8px; font-style: italic; font-weight: 500;}
.feedback-icon { position: absolute; top: 15px; right: 15px; font-size: 1.6em; font-weight: bold; opacity: 0; transition: opacity 0.3s ease, transform 0.3s ease; transform: scale(0.5); } .feedback-icon.visible { opacity: 0.9; transform: scale(1); } .feedback-icon.correct::before { content: '\f00c'; font-family: 'Font Awesome 6 Free'; font-weight: 900; color: var(--success-color); } .feedback-icon.incorrect::before { content: '\f00d'; font-family: 'Font Awesome 6 Free'; font-weight: 900; color: var(--danger-color); }
.correct-answer-display { font-size: 0.9em; color: var(--secondary-color); font-weight: 600; margin-top: 12px; display: block; padding-top: 10px; border-top: 1px dashed var(--border-color); transition: color 0.3s ease, border-color 0.3s ease;} .correct-answer-display:empty { display: none; padding-top: 0; margin-top: 0; border-top: none; }
.question-item.correct { border-left-color: var(--success-color); background-color: var(--success-bg-light); box-shadow: 0 4px 8px rgba(40, 167, 69, 0.1);} .question-item.incorrect { border-left-color: var(--danger-color); background-color: var(--danger-bg-light); box-shadow: 0 4px 8px rgba(220, 53, 69, 0.1);}
.gap-fill-input.correct-input, .error-correction-input.correct-input, .unscramble-input.correct-input { border-color: var(--success-color); background-color: var(--success-bg-light); } .gap-fill-input.incorrect-input, .error-correction-input.incorrect-input, .unscramble-input.incorrect-input { border-color: var(--danger-color); background-color: var(--danger-bg-light); }
body.dark-mode .gap-fill-input.correct-input, body.dark-mode .error-correction-input.correct-input, body.dark-mode .unscramble-input.correct-input { background-color: rgba(46, 160, 67, 0.1); } body.dark-mode .gap-fill-input.incorrect-input, body.dark-mode .error-correction-input.incorrect-input, body.dark-mode .unscramble-input.incorrect-input { background-color: rgba(219, 55, 69, 0.1); }

/* --- VOCAB DRAG & DROP --- */
.vocab-drag-drop-container { display: flex; flex-wrap: wrap; gap: 25px; margin-top: 20px; padding: 20px; background: var(--section-odd-bg); border-radius: 6px; border: 1px solid var(--border-color); transition: background-color 0.3s ease, border-color 0.3s ease;} .vocab-definitions { flex: 2; min-width: 300px; } .vocab-words { flex: 1; min-width: 180px; background-color: var(--section-even-bg); padding: 20px; border-radius: 6px; border: 1px dashed var(--border-color); transition: background-color 0.3s ease, border-color 0.3s ease; align-self: flex-start; } .vocab-words h4, .vocab-definitions h4 { margin-top: 0; margin-bottom: 15px; color: var(--primary-color); font-size: 1.1em;} .definition-item { margin-bottom: 15px; padding: 10px; border: 1px solid var(--border-color); border-radius: 4px; display: flex; align-items: center; background-color: var(--white-color); transition: border-color 0.3s ease, background-color 0.3s ease;} body.dark-mode .definition-item { background-color: var(--section-even-bg); } .drop-zone { min-width: 120px; min-height: 40px; border: 2px dashed var(--border-color); margin-right: 15px; display: inline-flex; align-items: center; justify-content: center; padding: 5px 10px; background-color: var(--light-gray); border-radius: 4px; transition: background-color 0.2s ease, border-color 0.2s ease, border-style 0.2s; color: var(--text-muted); font-style: italic; font-size: 0.9em; flex-shrink: 0; } body.dark-mode .drop-zone { background-color: var(--container-bg); } .drop-zone.over { background-color: #cce5ff; border-color: var(--secondary-color); border-style: solid; } body.dark-mode .drop-zone.over { background-color: rgba(88, 166, 255, 0.2); } .drop-zone.correct { border-color: var(--success-color); border-style: solid; border-width: 1px; color: var(--text-color); font-style: normal; padding: 0; background-color: transparent; min-width: auto; } .drop-zone.correct .draggable-word { box-shadow: none; border: none; margin: 0; padding: 4px 6px; font-size: 0.95em; background-color: transparent !important; border: 1px solid var(--success-color) !important; color: var(--text-color) !important; cursor: default; } body.dark-mode .drop-zone.correct .draggable-word { border-color: var(--success-color) !important; color: var(--text-color) !important;} .drop-zone.incorrect { border-color: var(--danger-color); border-style: solid; animation: shake 0.5s; } .draggable-word { display: inline-block; padding: 8px 14px; margin: 5px; background-color: var(--secondary-color); color: var(--button-text-color); border-radius: 4px; cursor: grab; user-select: none; border: 1px solid var(--primary-color); box-shadow: 1px 1px 3px rgba(0,0,0,0.2); transition: opacity 0.2s ease, background-color 0.3s ease, color 0.3s ease, box-shadow 0.2s ease; font-size: 0.95em; font-weight: 500; } body.dark-mode .draggable-word { color: var(--button-text-color); background-color: var(--secondary-color); border-color: var(--primary-color); } .draggable-word.dragging { opacity: 0.5; cursor: grabbing; box-shadow: none; } .draggable-word.placed { opacity: 0.4; cursor: default; background-color: var(--text-muted); border-color: var(--text-muted); box-shadow: none; } .definition-text { margin-left: 5px; flex-grow: 1; font-size: 0.95em; } @keyframes shake { 0%, 100% { transform: translateX(0); } 25% { transform: translateX(-5px); } 75% { transform: translateX(5px); } }

/* --- Botões Gerais --- */
.check-section-btn { display: block; width: fit-content; margin: 25px auto 15px auto; padding: 10px 25px; background-color: var(--secondary-color); color: var(--button-text-color); border: none; border-radius: 5px; font-size: 1em; font-weight: 500; cursor: pointer; transition: background-color 0.3s ease, transform 0.1s ease, color 0.3s ease, box-shadow 0.3s ease; box-shadow: 0 2px 4px var(--shadow-color); } .check-section-btn:hover { background-color: var(--primary-color); box-shadow: 0 3px 6px var(--shadow-color);} .check-section-btn:active { transform: scale(0.98); } .check-section-btn i { margin-right: 8px; } body.dark-mode .check-section-btn { color: var(--button-text-color); }
.toggle-button { background-color: var(--text-muted); color: white; border: none; padding: 8px 15px; border-radius: 4px; cursor: pointer; margin-top: 15px; font-size: 0.9em; transition: background-color 0.2s ease; } .toggle-button:hover { background-color: var(--text-color); } .toggle-button i { margin-right: 6px; }

/* --- Feedback da Seção (Pontuação) --- */
.section-feedback { margin-top: 10px; padding: 10px 0 0 0; border-radius: 5px; font-weight: 600; text-align: center; font-size: 1.05em; min-height: 20px; transition: opacity 0.3s ease, color 0.3s ease; opacity: 0; max-height: 0; overflow: hidden; } .section-feedback.visible { opacity: 1; max-height: 50px; } .section-feedback.feedback-correct { color: var(--success-color); } .section-feedback.feedback-partially-correct { color: #fd7e14; } .section-feedback.feedback-incorrect { color: var(--danger-color); }

/* --- Estilos para Fonemas Clicáveis --- */
.phoneme-audio { cursor: pointer; color: var(--secondary-color); font-weight: bold; border-bottom: 1px dotted var(--secondary-color); transition: color 0.2s ease, border-color 0.2s ease; }
.phoneme-audio:hover { color: var(--primary-color); border-bottom-color: var(--primary-color); }
body.dark-mode .phoneme-audio { color: var(--secondary-color); border-bottom-color: var(--secondary-color); }
body.dark-mode .phoneme-audio:hover { color: var(--primary-color); border-bottom-color: var(--primary-color); }

/* --- Classe Utilitária --- */
.hidden { display: none !important; }

/* --- Media Queries Específicos Lição/Índice --- */
@media (max-width: 940px) {
     .lesson-header h1 { font-size: 1.5em; margin-right: 10px;}
     .header-controls { gap: 10px;}
     #lesson-search { max-width: 120px;} /* Aplica ao índice */
     #lesson-search:focus { max-width: 180px; }
}
@media (max-width: 768px) {
    .container { padding: 0; } /* Remove padding lateral no container */
    .index-section { margin: 20px; } /* Reduz margens laterais das seções do índice */
    #instructor-intro-content { padding: 25px 20px; } /* Adiciona padding lateral na intro */
    #lesson-grid { grid-template-columns: repeat(2, 1fr); gap: 15px; }
    .lesson-grid-button { min-height: 130px; padding: 15px;}
    .complementary-lesson-list { grid-template-columns: repeat(auto-fit, minmax(170px, 1fr)); }
    .index-section-title { font-size: 1.4em; padding: 15px 50px 15px 20px; }
}
@media (max-width: 520px) {
     .search-container { display: none; } /* Esconde busca inline no índice */
     #search-toggle-btn { display: none; } /* Esconde botão toggle se usado */
     #search-bar-container { display: none !important; }
     .lesson-header h1 { margin-right: 0; }
     .header-controls { justify-content: flex-end; }
}
@media (max-width: 480px) {
     .index-section { margin: 15px; }
     #instructor-intro-content { padding: 20px 15px; }
    #lesson-grid { grid-template-columns: 1fr; gap: 10px; }
    .lesson-grid-button { min-height: auto; padding: 12px; }
    .lesson-grid-button .title { font-size: 1em; }
     .complementary-lesson-list { grid-template-columns: 1fr; gap: 8px;}
     .complementary-group-title { font-size: 1em; }
     .social-btn { min-width: auto; padding: 8px 12px; }
     .social-btn i { margin-right: 5px; font-size: 1.1em;}
     .index-section-title { font-size: 1.3em; padding: 12px 45px 12px 15px; }
}