/* ============================================
   APOSTILA DE INFORMÁTICA - CSS CUSTOMIZADO
   Paleta: Preto (#000000), Branco (#FFFFFF), Vermelho (#FF0000)
   ============================================ */

:root {
    --color-black: #000000;
    --color-white: #FFFFFF;
    --color-red: #FF0000;
    --color-light-gray: #f8f9fa;
    --color-dark-gray: #343a40;
    --color-border-gray: #dee2e6;
    --spacing-unit: 1rem;
}

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

html, body {
    height: 100%;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    color: var(--color-black);
}

body {
    background-color: var(--color-white);
}

/* ============================================
   SIDEBAR
   ============================================ */

.sidebar {
    width: 320px;
    background-color: var(--color-black) !important;
    border-right: 3px solid var(--color-red);
    overflow-y: auto;
    overflow-x: hidden;
    min-height: 100vh;
    max-height: 100vh;
    position: sticky;
    top: 0;
    flex-shrink: 0;
}

.sidebar-header h3 {
    font-weight: 700;
    letter-spacing: 0.5px;
    border-bottom: 2px solid var(--color-red);
    padding-bottom: 0.75rem;
}

.sidebar-header p {
    font-size: 0.85rem;
    color: #999;
    margin-top: 0.5rem;
}

.sidebar .nav-link {
    color: #ccc !important;
    padding: 0.85rem 1.25rem;
    border-radius: 0.5rem;
    transition: all 0.3s ease;
    border-left: 3px solid transparent;
    font-weight: 500;
    white-space: normal;
    word-wrap: break-word;
    font-size: 0.95rem;
    line-height: 1.4;
    display: block;
}

.sidebar .nav-link:hover {
    background-color: rgba(255, 0, 0, 0.1);
    color: var(--color-red) !important;
    border-left-color: var(--color-red);
}

.sidebar .nav-link.active {
    background-color: var(--color-red);
    color: var(--color-white) !important;
    border-left-color: var(--color-white);
    box-shadow: 0 2px 8px rgba(255, 0, 0, 0.3);
}

/* ============================================
   PROGRESS BOX (SIDEBAR)
   ============================================ */

.progress-box {
    background-color: rgba(255, 0, 0, 0.05);
    border: 1px solid rgba(255, 0, 0, 0.2);
    border-radius: 0.5rem;
    padding: 1rem;
}

.progress-box .progress {
    background-color: rgba(255, 0, 0, 0.1);
    border-radius: 10px;
}

/* ============================================
   HEADER
   ============================================ */

header {
    background-color: var(--color-red) !important;
    border-bottom: 3px solid var(--color-black);
}

header h1 {
    font-weight: 700;
    letter-spacing: 0.5px;
}

header p {
    font-size: 0.95rem;
}

/* ============================================
   MAIN CONTENT
   ============================================ */

main {
    flex-grow: 1;
    background-color: var(--color-light-gray);
}

.container-fluid {
    background-color: var(--color-light-gray);
}

/* ============================================
   ALERTS
   ============================================ */

.bg-light-info {
    background-color: #e7f3ff !important;
    border: 2px solid var(--color-red);
    border-radius: 0.75rem;
}

.bg-light-info h4 {
    color: var(--color-red);
}

/* ============================================
   CARDS
   ============================================ */

.info-card {
    background-color: var(--color-white);
    border: 2px solid var(--color-border-gray);
    border-radius: 0.75rem;
    transition: all 0.3s ease;
    cursor: pointer;
}

.info-card:hover {
    border-color: var(--color-red);
    box-shadow: 0 4px 12px rgba(255, 0, 0, 0.2);
    transform: translateY(-2px);
}

.info-card.border-left-danger {
    border-left: 4px solid var(--color-red) !important;
}

/* ============================================
   MODULE CARDS (HOME PAGE)
   ============================================ */

.module-card {
    background-color: var(--color-white);
    border: 2px solid var(--color-border-gray);
    border-radius: 0.75rem;
    transition: all 0.3s ease;
    cursor: pointer;
    overflow: hidden;
    text-decoration: none;
    color: inherit;
    display: block;
    height: 100%;
}

.module-card:hover {
    border-color: var(--color-red);
    box-shadow: 0 6px 20px rgba(255, 0, 0, 0.25);
    transform: translateY(-4px);
}

.module-card .icon-wrapper {
    background: linear-gradient(135deg, var(--color-red) 0%, #cc0000 100%);
    color: var(--color-white);
    padding: 2rem;
    text-align: center;
    font-size: 2.5rem;
}

.module-card .content {
    padding: 1.5rem;
}

.module-card h5 {
    color: var(--color-black);
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.module-card p {
    font-size: 0.9rem;
    color: #666;
    margin-bottom: 0;
}

.module-card .badge {
    background-color: var(--color-red);
    color: var(--color-white);
    font-weight: 600;
    font-size: 0.75rem;
    padding: 0.4rem 0.8rem;
    margin-top: 0.5rem;
    display: inline-block;
}

/* ============================================
   BUTTONS
   ============================================ */

.btn-danger {
    background-color: var(--color-red) !important;
    border-color: var(--color-red) !important;
    color: var(--color-white) !important;
    font-weight: 600;
    padding: 0.75rem 1.5rem;
    border-radius: 0.5rem;
    transition: all 0.3s ease;
}

.btn-danger:hover {
    background-color: #cc0000 !important;
    border-color: #cc0000 !important;
    box-shadow: 0 4px 8px rgba(255, 0, 0, 0.3);
    transform: translateY(-2px);
}

.btn-outline-danger {
    color: var(--color-red) !important;
    border-color: var(--color-red) !important;
    font-weight: 600;
    padding: 0.75rem 1.5rem;
    border-radius: 0.5rem;
    transition: all 0.3s ease;
}

.btn-outline-danger:hover {
    background-color: var(--color-red) !important;
    border-color: var(--color-red) !important;
    color: var(--color-white) !important;
}

/* ============================================
   BREADCRUMB
   ============================================ */

.breadcrumb {
    background-color: transparent;
    padding: 0;
    margin-bottom: 1.5rem;
}

.breadcrumb-item.active {
    color: var(--color-black);
    font-weight: 600;
}

.breadcrumb a {
    color: var(--color-red);
    text-decoration: none;
}

.breadcrumb a:hover {
    text-decoration: underline;
}

/* ============================================
   TYPOGRAPHY
   ============================================ */

h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    color: var(--color-black);
}

h2.text-danger {
    color: var(--color-red) !important;
}

h3.text-danger {
    color: var(--color-red) !important;
}

.text-danger {
    color: var(--color-red) !important;
}

/* ============================================
   EXERCISES - DUOLINGO STYLE
   ============================================ */

.exercise-container {
    background-color: var(--color-white);
    border: 2px solid var(--color-border-gray);
    border-radius: 0.75rem;
    padding: 2rem;
    margin-bottom: 2rem;
}

.exercise-question {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--color-black);
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 2px solid var(--color-red);
}

.exercise-answers {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.answer-button {
    background-color: var(--color-white);
    border: 2px solid var(--color-border-gray);
    border-radius: 0.5rem;
    padding: 1rem;
    text-align: left;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.3s ease;
    color: var(--color-black);
    font-weight: 500;
}

.answer-button:hover:not(:disabled) {
    border-color: var(--color-red);
    background-color: #fff5f5;
}

.answer-button.selected {
    border-color: var(--color-red);
    background-color: #fff5f5;
}

.answer-button.correct {
    border-color: #28a745;
    background-color: #d4edda;
    color: #155724;
    font-weight: 600;
}

.answer-button.incorrect {
    border-color: var(--color-red);
    background-color: #f8d7da;
    color: #721c24;
    font-weight: 600;
}

.answer-button:disabled {
    cursor: not-allowed;
    opacity: 0.8;
}

.exercise-feedback {
    margin-top: 1.5rem;
    padding: 1rem;
    border-radius: 0.5rem;
    font-weight: 600;
    display: none;
}

.exercise-feedback.show {
    display: block;
}

.exercise-feedback.correct {
    background-color: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}

.exercise-feedback.incorrect {
    background-color: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}

/* ============================================
   THEORY BOXES
   ============================================ */

.theory-box {
    background-color: var(--color-white);
    border-left: 4px solid var(--color-red);
    border-radius: 0.5rem;
    padding: 1.5rem;
    margin-bottom: 1.5rem;
}

.theory-box h4 {
    color: var(--color-red);
    margin-bottom: 0.75rem;
}

.example-box {
    background-color: #f0f0f0;
    border-left: 4px solid var(--color-black);
    border-radius: 0.5rem;
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    font-family: 'Courier New', monospace;
    font-size: 0.95rem;
}

.example-box h5 {
    color: var(--color-black);
    margin-bottom: 0.75rem;
}

/* ============================================
   VISUAL RESOURCES CARDS
   ============================================ */

.visual-card {
    background-color: var(--color-white);
    border: 2px solid var(--color-border-gray);
    border-radius: 0.75rem;
    padding: 1.5rem;
    transition: all 0.3s ease;
    height: 100%;
}

.visual-card:hover {
    border-color: var(--color-red);
    box-shadow: 0 4px 12px rgba(255, 0, 0, 0.1);
    transform: translateY(-3px);
}

.visual-emoji {
    filter: drop-shadow(2px 2px 4px rgba(0, 0, 0, 0.1));
}

.visual-card h6 {
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.visual-card .badge {
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* Diagramas e visualizações HTML customizadas */
.visual-diagram {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

.visual-diagram code {
    background-color: #f8f9fa;
    padding: 2px 6px;
    border-radius: 3px;
    font-family: 'Courier New', monospace;
    font-size: 14px;
    color: #d63384;
}

.visual-diagram table {
    width: 100%;
    font-size: 14px;
}

.visual-diagram h6 {
    font-weight: 600;
    margin-bottom: 1rem;
}

.summary-list {
    list-style: none;
    padding: 0;
}

.summary-list li {
    padding: 0.75rem 0;
    padding-left: 2rem;
    position: relative;
    color: var(--color-black);
}

.summary-list li:before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--color-red);
    font-weight: bold;
    font-size: 1.2rem;
}

/* ============================================
   MODAL
   ============================================ */

.modal-content {
    border: 2px solid var(--color-red);
    border-radius: 0.75rem;
}

.modal-header {
    background-color: var(--color-red);
    color: var(--color-white);
}

.modal-header .modal-title {
    font-weight: 700;
}

.modal-body {
    background-color: var(--color-light-gray);
}

/* ============================================
   SCROLLBAR CUSTOMIZADO
   ============================================ */

::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--color-light-gray);
}

::-webkit-scrollbar-thumb {
    background: var(--color-red);
    border-radius: 10px;
}

::-webkit-scrollbar-thumb:hover {
    background: #cc0000;
}

/* ============================================
   RESPONSIVE
   ============================================ */

@media (max-width: 768px) {
    .sidebar {
        width: 100%;
        min-height: auto;
        border-right: none;
        border-bottom: 3px solid var(--color-red);
        padding: 1rem;
        position: relative;
        max-height: none;
    }

    .d-flex {
        flex-direction: column;
    }

    main {
        min-height: auto;
    }

    header h1 {
        font-size: 1.5rem;
    }

    .exercise-container {
        padding: 1rem;
    }

    .answer-button {
        padding: 0.75rem;
        font-size: 0.9rem;
    }

    .module-card .icon-wrapper {
        font-size: 2rem;
        padding: 1.5rem;
    }
}

@media (min-width: 769px) and (max-width: 1024px) {
    .sidebar {
        width: 280px;
    }
}

/* Garantir que ícones não sejam cortados */
.sidebar .nav-link i {
    margin-right: 0.75rem;
    width: 1.25rem;
    text-align: center;
    flex-shrink: 0;
}

.sidebar ul {
    padding-left: 0;
    margin-bottom: 0;
}

.sidebar .nav {
    gap: 0.5rem;
}

/* ============================================
   UTILITY CLASSES
   ============================================ */

.bg-light-red {
    background-color: #fff5f5;
}

.border-left-danger {
    border-left: 4px solid var(--color-red) !important;
}

.text-white-50 {
    color: rgba(255, 255, 255, 0.5) !important;
}

.shadow-sm {
    box-shadow: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.075) !important;
}