/* Learn Platform - Główny styl */

:root {
    --primary: #4f46e5;
    --primary-dark: #4338ca;
    --secondary: #64748b;
    --success: #22c55e;
    --warning: #f59e0b;
    --danger: #ef4444;
    --light: #f8fafc;
    --dark: #1e293b;
    --border: #e2e8f0;
    --shadow: 0 1px 3px rgba(0,0,0,0.1);
    --shadow-lg: 0 10px 25px rgba(0,0,0,0.1);
}

* {
    box-sizing: border-box;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    color: var(--dark);
    background: #fff;
    line-height: 1.6;
}

/* Navbar */
.navbar {
    background: linear-gradient(135deg, var(--dark) 0%, #0f172a 100%);
    box-shadow: var(--shadow);
}

.navbar-brand {
    font-weight: 700;
    font-size: 1.25rem;
}

/* Main content */
.main-content {
    min-height: calc(100vh - 200px);
    padding-top: 1rem;
}

/* Breadcrumbs */
.breadcrumbs {
    margin-bottom: 1.5rem;
}

.breadcrumbs ol {
    display: flex;
    flex-wrap: wrap;
    list-style: none;
    padding: 0;
    margin: 0;
    background: var(--light);
    border-radius: 0.5rem;
    padding: 0.75rem 1rem;
}

.breadcrumbs li {
    display: flex;
    align-items: center;
}

.breadcrumbs li:not(:last-child)::after {
    content: "/";
    margin: 0 0.75rem;
    color: var(--secondary);
}

.breadcrumbs a {
    color: var(--primary);
    text-decoration: none;
    transition: color 0.2s;
}

.breadcrumbs a:hover {
    color: var(--primary-dark);
    text-decoration: underline;
}

/* Course cards */
.course-card {
    transition: transform 0.2s, box-shadow 0.2s;
    border: 1px solid var(--border);
    border-radius: 0.75rem;
    overflow: hidden;
}

.course-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.course-card .card-img-top {
    height: 200px;
    object-fit: cover;
}

.course-card .card-title {
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.course-card .card-text {
    flex-grow: 1;
}

/* Lesson content */
.lesson-content {
    font-size: 1.05rem;
}

.lesson-body h1,
.lesson-body h2,
.lesson-body h3 {
    margin-top: 1.5rem;
    margin-bottom: 1rem;
    font-weight: 600;
}

.lesson-body h1 { font-size: 2rem; }
.lesson-body h2 { font-size: 1.5rem; }
.lesson-body h3 { font-size: 1.25rem; }

.lesson-body p {
    margin-bottom: 1rem;
}

.lesson-body ul,
.lesson-body ol {
    margin-bottom: 1rem;
    padding-left: 1.5rem;
}

.lesson-body li {
    margin-bottom: 0.5rem;
}

.lesson-body img {
    max-width: 100%;
    height: auto;
    border-radius: 0.5rem;
    margin: 1rem 0;
}

/* Inline code */
.lesson-body code,
.page-content code {
    background: #f5f5f5;
    padding: 0.2rem 0.4rem;
    border-radius: 0.25rem;
    font-size: 0.9em;
    font-family: 'Fira Code', 'Consolas', 'Monaco', 'Courier New', monospace;
    color: #e83e8c;
}

/* Code blocks */
.lesson-body pre,
.page-content pre {
    background: #1e1e1e;
    color: #d4d4d4;
    padding: 1rem;
    border-radius: 0.5rem;
    overflow-x: auto;
    margin: 1rem 0;
    border: 1px solid #333;
}

.lesson-body pre code,
.page-content pre code {
    background: transparent;
    color: inherit;
    padding: 0;
    font-family: 'Fira Code', 'Consolas', 'Monaco', 'Courier New', monospace;
    font-size: 0.9rem;
    line-height: 1.5;
}

/* Syntax highlighting colors for code blocks */
.lesson-body pre code .language-python,
.lesson-body pre code .language-bash,
.lesson-body pre code .language-javascript,
.page-content pre code .language-python,
.page-content pre code .language-bash,
.page-content pre code .language-javascript {
    color: #d4d4d4;
}

/* Keywords */
.lesson-body pre code .keyword,
.page-content pre code .keyword {
    color: #569cd6;
}

/* Strings */
.lesson-body pre code .string,
.page-content pre code .string {
    color: #ce9178;
}

/* Numbers */
.lesson-body pre code .number,
.page-content pre code .number {
    color: #b5cea8;
}

/* Comments */
.lesson-body pre code .comment,
.page-content pre code .comment {
    color: #6a9955;
}

/* Functions */
.lesson-body pre code .function,
.page-content pre code .function {
    color: #dcdcaa;
}

/* Operators */
.lesson-body pre code .operator,
.page-content pre code .operator {
    color: #d4d4d4;
}

/* Quiz */
.quiz-section {
    background: var(--light);
    border: 1px solid var(--border);
}

.quiz-question {
    background: #fff;
    padding: 1.5rem;
    border-radius: 0.5rem;
    border: 1px solid var(--border);
    margin-bottom: 1rem;
}

.quiz-question p {
    margin-bottom: 1rem;
}

.quiz-options {
    margin-left: 0;
    padding-left: 0;
}

.quiz-options .form-check {
    padding: 0.75rem 1rem;
    border-radius: 0.5rem;
    transition: background 0.2s;
    margin-bottom: 0.5rem;
    border: 1px solid var(--border);
    display: flex;
    align-items: flex-start;
}

.quiz-options .form-check:hover {
    background: var(--light);
    border-color: var(--primary);
}

.quiz-options .form-check-input {
    float: left;
    margin-left: -0.5em;
    margin-top: 0.25rem;
    margin-right: 0.75rem;
    width: 1.25rem;
    height: 1.25rem;
    flex-shrink: 0;
}

.quiz-options .form-check-label {
    cursor: pointer;
    line-height: 1.4;
}

/* Quiz answer highlighting */
.quiz-option-correct {
    background-color: #d4edda !important;
    border-color: #28a745 !important;
    border-radius: 0.5rem;
    padding: 0.75rem 1rem !important;
    margin-bottom: 0.5rem;
}

.quiz-option-correct::before {
    content: '✓ ';
    color: #28a745;
    font-weight: bold;
}

.quiz-option-wrong {
    background-color: #f8d7da !important;
    border-color: #dc3545 !important;
    border-radius: 0.5rem;
    padding: 0.75rem 1rem !important;
    margin-bottom: 0.5rem;
}

.quiz-option-wrong::before {
    content: '✗ ';
    color: #dc3545;
    font-weight: bold;
}

/* Quiz question box highlighting */
.quiz-question-correct {
    background-color: #d4edda !important;
    border-color: #28a745 !important;
    border-width: 2px;
    border-style: solid;
}

.quiz-question-correct::before {
    content: '✓ Correct! ';
    color: #28a745;
    font-weight: bold;
    display: block;
    margin-bottom: 0.5rem;
}

.quiz-question-wrong {
    background-color: #f8d7da !important;
    border-color: #dc3545 !important;
    border-width: 2px;
    border-style: solid;
}

.quiz-question-wrong::before {
    content: '✗ Wrong! ';
    color: #dc3545;
    font-weight: bold;
    display: block;
    margin-bottom: 0.5rem;
}

.quiz-options .form-check:hover {
    background: var(--light);
}

.quiz-options .form-check-input {
    cursor: pointer;
}

.quiz-options .form-check-label {
    cursor: pointer;
}

/* Lesson TOC */
.lesson-toc {
    font-size: 0.9rem;
}

.toc-item {
    padding: 0.5rem 0;
    border-bottom: 1px solid var(--border);
}

.toc-item:last-child {
    border-bottom: none;
}

.toc-item a {
    color: var(--dark);
    transition: color 0.2s;
}

.toc-item a:hover {
    color: var(--primary);
}

.toc-item.active a {
    color: var(--primary);
    font-weight: 500;
}

/* Lesson navigation */
.lesson-nav .btn {
    min-width: 200px;
}

/* Progress bar */
.progress {
    border-radius: 0.5rem;
}

/* Footer */
.footer {
    margin-top: auto;
    border-top: 1px solid var(--border);
}

/* Responsive */
@media (max-width: 768px) {
    .lesson-nav .btn {
        min-width: 140px;
        font-size: 0.9rem;
    }
    
    .lesson-nav .btn .fa-arrow-left,
    .lesson-nav .btn .fa-arrow-right {
        display: none;
    }
    
    .course-card .card-img-top {
        height: 150px;
    }
}

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

.lesson-content {
    animation: fadeIn 0.3s ease-out;
}

/* SEO friendly */
h1, h2, h3, h4, h5, h6 {
    line-height: 1.3;
}

a {
    color: var(--primary);
}

a:hover {
    color: var(--primary-dark);
}