/* ============================================
   CENTRALIZED STYLESHEET
   All CSS consolidated from HTML files
   ============================================ */

/* --- CSS Variables --- */
:root {
    --teal-bg: #148f95; /* Header background color */
    --light-cream: #EDEBD7; /* Main content and body background color */
    --text-color: #ffffff; /* Navigation link color */
    --dark-text: #333333; /* Main content text color */
    --button-bg: #148f95; /* Button background color */
    --button-hover: #107c81; /* Button hover color */
    --text-font: 'Fustat', sans-serif; /* Fustat font family */
    --member-title: #148f95; /* Color for the capitalized names */
    --category-bg: #4A4A4A; /* Category sidebar background */
    --lesson-border: #148f95; /* Lesson card border */
    --lesson-active-bg: #148f95; /* Active lesson background */
    --editor-bg: #2d2d2d; /* Dark background for code editor */
    --editor-text: #cccccc; /* Light text for code editor */
    --editor-border: #444444; /* Dark border for editor */
    --code-bg: #282c34; /* Code block background */
}

/* --- Global Reset --- */
html, body {
    margin: 0;
    padding: 0;
    overflow-x: hidden;
    max-width: 100vw;
    box-sizing: border-box;
}

*, *::before, *::after {
    box-sizing: inherit;
}

body {
    font-family: var(--text-font);
    background-color: var(--light-cream);
    color: var(--dark-text);
}

img, video, iframe {
    max-width: 100%;
    height: auto;
}

/* --- Header Container (Shared across all pages) --- */
.main-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
    box-sizing: border-box;
    background-color: var(--teal-bg);
    padding: 25px 40px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.header-logo-link {
    text-decoration: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 20px;
}

.header-logo-circle {
    width: 65px;
    height: 65px;
    border-radius: 50%;
    background-color: var(--light-cream);
    display: flex;
    justify-content: center;
    align-items: center;
    box-shadow: 0 0 0 3px rgba(0, 0, 0, 0.1) inset;
    overflow: hidden;
    flex-shrink: 0;
}

.logo-image {
    max-width: 100%;
    max-height: 100%;
    object-fit: cover;
}

.header-title {
    color: var(--text-color);
    font-family: var(--text-font);
    font-weight: 800;
    font-size: 1.5em;
    margin: 0;
    white-space: nowrap;
    margin-right: auto;
    padding-left: 40px;
}

.header-nav {
    flex-shrink: 0;
}

.header-nav ul {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    gap: 80px;
}

.header-nav li a {
    color: var(--text-color);
    text-decoration: none;
    font-size: 1.5em;
    font-family: var(--text-font);
    font-weight: 800;
    padding: 10px 0;
    transition: color 0.2s;
}

.header-nav li a:hover {
    color: #ffd700;
}

/* --- Index/Default Page Styles --- */
.content-section {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    background-color: var(--light-cream);
    padding: 40px 60px;
    margin: 0;
    box-shadow: none;
    border-radius: 0;
    max-width: none;
    gap: 40px;
}

.text-column {
    flex: 1;
    max-width: 55%;
    color: var(--dark-text);
    line-height: 1.6;
    text-align: center;
}

.text-column p {
    margin-bottom: 20px;
    text-align: left;
    font-family: var(--text-font);
    font-size: 1.5em;
    font-weight: 600;
}

.image-column {
    flex: 1;
    max-width: 45%;
    display: flex;
    justify-content: flex-end;
    align-items: center;
}

.code-snippet-image {
    max-width: 100%;
    height: auto;
    border-radius: 8px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
}

.start-button {
    display: inline-block;
    margin-top: 150px;
    background-color: var(--button-bg);
    color: var(--text-color);
    text-decoration: none;
    font-family: var(--text-font);
    font-weight: 800;
    font-size: 1.5em;
    padding: 15px 30px;
    border-radius: 50px;
    transition: background-color 0.3s ease;
}

.start-button:hover {
    background-color: var(--button-hover);
}

/* --- Oktatóanyagok Page Styles --- */
.lesson-container {
    display: flex;
    padding: 40px 60px;
    gap: 40px;
}

.lesson-main {
    flex: 3;
}

.lesson-main h2 {
    font-size: 2.5em;
    font-weight: 800;
    font-family: var(--text-font);
    margin-bottom: 5px;
}

.lesson-main p {
    font-size: 1.1em;
    font-family: var(--text-font);
    margin-bottom: 40px;
}

.lesson-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.lesson-card {
    background-color: var(--light-cream);
    border: 2px solid var(--lesson-border);
    border-radius: 12px;
    cursor: pointer;
    text-align: center;
    font-size: 1.5em;
    font-weight: 800;
    font-family: var(--text-font);
    color: var(--lesson-border);
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    transition: all 0.2s ease;
    height: 100px;
    display: flex;
    justify-content: center;
    align-items: center;
    text-decoration: none;
    padding: 25px;
    box-sizing: border-box;
}

.lesson-card:hover {
    box-shadow: 0 6px 10px rgba(0, 0, 0, 0.15);
    transform: translateY(-2px);
}

.lesson-card.active {
    background-color: var(--lesson-active-bg);
    border-color: var(--lesson-active-bg);
    color: var(--text-color);
}

.lesson-card.hidden {
    display: none !important;
}

.lesson-sidebar {
    flex: 1;
}

.sidebar-card {
    background-color: var(--category-bg);
    border-radius: 12px;
    margin-top: 150px;
    padding: 20px 25px;
    color: var(--text-color);
}

.sidebar-card h3 {
    font-size: 1.5em;
    font-weight: 800;
    font-family: var(--text-font);
    margin: 0 0 15px 0;
    border-bottom: 2px solid rgba(255, 255, 255, 0.2);
    padding-bottom: 10px;
}

.category-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.category-item {
    cursor: pointer;
    padding: 10px 0;
    font-size: 1.2em;
    font-family: var(--text-font);
    position: relative;
    transition: color 0.2s;
    margin-left: 15px;
}

.category-item::before {
    content: '•';
    color: var(--lesson-border);
    font-size: 1.5em;
    position: absolute;
    left: -15px;
    top: 50%;
    transform: translateY(-50%);
}

.category-item:hover,
.category-item.active-filter {
    color: #ffd700;
}

/* --- Lesson Content Styles (for individual lesson pages) --- */
.lesson-content {
    max-width: 1000px;
    margin: 50px auto;
    padding: 0 20px;
}

.lesson-content {
    font-family: var(--text-font);
}

.lesson-content h1 {
    font-size: 2.8em;
    font-weight: 800;
    font-family: var(--text-font);
    color: var(--dark-text);
    margin-top: 0;
    margin-bottom: 30px;
    border-bottom: 4px solid var(--lesson-border);
    display: inline-block;
    padding-bottom: 10px;
}

.lesson-content h2 {
    font-size: 2.2em;
    font-weight: 800;
    font-family: var(--text-font);
    color: var(--lesson-border);
    border-bottom: 2px solid rgba(20, 143, 149, 0.2);
    padding-bottom: 10px;
    margin-top: 40px;
}

.lesson-content h3 {
    font-size: 1.6em;
    font-weight: 600;
    font-family: var(--text-font);
    margin-top: 30px;
}

.lesson-content p,
.lesson-content li {
    font-size: 1.1em;
    font-family: var(--text-font);
    line-height: 1.6;
    margin-bottom: 20px;
}

.lesson-content p code {
    background-color: #e0e0e0;
    padding: 2px 5px;
    border-radius: 4px;
    font-weight: 600;
    color: var(--dark-text);
}

.code-block-container {
    background-color: var(--code-bg);
    color: #ffffff;
    padding: 15px;
    border-radius: 8px;
    overflow-x: auto;
    font-family: monospace;
    font-size: 1em;
    margin: 20px 0;
    max-width: 100%;
}

.code-block-container pre code {
    white-space: pre;
}

.nav-link {
    display: inline-block;
    margin-top: 40px;
    margin-bottom: 20px;
    padding: 12px 25px;
    background-color: var(--teal-bg);
    color: var(--text-color);
    text-decoration: none;
    font-weight: 600;
    font-family: var(--text-font);
    border-radius: 8px;
    transition: background-color 0.2s;
}

.nav-link:hover {
    background-color: var(--button-hover);
}

/* --- Rólunk Page Styles --- */
.about-container {
    padding: 80px 100px;
    max-width: 1400px;
    margin: 0 auto;
}

.member-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 80px 150px;
}

.member-block {
    color: var(--dark-text);
    font-family: var(--text-font);
    text-align: left;
}

.member-block.centered {
    grid-column: 1 / -1;
    max-width: 700px;
    margin: 0 auto;
}

.member-title {
    font-size: 2.2em;
    font-weight: 800;
    color: var(--member-title);
    margin-top: 0;
    margin-bottom: 5px;
    text-transform: uppercase;
    display: inline-block;
    position: relative;
}

.member-title::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: -5px;
    width: 100%;
    height: 3px;
    background-color: var(--member-title);
}

.member-description {
    font-size: 1.2em;
    font-weight: 400;
    line-height: 1.5;
    margin-top: 20px;
    text-align: left;
}

/* --- Szerkesztő (Editor) Page Styles --- */
body {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

.editor-container {
    display: flex;
    flex-direction: column;
    flex-grow: 1;
    padding: 30px;
    gap: 20px;
    max-width: 1600px;
    margin: 0 auto;
    width: 100%;
    box-sizing: border-box;
}

.code-panel {
    display: flex;
    gap: 20px;
    min-height: 350px;
    flex-wrap: wrap;
}

.editor-box {
    flex: 1 1 45%;
    display: flex;
    flex-direction: column;
    background-color: var(--editor-bg);
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
}

.editor-header {
    background-color: var(--editor-border);
    color: var(--text-color);
    font-family: var(--text-font);
    font-weight: 600;
    padding: 10px 15px;
    font-size: 1.1em;
    border-bottom: 1px solid #666;
}

.code-editor {
    width: 100%;
    flex-grow: 1;
    padding: 15px;
    box-sizing: border-box;
    border: none;
    outline: none;
    resize: none;
    font-family: 'Consolas', 'Monaco', monospace;
    font-size: 1em;
    line-height: 1.5;
    background-color: var(--editor-bg);
    color: var(--editor-text);
}

.result-panel {
    flex-grow: 1;
    min-height: 500px;
    background-color: #ffffff;
    border: 2px solid var(--teal-bg);
    border-radius: 8px;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
    overflow: hidden;
}

.result-panel iframe {
    width: 100%;
    height: 100%;
    border: none;
    background-color: #ffffff;
}

/* --- Lesson Placeholder Page Styles --- */
.placeholder-page {
    padding: 50px;
    text-align: center;
}

.placeholder-page h1 {
    color: #148f95;
}

.placeholder-page a {
    color: #007bff;
    text-decoration: none;
    font-weight: bold;
}

.placeholder-page a:hover {
    text-decoration: underline;
}

/* --- Responsive Design --- */
@media (max-width: 1200px) {
    .main-header {
        padding: 25px 30px;
    }
    .header-nav ul {
        gap: 50px;
    }
    .content-section {
        padding: 40px 40px;
        gap: 30px;
    }
    .lesson-container {
        padding: 40px 40px;
        gap: 30px;
    }
    .about-container {
        padding: 60px;
    }
    .editor-container {
        padding: 24px;
    }
}

@media (max-width: 1024px) {
    .lesson-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .editor-container {
        padding: 20px;
    }
    .code-panel {
        flex-direction: column;
    }
    .editor-box {
        flex-basis: auto;
    }
}

@media (max-width: 992px) {
    .main-header {
        padding: 20px 24px;
    }
    .header-title {
        padding-left: 24px;
        font-size: 1.35em;
    }
    .header-nav ul {
        gap: 36px;
    }
    .header-nav li a {
        font-size: 1.35em;
    }
    .content-section {
        padding: 30px 24px;
        gap: 24px;
    }
    .text-column,
    .image-column {
        max-width: 100%;
    }
    .start-button {
        margin-top: 80px;
    }
    .lesson-container {
        padding: 30px 24px;
        gap: 24px;
    }
    .lesson-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .sidebar-card {
        margin-top: 60px;
    }
    .lesson-content {
        max-width: 100%;
        padding: 0 20px;
    }
    .lesson-content h1 {
        font-size: 2.4em;
    }
    .lesson-content h2 {
        font-size: 2em;
    }
    .about-container {
        padding: 50px 40px;
    }
    .member-grid {
        grid-template-columns: repeat(auto-fit, minmax(min(100%, 320px), 1fr));
        gap: 60px 80px;
    }
    .editor-container {
        padding: 20px;
    }
    .code-panel {
        gap: 16px;
    }
    .editor-box {
        flex: 1 1 100%;
        max-width: 100%;
    }
    .result-panel {
        min-height: 400px;
    }
}

@media (max-width: 768px) {
    .main-header {
        flex-wrap: wrap;
        flex-direction: column;
        align-items: flex-start;
        padding: 20px 20px;
    }
    .header-logo-link {
        flex-shrink: 0;
    }
    .header-title {
        white-space: normal;
        padding-left: 0;
        margin-top: 12px;
        margin-right: 0;
    }
    .header-nav {
        width: 100%;
        margin-top: 16px;
    }
    .header-nav ul {
        flex-wrap: wrap;
        gap: 12px 24px;
    }
    .content-section {
        flex-wrap: wrap;
        padding: 24px 20px;
        gap: 24px;
    }
    .text-column {
        max-width: 100%;
    }
    .image-column {
        max-width: 100%;
        justify-content: center;
    }
    .code-snippet-image {
        max-width: 100%;
    }
    .start-button {
        margin-top: 40px;
    }
    .lesson-container {
        flex-direction: column;
        padding: 24px 20px;
        gap: 24px;
    }
    .lesson-grid {
        grid-template-columns: 1fr;
        gap: 16px;
    }
    .lesson-card {
        padding: 20px;
        font-size: 1.35em;
        height: auto;
        min-height: 80px;
    }
    .sidebar-card {
        margin-top: 40px;
    }
    .lesson-content {
        margin: 30px auto;
        padding: 0 16px;
    }
    .lesson-content h1 {
        font-size: 2em;
    }
    .lesson-content h2 {
        font-size: 1.75em;
    }
    .about-container {
        padding: 30px;
    }
    .member-grid {
        grid-template-columns: 1fr;
        gap: 50px;
    }
    .member-block.centered {
        grid-column: auto;
        max-width: 100%;
        margin: 0 auto;
    }
    .editor-container {
        padding: 16px;
        gap: 16px;
    }
    .code-panel {
        min-height: 280px;
    }
    .result-panel {
        min-height: 320px;
    }
    body {
        padding: 30px 20px;
    }
}

@media (max-width: 480px) {
    .main-header {
        padding: 16px 16px;
    }
    .header-logo-circle {
        width: 52px;
        height: 52px;
    }
    .header-title {
        font-size: 1.15em;
    }
    .header-nav ul {
        gap: 10px 16px;
    }
    .header-nav li a {
        font-size: 1.15em;
    }
    .content-section {
        padding: 20px 16px;
        gap: 20px;
    }
    .text-column p {
        font-size: 1.25em;
    }
    .start-button {
        margin-top: 24px;
        padding: 12px 24px;
        font-size: 1.25em;
    }
    .lesson-container {
        padding: 20px 16px;
        gap: 20px;
    }
    .lesson-main h2 {
        font-size: 2em;
    }
    .lesson-card {
        padding: 16px;
        font-size: 1.2em;
        min-height: 72px;
    }
    .sidebar-card {
        margin-top: 24px;
        padding: 16px 20px;
    }
    .lesson-content {
        margin: 24px auto;
        padding: 0 12px;
    }
    .lesson-content h1 {
        font-size: 1.75em;
    }
    .lesson-content h2 {
        font-size: 1.5em;
    }
    .lesson-content h3 {
        font-size: 1.35em;
    }
    .nav-link {
        padding: 10px 20px;
    }
    .about-container {
        padding: 24px 16px;
    }
    .member-grid {
        gap: 40px;
    }
    .member-title {
        font-size: 1.8em;
    }
    .member-description {
        font-size: 1.1em;
    }
    .editor-container {
        padding: 16px;
        gap: 16px;
    }
    .code-panel {
        min-height: 280px;
    }
    .result-panel {
        min-height: 320px;
    }
    .editor-header,
    .code-editor {
        padding: 10px 12px;
        font-size: 0.95em;
    }
    body {
        padding: 20px 16px;
    }
}