/*
 * Corrected and restructured style.css file.
 * This version uses a mobile-first approach,
 * centralizes core styles, and corrects inconsistencies.
 */

/* --- Base & Global Styles --- */

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    background-color: #f4f7f6;
    color: #333;
    text-align: left; /* Left-align all text by default */
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

main {
    flex-grow: 1; //This keeps the footer at the bottom of the page when pages are small.
}

h1 {
    text-align: center;
}

#header-placeholder {
    min-height: 60px; /* Adjust as needed */
    transition: opacity 0.5s ease;
    opacity: 0;
    visibility: hidden;
}

#header-placeholder.loaded {
    visibility: visible;
    opacity: 1;
}

/* --- Footer Styling --- */

footer {
    background-color: #333;
    color: white;
    text-align: center;
    padding: 15px 0;
    margin-top: 30px;
    box-shadow: 0 -2px 5px rgba(0,0,0,0.2);
    font-size: 0.9em;
}

footer p {
    margin: 0;
}

/* --- General Content Styling --- */

.p1 {
    font-family: Helvetica, sans-serif;
}

.instruction-box {
    padding: 10px 25px 10px 10px;
    margin-bottom: 20px;
    background-color: #eff7ff;
    border: 1px solid #cceeff;
    border-radius: 8px;
    font-size: 1.05em;
    line-height: 1.5;
    color: #333;
    box-shadow: 0 2px 4px rgba(0,0,0,0.05);
    width: fit-content;
}

.instruction-box .icon {
    margin-right: 10px;
    margin-left: 6px;
    color: #00bbff;
    font-size: 1.2em;
    vertical-align: middle;
}

.page-content-wrapper {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.section {
    padding: 30px 20px 60px 20px;
    margin: 0 auto;
    max-width: 1200px;
}

.section h2 {
    margin-top: 20px;
    margin-bottom: 30px;
}

/* --- Navigation --- */

.navbar {
    background-color: #333;
    padding: 10px 0;
}

.navbar-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.navbar-logo img {
    height: 40px;
    width: auto;
    vertical-align: middle;
}

.hamburger-menu {
    display: block; /* Show on mobile by default */
    background: none;
    border: none;
    color: white;
    font-size: 2em;
    cursor: pointer;
    margin-right: auto;
}

.nav-list {
    list-style: none;
    margin: 0;
    padding: 0;
    display: none; /* Hide on mobile by default */
    flex-direction: column;
    position: absolute;
    top: 60px;
    right: 10px;
    background-color: #333;
    width: 200px;
    border-radius: 5px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.5);
    z-index: 999;
    align-items: flex-start;
}

.nav-list.active {
    display: flex; /* Show vertical nav when active */
}

.nav-item {
    width: 100%;
    margin: 0;
    position: relative;
}

.nav-link {
    color: white;
    text-decoration: none;
    padding: 10px 15px;
    display: block;
}

.nav-link:hover {
    background-color: #575757;
}

/* Dropdown Menu Styling */
.dropdown-menu {
    list-style: none;
    margin: 0;
    padding: 0;
    position: static; /* Position statically on mobile */
    background-color: #444;
    width: 100%;
    box-shadow: none;
    display: none; /* Hidden by default */
}

.nav-list.active .dropdown-menu {
    display: block; /* Show dropdown when mobile menu is active */
}

.dropdown-link {
    color: white;
    padding: 12px 16px;
    text-decoration: none;
    display: block;
    text-align: left;
}

.dropdown-link:hover {
    background-color: #666;
}

#language-switcher {
    margin-left: auto;
    display: flex;
    align-items: center;
    padding: 0 15px;
    margin-right: 10px;
}

.language-link {
    display: flex;
    align-items: center;
    text-decoration: none;
    color: white;
}

.language-flag {
    width: 24px;
    height: 18px;
    margin-right: 8px;
}

/* --- Hero Section --- */

.hero-section {
    background: linear-gradient(rgba(0, 0, 0, 0.5), rgba(0, 0, 0, 0.5)), url('images/breakfast.png');
    background-size: cover;
    background-position: center;
    color: white;
    text-align: center;
    padding: 100px 20px;
}

.hero-section h1 {
    font-size: 3.5em;
    margin-bottom: 10px;
}

.hero-section p {
    font-size: 1.2em;
    margin-bottom: 30px;
}

/* --- Buttons --- */

.button {
    display: inline-block;
    padding: 12px 25px;
    background-color: #007bff;
    color: white;
    text-decoration: none;
    border-radius: 5px;
    font-size: 1.1em;
    transition: background-color 0.3s ease;
}

.button:hover {
    background-color: #0056b3;
}

.primary-button {
    background-color: #28a745;
}

.primary-button:hover {
    background-color: #218838;
}

.secondary-button {
    background-color: #00a896;
    color: white;
}

.secondary-button:hover {
    background-color: #008f80;
}

.sample-lesson-buttons {
    display: flex;
    flex-direction: row;
    gap: 10px;
    margin-top: 20px;
}

/* --- About Us Section --- */

#about.section {
    padding-top: 60px;
}

.about-section-wrapper {
    background: linear-gradient(rgba(0, 0, 0, 0.6), rgba(0, 0, 0, 0.6)), url('images/people.jpg') no-repeat center center/cover;
    color: white;
    padding: 60px 30px;
    border-radius: 10px;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.08);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
}

.about-section-wrapper h3,
.about-section-wrapper ul {
    max-width: 600px;
    color: white;
    text-align: justify;
}

.benefits-grid {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 20px;
    margin-top: 30px;
}

.benefit-item {
    text-align: center;
    padding: 20px;
    border-radius: 8px;
    background-color: white;
    box-shadow: 0 4px 8px rgba(0,0,0,0.1);
    flex: 1 1 250px;
    max-width: 350px;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.benefit-item h4,
.benefit-item p {
    color: #333;
}

.benefit-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 6px 12px rgba(0,0,0,0.15);
}

.benefit-item i {
    font-size: 2.5em;
    color: #007bff;
    margin-bottom: 10px;
}

.benefit-item h4 {
    margin: 0 0 5px 0;
}

/* --- Courses Section --- */

.courses-container {
    position: relative;
    overflow: hidden;
    padding: 20px;
    max-width: 1000px;
    margin: 0 auto;
}

.courses-carousel {
    display: flex;
    transition: transform 0.5s ease-in-out;
    gap: 20px;
}

.carousel-button {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background-color: rgba(0, 0, 0, 0.5);
    color: white;
    border: none;
    cursor: pointer;
    padding: 10px;
    z-index: 10;
    font-size: 1.5em;
    border-radius: 50%;
    transition: opacity 0.3s ease;
}

.carousel-button.prev {
    left: 10px;
}

.carousel-button.next {
    right: 10px;
}

.carousel-button.disabled {
    opacity: 0.3;
    cursor: not-allowed;
}

.course-card {
    min-width: calc(33.33% - 13.33px);
    box-sizing: border-box;
    background-color: white;
    border-radius: 10px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    padding: 20px;
    text-align: center;
    transition: transform 0.3s ease;
}

.course-card p {
    text-align: justify;
}

.course-card:hover {
    transform: translateY(-5px);
}

.course-card img {
    max-width: 100%;
    height: 200px;
    object-fit: cover;
    border-radius: 8px;
    margin-bottom: 15px;
}

/* --- Teachers Section --- */

.teachers-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 30px;
    width: 100%;
    margin-top: 30px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.teacher-card {
    text-align: center;
    background: white;
    padding: 20px;
    border-radius: 10px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

.teacher-card img {
    width: 150px;
    height: 150px;
    border-radius: 50%;
    object-fit: cover;
    border: 3px solid #007bff;
}

.teacher-card ul {
    text-align: left;
}

/* --- Contact Section --- */

.contact-container {
    display: flex;
    flex-direction: column;
    gap: 40px;
    align-items: center;
    text-align: center;
}

.contact-info-wrapper {
    display: flex;
    flex-direction: column;
    text-align: left;
    background: white;
    padding: 30px;
    border-radius: 10px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

.contact-item {
    display: flex;
    flex-direction: row; /* Set to row for horizontal layout */
    align-items: center;
    gap: 15px; /* Adjust gap to your liking */
    margin-bottom: 20px;
}

.contact-item:last-child {
    margin-bottom: 0;
}

.contact-item img {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    object-fit: cover;
    transition: transform 0.3s ease;
}

.contact-item img:hover {
    transform: scale(1.1);
}

.contact-item p {
    margin: 0;
    font-size: 1.1em;
}

.contact-form {
    max-width: 600px;
    width: 100%;
    background: white;
    padding: 30px;
    border-radius: 10px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    display: flex;
    flex-direction: column;
    align-items: center;
    flex-grow: 1;
}

.contact-form input,
.contact-form textarea {
    width: 100%;
    padding: 10px;
    margin-bottom: 20px;
    border: 1px solid #ccc;
    border-radius: 5px;
    font-size: 1em;
}

.contact-form textarea {
    resize: vertical;
}

.contact-form button {
    width: auto;
    padding: 12px 25px;
    background-color: #007bff;
    color: white;
    border: none;
    border-radius: 5px;
    font-size: 1.1em;
    cursor: pointer;
}

.contact-form button:hover {
    background-color: #0056b3;
}

/* --- Sample Lesson Section --- */

.sample-lesson-section {
    display: flex;
    flex-direction: column;
    gap: 40px;
    align-items: center;
}

.book-viewer {
    position: relative;
    width: 100%;
    max-width: 750px;
    height: auto;
    box-shadow: 0 4px 8px rgba(0,0,0,0.1);
    border-radius: 10px;
    overflow: hidden;
    margin: 0 auto;
}

.book-carousel {
    display: flex;
    transition: transform 0.5s ease-in-out;
    /* gap: 20px; */
}

.book-page {
    min-width: 50%; /* Show 2 images at a time */
    box-sizing: border-box;
    padding: 5px;
}

.book-page img {
    width: 100%;
    height: auto;
    display: block;
    border-radius: 8px;
}


/* --- Media Queries --- */

/* Mobile (Max 768px) */
@media (max-width: 768px) {
    /* Navbar */
    .nav-list {
        right: auto; /* REMOVE the right constraint */
        left: 20px;  /* PIN the menu to the left side */
    }

    /* NEW MOBILE LAYOUT RULES */
    .navbar-content {
        justify-content: space-between; /* Use space-between for alignment */
    }

    .hamburger-menu {
        order: 1; /* Far Left */
        margin-left: 0; /* Remove existing margin-left */
        margin-right: auto; /* Push content away to the right */
    }

    #language-switcher {
        order: 2; /* Middle, next to KakaoTalk */
        margin-right: 10px; /* Space before KakaoTalk icon */
        margin-left: auto; /* Remove existing margin-left: auto; if it was meant to be on the far right */
        padding: 0; /* Remove padding if it's interfering */
    }

    .navbar-logo { /* KakaoTalk icon */
        order: 3; /* Far Right */
    }

    /* Courses Carousel */
    .course-card {
        min-width: 100%; /* Show one card at a time */
    }

    /* Contact Section */
    .contact-container {
        gap: 20px;
    }

    /* Hero Section */
    .hero-section .button {
        margin-bottom: 10px;
    }

}

/* Desktop (Min 769px) */
@media (min-width: 769px) {
    .hamburger-menu {
        display: none; /* Hide hamburger on desktop */
    }

    .navbar-logo-right {
        display: block;
    }

    .nav-list {
        display: flex; /* Show horizontal nav on desktop */
        flex-direction: row;
        position: static;
        width: auto;
        box-shadow: none;
    }

    .nav-item {
        width: auto;
        margin: 0 15px;
    }

    .dropdown-menu {
        position: absolute;
        top: 100%;
        left: 0;
        min-width: 160px;
        box-shadow: 0px 8px 16px 0px rgba(0,0,0,0.2);
        display: none; /* Hide on desktop by default */
    }

    .nav-item.dropdown:hover .dropdown-menu {
        display: block; /* Show dropdown on hover */
    }

    .navbar-content .nav-list {
        display: flex;
        justify-content: center;
        flex-grow: 1;
    }

    /* Contact Section */
    .contact-container {
        flex-direction: row;
        justify-content: center;
        align-items: stretch;
        gap: 20px;
    }

    .contact-info-wrapper {
        flex: 1;
        max-width: 350px;
        max-height: 282px; //A hack job to make the boxes the same height. Gemini couldn't do it.
        padding: 30px;
    }

    .contact-form {
        flex: 2;
        max-width: none;
        padding: 30px;
    }
}

/* Specific overrides to handle text alignment inconsistencies */
.hero-section, .hero-section h1, .hero-section p, .section h2 {
    text-align: center;
}
.benefit-item p {
    text-align: left;
}
.page-navigation .left-button-container {
    margin-right: auto;
}

/* --- Practice Page Specific Styles --- */

.movie-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 20px;
}

.movie-card {
    background-color: #fff;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 4px 8px rgba(0,0,0,0.1);
    transition: transform 0.3s ease;
}

.movie-card:hover {
    transform: translateY(-5px);
}

.movie-card img {
    width: 100%;
    height: 280px;
    display: block;
}

.movie-card .card-content {
    padding: 15px;
    text-align: left;
}

.movie-card h3 {
    margin-top: 0;
    font-size: 1.2em;
}

.movie-card p {
    font-size: 0.9em;
    color: #555;
    margin-bottom: 5px;
}

.how-to-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    text-align: center;
}

.how-to-card {
    background-color: #fff;
    padding: 20px;
    border-radius: 10px;
    box-shadow: 0 4px 8px rgba(0,0,0,0.1);
}

.how-to-card img {
    width: 80px;
    height: 80px;
    margin-bottom: 10px;
}

.how-to-card h3 {
    margin-top: 0;
}

/* --- NEW RULES FOR HOW-TO SECTION --- */

/* 1. Make icons large and light blue */
.how-to-card .feature-icon {
    font-size: 5rem; /* Large size for the icon */
    color: #00bbff; /* Light blue color, matching the instruction box icon */
    margin-bottom: 15px;
}

/* 2. Ensure paragraph text is left-aligned */
.how-to-card p {
    text-align: left;
}

/* The h3 headers inherit text-align: center from the parent .how-to-grid */
.how-to-card h3 {
    margin-top: 0;
}

/* Styles for FAQ page */

.faq-container {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    border-bottom: 1px solid #ddd;
    padding: 15px 0;
}

.faq-question {
    background: none;
    border: none;
    width: 100%;
    text-align: left;
    padding: 0;
    font-size: 1em;
    font-weight: bold;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.faq-question:hover {
    color: #007bff;
}

.faq-icon {
    font-size: 1.5em;
    font-weight: normal;
    transition: transform 0.3s ease;
}

.faq-question.active .faq-icon {
    transform: rotate(45deg);
}

.faq-answer {
    /* Indentation for the answer */
    /* padding-left: 20px; */
    margin-top: 10px;
    /* Transition for smooth show/hide effect */
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease-in-out;
}

.faq-answer ol {
    padding-left: 20px;
    list-style-type: decimal;
}


.faq-question strong {
    flex-grow: 1;
}

/* --- NEW TABLE STYLES FOR RECOMMENDATIONS SECTION OF PRACTICE PAGE--- */

/* Centering headings */
#more-recommendations-section h2,
#more-recommendations-section h3 {
    text-align: center;
}

/* Centering paragraph */
#more-recommendations-section p {
    /* text-align: center; */
    /* max-width: 800px; */
    margin: 0 auto 20px auto;
}

.recommendations-table {
    /* Centering and Demarcation */
    width: 100%;
    /* max-width: 800px; */
    margin: 30px auto; /* Center with vertical margin */
    border-collapse: collapse;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    background-color: white;

    /* Demarcation: horizontal line at the top */
    border-top: 5px solid #007bff;
    border-radius: 8px;
    overflow: hidden;
}

.recommendations-table th,
.recommendations-table td {
    /* Spacing between columns */
    padding: 12px 15px;
    border: 1px solid #ddd;
    text-align: left;
    vertical-align: top;
}

.recommendations-table th {
    background-color: #f8f8f8;
    font-weight: bold;
    color: #333;
    border-bottom: 2px solid #ccc;
}

.recommendations-table tbody tr:nth-child(even) {
    background-color: #f9f9f9; /* Subtle zebra striping */
}

.recommendations-table a {
    color: #007bff;
    text-decoration: none;
}

.recommendations-table a:hover {
    text-decoration: underline;
}