/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
}

/* Section Headers */
.section-header {
    margin-bottom: 40px;
}

.section-header h2 {
    font-size: 32px;
    font-weight: 600;
    color: #323232;
    line-height: 1.3;
    margin-bottom: 16px;
}

.section-header h3 {
    font-size: 24px;
    font-weight: 600;
    color: #323232;
    line-height: 1.4;
    margin-bottom: 12px;
}

.section-header p {
    font-size: 16px;
    color: #323232;
    font-weight: 400;
    line-height: 1.7;
}

/* Grammar Cards Container */
.cards-container {
    display: flex;
    flex-wrap: wrap;
    gap: 24px;
}

@media (max-width: 640px) {
    .cards-container {
        gap: 24px;
    }
}

/* Grammar Cards */
.grammar-card {
    background: white;
    border-radius: 10px;
    padding: 24px;
    transition: all 0.3s ease;
    border: 1px solid rgba(217, 217, 219, .6392156863);
    width: 25%;
    max-width: 380px;
    display: flex;
    flex-direction: column;
    cursor: pointer;
}

@media (max-width: 1024px) {
    .grammar-card {
        width: calc(50% - 12px);
    }
}

@media (max-width: 640px) {
    .grammar-card {
        width: 100%;
        padding: 18px;
    }
}

.grammar-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
}

.grammar-card .level-badge {
    display: inline-block;
    color: white;
    padding: 5px 12px;
    border-radius: 18px;
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.8px;
    margin-bottom: 14px;
    width: fit-content;
}

.grammar-card .level-badge.beginner {
    background: #319d5e;
}

.grammar-card .level-badge.intermediate {
    background: #006574;
}

.grammar-card .level-badge.advanced {
    background: #dc2626;
}

.grammar-card h4 {
    color: #323232;
    font-size: 20px;
    margin-bottom: 12px;
    font-weight: 600;
    line-height: 1.4;
}

@media (max-width: 640px) {
    .grammar-card h4 {
        font-size: 18px;
    }
}

.grammar-card p {
    color: #4a5568;
    font-size: 14px;
    line-height: 1.65;
    margin-bottom: 18px;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
    height: 64px;
}

.grammar-card .link {
    display: inline-flex;
    align-items: center;
    color: #323232;
    font-size: 13px;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.2s ease;
    width: fit-content;
}

.grammar-card .link .arrow {
    margin-left: 6px;
    transition: transform 0.2s ease;
    display: inline-block;
}

.grammar-card:hover .link {
    color: #e7b614;
}

.grammar-card:hover .link .arrow {
    transform: translateX(5px);
}

/* Book Cards Grid */
.book-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 30px;
    margin-top: 30px;
}

@media (max-width: 768px) {
    .book-grid {
        grid-template-columns: 1fr;
        gap: 24px;
    }
}

/* Book Cards - Vertical Layout */
.book-card {
    background: white;
    border-radius: 10px;
    padding: 24px;
    transition: all 0.3s ease;
    border: 1px solid rgba(217, 217, 219, .6392156863);
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
}

.book-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
}

.book-card .book-cover-wrapper {
    margin-bottom: 20px;
    width: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 200px;
}

.book-card img {
    max-width: 150px;
    height: auto;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    border-radius: 4px;
}

.book-card h3 {
    color: #323232;
    font-size: 20px;
    margin-bottom: 8px;
    font-weight: 600;
    line-height: 1.4;
}

.book-card .book-author {
    color: #6b7280;
    font-size: 14px;
    margin-bottom: 14px;
    font-style: italic;
    font-weight: 400;
}

.book-card p {
    color: #4a5568;
    font-size: 14px;
    line-height: 1.65;
    margin-bottom: 18px;
    flex-grow: 1;
}

.book-card .book-link {
    display: inline-flex;
    align-items: center;
    color: #323232;
    font-size: 13px;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.2s ease;
    padding: 8px 16px;
    border: 1px solid #e5e7eb;
    border-radius: 6px;
    margin-top: auto;
}

.book-card .book-link:hover {
    background: #f9fafb;
    border-color: #323232;
}

.book-card .book-link .arrow {
    margin-left: 6px;
    transition: transform 0.2s ease;
}

.book-card:hover .book-link .arrow {
    transform: translateX(3px);
}

/* Reading Cards - Horizontal Layout */
.reading-cards {
    display: grid;
    gap: 30px;
    margin-top: 30px;
}

@media (max-width: 968px) {
    .reading-cards {
        grid-template-columns: 1fr;
    }
}

.reading-card {
    background: white;
    border-radius: 10px;
    padding: 28px;
    transition: all 0.3s ease;
    border: 1px solid rgba(217, 217, 219, .6392156863);
    display: flex;
    gap: 24px;
}

@media (max-width: 640px) {
    .reading-card {
        flex-direction: column;
        padding: 20px;
    }
}

.reading-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
}

.reading-card-image {
    flex-shrink: 0;
    width: 160px;
    display: flex;
    align-items: flex-start;
    justify-content: center;
}

@media (max-width: 640px) {
    .reading-card-image {
        width: 100%;
        margin-bottom: 16px;
    }
}

.reading-card-image img {
    max-width: 140px;
    height: auto;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    border-radius: 4px;
}

.reading-card-content {
    flex: 1;
    display: flex;
    flex-direction: column;
}

.reading-card-content h3 {
    color: #323232;
    font-size: 22px;
    margin-bottom: 6px;
    font-weight: 600;
    line-height: 1.4;
}

@media (max-width: 640px) {
    .reading-card-content h3 {
        font-size: 20px;
    }
}

.reading-card-content h3 a {
    color: #323232;
    text-decoration: none;
    transition: color 0.2s ease;
}

.reading-card-content h3 a:hover {
    color: #e7b614;
}

.reading-level {
    color: #6b7280;
    font-size: 14px;
    margin-bottom: 14px;
    font-style: italic;
    font-weight: 400;
}

.reading-card-content p {
    color: #323232;
    font-size: 14px;
    line-height: 1.7;
    margin-bottom: 12px;
}

.reading-card .book-link {
    display: inline-flex;
    align-items: center;
    color: #323232;
    font-size: 13px;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.2s ease;
    padding: 8px 16px;
    border: 1px solid #e5e7eb;
    border-radius: 6px;
    width: fit-content;
    margin-top: 8px;
}

.reading-card .book-link:hover {
    background: #f9fafb;
    border-color: #323232;
}

.reading-card .book-link.secondary {
    background: transparent;
    margin-left: 10px;
}

.reading-card .book-link .arrow {
    margin-left: 6px;
    transition: transform 0.2s ease;
}

.reading-card:hover .book-link .arrow {
    transform: translateX(3px);
}

.book-links {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 8px;
}

@media (max-width: 640px) {
    .book-links {
        flex-direction: column;
    }

    .reading-card .book-link.secondary {
        margin-left: 0;
    }
}

/* Suffix Grid */
.suffix-grid {
    margin: 30px 0;
}

.suffix-grid h3 {
    color: #323232;
    font-size: 20px;
    font-weight: 600;
    margin-top: 24px;
    margin-bottom: 12px;
    line-height: 1.4;
}

.suffix-grid ul {
    list-style: none;
    padding: 0;
}

.suffix-grid li {
    color: #323232;
    font-size: 15px;
    font-weight: 400;
    line-height: 1.8;
    margin-bottom: 10px;
    padding-left: 20px;
    position: relative;
}

.suffix-grid li:before {
    content: "→";
    position: absolute;
    left: 0;
    color: #6b7280;
}

.suffix-note {
    background: #f9fafb;
    border-left: 3px solid #323232;
    padding: 16px 20px;
    margin: 24px 0;
    border-radius: 4px;
}

.suffix-note p {
    color: #323232;
    font-size: 14px;
    font-weight: 400;
    line-height: 1.65;
    margin: 0;
}

/* Section Spacing */
.section {
    margin-bottom: 60px;
}

/* FAQ Accordion */
.faq-accordion {
    margin: 40px 0;
}

.faq-accordion .accordion-item {
    border-bottom: 1px solid rgba(217, 217, 219, .6392156863);
}

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

.faq-accordion button {
    position: relative;
    display: block;
    text-align: left;
    width: 100%;
    padding: 1.2em 3em 1.2em 0;
    color: #323232;
    font-size: 20px;
    font-weight: 600;
    border: none;
    background: none;
    outline: none;
    cursor: pointer;
    transition: color 0.3s ease;
    line-height: 1.4;
}

@media (max-width: 640px) {
    .faq-accordion button {
        font-size: 18px;
        padding: 1em 3em 1em 0;
    }
}

.faq-accordion button:hover,
.faq-accordion button:focus {
    color: #e7b614;
}

.faq-accordion button:hover .icon,
.faq-accordion button:focus .icon {
    border-color: #e7b614;
}

.faq-accordion button[aria-expanded='true'] {
    color: #e7b614;
    border-bottom: 2px solid #e7b614;
}

.faq-accordion .icon {
    display: inline-block;
    position: absolute;
    top: 22px;
    right: 0;
    width: 26px;
    height: 26px;
    border: 2px solid #323232;
    border-radius: 50%;
    transition: all 0.3s ease;
}

@media (max-width: 640px) {
    .faq-accordion .icon {
        top: 18px;
    }
}

.faq-accordion .icon::before {
    display: block;
    position: absolute;
    content: '';
    top: 11px;
    left: 6px;
    width: 12px;
    height: 2px;
    background: #323232;
    transition: all 0.3s ease;
}

.faq-accordion .icon::after {
    display: block;
    position: absolute;
    content: '';
    top: 6px;
    left: 11px;
    width: 2px;
    height: 12px;
    background: #323232;
    transition: all 0.3s ease;
}

.faq-accordion button:hover .icon::before,
.faq-accordion button:hover .icon::after {
    background: #e7b614;
}

.faq-accordion button[aria-expanded='true'] .icon {
    border-color: #e7b614;
}

.faq-accordion button[aria-expanded='true'] .icon::before {
    background: #e7b614;
}

.faq-accordion button[aria-expanded='true'] .icon::after {
    opacity: 0;
    transform: rotate(90deg);
}

.faq-accordion .accordion-content {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease;
}

.faq-accordion button[aria-expanded='true'] + .accordion-content {
    max-height: 1000px;
    transition: max-height 0.6s ease;
}

.faq-accordion .accordion-content p,
.faq-accordion .accordion-content ol {
    color: #323232;
    font-size: 15px;
    font-weight: 400;
    line-height: 1.7;
    margin: 1.5em 0;
    padding-right: 1em;
}

.faq-accordion .accordion-content ol {
    padding-left: 24px;
}

.faq-accordion .accordion-content li {
    margin-bottom: 8px;
}

.faq-accordion .accordion-content p:first-child {
    margin-top: 0.5em;
}

.faq-accordion .accordion-content p:last-child {
    margin-bottom: 1.5em;
}