/* --- Homepage Stylesheet --- */

/* Hero Section */
.hero {
    min-height: 100vh;
    padding-top: calc(var(--nav-height) + 40px);
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
}

/* Subtle background grid pattern for tech atmosphere */
.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: 
        radial-gradient(circle at 10% 20%, rgba(0, 240, 255, 0.03) 0%, transparent 40%),
        radial-gradient(circle at 90% 80%, rgba(255, 184, 0, 0.02) 0%, transparent 40%),
        linear-gradient(rgba(255, 255, 255, 0.003) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.003) 1px, transparent 1px);
    background-size: 100% 100%, 100% 100%, 40px 40px, 40px 40px;
    z-index: 1;
}

.hero .container {
    position: relative;
    z-index: 2;
}

.hero-grid {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 60px;
    align-items: center;
}

@media (max-width: 992px) {
    .hero-grid {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 40px;
    }
}

.hero-tag {
    display: inline-block;
    padding: 6px 14px;
    background-color: rgba(0, 240, 255, 0.08);
    border: 1px solid var(--border-glow);
    color: var(--primary);
    border-radius: 100px;
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 24px;
    font-family: var(--font-heading);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.hero-title {
    margin-bottom: 20px;
}

.hero-title span {
    background: linear-gradient(90deg, var(--text-primary) 30%, var(--primary) 70%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    display: inline-block;
}

.hero-subtitle {
    font-size: 18px;
    color: var(--text-secondary);
    margin-bottom: 36px;
    max-width: 600px;
}

@media (max-width: 992px) {
    .hero-subtitle {
        margin-left: auto;
        margin-right: auto;
    }
}

.hero-actions {
    display: flex;
    gap: 16px;
}

@media (max-width: 992px) {
    .hero-actions {
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .hero-actions {
        flex-direction: column;
        gap: 12px;
    }
    
    .hero-actions .btn {
        width: 100%;
    }
}

/* Photo slot on homepage */
.hero-image-container {
    position: relative;
    width: 100%;
    max-width: 420px;
    aspect-ratio: 592 / 720;
    margin: 0 auto;
}

.hero-image-glow {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 110%;
    height: 110%;
    background: radial-gradient(circle, var(--primary-glow) 0%, transparent 60%);
    z-index: 1;
    pointer-events: none;
}

.hero-image-placeholder {
    position: relative;
    width: 100%;
    height: 100%;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    overflow: hidden;
    background: url('../assets/01.png') center center / cover no-repeat;
    z-index: 2;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
}

.hero-image-placeholder::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 120px;
    background: linear-gradient(to top, var(--bg-dark), transparent);
    z-index: 4;
}

.profile-outline {
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    align-items: center;
    padding-bottom: 40px;
    color: var(--text-muted);
}

/* --- Concept Preview Section --- */
.concept-preview-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    margin-top: 40px;
}

@media (max-width: 992px) {
    .concept-preview-grid {
        grid-template-columns: 1fr;
    }
}

.concept-card {
    cursor: pointer;
    text-align: left;
}

.concept-card .card-icon {
    width: 50px;
    height: 50px;
    border-radius: var(--radius-md);
    background-color: var(--border-color);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 24px;
    border: 1px solid var(--border-color);
    color: var(--primary);
    transition: var(--transition-smooth);
}

.concept-card:hover .card-icon {
    background-color: var(--primary);
    color: hsl(226, 45%, 5%);
    box-shadow: 0 0 15px var(--primary-glow);
}

.concept-card h3 {
    font-size: 20px;
    margin-bottom: 12px;
}

.concept-card p {
    font-size: 14px;
    margin-bottom: 20px;
    line-height: 1.5;
}

/* --- Latest Insights Section --- */
.insights-home-grid {
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
    gap: 40px;
    margin-top: 40px;
}

@media (max-width: 992px) {
    .insights-home-grid {
        grid-template-columns: 1fr;
    }
}

.featured-insight-card {
    display: flex;
    flex-direction: column;
    height: 100%;
}

.featured-image-placeholder {
    height: 240px;
    width: 100%;
    background: linear-gradient(135deg, hsl(226, 37%, 15%), hsl(226, 37%, 8%));
    border-radius: var(--radius-md);
    margin-bottom: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-muted);
    font-size: 14px;
    border: 1px solid var(--border-color);
}

.featured-insight-card .insight-meta {
    display: flex;
    gap: 16px;
    font-size: 13px;
    color: var(--primary);
    font-family: var(--font-heading);
    margin-bottom: 12px;
    font-weight: 500;
}

.featured-insight-card h3 {
    font-size: 24px;
    margin-bottom: 12px;
    line-height: 1.4;
}

.featured-insight-card p {
    font-size: 15px;
    margin-bottom: 24px;
}

.insight-list-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 0;
    border-bottom: 1px solid var(--border-color);
    transition: var(--transition-smooth);
}

.insight-list-item:first-child {
    padding-top: 0;
}

.insight-list-item:hover {
    border-color: var(--primary-glow);
}

.insight-list-content {
    max-width: 80%;
}

.insight-list-meta {
    font-size: 12px;
    color: var(--primary);
    font-family: var(--font-heading);
    margin-bottom: 6px;
}

.insight-list-item h4 {
    font-size: 17px;
    font-weight: 600;
    color: var(--text-primary);
    transition: var(--transition-smooth);
}

.insight-list-item:hover h4 {
    color: var(--primary);
}

.insight-list-arrow {
    color: var(--text-muted);
    font-size: 20px;
    transition: var(--transition-smooth);
}

.insight-list-item:hover .insight-list-arrow {
    color: var(--primary);
    transform: translateX(6px);
}

/* --- Courses and Certifications Carousel --- */
.courses-carousel {
    display: flex;
    gap: 24px;
    overflow-x: auto;
    padding: 20px 0 40px 0;
    margin-top: 30px;
    scrollbar-width: thin;
    scrollbar-color: var(--border-color) transparent;
}

.courses-carousel::-webkit-scrollbar {
    height: 6px;
}

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

.course-card-wrapper {
    flex: 0 0 350px;
}

.course-card-tag {
    font-size: 12px;
    color: var(--secondary);
    border: 1px solid var(--secondary-glow);
    padding: 4px 8px;
    border-radius: 4px;
    display: inline-block;
    margin-bottom: 12px;
    font-family: var(--font-heading);
    font-weight: 600;
}

.course-card-title {
    font-size: 18px;
    margin-bottom: 12px;
}

.course-card-details {
    list-style: none;
    margin-bottom: 24px;
}

.course-card-details li {
    font-size: 13px;
    color: var(--text-secondary);
    margin-bottom: 6px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.course-card-details li::before {
    content: '✓';
    color: var(--primary);
}

.course-card-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-top: 1px solid var(--border-color);
    padding-top: 16px;
    margin-top: auto;
}

.course-card-price {
    font-family: var(--font-heading);
    font-size: 18px;
    font-weight: 700;
    color: var(--text-primary);
}

/* --- Books Showcase Section --- */
.books-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 24px;
    margin-top: 40px;
}

@media (max-width: 992px) {
    .books-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 576px) {
    .books-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

.book-card {
    text-align: center;
}

.book-cover-container {
    width: 100%;
    aspect-ratio: 2/3;
    perspective: 1000px;
    margin-bottom: 16px;
}

.book-cover-placeholder {
    width: 100%;
    height: 100%;
    /**background: linear-gradient(135deg, hsl(226, 37%, 16%), hsl(226, 37%, 8%));
    border-left: 8px solid rgba(0, 0, 0, 0.4);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    border-right: 1px solid rgba(255, 255, 255, 0.05);
    border-bottom: 1px solid rgba(0, 0, 0, 0.5);
    box-shadow: 5px 5px 15px rgba(0, 0, 0, 0.4);
    border-radius: 2px 6px 6px 2px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding: 12px;
    text-align: center;
    color: var(--text-secondary);
    font-family: var(--font-heading);
    transition: transform 0.5s ease, box-shadow 0.5s ease;
    transform-style: preserve-3d;
    **/
}

.book-card:hover .book-cover-placeholder {
    transform: rotateY(-15deg) scale(1.05);
    box-shadow: 15px 15px 25px rgba(0, 0, 0, 0.6);
}

.book-cover-placeholder h4 {
    font-size: 13px;
    line-height: 1.3;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.book-cover-placeholder p {
    font-size: 10px;
    color: var(--text-muted);
}

/* Highlight the 6th book (newly released AICSO concept-focused book) */
.book-card.featured-book .book-cover-placeholder {
    background: linear-gradient(135deg, hsl(43, 100%, 20%), hsl(226, 45%, 6%));
    border-left: 8px solid var(--secondary);
    border-top: 1px solid rgba(255, 184, 0, 0.2);
}

.book-card.featured-book h4 {
    color: var(--secondary);
}

.book-title {
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 4px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.book-meta {
    font-size: 12px;
    color: var(--text-muted);
}

/* --- News and Events Timeline --- */
.news-timeline {
    position: relative;
    max-width: 800px;
    margin: 40px auto 0 auto;
}

.news-timeline::before {
    content: '';
    position: absolute;
    top: 0;
    left: 20px;
    width: 2px;
    height: 100%;
    background-color: var(--border-color);
}

.news-item {
    position: relative;
    padding-left: 60px;
    margin-bottom: 40px;
}

.news-item::before {
    content: '';
    position: absolute;
    top: 6px;
    left: 17px;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background-color: var(--bg-dark);
    border: 2px solid var(--primary);
    box-shadow: 0 0 0 4px var(--bg-dark);
    z-index: 2;
}

.news-date {
    font-family: var(--font-heading);
    font-size: 13px;
    color: var(--primary);
    font-weight: 600;
    margin-bottom: 4px;
}

.news-item h3 {
    font-size: 18px;
    margin-bottom: 8px;
}

.news-item p {
    font-size: 14px;
}

/* --- Community Entry --- */
.community-home-card {
    background: radial-gradient(circle at 100% 100%, rgba(0, 240, 255, 0.05) 0%, transparent 50%), var(--bg-surface-glass);
    border: 1px solid var(--border-color);
    padding: 60px;
    border-radius: var(--radius-lg);
    text-align: center;
    margin-top: 40px;
}

@media (max-width: 768px) {
    .community-home-card {
        padding: 40px 24px;
    }
}

.community-home-card h3 {
    margin-bottom: 16px;
}

.community-home-card p {
    max-width: 600px;
    margin: 0 auto 36px auto;
}

.community-actions {
    display: flex;
    justify-content: center;
    gap: 20px;
}

@media (max-width: 576px) {
    .community-actions {
        flex-direction: column;
        align-items: center;
        gap: 12px;
    }
    
    .community-actions .btn {
        width: 100%;
        max-width: 280px;
    }
}

/* --- Why Now Section --- */
.why-now-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    margin-top: 40px;
}

@media (max-width: 992px) {
    .why-now-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 576px) {
    .why-now-grid {
        grid-template-columns: 1fr;
    }
}

.why-now-card {
    padding: 32px 24px;
    background: var(--bg-surface-glass);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    text-align: left;
    transition: var(--transition-smooth);
}

.why-now-card:hover {
    border-color: var(--primary-glow);
    transform: translateY(-4px);
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.15);
}

.why-now-num {
    font-size: 40px;
    font-weight: 800;
    color: var(--primary);
    font-family: var(--font-heading);
    line-height: 1;
    margin-bottom: 16px;
}

.why-now-card h3 {
    font-size: 17px;
    margin-bottom: 10px;
}

.why-now-card p {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* --- Model Overview Section --- */
.model-overview-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    margin-top: 40px;
}

@media (max-width: 992px) {
    .model-overview-grid {
        grid-template-columns: 1fr;
    }
}

.model-card {
    background: var(--bg-surface-glass);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 36px 28px;
    text-align: center;
    transition: var(--transition-smooth);
}

.model-card:hover {
    border-color: var(--primary-glow);
    transform: translateY(-4px);
}

.model-card-number {
    font-size: 56px;
    font-weight: 800;
    color: var(--primary);
    font-family: var(--font-heading);
    line-height: 1;
    margin-bottom: 12px;
}

.model-card-unit {
    font-size: 16px;
    color: var(--text-secondary);
    font-weight: 600;
    margin-bottom: 16px;
}

.model-card h3 {
    font-size: 18px;
    margin-bottom: 12px;
}

.model-card p {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* --- Domains Section --- */
.domains-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
    margin-top: 40px;
}

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

.domain-card {
    background: var(--bg-surface-glass);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 32px 28px;
    transition: var(--transition-smooth);
}

.domain-card:hover {
    border-color: var(--primary-glow);
}

.domain-card-header {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 16px;
}

.domain-card-id {
    font-size: 14px;
    font-weight: 700;
    color: var(--primary);
    background: rgba(0, 182, 151, 0.1);
    padding: 6px 12px;
    border-radius: 6px;
    font-family: var(--font-heading);
    white-space: nowrap;
}

.domain-card h3 {
    font-size: 18px;
    margin: 0;
}

.domain-card p {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 16px;
}

.domain-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.domain-tag {
    font-size: 12px;
    color: var(--text-secondary);
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-color);
    padding: 4px 10px;
    border-radius: 100px;
    font-family: var(--font-heading);
}

/* --- Maturity Model Section --- */
.maturity-levels {
    display: flex;
    gap: 16px;
    margin-top: 40px;
    overflow-x: auto;
    padding-bottom: 10px;
}

@media (max-width: 992px) {
    .maturity-levels {
        flex-wrap: wrap;
    }
}

.maturity-level {
    flex: 1;
    min-width: 160px;
    background: var(--bg-surface-glass);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 24px 20px;
    text-align: center;
    transition: var(--transition-smooth);
}

.maturity-level:hover {
    border-color: var(--primary-glow);
    transform: translateY(-4px);
}

.maturity-level-id {
    font-size: 13px;
    font-weight: 700;
    color: var(--primary);
    background: rgba(0, 182, 151, 0.1);
    padding: 4px 10px;
    border-radius: 100px;
    display: inline-block;
    margin-bottom: 12px;
    font-family: var(--font-heading);
}

.maturity-level h3 {
    font-size: 17px;
    margin-bottom: 8px;
}

.maturity-level p {
    font-size: 13px;
    color: var(--text-secondary);
    line-height: 1.5;
}

/* --- Enterprise Practice Section --- */
.enterprise-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
    margin-top: 40px;
}

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

.enterprise-card {
    background: var(--bg-surface-glass);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 32px 28px;
}

.enterprise-card h3 {
    font-size: 18px;
    margin-bottom: 16px;
}

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

.enterprise-list li {
    font-size: 14px;
    color: var(--text-secondary);
    padding: 8px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    display: flex;
    align-items: center;
    gap: 10px;
}

.enterprise-list li:last-child {
    border-bottom: none;
}

.enterprise-list li::before {
    content: '';
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--primary);
    flex-shrink: 0;
}

/* --- Regulatory Section --- */
.regulatory-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 16px;
    margin-top: 40px;
}

@media (max-width: 992px) {
    .regulatory-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 576px) {
    .regulatory-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

.regulatory-item {
    background: var(--bg-surface-glass);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 24px 16px;
    text-align: center;
    transition: var(--transition-smooth);
}

.regulatory-item:hover {
    border-color: var(--primary-glow);
    transform: translateY(-2px);
}

.regulatory-item h4 {
    font-size: 14px;
    margin-bottom: 6px;
}

.regulatory-item p {
    font-size: 12px;
    color: var(--text-muted);
}

/* --- Case Studies Section --- */
.cases-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 20px;
    margin-top: 40px;
}

@media (max-width: 992px) {
    .cases-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 576px) {
    .cases-grid {
        grid-template-columns: 1fr;
    }
}

.case-card {
    background: var(--bg-surface-glass);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 28px 20px;
    text-align: center;
    transition: var(--transition-smooth);
}

.case-card:hover {
    border-color: var(--primary-glow);
    transform: translateY(-4px);
}

.case-icon {
    font-size: 36px;
    margin-bottom: 16px;
}

.case-card h3 {
    font-size: 16px;
    margin-bottom: 8px;
}

.case-card p {
    font-size: 13px;
    color: var(--text-secondary);
    line-height: 1.5;
}