/* ============================================
   STEM KITS PAGE STYLES
   HierroShield Dark Cyber Theme
   ============================================ */

/* ===== HERO SECTION ===== */
.stem-hero {
    min-height: 80vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
    background: linear-gradient(135deg, #0a0a0f 0%, #1a1a2e 50%, #0f0f1a 100%);
    padding-top: 100px;
}

.stem-hero::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(77, 208, 225, 0.05) 0%, transparent 70%);
    animation: rotate 20s linear infinite;
}

.stem-hero::after {
    content: '';
    position: absolute;
    bottom: -50%;
    right: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(149, 117, 205, 0.05) 0%, transparent 70%);
    animation: rotate 25s linear infinite reverse;
}

@keyframes rotate {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

.stem-hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    max-width: 1000px;
    margin: 0 auto;
    padding: 0 var(--spacing-xl);
}

.stem-hero-title {
    font-size: var(--font-size-5xl);
    font-weight: var(--font-weight-bold);
    margin-bottom: var(--spacing-lg);
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: fadeInUp 0.8s ease-out;
}

.stem-hero-subtitle {
    font-size: var(--font-size-2xl);
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
    font-weight: var(--font-weight-semibold);
    animation: fadeInUp 1s ease-out;
}

.stem-hero-tagline {
    font-size: var(--font-size-lg);
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xl);
    animation: fadeInUp 1.2s ease-out;
}

.domains-line {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    justify-content: center;
    align-items: center;
    margin-bottom: var(--spacing-xl);
    animation: fadeInUp 1.4s ease-out;
}

.domain-item {
    color: var(--neon-cyan);
    font-weight: var(--font-weight-medium);
    font-size: var(--font-size-base);
    padding: var(--spacing-xs) var(--spacing-md);
    background: rgba(77, 208, 225, 0.08);
    border: 1px solid rgba(77, 208, 225, 0.15);
    border-radius: var(--radius-full);
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.domain-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(77, 208, 225, 0.12), transparent);
    transition: left 0.5s;
}

.domain-item:hover::before {
    left: 100%;
}

.domain-item:hover {
    transform: translateY(-3px) scale(1.05);
    border-color: var(--neon-cyan);
    box-shadow: 0 5px 20px rgba(77, 208, 225, 0.25);
    background: rgba(77, 208, 225, 0.12);
}

.domain-separator {
    color: var(--text-muted);
    margin: 0 var(--spacing-xs);
    font-size: var(--font-size-lg);
}

.contact-strip {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    animation: fadeInUp 1.6s ease-out;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.contact-separator {
    color: var(--text-muted);
}

/* ===== ABOUT STEM SECTION ===== */
.about-stem {
    padding: var(--spacing-3xl) 0;
    background: var(--bg-primary);
}

.about-stem-content {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: var(--spacing-2xl);
    align-items: center;
}

.about-stem-text {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.about-stem-intro {
    font-size: var(--font-size-lg);
    color: var(--text-secondary);
    line-height: 1.7;
}

.specializations {
    margin-top: var(--spacing-lg);
}

.specializations-title {
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-bold);
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
}

.specialization-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.specialization-tag {
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-full);
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    transition: all var(--transition-base);
}

.specialization-tag:hover {
    border-color: var(--neon-cyan);
    color: var(--neon-cyan);
    background: rgba(77, 208, 225, 0.08);
    transform: translateY(-2px);
}

.about-stem-visual {
    position: relative;
}

.about-stem-image-placeholder {
    width: 100%;
    height: 350px;
    position: relative;
    border-radius: var(--radius-xl);
    overflow: hidden;
    background: linear-gradient(135deg, rgba(77, 208, 225, 0.03) 0%, rgba(149, 117, 205, 0.03) 100%);
    border: 1px solid var(--glass-border);
}

.about-stem-image-placeholder .image-content {
    position: relative;
    z-index: 2;
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-xl);
    gap: var(--spacing-md);
}

.about-stem-image-placeholder .image-icon {
    width: 120px;
    height: 120px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(77, 208, 225, 0.08);
    border: 2px solid rgba(77, 208, 225, 0.15);
    border-radius: var(--radius-lg);
    color: var(--neon-cyan);
    transition: all var(--transition-base);
}

.about-stem-image-placeholder:hover .image-icon {
    transform: scale(1.1);
    background: rgba(77, 208, 225, 0.12);
    border-color: rgba(77, 208, 225, 0.3);
    box-shadow: 0 8px 30px rgba(77, 208, 225, 0.15);
}

.about-stem-image-placeholder .image-label {
    color: var(--text-primary);
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-semibold);
    text-align: center;
}

.about-stem-image-placeholder .image-subtitle {
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
    text-align: center;
    margin-top: var(--spacing-xs);
}

/* ===== SECTION HEADERS ===== */
.section-header {
    text-align: center;
    margin-bottom: var(--spacing-2xl);
}

.section-title {
    font-size: var(--font-size-4xl);
    font-weight: var(--font-weight-bold);
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-intro {
    font-size: var(--font-size-base);
    color: var(--text-secondary);
    line-height: 1.7;
    max-width: 800px;
    margin: 0 auto;
}

.section-intro-secondary {
    font-size: var(--font-size-base);
    color: var(--text-secondary);
    line-height: 1.8;
    max-width: 800px;
    margin: var(--spacing-md) auto 0;
}

/* ===== WHY CHOOSE SECTION ===== */
.why-choose {
    padding: var(--spacing-5xl) 0;
    background: var(--bg-secondary);
}

.why-choose-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-4xl);
    align-items: center;
}

.why-choose-text {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xl);
}

.features-checklist {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.checklist-item {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-md);
    padding: var(--spacing-lg);
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.checklist-item::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 4px;
    background: var(--gradient-primary);
    transform: scaleY(0);
    transform-origin: bottom;
    transition: transform 0.3s ease-out;
}

.checklist-item:hover::before {
    transform: scaleY(1);
}

.checklist-item:hover {
    transform: translateX(15px) scale(1.02);
    border-color: var(--neon-green);
    box-shadow: 0 10px 40px rgba(102, 187, 106, 0.2), 0 0 20px rgba(102, 187, 106, 0.15);
    background: rgba(102, 187, 106, 0.04);
}

.checklist-item:nth-child(1) { transition-delay: 0s; }
.checklist-item:nth-child(2) { transition-delay: 0.1s; }
.checklist-item:nth-child(3) { transition-delay: 0.2s; }
.checklist-item:nth-child(4) { transition-delay: 0.3s; }
.checklist-item:nth-child(5) { transition-delay: 0.4s; }

.check-icon {
    color: var(--neon-green);
    font-size: var(--font-size-xl);
    flex-shrink: 0;
    font-weight: var(--font-weight-bold);
}

.check-text {
    color: var(--text-secondary);
    line-height: 1.5;
    font-size: var(--font-size-sm);
}

.why-choose-visual {
    position: relative;
    height: 100%;
    min-height: 400px;
}

.visual-placeholder {
    width: 100%;
    height: 100%;
    min-height: 400px;
    position: relative;
    border-radius: var(--radius-xl);
    overflow: hidden;
    display: block;
    background: var(--bg-tertiary);
    border: 1px solid var(--glass-border);
    transition: all var(--transition-base);
}

.visual-placeholder img {
    width: 100%;
    height: 100%;
    max-width: 100%;
    max-height: 100%;
    object-fit: fill;
    object-position: center;
    display: block;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    border-radius: var(--radius-xl);
    transition: opacity var(--transition-base);
}

.why-choose:hover .visual-placeholder {
    border-color: var(--neon-cyan);
    box-shadow: 0 0 30px rgba(77, 208, 225, 0.2);
}

.image-background-pattern {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: 
        repeating-linear-gradient(0deg, transparent, transparent 20px, rgba(77, 208, 225, 0.015) 20px, rgba(77, 208, 225, 0.015) 22px),
        repeating-linear-gradient(90deg, transparent, transparent 20px, rgba(77, 208, 225, 0.015) 20px, rgba(77, 208, 225, 0.015) 22px);
    opacity: 0.5;
    animation: gridMove 30s linear infinite;
}

.visual-content {
    position: relative;
    z-index: 2;
    text-align: center;
    color: var(--text-primary);
}

.visual-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--spacing-md);
}

.visual-icon svg {
    width: 100px;
    height: 100px;
    color: var(--text-muted);
    opacity: 0.4;
    transition: all var(--transition-base);
}

.why-choose:hover .visual-icon svg {
    color: var(--neon-cyan);
    opacity: 0.8;
    transform: scale(1.1);
}

.visual-label {
    font-size: var(--font-size-lg);
    color: var(--text-secondary);
    font-weight: var(--font-weight-medium);
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* ===== EDUCATION LEVELS SECTION ===== */
.education-levels {
    padding: var(--spacing-5xl) 0;
    background: var(--bg-primary);
}

.level-section {
    padding: var(--spacing-5xl) 0;
    position: relative;
}

.level-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 20% 50%, rgba(77, 208, 225, 0.03) 0%, transparent 50%),
        radial-gradient(circle at 80% 50%, rgba(149, 117, 205, 0.03) 0%, transparent 50%);
    pointer-events: none;
    opacity: 0;
    transition: opacity 0.5s ease-out;
}

.level-section:hover::before {
    opacity: 1;
}

.level-section.alt-bg {
    background: var(--bg-secondary);
}

.level-section.alt-bg::before {
    background: 
        radial-gradient(circle at 20% 50%, rgba(77, 208, 199, 0.03) 0%, transparent 50%),
        radial-gradient(circle at 80% 50%, rgba(102, 187, 106, 0.03) 0%, transparent 50%);
}

.level-header {
    margin-bottom: var(--spacing-xl);
    position: relative;
    padding-bottom: var(--spacing-md);
}

.level-header-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-3xl);
    align-items: center;
    margin-bottom: var(--spacing-2xl);
}

.level-header-content.reverse {
    grid-template-columns: 1fr 1fr;
}

.level-header-content.reverse .level-header-image {
    order: -1;
}

.level-header-text {
    text-align: left;
}

.level-header-image {
    position: relative;
}

.level-image-placeholder {
    width: 100%;
    min-height: 300px;
    position: relative;
    border-radius: var(--radius-xl);
    overflow: hidden;
    background: linear-gradient(135deg, rgba(26, 26, 46, 0.6) 0%, rgba(15, 15, 26, 0.8) 100%);
    border: 1px solid var(--glass-border);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-base);
}

.level-image-placeholder:hover {
    border-color: var(--neon-cyan);
    box-shadow: 0 20px 60px rgba(77, 208, 225, 0.2), var(--glow-cyan);
}

.level-image-placeholder .image-content {
    position: relative;
    z-index: 2;
    text-align: center;
}

.level-image-placeholder .image-icon {
    width: 100px;
    height: 100px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--spacing-md);
    background: rgba(77, 208, 225, 0.1);
    border: 2px solid rgba(77, 208, 225, 0.2);
    border-radius: var(--radius-lg);
    color: var(--neon-cyan);
    transition: all var(--transition-base);
}

.level-image-placeholder:hover .image-icon {
    background: rgba(77, 208, 225, 0.15);
    border-color: var(--neon-cyan);
    transform: scale(1.1);
    box-shadow: 0 8px 30px rgba(77, 208, 225, 0.2);
}

.level-image-placeholder .image-icon svg {
    width: 60px;
    height: 60px;
}

.level-image-placeholder .image-label {
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    text-transform: uppercase;
    letter-spacing: 2px;
}

.level-benefits {
    list-style: none;
    padding: 0;
    margin-top: var(--spacing-lg);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.level-benefits li {
    color: var(--text-secondary);
    font-size: var(--font-size-base);
    line-height: 1.6;
    padding-left: var(--spacing-xl);
    position: relative;
}

.level-benefits li::before {
    content: '▸';
    position: absolute;
    left: 0;
    color: var(--neon-cyan);
    font-weight: var(--font-weight-bold);
}

.level-header::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 100px;
    height: 3px;
    background: var(--gradient-primary);
    border-radius: var(--radius-full);
}

.level-title {
    font-size: var(--font-size-4xl);
    font-weight: var(--font-weight-bold);
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.level-focus {
    font-size: var(--font-size-lg);
    color: var(--text-secondary);
    margin-bottom: var(--spacing-sm);
}

.focus-highlight {
    color: var(--neon-cyan);
    font-weight: var(--font-weight-semibold);
}

.level-description {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    max-width: 800px;
    margin: 0 auto;
    line-height: 1.6;
}

.kit-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-lg);
}

.kit-card {
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    padding: 0;
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
    cursor: pointer;
    display: flex;
    flex-direction: column;
}

.kit-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(77, 208, 225, 0.1), transparent);
    transition: left 0.6s ease-out;
    z-index: 1;
}

.kit-card::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient-primary);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.4s ease-out;
    z-index: 2;
}

.kit-card:hover::before {
    left: 100%;
}

.kit-card:hover::after {
    transform: scaleX(1);
}

.kit-card:hover {
    transform: translateY(-15px) scale(1.02);
    border-color: var(--neon-cyan);
    box-shadow: 0 20px 60px rgba(77, 208, 225, 0.2), var(--glow-cyan);
    background: rgba(26, 26, 46, 0.6);
}

.kit-card:nth-child(1):hover {
    border-color: var(--neon-cyan);
    box-shadow: 0 20px 60px rgba(77, 208, 225, 0.2), var(--glow-cyan);
}

.kit-card:nth-child(2):hover {
    border-color: var(--neon-teal);
    box-shadow: 0 20px 60px rgba(77, 208, 199, 0.2), var(--glow-teal);
}

.kit-card:nth-child(3):hover {
    border-color: var(--neon-violet);
    box-shadow: 0 20px 60px rgba(149, 117, 205, 0.2), var(--glow-violet);
}

.kit-card:nth-child(4):hover {
    border-color: var(--neon-green);
    box-shadow: 0 20px 60px rgba(102, 187, 106, 0.2), var(--glow-green);
}

.kit-image-placeholder {
    width: 100%;
    height: 180px;
    min-height: 180px;
    position: relative;
    background: linear-gradient(135deg, rgba(26, 26, 46, 0.8) 0%, rgba(15, 15, 26, 0.9) 100%);
    border-bottom: 1px solid var(--glass-border);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.kit-image-placeholder .image-background-pattern {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: 
        repeating-linear-gradient(0deg, transparent, transparent 20px, rgba(77, 208, 225, 0.015) 20px, rgba(77, 208, 225, 0.015) 22px),
        repeating-linear-gradient(90deg, transparent, transparent 20px, rgba(77, 208, 225, 0.015) 20px, rgba(77, 208, 225, 0.015) 22px);
    opacity: 0.5;
    animation: gridMove 30s linear infinite;
    z-index: 1;
}

.kit-image-label {
    color: var(--text-muted);
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-medium);
    text-transform: uppercase;
    letter-spacing: 2px;
    margin-top: var(--spacing-sm);
    position: relative;
    z-index: 3;
}

.kit-image-content {
    position: relative;
    z-index: 2;
    text-align: center;
}

.kit-icon {
    font-size: var(--font-size-5xl);
    display: block;
    position: relative;
    z-index: 3;
    transition: all var(--transition-base);
    filter: drop-shadow(0 0 10px rgba(77, 208, 225, 0.2));
}

.kit-card:hover .kit-icon {
    transform: scale(1.2) rotate(5deg);
    filter: drop-shadow(0 0 20px rgba(77, 208, 225, 0.4));
}

.kit-content {
    padding: var(--spacing-xl);
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.kit-title {
    font-size: var(--font-size-lg);
    color: var(--neon-cyan);
    font-weight: var(--font-weight-semibold);
    line-height: 1.4;
    position: relative;
    z-index: 3;
    transition: color var(--transition-base);
    margin-bottom: var(--spacing-sm);
}

.kit-card:hover .kit-title {
    color: var(--text-primary);
    text-shadow: 0 0 10px rgba(77, 208, 225, 0.3);
}

.kit-description {
    color: var(--text-secondary);
    font-size: var(--font-size-base);
    line-height: 1.8;
    margin-bottom: var(--spacing-md);
    flex: 1;
}

.level-description-secondary {
    font-size: var(--font-size-base);
    color: var(--text-secondary);
    line-height: 1.8;
    margin-top: var(--spacing-md);
    max-width: 800px;
}

.kit-features {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.kit-features li {
    color: var(--text-muted);
    font-size: var(--font-size-xs);
    line-height: 1.5;
    padding-left: var(--spacing-md);
    position: relative;
}

.kit-features li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: var(--neon-cyan);
    font-weight: var(--font-weight-bold);
}

/* ===== DOMAIN-WISE KITS SECTION ===== */
.domain-kits {
    padding: var(--spacing-5xl) 0;
    background: var(--bg-primary);
}

.domain-category {
    margin-bottom: var(--spacing-3xl);
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-xl);
    overflow: hidden;
    transition: all var(--transition-base);
    position: relative;
}

.domain-category::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient-primary);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.4s ease-out;
    z-index: 1;
}

.domain-category:hover::before,
.domain-category.active::before {
    transform: scaleX(1);
}

.domain-category:hover {
    border-color: var(--neon-cyan);
    box-shadow: 0 10px 40px rgba(77, 208, 225, 0.15), 0 0 30px rgba(77, 208, 225, 0.1);
    transform: translateY(-5px);
}

.domain-category.active {
    border-color: var(--neon-cyan);
    box-shadow: 0 10px 40px rgba(77, 208, 225, 0.2), 0 0 30px rgba(77, 208, 225, 0.15);
}

.domain-category-header {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-xl) var(--spacing-2xl);
    background: transparent;
    border: none;
    cursor: pointer;
    transition: all var(--transition-base);
    text-align: left;
}

.domain-category-header:hover {
    background: rgba(77, 208, 225, 0.03);
}

.domain-category-title {
    font-size: var(--font-size-2xl);
    font-weight: var(--font-weight-bold);
    color: var(--text-primary);
    margin: 0;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.domain-toggle-icon {
    color: var(--neon-cyan);
    transition: transform var(--transition-base);
    flex-shrink: 0;
}

.domain-category.active .domain-toggle-icon {
    transform: rotate(180deg);
}

.domain-kits-content {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.6s cubic-bezier(0.4, 0, 0.2, 1), padding 0.6s ease-out, opacity 0.4s ease-out;
    padding: 0 var(--spacing-2xl);
    opacity: 0;
}

.domain-category.active .domain-kits-content {
    max-height: 2000px;
    padding: var(--spacing-2xl);
    opacity: 1;
}

.domain-kits-content .kit-card {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.4s ease-out, transform 0.4s ease-out;
}

.domain-category.active .domain-kits-content .kit-card {
    opacity: 1;
    transform: translateY(0);
}

.domain-category.active .domain-kits-content .kit-card:nth-child(1) { transition-delay: 0.1s; }
.domain-category.active .domain-kits-content .kit-card:nth-child(2) { transition-delay: 0.2s; }
.domain-category.active .domain-kits-content .kit-card:nth-child(3) { transition-delay: 0.3s; }
.domain-category.active .domain-kits-content .kit-card:nth-child(4) { transition-delay: 0.4s; }

/* ===== WHAT'S INCLUDED SECTION ===== */
.whats-included {
    padding: var(--spacing-5xl) 0;
    background: var(--bg-secondary);
}

.included-checklist {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-lg);
    max-width: 1000px;
    margin: 0 auto;
}

.included-checklist .checklist-item {
    justify-content: center;
    text-align: center;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.included-checklist .check-icon {
    font-size: var(--font-size-3xl);
}

.included-checklist .check-text {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-medium);
}

/* ===== INSTITUTIONAL SUPPORT SECTION ===== */
.institutional-support {
    padding: var(--spacing-5xl) 0;
    background: var(--bg-primary);
}

.support-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-xl);
}

.support-item {
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-2xl);
    text-align: center;
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.support-item::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
  background: radial-gradient(circle, rgba(77, 208, 199, 0.05) 0%, transparent 70%);
  opacity: 0;
  transition: opacity 0.5s ease-out;
}

.support-item:hover::before {
    opacity: 1;
    animation: rotate 10s linear infinite;
}

.support-item:hover {
    transform: translateY(-15px) scale(1.05);
    border-color: var(--neon-teal);
    box-shadow: 0 20px 60px rgba(77, 208, 199, 0.25), var(--glow-teal);
    background: rgba(77, 208, 199, 0.04);
}

.support-item:nth-child(1) { transition-delay: 0s; }
.support-item:nth-child(2) { transition-delay: 0.1s; }
.support-item:nth-child(3) { transition-delay: 0.2s; }
.support-item:nth-child(4) { transition-delay: 0.3s; }

.support-icon {
    font-size: var(--font-size-4xl);
    margin-bottom: var(--spacing-md);
    display: block;
    position: relative;
    z-index: 2;
    filter: drop-shadow(0 0 10px rgba(77, 208, 199, 0.2));
    transition: all var(--transition-base);
}

.support-item:hover .support-icon {
    transform: scale(1.2) rotate(5deg);
    filter: drop-shadow(0 0 20px rgba(77, 208, 199, 0.4));
}

.support-title {
    font-size: var(--font-size-xl);
    color: var(--neon-teal);
    font-weight: var(--font-weight-semibold);
    margin-bottom: var(--spacing-sm);
    position: relative;
    z-index: 2;
    transition: color var(--transition-base);
}

.support-item:hover .support-title {
    color: var(--text-primary);
    text-shadow: 0 0 10px rgba(77, 208, 199, 0.3);
}

.support-description {
    color: var(--text-secondary);
    line-height: 1.6;
    font-size: var(--font-size-base);
    position: relative;
    z-index: 2;
    transition: color var(--transition-base);
}

.support-item:hover .support-description {
    color: var(--text-primary);
}

/* ===== SUITABLE FOR SECTION ===== */
.suitable-for {
    padding: var(--spacing-5xl) 0;
    background: var(--bg-secondary);
}

.suitable-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-lg);
    justify-content: center;
    max-width: 1000px;
    margin: 0 auto;
}

.suitable-tag {
    padding: var(--spacing-md) var(--spacing-xl);
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-full);
    color: var(--text-secondary);
    font-weight: var(--font-weight-medium);
    transition: all var(--transition-base);
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.suitable-tag::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(149, 117, 205, 0.15);
    transform: translate(-50%, -50%);
    transition: width 0.4s ease-out, height 0.4s ease-out;
}

.suitable-tag:hover::before {
    width: 300px;
    height: 300px;
}

.suitable-tag:hover {
    transform: translateY(-8px) scale(1.1);
    border-color: var(--neon-violet);
    color: var(--neon-violet);
    box-shadow: 0 10px 40px rgba(149, 117, 205, 0.25), var(--glow-violet);
    background: rgba(149, 117, 205, 0.08);
}

.suitable-tag span {
    position: relative;
    z-index: 1;
}

/* ===== CATALOG DOWNLOAD SECTION ===== */
.catalog-download {
    padding: var(--spacing-5xl) 0;
    background: linear-gradient(135deg, rgba(77, 208, 225, 0.03) 0%, rgba(149, 117, 205, 0.03) 100%);
    position: relative;
    overflow: hidden;
}

.catalog-download::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(77, 208, 225, 0.05) 0%, transparent 70%);
    animation: rotate 20s linear infinite;
    pointer-events: none;
}

.catalog-download::after {
    content: '';
    position: absolute;
    bottom: -50%;
    right: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(149, 117, 205, 0.05) 0%, transparent 70%);
    animation: rotate 25s linear infinite reverse;
    pointer-events: none;
}

.catalog-download-content {
    position: relative;
    z-index: 1;
    text-align: center;
    max-width: 900px;
    margin: 0 auto;
    padding: var(--spacing-3xl) var(--spacing-xl);
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-xl);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
}

.catalog-icon-wrapper {
    margin-bottom: var(--spacing-xl);
    display: flex;
    justify-content: center;
    align-items: center;
}

.catalog-icon {
    font-size: var(--font-size-5xl);
    width: 120px;
    height: 120px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(77, 208, 225, 0.1);
    border: 2px solid rgba(77, 208, 225, 0.2);
    border-radius: var(--radius-full);
    transition: all var(--transition-base);
    animation: float 3s ease-in-out infinite;
    filter: drop-shadow(0 0 20px rgba(77, 208, 225, 0.3));
}

.catalog-download-content:hover .catalog-icon {
    transform: scale(1.1) rotate(5deg);
    background: rgba(77, 208, 225, 0.15);
    border-color: var(--neon-cyan);
    box-shadow: 0 0 30px rgba(77, 208, 225, 0.4);
}

.catalog-title {
    font-size: var(--font-size-3xl);
    font-weight: var(--font-weight-bold);
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.catalog-description {
    font-size: var(--font-size-lg);
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: var(--spacing-2xl);
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.catalog-features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-3xl);
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.catalog-feature-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md);
    background: rgba(77, 208, 225, 0.05);
    border: 1px solid rgba(77, 208, 225, 0.1);
    border-radius: var(--radius-md);
    transition: all var(--transition-base);
}

.catalog-feature-item:hover {
    background: rgba(77, 208, 225, 0.1);
    border-color: var(--neon-cyan);
    transform: translateY(-3px);
}

.feature-icon {
    color: var(--neon-cyan);
    font-weight: var(--font-weight-bold);
    font-size: var(--font-size-lg);
    flex-shrink: 0;
}

.feature-text {
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
}

.catalog-download-btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-lg) var(--spacing-3xl);
    background: var(--gradient-primary);
    border: 2px solid var(--neon-cyan);
    border-radius: var(--radius-full);
    color: var(--text-primary);
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-semibold);
    text-decoration: none;
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
    box-shadow: 0 10px 30px rgba(77, 208, 225, 0.2);
    min-height: 56px; /* Better touch target */
    white-space: nowrap;
}

.catalog-download-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s ease-out;
}

.catalog-download-btn:hover::before {
    left: 100%;
}

.catalog-download-btn:hover {
    transform: translateY(-5px) scale(1.05);
    box-shadow: 0 20px 50px rgba(77, 208, 225, 0.4), var(--glow-cyan);
    border-color: var(--neon-cyan);
    background: linear-gradient(135deg, rgba(77, 208, 225, 0.2) 0%, rgba(149, 117, 205, 0.2) 100%);
}

.catalog-download-btn:active {
    transform: translateY(-2px) scale(1.02);
}

.btn-icon {
    font-size: var(--font-size-xl);
    transition: transform var(--transition-base);
}

.catalog-download-btn:hover .btn-icon {
    transform: translateY(-3px);
}

.btn-text {
    position: relative;
    z-index: 1;
}

.btn-arrow {
    font-size: var(--font-size-xl);
    transition: transform var(--transition-base);
    position: relative;
    z-index: 1;
}

.catalog-download-btn:hover .btn-arrow {
    transform: translateX(5px);
}

/* ===== ANIMATIONS ===== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes gridMove {
    from {
        transform: translate(0, 0);
    }
    to {
        transform: translate(100px, 100px);
    }
}

@keyframes pulse {
    0%, 100% {
        opacity: 1;
        transform: scale(1);
    }
    50% {
        opacity: 0.8;
        transform: scale(1.05);
    }
}

@keyframes float {
    0%, 100% {
        transform: translateY(0px);
    }
    50% {
        transform: translateY(-10px);
    }
}

.kit-icon {
    animation: float 3s ease-in-out infinite;
}

.kit-card:nth-child(1) .kit-icon { animation-delay: 0s; }
.kit-card:nth-child(2) .kit-icon { animation-delay: 0.5s; }
.kit-card:nth-child(3) .kit-icon { animation-delay: 1s; }
.kit-card:nth-child(4) .kit-icon { animation-delay: 1.5s; }

.support-icon {
    animation: pulse 2s ease-in-out infinite;
}

.support-item:nth-child(1) .support-icon { animation-delay: 0s; }
.support-item:nth-child(2) .support-icon { animation-delay: 0.5s; }
.support-item:nth-child(3) .support-icon { animation-delay: 1s; }
.support-item:nth-child(4) .support-icon { animation-delay: 1.5s; }

/* ===== RESPONSIVE DESIGN ===== */
@media (max-width: 968px) {
    .about-stem-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-2xl);
    }
    
    /* Text first, then image on mobile */
    .about-stem-text {
        order: 1 !important;
    }
    
    .about-stem-visual {
        order: 2 !important;
    }
    
    .about-stem-image-placeholder {
        height: 400px;
    }
    
    .level-header-content {
        grid-template-columns: 1fr;
    }
    
    /* Text first, then image on mobile */
    .level-header-text {
        order: 1 !important;
    }
    
    .level-header-image {
        order: 2 !important;
    }
    
    .level-header-content.reverse .level-header-text {
        order: 1 !important;
    }
    
    .level-header-content.reverse .level-header-image {
        order: 2 !important;
    }
    
    .specialization-grid {
        grid-template-columns: 1fr;
    }
    
    .why-choose-content {
        grid-template-columns: 1fr;
    }
    
    /* Text first, then visual on mobile */
    .why-choose-text {
        order: 1 !important;
    }
    
    .why-choose-visual {
        order: 2 !important;
    }
    
    .stem-hero-title {
        font-size: var(--font-size-4xl);
    }
    
    .level-title,
    .section-title {
        font-size: var(--font-size-3xl);
    }
    
    .domain-category-title {
        font-size: var(--font-size-xl);
    }
}

@media (max-width: 768px) {
    .kit-grid {
        grid-template-columns: 1fr;
    }
    
    .kit-card {
        display: flex;
        flex-direction: column;
    }
    
    /* Content first, then image on mobile */
    .kit-content {
        order: 1 !important;
    }
    
    .kit-image-placeholder {
        order: 2 !important;
    }
    
    .about-stem-content {
        grid-template-columns: 1fr;
    }
    
    /* Text first, then image on mobile */
    .about-stem-text {
        order: 1 !important;
    }
    
    .about-stem-visual {
        order: 2 !important;
    }
    
    .about-stem-image-placeholder {
        height: 300px;
    }
    
    /* Why choose section - text first, then visual */
    .why-choose-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-2xl);
    }
    
    .why-choose-text {
        order: 1 !important;
    }
    
    .why-choose-visual {
        order: 2 !important;
        min-height: 300px;
    }
    
    .contact-strip {
        flex-direction: column;
        gap: var(--spacing-sm);
    }
    
    .domains-line {
        flex-direction: column;
        gap: var(--spacing-xs);
    }
    
    .domain-separator {
        display: none;
    }
    
    .included-checklist {
        grid-template-columns: 1fr;
    }
    
    .support-grid {
        grid-template-columns: 1fr;
    }
    
    .suitable-tags {
        flex-direction: column;
        align-items: center;
    }
    
    .catalog-download-content {
        padding: var(--spacing-2xl) var(--spacing-lg);
    }
    
    .catalog-title {
        font-size: var(--font-size-2xl);
    }
    
    .catalog-description {
        font-size: var(--font-size-base);
    }
    
    .catalog-features {
        grid-template-columns: 1fr;
    }
    
    .catalog-download-btn {
        width: 100%;
        max-width: 100%;
        padding: var(--spacing-lg) var(--spacing-xl);
        font-size: var(--font-size-base);
        justify-content: center;
        gap: var(--spacing-sm);
        min-height: 52px;
    }
    
    .btn-icon,
    .btn-arrow {
        font-size: var(--font-size-lg);
    }
}

@media (max-width: 480px) {
    .stem-hero {
        min-height: 50vh;
        padding: 80px var(--spacing-sm) var(--spacing-xl);
    }
    
    .stem-hero-title {
        font-size: var(--font-size-2xl);
    }
    
    .stem-hero-subtitle {
        font-size: var(--font-size-base);
    }
    
    .level-title,
    .section-title {
        font-size: var(--font-size-xl);
    }
    
    .domain-category-title {
        font-size: var(--font-size-lg);
    }
    
    .kit-card {
        padding: var(--spacing-lg);
    }
    
    .kit-title {
        font-size: var(--font-size-lg);
    }
    
    .kit-description {
        font-size: var(--font-size-sm);
    }
    
    .kit-features {
        gap: var(--spacing-xs);
    }
    
    .kit-feature {
        font-size: var(--font-size-xs);
        padding: var(--spacing-xs);
    }
    
    .kit-image-placeholder {
        height: 150px;
        min-height: 150px;
    }
    
    .included-checklist {
        grid-template-columns: 1fr;
    }
    
    .support-grid {
        grid-template-columns: 1fr;
    }
    
    .suitable-tags {
        flex-wrap: wrap;
    }
    
    .catalog-title {
        font-size: var(--font-size-xl);
    }
    
    .catalog-description {
        font-size: var(--font-size-sm);
    }
    
    .catalog-icon {
        width: 100px;
        height: 100px;
        font-size: var(--font-size-4xl);
    }
    
    .catalog-download-content {
        padding: var(--spacing-xl) var(--spacing-md);
    }
    
    .catalog-download-btn {
        width: 100%;
        max-width: 100%;
        padding: var(--spacing-md) var(--spacing-lg);
        font-size: var(--font-size-sm);
        justify-content: center;
        gap: var(--spacing-xs);
        min-height: 48px; /* Better touch target */
    }
    
    .btn-icon {
        font-size: var(--font-size-base);
    }
    
    .btn-arrow {
        font-size: var(--font-size-base);
    }
    
    .btn-text {
        flex: 1;
        text-align: center;
        white-space: nowrap;
        overflow: hidden;
        text-overflow: ellipsis;
    }
}

/* ===== 360px SMARTPHONE SPECIFIC STYLES ===== */
@media (max-width: 360px) {
    .stem-hero {
        min-height: 40vh;
        padding: 70px var(--spacing-xs) var(--spacing-lg);
    }
    
    .stem-hero-content {
        padding: 0 var(--spacing-xs);
    }
    
    .stem-hero-title {
        font-size: var(--font-size-xl);
        line-height: 1.3;
    }
    
    .stem-hero-subtitle {
        font-size: var(--font-size-sm);
        line-height: 1.5;
    }
    
    .level-title,
    .section-title {
        font-size: var(--font-size-lg);
    }
    
    .domain-category-title {
        font-size: var(--font-size-base);
    }
    
    .kit-card {
        padding: var(--spacing-md);
    }
    
    .kit-title {
        font-size: var(--font-size-base);
        line-height: 1.3;
    }
    
    .kit-description {
        font-size: var(--font-size-xs);
        line-height: 1.5;
    }
    
    .kit-features {
        gap: var(--spacing-xs);
    }
    
    .kit-feature {
        font-size: 10px;
        padding: var(--spacing-xs);
    }
    
    .kit-image-placeholder {
        height: 130px;
        min-height: 130px;
    }
    
    .included-checklist {
        grid-template-columns: 1fr;
        gap: var(--spacing-xs);
    }
    
    .checklist-item {
        font-size: var(--font-size-xs);
        padding: var(--spacing-xs);
    }
    
    .support-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }
    
    .support-card {
        padding: var(--spacing-md);
    }
    
    .support-title {
        font-size: var(--font-size-base);
    }
    
    .support-description {
        font-size: var(--font-size-xs);
    }
    
    .suitable-tags {
        flex-wrap: wrap;
        gap: var(--spacing-xs);
    }
    
    .suitable-tag {
        font-size: var(--font-size-xs);
        padding: var(--spacing-xs) var(--spacing-sm);
    }
    
    .catalog-title {
        font-size: var(--font-size-lg);
    }
    
    .catalog-description {
        font-size: var(--font-size-xs);
    }
    
    .catalog-icon {
        width: 80px;
        height: 80px;
        font-size: var(--font-size-3xl);
    }
    
    .catalog-features {
        gap: var(--spacing-sm);
    }
    
    .catalog-feature-item {
        padding: var(--spacing-sm);
    }
    
    .feature-text {
        font-size: var(--font-size-xs);
    }
    
    .catalog-download-content {
        padding: var(--spacing-lg) var(--spacing-sm);
    }
    
    .catalog-download-btn {
        width: 100%;
        max-width: 100%;
        padding: var(--spacing-sm) var(--spacing-md);
        font-size: var(--font-size-xs);
        justify-content: center;
        gap: var(--spacing-xs);
        min-height: 44px; /* Minimum touch target */
        border-width: 1.5px; /* Slightly thinner border on very small screens */
    }
    
    .btn-icon {
        font-size: var(--font-size-sm);
    }
    
    .btn-arrow {
        font-size: var(--font-size-sm);
    }
    
    .btn-text {
        flex: 1;
        text-align: center;
        white-space: normal;
        line-height: 1.3;
    }
}