/* ===================================
   Differentiation Section - Modern Redesign
   =================================== */

.differentiation-section {
    position: relative;
    background: linear-gradient(180deg, #ffffff 0%, #f8f9fa 50%, #ffffff 100%);
    padding: 100px 0;
    overflow: hidden;
}

/* Animated Background */
.diff-background {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 20% 30%, rgba(212, 175, 55, 0.05) 0%, transparent 50%),
        radial-gradient(circle at 80% 70%, rgba(26, 95, 122, 0.05) 0%, transparent 50%),
        radial-gradient(circle at 50% 50%, rgba(200, 90, 84, 0.03) 0%, transparent 50%);
    animation: backgroundFloat 20s ease-in-out infinite;
    z-index: 0;
}

@keyframes backgroundFloat {
    0%, 100% { transform: translate(0, 0); }
    50% { transform: translate(15px, -15px); }
}

/* Section Header */
.differentiation-section .section-header {
    position: relative;
    z-index: 1;
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.differentiation-section .section-badge {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    background: linear-gradient(135deg, rgba(212, 175, 55, 0.1), rgba(212, 175, 55, 0.05));
    border: 2px solid rgba(212, 175, 55, 0.3);
    padding: 10px 24px;
    border-radius: 50px;
    margin-bottom: var(--spacing-md);
    transition: all 0.3s ease;
}

.differentiation-section .section-badge:hover {
    background: linear-gradient(135deg, rgba(212, 175, 55, 0.15), rgba(212, 175, 55, 0.08));
    transform: scale(1.05);
}

.differentiation-section .badge-icon {
    font-size: 1.3rem;
    animation: starRotate 3s ease-in-out infinite;
}

@keyframes starRotate {
    0%, 100% { transform: rotate(0deg) scale(1); }
    50% { transform: rotate(180deg) scale(1.2); }
}

.differentiation-section .badge-text {
    color: var(--secondary-color);
    font-weight: 600;
    font-size: 1rem;
}

.differentiation-section .section-title {
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 900;
    color: var(--primary-color);
    margin: var(--spacing-sm) 0;
    line-height: 1.2;
}

.differentiation-section .title-underline {
    width: 100px;
    height: 4px;
    background: linear-gradient(90deg, var(--secondary-color), var(--accent-color));
    margin: var(--spacing-md) auto 0;
    border-radius: 2px;
    animation: expandLine 1s ease-out;
}

@keyframes expandLine {
    0% { width: 0; }
    100% { width: 100px; }
}

/* What We Are NOT Section */
.diff-intro {
    position: relative;
    z-index: 1;
    max-width: 700px;
    margin: 0 auto var(--spacing-xl);
}

.not-section {
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(10px);
    padding: var(--spacing-lg);
    border-radius: var(--radius-xl);
    border: 2px solid rgba(200, 90, 84, 0.2);
    box-shadow: 0 10px 40px rgba(200, 90, 84, 0.1);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    transition: all 0.3s ease;
}

.not-section:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 50px rgba(200, 90, 84, 0.15);
}

.not-icon {
    font-size: 3rem;
    flex-shrink: 0;
    animation: shake 2s ease-in-out infinite;
}

@keyframes shake {
    0%, 100% { transform: rotate(0deg); }
    25% { transform: rotate(-5deg); }
    75% { transform: rotate(5deg); }
}

.not-content {
    flex: 1;
}

.not-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--accent-color);
    margin-bottom: var(--spacing-sm);
}

.not-items {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.not-item {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.1rem;
    color: var(--text-dark);
    padding: 8px 12px;
    background: rgba(200, 90, 84, 0.05);
    border-radius: var(--radius-md);
    transition: all 0.3s ease;
}

.not-item:hover {
    background: rgba(200, 90, 84, 0.1);
    transform: translateX(-5px);
}

.cross-icon {
    color: var(--accent-color);
    font-weight: bold;
    font-size: 1.3rem;
}

/* Academy Definition */
.academy-definition {
    position: relative;
    z-index: 1;
    max-width: 900px;
    margin: 0 auto var(--spacing-xl);
    padding: var(--spacing-xl);
    background: linear-gradient(135deg, #1a5f7a 0%, #0a2540 100%);
    border-radius: var(--radius-xxl);
    box-shadow: 0 20px 60px rgba(26, 95, 122, 0.3);
    text-align: center;
    overflow: hidden;
    border: 3px solid rgba(212, 175, 55, 0.3);
}

.academy-definition::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(212, 175, 55, 0.1) 0%, transparent 70%);
    animation: rotateGlow 15s linear infinite;
}

@keyframes rotateGlow {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.definition-icon {
    position: relative;
    z-index: 1;
    font-size: 4rem;
    margin-bottom: var(--spacing-md);
    animation: targetPulse 2s ease-in-out infinite;
}

@keyframes targetPulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.15); }
}

.definition-title {
    position: relative;
    z-index: 1;
    font-size: clamp(1.5rem, 4vw, 2rem);
    font-weight: 800;
    color: white;
    margin-bottom: var(--spacing-md);
    line-height: 1.5;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
}

.definition-subtitle {
    position: relative;
    z-index: 1;
    font-size: 1.2rem;
    color: var(--secondary-color);
    font-weight: 600;
    margin-bottom: var(--spacing-md);
}

.definition-decoration {
    position: relative;
    z-index: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    margin-top: var(--spacing-lg);
}

.deco-line {
    width: 60px;
    height: 2px;
    background: linear-gradient(90deg, transparent, rgba(212, 175, 55, 0.8));
}

.deco-line:last-child {
    background: linear-gradient(90deg, rgba(212, 175, 55, 0.8), transparent);
}

.deco-dot {
    width: 8px;
    height: 8px;
    background: var(--secondary-color);
    border-radius: 50%;
    animation: dotPulse 2s ease-in-out infinite;
}

@keyframes dotPulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.5); }
}

/* Levels Grid */
.levels-grid {
    position: relative;
    z-index: 1;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
    max-width: 1400px;
    margin-left: auto;
    margin-right: auto;
}

.level-card {
    position: relative;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    border: 2px solid rgba(255, 255, 255, 0.5);
}

.level-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 5px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    transform: scaleX(0);
    transform-origin: right;
    transition: transform 0.4s ease;
    z-index: 2;
}

.level-card:hover {
    transform: translateY(-15px) scale(1.02);
    box-shadow: 0 25px 60px rgba(0, 0, 0, 0.15);
    border-color: rgba(212, 175, 55, 0.4);
}

.level-card:hover::before {
    transform: scaleX(1);
    transform-origin: left;
}

.level-number {
    position: absolute;
    top: 15px;
    right: 15px;
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, var(--secondary-color), var(--accent-color));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.3rem;
    font-weight: 900;
    color: white;
    z-index: 2;
    box-shadow: 0 5px 15px rgba(212, 175, 55, 0.4);
    transition: all 0.3s ease;
}

.level-card:hover .level-number {
    transform: rotate(360deg) scale(1.1);
}

.level-icon-wrapper {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-lg) 0 var(--spacing-md);
    background: linear-gradient(180deg, rgba(26, 95, 122, 0.05), transparent);
}

.level-icon {
    font-size: 4rem;
    animation: iconBounce 3s ease-in-out infinite;
}

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

.level-header {
    text-align: center;
    padding: 0 var(--spacing-md) var(--spacing-md);
}

.level-header h4 {
    font-size: 1.6rem;
    font-weight: 800;
    color: var(--primary-color);
    margin-bottom: 5px;
}

.level-subtitle {
    font-size: 0.9rem;
    color: var(--text-light);
    font-style: italic;
    font-weight: 500;
}

.level-content {
    padding: var(--spacing-md);
    background: rgba(26, 95, 122, 0.03);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.skill-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 15px;
    background: white;
    border-radius: var(--radius-md);
    border-right: 3px solid var(--secondary-color);
    transition: all 0.3s ease;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}

.skill-item:hover {
    transform: translateX(-5px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    border-right-color: var(--accent-color);
}

.skill-icon {
    font-size: 1.3rem;
    flex-shrink: 0;
}

.skill-item span:last-child {
    font-size: 1.05rem;
    color: var(--text-dark);
    font-weight: 600;
}

.level-image {
    position: relative;
    height: 200px;
    overflow: hidden;
}

.level-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.level-card:hover .level-image img {
    transform: scale(1.15);
}

.image-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(180deg, transparent 0%, rgba(26, 95, 122, 0.3) 100%);
    opacity: 0;
    transition: opacity 0.4s ease;
}

.level-card:hover .image-overlay {
    opacity: 1;
}

/* Bottom CTA */
.diff-cta {
    position: relative;
    z-index: 1;
    max-width: 800px;
    margin: 0 auto;
    padding: var(--spacing-xl);
    background: linear-gradient(135deg, rgba(212, 175, 55, 0.1), rgba(26, 95, 122, 0.1));
    backdrop-filter: blur(15px);
    border-radius: var(--radius-xxl);
    border: 3px solid rgba(212, 175, 55, 0.3);
    box-shadow: 0 15px 50px rgba(0, 0, 0, 0.1);
    text-align: center;
}

.cta-content h3 {
    font-size: clamp(1.5rem, 3vw, 2rem);
    font-weight: 800;
    color: var(--primary-color);
    margin-bottom: var(--spacing-sm);
    line-height: 1.4;
}

.cta-content p {
    font-size: 1.2rem;
    color: var(--text-dark);
    font-weight: 500;
    font-style: italic;
}

/* Animation Classes */
.differentiation-section .animate-element {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

.differentiation-section .animate-element.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ===================================
   Responsive Design
   =================================== */

@media (max-width: 968px) {
    .levels-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-md);
    }
}

@media (max-width: 768px) {
    .differentiation-section {
        padding: 80px 0;
    }
    
    .levels-grid {
        grid-template-columns: 1fr;
    }
    
    .not-section {
        flex-direction: column;
        text-align: center;
        padding: var(--spacing-md);
    }
    
    .not-icon {
        font-size: 2.5rem;
    }
    
    .academy-definition {
        padding: var(--spacing-lg);
    }
    
    .definition-title {
        font-size: 1.5rem;
    }
    
    .definition-subtitle {
        font-size: 1.1rem;
    }
    
    .level-icon {
        font-size: 3rem;
    }
    
    .diff-cta {
        padding: var(--spacing-lg);
    }
}

@media (max-width: 480px) {
    .differentiation-section {
        padding: 60px 0;
    }
    
    .differentiation-section .section-title {
        font-size: 1.8rem;
    }
    
    .not-title {
        font-size: 1.3rem;
    }
    
    .not-item {
        font-size: 1rem;
    }
    
    .definition-icon {
        font-size: 3rem;
    }
    
    .level-number {
        width: 40px;
        height: 40px;
        font-size: 1.1rem;
    }
    
    .level-header h4 {
        font-size: 1.3rem;
    }
    
    .level-subtitle {
        font-size: 0.85rem;
    }
    
    .skill-item {
        padding: 10px 12px;
    }
    
    .skill-icon {
        font-size: 1.1rem;
    }
    
    .skill-item span:last-child {
        font-size: 0.95rem;
    }
    
    .level-image {
        height: 150px;
    }
    
    .cta-content h3 {
        font-size: 1.3rem;
    }
    
    .cta-content p {
        font-size: 1rem;
    }
}