/* About Page Styles */
:root {
    --about-primary: #4a90e2;
    --about-secondary: #67b26f;
    --about-accent: #4facfe;
    --about-text: #2c3e50;
    --about-bg: #ffffff;
    --about-card-bg: #f8f9fa;
    --about-border: #e9ecef;
    --about-gradient: linear-gradient(135deg, var(--about-primary), var(--about-secondary));
    --about-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
    --about-transition: all 0.3s ease;
}

/* About Header Section */
.about-header {
    background: var(--about-gradient);
    color: white;
    padding: 6rem 2rem;
    text-align: center;
    position: relative;
    overflow: hidden;
    margin-bottom: 4rem;
}

.about-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.1'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
    opacity: 0.1;
    animation: slideBackground 20s linear infinite;
}

.about-header h1 {
    font-size: 4rem;
    margin-bottom: 1.5rem;
    position: relative;
    animation: fadeInDown 1s ease-out;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.1);
}

.about-header p {
    font-size: 1.8rem;
    opacity: 0.9;
    position: relative;
    animation: fadeInUp 1s ease-out 0.3s backwards;
    max-width: 800px;
    margin: 0 auto;
    line-height: 1.4;
}

/* About Content Section */
.about-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 4rem 2rem;
}

.about-intro {
    text-align: center;
    max-width: 800px;
    margin: 0 auto 6rem;
    font-size: 1.3rem;
    line-height: 1.8;
    color: var(--about-text);
    animation: fadeIn 1s ease-out;
    position: relative;
}

.about-intro::after {
    content: '';
    display: block;
    width: 100px;
    height: 4px;
    background: var(--about-gradient);
    margin: 2rem auto 0;
    border-radius: 2px;
}

/* Features Section */
.features-section {
    background: var(--about-card-bg);
    border-radius: 20px;
    padding: 4rem;
    margin-bottom: 6rem;
    box-shadow: var(--about-shadow);
    animation: slideUp 1s ease-out;
    position: relative;
    overflow: hidden;
}

.features-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--about-gradient);
}

.features-section h2 {
    color: var(--about-primary);
    font-size: 2.8rem;
    margin-bottom: 3rem;
    text-align: center;
    position: relative;
}

.features-section h2::after {
    content: '';
    display: block;
    width: 80px;
    height: 4px;
    background: var(--about-gradient);
    margin: 1rem auto 0;
    border-radius: 2px;
}

.features-section h3 {
    color: var(--about-secondary);
    font-size: 2rem;
    margin: 3rem 0 1.5rem;
    position: relative;
    padding-bottom: 0.5rem;
    display: flex;
    align-items: center;
    gap: 1rem;
}

.features-section h3::before {
    content: '';
    display: inline-block;
    width: 40px;
    height: 40px;
    background-size: contain;
    background-repeat: no-repeat;
    background-position: center;
    transition: var(--about-transition);
}

.features-section h3:hover::before {
    transform: scale(1.1);
}

.features-section h3[data-icon="library"]::before {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='%2367b26f'%3E%3Cpath d='M12 11.55C9.64 9.35 6.48 8 3 8v11c3.48 0 6.64 1.35 9 3.55 2.36-2.19 5.52-3.55 9-3.55V8c-3.48 0-6.64 1.35-9 3.55zM12 8c1.66 0 3-1.34 3-3s-1.34-3-3-3-3 1.34-3 3 1.34 3 3 3z'/%3E%3C/svg%3E");
}

.feature-list {
    list-style: none;
    padding: 0;
    margin: 2rem 0;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.feature-list li {
    padding: 2rem;
    background: white;
    border-radius: 15px;
    box-shadow: var(--about-shadow);
    transition: var(--about-transition);
    position: relative;
    overflow: hidden;
    border: 1px solid var(--about-border);
}

.feature-list li::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: var(--about-gradient);
    opacity: 0;
    transition: var(--about-transition);
}

.feature-list li:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.1);
    border-color: var(--about-primary);
}

.feature-list li:hover::before {
    opacity: 1;
}

.feature-list strong {
    color: var(--about-primary);
    font-weight: 600;
    display: block;
    margin-bottom: 1rem;
    font-size: 1.2rem;
    position: relative;
    padding-left: 2rem;
}

.feature-list strong::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 12px;
    height: 12px;
    background: var(--about-secondary);
    border-radius: 50%;
    transition: var(--about-transition);
}

.feature-list li:hover strong::before {
    transform: translateY(-50%) scale(1.2);
}

.feature-list li p {
    color: var(--about-text);
    margin: 0;
    line-height: 1.6;
    font-size: 1rem;
}

/* Subject-specific colors */
.feature-list li[data-subject="sciences"] strong::before { background: #4CAF50; }
.feature-list li[data-subject="mathematics"] strong::before { background: #2196F3; }
.feature-list li[data-subject="humanities"] strong::before { background: #9C27B0; }
.feature-list li[data-subject="professional"] strong::before { background: #FF9800; }

/* Target Audience Section */
.target-audience {
    background: var(--about-gradient);
    color: white;
    padding: 4rem;
    border-radius: 20px;
    margin-bottom: 6rem;
    animation: slideUp 1s ease-out 0.2s backwards;
    position: relative;
    overflow: hidden;
}

.target-audience::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.1'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
    opacity: 0.1;
    animation: slideBackground 20s linear infinite;
}

.target-audience h2 {
    font-size: 2.8rem;
    margin-bottom: 3rem;
    text-align: center;
    position: relative;
}

.target-audience ul {
    list-style: none;
    padding: 0;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.target-audience li {
    background: rgba(255, 255, 255, 0.1);
    padding: 2rem;
    border-radius: 15px;
    backdrop-filter: blur(10px);
    transition: var(--about-transition);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.target-audience li:hover {
    transform: translateY(-5px);
    background: rgba(255, 255, 255, 0.15);
    border-color: rgba(255, 255, 255, 0.3);
}

/* Mission Section */
.mission-section {
    background: var(--about-card-bg);
    border-radius: 20px;
    padding: 4rem;
    margin-bottom: 6rem;
    animation: slideUp 1s ease-out 0.4s backwards;
    position: relative;
    overflow: hidden;
}

.mission-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--about-gradient);
}

.mission-section h2 {
    color: var(--about-primary);
    font-size: 2.8rem;
    margin-bottom: 3rem;
    text-align: center;
}

/* Platform Evolution Section */
.platform-evolution {
    background: white;
    border-radius: 20px;
    padding: 4rem;
    margin-bottom: 6rem;
    box-shadow: var(--about-shadow);
    animation: slideUp 1s ease-out 0.6s backwards;
    position: relative;
    overflow: hidden;
}

.platform-evolution::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--about-gradient);
}

.evolution-list {
    list-style: none;
    padding: 0;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.evolution-list li {
    padding: 2.5rem;
    background: var(--about-card-bg);
    border-radius: 15px;
    text-align: center;
    transition: var(--about-transition);
    border: 1px solid var(--about-border);
}

.evolution-list li:hover {
    transform: translateY(-5px);
    box-shadow: var(--about-shadow);
    border-color: var(--about-primary);
}

/* Call to Action Section */
.call-to-action {
    text-align: center;
    padding: 6rem 4rem;
    background: var(--about-gradient);
    color: white;
    border-radius: 20px;
    margin-bottom: 6rem;
    animation: slideUp 1s ease-out 0.8s backwards;
    position: relative;
    overflow: hidden;
}

.call-to-action::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.1'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
    opacity: 0.1;
    animation: slideBackground 20s linear infinite;
}

.call-to-action p {
    font-size: 1.5rem;
    margin-bottom: 3rem;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
    line-height: 1.6;
}

.cta-button {
    display: inline-block;
    padding: 1.2rem 3rem;
    background: white;
    color: var(--about-primary);
    text-decoration: none;
    border-radius: 50px;
    font-weight: 600;
    font-size: 1.3rem;
    transition: var(--about-transition);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    position: relative;
    overflow: hidden;
}

.cta-button::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(45deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transform: translateX(-100%);
    transition: 0.5s;
}

.cta-button:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.2);
}

.cta-button:hover::before {
    transform: translateX(100%);
}

/* Animations */
@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(50px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideBackground {
    from {
        background-position: 0 0;
    }
    to {
        background-position: 100% 100%;
    }
}

/* Responsive Design */
@media (max-width: 768px) {
    .about-header {
        padding: 4rem 1.5rem;
    }

    .about-header h1 {
        font-size: 2.8rem;
    }

    .about-header p {
        font-size: 1.4rem;
    }

    .about-content {
        padding: 2rem 1.5rem;
    }

    .features-section,
    .target-audience,
    .mission-section,
    .platform-evolution {
        padding: 3rem 1.5rem;
    }

    .features-section h2,
    .target-audience h2,
    .mission-section h2 {
        font-size: 2.2rem;
    }

    .features-section h3 {
        font-size: 1.8rem;
    }

    .feature-list {
        grid-template-columns: 1fr;
    }

    .call-to-action {
        padding: 4rem 1.5rem;
    }

    .call-to-action p {
        font-size: 1.2rem;
    }

    .cta-button {
        padding: 1rem 2.5rem;
        font-size: 1.2rem;
    }
}

@media (max-width: 480px) {
    .about-header h1 {
        font-size: 2.2rem;
    }

    .about-header p {
        font-size: 1.2rem;
    }

    .features-section h2,
    .target-audience h2,
    .mission-section h2 {
        font-size: 1.8rem;
    }

    .features-section h3 {
        font-size: 1.5rem;
    }

    .feature-list li {
        padding: 1.5rem;
    }
}