/* ===== About Section ===== */
.about {
    width: 100%;
    background-color: var(--bg-bluish-white);
    padding: 10rem 1rem;
    position: relative;
}

.about-container {
    max-width: 1400px;
    width: 100%;
    margin: 0 auto;
    position: relative;
    z-index: 1;
}

.about-header {
    text-align: center;
    margin-bottom: 5rem;
}

.section-badge {
    display: inline-block;
    background: var(--accent-blue-dark);
    color: var(--white);
    padding: 0.5rem 1.5rem;
    border-radius: 30px;
    font-size: 0.875rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    margin-bottom: 1.5rem;
    box-shadow: 0 4px 15px rgba(0, 71, 153, 0.3);
}

.section-title {
    font-size: clamp(2.5rem, 5vw, 4.5rem);
    font-weight: 800;
    color: var(--black);
    letter-spacing: -0.03em;
    line-height: 1.1;
    margin-bottom: 1.5rem;
}

.section-description {
    font-size: clamp(1.125rem, 2vw, 1.5rem);
    color: var(--gray-dark);
    opacity: 0.85;
    max-width: 700px;
    margin: 0 auto;
    font-weight: 400;
}

/* Modern Grid Layout */
.about-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

/* Base Card Styles */
.about-card {
    background: rgba(255, 255, 255, 0.7);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-radius: 24px;
    padding: 2.5rem;
    border: 1px solid rgba(255, 255, 255, 0.8);
    box-shadow: 0 20px 60px rgba(0, 71, 153, 0.1);
    transition: all 0.4s ease;
    position: relative;
    overflow: hidden;
}

.about-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(90deg, var(--accent-blue-light), var(--accent-blue-dark));
    border-radius: 24px 24px 0 0;
    opacity: 0;
    transition: opacity 0.4s ease;
}

.about-card:hover::before {
    opacity: 1;
}

.about-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 30px 80px rgba(0, 71, 153, 0.2);
}

.about-card h3 {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--black);
    margin-bottom: 1rem;
}

.about-card p {
    font-size: 1.0625rem;
    line-height: 1.75;
    color: var(--gray-dark);
    opacity: 0.9;
}

/* Main Card */
.main-card {
    grid-column: span 2;
    grid-row: span 2;
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.9) 0%, rgba(227, 249, 255, 0.9) 100%);
    display: flex;
    flex-direction: column;
    gap: 2rem;
    position: relative;
}

.main-card-image {
    position: absolute;
    bottom: 1.5rem;
    right: 1.5rem;
    width: 450px;
    height: auto;
    opacity: 0.5;
    pointer-events: none;
}

/* Milestones */
.milestones {
    display: flex;
    gap: 0;
    margin: 2rem 0 1.5rem;
    position: relative;
}

.milestone {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    position: relative;
}

.milestone-line {
    position: absolute;
    top: 12px;
    left: 50%;
    width: 100%;
    height: 2px;
    background: linear-gradient(90deg, var(--accent-blue-dark), var(--accent-blue-light));
    z-index: 0;
}

.milestone:last-child .milestone-line {
    display: none;
}

.milestone-dot {
    width: 24px;
    height: 24px;
    background: var(--white);
    border: 3px solid var(--accent-blue-dark);
    border-radius: 50%;
    z-index: 1;
    transition: all 0.3s ease;
    margin-bottom: 0.75rem;
}

.milestone-dot.active {
    background: var(--accent-blue-dark);
    box-shadow: 0 0 0 4px rgba(0, 71, 153, 0.2);
}

.milestone:hover .milestone-dot {
    transform: scale(1.2);
    box-shadow: 0 4px 12px rgba(0, 71, 153, 0.3);
}

.milestone-content {
    text-align: center;
}

.milestone-content h4 {
    font-size: 1rem;
    font-weight: 700;
    color: var(--accent-blue-dark);
    margin-bottom: 0.25rem;
}

.milestone-content p {
    font-size: 0.875rem;
    color: var(--gray-dark);
    opacity: 0.8;
    line-height: 1.4;
}

.card-tags {
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
    margin-top: 1.5rem;
    z-index: 100;
    position: relative;
}

.tag {
    padding: 0.5rem 1rem;
    background: rgba(0, 71, 153, 0.1);
    border-radius: 20px;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--accent-blue-dark);
}

/* Card Numbers */
.card-number {
    font-size: 5rem;
    font-weight: 900;
    color: var(--accent-blue-dark);
    opacity: 0.08;
    line-height: 1;
    margin-bottom: 0.5rem;
}

/* Process Card */
.process-card {
    grid-column: span 2;
}

.process-list {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
    margin-top: 2rem;
}

.process-item h4 {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--accent-blue-dark);
    margin-bottom: 0.5rem;
}

.process-item p {
    font-size: 0.9375rem;
    color: var(--gray-dark);
    opacity: 0.8;
}

/* Vision Card */
.vision-card {
    background: linear-gradient(135deg, var(--accent-blue-dark) 0%, var(--accent-blue-light) 100%);
    color: var(--white);
}

.vision-card h3 {
    color: var(--white);
}

.vision-card p {
    color: var(--white);
    opacity: 0.95;
}

/* Technology Card */
.tech-card {
    grid-column: span 2;
}

.tech-list {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    margin-top: 2rem;
}

.tech-item {
    padding: 0.75rem 1.5rem;
    background: rgba(0, 71, 153, 0.08);
    border: 1px solid rgba(0, 71, 153, 0.15);
    border-radius: 30px;
    font-size: 0.9375rem;
    font-weight: 600;
    color: var(--accent-blue-dark);
    transition: all 0.3s ease;
}

.tech-item:hover {
    background: var(--accent-blue-dark);
    color: var(--white);
    transform: translateY(-2px);
}

/* Responsive */
@media (max-width: 1024px) {
    .about-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .main-card {
        grid-column: span 2;
        grid-row: span 1;
    }
    
    .tech-card {
        grid-column: span 2;
    }
    
    .process-list {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .main-card-image {
        width: 300px;
        bottom: 1rem;
        right: 1rem;
    }
}

@media (max-width: 768px) {
    .about {
        padding: 6rem 1rem;
    }
    
    .about-header {
        margin-bottom: 3rem;
    }
    
    .section-title {
        font-size: clamp(2rem, 5vw, 3rem);
    }
    
    .section-description {
        font-size: clamp(1rem, 2vw, 1.25rem);
    }
    
    .about-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .main-card,
    .vision-card,
    .tech-card {
        grid-column: span 1;
        grid-row: span 1;
    }
    
    .about-card {
        padding: 2rem;
    }
    
    .about-card h3 {
        font-size: 1.5rem;
    }
    
    .about-card p {
        font-size: 1rem;
    }
    
    /* Milestones - Mobile Vertical Layout */
    .milestones {
        flex-direction: column;
        gap: 1.5rem;
        align-items: flex-start;
        padding-left: 1rem;
        margin: 1.5rem 0;
    }
    
    .milestone {
        flex-direction: row;
        align-items: flex-start;
        gap: 1rem;
        width: 100%;
    }
    
    .milestone-line {
        display: none;
    }
    
    .milestone::before {
        content: '';
        position: absolute;
        left: 11px;
        top: 28px;
        width: 2px;
        height: calc(100% + 1.5rem);
        background: linear-gradient(180deg, var(--accent-blue-dark), var(--accent-blue-light));
        z-index: 0;
    }
    
    .milestone:last-child::before {
        display: none;
    }
    
    .milestone-dot {
        margin-bottom: 0;
        flex-shrink: 0;
    }
    
    .milestone-content {
        text-align: left;
        flex: 1;
    }
    
    .milestone-content h4 {
        font-size: 1.125rem;
    }
    
    .milestone-content p {
        font-size: 0.9375rem;
    }
    
    /* Process List */
    .process-list {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    
    /* Tech List */
    .tech-list {
        gap: 0.75rem;
    }
    
    .tech-item {
        padding: 0.625rem 1.25rem;
        font-size: 0.875rem;
    }
}

@media (max-width: 480px) {
    .about {
        padding: 5rem 0.75rem;
    }
    
    .about-header {
        margin-bottom: 2.5rem;
    }
    
    .section-badge {
        padding: 0.4rem 1.25rem;
        font-size: 0.8125rem;
    }
    
    .section-title {
        font-size: clamp(1.75rem, 5vw, 2.5rem);
        margin-bottom: 1rem;
    }
    
    .section-description {
        font-size: clamp(0.9375rem, 2vw, 1.125rem);
    }
    
    .about-grid {
        gap: 1.25rem;
    }
    
    .about-card {
        padding: 1.5rem;
        border-radius: 20px;
    }
    
    .about-card h3 {
        font-size: 1.375rem;
        margin-bottom: 0.875rem;
    }
    
    .about-card p {
        font-size: 0.9375rem;
        line-height: 1.65;
    }
    
    .main-card {
        gap: 1.5rem;
    }
    
    .card-number {
        font-size: 4rem;
    }
    
    .milestones {
        gap: 1.25rem;
        padding-left: 0.75rem;
        margin: 1.25rem 0;
    }
    
    .milestone-dot {
        width: 20px;
        height: 20px;
        border-width: 2.5px;
    }
    
    .milestone::before {
        left: 9.5px;
        top: 24px;
    }
    
    .milestone-content h4 {
        font-size: 1rem;
    }
    
    .milestone-content p {
        font-size: 0.875rem;
    }
    
    .card-tags {
        gap: 0.625rem;
        margin-top: 1.25rem;
    }
    
    .tag {
        padding: 0.4rem 0.875rem;
        font-size: 0.8125rem;
    }
    
    .tech-list {
        gap: 0.625rem;
        margin-top: 1.5rem;
    }
    
    .tech-item {
        padding: 0.5rem 1rem;
        font-size: 0.8125rem;
    }
    
    .main-card-image {
        position: static;
        width: 300px;
        margin: 2rem auto 0;
        display: block;
        opacity: 0.5;
    }
}

@media (max-width: 375px) {
    .about {
        padding: 4rem 0.5rem;
    }
    
    .about-card {
        padding: 1.25rem;
    }
    
    .section-title {
        font-size: 1.5rem;
    }
    
    .about-card h3 {
        font-size: 1.25rem;
    }
    
    .about-card p {
        font-size: 0.875rem;
    }
}