.about-container {
    max-width: 900px;
    margin: 0 auto;
    padding: 2rem 1rem;
    overflow-y: auto;
    max-height: 80vh;
    -ms-overflow-style: none;  /* IE and Edge */
    scrollbar-width: none;  /* Firefox */
}

.about-container::-webkit-scrollbar {
    display: none; /* Chrome, Safari and Opera */
}


.about-intro {
    text-align: center;
    margin-bottom: 4rem;
}

.scroll-down-arrow {
    width: 20px;
    height: 20px;
    border: 2px solid var(--text-color, #fff);
    border-top: 0;
    border-left: 0;
    transform: rotate(45deg);
    margin: 30px auto 0;
    animation: bounce-arrow 2s infinite;
}

@keyframes bounce-arrow {
    0%, 20%, 50%, 80%, 100% {
        transform: translateY(0) rotate(45deg);
    }
    40% {
        transform: translateY(10px) rotate(45deg);
    }
    60% {
        transform: translateY(5px) rotate(45deg);
    }
}


.about-timeline {
    position: relative;
    padding: 2rem 0;
    margin-bottom: 3rem;
}

.about-timeline::before {
    content: '';
    position: absolute;
    left: 20px;
    top: 0;
    bottom: 0;
    width: 2px;
    background-color: rgba(255, 255, 255, 0.15);
    transform: scaleY(0);
    transform-origin: top;
    transition: transform 0.8s ease-out;
}

.about-timeline.is-visible::before {
    transform: scaleY(1);
}

.timeline-item {
    position: relative;
    padding-left: 60px;
    margin-bottom: 40px;
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.timeline-item.is-visible {
    opacity: 1;
    transform: translateY(0);
}


.timeline-item:last-child {
    margin-bottom: 0;
}

.timeline-dot {
    position: absolute;
    left: 12px;
    top: 5px;
    width: 18px;
    height: 18px;
    background-color: var(--primary-color, #007bff);
    border-radius: 50%;
    border: 3px solid var(--background-color, #121212);
    transform: scale(0);
    transition: transform 0.5s 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.timeline-item.is-visible .timeline-dot {
    transform: scale(1);
    box-shadow: 0 0 15px 4px rgba(var(--primary-color-rgb, 0, 123, 255), 0.5);
    animation: pulse-glow 2.5s infinite ease-in-out;
}

@keyframes pulse-glow {
    0% {
        box-shadow: 0 0 15px 4px rgba(var(--primary-color-rgb, 0, 123, 255), 0.5);
    }
    50% {
        box-shadow: 0 0 25px 8px rgba(var(--primary-color-rgb, 0, 123, 255), 0.3);
    }
    100% {
        box-shadow: 0 0 15px 4px rgba(var(--primary-color-rgb, 0, 123, 255), 0.5);
    }
}

.timeline-date {
    font-size: 0.9rem;
    color: var(--text-color-secondary);
    margin-bottom: 0.5rem;
}

.timeline-title {
    font-size: 1.25rem;
    font-weight: 500;
    margin-bottom: 0.75rem;
}

.timeline-desc {
    font-size: 1rem;
    line-height: 1.6;
    color: var(--text-color-secondary);
}

.about-skills {
    margin-bottom: 2rem;
}

.section-subtitle {
    text-align: center;
    margin-bottom: 3rem;
    font-size: 1.8rem;
    font-weight: 500;
}

.section-subtitle span {
    position: relative;
    display: inline-block;
    padding-bottom: 0.5rem;
}

.section-subtitle span::after {
    content: '';
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    bottom: 0;
    width: 60px;
    height: 2px;
    background-color: var(--primary-color);
}


.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2.5rem;
}

.skill-category h4 {
    font-size: 1.2rem;
    font-weight: 500;
    margin-bottom: 1.5rem;
    padding-bottom: 0.75rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.skills-list {
    display: flex;
    flex-direction: column;
    gap: 1.5rem; 
}

.skills-list span {
    display: block;
    color: var(--text-color-secondary);
}

.skills-list .skill-item span {
    padding-left: 20px;
    position: relative;
}

.skills-list .skill-item span::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--primary-color);
    opacity: 0.7;
}

.skills-list span a {
    padding-left: 20px;
    position: relative;
}

.skills-list span a::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--primary-color);
    opacity: 0.7;
}

.progress-bar-container {
    width: 100%;
    height: 6px;
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: 3px;
    margin-top: 8px;
    overflow: hidden;
}

.progress-bar {
    width: 0;
    height: 100%;
    background-color: var(--primary-color);
    border-radius: 3px;
    transition: width 1.2s cubic-bezier(0.25, 1, 0.5, 1);
}

.timeline-title a {
    text-decoration: none;
    color: inherit;
    position: relative;
    display: inline-block;
    padding-bottom: 2px;
}

.timeline-title a::after {
    content: '';
    position: absolute;
    width: 0;
    height: 1px;
    display: block;
    margin-top: 0px;
    right: 0;
    background: #fff;
    transition: width .3s ease;
    -webkit-transition: width .3s ease;
}

.timeline-title a.is-visible::after {
    animation: underline-link 1s ease-out forwards;
}

@keyframes underline-link {
    0% {
        width: 0%;
        left: 0;
    }
    50% {
        width: 100%;
        left: 0;
    }
    100% {
        width: 0%;
        left: 100%;
    }
}


.skills-list a {
    text-decoration: none;
    color: inherit;
    position: relative;
    display: inline-block;
    padding-bottom: 2px;
}

.skills-list a::after {
    content: '';
    position: absolute;
    width: 0;
    height: 1px;
    display: block;
    margin-top: 0px;
    right: 0;
    background: #fff;
    transition: width .3s ease;
    -webkit-transition: width .3s ease;
}

.timeline-title a:hover::after,
.skills-list a:hover::after {
    width: 100%;
    left: 0;
    background-color: #fff;
}

.download-cv-btn {
    display: block;
    width: fit-content;
    padding: 12px 24px;
    border: 1px solid #ffffff;
    border-radius: 8px;
    color: #ffffff;
    text-decoration: none;
    margin: 40px auto 0;
    transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
    font-weight: 500;
    letter-spacing: 0.5px;
    background-color: transparent;
    text-align: center;
}

.download-cv-btn:hover {
    background-color: #ffffff;
    color: #1a1a1a;
    transform: translateY(-3px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.2);
}