:root {
    --bg-color: #020617;
    --card-bg: #0f172a;
    --accent-color: #3b82f6;
    --accent-glow: rgba(59, 130, 246, 0.5);
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --border-color: #1e293b;
    --nav-height: 70px;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding-left: 20px;
    padding-right: 20px;
}

section {
    padding: 15px 0;
}

header {
    position: fixed;
    top: 0;
    width: 100%;
    height: var(--nav-height);
    background: rgba(2, 6, 23, 0.8);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 100%;
    margin-top: 15px;
}

.logo {
    font-weight: 800;
    font-size: 1.5rem;
    letter-spacing: -0.02em;
    display: flex;
    align-items: center;
}

.logo .logo-ar {
    color: #ffffff;
}

.logo .logo-chime {
    color: var(--accent-color);
}

.nav-links {
    display: flex;
    gap: 2rem;
    align-items: center;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-secondary);
    font-size: 1.3rem;
    font-weight: 500;
    font-family: 'Inter', sans-serif;
    transition: color 0.3s;
    line-height: 1;
}

.nav-links a:hover {
    color: var(--accent-color);
}

.hero {
    text-align: center;
    padding-top: 150px;
}

.hero-avatar-container {
    display: inline-block;
    padding: 4px;
    background: linear-gradient(45deg, #3b82f6, #8b5cf6);
    border-radius: 50%;
    margin-bottom: 2rem;
}

.hero-avatar-container picture,
.hero-avatar-container img {
    display: block;
    width: 160px;
    height: 160px;
    border-radius: 50%;
    object-fit: cover;
    object-position: center top;
}

.hero h1 {
    font-size: clamp(2.5rem, 8vw, 4.5rem);
    font-weight: 800;
    margin-bottom: 1rem;
    letter-spacing: -0.02em;
}

.hero h1 span {
    color: var(--accent-color);
}

.hero h2 {
    font-size: 1.5rem;
    color: #ffffff;
    font-weight: 600;
    font-style: italic;
    margin-bottom: 2rem;
}

.hero p {
    max-width: 850px;
    margin: 0 auto 2.5rem;
    color: var(--text-secondary);
    font-size: 1.1rem;
    line-height: 1.8;
}

.hero p strong {
    color: var(--text-primary);
    font-weight: 600;
}

.contact-chips {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 12px;
}

.chip {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    padding: 8px 16px;
    border-radius: 50px;
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.85rem;
    color: var(--text-primary);
    text-decoration: none;
    transition: border-color 0.3s;
}

.chip:hover {
    border-color: var(--accent-color);
}

.chip i,
.chip svg {
    color: var(--accent-color);
    width: 16px;
    height: 16px;
    fill: currentColor;
}

.section-title {
    font-size: 2rem;
    margin-bottom: 3rem;
    display: flex;
    align-items: center;
    gap: 15px;
}

.section-title i {
    color: var(--accent-color);
}

.hf-logo {
    width: 32px;
    height: 32px;
    object-fit: contain;
    vertical-align: middle;
}


.carousel-wrapper {
    display: flex;
    align-items: center;
    gap: 16px;
}

.carousel-track-outer {
    overflow: hidden;
    flex: 1;
}

.portfolio-grid {
    display: flex;
    gap: 24px;
    transition: transform 0.4s ease;
}

.portfolio-grid .portfolio-card {
    flex: 0 0 calc((100% - 48px) / 3);
    min-width: 0;
}

.carousel-btn {
    flex-shrink: 0;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    border: 1px solid var(--border-color);
    background: var(--card-bg);
    color: var(--text-primary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
}

.carousel-btn:hover:not(:disabled) {
    background: var(--accent-color);
    border-color: var(--accent-color);
}

.carousel-btn:disabled {
    opacity: 0.3;
    cursor: default;
}

.carousel-btn svg {
    width: 20px;
    height: 20px;
}

.portfolio-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    overflow: hidden;
    transition: all 0.3s;
    display: flex;
    flex-direction: column;
}

.portfolio-card:hover {
    border-color: var(--accent-color);
    transform: translateY(-5px);
}

.portfolio-header {
    padding: 20px 25px 16px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-bottom: 1px solid var(--border-color);
}

.portfolio-header-icon {
    width: 44px;
    height: 44px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.portfolio-header-icon svg {
    width: 22px;
    height: 22px;
}

.portfolio-stat {
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.06em;
    padding: 4px 10px;
    border-radius: 20px;
    text-transform: uppercase;
}

.portfolio-content {
    padding: 20px 25px 25px;
    flex-grow: 1;
}

.portfolio-tag {
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--accent-color);
    font-weight: 800;
    margin-bottom: 10px;
    display: block;
}

.portfolio-card h4 {
    font-size: 1.2rem;
    margin-bottom: 10px;
    color: #fff;
}

.portfolio-card p {
    font-size: 0.88rem;
    color: var(--text-secondary);
    margin-bottom: 0;
    line-height: 1.55;
}

.portfolio-link {
    margin-top: auto;
    padding: 15px 25px;
    background: rgba(59, 130, 246, 0.1);
    border-top: 1px solid var(--border-color);
    color: var(--accent-color);
    text-decoration: none;
    font-weight: 600;
    font-size: 0.85rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    transition: all 0.3s;
}

.portfolio-link:hover {
    background: var(--accent-color);
    color: white;
}

.services-track {
    display: flex;
    gap: 24px;
    transition: transform 0.45s ease;
}

.service-card {
    flex: 0 0 calc((100% - 48px) / 3);
    min-width: 0;
    height: 550px;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    padding: 28px;
    display: flex;
    flex-direction: column;
    gap: 14px;
    transition: border-color 0.3s, transform 0.3s;
    position: relative;
    overflow: hidden;
}

.service-dots {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-top: 24px;
}

.service-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    border: none;
    background: var(--border-color);
    cursor: pointer;
    transition: all 0.3s;
    padding: 0;
}

.service-dot.active {
    width: 24px;
    border-radius: 4px;
}

.service-card::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--service-color, var(--accent-color));
    opacity: 0;
    transition: opacity 0.3s;
}

.service-card:hover::after {
    opacity: 1;
}

.service-card:hover {
    border-color: var(--service-color, var(--accent-color));
    transform: translateY(-5px);
}

.service-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
}

.service-icon-wrap {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.service-icon-wrap svg {
    width: 24px;
    height: 24px;
}

.service-tag {
    font-size: 0.68rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-secondary);
    text-align: right;
    line-height: 1.4;
}

.service-title {
    font-size: 1.1rem;
    font-weight: 700;
    color: #fff;
    line-height: 1.3;
}

.service-desc {
    font-size: 0.88rem;
    line-height: 1.6;
    flex: 1;
}

.service-problem {
    display: block;
    font-weight: 500;
    margin-bottom: 12px;
    padding-bottom: 12px;
    border-bottom: 1px solid #1e293b;
}

.service-solution {
    display: block;
    color: #94a3b8 !important;
}

.service-value {
    padding: 10px 14px;
    border-radius: 10px;
    border-left: 3px solid var(--service-color, var(--accent-color));
    font-size: 0.78rem;
    color: #94a3b8;
    line-height: 1.6;
}

.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 24px;
}

.skill-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    padding: 28px;
    border-radius: 20px;
    transition: border-color 0.3s, transform 0.3s;
    position: relative;
    overflow: hidden;
}

.skill-card::after {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 3px;
    background: var(--skill-color, var(--accent-color));
    opacity: 0;
    transition: opacity 0.3s;
}

.skill-card:hover {
    border-color: color-mix(in srgb, var(--skill-color, var(--accent-color)) 40%, transparent);
    transform: translateY(-4px);
}

.skill-card:hover::after {
    opacity: 1;
}

.skill-card-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 18px;
}

.skill-icon-wrap {
    width: 40px;
    height: 40px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.skill-card h4 {
    font-size: 1rem;
    font-weight: 600;
    margin: 0;
}

.skill-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.skill-tag {
    border: 1px solid;
    padding: 4px 12px;
    border-radius: 6px;
    font-size: 0.75rem;
    font-weight: 500;
}

.tag {
    background: #020617;
    border: 1px solid var(--border-color);
    padding: 4px 12px;
    border-radius: 6px;
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.timeline {
    max-width: 900px;
    margin: 0 auto;
}

.exp-item {
    position: relative;
    padding-left: 40px;
    border-left: 2px solid var(--border-color);
    padding-bottom: 60px;
}

.exp-item::before {
    content: '';
    position: absolute;
    left: -9px;
    top: 0;
    width: 16px;
    height: 16px;
    background: var(--accent-color);
    border-radius: 50%;
    box-shadow: 0 0 10px var(--accent-glow);
}

.exp-item:nth-child(even)::before {
    background: #fff;
    box-shadow: 0 0 10px rgba(255, 255, 255, 0.4);
}

.exp-date {
    font-family: monospace;
    color: var(--accent-color);
    font-size: 0.9rem;
    margin-bottom: 0.5rem;
    display: block;
}

.exp-item h4 {
    font-size: 1.4rem;
    margin-bottom: 0.2rem;
    color: #fff;
}

.exp-company {
    color: #60a5fa;
    font-weight: 600;
    margin-bottom: 1rem;
    display: block;
}

.exp-tasks {
    list-style: none;
    margin-top: 1rem;
}

.exp-tasks li {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 8px;
    display: flex;
    gap: 10px;
    line-height: 1.4;
}

.exp-tasks li::before {
    content: '→';
    color: var(--accent-color);
    font-weight: bold;
    flex-shrink: 0;
}

.exp-item-hidden {
    display: none;
}

.exp-item-hidden.exp-item-visible {
    display: block;
}

.exp-show-more {
    margin-top: 8px;
    background: none;
    border: 1px solid var(--border-color);
    color: var(--accent-color);
    font-size: 0.85rem;
    font-weight: 600;
    padding: 8px 20px;
    border-radius: 20px;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    transition: all 0.2s;
}

.exp-show-more:hover {
    background: var(--accent-color);
    color: #fff;
    border-color: var(--accent-color);
}

.cert-grid {
    display: flex;
    gap: 20px;
    transition: transform 0.4s ease;
}

.cert-grid .cert-item {
    flex: 0 0 calc((100% - 40px) / 3);
    min-width: 0;
}

.cert-item {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    transition: all 0.3s;
}

.cert-item:hover {
    border-color: var(--accent-color);
    transform: translateY(-4px);
}

.cert-visual {
    padding: 28px 20px 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #0a1628;
    min-height: 130px;
}

.cert-badge-img {
    max-width: 100px;
    max-height: 100px;
    object-fit: contain;
    filter: brightness(0) invert(1);
    opacity: 0.9;
}

.cert-badge-img.badge-color {
    filter: none;
    opacity: 1;
    max-width: 110px;
    max-height: 110px;
}

.cert-visual svg {
    color: var(--accent-color);
    width: 48px;
    height: 48px;
}

.cert-body {
    padding: 16px 18px;
    flex: 1;
}

.cert-code {
    font-size: 0.68rem;
    color: var(--accent-color);
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    display: block;
    margin-bottom: 6px;
}

.cert-name {
    font-size: 0.9rem;
    color: var(--text-primary);
    font-weight: 500;
    line-height: 1.4;
    margin-bottom: 6px;
}

.cert-issuer {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.cert-link {
    padding: 11px 16px;
    background: rgba(59, 130, 246, 0.08);
    border-top: 1px solid var(--border-color);
    color: var(--accent-color);
    text-decoration: none;
    font-weight: 600;
    font-size: 0.8rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    transition: all 0.3s;
}

.cert-link:hover {
    background: var(--accent-color);
    color: white;
}

footer {
    padding: 60px 0;
    border-top: 1px solid var(--border-color);
    text-align: center;
}

.social-links {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-bottom: 2rem;
}

.social-links a {
    background: var(--card-bg);
    color: var(--text-primary);
    padding: 12px;
    border-radius: 50%;
    transition: all 0.3s;
    display: flex;
    align-items: center;
    justify-content: center;
}

.social-links a:hover {
    background: var(--accent-color);
    transform: translateY(-3px);
}

.social-links svg {
    width: 20px;
    height: 20px;
    fill: currentColor;
}

.copyright {
    color: var(--text-secondary);
    font-size: 0.8rem;
}

.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.8s ease-out;
}

.reveal.active {
    opacity: 1;
    transform: translateY(0);
}

.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
}

.menu-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: all 0.3s;
}

.menu-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.menu-toggle.open span:nth-child(2) { opacity: 0; }
.menu-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

@media (max-width: 768px) {
    .menu-toggle { display: flex; }

    .nav-links {
        display: none;
        position: fixed;
        top: var(--nav-height);
        left: 0;
        right: 0;
        background: rgba(2, 6, 23, 0.97);
        backdrop-filter: blur(10px);
        flex-direction: column;
        gap: 0;
        border-bottom: 1px solid var(--border-color);
        z-index: 999;
    }

    .nav-links.open { display: flex; }

    .nav-links a {
        padding: 16px 24px;
        border-bottom: 1px solid var(--border-color);
        font-size: 1rem;
    }

    .hero h1 { font-size: 2.8rem; }
    .portfolio-grid .portfolio-card { flex: 0 0 calc(100% - 0px); }
    .carousel-btn { width: 36px; height: 36px; }
    .service-card { flex: 0 0 calc(100% - 0px); height: auto; }
}