:root {
    --bg: #040806;
    --panel: rgba(11, 17, 13, 0.96);
    --panel-strong: #101712;
    --panel-soft: #141b16;
    --border: rgba(255, 255, 255, 0.07);
    --border-strong: rgba(255, 255, 255, 0.12);
    --text: #f4f6f2;
    --muted: #8c958d;
    --accent: #67e696;
    --accent-soft: rgba(103, 230, 150, 0.14);
    --shadow: 0 24px 56px rgba(0, 0, 0, 0.28);
    --ease-premium: cubic-bezier(0.22, 1, 0.36, 1);
    --space-1: 4px;
    --space-2: 8px;
    --space-3: 12px;
    --space-4: 16px;
    --space-5: 20px;
    --space-6: 24px;
    --space-7: 32px;
    --space-8: 40px;
    --space-9: 56px;
    --space-10: 72px;
    --section-space: var(--space-10);
    --section-space-mobile: var(--space-9);
    --card-pad: var(--space-7);
    --card-pad-mobile: var(--space-6);
    --grid-gap: var(--space-6);
}

*,
*::before,
*::after {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    min-height: 100vh;
    margin: 0;
    background:
        linear-gradient(rgba(103, 230, 150, 0.035) 1px, transparent 1px),
        linear-gradient(90deg, rgba(103, 230, 150, 0.035) 1px, transparent 1px),
        radial-gradient(circle at top, rgba(103, 230, 150, 0.06), transparent 28%),
        var(--bg);
    background-size: 56px 56px, 56px 56px, auto, auto;
    color: var(--text);
    font-family: "Open Sans", Arial, sans-serif;
    line-height: 1.6;
    overflow-x: hidden;
    padding: var(--space-2);
}

a {
    color: inherit;
    text-decoration: none;
}

img,
video,
iframe {
    display: block;
    max-width: 100%;
}

.header-section,
main,
.footer {
    width: min(100%, 1280px);
    margin-inline: auto;
    background: rgba(4, 8, 6, 0.82);
}

.header-section {
    position: sticky;
    top: var(--space-2);
    z-index: 100;
    border: 1px solid var(--border);
    border-bottom: 0;
    border-radius: 18px 18px 0 0;
    background: rgba(4, 8, 6, 0.94);
    backdrop-filter: blur(10px);
    transition: background-color 0.5s var(--ease-premium), border-color 0.5s var(--ease-premium), box-shadow 0.5s var(--ease-premium);
}

.header-section.is-scrolled {
    background: rgba(7, 12, 9, 0.97);
    border-color: var(--border-strong);
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.2);
}

.header-container {
    width: min(100%, 1120px);
    min-height: 72px;
    margin: 0 auto;
    padding: 0 var(--space-6);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-6);
}

.logo {
    display: inline-flex;
    gap: 6px;
    align-items: baseline;
    white-space: nowrap;
    color: var(--text);
    font-size: 1.05rem;
    font-weight: 700;
}

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

.main-nav ul {
    display: flex;
    align-items: center;
    gap: var(--space-7);
    list-style: none;
    margin: 0;
    padding: 0;
}

.nav-link {
    color: rgba(244, 246, 242, 0.82);
    font-size: 0.98rem;
    font-weight: 600;
    transition: color 0.3s var(--ease-premium);
}

.nav-link:hover {
    color: var(--text);
}

.mobile-menu-toggle {
    display: none;
    width: 42px;
    height: 42px;
    border: 1px solid var(--border);
    border-radius: 8px;
    background: transparent;
    color: inherit;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    gap: 4px;
    cursor: pointer;
}

.mobile-menu-toggle span {
    width: 18px;
    height: 2px;
    background: var(--text);
}

.mobile-menu {
    display: none;
    border-top: 1px solid var(--border);
    background: rgba(7, 12, 9, 0.98);
}

.mobile-menu.active {
    display: block;
}

.mobile-menu ul {
    list-style: none;
    margin: 0;
    padding: var(--space-3) var(--space-5) var(--space-5);
}

.mobile-menu a {
    display: block;
    padding: var(--space-3) 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    color: rgba(244, 246, 242, 0.88);
    font-weight: 600;
    transition: color 0.3s var(--ease-premium), transform 0.3s var(--ease-premium);
}

.mobile-menu li:last-child a {
    border-bottom: 0;
}

.mobile-menu a:hover {
    color: var(--text);
    transform: translateX(4px);
}

main {
    border-left: 1px solid var(--border);
    border-right: 1px solid var(--border);
}

.main-container,
.main-content,
.content-wrapper,
.container {
    width: min(100%, 1120px);
    margin: 0 auto;
}

.main-container,
.main-content,
.content-wrapper {
    padding: 0 var(--space-6);
}

section {
    padding-block: var(--section-space);
}

.project-title-section,
.about-section,
.education-section,
.skills-section,
.cv-container {
    padding-top: var(--section-space);
}

.section-header,
.project-title-section .container,
.about-section .container,
.education-section .container,
.skills-section .container,
.cv-container {
    position: relative;
}

.project-title-section .container {
    padding: var(--card-pad);
    border: 1px solid var(--border);
    border-radius: 24px;
    background: linear-gradient(180deg, rgba(19, 26, 21, 0.9), rgba(9, 14, 11, 0.92));
    box-shadow: 0 18px 46px rgba(0, 0, 0, 0.18);
}

.project-title-section .container::before,
.about-section .container::before,
.education-section .container::before,
.skills-section .container::before,
.cv-container::before {
    display: inline-flex;
    align-items: center;
    min-height: 40px;
    padding: 0 18px;
    margin-bottom: var(--space-6);
    border: 1px solid rgba(255, 255, 255, 0.18);
    border-radius: 999px;
    color: rgba(244, 246, 242, 0.82);
    font-size: 0.82rem;
    font-weight: 700;
    letter-spacing: 0.12em;
}

.project-title-section .container::before {
    content: "PORTFOLIO";
}

.about-section .container::before {
    content: "BACKGROUND";
}

.education-section .container::before {
    content: "JOURNEY";
}

.skills-section .container::before {
    content: "TOOLKIT";
}

.cv-container::before {
    content: "CURRICULUM VITAE";
}

h1,
h2,
h3,
.project-title,
.about-title,
.education-title,
.skills-title,
.page-title {
    margin: 0;
    color: var(--text);
    font-family: "Open Sans", Arial, sans-serif;
    font-weight: 700;
    line-height: 1.08;
}

.project-title,
.about-title,
.education-title,
.skills-title,
.page-title {
    max-width: 12ch;
    font-size: clamp(2.9rem, 5vw, 4.8rem);
    letter-spacing: -0.03em;
}

.section-subtitle,
.about-subtitle,
.education-subtitle,
.skills-subtitle,
.project-intro,
.intro-text p,
.content-text,
.feature-text p,
.takeaways-content p,
.future-content p,
.section-content p,
.cv-container p {
    color: var(--muted);
    font-size: 1.02rem;
}

.section-subtitle,
.about-subtitle,
.education-subtitle,
.skills-subtitle,
.project-intro {
    max-width: 680px;
    margin-top: var(--space-4);
}

.project-links,
.download-links,
.store-links,
.social-links,
.footer-social-links {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-3);
}

.project-links {
    margin-top: var(--space-6);
}

.project-links p {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--space-3);
    margin: 0;
}

.link-label {
    color: var(--accent);
    font-weight: 700;
}

.game-link,
.download-link,
.email-link,
.cv-button,
.store-link,
.social-link,
.project-links a,
.download-links a {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 48px;
    padding: 0 22px;
    border: 1px solid var(--border);
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.02);
    color: var(--text);
    font-weight: 600;
    transition: transform 0.35s var(--ease-premium), border-color 0.35s var(--ease-premium), background-color 0.35s var(--ease-premium), box-shadow 0.35s var(--ease-premium);
}

.game-link:hover,
.download-link:hover,
.email-link:hover,
.cv-button:hover,
.store-link:hover,
.social-link:hover,
.project-links a:hover,
.download-links a:hover {
    transform: translateY(-2px);
    border-color: rgba(103, 230, 150, 0.4);
    background: rgba(103, 230, 150, 0.08);
    box-shadow: 0 16px 34px rgba(0, 0, 0, 0.22);
}

.video-container,
.cv-iframe,
.feature-image img,
.feature-video video,
.video-item video,
.video-item img,
.carousel-wrapper,
.gif-section img,
.image-grid img,
.profile-image,
.feature-image-container {
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 18px;
    overflow: hidden;
    background: rgba(255, 255, 255, 0.02);
    box-shadow: var(--shadow);
}

.feature-section,
.technical-section,
.timeline-section,
.learnings-section,
.future-section,
.takeaways-section,
.section-content,
.education-card,
.skills-card,
.contact-card,
.content-column,
.text-section,
.content-grid > .content-text,
.content-grid > .career-text,
.cv-container,
.about-section .container,
.education-item {
    border: 1px solid var(--border);
    border-radius: 24px;
    background: linear-gradient(180deg, rgba(19, 26, 21, 0.9), rgba(9, 14, 11, 0.92));
    box-shadow: 0 18px 46px rgba(0, 0, 0, 0.18);
}

.about-section .container,
.education-section .container,
.skills-section .container,
.cv-container {
    padding: var(--card-pad);
}

.feature-section,
.technical-section,
.timeline-section,
.learnings-section,
.future-section,
.takeaways-section,
.section-content {
    padding: var(--card-pad);
}

.feature-section + .feature-section,
.technical-section + .technical-section,
.timeline-section + .timeline-section,
.learnings-section + .learnings-section,
.future-section + .future-section,
.takeaways-section + .takeaways-section {
    margin-top: var(--space-6);
}

.feature-grid,
.content-grid {
    display: grid;
    gap: var(--grid-gap);
    align-items: start;
}

.feature-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
}

.content-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
}

.feature-videos,
.content-videos,
.skills-container,
.education-grid {
    display: grid;
    gap: var(--space-4);
}

.feature-videos,
.content-videos,
.education-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
}

.skills-container {
    grid-template-columns: repeat(3, minmax(0, 1fr));
}

.store-link,
.social-link,
.footer-social-links a,
.tag,
.tech-tag,
.skill-tag {
    min-height: 40px;
    padding: 0 16px;
    border-radius: 999px;
    border: 1px solid rgba(255, 255, 255, 0.12);
    background: rgba(255, 255, 255, 0.03);
    color: rgba(244, 246, 242, 0.86);
    font-size: 0.92rem;
    font-weight: 600;
    transition: transform 0.35s var(--ease-premium), border-color 0.35s var(--ease-premium), background-color 0.35s var(--ease-premium);
}

.store-link:hover,
.social-link:hover,
.footer-social-links a:hover,
.tag:hover,
.tech-tag:hover,
.skill-tag:hover {
    transform: translateY(-2px);
    border-color: rgba(103, 230, 150, 0.35);
    background: rgba(103, 230, 150, 0.08);
}

.section-content h2,
.feature-text h2,
.feature-text h3,
.content-text h2,
.content-text h3,
.section-title,
.section-heading,
.subsection-heading,
.timeline-title,
.learnings-title,
.future-title,
.takeaways-title {
    font-size: clamp(1.7rem, 2.6vw, 2.45rem);
    margin-bottom: var(--space-3);
}

.about-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: var(--space-6);
    margin-bottom: var(--space-6);
}

.intro-list,
.section-content ul,
.feature-text ul,
.content-text ul,
.career-text ul,
.text-section ul {
    margin: var(--space-4) 0 0;
    padding-left: 20px;
    color: var(--muted);
}

.intro-list li,
.section-content li,
.feature-text li,
.content-text li,
.career-text li,
.text-section li {
    margin-top: var(--space-2);
}

.story-text,
.intro-text,
.career-text {
    color: var(--muted);
}

.skills-container {
    margin-top: var(--space-6);
}

.skill-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 46px;
    padding: 0 18px;
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.03);
    color: rgba(244, 246, 242, 0.86);
    font-weight: 600;
    transition: transform 0.35s var(--ease-premium), border-color 0.35s var(--ease-premium), background-color 0.35s var(--ease-premium);
}

.skill-button:hover {
    transform: translateY(-2px);
    border-color: rgba(103, 230, 150, 0.35);
    background: rgba(103, 230, 150, 0.08);
}

.education-item {
    padding: var(--space-6);
}

.education-institution,
.education-period,
.education-location,
.education-degree {
    margin: 0;
}

.education-period,
.education-location,
.education-degree {
    color: var(--muted);
}

.education-item > * + * {
    margin-top: var(--space-2);
}

.learnings-list,
.takeaways-list,
.technical-list {
    list-style: none;
    margin: 0;
    padding: 0;
    display: grid;
    gap: var(--space-3);
}

.learnings-item,
.takeaways-item,
.technical-list li {
    padding: var(--space-4) var(--space-5);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 18px;
    background: rgba(255, 255, 255, 0.03);
}

.timeline-list {
    display: grid;
    gap: var(--space-4);
}

.timeline-item {
    padding-left: 24px;
    border-left: 2px solid rgba(103, 230, 150, 0.32);
}

.footer {
    border: 1px solid var(--border);
    border-top: 0;
    border-radius: 0 0 18px 18px;
    padding: var(--space-6);
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    align-items: center;
    gap: var(--space-6);
}

.footer-content {
    width: min(100%, 1120px);
    margin: 0 auto;
    padding: var(--space-6);
}

.footer-brand {
    display: inline-flex;
    gap: 6px;
    align-items: baseline;
    font-size: 1.45rem;
    font-weight: 700;
}

.footer-copy {
    margin: 0;
    color: rgba(244, 246, 242, 0.48);
    text-align: center;
    font-size: 0.98rem;
}

.footer-nav {
    display: flex;
    justify-content: flex-end;
    gap: var(--space-6);
}

.footer-nav a {
    color: rgba(244, 246, 242, 0.62);
    font-size: 0.98rem;
    font-weight: 600;
    transition: color 0.3s var(--ease-premium);
}

.footer-nav a:hover {
    color: var(--text);
}

.footer-main {
    display: grid;
    gap: var(--space-6);
    align-items: center;
}

.footer-main .logo {
    font-size: 1rem;
}

.footer-links ul {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-5);
    list-style: none;
    margin: 0;
    padding: 0;
}

.footer-links a {
    color: rgba(244, 246, 242, 0.74);
    font-weight: 600;
    transition: color 0.3s var(--ease-premium);
}

.footer-links a:hover {
    color: var(--text);
}

.reveal {
    opacity: 0;
    transform: translateY(28px);
    transition: opacity 0.85s var(--ease-premium), transform 0.85s var(--ease-premium);
    will-change: opacity, transform;
}

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

.feature-section,
.technical-section,
.timeline-section,
.learnings-section,
.future-section,
.takeaways-section,
.section-content,
.education-item,
.content-column,
.store-link,
.social-link,
.footer-social-links a,
.carousel-wrapper,
.cv-iframe,
.video-container,
.feature-image img,
.feature-video video,
.video-item video,
.video-item img {
    transition: transform 0.35s var(--ease-premium), border-color 0.35s var(--ease-premium), box-shadow 0.35s var(--ease-premium), background-color 0.35s var(--ease-premium);
}

.feature-section:hover,
.technical-section:hover,
.timeline-section:hover,
.learnings-section:hover,
.future-section:hover,
.takeaways-section:hover,
.section-content:hover,
.education-item:hover,
.content-column:hover,
.carousel-wrapper:hover,
.cv-iframe:hover,
.video-container:hover,
.feature-image img:hover,
.feature-video video:hover,
.video-item video:hover,
.video-item img:hover {
    transform: translateY(-4px);
    border-color: rgba(103, 230, 150, 0.18);
    box-shadow: 0 22px 44px rgba(0, 0, 0, 0.24);
}

.footer-social-links {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-3);
    margin: var(--space-5) 0;
}

.footer-text,
.footer-copyright,
.footer-description,
.content-text p,
.feature-text p,
.section-content p,
.timeline-item p,
.timeline-item span,
.timeline-item li,
.store-description,
.social-description {
    color: var(--muted);
}

@media (max-width: 960px) {
    .main-nav {
        display: none;
    }

    .mobile-menu-toggle {
        display: inline-flex;
    }

    .feature-grid,
    .content-grid,
    .feature-videos,
    .content-videos,
    .education-grid,
    .skills-container,
    .footer-main {
        grid-template-columns: 1fr;
    }

    .footer {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .footer-brand,
    .footer-nav {
        justify-content: center;
    }

    .project-title,
    .about-title,
    .education-title,
    .skills-title,
    .page-title {
        max-width: none;
    }
}

@media (max-width: 720px) {
    body {
        padding: 0;
    }

    .header-section {
        top: 0;
        border-radius: 0;
    }

    main,
    .footer {
        border-left: 0;
        border-right: 0;
    }

    .footer {
        border-radius: 0;
    }

    .header-container,
    .main-container,
    .main-content,
    .content-wrapper,
    .footer-content {
        padding-inline: 20px;
    }

    section {
        padding-block: var(--section-space-mobile);
    }

    .about-section .container,
    .education-section .container,
    .skills-section .container,
    .cv-container,
    .project-title-section .container,
    .feature-section,
    .technical-section,
    .timeline-section,
    .learnings-section,
    .future-section,
    .takeaways-section,
    .section-content {
        padding: var(--card-pad-mobile);
        border-radius: 20px;
    }

    .project-links,
    .download-links,
    .store-links,
    .social-links {
        flex-direction: column;
    }

    .project-links p,
    .about-header {
        flex-direction: column;
        align-items: flex-start;
    }

    .game-link,
    .download-link,
    .email-link,
    .cv-button,
    .store-link,
    .social-link {
        width: 100%;
    }
}

@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }

    *,
    *::before,
    *::after {
        animation: none !important;
        transition-duration: 0.01ms !important;
        transition-delay: 0ms !important;
        scroll-behavior: auto !important;
    }

    .reveal {
        opacity: 1 !important;
        transform: none !important;
    }
}