:root {
    --background: #050b18;
    --background-soft: #081329;
    --surface: #0c1a35;
    --surface-light: #112344;
    --border: rgba(148, 178, 230, 0.16);

    --primary: #2563eb;
    --primary-light: #60a5fa;
    --primary-dark: #143b8f;

    --text: #f4f7ff;
    --text-soft: #c0cbe0;
    --text-muted: #8493ad;

    --success: #49d39e;

    --shadow: 0 24px 60px rgba(0, 0, 0, 0.35);
    --radius-large: 28px;
    --radius-medium: 18px;
    --radius-small: 12px;

    --container: 1180px;
    --transition: 220ms ease;
}

/* RESET */

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: 90px;
}

body {
    min-height: 100vh;
    overflow-x: hidden;
    background:
        radial-gradient(
            circle at 15% 5%,
            rgba(37, 99, 235, 0.18),
            transparent 35%
        ),
        var(--background);
    color: var(--text);
    font-family:
        Inter,
        ui-sans-serif,
        system-ui,
        -apple-system,
        BlinkMacSystemFont,
        "Segoe UI",
        sans-serif;
    line-height: 1.7;
}

body.menu-open {
    overflow: hidden;
}

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

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

button,
input,
textarea {
    font: inherit;
}

ul {
    list-style: none;
}

/* SHARED */

.container {
    width: min(calc(100% - 40px), var(--container));
    margin-inline: auto;
}

.section {
    padding: 112px 0;
}

.section-alt {
    background:
        linear-gradient(
            180deg,
            rgba(8, 19, 41, 0.78),
            rgba(5, 11, 24, 0.92)
        );
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
}

.section-grid {
    display: grid;
    grid-template-columns: 0.9fr 1.1fr;
    gap: 80px;
    align-items: start;
}

.section-heading {
    max-width: 700px;
    margin-bottom: 54px;
}

.section-heading.centered {
    margin-inline: auto;
    text-align: center;
}

.section-heading h2 {
    margin-top: 12px;
    font-size: clamp(2.15rem, 5vw, 3.7rem);
    line-height: 1.08;
    letter-spacing: -0.045em;
}

.section-heading > p:last-child {
    margin-top: 20px;
    color: var(--text-soft);
    font-size: 1.06rem;
}

.eyebrow {
    color: var(--primary-light);
    font-size: 0.78rem;
    font-weight: 800;
    letter-spacing: 0.18em;
    text-transform: uppercase;
}

.button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 50px;
    padding: 0 24px;
    border: 1px solid transparent;
    border-radius: 999px;
    font-weight: 750;
    transition:
        transform var(--transition),
        background var(--transition),
        border-color var(--transition),
        color var(--transition);
}

.button:hover,
.button:focus-visible {
    transform: translateY(-3px);
}

.button-primary {
    background: linear-gradient(135deg, var(--primary), #1648b7);
    box-shadow: 0 16px 35px rgba(37, 99, 235, 0.27);
    color: white;
}

.button-primary:hover {
    background: linear-gradient(135deg, #3474f3, var(--primary));
}

.button-secondary {
    border-color: rgba(96, 165, 250, 0.4);
    background: rgba(96, 165, 250, 0.07);
    color: var(--primary-light);
}

.button-secondary:hover {
    border-color: var(--primary-light);
    background: rgba(96, 165, 250, 0.14);
}

.text-link {
    color: var(--primary-light);
    font-weight: 700;
}

.text-link:hover {
    text-decoration: underline;
}

/* HEADER */

.site-header {
    position: fixed;
    z-index: 1000;
    top: 0;
    right: 0;
    left: 0;
    border-bottom: 1px solid transparent;
    background: rgba(5, 11, 24, 0.72);
    backdrop-filter: blur(18px);
    transition:
        background var(--transition),
        border-color var(--transition);
}

.site-header.scrolled {
    border-color: var(--border);
    background: rgba(5, 11, 24, 0.94);
}

.navbar {
    display: flex;
    min-height: 76px;
    align-items: center;
    justify-content: space-between;
}

.logo {
    font-size: 1.18rem;
    font-weight: 900;
    letter-spacing: -0.04em;
}

.logo span {
    color: var(--primary-light);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 28px;
}

.nav-links a {
    color: var(--text-soft);
    font-size: 0.94rem;
    font-weight: 650;
    transition: color var(--transition);
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--primary-light);
}

.nav-links .nav-contact {
    padding: 10px 18px;
    border: 1px solid rgba(96, 165, 250, 0.32);
    border-radius: 999px;
    color: var(--text);
}

.menu-toggle {
    display: none;
    width: 44px;
    height: 44px;
    cursor: pointer;
    border: 0;
    background: transparent;
}

.menu-toggle span {
    display: block;
    width: 23px;
    height: 2px;
    margin: 5px auto;
    border-radius: 20px;
    background: var(--text);
    transition: transform var(--transition);
}

/* HERO */

.hero {
    display: flex;
    min-height: 100vh;
    align-items: center;
    padding-top: 150px;
}

.hero-grid {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 80px;
    align-items: center;
}

.hero-content h1 {
    max-width: 800px;
    margin-top: 18px;
    font-size: clamp(3.2rem, 7vw, 6rem);
    line-height: 0.99;
    letter-spacing: -0.065em;
}

.hero-content h1 span {
    display: block;
    color: var(--primary-light);
}

.hero-description {
    max-width: 720px;
    margin-top: 30px;
    color: var(--text-soft);
    font-size: 1.12rem;
}

.hero-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 30px;
}

.hero-tags span,
.project-tags span,
.project-results span,
.certification-list span,
.tool-strip span {
    border: 1px solid var(--border);
    border-radius: 999px;
    background: rgba(96, 165, 250, 0.06);
    color: var(--text-soft);
    font-size: 0.82rem;
    font-weight: 700;
}

.hero-tags span {
    padding: 7px 13px;
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
    margin-top: 38px;
}

.hero-links {
    display: flex;
    flex-wrap: wrap;
    gap: 24px;
    margin-top: 28px;
}

.hero-links a {
    color: var(--text-muted);
    font-size: 0.92rem;
    font-weight: 700;
    transition: color var(--transition);
}

.hero-links a:hover {
    color: var(--primary-light);
}

.hero-visual {
    position: relative;
}

.photo-frame {
    position: relative;
    overflow: hidden;
    aspect-ratio: 0.88;
    max-width: 430px;
    margin-inline: auto;
    border: 1px solid rgba(96, 165, 250, 0.32);
    border-radius: var(--radius-large);
    background:
        linear-gradient(
            145deg,
            rgba(37, 99, 235, 0.3),
            rgba(8, 19, 41, 0.8)
        );
    box-shadow: var(--shadow);
}

.photo-frame::before {
    position: absolute;
    z-index: 2;
    inset: 0;
    background:
        linear-gradient(
            180deg,
            transparent 50%,
            rgba(5, 11, 24, 0.42)
        );
    content: "";
    pointer-events: none;
}

.photo-frame img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.availability-card {
    position: absolute;
    right: -24px;
    bottom: 36px;
    display: flex;
    max-width: 330px;
    align-items: flex-start;
    gap: 12px;
    padding: 16px 18px;
    border: 1px solid var(--border);
    border-radius: var(--radius-medium);
    background: rgba(8, 19, 41, 0.95);
    box-shadow: var(--shadow);
}

.availability-dot {
    flex: 0 0 10px;
    width: 10px;
    height: 10px;
    margin-top: 7px;
    border-radius: 50%;
    background: var(--success);
    box-shadow: 0 0 18px rgba(73, 211, 158, 0.7);
}

.availability-card strong {
    font-size: 0.93rem;
}

.availability-card p {
    margin-top: 2px;
    color: var(--text-muted);
    font-size: 0.78rem;
    line-height: 1.5;
}

/* ABOUT */

.about-content > p {
    margin-bottom: 22px;
    color: var(--text-soft);
    font-size: 1.08rem;
}

.metrics {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
    margin-top: 38px;
}

.metric {
    padding: 24px;
    border: 1px solid var(--border);
    border-radius: var(--radius-medium);
    background: rgba(12, 26, 53, 0.6);
}

.metric strong {
    display: block;
    color: var(--primary-light);
    font-size: 2.1rem;
    line-height: 1;
}

.metric span {
    display: block;
    margin-top: 10px;
    color: var(--text-muted);
    font-size: 0.88rem;
}

/* SKILLS */

.skills-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
}

.skill-card {
    position: relative;
    overflow: hidden;
    padding: 34px;
    border: 1px solid var(--border);
    border-radius: var(--radius-large);
    background:
        linear-gradient(
            145deg,
            rgba(17, 35, 68, 0.78),
            rgba(8, 19, 41, 0.72)
        );
    transition:
        transform var(--transition),
        border-color var(--transition);
}

.skill-card:hover {
    transform: translateY(-5px);
    border-color: rgba(96, 165, 250, 0.42);
}

.skill-number {
    color: var(--primary-light);
    font-size: 0.76rem;
    font-weight: 900;
    letter-spacing: 0.16em;
}

.skill-card h3 {
    margin-top: 18px;
    font-size: 1.45rem;
}

.skill-card > p {
    margin-top: 12px;
    color: var(--text-soft);
}

.skill-card ul {
    margin-top: 24px;
}

.skill-card li {
    position: relative;
    margin-top: 10px;
    padding-left: 18px;
    color: var(--text-muted);
    font-size: 0.92rem;
}

.skill-card li::before {
    position: absolute;
    top: 0.72em;
    left: 0;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--primary-light);
    content: "";
    transform: translateY(-50%);
}

.tool-strip,
.certification-list {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 10px;
    margin-top: 46px;
}

.tool-strip span,
.certification-list span {
    padding: 9px 14px;
}

/* PROJECTS */

.projects-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 24px;
}

.project-card {
    overflow: hidden;
    border: 1px solid var(--border);
    border-radius: var(--radius-large);
    background: rgba(12, 26, 53, 0.65);
    box-shadow: 0 18px 45px rgba(0, 0, 0, 0.18);
    transition:
        transform var(--transition),
        border-color var(--transition);
}

.project-card:hover {
    transform: translateY(-7px);
    border-color: rgba(96, 165, 250, 0.42);
}

.featured-project {
    grid-column: 1 / -1;
    display: grid;
    grid-template-columns: 0.95fr 1.05fr;
}

.project-image {
    overflow: hidden;
    aspect-ratio: 16 / 10;
    min-height: 0;
    background: #eaf1fb;
}

.featured-project .project-image {
    min-height: 100%;
    aspect-ratio: auto;
}

.project-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
    transition: transform 500ms ease;
}

.project-card:hover .project-image img {
    transform: scale(1.035);
}

.project-content {
    padding: 32px;
}

.project-topline {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
    color: var(--primary-light);
    font-size: 0.74rem;
    font-weight: 800;
    letter-spacing: 0.09em;
    text-transform: uppercase;
}

.project-topline strong {
    padding: 6px 9px;
    border-radius: 999px;
    background: rgba(37, 99, 235, 0.16);
}

.project-content h3 {
    margin-top: 18px;
    font-size: 1.65rem;
}

.project-content > p {
    margin-top: 12px;
    color: var(--text-soft);
}

.project-results,
.project-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 22px;
}

.project-results span {
    padding: 7px 10px;
    background: rgba(73, 211, 158, 0.07);
    color: #9ce8ca;
}

.project-tags span {
    padding: 7px 10px;
}

.project-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    margin-top: 27px;
    color: var(--primary-light);
    font-weight: 800;
}

.project-link span {
    transition: transform var(--transition);
}

.project-link:hover span {
    transform: translateX(5px);
}

/* EXPERIENCE */

.timeline {
    position: relative;
    max-width: 960px;
}

.timeline::before {
    position: absolute;
    top: 8px;
    bottom: 8px;
    left: 130px;
    width: 1px;
    background: var(--border);
    content: "";
}

.timeline-item {
    display: grid;
    grid-template-columns: 105px 1fr;
    gap: 50px;
    margin-bottom: 28px;
}

.timeline-date {
    padding-top: 5px;
    color: var(--primary-light);
    font-size: 0.85rem;
    font-weight: 800;
}

.timeline-content {
    position: relative;
    padding: 30px;
    border: 1px solid var(--border);
    border-radius: var(--radius-medium);
    background: rgba(12, 26, 53, 0.55);
}

.timeline-content::before {
    position: absolute;
    top: 35px;
    left: -31px;
    width: 10px;
    height: 10px;
    border: 4px solid var(--background);
    border-radius: 50%;
    background: var(--primary-light);
    content: "";
}

.timeline-content h3 {
    font-size: 1.3rem;
}

.timeline-company {
    margin-top: 4px;
    color: var(--primary-light);
    font-size: 0.9rem;
    font-weight: 700;
}

.timeline-content ul {
    margin-top: 18px;
}

.timeline-content li {
    position: relative;
    margin-top: 10px;
    padding-left: 18px;
    color: var(--text-soft);
}

.timeline-content li::before {
    position: absolute;
    top: 0.7em;
    left: 0;
    width: 5px;
    height: 5px;
    border-radius: 50%;
    background: var(--primary-light);
    content: "";
}

/* EDUCATION */

.education-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 18px;
}

.education-card {
    padding: 28px;
    border: 1px solid var(--border);
    border-radius: var(--radius-medium);
    background: rgba(12, 26, 53, 0.58);
}

.education-card span {
    color: var(--primary-light);
    font-size: 0.8rem;
    font-weight: 800;
}

.education-card h3 {
    margin-top: 12px;
    font-size: 1.14rem;
}

.education-card p {
    margin-top: 8px;
    color: var(--text-muted);
}

/* PERSONAL */

.personal-grid {
    display: grid;
    grid-template-columns: 0.9fr 1.1fr;
    gap: 80px;
}

.personal-content p {
    margin-bottom: 22px;
    color: var(--text-soft);
    font-size: 1.05rem;
}

.personal-content blockquote {
    margin-top: 34px;
    padding: 28px;
    border-left: 3px solid var(--primary-light);
    border-radius: 0 var(--radius-medium) var(--radius-medium) 0;
    background: rgba(37, 99, 235, 0.08);
    color: var(--text);
    font-size: 1.18rem;
    font-weight: 650;
}

/* CONTACT */

.contact-section {
    padding-top: 70px;
}

.contact-card {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 60px;
    padding: 55px;
    border: 1px solid rgba(96, 165, 250, 0.3);
    border-radius: var(--radius-large);
    background:
        radial-gradient(
            circle at 90% 10%,
            rgba(37, 99, 235, 0.28),
            transparent 43%
        ),
        var(--surface);
    box-shadow: var(--shadow);
}

.contact-card h2 {
    max-width: 650px;
    margin-top: 12px;
    font-size: clamp(2rem, 5vw, 3.6rem);
    line-height: 1.08;
    letter-spacing: -0.045em;
}

.contact-card p {
    max-width: 690px;
    margin-top: 20px;
    color: var(--text-soft);
}

.contact-card .availability-note {
    color: var(--primary-light);
    font-weight: 700;
}

.contact-actions {
    display: flex;
    flex-direction: column;
    align-items: stretch;
    justify-content: center;
    gap: 14px;
}

/* FOOTER */

.site-footer {
    padding: 32px 0;
    border-top: 1px solid var(--border);
}

.footer-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
    color: var(--text-muted);
    font-size: 0.86rem;
}

.footer-content a {
    color: var(--primary-light);
    font-weight: 700;
}

/* ANIMATIONS */

.reveal {
    opacity: 0;
    transform: translateY(24px);
    transition:
        opacity 700ms ease,
        transform 700ms ease;
}

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

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

    *,
    *::before,
    *::after {
        scroll-behavior: auto !important;
        transition-duration: 0.01ms !important;
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
    }

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

/* TABLET */

@media (max-width: 980px) {
    .section {
        padding: 90px 0;
    }

    .hero-grid,
    .section-grid,
    .personal-grid,
    .contact-card {
        grid-template-columns: 1fr;
    }

    .hero-grid,
    .section-grid,
    .personal-grid {
        gap: 50px;
    }

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

    .hero-description {
        margin-inline: auto;
    }

    .hero-tags,
    .hero-actions,
    .hero-links {
        justify-content: center;
    }

    .hero-visual {
        max-width: 510px;
        margin-inline: auto;
    }

    .availability-card {
        right: -10px;
    }

    .featured-project {
        display: block;
    }

    .featured-project .project-image {
        min-height: 300px;
    }

    .contact-card {
        gap: 34px;
    }
    .projects-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .project-card:last-child {
    grid-column: 1 / -1;
    max-width: 620px;
    width: 100%;
    justify-self: center;
    }
}

/* MOBILE NAVIGATION */

@media (max-width: 820px) {
    .menu-toggle {
        z-index: 1002;
        display: block;
    }

    .menu-toggle.active span:nth-child(1) {
        transform: translateY(7px) rotate(45deg);
    }

    .menu-toggle.active span:nth-child(2) {
        opacity: 0;
    }

    .menu-toggle.active span:nth-child(3) {
        transform: translateY(-7px) rotate(-45deg);
    }

    .nav-links {
        position: fixed;
        z-index: 1001;
        inset: 0;
        display: flex;
        flex-direction: column;
        align-items: center;
        justify-content: center;
        gap: 28px;
        background: rgba(5, 11, 24, 0.98);
        opacity: 0;
        pointer-events: none;
        transform: translateY(-15px);
        transition:
            opacity var(--transition),
            transform var(--transition);
    }

    .nav-links.open {
        opacity: 1;
        pointer-events: auto;
        transform: translateY(0);
    }

    .nav-links a {
        font-size: 1.15rem;
    }

    .skills-grid,
    .projects-grid,
    .education-grid {
        grid-template-columns: 1fr;
    }

    .timeline::before {
        left: 8px;
    }

    .timeline-item {
        grid-template-columns: 1fr;
        gap: 12px;
        padding-left: 35px;
    }

    .timeline-content::before {
        top: 34px;
        left: -33px;
    }

    .timeline-date {
        padding-left: 0;
    }
    .projects-grid {
    grid-template-columns: 1fr;
    }

    .project-card:last-child {
    grid-column: auto;
    max-width: none;
    }
}

/* SMALL MOBILE */

@media (max-width: 560px) {
    .container {
        width: min(calc(100% - 28px), var(--container));
    }

    .section {
        padding: 76px 0;
    }

    .hero {
        min-height: auto;
        padding-top: 130px;
    }

    .hero-content h1 {
        font-size: clamp(2.75rem, 14vw, 4rem);
    }

    .hero-description {
        font-size: 1rem;
    }

    .hero-actions {
        flex-direction: column;
    }

    .hero-actions .button {
        width: 100%;
    }

    .availability-card {
        position: relative;
        right: auto;
        bottom: auto;
        margin: -25px 12px 0;
    }

    .metrics {
        grid-template-columns: 1fr;
    }

    .skill-card,
    .project-content,
    .timeline-content,
    .education-card {
        padding: 24px;
    }

    .project-image {
        min-height: 220px;
    }

    .contact-card {
        padding: 30px 23px;
    }

    .footer-content {
        flex-direction: column;
        text-align: center;
    }
}