:root {
    --color-ink: #172033;
    --color-heading: #0b1220;
    --color-muted: #5d687a;
    --color-border: #dfe4ec;
    --color-surface: #f6f8fb;
    --color-white: #ffffff;
    --color-accent: #2457d6;
    --color-accent-dark: #1945b5;
    --color-secondary: #0f766e;
    --color-secondary-soft: #e7f5f2;
    --shadow-soft: 0 18px 45px rgba(20, 35, 65, 0.08);
    --radius-small: 0.65rem;
    --radius-medium: 1rem;
    --radius-large: 1.5rem;
    --container: 70rem;
    --content: 48rem;
}

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

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    color: var(--color-ink);
    background: var(--color-white);
    font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    font-size: 1rem;
    line-height: 1.7;
    text-rendering: optimizeLegibility;
}

main {
    flex: 1;
}

h1,
h2,
h3,
p,
ul {
    margin-top: 0;
}

h1,
h2,
h3 {
    color: var(--color-heading);
    line-height: 1.15;
    letter-spacing: -0.025em;
}

h1 {
    margin-bottom: 1.25rem;
    font-size: clamp(2.6rem, 8vw, 5rem);
}

h2 {
    margin-bottom: 1rem;
    font-size: clamp(1.75rem, 4vw, 2.5rem);
}

h3 {
    margin-bottom: 0.65rem;
    font-size: 1.25rem;
}

a {
    color: var(--color-accent);
}

a:focus-visible,
button:focus-visible {
    outline: 3px solid rgba(36, 87, 214, 0.35);
    outline-offset: 4px;
}

.skip-link {
    position: fixed;
    z-index: 100;
    top: 0.75rem;
    left: 0.75rem;
    padding: 0.65rem 1rem;
    border-radius: var(--radius-small);
    color: var(--color-white);
    background: var(--color-heading);
    transform: translateY(-150%);
}

.skip-link:focus {
    transform: translateY(0);
}

.site-header {
    position: sticky;
    z-index: 20;
    top: 0;
    border-bottom: 1px solid rgba(223, 228, 236, 0.9);
    background: rgba(255, 255, 255, 0.94);
    backdrop-filter: blur(12px);
}

.navbar {
    width: min(calc(100% - 2rem), var(--container));
    min-height: 4.5rem;
    margin-inline: auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
}

.logo {
    color: var(--color-heading);
    font-size: 1.05rem;
    font-weight: 750;
    letter-spacing: -0.02em;
    text-decoration: none;
}

.nav-toggle {
    width: 2.75rem;
    height: 2.75rem;
    padding: 0;
    display: grid;
    place-items: center;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-small);
    color: var(--color-heading);
    background: var(--color-white);
    cursor: pointer;
}

.nav-toggle svg {
    width: 1.35rem;
    height: 1.35rem;
}

.nav-links {
    position: absolute;
    top: calc(100% + 1px);
    right: 0;
    left: 0;
    margin: 0;
    padding: 0.75rem 1rem 1rem;
    display: none;
    list-style: none;
    border-bottom: 1px solid var(--color-border);
    background: var(--color-white);
}

.nav-links.is-open {
    display: block;
}

.nav-links a {
    padding: 0.75rem;
    display: block;
    border-radius: var(--radius-small);
    color: var(--color-muted);
    font-weight: 600;
    text-decoration: none;
}

.nav-links a:hover,
.nav-links a[aria-current="page"] {
    color: var(--color-accent);
    background: var(--color-surface);
}

.container {
    width: min(calc(100% - 2rem), var(--container));
    margin-inline: auto;
}

.hero {
    padding-block: clamp(4rem, 10vw, 7.5rem);
    overflow: hidden;
    background:
        radial-gradient(circle at 85% 30%, rgba(36, 87, 214, 0.1), transparent 28rem),
        var(--color-surface);
}

.hero-content {
    display: grid;
    align-items: center;
    gap: 3rem;
}

.eyebrow {
    margin-bottom: 1rem;
    color: var(--color-accent);
    font-size: 0.78rem;
    font-weight: 750;
    letter-spacing: 0.12em;
    text-transform: uppercase;
}

.eyebrow--current {
    color: var(--color-secondary);
}

.hero-text,
.page-intro {
    max-width: 42rem;
    margin-bottom: 2rem;
    color: var(--color-muted);
    font-size: clamp(1.05rem, 2.5vw, 1.25rem);
}

.hero-buttons,
.card-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.section-actions {
    margin-top: 2rem;
}

.btn {
    min-height: 2.9rem;
    padding: 0.7rem 1.1rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border: 1px solid transparent;
    border-radius: var(--radius-small);
    font-weight: 700;
    text-decoration: none;
    transition: background-color 160ms ease, border-color 160ms ease, color 160ms ease;
}

.primary-btn {
    color: var(--color-white);
    background: var(--color-accent);
}

.primary-btn:hover {
    background: var(--color-accent-dark);
}

.secondary-btn {
    border-color: var(--color-border);
    color: var(--color-heading);
    background: var(--color-white);
}

.secondary-btn:hover {
    border-color: #b9c2d0;
    background: var(--color-surface);
}

.hero-photo {
    display: grid;
    place-items: center;
}

.profile-photo {
    width: clamp(11rem, 42vw, 16rem);
    height: clamp(11rem, 42vw, 16rem);
    aspect-ratio: 1;
    display: block;
    object-fit: cover;
    border: 0.65rem solid rgba(255, 255, 255, 0.75);
    border-radius: 50%;
    box-shadow: var(--shadow-soft);
}

.section {
    padding-block: clamp(4rem, 8vw, 6rem);
}

.section + .section {
    border-top: 1px solid var(--color-border);
}

.section-heading {
    max-width: 45rem;
    margin-bottom: 2rem;
}

.section-heading p,
.lead,
.muted {
    color: var(--color-muted);
}

.focus-layout,
.about-grid,
.contact-grid {
    display: grid;
    gap: 2rem;
}

.focus-card,
.project-card,
.value-card,
.contact-card {
    border: 1px solid var(--color-border);
    border-radius: var(--radius-medium);
    background: var(--color-white);
}

.focus-card {
    padding: clamp(1.5rem, 4vw, 2.25rem);
    background: var(--color-surface);
}

.tag-list {
    margin: 1.25rem 0 0;
    padding: 0;
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    list-style: none;
}

.tag-list li,
.status {
    padding: 0.35rem 0.65rem;
    border-radius: 999px;
    color: #394559;
    background: #e9edf4;
    font-size: 0.78rem;
    font-weight: 700;
}

.project-grid,
.values-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(min(100%, 16rem), 1fr));
    gap: 1rem;
}

.project-card {
    min-width: 0;
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 0.85rem;
}

.project-card p {
    color: var(--color-muted);
}

.project-card .tag-list {
    margin-top: auto;
}

.project-card .card-actions {
    margin-top: 0.35rem;
}

.project-card .card-actions .text-link {
    font-size: 0.9rem;
}

.featured-project-grid {
    grid-template-columns: repeat(auto-fit, minmax(min(100%, 19rem), 1fr));
}

.project-card--preview {
    overflow: hidden;
}

.project-card--preview[hidden] {
    display: none;
}

.project-thumbnail {
    margin: -1.5rem -1.5rem 0.35rem;
    aspect-ratio: 16 / 10;
    display: block;
    overflow: hidden;
    border-bottom: 1px solid var(--color-border);
    background: var(--color-surface);
}

.project-thumbnail img {
    width: 100%;
    height: 100%;
    display: block;
    object-fit: cover;
    object-position: center;
}

.project-thumbnail:hover img {
    opacity: 0.92;
}

.project-thumbnail:focus-visible {
    outline-offset: -4px;
}

.project-card--detailed {
    padding: clamp(1.5rem, 4vw, 2rem);
}

.project-card--featured {
    grid-column: 1 / -1;
}

.project-cover {
    width: 100%;
    height: auto;
    display: block;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-small);
}

.project-feature-layout {
    display: grid;
    align-items: center;
    gap: clamp(1.5rem, 4vw, 3rem);
}

.project-feature-content {
    min-width: 0;
}

.project-feature-content .tag-list {
    margin-top: 1.25rem;
}

.project-gallery {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(8rem, 0.32fr);
    align-items: stretch;
    gap: 1rem;
}

.project-shot {
    margin: 0;
    overflow: hidden;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-small);
    background: var(--color-surface);
}

.project-shot img {
    width: 100%;
    height: 100%;
    max-height: 24rem;
    display: block;
    object-fit: cover;
    object-position: top;
}

.project-shot figcaption {
    position: absolute;
    width: 1px;
    height: 1px;
    overflow: hidden;
    clip: rect(0 0 0 0);
    white-space: nowrap;
}

.robot-project-layout {
    display: grid;
    gap: clamp(1.5rem, 4vw, 3rem);
    align-items: start;
}

.robot-media {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.85rem;
}

.robot-media video,
.robot-media img {
    width: 100%;
    height: clamp(22rem, 42vw, 34rem);
    aspect-ratio: 9 / 16;
    display: block;
    object-fit: cover;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-small);
    background: var(--color-surface);
}

@media (max-width: 36rem) {
    .project-gallery {
        grid-template-columns: 1fr;
    }

    .project-shot--mobile {
        display: none;
    }

    .robot-media {
        grid-template-columns: 1fr;
    }

    .robot-media img {
        height: auto;
        aspect-ratio: 4 / 3;
        object-position: center 42%;
    }

    .robot-media video {
        height: auto;
    }
}

.project-meta {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
}

.project-number {
    color: #a1a9b6;
    font-size: 0.85rem;
    font-weight: 750;
}

.text-link {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    font-weight: 700;
    text-decoration: none;
}

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

.page-header {
    padding-block: clamp(4rem, 9vw, 7rem);
    background: var(--color-surface);
}

.page-header h1 {
    font-size: clamp(2.5rem, 7vw, 4.5rem);
}

.page-header .page-intro {
    margin-bottom: 0;
}

.content-section {
    max-width: var(--content);
}

.prose p {
    margin-bottom: 1.4rem;
}

.prose h2 {
    margin-top: 3rem;
}

.values-grid {
    margin-top: 2rem;
}

.value-card {
    padding: 1.35rem;
}

.timeline {
    position: relative;
    max-width: 52rem;
}

.timeline-key {
    margin-bottom: 2rem;
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem 1.25rem;
    color: var(--color-muted);
    font-size: 0.85rem;
    font-weight: 700;
}

.timeline-key span {
    display: inline-flex;
    align-items: center;
    gap: 0.45rem;
}

.key-dot {
    width: 0.65rem;
    height: 0.65rem;
    border-radius: 50%;
    background: var(--color-border);
}

.key-dot--complete {
    background: var(--color-accent);
}

.key-dot--current {
    background: var(--color-secondary);
}

.key-dot--planned {
    border: 2px solid #98a2b3;
    background: var(--color-white);
}

.timeline::before {
    content: "";
    position: absolute;
    top: 1rem;
    bottom: 1rem;
    left: 0.45rem;
    width: 2px;
    background: var(--color-border);
}

.timeline-item {
    position: relative;
    padding: 0 0 2.75rem 2.5rem;
}

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

.timeline-item::before {
    content: "";
    position: absolute;
    top: 0.35rem;
    left: 0;
    width: 0.95rem;
    height: 0.95rem;
    border: 3px solid var(--color-white);
    border-radius: 50%;
    background: var(--color-accent);
    box-shadow: 0 0 0 1px var(--color-accent);
}

.timeline-item--current::before {
    background: var(--color-secondary);
    box-shadow: 0 0 0 1px var(--color-secondary), 0 0 0 5px var(--color-secondary-soft);
}

.timeline-item--planned::before {
    background: var(--color-white);
    box-shadow: 0 0 0 2px #98a2b3;
}

.timeline-date {
    margin-bottom: 0.35rem;
    color: var(--color-accent);
    font-size: 0.82rem;
    font-weight: 750;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.timeline-status {
    margin-left: 0.45rem;
    padding: 0.2rem 0.5rem;
    border-radius: 999px;
    background: #eaf0ff;
    font-size: 0.68rem;
    letter-spacing: 0.04em;
    vertical-align: 0.08rem;
}

.timeline-item--current .timeline-date {
    color: var(--color-secondary);
}

.timeline-item--current .timeline-status {
    background: var(--color-secondary-soft);
}

.timeline-item--planned .timeline-date {
    color: var(--color-muted);
}

.timeline-item--planned .timeline-status {
    background: var(--color-surface);
}

.timeline-item p {
    color: var(--color-muted);
}

.contact-grid {
    align-items: start;
}

.contact-card {
    padding: clamp(1.5rem, 4vw, 2rem);
}

.contact-list {
    margin: 1.5rem 0 0;
    padding: 0;
    list-style: none;
}

.contact-list li + li {
    margin-top: 1rem;
}

.contact-list a {
    font-weight: 700;
    overflow-wrap: anywhere;
}

.social-links {
    margin-top: 1.5rem;
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.social-link {
    min-height: 3rem;
    padding: 0.65rem 0.9rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.55rem;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-small);
    color: var(--color-heading);
    background: var(--color-surface);
    font-weight: 700;
    text-decoration: none;
}

.social-link:hover {
    border-color: #b9c2d0;
    color: var(--color-heading);
    background: var(--color-white);
}

.social-link svg {
    width: 1.4rem;
    height: 1.4rem;
    fill: none;
    stroke: currentColor;
    stroke-width: 1.8;
}

.social-link--instagram svg {
    stroke: url(#instagram-gradient);
}

.social-link--instagram .social-icon-fill {
    fill: #d62976;
}

.social-link--github svg {
    color: #181717;
}

.social-link .social-icon-fill {
    fill: currentColor;
    stroke: none;
}

.availability {
    padding: 1.5rem;
    border-left: 3px solid var(--color-accent);
    border-radius: 0 var(--radius-small) var(--radius-small) 0;
    background: var(--color-surface);
}

.site-footer {
    padding-block: 2rem;
    border-top: 1px solid var(--color-border);
    color: var(--color-muted);
    background: var(--color-surface);
    font-size: 0.9rem;
}

.footer-content {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.site-footer p {
    margin: 0;
}

.site-footer a {
    color: var(--color-heading);
    font-weight: 650;
}

@media (min-width: 48rem) {
    .nav-toggle {
        display: none;
    }

    .nav-links,
    .nav-links.is-open {
        position: static;
        padding: 0;
        display: flex;
        gap: 0.25rem;
        border: 0;
        background: transparent;
    }

    .nav-links a {
        padding: 0.45rem 0.7rem;
    }

    .hero-content {
        grid-template-columns: minmax(0, 1.45fr) minmax(15rem, 0.65fr);
        gap: 5rem;
    }

    .focus-layout,
    .about-grid,
    .contact-grid {
        grid-template-columns: minmax(0, 1.25fr) minmax(18rem, 0.75fr);
        gap: 4rem;
    }

    .project-feature-layout {
        grid-template-columns: minmax(0, 1.15fr) minmax(18rem, 0.85fr);
    }

    .robot-project-layout {
        grid-template-columns: minmax(18rem, 0.85fr) minmax(0, 1.15fr);
    }

    .footer-content {
        flex-direction: row;
        align-items: center;
        justify-content: space-between;
    }
}

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

    *,
    *::before,
    *::after {
        transition-duration: 0.01ms !important;
    }
}