:root {
  --color-primary: #0a1628;
  --color-text: #0f172a;
  --color-text-secondary: #64748b;
  --color-accent: #2563eb;
  --color-accent-hover: #1d4ed8;
  --color-accent-light: #eff6ff;
  --color-surface: #f8fafc;
  --color-border: #e2e8f0;
  --color-white: #ffffff;
  --color-success: #10b981;
  --header-height: 64px;
  --container-padding: 20px;
  --radius-card: 18px;
  --radius-button: 12px;
  --transition: 180ms ease;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-height) + 16px);
}

body {
  margin: 0;
  overflow-x: hidden;
  background: var(--color-white);
  color: var(--color-text);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 16px;
  line-height: 1.5;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

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

button,
a {
  font: inherit;
}

a {
  color: inherit;
}

p,
h1,
h2,
h3,
h4,
figure {
  margin: 0;
}

h1,
h2,
h3,
h4 {
  color: var(--color-primary);
  text-wrap: balance;
}

h1 {
  font-size: clamp(2.375rem, 9.2vw, 3.5rem);
  font-weight: 700;
  letter-spacing: -0.025em;
  line-height: 1.16;
}

h2 {
  max-width: 960px;
  font-size: clamp(2rem, 7.5vw, 2.625rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.19;
}

h3,
h4 {
  line-height: 1.35;
}

section[id] {
  scroll-margin-top: calc(var(--header-height) + 16px);
}

.container {
  width: min(100%, 1440px);
  margin-inline: auto;
  padding-inline: var(--container-padding);
}

.section,
.hero {
  padding-block: 72px;
}

.section-surface {
  background: var(--color-surface);
}

.eyebrow {
  margin-bottom: 20px;
  color: var(--color-accent);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  line-height: 1.35;
  text-transform: uppercase;
}

.section-intro {
  max-width: 980px;
  margin-top: 24px;
  color: var(--color-text-secondary);
  font-size: 1.0625rem;
  line-height: 1.75;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: fixed;
  z-index: 1000;
  top: 12px;
  left: 12px;
  padding: 12px 16px;
  transform: translateY(-160%);
  border-radius: 8px;
  background: var(--color-primary);
  color: var(--color-white);
  font-weight: 600;
  text-decoration: none;
  transition: transform var(--transition);
}

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

:focus-visible {
  outline: 3px solid #1d4ed8;
  outline-offset: 3px;
}

.site-header {
  position: sticky;
  z-index: 100;
  top: 0;
  min-height: var(--header-height);
  border-bottom: 1px solid rgba(226, 232, 240, 0.9);
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(12px);
}

.header-inner {
  position: relative;
  display: flex;
  min-height: var(--header-height);
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: inline-flex;
  min-width: 0;
  min-height: 44px;
  align-items: center;
  gap: 12px;
  color: var(--color-text);
  font-weight: 600;
  text-decoration: none;
}

.brand-monogram {
  display: grid;
  width: 40px;
  height: 40px;
  flex: 0 0 auto;
  place-items: center;
  border-radius: 10px;
  background: var(--color-accent);
  color: var(--color-white);
  font-size: 0.875rem;
  font-weight: 700;
}

.brand-name {
  overflow: hidden;
  font-size: 1rem;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.menu-toggle {
  display: none;
  width: 44px;
  height: 44px;
  padding: 10px;
  cursor: pointer;
  border: 1px solid var(--color-border);
  border-radius: 10px;
  background: var(--color-white);
}

.menu-toggle-line {
  display: block;
  width: 20px;
  height: 2px;
  margin: 4px auto;
  border-radius: 999px;
  background: var(--color-primary);
  transition: transform var(--transition), opacity var(--transition);
}

.menu-toggle[aria-expanded="true"] .menu-toggle-line:nth-child(1) {
  transform: translateY(6px) rotate(45deg);
}

.menu-toggle[aria-expanded="true"] .menu-toggle-line:nth-child(2) {
  opacity: 0;
}

.menu-toggle[aria-expanded="true"] .menu-toggle-line:nth-child(3) {
  transform: translateY(-6px) rotate(-45deg);
}

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

.site-nav > a:not(.button) {
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  color: var(--color-text-secondary);
  font-size: 0.875rem;
  font-weight: 500;
  text-decoration: none;
  transition: color var(--transition);
}

.site-nav > a:not(.button):hover {
  color: var(--color-accent);
}

.button {
  display: inline-flex;
  min-height: 46px;
  align-items: center;
  justify-content: center;
  gap: 7px;
  padding: 12px 20px;
  border: 1px solid transparent;
  border-radius: var(--radius-button);
  font-size: 0.875rem;
  font-weight: 600;
  line-height: 1.4;
  text-align: center;
  text-decoration: none;
  transition: background-color var(--transition), border-color var(--transition), color var(--transition), transform var(--transition);
}

.button:hover {
  transform: translateY(-1px);
}

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

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

.button-secondary {
  border-color: var(--color-border);
  background: var(--color-white);
  color: var(--color-text);
}

.button-secondary:hover,
.button-light:hover {
  border-color: #bfdbfe;
  color: var(--color-accent-hover);
}

.button-light {
  border-color: var(--color-border);
  background: var(--color-white);
  color: var(--color-text);
}

.nav-cv {
  min-width: 160px;
}

.hero {
  padding-block: 56px 64px;
}

.hero-grid {
  display: grid;
  gap: 48px;
}

.hero-copy {
  min-width: 0;
}

.hero-description {
  max-width: 680px;
  margin-top: 24px;
  color: var(--color-text-secondary);
  font-size: 1.0625rem;
  line-height: 1.75;
}

.button-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.hero-actions {
  margin-top: 32px;
}

.hero-portrait {
  position: relative;
  display: flex;
  width: min(100%, 456px);
  margin-inline: auto;
  justify-self: center;
  align-self: start;
  flex-direction: column;
  align-items: center;
  gap: 16px;
}

.hero-portrait picture {
  display: block;
  width: 100%;
  aspect-ratio: 7 / 8;
  overflow: hidden;
  border-radius: 28px;
}

.hero-portrait img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 25%;
}

.location-badge {
  display: inline-flex;
  min-height: 36px;
  align-items: center;
  gap: 10px;
  padding: 8px 14px;
  border: 1px solid var(--color-border);
  border-radius: 999px;
  background: var(--color-white);
  color: var(--color-text);
  font-size: 0.75rem;
  font-weight: 500;
}

.status-dot {
  width: 8px;
  height: 8px;
  flex: 0 0 auto;
  border-radius: 50%;
  background: var(--color-success);
  box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.12);
}

.profile-copy {
  display: grid;
  gap: 16px;
}

.expertise-grid,
.stack-grid {
  display: grid;
  gap: 16px;
  margin-top: 40px;
}

.card {
  min-width: 0;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  background: var(--color-white);
  transition: border-color var(--transition), transform var(--transition);
}

.card:hover {
  border-color: #cbd5e1;
  transform: translateY(-2px);
}

.expertise-card {
  padding: 24px;
}

.card-heading {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
}

.card-heading h3 {
  font-size: 1.25rem;
  font-weight: 600;
}

.card-heading span {
  color: var(--color-accent);
  font-size: 0.75rem;
  font-weight: 700;
}

.expertise-card > p {
  margin-top: 18px;
  color: var(--color-text-secondary);
  font-size: 0.9375rem;
}

.experience-list {
  display: grid;
  gap: 12px;
  margin-top: 32px;
}

.experience-card {
  display: grid;
  gap: 20px;
  padding: 24px;
}

.experience-meta,
.experience-detail {
  min-width: 0;
}

.period {
  margin-bottom: 7px;
  color: var(--color-accent);
  font-size: 0.75rem;
  font-weight: 700;
  line-height: 1.35;
}

.experience-meta h3 {
  font-size: 1.1875rem;
  font-weight: 600;
}

.experience-detail h4 {
  font-size: 1rem;
  font-weight: 600;
}

.experience-detail > p:not(.technology-list) {
  margin-top: 12px;
  color: var(--color-text-secondary);
  font-size: 0.875rem;
  line-height: 1.6;
}

.technology-list {
  margin-top: 14px;
  color: var(--color-accent);
  font-size: 0.75rem;
  font-weight: 500;
  line-height: 1.5;
}

.stack-card {
  padding: 24px;
}

.stack-card h3 {
  font-size: 1rem;
  font-weight: 600;
}

.stack-card p {
  margin-top: 14px;
  color: var(--color-text-secondary);
  font-size: 0.875rem;
  line-height: 1.6;
}

.zystek {
  padding-block: 64px;
  background: var(--color-accent-light);
}

.zystek-inner {
  display: grid;
  gap: 32px;
}

.zystek .eyebrow {
  margin-bottom: 14px;
}

.zystek h2 {
  max-width: 840px;
  font-size: clamp(1.75rem, 6.5vw, 2.125rem);
  line-height: 1.24;
}

.zystek p:not(.eyebrow) {
  max-width: 760px;
  margin-top: 14px;
  color: var(--color-text-secondary);
  font-size: 1.0625rem;
  line-height: 1.65;
}

.zystek .button {
  align-self: start;
}

.contact {
  padding-block: 72px;
  background: var(--color-primary);
  color: #cbd5e1;
}

.contact-grid {
  display: grid;
  gap: 36px;
}

.contact .eyebrow {
  color: #60a5fa;
}

.contact h2 {
  color: var(--color-white);
  font-size: clamp(2rem, 7vw, 2.375rem);
  line-height: 1.26;
}

.contact p:not(.eyebrow) {
  max-width: 720px;
  margin-top: 16px;
  font-size: 1.0625rem;
  line-height: 1.65;
}

.contact-actions {
  display: grid;
  gap: 12px;
}

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

.contact :focus-visible,
.skip-link:focus-visible {
  outline-color: #bfdbfe;
}

.site-footer {
  padding-block: 28px;
  background: var(--color-white);
}

.footer-inner {
  display: flex;
  flex-direction: column;
  gap: 10px;
  color: var(--color-text-secondary);
  font-size: 0.8125rem;
  line-height: 1.55;
}

.footer-inner p:last-child {
  color: var(--color-text);
  font-weight: 500;
}

@media (max-width: 767px) {
  .hero-portrait {
    width: min(100%, 350px);
  }
}

@media (max-width: 959px) {
  .site-nav {
    width: 100%;
    flex-wrap: wrap;
    gap: 8px 20px;
    padding-bottom: 16px;
  }

  .site-nav > a:not(.button) {
    flex: 1 1 calc(50% - 10px);
  }

  .site-nav .nav-cv {
    width: 100%;
  }

  .header-inner {
    flex-wrap: wrap;
  }

  .js .menu-toggle {
    display: block;
  }

  .js .header-inner {
    flex-wrap: nowrap;
  }

  .js .site-nav {
    position: absolute;
    top: calc(100% + 1px);
    right: var(--container-padding);
    left: var(--container-padding);
    width: auto;
    padding: 14px;
    transform: translateY(-8px);
    border: 1px solid var(--color-border);
    border-radius: 14px;
    opacity: 0;
    background: var(--color-white);
    box-shadow: 0 14px 35px rgba(15, 23, 42, 0.12);
    pointer-events: none;
    visibility: hidden;
    transition: opacity var(--transition), transform var(--transition), visibility var(--transition);
  }

  .js .site-nav[data-open="true"] {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
    visibility: visible;
  }

  .button-row .button {
    width: 100%;
  }
}

@media (min-width: 768px) {
  :root {
    --header-height: 88px;
    --container-padding: 48px;
  }

  .section,
  .hero {
    padding-block: 88px;
  }

  .expertise-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 20px;
  }

  .experience-card {
    grid-template-columns: 190px minmax(0, 1fr);
    gap: 28px;
    padding: 28px;
  }

  .stack-grid {
    grid-template-columns: repeat(6, minmax(0, 1fr));
    gap: 18px;
  }

  .stack-card {
    grid-column: span 2;
  }

  .stack-wide {
    grid-column: span 3;
  }

  .zystek-inner,
  .contact-grid {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
  }

  .zystek .button {
    min-width: 190px;
    align-self: center;
  }

  .contact-actions {
    width: 280px;
  }

  .footer-inner {
    flex-direction: row;
    justify-content: space-between;
    gap: 32px;
  }
}

@media (min-width: 960px) {
  .hero-grid {
    grid-template-columns: minmax(0, 1.35fr) minmax(300px, 0.85fr);
    align-items: center;
  }
}

@media (min-width: 1200px) {
  .hero {
    padding-block: 92px;
  }

  .hero-description {
    font-size: 1.125rem;
    line-height: 1.67;
  }

  .section {
    padding-block: 96px 104px;
  }

  .experience-card {
    grid-template-columns: 220px minmax(0, 1fr);
    gap: 32px;
  }

  .zystek {
    padding-block: 76px;
  }

  .contact {
    padding-block: 88px;
  }
}

@media (min-width: 1280px) {
  :root {
    --container-padding: 80px;
  }

  .hero-grid {
    grid-template-columns: 720px minmax(0, 1fr);
    gap: 64px;
  }
}

@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;
  }
}