:root {
  color-scheme: light;
  --bg: #f6f8fb;
  --surface: #ffffff;
  --surface-soft: #edf2f7;
  --ink: #121722;
  --muted: #5c6675;
  --line: #d6deea;
  --line-strong: #b8c4d4;
  --teal: #00796b;
  --teal-dark: #005f55;
  --blue: #254f9a;
  --amber: #b9770e;
  --rose: #b33a4b;
  --header-bg: rgba(246, 248, 251, 0.92);
  --media-frame: rgba(255, 255, 255, 0.48);
  --on-accent: #ffffff;
  --shadow: 0 22px 60px rgba(32, 45, 67, 0.10);
}

:root[data-theme-mode="dark"] {
  color-scheme: dark;
  --bg: #101419;
  --surface: #171d24;
  --surface-soft: #222a34;
  --ink: #eef3f8;
  --muted: #a9b5c4;
  --line: #303a46;
  --line-strong: #4d5b6a;
  --teal: #64d8cc;
  --teal-dark: #43c2b5;
  --blue: #8eb4ff;
  --amber: #f0b85d;
  --rose: #ff8798;
  --header-bg: rgba(16, 20, 25, 0.92);
  --media-frame: rgba(255, 255, 255, 0.14);
  --on-accent: #06201d;
  --shadow: 0 22px 60px rgba(0, 0, 0, 0.36);
}

@media (prefers-color-scheme: dark) {
  :root[data-theme-mode="system"] {
    color-scheme: dark;
    --bg: #101419;
    --surface: #171d24;
    --surface-soft: #222a34;
    --ink: #eef3f8;
    --muted: #a9b5c4;
    --line: #303a46;
    --line-strong: #4d5b6a;
    --teal: #64d8cc;
    --teal-dark: #43c2b5;
    --blue: #8eb4ff;
    --amber: #f0b85d;
    --rose: #ff8798;
    --header-bg: rgba(16, 20, 25, 0.92);
    --media-frame: rgba(255, 255, 255, 0.14);
    --on-accent: #06201d;
    --shadow: 0 22px 60px rgba(0, 0, 0, 0.36);
  }
}

* {
  box-sizing: border-box;
}

html {
  min-height: 100%;
  scroll-behavior: smooth;
  background: var(--bg);
}

body {
  min-height: 100%;
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: Arial, Helvetica, sans-serif;
  line-height: 1.5;
  text-rendering: optimizeLegibility;
}

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

a {
  color: inherit;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 20px;
  padding: 16px 28px;
  border-bottom: 1px solid var(--line);
  background: var(--header-bg);
  backdrop-filter: blur(12px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
}

.brand span {
  display: grid;
  width: 34px;
  height: 34px;
  place-items: center;
  border-radius: 8px;
  background: var(--ink);
  color: #ffffff;
  font-size: 0.82rem;
  font-weight: 800;
}

.brand strong {
  font-size: 0.95rem;
}

.main-nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 4px;
}

.main-nav a,
.language-switcher button,
.theme-switcher button,
.hero-actions a,
.contact-links a,
.project-card-header a,
.site-footer a {
  min-height: 38px;
  border-radius: 8px;
  text-decoration: none;
}

.main-nav a {
  display: inline-flex;
  align-items: center;
  padding: 8px 10px;
  color: var(--muted);
  font-weight: 700;
}

.header-controls {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 10px;
}

.main-nav a:hover,
.site-footer a:hover {
  color: var(--ink);
}

.language-switcher,
.theme-switcher {
  display: inline-flex;
  gap: 4px;
  padding: 3px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
}

.language-switcher button,
.theme-switcher button {
  border: 0;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  font: inherit;
  font-size: 0.82rem;
  font-weight: 800;
  padding: 7px 8px;
}

.language-switcher button[aria-pressed="true"],
.theme-switcher button[aria-pressed="true"] {
  background: var(--teal);
  color: var(--on-accent);
}

main {
  overflow: hidden;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(360px, 0.72fr);
  gap: 54px;
  align-items: center;
  width: min(1180px, calc(100% - 48px));
  min-height: 720px;
  margin: 0 auto;
  padding: 58px 0 70px;
}

.hero-copy,
.section-heading,
.about-copy,
.contact-section > div:first-child {
  display: grid;
  gap: 16px;
}

.eyebrow {
  margin: 0;
  color: var(--teal);
  font-size: 0.88rem;
  font-weight: 800;
  text-transform: uppercase;
}

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

h1 {
  max-width: 780px;
  font-size: 6.4rem;
  line-height: 0.96;
  letter-spacing: 0;
}

h2 {
  max-width: 760px;
  font-size: 3rem;
  line-height: 1.06;
  letter-spacing: 0;
}

h3 {
  font-size: 1.35rem;
  line-height: 1.22;
  letter-spacing: 0;
}

.intro {
  max-width: 680px;
  color: var(--muted);
  font-size: 1.35rem;
}

.hero-actions,
.contact-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.hero-actions a,
.contact-links a,
.project-card-header a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--ink);
  font-weight: 800;
}

.hero-actions a {
  padding: 10px 15px;
}

.hero-actions .primary-link {
  border-color: var(--teal);
  background: var(--teal);
  color: var(--on-accent);
}

.hero-actions a:hover,
.contact-links a:hover,
.project-card-header a:hover {
  border-color: var(--line-strong);
}

.hero-actions .primary-link:hover {
  background: var(--teal-dark);
}

.hero-media {
  position: relative;
  margin: 0;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.hero-media::after {
  content: "";
  position: absolute;
  inset: 0;
  border: 1px solid var(--media-frame);
  border-radius: 8px;
  pointer-events: none;
}

.hero-media img {
  width: 100%;
  aspect-ratio: 4 / 5;
  object-fit: cover;
}

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

.signal-band,
.section,
.contact-section {
  width: min(1180px, calc(100% - 48px));
  margin: 0 auto;
}

.signal-band {
  display: grid;
  grid-template-columns: minmax(0, 0.7fr) minmax(0, 1fr);
  gap: 28px;
  align-items: center;
  padding: 22px 0 54px;
  border-top: 1px solid var(--line);
}

.signal-band span,
.now-list span,
.project-card-header span {
  color: var(--teal);
  font-size: 0.82rem;
  font-weight: 800;
  text-transform: uppercase;
}

.signal-band strong {
  display: block;
  margin-top: 6px;
  font-size: 1.55rem;
}

.signal-band p {
  color: var(--muted);
  font-size: 1.08rem;
}

.section {
  padding: 74px 0;
}

.section-heading {
  max-width: 760px;
  margin-bottom: 30px;
}

.section-heading p:not(.eyebrow) {
  color: var(--muted);
  font-size: 1.12rem;
}

.section-heading .section-note {
  font-size: 0.96rem;
  font-weight: 700;
}

.project-grid,
.repo-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

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

.portfolio-grid .featured-project {
  grid-column: span 2;
}

.project-card,
.repo-card,
.now-list article {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
}

.project-card {
  display: grid;
  gap: 18px;
  align-content: start;
  padding: 22px;
}

.featured-project {
  border-color: rgba(0, 121, 107, 0.42);
  box-shadow: 0 18px 48px rgba(0, 121, 107, 0.10);
}

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

.project-links,
.project-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.project-links {
  justify-content: flex-end;
}

.project-card-header a {
  min-height: 32px;
  padding: 6px 9px;
  font-size: 0.86rem;
}

.project-card p,
.repo-card p,
.now-list p,
.about-copy p {
  color: var(--muted);
}

.project-card ul {
  display: grid;
  gap: 8px;
  margin: 0;
  padding-left: 18px;
  color: var(--muted);
}

.project-card li::marker {
  color: var(--amber);
}

.project-meta {
  margin-top: -4px;
}

.project-meta span {
  display: inline-flex;
  align-items: center;
  min-height: 28px;
  padding: 4px 8px;
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--muted);
  font-size: 0.84rem;
  font-weight: 700;
}

.split-section {
  display: grid;
  grid-template-columns: minmax(0, 0.72fr) minmax(0, 1.28fr);
  gap: 36px;
  align-items: start;
}

.compact-heading {
  margin-bottom: 0;
}

.now-list {
  display: grid;
  gap: 14px;
}

.now-list article {
  display: grid;
  gap: 9px;
  padding: 20px;
}

.now-list article:first-child {
  border-left: 5px solid var(--blue);
}

.now-list article:last-child {
  border-left: 5px solid var(--rose);
}

.github-section {
  border-top: 1px solid var(--line);
}

.repo-card {
  display: grid;
  gap: 12px;
  min-height: 180px;
  align-content: start;
  padding: 18px;
}

.repo-card a {
  font-weight: 800;
  text-decoration-thickness: 2px;
  text-underline-offset: 4px;
}

.repo-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: auto;
}

.repo-meta span {
  display: inline-flex;
  align-items: center;
  min-height: 28px;
  padding: 4px 8px;
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--muted);
  font-size: 0.84rem;
  font-weight: 700;
}

.about-section {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  gap: 42px;
  border-top: 1px solid var(--line);
}

.about-copy {
  font-size: 1.18rem;
}

.contact-section {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 24px;
  align-items: end;
  padding: 58px 0;
  border-top: 1px solid var(--line);
}

.contact-links {
  justify-content: end;
}

.contact-links a {
  padding: 10px 14px;
}

.site-footer {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 12px;
  width: min(1180px, calc(100% - 48px));
  margin: 0 auto;
  padding: 24px 0 36px;
  border-top: 1px solid var(--line);
  color: var(--muted);
}

.site-footer a {
  color: var(--muted);
  font-weight: 800;
}

@media (max-width: 980px) {
  .site-header {
    grid-template-columns: 1fr auto;
  }

  .main-nav {
    grid-column: 1 / -1;
    justify-content: flex-start;
    order: 3;
  }

  .hero,
  .split-section,
  .about-section,
  .contact-section,
  .signal-band {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
    padding-top: 42px;
  }

  h1 {
    font-size: 4.7rem;
  }

  h2 {
    font-size: 2.5rem;
  }

  .hero-media img {
    aspect-ratio: 16 / 10;
  }

  .project-grid,
  .repo-grid {
    grid-template-columns: 1fr 1fr;
  }

  .contact-links {
    justify-content: flex-start;
  }
}

@media (max-width: 680px) {
  .site-header {
    position: static;
    gap: 10px 12px;
    padding: 10px 16px;
  }

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

  .hero,
  .signal-band,
  .section,
  .contact-section,
  .site-footer {
    width: min(100% - 32px, 1180px);
  }

  .main-nav {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 4px;
    width: 100%;
  }

  .main-nav a {
    justify-content: center;
    min-height: 34px;
    padding: 6px 4px;
    font-size: 0.78rem;
  }

  .header-controls {
    gap: 6px;
  }

  .language-switcher,
  .theme-switcher {
    gap: 2px;
    padding: 2px;
  }

  h1 {
    font-size: 3.35rem;
  }

  h2 {
    font-size: 2rem;
  }

  h3 {
    font-size: 1.18rem;
  }

  .intro,
  .about-copy {
    font-size: 1.08rem;
  }

  .hero-actions a,
  .contact-links a {
    width: 100%;
  }

  .section {
    padding: 54px 0;
  }

  .project-grid,
  .repo-grid {
    grid-template-columns: 1fr;
  }

  .portfolio-grid .featured-project {
    grid-column: auto;
  }

  .language-switcher button,
  .theme-switcher button {
    min-height: 30px;
    padding: 5px 6px;
    font-size: 0.76rem;
  }
}