:root {
  --bg: #fcfbf9;
  --surface: #ffffff;
  --border: #e6e2db;
  --border-subtle: #f0ede8;
  --text: #1a1816;
  --text-muted: #524d45;
  --text-sub: #8c867c;
  --accent: #1d4ed8;
  --tag-bg: #eff4fe;
  --tag-text: #1e40af;

  --font-mono: "SF Mono", Menlo, Consolas, Monaco, monospace;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --max-width: 1180px;
}

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

html {
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

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

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 36px;
  width: 100%;
}

.header {
  position: sticky;
  top: 0;
  background: rgba(252, 251, 249, 0.94);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
  z-index: 50;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 60px;
}

.brand {
  font-weight: 600;
  font-size: 1rem;
  letter-spacing: -0.01em;
}

.nav {
  display: flex;
  align-items: center;
  gap: 24px;
}

.nav a {
  font-size: 0.92rem;
  color: var(--text-muted);
}

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

.lang-btn {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  font-weight: 600;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 4px 10px;
  cursor: pointer;
  color: var(--text);
}

.lang-btn:hover {
  border-color: var(--text);
}

.hero {
  padding: 96px 0 68px;
  max-width: 880px;
}

.meta-tag {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--accent);
  margin-bottom: 16px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-weight: 600;
}

.hero-name {
  font-size: clamp(2.4rem, 5.2vw, 3.8rem);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -0.035em;
  color: var(--text);
  margin-bottom: 14px;
}

.hero-tagline {
  font-size: clamp(1.4rem, 2.6vw, 1.85rem);
  font-weight: 500;
  line-height: 1.25;
  letter-spacing: -0.02em;
  color: var(--text-muted);
  margin-bottom: 22px;
}

.hero-lead {
  font-size: 1.15rem;
  color: var(--text-muted);
  line-height: 1.65;
}

.section {
  padding: 72px 0;
  border-top: 1px solid var(--border);
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 48px;
}

.section-sidebar {
  padding-top: 4px;
}

.section-title {
  font-size: 1.25rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--text);
}

.section-content {
  min-width: 0;
}

.about-layout {
  display: grid;
  grid-template-columns: 1.35fr 1fr;
  gap: 48px;
}

.about-bio p {
  color: var(--text-muted);
  font-size: 1.04rem;
  line-height: 1.7;
  margin-bottom: 18px;
}

.about-meta-list {
  display: flex;
  flex-direction: column;
  gap: 24px;
  border-left: 1px solid var(--border);
  padding-left: 32px;
}

.meta-item {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.meta-label {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-sub);
}

.meta-value {
  font-size: 0.96rem;
  color: var(--text);
}

.project-list {
  display: flex;
  flex-direction: column;
}

.project-item {
  padding: 36px 0;
  border-bottom: 1px solid var(--border-subtle);
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.project-item:first-child {
  padding-top: 0;
}

.project-item:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.project-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}

.project-headline {
  display: flex;
  align-items: baseline;
  gap: 14px;
  flex-wrap: wrap;
}

.project-name {
  font-size: 1.3rem;
  font-weight: 600;
  letter-spacing: -0.015em;
}

.project-sub {
  font-weight: 400;
  color: var(--text-muted);
  font-size: 1.05rem;
}

.project-tag {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--tag-text);
  background: var(--tag-bg);
  padding: 3px 8px;
  border-radius: 3px;
}

.project-links {
  display: flex;
  gap: 18px;
}

.project-links a {
  font-family: var(--font-mono);
  font-size: 0.84rem;
  font-weight: 600;
  color: var(--accent);
}

.project-links a:hover {
  text-decoration: underline;
}

.project-desc {
  font-size: 1.04rem;
  color: var(--text);
  line-height: 1.6;
  max-width: 860px;
}

.project-specs {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 40px;
  margin-top: 6px;
}

.spec-block {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.spec-label {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-sub);
  font-weight: 600;
}

.spec-block p {
  font-size: 0.94rem;
  color: var(--text-muted);
  line-height: 1.55;
}

.tag-row {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
}

.tag-row span {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  color: var(--tag-text);
  background: var(--tag-bg);
  padding: 3px 8px;
  border-radius: 3px;
}

.skills-ledger {
  display: flex;
  flex-direction: column;
}

.skill-row {
  display: grid;
  grid-template-columns: 200px 1fr;
  padding: 18px 0;
  border-bottom: 1px solid var(--border-subtle);
  font-size: 0.96rem;
  align-items: baseline;
}

.skill-row:first-child {
  padding-top: 0;
}

.skill-row:last-child {
  border-bottom: none;
}

.skill-cat {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-sub);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.skill-items {
  color: var(--text);
  line-height: 1.55;
}

.contact-box {
  max-width: 640px;
}

.contact-intro {
  font-size: 1.08rem;
  color: var(--text-muted);
  margin-bottom: 24px;
  line-height: 1.6;
}

.contact-methods {
  display: flex;
  flex-direction: column;
}

.contact-entry {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 0;
  border-bottom: 1px solid var(--border-subtle);
  transition: padding-left 0.15s ease;
}

.contact-entry:first-child {
  border-top: 1px solid var(--border-subtle);
}

.contact-entry:hover {
  padding-left: 6px;
}

.contact-entry-label {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-sub);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.contact-entry-val {
  font-size: 0.96rem;
  font-weight: 500;
  color: var(--text);
}

.cv-layout {
  padding-top: 40px;
  padding-bottom: 60px;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.cv-toolbar {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  margin-bottom: 24px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border);
  flex-wrap: wrap;
  gap: 16px;
}

.cv-title {
  font-size: clamp(1.8rem, 3vw, 2.4rem);
  font-weight: 700;
  letter-spacing: -0.025em;
}

.cv-subtitle {
  font-size: 0.96rem;
  color: var(--text-muted);
  margin-top: 4px;
}

.cv-actions {
  display: flex;
  gap: 10px;
}

.btn-cv {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--surface);
  background: var(--text);
  padding: 8px 16px;
  border-radius: 4px;
  display: inline-flex;
  align-items: center;
}

.btn-cv-secondary {
  background: var(--tag-bg);
  color: var(--tag-text);
}

.btn-cv-secondary:hover {
  background: #e2ecfd;
}

.cv-viewer {
  width: 100%;
  height: calc(100vh - 220px);
  min-height: 700px;
  border: 1px solid var(--border);
  border-radius: 6px;
  overflow: hidden;
  background: #525659;
  position: relative;
}

.cv-iframe {
  width: 100%;
  height: 100%;
  border: none;
  display: block;
}

.cv-mobile-fallback {
  display: none;
}

.footer {
  margin-top: auto;
  border-top: 1px solid var(--border);
  padding: 40px 0;
  font-size: 0.84rem;
  color: var(--text-sub);
}

.footer-inner {
  display: flex;
  justify-content: space-between;
}

@media (max-width: 900px) {
  .section {
    grid-template-columns: 1fr;
    gap: 24px;
  }
  .about-layout {
    grid-template-columns: 1fr;
    gap: 28px;
  }
  .about-meta-list {
    border-left: none;
    border-top: 1px solid var(--border);
    padding-left: 0;
    padding-top: 20px;
  }
  .project-specs {
    grid-template-columns: 1fr;
    gap: 16px;
  }
  .cv-viewer {
    min-height: 580px;
  }
}

@media (max-width: 640px) {
  .container {
    padding: 0 20px;
  }
  .header-inner {
    height: auto;
    padding: 14px 0;
    flex-direction: column;
    align-items: flex-start;
    gap: 14px;
  }
  .nav {
    width: 100%;
    justify-content: space-between;
    gap: 10px;
    flex-wrap: wrap;
  }
  .hero {
    padding: 48px 0 40px;
  }
  .skill-row {
    grid-template-columns: 1fr;
    gap: 6px;
  }
  .cv-toolbar {
    flex-direction: column;
    align-items: flex-start;
  }
  .cv-viewer {
    height: auto;
    min-height: auto;
    background: transparent;
    border: none;
  }
  .cv-iframe {
    display: none;
  }
  .cv-mobile-fallback {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    gap: 16px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 36px 20px;
  }
  .cv-mobile-fallback p {
    font-size: 0.94rem;
    color: var(--text-muted);
  }
  .footer-inner {
    flex-direction: column;
    gap: 8px;
  }
}