:root {
  --color-bg: #f7f8f6;
  --color-surface: #ffffff;
  --color-alt: #eef3f1;
  --color-text: #17211f;
  --color-muted: #5d6a66;
  --color-line: #d8dfdb;
  --color-primary: #1f5b4d;
  --color-primary-dark: #153f36;
  --color-accent: #f2c94c;
  --color-ink: #101817;
  --shadow-soft: 0 18px 44px rgba(28, 45, 41, 0.08);
  --radius-card: 8px;
  --content-width: 1160px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 86px;
}

body {
  margin: 0;
  background: var(--color-bg);
  color: var(--color-text);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 16px;
  line-height: 1.6;
}

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

a {
  color: inherit;
}

a:focus-visible,
button:focus-visible {
  outline: 3px solid var(--color-accent);
  outline-offset: 3px;
}

.skip-link {
  position: fixed;
  top: 12px;
  left: 12px;
  z-index: 100;
  transform: translateY(-160%);
  background: var(--color-ink);
  color: #ffffff;
  padding: 0.65rem 0.85rem;
  border-radius: 6px;
}

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

.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;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(247, 248, 246, 0.94);
  border-bottom: 1px solid var(--color-line);
  backdrop-filter: blur(14px);
}

.nav {
  width: min(100% - 32px, var(--content-width));
  min-height: 72px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.nav-brand {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  font-weight: 800;
  text-decoration: none;
}

.brand-mark {
  display: inline-grid;
  place-items: center;
  width: 42px;
  height: 42px;
  border: 2px solid var(--color-primary);
  background: var(--color-accent);
  color: var(--color-ink);
  border-radius: 8px;
  font-size: 0.9rem;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.nav-links a {
  display: inline-flex;
  min-height: 42px;
  align-items: center;
  padding: 0 0.72rem;
  border-radius: 6px;
  color: var(--color-muted);
  font-size: 0.88rem;
  font-weight: 700;
  text-decoration: none;
  text-transform: uppercase;
}

.nav-links a:hover {
  background: var(--color-alt);
  color: var(--color-text);
}

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border: 1px solid var(--color-line);
  background: var(--color-surface);
  border-radius: 8px;
  cursor: pointer;
}

.nav-toggle-icon,
.nav-toggle-icon::before,
.nav-toggle-icon::after {
  display: block;
  width: 20px;
  height: 2px;
  margin: 0 auto;
  background: var(--color-text);
  content: "";
}

.nav-toggle-icon::before {
  transform: translateY(-7px);
}

.nav-toggle-icon::after {
  transform: translateY(5px);
}

.section-band {
  padding: 88px 0;
  background: var(--color-bg);
}

.alt-band {
  background: var(--color-alt);
}

.section-inner {
  width: min(100% - 32px, var(--content-width));
  margin: 0 auto;
}

.section-heading {
  max-width: 760px;
  margin-bottom: 2rem;
}

.section-heading h2,
.contact-layout h2 {
  margin: 0;
  color: var(--color-ink);
  font-size: clamp(2rem, 4vw, 3.2rem);
  line-height: 1.08;
}

.section-copy,
.lead-text {
  color: var(--color-muted);
  font-size: 1.12rem;
}

.eyebrow {
  margin: 0 0 0.7rem;
  color: var(--color-primary);
  font-size: 0.78rem;
  font-weight: 800;
  text-transform: uppercase;
}

.hero {
  min-height: calc(100vh - 72px);
  display: flex;
  align-items: center;
  border-bottom: 1px solid var(--color-line);
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(300px, 0.85fr);
  align-items: center;
  gap: clamp(2rem, 6vw, 5rem);
}

.hero-content h1 {
  margin: 0;
  color: var(--color-ink);
  font-size: clamp(3.1rem, 8vw, 6.6rem);
  line-height: 0.95;
}

.hero-title {
  max-width: 760px;
  margin: 1.35rem 0 0;
  color: var(--color-primary-dark);
  font-size: clamp(1.2rem, 3vw, 1.65rem);
  font-weight: 750;
  line-height: 1.35;
}

.hero-summary {
  max-width: 720px;
  margin: 1.35rem 0 0;
  color: var(--color-muted);
  font-size: 1.12rem;
}

.hero-actions,
.contact-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
  margin-top: 2rem;
}

.button {
  display: inline-flex;
  min-height: 48px;
  align-items: center;
  justify-content: center;
  padding: 0.8rem 1.05rem;
  border: 1px solid transparent;
  border-radius: 8px;
  font-weight: 800;
  text-decoration: none;
  text-transform: uppercase;
}

.button-primary {
  background: var(--color-primary);
  color: #ffffff;
}

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

.button-secondary {
  border-color: var(--color-primary);
  background: var(--color-surface);
  color: var(--color-primary);
}

.button-secondary:hover {
  background: #e5efeb;
}

.button-ghost {
  border-color: var(--color-line);
  background: transparent;
  color: var(--color-text);
}

.button-ghost:hover {
  background: var(--color-surface);
}

.profile-panel {
  background: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-soft);
  overflow: hidden;
}

.profile-visual {
  aspect-ratio: 4 / 3;
  background: var(--color-ink);
}

.profile-visual img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.profile-facts {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  background: var(--color-line);
}

.profile-facts span {
  min-height: 76px;
  display: grid;
  place-items: center;
  padding: 1rem;
  background: var(--color-surface);
  color: var(--color-text);
  font-weight: 800;
  text-align: center;
}

.about-layout {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  gap: 2rem;
}

.principles-grid,
.cards-grid,
.skills-grid,
.project-grid {
  display: grid;
  gap: 1rem;
}

.principles-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.cards-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

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

.project-grid {
  grid-template-columns: minmax(0, 1.4fr) minmax(260px, 0.6fr);
}

.info-card,
.skill-card,
.project-card,
.roadmap-panel,
.timeline-card {
  background: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-card);
}

.info-card,
.skill-card,
.project-card,
.roadmap-panel {
  padding: 1.35rem;
}

.info-card h3,
.skill-card h3,
.project-card h3,
.roadmap-panel h3 {
  margin: 0 0 0.55rem;
  color: var(--color-ink);
  font-size: 1.05rem;
  line-height: 1.35;
}

.info-card p,
.skill-card p,
.project-card p,
.roadmap-panel p {
  margin: 0;
  color: var(--color-muted);
}

.compact-card {
  min-height: 128px;
}

.card-meta,
.timeline-meta,
.company {
  color: var(--color-primary);
  font-size: 0.86rem;
  font-weight: 800;
  text-transform: uppercase;
}

.timeline {
  display: grid;
  gap: 1rem;
}

.timeline-card {
  display: grid;
  grid-template-columns: 240px minmax(0, 1fr);
  gap: 1.25rem;
  padding: 1.35rem;
}

.timeline-meta {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.timeline-content h3 {
  margin: 0;
  color: var(--color-ink);
}

.timeline-content p {
  margin: 0.45rem 0 0;
  color: var(--color-muted);
}

.compact-list {
  margin: 0.85rem 0 0;
  padding-left: 1.1rem;
  color: var(--color-muted);
}

.compact-list li + li {
  margin-top: 0.35rem;
}

.skill-heading {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1rem;
}

.level-pill {
  flex: 0 0 auto;
  padding: 0.26rem 0.55rem;
  border: 1px solid var(--color-line);
  border-radius: 999px;
  background: var(--color-bg);
  color: var(--color-text);
  font-size: 0.75rem;
  font-weight: 800;
}

.level-current {
  border-color: #6fa78e;
  background: #e3f0ea;
}

.level-learning {
  border-color: #d8b84d;
  background: #fff4cb;
}

.level-planned {
  border-color: #9aa4ad;
  background: #edf0f2;
}

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

.tag-list li {
  padding: 0.45rem 0.62rem;
  border: 1px solid var(--color-line);
  border-radius: 999px;
  background: var(--color-bg);
  color: var(--color-muted);
  font-size: 0.9rem;
  font-weight: 650;
}

.project-card:first-child {
  border-top: 5px solid var(--color-accent);
}

.project-header {
  margin-bottom: 1rem;
}

.architecture-chain,
.flow-list {
  margin: 1.3rem 0;
  padding: 0;
  list-style: none;
}

.architecture-chain li,
.flow-list li {
  position: relative;
  min-height: 44px;
  display: grid;
  place-items: center;
  margin-bottom: 1rem;
  padding: 0.7rem;
  border: 1px solid var(--color-line);
  border-radius: 8px;
  background: #f9fbfa;
  color: var(--color-ink);
  font-weight: 800;
  text-align: center;
}

.architecture-chain li:not(:last-child)::after,
.flow-list li:not(:last-child)::after {
  position: absolute;
  bottom: -1.05rem;
  left: 50%;
  transform: translateX(-50%);
  color: var(--color-primary);
  content: "v";
  font-weight: 900;
}

.project-philosophy {
  margin-top: 1rem !important;
  padding-top: 1rem;
  border-top: 1px solid var(--color-line);
  color: var(--color-text) !important;
  font-weight: 700;
}

.philosophy-layout {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(280px, 0.55fr);
  align-items: start;
  gap: 2rem;
}

.cert-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 330px;
  gap: 1rem;
}

.contact-band {
  background: var(--color-ink);
  color: #ffffff;
}

.contact-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(280px, 0.5fr);
  align-items: center;
  gap: 2rem;
}

.contact-layout h2 {
  color: #ffffff;
}

.contact-layout p {
  max-width: 720px;
  color: #d5dfdc;
}

.contact-layout .eyebrow,
.location {
  color: var(--color-accent);
}

.contact-actions {
  justify-content: flex-end;
}

.site-footer {
  padding: 1.2rem;
  border-top: 1px solid #293431;
  background: var(--color-ink);
  color: #d5dfdc;
  text-align: center;
}

.site-footer p {
  margin: 0;
}

@media (max-width: 980px) {
  .nav-toggle {
    display: inline-grid;
    place-items: center;
  }

  .nav-links {
    position: absolute;
    top: 72px;
    right: 16px;
    left: 16px;
    display: none;
    flex-direction: column;
    align-items: stretch;
    padding: 0.65rem;
    border: 1px solid var(--color-line);
    border-radius: var(--radius-card);
    background: var(--color-surface);
    box-shadow: var(--shadow-soft);
  }

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

  .nav-links a {
    justify-content: center;
  }

  .hero-grid,
  .about-layout,
  .philosophy-layout,
  .cert-layout,
  .contact-layout {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
  }

  .principles-grid,
  .cards-grid,
  .skills-grid,
  .project-grid {
    grid-template-columns: 1fr;
  }

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

@media (max-width: 680px) {
  html {
    scroll-padding-top: 72px;
  }

  .nav {
    width: min(100% - 24px, var(--content-width));
  }

  .nav-brand span:last-child {
    max-width: 180px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }

  .section-band {
    padding: 64px 0;
  }

  .section-inner {
    width: min(100% - 24px, var(--content-width));
  }

  .hero-content h1 {
    font-size: clamp(2.7rem, 16vw, 4rem);
  }

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

  .button {
    width: 100%;
  }

  .profile-facts {
    grid-template-columns: 1fr;
  }

  .profile-facts span {
    min-height: 58px;
  }

  .timeline-card {
    grid-template-columns: 1fr;
  }

  .skill-heading {
    flex-direction: column;
  }
}