:root {
  --bg: #0b0f14;
  --bg-soft: #111820;
  --panel: #131a22;
  --panel-2: #181f29;
  --card: #1a222d;
  --line: rgba(255, 255, 255, 0.09);
  --text: #edf3f9;
  --muted: #b6c2ce;
  --accent: #c8d6e5;
  --accent-strong: #f7f1e8;
  --shadow: rgba(5, 10, 14, 0.35);
  --button: #dfeaf5;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Inter", sans-serif;
  background: linear-gradient(180deg, #0a0c10 0%, #0d1218 100%);
  color: var(--text);
}

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

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

.page-shell {
  max-width: 1200px;
  margin: 0 auto;
  padding: 28px 24px 48px;
}

.site-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 0 20px;
  border-bottom: 1px solid var(--line);
}

.brand {
  font-size: 1.1rem;
  font-weight: 700;
  letter-spacing: 0.04em;
}

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

.top-nav a {
  color: var(--muted);
  font-size: 0.85rem;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  transition: color 0.2s ease;
}

.top-nav a:hover,
.top-nav a:focus-visible {
  color: var(--text);
}

.hero {
  padding: 64px 0 32px;
}

.hero__content {
  max-width: 950px;
  margin: 0 auto;
  text-align: center;
}

.eyebrow {
  display: inline-block;
  margin: 0 0 18px;
  padding: 8px 18px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.04);
  color: var(--text);
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.hero h1 {
  margin: 0;
  font-size: clamp(2.6rem, 5vw, 5rem);
  line-height: 1.05;
  letter-spacing: -0.06em;
  font-weight: 800;
}

.lead {
  max-width: 820px;
  margin: 24px auto 0;
  color: var(--muted);
  font-size: 1.2rem;
  line-height: 1.7;
}

.cta-row {
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
  margin-top: 28px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0.9rem 1.4rem;
  border-radius: 999px;
  font-weight: 600;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.btn:hover,
.btn:focus-visible {
  transform: translateY(-1px);
}

.btn-primary {
  background: var(--button);
  color: #111827;
  box-shadow: 0 10px 24px rgba(223, 234, 245, 0.18);
}

.btn-secondary {
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.02);
  color: var(--text);
}

.stack-row {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 14px;
  margin-top: 28px;
  color: var(--muted);
  flex-wrap: wrap;
}

.stack-row span {
  font-weight: 500;
}

.tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.tags span {
  padding: 0.5rem 0.8rem;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--line);
  color: var(--text);
  font-weight: 600;
}

.tags--light span {
  background: rgba(255, 255, 255, 0.02);
}

.smaller {
  margin-top: 16px;
}

.panel {
  padding: 52px 0 20px;
}

.section-heading {
  margin-bottom: 28px;
}

.section-heading.center {
  text-align: center;
}

.section-label {
  display: inline-block;
  margin-bottom: 8px;
  padding: 0.45rem 0.8rem;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--line);
  color: var(--text);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.section-heading h2 {
  margin: 0;
  font-size: clamp(2rem, 3vw, 3rem);
  letter-spacing: -0.05em;
  line-height: 1.1;
}

.about-grid {
  display: grid;
  grid-template-columns: 1.7fr 0.9fr;
  gap: 26px;
  align-items: start;
}

.about-grid p {
  color: var(--muted);
  font-size: 1.04rem;
  line-height: 1.8;
  margin: 0 0 1rem;
}

.meta-card {
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 22px 20px;
  box-shadow: 0 12px 30px var(--shadow);
}

.meta-card h3 {
  margin: 0 0 18px;
  font-size: 1.25rem;
}

.meta-card ul,
.skill-card ul,
.project-card ul {
  margin: 0;
  padding-left: 1.2rem;
  color: var(--muted);
  line-height: 1.7;
}

.meta-card li {
  margin-bottom: 8px;
}

.skills-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 24px;
}

.skill-card {
  background: rgba(255,255,255,0.02);
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 22px 20px;
}

.skill-card h3 {
  margin-top: 0;
  margin-bottom: 18px;
  font-size: 1.3rem;
}

.skill-card li {
  margin-bottom: 10px;
}

.project-card {
  margin-top: 28px;
  background: rgba(255,255,255,0.02);
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 28px 24px;
}

.project-card--alt {
  background: rgba(255,255,255,0.025);
}

.project-type {
  margin: 0 0 10px;
  color: var(--accent);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
}

.project-card h3 {
  margin: 0 0 14px;
  font-size: clamp(1.4rem, 2vw, 2.2rem);
}

.project-card p,
.project-card li,
.repo-intro,
.connect p,
.site-footer p {
  color: var(--muted);
  line-height: 1.7;
}

.inline-links {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-top: 18px;
}

.inline-links a,
.connect-links a,
.footer-links a,
.certificate-item a,
.repo-box a {
  color: var(--text);
  font-weight: 600;
  text-decoration: underline;
  text-underline-offset: 4px;
}

.principles-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
}

.principle {
  background: rgba(255,255,255,0.02);
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 22px 20px;
}

.principle span {
  display: inline-flex;
  width: 48px;
  height: 48px;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
  border-radius: 50%;
  background: rgba(255,255,255,0.04);
  color: var(--text);
  font-weight: 700;
}

.principle h3 {
  margin: 0 0 10px;
  font-size: 1.12rem;
}

.principle p {
  margin: 0;
  color: var(--muted);
  line-height: 1.7;
}

.learning-box {
  background: rgba(255,255,255,0.02);
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 28px 22px;
}

.learning-box p {
  margin-top: 0;
  font-size: 1.06rem;
  color: var(--muted);
}

.learning-flow {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 18px;
}

.learning-flow span {
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0.6rem 0.9rem;
  color: var(--text);
  font-size: 0.87rem;
}

.certificate-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.certificate-item {
  display: flex;
  flex-direction: column;
  gap: 8px;
  background: rgba(255,255,255,0.02);
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 20px 18px;
}

.certificate-item strong {
  font-size: 1.05rem;
}

.certificate-item span {
  color: var(--muted);
}

.certificate-modal {
  position: fixed;
  inset: 0;
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  padding: 24px;
}

.certificate-modal.is-open {
  display: flex;
}

.certificate-modal__backdrop {
  position: absolute;
  inset: 0;
  background: rgba(7, 11, 16, 0.72);
  backdrop-filter: blur(4px);
}

.certificate-modal__dialog {
  position: relative;
  width: min(92vw, 900px);
  max-height: 90vh;
  background: rgba(255,255,255,0.96);
  border: 1px solid rgba(17, 24, 39, 0.12);
  border-radius: 20px;
  box-shadow: 0 32px 60px rgba(15, 23, 42, 0.25);
  z-index: 1;
  padding: 18px;
}

.certificate-modal__content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
}

.certificate-modal__content h3 {
  margin: 0;
  font-size: 1.1rem;
  color: #111827;
}

.certificate-modal__content img {
  width: 100%;
  max-height: 75vh;
  object-fit: contain;
  border-radius: 12px;
  background: #f8fafc;
}

.certificate-modal__close {
  position: absolute;
  top: 12px;
  right: 12px;
  width: 38px;
  height: 38px;
  border: 1px solid rgba(15, 23, 42, 0.12);
  background: rgba(255,255,255,0.9);
  border-radius: 50%;
  color: #111827;
  font-size: 1.8rem;
  line-height: 1;
  cursor: pointer;
}

.repo-link-row {
  display: flex;
  justify-content: center;
  margin: 10px 0 22px;
}

.repo-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.repo-box {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 14px;
  min-height: 150px;
  background: rgba(255,255,255,0.02);
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 20px 18px;
}

.repo-box strong {
  font-size: 1.12rem;
}

.connect {
  text-align: center;
}

.connect-links {
  display: flex;
  justify-content: center;
  gap: 18px;
  flex-wrap: wrap;
  margin-top: 24px;
}

.site-footer {
  border-top: 1px solid var(--line);
  padding-top: 26px;
  margin-top: 26px;
}

.site-footer h3 {
  margin: 0;
  font-size: 1.4rem;
}

.footer-links {
  display: flex;
  gap: 18px;
  flex-wrap: wrap;
  margin-top: 16px;
  margin-bottom: 10px;
}

.copyright {
  margin-top: 12px;
  font-size: 0.9rem;
  color: var(--muted);
}

@media (max-width: 900px) {
  .about-grid,
  .skills-grid,
  .principles-grid,
  .certificate-list,
  .repo-grid {
    grid-template-columns: 1fr;
  }

  .site-header {
    flex-direction: column;
    gap: 16px;
    align-items: flex-start;
  }
}

@media (max-width: 560px) {
  .page-shell {
    padding-left: 16px;
    padding-right: 16px;
  }

  .top-nav {
    gap: 12px;
  }

  .hero {
    padding-top: 34px;
  }

  .cta-row,
  .connect-links,
  .inline-links {
    flex-direction: column;
  }

  .btn {
    width: 100%;
  }
}