:root {
  --bg: #111112;
  --surface: #171719;
  --surface-raised: #1d1e21;
  --line: #2c2d31;
  --text: #f0f0f1;
  --muted: #929399;
  --subtle: #66676e;
  --accent: #80bbff;
  --accent-soft: rgba(96, 163, 238, .12);
  --white-button: #f7f7f7;
  --button-text: #171719;
  color-scheme: dark;
}
html[data-theme="light"] {
  --bg: #fafafa;
  --surface: #fff;
  --surface-raised: #f1f3f5;
  --line: #e3e5e8;
  --text: #202126;
  --muted: #63666f;
  --subtle: #8b8f97;
  --accent: #1769bc;
  --accent-soft: rgba(23, 105, 188, .09);
  --white-button: #202126;
  --button-text: #fff;
  color-scheme: light;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--bg); color: var(--text); font-family: "DM Sans", Arial, sans-serif; -webkit-font-smoothing: antialiased; }
a { color: inherit; }
button { font: inherit; }
::selection { background: var(--accent); color: var(--bg); }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 4px; }

.site-header { position: sticky; top: 0; z-index: 10; border-bottom: 1px solid var(--line); background: color-mix(in srgb, var(--bg) 91%, transparent); backdrop-filter: blur(14px); }
.site-header__inner { width: min(768px, 100%); min-height: 64px; margin: auto; padding: 0 24px; display: flex; align-items: center; gap: 24px; }
.brand { font-size: 16px; font-weight: 700; letter-spacing: -.055em; text-decoration: none; margin-right: auto; }
.brand span { color: var(--accent); }
.site-nav, .site-actions { display: flex; align-items: center; gap: 19px; }
.site-nav a, .terminal-link { color: var(--muted); font-size: 12px; text-decoration: none; white-space: nowrap; transition: color .2s; }
.site-nav a:hover, .terminal-link:hover, .socials a:hover { color: var(--text); }
.site-actions { gap: 13px; padding-left: 17px; border-left: 1px solid var(--line); }
.terminal-link { display: inline-flex; align-items: center; gap: 7px; padding: 8px 11px; border: 1px solid color-mix(in srgb, var(--accent) 45%, var(--line)); border-radius: 7px; background: var(--accent-soft); color: var(--text); font-weight: 600; box-shadow: 0 0 0 1px color-mix(in srgb, var(--accent) 12%, transparent), 0 0 14px color-mix(in srgb, var(--accent) 24%, transparent); transition: border-color .2s, box-shadow .2s, transform .2s; }
.terminal-link:hover { border-color: var(--accent); box-shadow: 0 0 0 1px color-mix(in srgb, var(--accent) 28%, transparent), 0 0 22px color-mix(in srgb, var(--accent) 38%, transparent); transform: translateY(-1px); }
.terminal-link__icon { width: 15px; height: 15px; flex: none; color: var(--accent); }
.theme-toggle { width: 28px; height: 28px; display: grid; place-items: center; border: 0; padding: 0; background: transparent; color: var(--muted); cursor: pointer; }
.theme-toggle:hover { color: var(--text); }
.theme-toggle__icon { grid-area: 1 / 1; font-size: 17px; line-height: 1; }
.theme-toggle__icon:first-child { display: none; }
html[data-theme="light"] .theme-toggle__icon:first-child { display: block; }
html[data-theme="light"] .theme-toggle__icon:last-child { display: none; }

.site-main { width: min(768px, 100%); margin: 0 auto; padding: 0 24px 84px; }
.hero { padding: 62px 0 0; }
.identity { display: flex; align-items: center; gap: 19px; margin-bottom: 28px; }
.avatar { width: 112px; height: 112px; flex: none; overflow: hidden; border: 2px solid #555d68; border-radius: 50%; background: #192938; box-shadow: 0 0 0 2px rgba(255,255,255,.03); }
.avatar img { display: block; width: 100%; height: 100%; object-fit: cover; }
.identity__name-line { display: flex; align-items: center; gap: 10px; }
.identity h1 { margin: 0; font-size: 24px; font-weight: 700; letter-spacing: -.045em; }
.availability-dot, .status-light { display: inline-block; width: 9px; height: 9px; flex: none; border-radius: 50%; background: #6ec49c; box-shadow: 0 0 0 4px rgba(110,196,156,.12); }
.socials { display: flex; flex-wrap: wrap; gap: 13px; margin-top: 9px; }
.socials a { color: var(--muted); font-size: 12px; text-decoration: none; transition: color .2s; }
.hero__headline { max-width: 700px; margin: 0 0 19px; font-size: clamp(28px, 4vw, 38px); line-height: 1.2; font-weight: 500; letter-spacing: -.045em; }
.hero__headline span { color: var(--subtle); }
.hero__intro { max-width: 690px; margin: 0 0 26px; color: var(--muted); font-size: 15px; line-height: 2.05; }
.inline-tag { padding: 2px 6px; border: 1px dashed var(--line); border-radius: 5px; background: var(--surface); color: var(--text); font-size: 12px; white-space: nowrap; }
.button { display: inline-flex; align-items: center; justify-content: center; gap: 14px; min-height: 44px; padding: 0 20px; border: 1px solid transparent; border-radius: 7px; font-size: 13px; font-weight: 700; text-decoration: none; transition: transform .2s, background .2s, border-color .2s; }
.button:hover { transform: translateY(-2px); }
.button--primary { background: var(--white-button); color: var(--button-text); }
.button--secondary { background: transparent; color: var(--text); border-color: var(--line); }
.button--secondary:hover { border-color: var(--muted); }
.hero__status { display: flex; flex-wrap: wrap; align-items: center; gap: 10px; margin-top: 37px; padding: 16px 0; border-top: 1px solid var(--line); color: var(--muted); font-size: 12px; }
.hero__status .status-light { width: 7px; height: 7px; }
.hero__status strong { margin-left: auto; color: var(--text); font-weight: 500; }

.section { padding-top: 64px; scroll-margin-top: 80px; }
.section-heading { display: flex; align-items: baseline; justify-content: space-between; gap: 16px; margin-bottom: 21px; }
.section-heading h2 { margin: 0; font-size: 21px; font-weight: 500; letter-spacing: -.045em; }
.section-heading a, .section-heading > span { color: var(--muted); font-size: 12px; text-decoration: none; }
.section-heading a:hover { color: var(--text); }
.experience-list { border-top: 1px solid var(--line); }
.experience-item { display: grid; grid-template-columns: 120px minmax(0, 1fr); gap: 18px; padding: 19px 0; border-bottom: 1px solid var(--line); }
.experience-item time, .education-item time { color: var(--subtle); font-size: 12px; }
.experience-item h3, .education-item h3 { margin: 0 0 5px; font-size: 14px; font-weight: 600; }
.experience-item h3 span { color: var(--muted); font-weight: 400; }
.experience-item p, .education-item p { margin: 0; color: var(--muted); font-size: 12px; line-height: 1.6; }

.featured-grid { display: grid; grid-template-columns: 1.4fr 1fr; gap: 12px; }
.feature-card { display: flex; flex-direction: column; min-width: 0; overflow: hidden; border: 1px solid var(--line); border-radius: 10px; background: var(--surface); text-decoration: none; transition: border-color .2s, transform .2s; }
.feature-card:hover { transform: translateY(-3px); border-color: #536e89; }
.feature-card__visual { display: grid; place-items: center; height: 230px; overflow: hidden; background: #101923; }
.feature-card__image { display: block; width: 100%; height: 100%; object-fit: contain; }
.feature-card__caption { display: flex; flex-direction: column; flex: 1; padding: 17px 18px 20px; }
.feature-card__caption > span { color: var(--subtle); font: 9px "IBM Plex Mono", monospace; letter-spacing: .1em; }
.feature-card__caption h3 { margin: 9px 0 16px; font-size: 15px; font-weight: 600; line-height: 1.4; }
.feature-card__caption small { margin-top: auto; color: var(--accent); font-size: 11px; font-weight: 600; text-transform: uppercase; letter-spacing: .06em; }

.project-list { display: grid; gap: 13px; }
.project { display: flex; gap: 18px; padding: 18px; border: 1px dashed var(--line); border-radius: 10px; background: var(--surface); }
.project__icon { display: grid; place-items: center; flex: none; width: 40px; height: 40px; border: 1px solid var(--line); border-radius: 8px; background: var(--surface-raised); color: var(--accent); font: 12px "IBM Plex Mono", monospace; }
.project__body { min-width: 0; flex: 1; }
.project__top { display: flex; align-items: baseline; justify-content: space-between; gap: 12px; }
.project h3 { margin: 1px 0 8px; font-size: 15px; font-weight: 600; }
.project__top span { color: var(--subtle); font-size: 11px; white-space: nowrap; }
.project p { margin: 0; color: var(--muted); font-size: 13px; line-height: 1.65; }
.project__tags, .stack-tags { display: flex; flex-wrap: wrap; gap: 7px; padding: 0; list-style: none; }
.project__tags { margin: 14px 0; }
.project__tags li, .stack-tags li { padding: 6px 9px; border: 1px solid var(--line); border-radius: 5px; background: var(--surface-raised); color: var(--muted); font-size: 11px; }
.project .project__note { margin: 9px 0 0; color: var(--subtle); font-size: 11px; }
.project a { display: inline-block; margin-top: 14px; color: var(--accent); font-size: 12px; font-weight: 600; text-decoration: none; }
.project a:hover { text-decoration: underline; }
.project__links { display: flex; flex-wrap: wrap; gap: 2px 15px; }

.tech-marquee { position: relative; overflow: hidden; padding: 4px 0; mask-image: linear-gradient(to right, transparent, #000 7%, #000 93%, transparent); }
.tech-marquee + .tech-marquee { margin-top: 11px; }
.tech-track { display: flex; width: max-content; animation: tech-slide 36s linear infinite; }
.tech-marquee--reverse .tech-track { animation-direction: reverse; animation-duration: 43s; }
.tech-marquee:hover .tech-track, .tech-marquee:focus-within .tech-track { animation-play-state: paused; }
.tech-set { display: flex; gap: 10px; padding-right: 10px; }
.tech-chip { display: inline-flex; align-items: center; flex: none; gap: 9px; min-height: 42px; padding: 8px 12px; border: 1px dashed var(--line); border-radius: 7px; background: var(--surface); color: var(--text); font-size: 12px; white-space: nowrap; }
.tech-chip img { display: block; width: 21px; height: 21px; object-fit: contain; }
.tech-chip__fallback { display: none; width: 21px; height: 21px; place-items: center; border-radius: 4px; background: var(--accent-soft); color: var(--accent); font: 10px "IBM Plex Mono", monospace; }
.tech-chip--fallback img { display: none; }
.tech-chip--fallback .tech-chip__fallback { display: grid; }
@keyframes tech-slide { to { transform: translateX(-50%); } }
.certificate-list { display: grid; gap: 12px; }
.certificate { display: flex; align-items: center; gap: 18px; padding: 19px; border: 1px solid var(--line); border-radius: 9px; background: var(--surface); }
.certificate__issuer { display: grid; place-items: center; flex: none; width: 66px; height: 62px; border-radius: 7px; background: var(--surface-raised); font-weight: 700; letter-spacing: -.04em; }
.certificate__issuer--cisco { color: #25a8e0; font-size: 14px; }
.certificate__issuer--ine { color: #ed594d; font-size: 19px; letter-spacing: .01em; }
.certificate__issuer img { display: block; max-width: 48px; max-height: 57px; object-fit: contain; }
.certificate__issuer img[hidden] { display: none; }
.certificate--document { display: block; }
.certificate__summary { display: flex; align-items: center; gap: 18px; }
.certificate__document-link { display: block; margin-top: 22px; overflow: hidden; border: 1px solid var(--line); border-radius: 7px; background: #fff; }
.certificate__document-image { display: block; width: 100%; height: auto; }
.certificate__document-link:hover { border-color: var(--accent); }

.certificate h3 { margin: 8px 0 4px; font-size: 15px; font-weight: 600; }
.certificate p { margin: 0; color: var(--muted); font-size: 12px; }
.highlights-grid { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 12px; }
.highlight { padding: 21px; border: 1px solid var(--line); border-radius: 9px; background: var(--surface); }
.highlight__number { color: var(--accent); font-size: 30px; font-weight: 600; letter-spacing: -.055em; }
.highlight h3 { margin: 8px 0 6px; font-size: 13px; }
.highlight p { margin: 0; color: var(--muted); font-size: 12px; line-height: 1.6; }
.focus { display: flex; justify-content: space-between; gap: 20px; margin-top: 13px; padding: 22px; border: 1px solid #3a5368; border-radius: 9px; background: linear-gradient(130deg, #172332, #15191f); }
.eyebrow { color: var(--accent); font: 10px "IBM Plex Mono", monospace; letter-spacing: .1em; }
.focus h3 { margin: 9px 0 7px; color: #f2f6f9; font-size: 15px; }
.focus p { max-width: 570px; margin: 0; color: #a9b7c5; font-size: 12px; line-height: 1.6; }
.focus__arrow { color: #8bb5d7; font-size: 20px; }
.education-item { display: grid; grid-template-columns: 120px minmax(0, 1fr); gap: 18px; padding: 18px 0; border-top: 1px solid var(--line); }
.education-item:last-child { border-bottom: 1px solid var(--line); }
.about > p { max-width: 680px; margin: 0; color: var(--muted); font-size: 14px; line-height: 1.8; }

.github-activity { padding: 23px 24px 20px; border: 1px dashed var(--line); border-radius: 10px; background: var(--surface); }
.github-activity__scroll { max-width: 100%; overflow-x: auto; overflow-y: hidden; padding-bottom: 5px; scrollbar-width: none; }
.github-activity__scroll::-webkit-scrollbar { display: none; }
.github-activity__months, .github-activity__grid { position: relative; width: 636px; }
.github-activity__months { height: 23px; color: var(--muted); font: 10px "IBM Plex Mono", monospace; }
.github-activity__months span { position: absolute; top: 0; white-space: nowrap; }
.github-activity__grid { display: flex; gap: 3px; }
.github-activity__week { display: flex; flex: none; flex-direction: column; gap: 3px; }
.github-activity__day { width: 9px; height: 9px; border-radius: 2px; background: var(--heat-empty, #252a2f); }
.github-activity__day[data-level="1"] { background: #0e4429; }
.github-activity__day[data-level="2"] { background: #006d32; }
.github-activity__day[data-level="3"] { background: #26a641; }
.github-activity__day[data-level="4"] { background: #39d353; }
.github-activity__day--outside { visibility: hidden; }
.github-activity__footer { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 6px 15px; margin-top: 17px; color: var(--muted); font-size: 11px; }
.github-activity__footer strong { color: var(--text); font-weight: 600; }
html[data-theme="light"] .github-activity__day { --heat-empty: #ebedf0; }

.contact { margin-top: 68px; padding: 35px; border: 1px solid var(--line); border-radius: 11px; background: var(--surface); scroll-margin-top: 80px; }
.contact h2 { margin: 13px 0 12px; font-size: clamp(26px, 4vw, 34px); font-weight: 500; letter-spacing: -.05em; }
.contact > p { max-width: 550px; margin: 0; color: var(--muted); font-size: 14px; line-height: 1.7; }
.contact__actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 25px; }
.contact__profiles { display: flex; flex-wrap: wrap; gap: 18px; margin-top: 25px; padding-top: 20px; border-top: 1px solid var(--line); }
.contact__profiles a { color: var(--muted); font-size: 12px; text-decoration: none; }
.contact__profiles a:hover { color: var(--text); }
.site-footer { display: flex; justify-content: space-between; gap: 20px; width: min(768px, 100%); margin: 0 auto; padding: 25px 24px 40px; border-top: 1px solid var(--line); color: var(--subtle); font-size: 11px; }
.site-footer a { color: var(--muted); text-decoration: none; }
.site-footer a:hover { color: var(--text); }

@media (max-width: 620px) {
  .site-header__inner { min-height: 57px; padding: 0 16px; gap: 13px; }
  .site-nav { gap: 12px; }
  .site-actions { gap: 8px; padding-left: 11px; }
  .site-nav a, .terminal-link { font-size: 11px; }
  .site-main { padding: 0 16px 64px; }
  .hero { padding-top: 53px; }
  .section { padding-top: 55px; }
  .feature-card__visual { height: 205px; }
}
@media (max-width: 520px) {
  .site-nav a:last-child { display: none; }
  .terminal-link { font-size: 11px; }
  .terminal-link span { font-size: 11px; }
  .avatar { width: 102px; height: 102px; }
  .identity h1 { font-size: 22px; }
  .hero__status strong { width: 100%; margin: 0 0 0 17px; }
  .featured-grid, .highlights-grid { grid-template-columns: 1fr; }
  .feature-card__visual { height: 225px; }
  .project__top { display: block; }
  .project__top span { display: block; margin-bottom: 9px; }
}
@media (max-width: 390px) {
  .site-nav a:nth-child(2) { display: none; }
  .experience-item, .education-item { grid-template-columns: 1fr; gap: 6px; }
  .contact { padding: 25px; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: .01ms !important; animation-duration: .01ms !important; }
}

@media (prefers-reduced-motion: reduce) {
  .tech-track { animation: none; }
  .tech-marquee { overflow-x: auto; mask-image: none; }
  .tech-set[aria-hidden="true"] { display: none; }
}

@media (max-width: 520px) {
  .github-activity { padding: 20px 17px; }
}