:root {
  color-scheme: dark;
  --bg: #0b0d0f;
  --surface: #111417;
  --surface-strong: #171b1f;
  --text: #f2f2ee;
  --muted: #9ca3a8;
  --line: #2a3035;
  --accent: #ff6b2c;
  --accent-soft: rgba(255, 107, 44, .14);
  --header-bg: rgba(11, 13, 15, .82);
  --shadow: 0 24px 80px rgba(0, 0, 0, .35);
  --max-width: 1240px;
}

[data-theme="light"] {
  color-scheme: light;
  --bg: #f3f3ef;
  --surface: #e9e9e3;
  --surface-strong: #fff;
  --text: #111417;
  --muted: #60676c;
  --line: #cfd2ce;
  --accent: #d94b12;
  --accent-soft: rgba(217, 75, 18, .1);
  --header-bg: rgba(243, 243, 239, .86);
  --shadow: 0 24px 70px rgba(31, 37, 41, .12);
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 6rem; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: "Aptos", "Segoe UI Variable", "Segoe UI", system-ui, sans-serif;
  line-height: 1.7;
  transition: background-color .25s ease, color .25s ease;
}
body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  opacity: .32;
  background-image: linear-gradient(var(--line) 1px, transparent 1px), linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 72px 72px;
  mask-image: linear-gradient(to bottom, black, transparent 70%);
  z-index: -1;
}
img { max-width: 100%; display: block; }
a { color: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
button { font: inherit; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 4px; }

.sr-only, .skip-link:not(:focus) {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}
.skip-link { position: fixed; top: 1rem; left: 1rem; z-index: 100; background: var(--accent); color: #0b0d0f; padding: .7rem 1rem; }
.section-shell { width: min(calc(100% - 3rem), var(--max-width)); margin-inline: auto; }
.section-block { padding-block: clamp(5rem, 10vw, 9rem); border-top: 1px solid var(--line); }

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  min-height: 76px;
  padding: 0 max(1.5rem, calc((100vw - var(--max-width)) / 2));
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 2rem;
  background: var(--header-bg);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(18px);
}
.wordmark { font: 500 1.15rem "Cascadia Code", "SFMono-Regular", Consolas, monospace; text-decoration: none; justify-self: start; }
.wordmark-dot, .accent-text, .code-card b { color: var(--accent); }
.main-navigation { display: flex; gap: clamp(1.3rem, 3vw, 2.8rem); }
.main-navigation a, .text-button, .icon-button {
  color: var(--muted);
  background: none;
  border: 0;
  text-decoration: none;
  font: 500 .77rem "Cascadia Code", "SFMono-Regular", Consolas, monospace;
  text-transform: uppercase;
  letter-spacing: .08em;
  cursor: pointer;
}
.main-navigation a:hover, .text-button:hover, .icon-button:hover { color: var(--text); }
.header-actions { display: flex; align-items: center; justify-content: end; gap: .35rem; }
.header-actions button { min-width: 42px; min-height: 42px; }
.icon-button { font-size: 1.2rem; }
.menu-toggle { display: none; }

.hero {
  min-height: calc(100vh - 76px);
  padding-block: clamp(4rem, 8vw, 7rem);
  display: grid;
  grid-template-columns: minmax(0, 1.14fr) minmax(320px, .86fr);
  gap: clamp(3rem, 7vw, 7rem);
  align-items: center;
}
.eyebrow, .section-index, .skill-state, .image-caption {
  margin: 0 0 1.4rem;
  color: var(--muted);
  font: 500 .74rem "Cascadia Code", "SFMono-Regular", Consolas, monospace;
  text-transform: uppercase;
  letter-spacing: .12em;
}
.status-dot { display: inline-block; width: 8px; height: 8px; margin-right: .65rem; background: var(--accent); border-radius: 50%; box-shadow: 0 0 18px var(--accent); }
h1, h2, h3, p { margin-top: 0; }
h1, h2 { letter-spacing: -.055em; line-height: 1.03; }
h1 { max-width: 870px; margin-bottom: 1.7rem; font-size: clamp(3rem, 7vw, 6.8rem); font-weight: 600; }
h2 { font-size: clamp(2.4rem, 5vw, 4.8rem); font-weight: 600; }
h3 { line-height: 1.25; }
.hero-intro { max-width: 690px; color: var(--muted); font-size: clamp(1rem, 1.4vw, 1.2rem); }
.hero-actions { display: flex; flex-wrap: wrap; gap: .8rem; margin-top: 2.2rem; }
.button { display: inline-flex; align-items: center; justify-content: center; min-height: 52px; padding: .8rem 1.25rem; border: 1px solid var(--line); text-decoration: none; font-weight: 600; transition: transform .2s ease, background-color .2s ease; }
.button:hover { transform: translateY(-2px); }
.button-primary { background: var(--accent); border-color: var(--accent); color: #0b0d0f; }
.button-secondary { background: var(--surface); }
.hero-visual { position: relative; max-width: 540px; justify-self: end; }
.profile-frame { position: relative; border: 1px solid var(--line); padding: .7rem; background: var(--surface); box-shadow: var(--shadow); }
.profile-frame img { width: 100%; height: clamp(360px, 29vw, 500px); object-fit: cover; object-position: center 68%; filter: saturate(.72) contrast(1.03); }
.profile-label { position: static; margin-top: .7rem; padding: .8rem 1rem; display: flex; align-items: baseline; justify-content: space-between; gap: 1rem; background: var(--surface-strong); border: 1px solid var(--line); color: var(--text); }
.profile-label span, .profile-label small { display: block; }
.profile-label small { color: #aeb4b8; }
.code-card { position: absolute; right: 0; top: -2rem; width: 220px; padding: 1rem; display: grid; background: var(--surface-strong); border: 1px solid var(--line); box-shadow: var(--shadow); font: .73rem/1.7 "Cascadia Code", "SFMono-Regular", Consolas, monospace; }
.code-comment { color: var(--muted); }

.section-heading { display: grid; grid-template-columns: 1.25fr .75fr; gap: 3rem; margin-bottom: clamp(3rem, 6vw, 5rem); align-items: end; }
.section-heading h2 { margin-bottom: 0; }
.section-heading > p { color: var(--muted); max-width: 520px; margin-bottom: .35rem; }
.project-grid { display: grid; grid-template-columns: repeat(12, 1fr); gap: 1.25rem; }
.project-card { grid-column: span 4; position: relative; min-height: 460px; padding: clamp(1.5rem, 2.5vw, 2.4rem); display: flex; flex-direction: column; background: var(--surface); border: 1px solid var(--line); overflow: hidden; text-decoration: none; transition: border-color .25s ease, transform .25s ease; }
.project-card:hover { border-color: var(--accent); transform: translateY(-5px); }
.project-meta { display: flex; justify-content: space-between; gap: 1rem; color: var(--muted); font: .72rem "Cascadia Code", "SFMono-Regular", Consolas, monospace; text-transform: uppercase; letter-spacing: .08em; }
.project-card h3 { margin: auto 0 1rem; font-size: clamp(1.8rem, 3vw, 3rem); letter-spacing: -.04em; }
.project-card p { color: var(--muted); max-width: 580px; }
.project-tags { display: flex; flex-wrap: wrap; gap: .45rem; padding: 0; margin: 1.2rem 0 0; list-style: none; }
.project-tags li, .personal-tags li { padding: .35rem .65rem; border: 1px solid var(--line); color: var(--muted); font: .68rem "Cascadia Code", "SFMono-Regular", Consolas, monospace; text-transform: uppercase; letter-spacing: .06em; }
.project-arrow { position: absolute; right: 1.6rem; bottom: 1.4rem; color: var(--accent); font-size: 1.5rem; }
.project-status { color: var(--accent); }

.skills-layout { display: grid; grid-template-columns: repeat(2, 1fr); border: 1px solid var(--line); }
.skill-feature, .skill-card { min-height: 250px; padding: clamp(1.5rem, 3vw, 2.5rem); background: var(--surface); border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.skill-feature { grid-row: span 2; min-height: 500px; display: flex; flex-direction: column; background: var(--accent); color: #0b0d0f; }
.skill-feature .skill-state, .skill-feature p { color: rgba(11,13,15,.7); }
.skill-feature h3 { margin-top: auto; font-size: clamp(2rem, 4vw, 4rem); letter-spacing: -.05em; }
.skill-number { font: .75rem "Cascadia Code", "SFMono-Regular", Consolas, monospace; }
.skill-card h3 { margin-top: 4rem; font-size: clamp(1.3rem, 2.3vw, 2rem); }

.about { display: grid; grid-template-columns: .78fr 1.22fr; gap: clamp(3rem, 8vw, 8rem); align-items: center; }
.about-image { position: relative; }
.about-image img { aspect-ratio: .78; object-fit: cover; filter: grayscale(.25); border: 1px solid var(--line); }
.about-image-placeholder { aspect-ratio: .78; display: grid; place-content: center; gap: 1rem; text-align: center; background: linear-gradient(145deg, var(--surface-strong), var(--surface)); border: 1px solid var(--line); overflow: hidden; position: relative; }
.about-image-placeholder::before { content: ""; position: absolute; inset: 0; opacity: .55; background-image: linear-gradient(var(--line) 1px, transparent 1px), linear-gradient(90deg, var(--line) 1px, transparent 1px); background-size: 48px 48px; mask-image: radial-gradient(circle at center, black, transparent 72%); }
.about-image-placeholder > * { position: relative; z-index: 1; }
.about-image-placeholder > span { font: 500 clamp(4rem, 10vw, 8rem) "Cascadia Code", "SFMono-Regular", Consolas, monospace; letter-spacing: -.1em; }
.about-image-placeholder small { color: var(--muted); font: .7rem "Cascadia Code", "SFMono-Regular", Consolas, monospace; text-transform: uppercase; letter-spacing: .1em; }
.image-caption { position: absolute; bottom: 1rem; left: 1rem; margin: 0; padding: .35rem .55rem; background: rgba(11,13,15,.82); color: #f2f2ee; }
.about-copy h2 { max-width: 800px; }
.about-copy > p:not(.section-index) { max-width: 760px; color: var(--muted); }
.about-copy .about-lead { color: var(--text); font-size: clamp(1.1rem, 1.8vw, 1.35rem); }
.personal-tags { display: flex; flex-wrap: wrap; gap: .55rem; padding: 0; margin: 2rem 0 0; list-style: none; }

.certificate-grid { display: grid; border-top: 1px solid var(--line); }
.certificate-card { width: 100%; display: grid; grid-template-columns: 70px 1fr auto; gap: 1.5rem; align-items: center; min-height: 150px; padding: 1.25rem 0; color: var(--text); background: transparent; border: 0; border-bottom: 1px solid var(--line); text-align: left; cursor: pointer; }
.certificate-card:hover { color: var(--accent); }
.certificate-card p { margin-bottom: .25rem; color: var(--muted); font: .7rem "Cascadia Code", "SFMono-Regular", Consolas, monospace; text-transform: uppercase; letter-spacing: .08em; }
.certificate-card h3 { margin: 0; font-size: clamp(1.35rem, 3vw, 2.2rem); }
.certificate-number { color: var(--muted); font: .72rem "Cascadia Code", "SFMono-Regular", Consolas, monospace; }
.certificate-status { color: var(--accent); font: .66rem "Cascadia Code", "SFMono-Regular", Consolas, monospace; text-transform: uppercase; letter-spacing: .08em; }

.certificate-viewer { width: min(1100px, calc(100% - 2rem)); max-height: calc(100dvh - 2rem); padding: 0; color: var(--text); background: var(--surface-strong); border: 1px solid var(--accent); box-shadow: 0 0 0 1px rgba(255, 107, 44, .12), var(--shadow); overflow: auto; }
.certificate-viewer::backdrop { background: rgba(2, 4, 5, .82); backdrop-filter: blur(8px); }
.certificate-dialog-header, .certificate-dialog-actions { display: flex; align-items: center; justify-content: space-between; gap: 1.5rem; padding: 1.2rem 1.4rem; }
.certificate-dialog-header { border-bottom: 1px solid var(--line); }
.certificate-dialog-header .section-index { margin-bottom: .4rem; }
.certificate-dialog-header h2 { margin: 0; font-size: clamp(1.25rem, 3vw, 2rem); letter-spacing: -.03em; }
.dialog-close-icon { width: 44px; height: 44px; flex: 0 0 auto; color: var(--muted); background: transparent; border: 1px solid var(--line); font-size: 1.7rem; line-height: 1; cursor: pointer; }
.dialog-close-icon:hover { color: var(--accent); border-color: var(--accent); }
.certificate-media { position: relative; padding: clamp(.75rem, 2vw, 1.5rem); background: #080a0c; user-select: none; -webkit-user-select: none; }
.certificate-media::after { content: ""; position: absolute; inset: 0; z-index: 2; }
.certificate-media img { width: 100%; max-height: 68vh; object-fit: contain; pointer-events: none; user-select: none; -webkit-user-drag: none; }
.certificate-dialog-actions { border-top: 1px solid var(--line); }
.certificate-navigation { display: flex; gap: .6rem; }
.certificate-dialog-actions .button:hover { color: #0b0d0f; background: var(--accent); border-color: var(--accent); }
.certificate-protection-note { margin: 0; padding: 0 1.4rem 1.2rem; color: var(--muted); font: .62rem "Cascadia Code", "SFMono-Regular", Consolas, monospace; text-align: right; text-transform: uppercase; letter-spacing: .07em; }

.contact { background: var(--surface); padding-inline: clamp(1.5rem, 5vw, 5rem); border: 1px solid var(--line); }
.contact-layout { display: grid; grid-template-columns: 1.2fr .8fr; gap: 4rem; align-items: end; }
.contact h2 { margin-bottom: 0; }
.contact h2 span:last-child { color: var(--accent); }
.contact-layout p { color: var(--muted); }
.social-list { display: grid; border-top: 1px solid var(--line); }
.social-list a { display: flex; justify-content: space-between; padding: .8rem 0; border-bottom: 1px solid var(--line); text-decoration: none; }
.social-list a:hover { color: var(--accent); }
.site-footer { min-height: 140px; display: flex; justify-content: space-between; align-items: center; gap: 2rem; color: var(--muted); font: .72rem "Cascadia Code", "SFMono-Regular", Consolas, monospace; }
.site-footer p { margin: 0; }
.site-footer a { text-decoration: none; }

.reveal { opacity: 0; transform: translateY(24px); transition: opacity .65s ease, transform .65s ease; }
.reveal.visible { opacity: 1; transform: none; }

@media (max-width: 900px) {
  .site-header { grid-template-columns: 1fr auto auto; }
  .menu-toggle { display: grid; gap: 6px; width: 44px; height: 44px; place-content: center; background: transparent; border: 0; cursor: pointer; }
  .menu-toggle span:not(.sr-only) { display: block; width: 22px; height: 1px; background: var(--text); transition: transform .2s ease; }
  .menu-toggle[aria-expanded="true"] span:nth-last-child(2) { transform: translateY(3.5px) rotate(45deg); }
  .menu-toggle[aria-expanded="true"] span:last-child { transform: translateY(-3.5px) rotate(-45deg); }
  .main-navigation { position: fixed; inset: 76px 0 auto; padding: 2rem 1.5rem; display: none; flex-direction: column; background: var(--bg); border-bottom: 1px solid var(--line); }
  .main-navigation.open { display: flex; }
  .hero { grid-template-columns: 1fr; }
  .hero-visual { width: min(88%, 520px); justify-self: center; }
  .profile-frame img { height: min(90vw, 440px); }
  .section-heading, .contact-layout { grid-template-columns: 1fr; }
  .project-card { grid-column: span 6; }
  .about { grid-template-columns: 1fr; }
  .about-image { max-width: 560px; }
}

@media (max-width: 620px) {
  .section-shell { width: min(calc(100% - 2rem), var(--max-width)); }
  .site-header { padding-inline: 1rem; gap: .45rem; }
  .hero { min-height: auto; padding-top: 5rem; }
  h1 { font-size: clamp(2.65rem, 13vw, 4rem); }
  .code-card { right: 0; top: -3rem; width: 190px; }
  .profile-label { align-items: flex-start; flex-direction: column; gap: .2rem; }
  .project-card { min-height: 390px; }
  .project-card { grid-column: span 12; }
  .certificate-card { grid-template-columns: 45px 1fr; }
  .certificate-status { grid-column: 2; }
  .certificate-dialog-header, .certificate-dialog-actions { align-items: stretch; }
  .certificate-dialog-actions { flex-direction: column; }
  .certificate-navigation { display: grid; grid-template-columns: 1fr 1fr; }
  .certificate-navigation .button { padding-inline: .7rem; }
  .certificate-protection-note { text-align: left; }
  .skills-layout { grid-template-columns: 1fr; }
  .skill-feature { grid-row: auto; min-height: 390px; }
  .skill-card { border-right: 0; }
  .site-footer { padding-block: 2rem; flex-direction: column; align-items: flex-start; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; transition-duration: .01ms !important; }
  .reveal { opacity: 1; transform: none; }
}

.project-live-link {
  border-color: var(--accent);
  box-shadow: inset 0 0 0 1px var(--accent);
}

.play-project-cta {
  position: fixed;
  right: clamp(1rem, 2.5vw, 2.5rem);
  bottom: clamp(1rem, 2.5vw, 2.5rem);
  z-index: 30;
  display: flex;
  align-items: center;
  gap: .65rem;
  padding: .85rem 1rem;
  border: 1px solid var(--accent);
  background: var(--bg);
  color: var(--text);
  font: .72rem "Cascadia Code", "SFMono-Regular", Consolas, monospace;
  letter-spacing: .06em;
  text-decoration: none;
  text-transform: uppercase;
  box-shadow: 0 12px 30px rgba(0, 0, 0, .28);
  transition: background-color .2s ease, color .2s ease, transform .2s ease;
}

.play-project-cta:hover,
.play-project-cta:focus-visible {
  background: var(--accent);
  color: #0b0d0e;
  transform: translateY(-.2rem);
}

@media (max-width: 900px) {
  .play-project-cta {
    right: 1rem;
    bottom: 1rem;
  }
}