:root {
  --bg: #ffffff;
  --text: #111111;
  --muted: rgba(17, 17, 17, 0.62);
  --border: rgba(17, 17, 17, 0.1);
  --card: rgba(17, 17, 17, 0.03);
  --shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
  --radius: 22px;
  --max: 1080px;

  --link: rgba(0, 0, 0, 0.85);
  --accent: #0071e3;
}

:root[data-theme="dark"] {
  --bg: #0b0b0c;
  --text: rgba(255, 255, 255, 0.92);
  --muted: rgba(255, 255, 255, 0.62);
  --border: rgba(255, 255, 255, 0.12);
  --card: rgba(255, 255, 255, 0.06);
  --shadow: 0 16px 40px rgba(0, 0, 0, 0.45);
  --link: rgba(255, 255, 255, 0.9);
  --accent: #0a84ff;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  scroll-behavior: smooth;
}

body {
  font-family: ui-sans-serif, system-ui, -apple-system, "SF Pro Display", "SF Pro Text", Segoe UI, Roboto,
    Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
}

.skip-link {
  position: absolute;
  top: -40px;
  left: 10px;
  padding: 8px 12px;
  background: var(--text);
  color: var(--bg);
  border-radius: 10px;
  z-index: 200;
}

.skip-link:focus {
  top: 10px;
}

.wrap {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 18px;
}

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

a:hover {
  opacity: 0.92;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 40;
  background: color-mix(in srgb, var(--bg) 86%, transparent);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border);
}

.topbar-inner {
  min-height: 58px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
}

.brand {
  width: 38px;
  height: 38px;
  display: grid;
  place-items: center;
  border: 1px solid var(--border);
  border-radius: 14px;
  background: var(--card);
  font-weight: 800;
  letter-spacing: 0.2px;
}

.nav {
  display: flex;
  gap: 14px;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
}

.nav a {
  font-size: 0.95rem;
  color: var(--muted);
  padding: 8px 10px;
  border-radius: 999px;
}

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

.topbar-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

.icon-btn {
  width: 38px;
  height: 38px;
  border-radius: 14px;
  border: 1px solid var(--border);
  background: var(--card);
  color: var(--text);
  cursor: pointer;
}

.menu-btn {
  display: none;
  width: auto;
  min-width: 74px;
  padding: 0 12px;
  font-size: 0.85rem;
}

.menu-close {
  display: none;
}

.menu-btn[aria-expanded="true"] .menu-open {
  display: none;
}

.menu-btn[aria-expanded="true"] .menu-close {
  display: inline;
}

.mobile-nav {
  display: none;
  border-top: 1px solid var(--border);
  padding: 10px 18px 14px;
  gap: 8px;
  flex-direction: column;
}

.mobile-nav a {
  color: var(--muted);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 10px 12px;
  background: var(--card);
}

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

.mobile-nav.open {
  display: flex;
}

.hero {
  padding: 84px 0 36px;
}

.eyebrow {
  margin: 0 0 10px;
  font-size: 0.95rem;
  letter-spacing: 0.02em;
  color: var(--muted);
}

.headline {
  margin: 0 0 14px;
  font-size: clamp(40px, 6vw, 64px);
  line-height: 1.02;
  letter-spacing: -0.03em;
}

.headline-soft {
  color: var(--muted);
}

.subhead {
  margin: 0 0 22px;
  max-width: 720px;
  font-size: 1.15rem;
  line-height: 1.7;
  color: var(--muted);
}

.hero-cta {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 18px;
}

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

.meta-pill {
  border: 1px solid var(--border);
  background: var(--card);
  padding: 10px 12px;
  border-radius: 999px;
  color: var(--muted);
  font-size: 0.95rem;
}

.section {
  padding: 64px 0;
  scroll-margin-top: 78px;
}

.section.alt {
  background: color-mix(in srgb, var(--card) 60%, transparent);
  border-top: 1px solid color-mix(in srgb, var(--border) 70%, transparent);
  border-bottom: 1px solid color-mix(in srgb, var(--border) 70%, transparent);
}

.section-head {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 22px;
}

.section-head h2 {
  margin: 0;
  font-size: 1.85rem;
  letter-spacing: -0.015em;
}

.section-head p {
  margin: 0;
  max-width: 760px;
  color: var(--muted);
  line-height: 1.7;
  font-size: 1.05rem;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}

.card {
  border: 1px solid var(--border);
  background: var(--card);
  border-radius: var(--radius);
  padding: 18px;
}

.card h3 {
  margin: 0 0 10px;
  letter-spacing: -0.01em;
}

.card p {
  margin: 0;
  color: var(--muted);
  line-height: 1.65;
}

ul {
  margin: 0;
  padding-left: 18px;
  color: var(--muted);
  line-height: 1.75;
}

.project-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 10px;
}

.tag {
  font-size: 0.9rem;
  color: var(--muted);
  border: 1px solid var(--border);
  background: var(--bg);
  padding: 7px 10px;
  border-radius: 999px;
}

.project p {
  color: var(--muted);
}

.project-actions {
  margin-top: 14px;
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}

.link {
  color: var(--link);
  font-weight: 650;
  border-bottom: 1px solid color-mix(in srgb, var(--link) 25%, transparent);
  padding-bottom: 2px;
}

.link:hover {
  border-bottom-color: color-mix(in srgb, var(--accent) 55%, transparent);
  color: var(--accent);
}

.stack {
  display: grid;
  gap: 14px;
}

.row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 14px;
  margin-bottom: 8px;
}

.muted {
  color: var(--muted);
}

.bullets {
  margin: 0;
  padding-left: 18px;
  color: var(--muted);
  line-height: 1.75;
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 0.85fr;
  gap: 14px;
  align-items: start;
}

label {
  display: grid;
  gap: 6px;
  margin-bottom: 12px;
  color: var(--muted);
  font-weight: 650;
}

input,
textarea {
  width: 100%;
  padding: 12px 12px;
  border-radius: 16px;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text);
  outline: none;
}

input:focus,
textarea:focus {
  border-color: color-mix(in srgb, var(--accent) 55%, var(--border));
  box-shadow: 0 0 0 4px color-mix(in srgb, var(--accent) 15%, transparent);
}

.hp-field {
  position: absolute;
  left: -9999px;
  width: 1px;
  height: 1px;
  overflow: hidden;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 11px 16px;
  border-radius: 999px;
  border: 1px solid color-mix(in srgb, var(--accent) 35%, var(--border));
  background: var(--accent);
  color: white;
  font-weight: 750;
  cursor: pointer;
}

.btn.ghost {
  background: var(--bg);
  color: var(--text);
  border-color: var(--border);
}

.btn:hover {
  opacity: 0.95;
}

.btn[disabled] {
  opacity: 0.7;
  cursor: not-allowed;
}

hr {
  border: none;
  border-top: 1px solid var(--border);
  margin: 14px 0;
}

.note {
  margin: 10px 0 0;
  color: var(--muted);
  font-size: 0.95rem;
  line-height: 1.6;
}

.line {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  margin: 10px 0;
  color: var(--text);
}

.line a {
  text-align: right;
}

.footer {
  padding: 34px 0 50px;
  border-top: 1px solid var(--border);
}

.footer p {
  margin: 0;
  color: var(--muted);
}

.reveal {
  opacity: 0;
  transform: translateY(10px);
  transition: opacity 700ms ease, transform 700ms ease;
}

.reveal.in {
  opacity: 1;
  transform: translateY(0);
}

a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

@media (prefers-reduced-motion: reduce) {
  html,
  body {
    scroll-behavior: auto;
  }

  .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }
}

@media (max-width: 980px) {
  .grid-3 {
    grid-template-columns: 1fr;
  }

  .contact-grid {
    grid-template-columns: 1fr;
  }

  .hero {
    padding: 74px 0 26px;
  }
}

@media (max-width: 720px) {
  .nav {
    display: none;
  }

  .menu-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
  }

  .headline {
    font-size: clamp(36px, 9vw, 54px);
  }
}