/* Signal studio visual layer: technical, calm, and intentionally not corporate blue-grid. */
:root {
  color-scheme: light;
  --bg: #f5f3ef;
  --surface: rgba(255, 254, 251, 0.8);
  --surface-soft: #ece8e1;
  --ink: #1a1b1d;
  --muted: #62615e;
  --line: rgba(55, 52, 47, 0.18);
  --line-soft: rgba(55, 52, 47, 0.1);
  --accent: #bd7c4b;
  --accent-dark: #744827;
  --accent-soft: rgba(189, 124, 75, 0.13);
  --shadow: 0 20px 55px rgba(35, 33, 30, 0.12);
  --violet: #4f6d8a;
  --mint: #7c5b43;
  --sun: #d39a5b;
  --online: #607b94;
}

body {
  background:
    radial-gradient(circle at 8% 8%, rgba(189, 124, 75, 0.14), transparent 24rem),
    radial-gradient(circle at 92% 16%, rgba(79, 109, 138, 0.13), transparent 27rem),
    radial-gradient(circle at 78% 92%, rgba(211, 154, 91, 0.12), transparent 25rem),
    var(--bg);
  background-attachment: fixed;
  font-family: ui-monospace, "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
}

body::before {
  position: fixed;
  inset: 0;
  z-index: -1;
  content: "";
  pointer-events: none;
  opacity: 0.38;
  background-image: radial-gradient(rgba(35, 33, 30, 0.23) 0.7px, transparent 0.7px);
  background-size: 13px 13px;
  mask-image: linear-gradient(to bottom, black, transparent 72%);
}

.site-header {
  width: min(1120px, calc(100% - 32px));
  top: 14px;
  margin-bottom: 14px;
  padding: 13px 18px;
  border: 1px solid rgba(255, 255, 255, 0.7);
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.62);
  box-shadow: 0 10px 30px rgba(35, 33, 30, 0.09);
}

.page,
.footer {
  width: min(1120px, calc(100% - 32px));
}

.wordmark {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  letter-spacing: -0.04em;
}

.wordmark::before {
  width: 10px;
  height: 10px;
  border-radius: 999px;
  content: "";
  background: var(--online);
  box-shadow: 0 0 0 4px rgba(96, 123, 148, 0.14), 0 0 14px rgba(96, 123, 148, 0.42);
  transform: none;
}

.menu-toggle {
  display: none;
  min-width: 44px;
  min-height: 44px;
  align-items: center;
  justify-content: center;
  gap: 7px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.64);
  color: var(--ink);
  font: inherit;
  font-size: 0.8rem;
  cursor: pointer;
}

.menu-toggle-icon,
.menu-toggle-icon::before,
.menu-toggle-icon::after {
  display: block;
  width: 14px;
  height: 1.5px;
  border-radius: 2px;
  background: currentColor;
}

.menu-toggle-icon {
  position: relative;
}

.menu-toggle-icon::before,
.menu-toggle-icon::after {
  position: absolute;
  left: 0;
  content: "";
}

.menu-toggle-icon::before { top: -5px; }
.menu-toggle-icon::after { top: 5px; }

.menu-toggle:hover,
.menu-toggle:focus-visible {
  border-color: transparent;
  background: var(--ink);
  color: #fff;
}

nav {
  gap: 5px;
}

nav a {
  padding: 5px 8px;
  border-radius: 999px;
  transition: color 160ms ease, background 160ms ease;
}

nav a:hover,
nav a:focus-visible {
  background: var(--accent-soft);
  color: var(--accent-dark);
}

.hero {
  position: relative;
  min-height: 59svh;
  padding-top: clamp(58px, 9vw, 110px);
}

.hero-copy {
  position: relative;
  z-index: 1;
}

.eyebrow,
.project-type {
  color: var(--accent-dark);
  letter-spacing: 0.08em;
}

.eyebrow::before {
  margin-right: 8px;
  color: var(--mint);
  content: "";
}

h1 {
  max-width: 790px;
  font-size: clamp(1.7rem, 3.15vw, 2.75rem);
  letter-spacing: -0.045em;
}

.rotating-role {
  color: var(--violet);
  text-decoration-color: rgba(189, 124, 75, 0.62);
  text-decoration-style: wavy;
}

.button {
  border-color: rgba(79, 109, 138, 0.24);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.64);
  box-shadow: 0 6px 16px rgba(35, 33, 30, 0.07);
}

.actions .button:first-child {
  border-color: transparent;
  background: linear-gradient(110deg, var(--accent), var(--sun));
  color: var(--ink);
}

.button:hover,
.button:focus-visible {
  border-color: transparent;
  background: var(--ink);
  color: #fff;
  transform: translateY(-2px);
}

.system-card {
  position: relative;
  z-index: 1;
  border-color: #292a29;
  border-radius: 18px;
  background: #18191b;
  box-shadow: 0 22px 52px rgba(20, 20, 20, 0.22);
}

.system-topline {
  border-color: rgba(255, 255, 255, 0.1);
}

.system-topline span:nth-child(1) { background: var(--accent); }
.system-topline span:nth-child(2) { background: var(--sun); }
.system-topline span:nth-child(3) { background: #8393a3; }

.system-card pre {
  position: relative;
  z-index: 1;
  color: #f1f0ed;
}

.section {
  border-color: var(--line);
}

.section-label span {
  color: var(--accent-dark);
}

.section-label h2 {
  letter-spacing: -0.03em;
}

.project-card,
.skill-grid article,
.timeline article,
.scholar-card,
.note-list {
  border-color: rgba(255, 255, 255, 0.72);
  border-radius: 18px;
  background: var(--surface);
  box-shadow: var(--shadow);
  backdrop-filter: blur(16px);
}

.project-card::before,
.timeline article::before,
.skill-grid article::before {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  content: "";
  background: linear-gradient(90deg, var(--accent), var(--sun));
}

.project-card:nth-child(3n + 2)::before,
.skill-grid article:nth-child(2)::before,
.timeline article:nth-child(3n + 2)::before { background: linear-gradient(90deg, var(--violet), #8195aa); }
.project-card:nth-child(3n)::before,
.skill-grid article:nth-child(3)::before,
.timeline article:nth-child(3n)::before { background: linear-gradient(90deg, var(--mint), #b78a67); }

.project-card:hover,
.project-card:focus-within,
.skill-grid article:hover,
.skill-grid article:focus-within,
.timeline article:hover,
.timeline article:focus-within,
.scholar-card:hover,
.scholar-card:focus-within {
  border-color: rgba(189, 124, 75, 0.38);
  box-shadow: 0 26px 60px rgba(35, 33, 30, 0.16);
  transform: translateY(-6px) rotate(-0.15deg);
}

.timeline span,
.card-link,
.paper-list .paper-tag {
  color: var(--violet);
}

.note-list a:hover,
.note-list a:focus-visible,
.paper-list a:hover,
.paper-list a:focus-visible {
  background: rgba(189, 124, 75, 0.08);
  color: var(--accent-dark);
}

.article-hero h1 {
  color: var(--ink);
}

.article-hero img {
  border-radius: 20px;
  border-color: rgba(255, 255, 255, 0.75);
}

.article-content blockquote {
  border-color: var(--accent);
}

.article-content a {
  color: var(--accent-dark);
  text-decoration-color: rgba(189, 124, 75, 0.4);
}

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

:focus-visible {
  outline: 3px solid var(--sun);
  outline-offset: 3px;
}

@media (max-width: 720px) {
  .site-header {
    position: relative;
    align-items: center;
    flex-direction: row;
    gap: 12px;
    border-radius: 0 0 18px 18px;
  }

  .menu-toggle {
    display: inline-flex;
    margin-left: auto;
  }

  .site-header nav {
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    left: 0;
    display: flex;
    flex-direction: column;
    gap: 2px;
    border: 1px solid rgba(255, 255, 255, 0.76);
    border-radius: 14px;
    background: rgba(255, 254, 251, 0.96);
    box-shadow: 0 16px 30px rgba(35, 33, 30, 0.16);
    padding: 8px;
    backdrop-filter: blur(16px);
  }

  html.js .site-header nav[hidden] {
    display: none;
  }

  .site-header nav a {
    display: flex;
    min-height: 44px;
    align-items: center;
    border-radius: 9px;
    padding: 10px 12px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .button,
  nav a,
  .project-card,
  .skill-grid article,
  .timeline article,
  .scholar-card {
    transition: none;
  }

  .button:hover,
  .button:focus-visible,
  .project-card:hover,
  .project-card:focus-within,
  .skill-grid article:hover,
  .skill-grid article:focus-within,
  .timeline article:hover,
  .timeline article:focus-within,
  .scholar-card:hover,
  .scholar-card:focus-within {
    transform: none;
  }
}