/* Matthew Flynn — personal site
   Design language: Instrument Serif / Instrument Sans / Spline Sans Mono
   Warm paper light sections + deep navy dark sections, electric blue accent */

:root {
  --ink: #14171f;
  --paper: #f6f3ec;
  --paper-2: #efeadf;
  --card: #fbf9f4;
  --line: #ddd6c8;
  --line-2: #cfc7b5;
  --blue: #2f5dff;
  --blue-dark: #1d44d8;
  --peri: #7d97ff;
  --navy: #0d111c;
  --cream: #f4f1e9;
  --muted: #5f5c52;
  --sand: #a9a291;
  --tan: #b3ab98;
  --gray: #8a8578;
  --body-text: #3c3a33;
  --nav-text: #4d4a42;
}

html { scroll-behavior: smooth; }
* , *::before, *::after { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: 'Instrument Sans', sans-serif;
  -webkit-font-smoothing: antialiased;
}
::selection { background: var(--blue); color: #fff; }
a { color: var(--blue); }
a:hover { color: var(--blue-dark); }
img { max-width: 100%; }

.serif { font-family: 'Instrument Serif', serif; font-weight: 400; }
.mono { font-family: 'Spline Sans Mono', monospace; }

.wrap { max-width: 1240px; margin: 0 auto; padding-left: 36px; padding-right: 36px; }

/* ---------- NAV ---------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(246,243,236,0.88);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line);
}
.site-nav {
  max-width: 1240px; margin: 0 auto; padding: 0 36px;
  height: 72px; display: flex; align-items: center;
  justify-content: space-between; gap: 24px;
}
.brand { display: flex; align-items: baseline; gap: 10px; text-decoration: none; color: var(--ink); }
.brand-name { font-family: 'Instrument Serif', serif; font-size: 24px; letter-spacing: -0.01em; }
.brand-suffix { font-family: 'Spline Sans Mono', monospace; font-size: 11px; letter-spacing: 1.5px; color: var(--gray); }
.nav-links { display: flex; align-items: center; gap: 32px; }
.nav-link {
  text-decoration: none; color: var(--nav-text);
  font-family: 'Spline Sans Mono', monospace; font-size: 12.5px;
  letter-spacing: 1px; text-transform: uppercase;
}
.nav-link:hover { color: var(--blue); }
.nav-cta {
  text-decoration: none; background: var(--ink); color: var(--paper);
  font-family: 'Spline Sans Mono', monospace; font-size: 12px;
  letter-spacing: 1px; text-transform: uppercase;
  padding: 11px 20px; border-radius: 999px;
}
.nav-cta:hover { background: var(--blue); color: #fff; }

/* ---------- DARK HERO ---------- */
.hero {
  position: relative; overflow: hidden;
  background: var(--navy);
  background-image:
    linear-gradient(rgba(255,255,255,0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.035) 1px, transparent 1px);
  background-size: 56px 56px;
  color: var(--cream);
}
.glow { position: absolute; border-radius: 50%; pointer-events: none; }
.glow-tr { top: -220px; right: -100px; width: 640px; height: 640px;
  background: radial-gradient(circle, rgba(47,93,255,0.30), transparent 64%); }
.glow-bl { bottom: -260px; left: -180px; width: 560px; height: 560px;
  background: radial-gradient(circle, rgba(47,93,255,0.14), transparent 64%); }
.glow-tl { top: -200px; left: -140px; width: 560px; height: 560px;
  background: radial-gradient(circle, rgba(47,93,255,0.28), transparent 64%); }

.eyebrow {
  font-family: 'Spline Sans Mono', monospace; font-size: 12px;
  letter-spacing: 3px; text-transform: uppercase;
  display: flex; align-items: center; gap: 14px;
}
.eyebrow-dark { color: var(--peri); }
.eyebrow-light { color: var(--blue); }
.eyebrow .tick { width: 34px; height: 1px; background: currentColor; display: inline-block; }

.hero-inner {
  padding: 96px 0 88px; position: relative;
  display: flex; gap: 72px; align-items: center; flex-wrap: wrap;
}
.hero-copy { flex: 1 1 500px; min-width: 320px; }
.hero h1 {
  font-family: 'Instrument Serif', serif; font-weight: 400;
  font-size: clamp(44px, 6vw, 76px); line-height: 1.0;
  letter-spacing: -0.015em; margin: 28px 0; color: var(--cream);
}
.hero h1 em, .accent-peri { color: var(--peri); font-style: italic; }
.hero-sub { font-size: 18.5px; line-height: 1.65; color: rgba(244,241,233,0.72); max-width: 560px; margin: 0 0 40px; }
.hero-ctas { display: flex; gap: 14px; flex-wrap: wrap; align-items: center; }

.btn-primary {
  text-decoration: none; background: var(--blue); color: #fff;
  font-weight: 500; font-size: 15.5px; padding: 15px 28px; border-radius: 999px;
  display: inline-flex; align-items: center; gap: 10px;
  box-shadow: 0 10px 30px rgba(47,93,255,0.35);
}
.btn-primary:hover { background: var(--blue-dark); color: #fff; }
.btn-primary .arrow { font-family: 'Spline Sans Mono', monospace; }
.btn-ghost {
  text-decoration: none; border: 1px solid rgba(244,241,233,0.28); color: var(--cream);
  font-weight: 500; font-size: 15.5px; padding: 15px 28px; border-radius: 999px;
}
.btn-ghost:hover { border-color: var(--peri); color: var(--peri); }

.availability {
  display: inline-flex; align-items: center; gap: 10px; margin-top: 40px;
  font-family: 'Spline Sans Mono', monospace; font-size: 12px; letter-spacing: 1px;
  color: rgba(244,241,233,0.65); border: 1px solid rgba(244,241,233,0.16);
  padding: 9px 16px; border-radius: 999px;
}
.availability .dot {
  width: 7px; height: 7px; border-radius: 50%; background: #3ddc84;
  box-shadow: 0 0 0 4px rgba(61,220,132,0.18);
}

.headshot-frame { flex: 0 0 auto; position: relative; margin-right: 12px; }
.headshot-frame .offset-border {
  position: absolute; inset: 0; transform: translate(18px,18px);
  border: 1px solid rgba(125,151,255,0.55); border-radius: 4px; pointer-events: none;
}
.headshot-frame img {
  display: block; width: 340px; height: 420px; object-fit: cover; object-position: top;
  position: relative; border-radius: 4px;
  box-shadow: 0 24px 60px rgba(0,0,0,0.45);
}

.cred-strip { border-top: 1px solid rgba(244,241,233,0.12); position: relative; }
.cred-grid { display: grid; grid-template-columns: repeat(3,1fr); }
.cred-cell { padding: 26px 32px; border-right: 1px solid rgba(244,241,233,0.12); }
.cred-cell:first-child { padding-left: 0; }
.cred-cell:last-child { border-right: none; padding-right: 0; }
.cred-label {
  font-family: 'Spline Sans Mono', monospace; font-size: 10.5px;
  letter-spacing: 2px; text-transform: uppercase; color: var(--peri); margin-bottom: 8px;
}
.cred-value { font-size: 15px; color: rgba(244,241,233,0.85); }

/* ---------- LIGHT SECTIONS ---------- */
.section { scroll-margin-top: 84px; }
.section-paper { background: var(--paper); }
.section-paper2 { background: var(--paper-2); border-top: 1px solid var(--line); }
.section-inner { padding: 110px 0; }
.section-inner-sm { padding: 100px 0; }

.split { display: flex; gap: 80px; flex-wrap: wrap; }
.split-label { flex: 0 0 300px; }
.split-body { flex: 1 1 460px; min-width: 320px; }
.split-label .eyebrow { margin-bottom: 20px; }

h2.section-title {
  font-family: 'Instrument Serif', serif; font-weight: 400;
  font-size: clamp(34px, 4vw, 44px); line-height: 1.05;
  letter-spacing: -0.01em; margin: 0; color: var(--ink);
}
h2.section-title em, .accent-blue { color: var(--blue); }

.prose { font-size: 18.5px; line-height: 1.7; color: var(--body-text); margin: 0 0 22px; }

.focus-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 0 40px; margin-top: 22px; }
.focus-item {
  display: flex; align-items: baseline; gap: 14px; padding: 14px 0;
  border-top: 1px solid var(--line);
}
.focus-item:nth-last-child(-n+2) { border-bottom: 1px solid var(--line); }
.focus-item .key { font-family: 'Spline Sans Mono', monospace; font-size: 11px; color: var(--sand); }
.focus-item .val { font-size: 15.5px; font-weight: 500; }

/* ---------- RESEARCH LIST ---------- */
.section-head {
  display: flex; justify-content: space-between; align-items: flex-end;
  gap: 24px; flex-wrap: wrap; margin-bottom: 56px;
}
.section-head .eyebrow { margin-bottom: 20px; }
.head-link {
  text-decoration: none; font-family: 'Spline Sans Mono', monospace; font-size: 12.5px;
  letter-spacing: 1px; text-transform: uppercase; color: var(--ink);
  border-bottom: 1px solid var(--blue); padding-bottom: 4px;
}
.head-link:hover { color: var(--blue); }

.pub-list { border-top: 1px solid var(--line-2); }
.pub-row {
  display: grid; grid-template-columns: 80px 1fr auto; gap: 28px;
  align-items: baseline; padding: 34px 12px;
  border-bottom: 1px solid var(--line-2);
  text-decoration: none; color: inherit;
}
.pub-row:hover { background: var(--card); color: inherit; }
.pub-num { font-family: 'Instrument Serif', serif; font-style: italic; font-size: 30px; color: var(--tan); }
.pub-tags {
  display: flex; gap: 16px; flex-wrap: wrap; margin-bottom: 10px;
  font-family: 'Spline Sans Mono', monospace; font-size: 11px;
  letter-spacing: 1.5px; text-transform: uppercase;
}
.pub-tags .venue { color: var(--blue); }
.pub-tags .year { color: var(--sand); }
.pub-tags .rank { color: var(--gray); }
.pub-title {
  font-family: 'Instrument Serif', serif; font-weight: 400;
  font-size: clamp(22px, 2.6vw, 28px); line-height: 1.2; margin: 0 0 10px; color: var(--ink);
}
.pub-desc { font-size: 15.5px; line-height: 1.6; color: var(--muted); margin: 0; max-width: 720px; }
.pub-arrow { font-family: 'Spline Sans Mono', monospace; font-size: 18px; color: var(--blue); }

.subhead {
  font-family: 'Spline Sans Mono', monospace; font-size: 12px; letter-spacing: 3px;
  text-transform: uppercase; color: var(--blue); margin: 64px 0 24px;
}
.wip-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 0 48px; }
.wip-item { padding: 18px 4px; border-top: 1px solid var(--line-2); }
.wip-title { font-family: 'Instrument Serif', serif; font-size: 20px; line-height: 1.3; margin: 0 0 6px; color: var(--ink); }
.wip-meta { font-family: 'Spline Sans Mono', monospace; font-size: 11.5px; letter-spacing: 0.5px; color: var(--sand); }

/* ---------- TEACHING ---------- */
.course-item {
  display: flex; align-items: baseline; justify-content: space-between; gap: 20px;
  padding: 16px 0; border-top: 1px solid var(--line-2);
}
.course-item:last-child { border-bottom: 1px solid var(--line-2); }
.course-code { font-family: 'Spline Sans Mono', monospace; font-size: 12px; letter-spacing: 1px; color: var(--sand); white-space: nowrap; }
.course-name { font-size: 16px; font-weight: 500; }
.course-school { font-family: 'Spline Sans Mono', monospace; font-size: 11px; letter-spacing: 1.5px; text-transform: uppercase; color: var(--gray); margin: 34px 0 8px; }
.course-school:first-of-type { margin-top: 0; }

.recognition { margin-top: 48px; }
.recog-item { padding: 14px 0; border-top: 1px solid var(--line-2); font-size: 15.5px; color: var(--body-text); }
.recog-item strong { color: var(--ink); font-weight: 500; }

/* ---------- BRIDGE CTA ---------- */
.bridge {
  display: flex; justify-content: space-between; align-items: center; gap: 36px;
  flex-wrap: wrap; text-decoration: none; color: var(--cream);
  background: var(--navy);
  background-image: radial-gradient(circle at 85% 0%, rgba(47,93,255,0.35), transparent 55%);
  border-radius: 8px; padding: 56px 60px; position: relative; overflow: hidden;
}
.bridge:hover { background-color: #111726; color: var(--cream); }
.bridge .eyebrow { margin-bottom: 16px; font-size: 11.5px; }
.bridge h2 {
  font-family: 'Instrument Serif', serif; font-weight: 400;
  font-size: clamp(28px, 3.5vw, 38px); line-height: 1.1; margin: 0 0 12px;
}
.bridge p { font-size: 16.5px; line-height: 1.6; color: rgba(244,241,233,0.68); margin: 0; }
.bridge .btn-primary { white-space: nowrap; }

/* ---------- METHOD CARDS ---------- */
.card-grid-2 { display: grid; grid-template-columns: repeat(2,1fr); gap: 24px; }
.method-card { background: var(--card); border: 1px solid var(--line); border-radius: 6px; padding: 38px; }
.method-card .card-top { display: flex; justify-content: space-between; align-items: baseline; margin-bottom: 22px; }
.method-card .card-num { font-family: 'Instrument Serif', serif; font-style: italic; font-size: 26px; color: var(--tan); }
.method-card .card-tick { width: 40px; height: 1px; background: var(--blue); display: inline-block; }
.method-card h3 { font-family: 'Instrument Serif', serif; font-weight: 400; font-size: 26px; margin: 0 0 12px; color: var(--ink); }
.method-card p { font-size: 15.5px; line-height: 1.62; color: var(--muted); margin: 0 0 22px; }
.chip-row { display: flex; flex-wrap: wrap; gap: 8px; }
.chip {
  font-family: 'Spline Sans Mono', monospace; font-size: 11px; letter-spacing: 0.5px;
  color: var(--blue); border: 1px solid rgba(47,93,255,0.35);
  padding: 5px 11px; border-radius: 999px;
}

/* ---------- TALKS ---------- */
.card-grid-3 { display: grid; grid-template-columns: repeat(3,1fr); gap: 24px; }
.talk-card {
  background: var(--card); border: 1px solid var(--line); border-radius: 6px;
  padding: 32px; display: flex; flex-direction: column; min-height: 260px;
  transition: transform .18s ease, box-shadow .18s ease, border-color .18s ease;
}
a.talk-card { text-decoration: none; color: inherit; }
.talk-card:hover { border-color: var(--blue); transform: translateY(-4px); box-shadow: 0 16px 36px rgba(20,23,31,0.12); }
.talk-tag {
  font-family: 'Spline Sans Mono', monospace; font-size: 11px; letter-spacing: 2px;
  text-transform: uppercase; color: var(--blue); margin-bottom: 20px;
}
.talk-card h3 { font-family: 'Instrument Serif', serif; font-weight: 400; font-size: 22px; line-height: 1.25; margin: 0 0 12px; color: var(--ink); }
.talk-card p { font-size: 14.5px; line-height: 1.58; color: var(--muted); margin: 0 0 auto; }
.talk-meta { font-family: 'Spline Sans Mono', monospace; font-size: 11.5px; color: var(--sand); margin-top: 26px; display: flex; gap: 16px; flex-wrap: wrap; }

.footnote { font-family: 'Spline Sans Mono', monospace; font-size: 12px; color: var(--sand); margin: 26px 0 0; }

/* ---------- DARK SPEAKING SECTION ---------- */
.dark-section {
  background: var(--navy); color: var(--cream);
  position: relative; overflow: hidden;
  background-image:
    linear-gradient(rgba(255,255,255,0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.03) 1px, transparent 1px);
  background-size: 56px 56px;
}
.dark-section h2 {
  font-family: 'Instrument Serif', serif; font-weight: 400;
  font-size: clamp(36px, 4.5vw, 52px); line-height: 1.03; letter-spacing: -0.01em; margin: 0 0 22px;
}
.dark-lede { font-size: 18px; line-height: 1.65; color: rgba(244,241,233,0.7); margin: 0; }
.offer-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 40px; margin: 64px 0 56px; }
.offer { border-top: 1px solid rgba(244,241,233,0.18); padding-top: 24px; }
.offer .offer-num { font-family: 'Instrument Serif', serif; font-style: italic; font-size: 26px; color: var(--peri); margin-bottom: 14px; }
.offer h3 { font-family: 'Instrument Serif', serif; font-weight: 400; font-size: 24px; margin: 0 0 10px; }
.offer p { font-size: 15px; line-height: 1.6; color: rgba(244,241,233,0.62); margin: 0; }

/* ---------- CONTACT ---------- */
.contact-title {
  font-family: 'Instrument Serif', serif; font-weight: 400;
  font-size: clamp(44px, 5.5vw, 64px); line-height: 1.0;
  letter-spacing: -0.01em; margin: 0 0 22px; color: var(--ink);
}
.contact-lede { font-size: 18px; line-height: 1.65; color: var(--body-text); margin: 0 0 34px; max-width: 480px; }
.email-row { display: flex; align-items: center; gap: 16px; flex-wrap: wrap; }
.email-text {
  font-family: 'Spline Sans Mono', monospace; font-size: 18px; color: var(--ink);
  border-bottom: 1px solid var(--line-2); padding-bottom: 4px; text-decoration: none;
}
.email-text:hover { color: var(--blue); }
.copy-btn {
  font-family: 'Spline Sans Mono', monospace; font-size: 12px; letter-spacing: 0.5px;
  border: 1px solid var(--line-2); background: transparent; color: var(--nav-text);
  padding: 8px 15px; border-radius: 999px; cursor: pointer;
}
.copy-btn:hover { border-color: var(--blue); color: var(--blue); }
.elsewhere { flex: 0 0 320px; }
.elsewhere-label {
  font-family: 'Spline Sans Mono', monospace; font-size: 11px; letter-spacing: 2.5px;
  text-transform: uppercase; color: var(--gray); margin-bottom: 18px;
}
.elsewhere-link {
  display: flex; justify-content: space-between; align-items: center;
  text-decoration: none; color: var(--ink); padding: 17px 0;
  border-top: 1px solid var(--line-2); font-weight: 500; font-size: 16px;
}
.elsewhere-link:last-of-type { border-bottom: 1px solid var(--line-2); }
.elsewhere-link:hover { color: var(--blue); }
.elsewhere-link .out { font-family: 'Spline Sans Mono', monospace; color: var(--sand); }

/* ---------- FOOTER ---------- */
.site-footer { background: var(--navy); color: var(--cream); }
.footer-main {
  padding: 48px 0; display: flex; justify-content: space-between;
  align-items: center; gap: 24px; flex-wrap: wrap;
}
.footer-name { font-family: 'Instrument Serif', serif; font-size: 20px; margin-bottom: 5px; }
.footer-role { font-family: 'Spline Sans Mono', monospace; font-size: 12px; letter-spacing: 0.5px; color: rgba(244,241,233,0.45); }
.footer-links { display: flex; gap: 28px; flex-wrap: wrap; }
.footer-link {
  text-decoration: none; color: rgba(244,241,233,0.6);
  font-family: 'Spline Sans Mono', monospace; font-size: 12px;
  letter-spacing: 1px; text-transform: uppercase;
}
.footer-link:hover { color: #fff; }
.footer-bottom { border-top: 1px solid rgba(244,241,233,0.1); }
.footer-bottom-inner { padding: 18px 0; font-family: 'Spline Sans Mono', monospace; font-size: 11.5px; color: rgba(244,241,233,0.35); }

/* ---------- PAGE HERO (secondary pages) ---------- */
.page-hero-inner { padding: 80px 0 76px; position: relative; }
.back-link {
  text-decoration: none; font-family: 'Spline Sans Mono', monospace; font-size: 12px;
  letter-spacing: 1px; text-transform: uppercase; color: rgba(244,241,233,0.55);
  display: inline-flex; align-items: center; gap: 8px; margin-bottom: 34px;
}
.back-link:hover { color: var(--peri); }
.page-hero-inner h1 {
  font-family: 'Instrument Serif', serif; font-weight: 400;
  font-size: clamp(40px, 5.5vw, 64px); line-height: 1.02;
  letter-spacing: -0.015em; margin: 24px 0; max-width: 820px; color: var(--cream);
}
.page-hero-lede { font-size: 19px; line-height: 1.62; color: rgba(244,241,233,0.72); max-width: 660px; margin: 0; }

/* ---------- RESPONSIVE ---------- */
@media (max-width: 960px) {
  .card-grid-3 { grid-template-columns: 1fr 1fr; }
  .offer-grid { grid-template-columns: 1fr; gap: 28px; }
  .cred-grid { grid-template-columns: 1fr; }
  .cred-cell { border-right: none; padding-left: 0; padding-top: 16px; padding-bottom: 16px; border-bottom: 1px solid rgba(244,241,233,0.12); }
  .cred-cell:last-child { border-bottom: none; }
  .bridge { padding: 44px 36px; }
}
@media (max-width: 760px) {
  .wrap { padding-left: 22px; padding-right: 22px; }
  .site-nav { padding: 0 22px; }
  .nav-links { gap: 18px; }
  .nav-links .nav-link { display: none; }
  .card-grid-2, .card-grid-3, .wip-grid, .focus-grid { grid-template-columns: 1fr; }
  .focus-item:nth-last-child(2) { border-bottom: none; }
  .pub-row { grid-template-columns: 1fr; gap: 8px; padding: 28px 4px; }
  .pub-num, .pub-arrow { display: none; }
  .split { gap: 44px; }
  .section-inner { padding: 80px 0; }
  .section-inner-sm { padding: 72px 0; }
  .hero-inner { padding: 72px 0 64px; gap: 48px; }
  .headshot-frame { margin: 0 auto; }
  .elsewhere { flex: 1 1 100%; }
}