/* Shared stylesheet — Johnathan Dempsey resume site.
   Art direction: "Detection-as-Code"
   Dark-first, engineered, asymmetric. Hairline grid, sharp corners, one signal color.
   Typography: Space Grotesk (display + body) + JetBrains Mono (metadata, labels, code). */

:root, [data-theme="dark"] {
  --color-bg:              #0b0f0e;
  --color-surface:         #101514;
  --color-surface-2:       #141a18;
  --color-divider:         #1d2422;
  --color-border:          #2c3532;
  --color-text:            #e6ebe8;
  --color-text-muted:      #9aa5a0;
  --color-text-faint:      #4a5450;
  --color-text-inverse:    #0b0f0e;
  --color-primary:         #2dd4bf;
  --color-primary-hover:   #5eead4;
  --color-primary-highlight: #12302b;

  --font-body: 'Space Grotesk', 'Helvetica Neue', Helvetica, Arial, sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, 'SF Mono', Menlo, Consolas, monospace;

  --content-narrow: 680px;
  --content-default: 1120px;
  --content-wide: 1280px;

  --text-xs:   0.75rem;
  --text-sm:   0.844rem;
  --text-base: clamp(0.97rem, 0.93rem + 0.2vw, 1.06rem);
  --text-lg:   clamp(1.125rem, 1rem + 0.6vw, 1.375rem);
  --text-xl:   clamp(1.5rem, 1.25rem + 1vw, 2rem);
  --text-2xl:  clamp(1.9rem, 1.4rem + 2vw, 2.9rem);
  --text-3xl:  clamp(2.6rem, 1.5rem + 4.5vw, 5rem);

  --space-1: 0.25rem; --space-2: 0.5rem; --space-3: 0.75rem;
  --space-4: 1rem; --space-5: 1.25rem; --space-6: 1.5rem;
  --space-8: 2rem; --space-10: 2.5rem; --space-12: 3rem;
  --space-16: 4rem; --space-20: 5rem; --space-24: 6rem;

  --transition-interactive: 160ms cubic-bezier(0.16, 1, 0.3, 1);
  --pad-section: clamp(4rem, 8vw, 6.5rem);
  --pad-card: clamp(1.5rem, 3vw, 2.5rem);

  color-scheme: dark;
}

[data-theme="light"] {
  --color-bg:              #f2f4f3;
  --color-surface:         #f8faf9;
  --color-surface-2:       #eceeed;
  --color-divider:         #d9dfdc;
  --color-border:          #c0c9c5;
  --color-text:            #171d1b;
  --color-text-muted:      #5c6662;
  --color-text-faint:      #a3aca8;
  --color-text-inverse:    #f5f7f6;
  --color-primary:         #0b7c72;
  --color-primary-hover:   #095e57;
  --color-primary-highlight: #d7e8e4;
  color-scheme: light;
}

[data-density="compact"] {
  --pad-section: clamp(2.5rem, 5vw, 4rem);
  --pad-card: clamp(1rem, 2vw, 1.5rem);
}

/* ─── Base ─────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html {
  -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility; scroll-behavior: smooth;
  scroll-padding-top: 96px;
}
body {
  min-height: 100dvh; line-height: 1.65; font-family: var(--font-body);
  font-size: var(--text-base); color: var(--color-text); background-color: var(--color-bg);
  font-feature-settings: "kern", "liga", "calt";
}
img, picture, video, canvas, svg { display: block; max-width: 100%; height: auto; }
h1, h2, h3, h4, h5, h6 { text-wrap: balance; line-height: 1.12; font-weight: 700; letter-spacing: -0.02em; }
p { text-wrap: pretty; max-width: 72ch; }
::selection { background: var(--color-primary); color: var(--color-text-inverse); }
:focus-visible { outline: 2px solid var(--color-primary); outline-offset: 3px; }
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important; animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important; scroll-behavior: auto !important;
  }
}
button { cursor: pointer; background: none; border: none; font: inherit; color: inherit; }
a, button, [role="button"] {
  transition: color var(--transition-interactive), background var(--transition-interactive),
              border-color var(--transition-interactive), opacity var(--transition-interactive);
}
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border-width: 0; }
.mono { font-family: var(--font-mono); font-feature-settings: "tnum"; }

.skip-link { position: absolute; top: -100%; left: var(--space-4); padding: var(--space-2) var(--space-4);
  background: var(--color-primary); color: var(--color-text-inverse);
  font-family: var(--font-mono); font-size: var(--text-sm); font-weight: 500; text-decoration: none; z-index: 1000; }
.skip-link:focus { top: var(--space-4); }

/* Scroll reveal */
.reveal { opacity: 0; transform: translateY(14px); transition: opacity 480ms ease, transform 480ms ease; }
.reveal.visible { opacity: 1; transform: none; }

/* ─── Header / nav ─────────────────────────────────────── */
header.site-header {
  position: sticky; top: 0; z-index: 100;
  background: color-mix(in oklab, var(--color-bg) 90%, transparent);
  backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--color-divider);
}
.nav-inner {
  max-width: var(--content-wide); margin-inline: auto;
  padding: 0 var(--space-8);
  height: 72px;
  display: flex; align-items: center; justify-content: space-between; gap: var(--space-8);
}
.brand { display: flex; align-items: baseline; gap: var(--space-4); text-decoration: none; color: var(--color-text); min-width: 0; }
.brand-sig { font-family: var(--font-mono); font-weight: 700; font-size: 0.94rem; letter-spacing: 0.04em; white-space: nowrap; }
.brand-sig em { color: var(--color-primary); font-style: normal; }
.brand-role { font-family: var(--font-mono); font-size: 0.69rem; color: var(--color-text-muted); letter-spacing: 0.14em; white-space: nowrap; }

nav.primary ul { display: flex; gap: var(--space-8); list-style: none; }
.nav-link {
  font-family: var(--font-mono); font-size: 0.82rem; letter-spacing: 0.06em;
  text-decoration: none; color: var(--color-text-muted); padding: var(--space-2) 0;
}
.nav-link b { color: var(--color-primary); font-weight: 400; margin-right: 6px; }
.nav-link:hover { color: var(--color-text); }
.nav-link.active { color: var(--color-text); }
.nav-link.active b { font-weight: 700; }

.nav-actions { display: flex; align-items: center; gap: var(--space-3); }
.icon-btn {
  display: inline-flex; align-items: center; justify-content: center;
  width: 38px; height: 38px; border: 1px solid var(--color-divider); color: var(--color-text-muted);
}
.icon-btn:hover { color: var(--color-text); border-color: var(--color-border); }

.hamburger { display: none; flex-direction: column; gap: 5px; width: 38px; height: 38px;
  align-items: center; justify-content: center; border: 1px solid var(--color-divider); }
.hamburger span { display: block; width: 16px; height: 1.5px; background: var(--color-text); transition: transform 200ms ease, opacity 200ms ease; }
.hamburger[aria-expanded="true"] span:nth-child(1) { transform: translateY(6.5px) rotate(45deg); }
.hamburger[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.hamburger[aria-expanded="true"] span:nth-child(3) { transform: translateY(-6.5px) rotate(-45deg); }

.mobile-menu {
  display: none; position: fixed; top: 72px; left: 0; right: 0; z-index: 99;
  background: var(--color-bg); border-bottom: 1px solid var(--color-divider);
}
.mobile-menu.open { display: block; }
.mobile-menu a {
  display: block; padding: var(--space-4) var(--space-8); text-decoration: none;
  font-family: var(--font-mono); font-size: var(--text-sm); letter-spacing: 0.06em;
  color: var(--color-text); border-top: 1px solid var(--color-divider);
}
.mobile-menu a:hover { color: var(--color-primary); }

/* ─── Kickers / section shells ─────────────────────────── */
.section { padding: var(--pad-section) 0; }
.container { max-width: var(--content-default); margin-inline: auto; padding-inline: var(--space-8); }
.section-label {
  font-family: var(--font-mono); font-size: var(--text-xs); color: var(--color-primary);
  letter-spacing: 0.18em; text-transform: uppercase; margin-bottom: var(--space-6);
  display: flex; align-items: center; gap: var(--space-3);
}
.section-label::before { content: ""; width: 8px; height: 8px; background: var(--color-primary); flex: none; }
.section-title { font-size: var(--text-2xl); margin-bottom: var(--space-5); }
.section-intro { font-size: var(--text-lg); font-weight: 400; line-height: 1.6; color: var(--color-text-muted); max-width: 62ch; margin-bottom: var(--space-12); }

/* ─── Buttons ──────────────────────────────────────────── */
.btn-primary, .btn-outline {
  display: inline-flex; align-items: center; gap: var(--space-2);
  font-family: var(--font-mono); font-size: 0.85rem; letter-spacing: 0.04em; font-weight: 500;
  padding: 0.9rem 1.75rem; text-decoration: none;
}
.btn-primary { background: var(--color-primary); color: var(--color-text-inverse); border: 1px solid var(--color-primary); }
.btn-primary:hover { background: var(--color-primary-hover); border-color: var(--color-primary-hover); }
.btn-outline { background: transparent; color: var(--color-text); border: 1px solid var(--color-border); }
.btn-outline:hover { border-color: var(--color-primary); color: var(--color-primary); }

/* ─── Hero (home) ──────────────────────────────────────── */
#hero { border-bottom: 1px solid var(--color-divider); }
.hero-inner {
  max-width: var(--content-wide); margin-inline: auto;
  padding: clamp(3.5rem, 7vw, 5.5rem) var(--space-8) 0 var(--space-8);
  display: grid; grid-template-columns: 1fr 440px; gap: clamp(2.5rem, 5vw, 4.5rem);
  align-items: start;
}
.hero-kicker {
  font-family: var(--font-mono); font-size: var(--text-xs); color: var(--color-primary);
  letter-spacing: 0.18em; margin-bottom: var(--space-6);
  display: flex; align-items: center; gap: var(--space-3);
}
.hero-kicker::before { content: ""; width: 8px; height: 8px; background: var(--color-primary); flex: none; }
.hero-name { font-size: var(--text-3xl); line-height: 0.95; letter-spacing: -0.03em; margin-bottom: var(--space-8); }
.hero-name .dot { color: var(--color-primary); }
.hero-bio { font-size: var(--text-lg); font-weight: 400; line-height: 1.6; color: var(--color-text-muted); max-width: 52ch; margin-bottom: var(--space-5); }
.hero-bio strong { color: var(--color-text); font-weight: 500; }
.hero-current, .hero-status {
  font-family: var(--font-mono); font-size: 0.82rem; color: var(--color-text-muted);
  line-height: 1.8; max-width: none;
}
.hero-current b, .hero-status b { color: var(--color-primary); font-weight: 500; }
.hero-status { margin-bottom: var(--space-8); }
.hero-status .cursor { display: inline-block; width: 7px; height: 0.95em; background: var(--color-primary); margin-left: 6px; vertical-align: text-bottom; animation: blink 1.1s steps(1) infinite; }
@keyframes blink { 50% { opacity: 0; } }
.hero-actions { display: flex; flex-wrap: wrap; gap: var(--space-4); }

/* Terminal card — stays dark in both themes */
.hero-side { display: flex; flex-direction: column; gap: var(--space-4); }
.term { background: #101514; border: 1px solid #1f2825; }
.term-head {
  display: flex; justify-content: space-between; align-items: center; gap: var(--space-4);
  padding: var(--space-3) var(--space-5); border-bottom: 1px solid #1f2825;
  font-family: var(--font-mono); font-size: 0.72rem; color: #7a857f;
}
.term-head .st { color: #2dd4bf; display: flex; align-items: center; gap: 8px; white-space: nowrap; }
.term-head .st::before { content: ""; width: 6px; height: 6px; border-radius: 50%; background: #2dd4bf; }
.term pre { margin: 0; padding: var(--space-5); font-family: var(--font-mono); font-size: 0.78rem; line-height: 1.85; color: #9aa5a0; overflow-x: auto; }
.term .k { color: #5eead4; }
.term .s { color: #d6dbd8; }
.term .c { color: #4a5450; font-style: italic; }
.term .n { color: #f0abfc; }
.term-footnote {
  font-family: var(--font-mono); font-size: 0.75rem; color: var(--color-text-muted);
  text-decoration: none; letter-spacing: 0.02em;
}
.term-footnote:hover { color: var(--color-primary); }

/* Stats row */
.hero-meta {
  max-width: var(--content-wide); margin: clamp(3rem, 6vw, 4.5rem) auto 0 auto;
  padding: 0 var(--space-8);
  display: grid; grid-template-columns: repeat(4, 1fr);
  border-top: 1px solid var(--color-divider);
}
.hero-meta > div { padding: var(--space-8) 0 0 var(--space-6); border-left: 1px solid var(--color-divider); }
.hero-meta > div:first-child { border-left: none; padding-left: 0; }
.hero-stat-num { font-family: var(--font-mono); font-size: clamp(1.8rem, 3vw, 2.75rem); font-weight: 700; letter-spacing: -0.02em; }
.hero-stat-label { font-family: var(--font-mono); font-size: 0.69rem; color: var(--color-text-muted); letter-spacing: 0.12em; text-transform: uppercase; margin-top: var(--space-2); }

/* Org logo strip */
.hero-orgs {
  max-width: var(--content-wide); margin: clamp(2.5rem, 5vw, 4rem) auto 0 auto;
  padding: var(--space-6) var(--space-8);
  border-top: 1px solid var(--color-divider);
  display: flex; align-items: center; gap: clamp(1.5rem, 4vw, 3rem); flex-wrap: wrap;
}
.hero-orgs-label { font-family: var(--font-mono); font-size: 0.69rem; color: var(--color-text-faint); letter-spacing: 0.14em; white-space: nowrap; }
.hero-org-logo {
  display: inline-block; height: 20px; background: var(--color-text-muted); opacity: 0.75;
  -webkit-mask-size: contain; mask-size: contain;
  -webkit-mask-repeat: no-repeat; mask-repeat: no-repeat;
  -webkit-mask-position: center; mask-position: center;
}

/* Contact bar (home) */
.contact-bar { border-top: 1px solid var(--color-divider); }
.contact-bar-inner {
  max-width: var(--content-wide); margin-inline: auto; padding: var(--space-8);
  display: flex; align-items: center; justify-content: space-between; gap: var(--space-6); flex-wrap: wrap;
}
.contact-bar-label { font-family: var(--font-mono); font-size: 0.82rem; color: var(--color-text-muted); letter-spacing: 0.04em; }
.contact-bar-label b { color: var(--color-text); font-weight: 500; }

/* ─── Experience ───────────────────────────────────────── */
.experience-layout { display: grid; grid-template-columns: 240px 1fr; gap: clamp(2rem, 4vw, 4rem); align-items: start; }
.experience-rail { position: sticky; top: 96px; }
.rail-title { font-family: var(--font-mono); font-size: var(--text-xs); color: var(--color-text-faint); letter-spacing: 0.18em; text-transform: uppercase; margin-bottom: var(--space-4); }
.exp-nav-list { list-style: none; }
.exp-nav-item a {
  display: block; padding: var(--space-3) 0 var(--space-3) var(--space-4);
  border-left: 1px solid var(--color-divider);
  font-family: var(--font-mono); font-size: 0.78rem; letter-spacing: 0.02em;
  color: var(--color-text-muted); text-decoration: none; line-height: 1.5;
}
.exp-nav-item a small { display: block; font-size: 0.69rem; color: var(--color-text-faint); }
.exp-nav-item a:hover { color: var(--color-text); }
.exp-nav-item a.active { color: var(--color-primary); border-left-color: var(--color-primary); }

.job-list { display: flex; flex-direction: column; gap: var(--space-8); }
.job-card { border: 1px solid var(--color-divider); background: var(--color-surface); padding: var(--pad-card); }
.job-card[data-current="true"] { border-color: var(--color-border); }
.job-header { display: flex; justify-content: space-between; align-items: start; gap: var(--space-6); margin-bottom: var(--space-6); }
.job-title { font-size: var(--text-xl); letter-spacing: -0.02em; }
.job-org-row { display: flex; gap: var(--space-4); margin-top: var(--space-2); font-family: var(--font-mono); font-size: 0.78rem; }
.job-org { color: var(--color-primary); }
.job-loc { color: var(--color-text-faint); }
.job-dates-stack { display: flex; flex-direction: column; align-items: flex-end; gap: var(--space-2); flex: none; }
.job-dates { font-family: var(--font-mono); font-size: 0.78rem; color: var(--color-text-muted); white-space: nowrap; }
.job-current-pill {
  font-family: var(--font-mono); font-size: 0.66rem; letter-spacing: 0.14em; text-transform: uppercase;
  color: var(--color-primary); border: 1px solid var(--color-primary); padding: 3px 10px;
}
.job-bullets { list-style: none; display: flex; flex-direction: column; gap: var(--space-3); margin-bottom: var(--space-6); }
.job-bullets li { padding-left: var(--space-6); position: relative; color: var(--color-text); line-height: 1.6; }
.job-bullets li::before { content: ""; position: absolute; left: 0; top: 0.62em; width: 10px; height: 1.5px; background: var(--color-primary); }
.job-bullets b { color: var(--color-primary); font-weight: 500; }
.job-narrative { display: flex; flex-direction: column; gap: var(--space-4); margin-bottom: var(--space-6); }
.job-narrative p { font-size: var(--text-sm); line-height: 1.75; color: var(--color-text-muted); }

.skill-tags { display: flex; flex-wrap: wrap; gap: var(--space-2); }
.skill-tag, .skill-chip {
  font-family: var(--font-mono); font-size: 0.72rem; letter-spacing: 0.04em;
  border: 1px solid var(--color-border); color: var(--color-text-muted); padding: 5px 12px;
}

/* Credentials */
.creds-grid { display: grid; grid-template-columns: 1fr 1.4fr; gap: clamp(2rem, 4vw, 4rem); align-items: start; }
.col-title { font-family: var(--font-mono); font-size: var(--text-xs); font-weight: 500; color: var(--color-text-faint); letter-spacing: 0.18em; text-transform: uppercase; margin-bottom: var(--space-5); }
.edu-list { display: flex; flex-direction: column; }
.edu-card { display: flex; justify-content: space-between; align-items: start; gap: var(--space-4); padding: var(--space-5) 0; border-top: 1px solid var(--color-divider); }
.edu-degree { font-size: var(--text-base); font-weight: 500; letter-spacing: 0; }
.edu-institution { font-family: var(--font-mono); font-size: 0.75rem; color: var(--color-text-muted); margin-top: var(--space-1); }
.edu-year { font-family: var(--font-mono); font-size: 0.75rem; color: var(--color-text-muted); white-space: nowrap; }
.edu-year[data-status="in-progress"] { color: var(--color-primary); }

.cert-grid { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-3); }
.cert-card { display: flex; align-items: center; gap: var(--space-4); border: 1px solid var(--color-divider); background: var(--color-surface); padding: var(--space-4) var(--space-5); }
.cert-badge {
  font-family: var(--font-mono); font-size: 0.72rem; font-weight: 700; letter-spacing: 0.06em;
  color: var(--color-primary); border: 1px solid var(--color-primary); padding: 6px 10px; white-space: nowrap; flex: none;
}
.cert-name { font-size: 0.82rem; font-weight: 500; line-height: 1.4; }
.cert-issuer { font-family: var(--font-mono); font-size: 0.69rem; color: var(--color-text-faint); margin-top: 2px; }
.cert-stack { grid-column: 1 / -1; border: 1px solid var(--color-divider); padding: var(--space-4) var(--space-5); }
.cert-stack-label { font-family: var(--font-mono); font-size: 0.69rem; color: var(--color-text-faint); letter-spacing: 0.14em; text-transform: uppercase; margin-bottom: var(--space-3); }
.cert-stack-list { display: flex; flex-wrap: wrap; gap: var(--space-2); }
.cert-stack-list span { font-family: var(--font-mono); font-size: 0.72rem; color: var(--color-text-muted); border: 1px solid var(--color-border); padding: 4px 10px; }

/* ─── Skills page ──────────────────────────────────────── */
.skills-grid { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-6); }
.skill-group { border: 1px solid var(--color-divider); background: var(--color-surface); padding: var(--pad-card); }
.skill-group-head { display: flex; align-items: center; gap: var(--space-4); margin-bottom: var(--space-6); }
.skill-group-icon {
  display: inline-flex; align-items: center; justify-content: center;
  width: 36px; height: 36px; border: 1px solid var(--color-border); color: var(--color-primary); flex: none;
}
.skill-group-title { font-size: var(--text-lg); letter-spacing: -0.01em; flex: 1; }
.skill-group-num { font-family: var(--font-mono); font-size: var(--text-sm); color: var(--color-text-faint); }
.skill-list { display: flex; flex-wrap: wrap; gap: var(--space-2); margin-bottom: var(--space-6); }
.skill-narrative p { font-size: var(--text-sm); line-height: 1.75; color: var(--color-text-muted); }

/* ─── Publications ─────────────────────────────────────── */
.pub-list { list-style: none; border-top: 1px solid var(--color-divider); }
.pub-item { border-bottom: 1px solid var(--color-divider); padding: var(--space-8) 0; }
.pub-link {
  display: grid; grid-template-columns: 72px 1fr auto; gap: var(--space-6); align-items: start;
  text-decoration: none; color: inherit;
}
.pub-num { font-family: var(--font-mono); font-size: var(--text-lg); color: var(--color-text-faint); line-height: 1.3; }
.pub-body { display: flex; flex-direction: column; gap: var(--space-2); }
.pub-kind { font-family: var(--font-mono); font-size: 0.69rem; color: var(--color-primary); letter-spacing: 0.16em; text-transform: uppercase; }
.pub-title { font-size: var(--text-xl); font-weight: 700; letter-spacing: -0.02em; line-height: 1.25; }
.pub-link:hover .pub-title { color: var(--color-primary); }
.pub-source { font-family: var(--font-mono); font-size: 0.75rem; color: var(--color-text-muted); }
.pub-arrow { color: var(--color-text-faint); padding-top: var(--space-2); }
.pub-link:hover .pub-arrow { color: var(--color-primary); }
.pub-summary { margin-top: var(--space-4); margin-left: calc(72px + var(--space-6)); font-size: var(--text-sm); line-height: 1.75; color: var(--color-text-muted); max-width: 68ch; }

/* ─── Contact ──────────────────────────────────────────── */
.contact-section-inner { max-width: var(--content-narrow); margin-inline: auto; padding-inline: var(--space-8); }
.lede { font-size: var(--text-lg); font-weight: 400; line-height: 1.6; color: var(--color-text-muted); margin-bottom: var(--space-10); }
.contact-links { display: flex; flex-direction: column; gap: var(--space-4); }
.contact-link-card {
  display: flex; align-items: center; gap: var(--space-4);
  border: 1px solid var(--color-border); padding: var(--space-5) var(--space-6);
  text-decoration: none; color: var(--color-text);
}
.contact-link-card:hover { border-color: var(--color-primary); color: var(--color-primary); }
.contact-link-card svg { flex: none; }
.contact-link-body { display: flex; flex-direction: column; gap: 2px; }
.contact-link-name { font-family: var(--font-mono); font-size: 0.85rem; font-weight: 500; letter-spacing: 0.04em; }
.contact-link-note { font-family: var(--font-mono); font-size: 0.72rem; color: var(--color-text-muted); }

/* ─── Footer ───────────────────────────────────────────── */
footer.site-footer { border-top: 1px solid var(--color-divider); margin-top: var(--pad-section); }
.footer-inner {
  max-width: var(--content-wide); margin-inline: auto; padding: var(--space-6) var(--space-8);
  display: flex; align-items: center; justify-content: space-between; gap: var(--space-6); flex-wrap: wrap;
}
.footer-copy { font-family: var(--font-mono); font-size: 0.72rem; color: var(--color-text-faint); }
.footer-links { display: flex; flex-wrap: wrap; gap: var(--space-6); }
.footer-links a { font-family: var(--font-mono); font-size: 0.72rem; letter-spacing: 0.04em; color: var(--color-text-muted); text-decoration: none; }
.footer-links a:hover { color: var(--color-primary); }

/* ─── Tweaks panel ─────────────────────────────────────── */
.tweaks-panel {
  position: fixed; right: var(--space-6); bottom: var(--space-6); z-index: 300;
  width: 264px; background: var(--color-surface); border: 1px solid var(--color-border);
  display: none;
}
.tweaks-panel.open { display: block; }
.tweaks-head { display: flex; align-items: center; justify-content: space-between; padding: var(--space-3) var(--space-4); border-bottom: 1px solid var(--color-divider); }
.tweaks-head h3 { font-family: var(--font-mono); font-size: 0.78rem; font-weight: 700; letter-spacing: 0.1em; text-transform: uppercase; }
.tweaks-close { color: var(--color-text-muted); display: inline-flex; }
.tweaks-close:hover { color: var(--color-text); }
.tweaks-body { padding: var(--space-4); display: flex; flex-direction: column; gap: var(--space-5); }
.tweak-section { display: flex; flex-direction: column; gap: var(--space-2); }
.tweak-label { font-family: var(--font-mono); font-size: 0.66rem; color: var(--color-text-faint); letter-spacing: 0.14em; text-transform: uppercase; }
.tweak-row { display: flex; gap: var(--space-2); }
.swatch { width: 26px; height: 26px; border: 1px solid var(--color-border); }
.swatch.active { outline: 2px solid var(--color-primary); outline-offset: 2px; }
.seg { display: flex; border: 1px solid var(--color-border); }
.seg button { flex: 1; font-family: var(--font-mono); font-size: 0.72rem; padding: 7px 0; color: var(--color-text-muted); }
.seg button.active { background: var(--color-primary); color: var(--color-text-inverse); }
.toggle-row { display: flex; align-items: center; justify-content: space-between; font-family: var(--font-mono); font-size: 0.75rem; color: var(--color-text-muted); }
.tweak-input {
  font-family: var(--font-mono); font-size: 0.75rem; color: var(--color-text);
  background: var(--color-bg); border: 1px solid var(--color-border); padding: var(--space-2) var(--space-3);
  resize: vertical;
}

/* ─── Back to top ──────────────────────────────────────── */
.back-to-top {
  position: fixed; right: var(--space-6); bottom: var(--space-6); z-index: 200;
  width: 42px; height: 42px; display: inline-flex; align-items: center; justify-content: center;
  border: 1px solid var(--color-border); background: var(--color-bg); color: var(--color-text-muted);
  opacity: 0; pointer-events: none; transition: opacity var(--transition-interactive);
}
.back-to-top.visible { opacity: 1; pointer-events: auto; }
.back-to-top:hover { color: var(--color-primary); border-color: var(--color-primary); }
.tweaks-panel.open ~ .back-to-top { display: none; }

/* ─── Responsive ───────────────────────────────────────── */
@media (max-width: 1080px) {
  .hero-inner { grid-template-columns: 1fr; }
  .hero-side { max-width: 560px; }
  .skills-grid { grid-template-columns: 1fr; }
  .creds-grid { grid-template-columns: 1fr; }
}
@media (max-width: 1140px) {
  .brand-role { display: none; }
}
@media (max-width: 900px) {
  nav.primary { display: none; }
  .hamburger { display: inline-flex; }
  .experience-layout { grid-template-columns: 1fr; }
  .experience-rail { position: static; display: none; }
}
@media (max-width: 640px) {
  .nav-inner { padding-inline: var(--space-5); }
  .container, .contact-section-inner { padding-inline: var(--space-5); }
  .hero-inner, .hero-meta, .hero-orgs, .contact-bar-inner, .footer-inner { padding-inline: var(--space-5); }
  .hero-meta { grid-template-columns: 1fr 1fr; }
  .hero-meta > div { border-left: none; padding-left: 0; padding-top: var(--space-5); }
  .job-header { flex-direction: column; }
  .job-dates-stack { align-items: flex-start; flex-direction: row; }
  .cert-grid { grid-template-columns: 1fr; }
  .pub-link { grid-template-columns: 1fr auto; }
  .pub-num { display: none; }
  .pub-summary { margin-left: 0; }
}