/* ═══════════════════════════════════════════════════════════════════
   André Barbosa — personal site
   Tokens → base → glass → layout → sections → motion → print
   ═══════════════════════════════════════════════════════════════════ */

/* ── Tokens (light is the base; dark redefines only tokens) ──────── */
:root {
  --ground:      #f2f4f6;
  --ground-2:    #e6eaee;
  --ink:         #0d1216;
  --ink-soft:    #3e4952;
  --muted:       #78838d;
  --accent:      #0b6b75;
  --accent-ink:  #eafcfb;
  --line:        rgba(13, 18, 22, 0.10);
  --line-strong: rgba(13, 18, 22, 0.18);

  /* glass */
  --glass:       rgba(255, 255, 255, 0.52);
  --glass-hover: rgba(255, 255, 255, 0.66);
  --glass-edge:  rgba(255, 255, 255, 0.92);
  --glass-rim:   rgba(13, 18, 22, 0.08);
  --glass-shadow: 0 1px 2px rgba(13, 18, 22, 0.04), 0 12px 40px -18px rgba(13, 18, 22, 0.28);
  --specular:    rgba(255, 255, 255, 0.55);

  /* ambient field */
  --field-opacity: 0.6;
  --field-blur: 60px;
  --veil: linear-gradient(180deg, rgba(242,244,246,0) 0%, rgba(242,244,246,0.5) 45%, rgba(242,244,246,0.94) 90%);

  --font-display: "Instrument Sans", "Helvetica Neue", Helvetica, Arial, sans-serif;
  --font-body:    "IBM Plex Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-mono:    "IBM Plex Mono", ui-monospace, "SF Mono", Menlo, Consolas, monospace;

  --radius-l: 22px;
  --radius-m: 16px;
  --radius-s: 10px;
  --gutter: clamp(16px, 5vw, 40px);
  --measure: 62ch;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);

  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --ground:      #070a0c;
    --ground-2:    #0e1418;
    --ink:         #eaf0f2;
    --ink-soft:    #aab6be;
    --muted:       #6f7c85;
    --accent:      #5fdbd9;
    --accent-ink:  #04191a;
    --line:        rgba(255, 255, 255, 0.10);
    --line-strong: rgba(255, 255, 255, 0.18);
    --glass:       rgba(18, 24, 28, 0.46);
    --glass-hover: rgba(24, 32, 37, 0.58);
    --glass-edge:  rgba(255, 255, 255, 0.22);
    --glass-rim:   rgba(255, 255, 255, 0.07);
    --glass-shadow: 0 1px 2px rgba(0,0,0,0.3), 0 20px 50px -20px rgba(0,0,0,0.7);
    --specular:    rgba(255, 255, 255, 0.16);
    --field-opacity: 0.62;
    --field-blur: 64px;
    --veil: linear-gradient(180deg, rgba(7,10,12,0) 0%, rgba(7,10,12,0.35) 50%, rgba(7,10,12,0.92) 95%);
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --ground:      #070a0c;
  --ground-2:    #0e1418;
  --ink:         #eaf0f2;
  --ink-soft:    #aab6be;
  --muted:       #6f7c85;
  --accent:      #5fdbd9;
  --accent-ink:  #04191a;
  --line:        rgba(255, 255, 255, 0.10);
  --line-strong: rgba(255, 255, 255, 0.18);
  --glass:       rgba(18, 24, 28, 0.46);
  --glass-hover: rgba(24, 32, 37, 0.58);
  --glass-edge:  rgba(255, 255, 255, 0.22);
  --glass-rim:   rgba(255, 255, 255, 0.07);
  --glass-shadow: 0 1px 2px rgba(0,0,0,0.3), 0 20px 50px -20px rgba(0,0,0,0.7);
  --specular:    rgba(255, 255, 255, 0.16);
  --field-opacity: 0.62;
  --field-blur: 64px;
  --veil: linear-gradient(180deg, rgba(7,10,12,0) 0%, rgba(7,10,12,0.35) 50%, rgba(7,10,12,0.92) 95%);
  color-scheme: dark;
}

/* ── Base ────────────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--ground);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}
a { color: inherit; }
h1, h2, h3 { margin: 0; text-wrap: balance; }
p, ul, ol, dl { margin: 0; }
ul, ol { padding: 0; list-style: none; }
img, svg { max-width: 100%; display: inline-block; vertical-align: middle; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 6px; }

.skip {
  position: absolute; left: 16px; top: -60px; z-index: 100;
  padding: 8px 14px; background: var(--ink); color: var(--ground);
  border-radius: 8px; font-size: 14px; text-decoration: none;
}
.skip:focus { top: 16px; }

/* ── Ambient field (canvas) ──────────────────────────────────────── */
#field {
  position: fixed; inset: -12vh -12vw;
  width: calc(100vw + 24vw); height: calc(100vh + 24vh);
  z-index: 0; pointer-events: none;
  filter: blur(var(--field-blur)) saturate(1.25);
  opacity: calc(var(--field-opacity) * var(--scroll-fade, 1));
  transition: opacity .2s linear;
  transform: translateZ(0);
}
.field-veil {
  position: fixed; inset: 0; z-index: 0; pointer-events: none;
  background: var(--veil);
}
main { position: relative; z-index: 1; }

/* ── Glass primitive ─────────────────────────────────────────────── */
.glass {
  position: relative;
  background: var(--glass);
  -webkit-backdrop-filter: blur(22px) saturate(170%);
  backdrop-filter: blur(22px) saturate(170%);
  border: 1px solid var(--glass-rim);
  box-shadow: inset 0 1px 0 var(--glass-edge), var(--glass-shadow);
  transition: background .35s var(--ease), box-shadow .35s var(--ease), transform .35s var(--ease);
}
/* top-edge sheen */
.glass::before {
  content: ""; position: absolute; inset: 0; border-radius: inherit; pointer-events: none;
  background: linear-gradient(180deg, rgba(255,255,255,0.28) 0%, rgba(255,255,255,0) 38%);
  opacity: .8;
}
/* cursor-following specular highlight */
.glass::after {
  content: ""; position: absolute; inset: 0; border-radius: inherit; pointer-events: none;
  background: radial-gradient(240px circle at var(--mx, 50%) var(--my, 0%), var(--specular), transparent 62%);
  opacity: 0; transition: opacity .45s var(--ease);
}
.glass:hover::after { opacity: 1; }
.glass > * { position: relative; z-index: 1; }

/* ── Nav ─────────────────────────────────────────────────────────── */
.nav {
  position: fixed; top: 14px; left: 50%; transform: translateX(-50%);
  z-index: 50;
  display: flex; align-items: center; gap: 4px;
  padding: 6px 6px 6px 16px;
  border-radius: 999px;
  max-width: calc(100vw - 32px);
}
.nav.is-scrolled { background: var(--glass-hover); }
.nav-name {
  font-family: var(--font-display); font-weight: 600; font-size: 15px;
  letter-spacing: -0.01em; text-decoration: none; margin-right: 10px; white-space: nowrap;
}
.nav-links { display: flex; gap: 2px; }
.nav-links a {
  display: block; padding: 7px 12px; border-radius: 999px;
  font-size: 14px; color: var(--ink-soft); text-decoration: none;
  transition: background .25s var(--ease), color .25s var(--ease);
}
.nav-links a:hover { background: var(--glass-rim); color: var(--ink); }
.theme-toggle {
  display: grid; place-items: center; width: 34px; height: 34px; margin-left: 6px;
  border: 0; border-radius: 999px; background: transparent; color: var(--ink-soft); cursor: pointer;
  transition: background .25s var(--ease), color .25s var(--ease);
}
.theme-toggle:hover { background: var(--glass-rim); color: var(--ink); }
.theme-toggle .t-moon { display: none; }
:root[data-theme="dark"] .theme-toggle .t-moon { display: block; }
:root[data-theme="dark"] .theme-toggle .t-sun,
:root[data-theme="dark"] .theme-toggle .t-rays { display: none; }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .theme-toggle .t-moon { display: block; }
  :root:not([data-theme="light"]) .theme-toggle .t-sun,
  :root:not([data-theme="light"]) .theme-toggle .t-rays { display: none; }
}

/* ── Layout ──────────────────────────────────────────────────────── */
.wrap {
  max-width: 1040px; margin: 0 auto;
  padding-inline: var(--gutter);
  padding-block: 116px 48px;
}

.eyebrow {
  font-family: var(--font-mono); font-size: 12px; font-weight: 500;
  letter-spacing: .12em; text-transform: uppercase; color: var(--muted);
}

.section {
  display: grid; grid-template-columns: 200px minmax(0, 1fr); gap: 24px 48px;
  padding-block: 44px; border-top: 1px solid var(--line);
}
.rail { position: sticky; top: 92px; align-self: start; }
.rail .eyebrow::before {
  content: ""; display: inline-block; width: 7px; height: 7px; border-radius: 50%;
  background: var(--accent); margin-right: 10px; vertical-align: 1px;
}
.body { min-width: 0; display: flex; flex-direction: column; gap: 22px; }

/* ── Hero ────────────────────────────────────────────────────────── */
.hero { display: flex; flex-direction: column; gap: 14px; padding-bottom: 56px; }
.hero h1 {
  font-family: var(--font-display); font-weight: 700;
  font-size: clamp(44px, 8vw, 84px); line-height: .98; letter-spacing: -0.035em;
  margin-top: 2px;
}
.hero-role {
  font-family: var(--font-display); font-weight: 500;
  font-size: clamp(18px, 2.4vw, 24px); letter-spacing: -0.012em; color: var(--accent);
}
.lead {
  max-width: var(--measure); font-size: clamp(17px, 1.9vw, 19.5px); line-height: 1.5;
  color: var(--ink-soft); margin-top: 6px;
}
.lead::first-letter { color: var(--ink); }

.spec {
  margin-top: 16px; padding: 4px 22px; border-radius: var(--radius-m);
  display: grid; grid-template-columns: repeat(3, minmax(0, 1fr));
}
.spec > div { padding: 14px 0; }
.spec > div + div { border-left: 1px solid var(--line); padding-left: 20px; }
.spec dt {
  font-family: var(--font-mono); font-size: 11.5px; font-weight: 500; letter-spacing: .1em;
  text-transform: uppercase; color: var(--muted); margin-bottom: 4px;
}
.spec dd { margin: 0; font-size: 14.5px; line-height: 1.4; color: var(--ink); }

.actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 10px; }
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 11px 18px; border-radius: 999px;
  font-family: var(--font-body); font-weight: 500; font-size: 14.5px;
  text-decoration: none; color: var(--ink); line-height: 1;
  transition: transform .3s var(--ease), background .3s var(--ease), box-shadow .3s var(--ease);
}
.btn:hover { transform: translateY(-1px); }
.btn.glass:hover { background: var(--glass-hover); }
.btn-primary {
  background: var(--accent); color: var(--accent-ink);
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.25), 0 8px 24px -10px var(--accent);
}
.btn-primary:hover { box-shadow: inset 0 1px 0 rgba(255,255,255,0.25), 0 12px 28px -10px var(--accent); }

/* ── Timeline ────────────────────────────────────────────────────── */
.timeline { display: flex; flex-direction: column; gap: 6px; }
.entry {
  display: grid; grid-template-columns: 150px minmax(0, 1fr); gap: 8px 28px;
  position: relative; padding: 18px 0 22px 0;
}
.entry + .entry { border-top: 1px solid var(--line); }
.when {
  font-family: var(--font-mono); font-size: 12.5px; font-weight: 500; color: var(--muted);
  font-variant-numeric: tabular-nums; letter-spacing: .02em; padding-top: 5px; white-space: nowrap;
}
.entry-main { display: flex; flex-direction: column; gap: 8px; min-width: 0; }
.entry h3 {
  font-family: var(--font-display); font-weight: 600; font-size: 20px; letter-spacing: -0.015em; line-height: 1.25;
}
.org { font-size: 15px; color: var(--ink); font-weight: 500; }
.org-sub { color: var(--muted); font-weight: 400; }
.points { display: flex; flex-direction: column; gap: 7px; margin-top: 4px; max-width: var(--measure); }
.points li { position: relative; padding-left: 18px; color: var(--ink-soft); font-size: 15.5px; }
.points li::before {
  content: ""; position: absolute; left: 0; top: .72em; width: 7px; height: 1.5px;
  background: var(--accent); border-radius: 1px;
}
.aside { margin-top: 6px; font-size: 14px; color: var(--muted); max-width: var(--measure); }
.thesis { font-size: 15.5px; color: var(--ink-soft); max-width: var(--measure); margin-top: 2px; }
.thesis em { color: var(--ink); font-style: italic; }
.tag {
  display: inline-block; font-family: var(--font-mono); font-size: 11px; font-weight: 500;
  letter-spacing: .1em; text-transform: uppercase; color: var(--accent);
  border: 1px solid currentColor; border-radius: 6px; padding: 2px 7px 1px; margin-right: 8px; vertical-align: 2px;
}

/* ── Cards ───────────────────────────────────────────────────────── */
.card {
  display: flex; flex-direction: column; gap: 10px;
  padding: 24px; border-radius: var(--radius-l); text-decoration: none; color: inherit;
}
.card:hover { background: var(--glass-hover); transform: translateY(-2px); }
.card-kicker {
  font-family: var(--font-mono); font-size: 11.5px; font-weight: 500; letter-spacing: .1em;
  text-transform: uppercase; color: var(--accent);
}
.card h3 {
  font-family: var(--font-display); font-weight: 600; font-size: 19px; letter-spacing: -0.015em; line-height: 1.28;
}
.card p:not(.card-kicker) { font-size: 15px; color: var(--ink-soft); }
.card-feature { padding: 30px 32px; gap: 12px; }
.card-feature h3 { font-size: clamp(21px, 2.6vw, 26px); max-width: 30ch; }
.card-feature p:not(.card-kicker) { max-width: var(--measure); font-size: 15.5px; }
.card-link {
  display: inline-flex; align-items: center; gap: 6px; margin-top: 6px;
  font-weight: 500; font-size: 14.5px; color: var(--accent);
}
.card-link svg { transition: transform .3s var(--ease); }
.card-feature:hover .card-link svg { transform: translate(2px, -2px); }
.card-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; }

/* ── Skills ──────────────────────────────────────────────────────── */
.skills { display: flex; flex-direction: column; }
.skill-row {
  display: grid; grid-template-columns: 170px minmax(0, 1fr); gap: 8px 28px;
  padding: 14px 0;
}
.skill-row + .skill-row { border-top: 1px solid var(--line); }
.skill-row dt {
  font-family: var(--font-mono); font-size: 12.5px; font-weight: 500; letter-spacing: .04em;
  color: var(--muted); padding-top: 6px;
}
.skill-row dd { margin: 0; display: flex; flex-wrap: wrap; gap: 7px; }
.skill-row dd span {
  display: inline-block; padding: 5px 11px; border-radius: 999px; font-size: 13.5px;
  color: var(--ink); background: var(--glass); border: 1px solid var(--glass-rim);
  box-shadow: inset 0 1px 0 var(--glass-edge);
  -webkit-backdrop-filter: blur(12px); backdrop-filter: blur(12px);
}

/* ── Contact ─────────────────────────────────────────────────────── */
.contact-panel { padding: 28px 30px; border-radius: var(--radius-l); display: flex; flex-direction: column; gap: 18px; }
.contact-lead {
  font-family: var(--font-display); font-weight: 600; font-size: clamp(20px, 2.6vw, 26px);
  letter-spacing: -0.02em; line-height: 1.25; max-width: 26ch;
}
.contact-list { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px 32px; }
.contact-list li { display: grid; grid-template-columns: 84px 1fr; gap: 12px; align-items: baseline; font-size: 15px; min-width: 0; }
.contact-list .k { font-family: var(--font-mono); font-size: 12px; letter-spacing: .06em; color: var(--muted); }
.contact-list a { color: var(--ink); text-decoration: none; border-bottom: 1px solid var(--line-strong); transition: border-color .25s; overflow-wrap: anywhere; }
.contact-list a:hover { border-color: var(--accent); }

/* ── Footer ──────────────────────────────────────────────────────── */
.foot {
  display: flex; justify-content: space-between; flex-wrap: wrap; gap: 8px 24px;
  padding-top: 28px; border-top: 1px solid var(--line);
  font-size: 13.5px; color: var(--muted);
}
.foot-meta { font-family: var(--font-mono); font-size: 12px; letter-spacing: .03em; }

/* ── Motion ──────────────────────────────────────────────────────── */
@keyframes rise { from { opacity: 0; transform: translateY(14px); } to { opacity: 1; transform: none; } }
.hero-a, .hero-b, .hero-c, .hero-d, .hero-e, .hero-f { animation: rise .7s var(--ease) both; }
.hero-b { animation-delay: .06s; } .hero-c { animation-delay: .12s; } .hero-d { animation-delay: .18s; }
.hero-e { animation-delay: .26s; } .hero-f { animation-delay: .32s; }

/* reveal: JS adds .will-reveal only to elements below the fold, so the
   page is fully visible at rest and without JS */
.will-reveal { opacity: 0; transform: translateY(16px); }
.will-reveal.is-in { opacity: 1; transform: none; transition: opacity .7s var(--ease), transform .7s var(--ease); }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .hero-a, .hero-b, .hero-c, .hero-d, .hero-e, .hero-f { animation: none; }
  .will-reveal { opacity: 1; transform: none; transition: none; }
  .glass, .btn, .card, .card-link svg { transition: none; }
  .glass::after { display: none; }
}

/* ── Responsive ──────────────────────────────────────────────────── */
@media (max-width: 860px) {
  .section { grid-template-columns: 1fr; gap: 14px; padding-block: 36px; }
  .rail { position: static; }
  .card-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 680px) {
  .wrap { padding-block: 96px 40px; }
  .nav { padding-left: 14px; }
  .nav-links { display: none; }
  .spec { grid-template-columns: 1fr; padding: 2px 18px; }
  .spec > div + div { border-left: 0; padding-left: 0; border-top: 1px solid var(--line); }
  .entry, .skill-row { grid-template-columns: 1fr; gap: 4px 0; }
  .when { padding-top: 0; }
  .skill-row dt { padding-top: 0; }
  .card-grid { grid-template-columns: 1fr; }
  .card-feature { padding: 24px; }
  .contact-panel { padding: 22px; }
  .contact-list { grid-template-columns: 1fr; }
}

/* ── Print: the page prints as a clean CV ────────────────────────── */
@media print {
  @page { size: A4; margin: 14mm; }
  :root { --ground: #fff; --ink: #111; --ink-soft: #333; --muted: #666; --accent: #0b6b75; --line: #ddd; }
  #field, .field-veil, .nav, .skip, .actions, .foot, .contact-lead { display: none !important; }
  body { font-size: 10.5pt; background: #fff; }
  .wrap { padding: 0; max-width: none; }
  .glass, .card, .spec, .contact-panel, .skill-row dd span {
    background: transparent !important; backdrop-filter: none !important; -webkit-backdrop-filter: none !important;
    box-shadow: none !important; border-color: #ddd !important;
  }
  .glass::before, .glass::after { display: none; }
  .hero { padding-bottom: 20px; gap: 6px; }
  .hero h1 { font-size: 26pt; }
  .hero-role { font-size: 13pt; }
  .lead { font-size: 11pt; }
  .spec { grid-template-columns: repeat(3, 1fr); padding: 0; border: 0; }
  .section { padding-block: 14px; gap: 6px 24px; grid-template-columns: 130px 1fr; break-inside: auto; }
  .rail { position: static; }
  .entry, .card, .skill-row { break-inside: avoid; }
  .card-grid { grid-template-columns: 1fr 1fr 1fr; gap: 10px; }
  .card { padding: 10px 0; border: 0; }
  .card-feature { padding: 10px 0; }
  .card-link { display: none; }
  .hero-a, .hero-b, .hero-c, .hero-d, .hero-e, .hero-f, .will-reveal { animation: none; opacity: 1; transform: none; }
  a { color: inherit; }
}