/* davidrivera.me — single page, no framework */

:root{
  --ground:#F1F3EE; --surface:#FFFFFF; --sunk:#E6E9E2;
  --ink:#1A1F1C; --muted:#58625C; --rule:#D3D8D0;
  --accent:#2C6B66; --accent-ink:#FFFFFF; --accent-soft:#D5E7E4;
  --stale:#8A5A00; --stale-bg:#F6EBD2;
  --polish:#3C5A8A; --polish-bg:#E0E7F3;
  --calc:#2A2D33; --calc-edge:#1C1E22; --lcd:#B7C1A3; --lcd-ink:#1E281A;
  --display:"Bricolage Grotesque","Helvetica Neue",Arial,sans-serif;
  --body:"IBM Plex Sans","Segoe UI",system-ui,sans-serif;
  --mono:"IBM Plex Mono",ui-monospace,"SFMono-Regular",Menlo,monospace;
  --pixel:"VT323","IBM Plex Mono",ui-monospace,monospace;
}
@media (prefers-color-scheme:dark){
  :root{
    --ground:#111513; --surface:#181D1A; --sunk:#0C0F0D;
    --ink:#E6EAE5; --muted:#9AA59E; --rule:#2B332E;
    --accent:#7CC0B9; --accent-ink:#0E1A18; --accent-soft:#1E3432;
    --stale:#E2B45A; --stale-bg:#352A12;
    --polish:#9DB7E6; --polish-bg:#1C2638;
  }
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;background:var(--ground);color:var(--ink);
  font-family:var(--body);font-size:16px;line-height:1.6;
  padding-inline:20px;padding-block:0;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
h1,h2,h3,h4,h5{font-family:var(--display);line-height:1.1;text-wrap:balance;margin:0}
p{margin:0}
a{color:var(--accent)}
a:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:3px}
.wrap{max-width:1120px;margin-inline:auto}
.eyebrow{font-family:var(--mono);font-size:12px;letter-spacing:.08em;text-transform:uppercase;color:var(--muted)}
.skip{position:absolute;left:-9999px}
.skip:focus{left:20px;top:10px;z-index:9;background:var(--surface);color:var(--ink);padding:8px 14px;border-radius:6px;border:1px solid var(--rule)}

/* nav */
.nav{display:flex;align-items:center;justify-content:space-between;gap:16px 24px;flex-wrap:wrap;padding-block:18px;border-bottom:1px solid var(--rule)}
.brand{font-family:var(--display);font-weight:700;font-size:18px;color:var(--ink);text-decoration:none}
.nav-links{display:flex;gap:18px;font-size:14px;flex-wrap:wrap}
.nav-links a{color:var(--muted);text-decoration:none}
.nav-links a:hover{color:var(--ink)}
.nav-links a.cv{color:var(--ink);font-weight:600}

/* hero */
.hero{display:grid;grid-template-columns:1.25fr 1fr;gap:48px;align-items:center;padding-block:64px 56px}
.hero h1{font-size:clamp(34px,5.4vw,62px);font-weight:800;letter-spacing:-.025em;margin-top:14px}
.hero h1 em{font-style:normal;color:var(--accent)}
.lede{margin-top:18px;font-size:clamp(16px,1.4vw,18px);color:var(--muted);max-width:52ch}
.ctas{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px}
.btn{font:600 15px var(--body);text-decoration:none;padding:11px 18px;border-radius:8px;display:inline-flex;align-items:center;gap:8px}
.btn.primary{background:var(--accent);color:var(--accent-ink)}
.btn.ghost{border:1px solid var(--rule);color:var(--ink);background:var(--surface)}

/* TI-83 */
.calc-fig{margin:0;display:grid;justify-items:end}
.calc{background:linear-gradient(180deg,var(--calc) 0%,var(--calc-edge) 100%);border-radius:18px 18px 28px 28px;padding:18px 18px 22px;box-shadow:inset 0 1px 0 rgba(255,255,255,.08),0 20px 30px -18px rgba(0,0,0,.5);max-width:360px;width:100%;justify-self:end}
.calc-top{display:flex;justify-content:space-between;font-family:var(--mono);font-size:10px;letter-spacing:.14em;color:#8C929C;margin-bottom:10px}
.lcd{background:var(--lcd);color:var(--lcd-ink);font-family:var(--pixel);font-size:21px;line-height:1.08;padding:12px 14px;border-radius:4px;box-shadow:inset 0 2px 6px rgba(0,0,0,.35);background-image:repeating-linear-gradient(0deg,rgba(0,0,0,.035) 0 1px,transparent 1px 3px);min-height:190px;overflow:hidden}
.lcd .cur{display:inline-block;width:.5em;height:.85em;background:var(--lcd-ink);vertical-align:-.08em;animation:blink 1.1s steps(1) infinite}
@keyframes blink{50%{opacity:0}}
.keys{display:grid;grid-template-columns:repeat(5,1fr);gap:7px;margin-top:14px}
.keys span{font-family:var(--mono);font-size:9.5px;text-align:center;color:#D9DCE1;background:#3B3F47;border-radius:4px;padding:5px 0;box-shadow:0 2px 0 #15171a}
.keys span.hot{background:#5E9C97;color:#0F1B1A;font-weight:500}
.calc-cap{font-family:var(--mono);font-size:12px;color:var(--muted);margin-top:10px;text-align:right}

/* sections */
.sec{padding-block:56px;border-top:1px solid var(--rule)}
.sec-head{display:flex;flex-wrap:wrap;justify-content:space-between;align-items:baseline;gap:8px 20px;margin-bottom:28px}
.sec-head h2{font-size:clamp(26px,3.2vw,36px);font-weight:700;letter-spacing:-.015em}
.sec-head p{color:var(--muted);font-size:14px}

/* work */
.feature{display:grid;grid-template-columns:1.1fr 1fr;gap:36px;align-items:center;padding-block:22px}
.feature+.feature{border-top:1px dashed var(--rule)}
.shot{border-radius:10px;overflow:hidden;border:1px solid var(--rule);background:var(--sunk);aspect-ratio:16/9;max-width:100%}
.shot img{width:100%;height:100%;object-fit:cover}
.term{max-width:100%;border-radius:10px;background:#15191A;color:#CFE3DF;font-family:var(--mono);font-size:clamp(12px,1.05vw,13px);line-height:1.7;padding:22px 20px;margin:0}
.term>div{overflow-wrap:anywhere}
.term>div.gap{margin-top:1.2em}
.term .p{color:#7CC0B9}
.term .d{color:#7F8C88}
.f-meta{display:flex;flex-wrap:wrap;gap:8px;align-items:center;margin-bottom:10px}
.status{font-family:var(--mono);font-size:11px;letter-spacing:.05em;text-transform:uppercase;padding:2px 8px;border-radius:999px;display:inline-flex;align-items:center;gap:6px}
.status::before{content:"";width:6px;height:6px;border-radius:50%;background:currentColor}
.status.live{color:var(--accent);background:var(--accent-soft)}
.status.off{color:var(--stale);background:var(--stale-bg)}
.status.current{color:var(--polish);background:var(--polish-bg)}
.feature h3{font-size:26px;font-weight:700;letter-spacing:-.01em}
.what{margin-top:10px;color:var(--muted);max-width:52ch}
.role{margin-top:8px;font-size:14px;color:var(--muted)}
.role b{color:var(--ink);font-weight:600}
.tags{display:flex;flex-wrap:wrap;gap:6px;margin-top:14px;list-style:none;padding:0}
.tags li{font-family:var(--mono);font-size:12px;color:var(--ink);border:1px solid var(--rule);border-radius:4px;padding:1px 7px}
.f-links{display:flex;flex-wrap:wrap;gap:18px;margin-top:16px;font-weight:600;font-size:14px}
.f-links a{text-decoration:none}
.f-links a::after{content:" \2192"}

.earlier{margin-top:34px}
.earlier h3{font-family:var(--mono);font-weight:500;font-size:12px;letter-spacing:.08em;text-transform:uppercase;color:var(--muted);margin-bottom:6px}
.earlier>p{color:var(--muted);font-size:14px;margin-bottom:16px;max-width:60ch}
.mini{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;list-style:none;margin:0;padding:0}
.mini>li{display:grid;gap:8px;align-content:start}
.mini h4{font-family:var(--display);font-size:18px;font-weight:700;margin:4px 0 0}
.mini p{font-size:14px;color:var(--muted)}
.mini .f-links{margin-top:2px;font-size:13px}

/* stats (iRepairIT card) */
.stats{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin:0;padding:0;list-style:none}
.stats li{background:var(--surface);border:1px solid var(--rule);border-radius:10px;padding:16px 14px}
.stats b{display:block;font-family:var(--display);font-size:clamp(20px,2.2vw,27px);font-weight:800;color:var(--accent);letter-spacing:-.02em;line-height:1.1}
.stats span{display:block;font-size:13px;color:var(--muted);margin-top:6px;line-height:1.45}

/* experience */
.exp{list-style:none;margin:0;padding:0;border-top:1px solid var(--rule)}
.exp>li{display:grid;grid-template-columns:180px 1fr;gap:4px 28px;padding-block:22px;border-bottom:1px solid var(--rule)}
.exp .when{font-family:var(--mono);font-size:12px;letter-spacing:.05em;text-transform:uppercase;color:var(--muted);padding-top:5px}
.exp h3{font-size:19px;font-weight:700;letter-spacing:-.01em}
.exp h3 .org{color:var(--accent)}
.exp p{color:var(--muted);font-size:15px;margin-top:8px;max-width:64ch}
.exp .tags{margin-top:12px}
.exp li.pause h3{font-weight:600;font-family:var(--body);font-size:16px}
.exp li.pause p{margin-top:4px}

/* about */
.about{display:grid;grid-template-columns:.9fr 1.1fr;gap:44px;align-items:start}
.about figure{margin:0}
.about img{border-radius:10px;border:1px solid var(--rule);aspect-ratio:4/3;object-fit:cover;width:100%}
.about figcaption{font-family:var(--mono);font-size:12px;color:var(--muted);margin-top:8px}
.prose{display:grid;gap:14px;max-width:60ch}
.prose p{font-size:16.5px}
.facts{display:grid;grid-template-columns:auto 1fr;gap:6px 18px;margin:8px 0 0;font-size:14px}
.facts dt{font-family:var(--mono);font-size:12px;color:var(--muted);text-transform:uppercase;letter-spacing:.06em;padding-top:2px}
.facts dd{margin:0}

.skills{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;margin-top:40px;padding-top:28px;border-top:1px dashed var(--rule)}
.skills h3{font-family:var(--mono);font-weight:500;font-size:12px;letter-spacing:.08em;text-transform:uppercase;color:var(--muted);margin-bottom:8px}
.skills ul{list-style:none;padding:0;margin:0;display:grid;gap:3px;font-size:15px}

/* contact */
.contact{display:grid;grid-template-columns:1.3fr 1fr;gap:40px;align-items:end}
.contact h2{font-size:clamp(30px,4.4vw,50px);font-weight:800;letter-spacing:-.02em;margin-top:10px}
.mail{display:inline-block;margin-top:18px;font-family:var(--display);font-size:clamp(19px,2.6vw,28px);font-weight:500;color:var(--ink);text-decoration-color:var(--accent);text-underline-offset:6px;text-decoration-thickness:2px;word-break:break-word}
.elsewhere{display:grid;gap:10px;justify-items:start}
.elsewhere a{font-weight:600;text-decoration:none;font-size:15px}
.foot{display:flex;flex-wrap:wrap;justify-content:space-between;gap:8px;padding-block:22px;border-top:1px solid var(--rule);font-size:13px;color:var(--muted)}

@media (max-width:820px){
  .hero{grid-template-columns:1fr;gap:34px;padding-block:40px}
  .calc-fig{justify-items:start}
  .calc{justify-self:start;max-width:320px}
  .calc-cap{text-align:left}
  .feature{grid-template-columns:1fr;gap:18px}
  .mini{grid-template-columns:1fr}
  .about{grid-template-columns:1fr;gap:24px}
  .skills{grid-template-columns:repeat(2,1fr)}
  .exp>li{grid-template-columns:1fr;gap:2px}
  .exp .when{padding-top:0}
  .stats{grid-template-columns:1fr}
  .contact{grid-template-columns:1fr;gap:24px}
  .lcd{font-size:19px;min-height:170px}
  .sec{padding-block:44px}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .lcd .cur{animation:none}
}