/* ─────────────────────────────────────────────────────────────
   Allen Alfonso — portfolio
   Visual system ported from KnowFindErs (kb-llm) — industrial
   "specimen-sheet": warm paper + ink, signal red, square corners,
   hard 1px rules, IBM Plex Mono labels, Space Grotesk display.
   ─────────────────────────────────────────────────────────── */

:root {
  --sans: "Space Grotesk", -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  --track-wide: 0.08em;
  --track-wider: 0.16em;
  --track-widest: 0.22em;
  --ease: cubic-bezier(0.2, 0, 0, 1);
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --dur-fast: 120ms;
  --dur-base: 180ms;
  --dur-slow: 280ms;
  --dur-slower: 420ms;
  --sidebar-w: 232px;
  --content-max: 1240px;
  --green: oklch(0.62 0.14 145);
  --amber: oklch(0.78 0.16 75);
  --dark-bg: #0b0b0b;
  --dark-fg: #f2f0eb;
  --dark-rule: #2a2a28;
}

:root,
:root[data-theme="light"] {
  --bg: #f2f0eb;
  --bg-alt: #e8e5dd;
  --bg-deep: #dcd8ce;
  --panel: #fbfaf7;
  --ink: #0b0b0b;
  --ink-2: #2a2a28;
  --ink-3: #4a4843;
  --ink-soft: #6b6864;
  --ink-faint: #8b8780;
  --rule: #c7c3b9;
  --rule-strong: #1a1a1a;
  --rule-soft: rgba(26, 26, 26, 0.18);
  --rule-dot: #b5b0a4;
  --red: oklch(0.62 0.22 27);
  --accent-hover: oklch(0.54 0.22 27);
  --red-soft: oklch(0.62 0.22 27 / 0.08);
  --success-fg: oklch(0.45 0.12 145);
  --selection: oklch(0.62 0.22 27 / 0.2);
  color-scheme: light;
}

:root[data-theme="dark"] {
  --bg: #0b0b0b;
  --bg-alt: #1a1a18;
  --bg-deep: #050505;
  --panel: #121210;
  --ink: #f2f0eb;
  --ink-2: #e8e5dd;
  --ink-3: #c7c3b9;
  --ink-soft: #98948a;
  --ink-faint: #6b6864;
  --rule: #3a3833;
  --rule-strong: #e8e5dd;
  --rule-soft: rgba(242, 240, 235, 0.25);
  --rule-dot: #3a3833;
  --red: oklch(0.62 0.22 27);
  --accent-hover: oklch(0.68 0.22 27);
  --red-soft: oklch(0.62 0.22 27 / 0.16);
  --success-fg: oklch(0.72 0.14 145);
  --selection: oklch(0.62 0.22 27 / 0.35);
  color-scheme: dark;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) {
    --bg: #0b0b0b;
    --bg-alt: #1a1a18;
    --bg-deep: #050505;
    --panel: #121210;
    --ink: #f2f0eb;
    --ink-2: #e8e5dd;
    --ink-3: #c7c3b9;
    --ink-soft: #98948a;
    --ink-faint: #6b6864;
    --rule: #3a3833;
    --rule-strong: #e8e5dd;
    --rule-soft: rgba(242, 240, 235, 0.25);
    --rule-dot: #3a3833;
    --accent-hover: oklch(0.68 0.22 27);
    --red-soft: oklch(0.62 0.22 27 / 0.16);
    --success-fg: oklch(0.72 0.14 145);
    --selection: oklch(0.62 0.22 27 / 0.35);
    color-scheme: dark;
  }
}

*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--ink-2);font-family:var(--sans);font-size:15px;line-height:1.55;-webkit-font-smoothing:antialiased}
::selection{background:var(--selection)}
img,video{max-width:100%;display:block}
a{color:inherit}
h1,h2,h3,p,ul,ol,dl,dd,figure{margin:0}
ul,ol{padding:0;list-style:none}
button{font:inherit}
.skip-link{position:absolute;left:-9999px;top:0;background:var(--ink);color:var(--bg);padding:8px 14px;font-family:var(--mono);font-size:11px;z-index:99}
.skip-link:focus{left:0}

.kf-dots{background-image:radial-gradient(circle,var(--rule-dot) 1px,transparent 1px);background-size:14px 14px}
.kf-eyebrow{font-family:var(--mono);font-size:10px;letter-spacing:var(--track-widest);text-transform:uppercase;color:var(--ink-soft)}
.kf-h2{font-family:var(--sans);font-weight:600;font-size:22px;line-height:1.1;letter-spacing:-.01em;color:var(--ink)}
.kf-h3{font-family:var(--sans);font-weight:600;font-size:15px;color:var(--ink)}
.kf-brand-mark{width:28px;height:28px;background:var(--ink);position:relative;flex:0 0 28px;display:inline-block}
.kf-brand-mark::before,.kf-brand-mark::after{content:"";position:absolute;background:var(--bg)}
.kf-brand-mark::before{left:6px;top:6px;width:6px;height:6px}
.kf-brand-mark::after{right:6px;bottom:6px;width:6px;height:6px;border-radius:50%}
.kf-card{background:var(--panel);border:1px solid var(--rule);display:flex;flex-direction:column}
.kf-card-h{padding:10px 14px;border-bottom:1px solid var(--rule);display:flex;justify-content:space-between;align-items:center;gap:10px;font-family:var(--mono);font-size:10px;letter-spacing:var(--track-wider);text-transform:uppercase;color:var(--ink)}
.kf-card-b{padding:16px}
.kf-btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:34px;padding:0 16px;border:1px solid var(--rule);background:var(--bg);font-family:var(--mono);font-size:11px;letter-spacing:var(--track-wide);text-transform:uppercase;cursor:pointer;color:var(--ink);text-decoration:none;border-radius:0;transition:background var(--dur-fast) var(--ease),color var(--dur-fast) var(--ease),border-color var(--dur-fast) var(--ease)}
.kf-btn:hover{background:var(--bg-alt)}
.kf-btn-fill{background:var(--ink);color:var(--bg);border-color:var(--ink)}
.kf-btn-fill:hover{background:var(--ink-2);color:var(--bg)}
.kf-btn-red{background:var(--red);border-color:var(--red);color:#fff}
.kf-btn-red:hover{background:var(--accent-hover);border-color:var(--accent-hover);color:#fff}
.kf-btn-ghost{border-color:transparent;background:transparent}
.kf-btn-ghost:hover{border-color:var(--rule-soft);background:transparent}
.kf-btn-sm{height:26px;padding:0 10px;font-size:10px}
.kf-tag{display:inline-flex;align-items:center;gap:6px;height:22px;padding:0 8px;border:1px solid var(--rule-soft);font-family:var(--mono);font-size:10px;letter-spacing:var(--track-wide);text-transform:uppercase;color:var(--ink-2);white-space:nowrap}
.kf-tag-red{color:var(--red);border-color:currentColor}
.kf-tag-green{color:var(--success-fg);border-color:currentColor}
.kf-tag-fill{background:var(--ink);color:var(--bg);border-color:var(--ink)}
.kf-led{display:inline-block;width:8px;height:8px;background:var(--green);border-radius:50%;box-shadow:0 0 0 2px color-mix(in oklch,var(--green) 30%,transparent)}

.sidebar{position:fixed;inset:0 auto 0 0;width:var(--sidebar-w);display:flex;flex-direction:column;justify-content:space-between;padding:24px 20px;border-right:1px solid var(--rule);background:var(--bg);z-index:10}
.main{margin-left:var(--sidebar-w)}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none}
.brand-name{font-family:var(--sans);font-weight:600;font-size:15px;color:var(--ink);line-height:1.15;display:flex;flex-direction:column}
.nav-burger{display:none}
.site-nav{margin-top:32px;display:flex;flex-direction:column}
.nav-label{font-family:var(--mono);font-size:9px;letter-spacing:var(--track-widest);text-transform:uppercase;color:var(--ink-faint);padding:0 8px 8px;border-bottom:1px solid var(--rule)}
.nav-link{display:flex;align-items:center;gap:10px;padding:9px 8px;border-bottom:1px solid var(--rule);font-family:var(--mono);font-size:11px;letter-spacing:var(--track-wider);text-transform:uppercase;text-decoration:none;color:var(--ink-3);box-shadow:inset 2px 0 0 transparent;transition:background var(--dur-fast) var(--ease),color var(--dur-fast) var(--ease),box-shadow var(--dur-fast) var(--ease),padding-left var(--dur-base) var(--ease-out)}
.nav-idx{color:var(--ink-faint);font-size:10px;transition:color var(--dur-fast) var(--ease)}
.nav-link:hover{background:var(--bg-alt);color:var(--ink);padding-left:12px}
.nav-link:hover .nav-idx{color:var(--red)}
.nav-link.is-active{background:var(--ink);color:var(--bg);padding-left:12px;box-shadow:inset 2px 0 0 var(--red)}
.nav-link.is-active .nav-idx{color:var(--red)}
.sidebar-bottom{display:flex;flex-direction:column;gap:14px}
.status-line{display:flex;align-items:center;gap:8px;font-family:var(--mono);font-size:9px;letter-spacing:var(--track-wider);text-transform:uppercase;color:var(--ink-soft)}
.theme-toggle{display:flex;border:1px solid var(--rule)}
.theme-btn{flex:1;height:28px;border:0;background:transparent;color:var(--ink-soft);font-family:var(--mono);font-size:10px;letter-spacing:var(--track-wider);cursor:pointer}
.theme-btn + .theme-btn{border-left:1px solid var(--rule)}
.theme-btn[aria-pressed="true"]{background:var(--ink);color:var(--bg)}
.sidebar-mail{font-family:var(--mono);font-size:10.5px;color:var(--ink-3);text-decoration:none;border-bottom:1px dashed var(--rule-soft);align-self:flex-start}

.hero{border-bottom:1px solid var(--rule-strong);position:relative}
.hero-inner{max-width:var(--content-max);margin:0 auto;padding:64px 48px 0}
.hero-grid{display:grid;grid-template-columns:1fr auto;gap:48px;align-items:start;padding:44px 0 52px}
.hero-name{font-family:var(--sans);font-weight:600;font-size:clamp(40px,6vw,62px);line-height:1.02;letter-spacing:-.02em;color:var(--ink)}
.hero-role{margin-top:18px;font-family:var(--mono);font-size:12px;letter-spacing:.04em;text-transform:uppercase;color:var(--ink-3)}
.hero-role em{font-style:normal;color:var(--red)}
.hero-summary{margin-top:18px;max-width:56ch;color:var(--ink-3)}
.hero-links{margin-top:26px;display:flex;flex-wrap:wrap;gap:10px}
.hero-glyph{text-align:center}
.glyph-frame{position:relative;padding:40px;border:1px solid var(--rule-strong);background:var(--panel)}
.glyph-frame--portrait{padding:18px}
#portraitCanvas{display:block;width:320px;height:320px;max-width:100%;cursor:crosshair}

.section{max-width:var(--content-max);margin:0 auto;padding:72px 48px 0}
.section-head{display:flex;align-items:baseline;gap:14px;margin-bottom:26px}
.section-idx{font-family:var(--mono);font-size:12px;color:var(--red)}
.section-title{font-family:var(--sans);font-weight:600;font-size:26px;letter-spacing:-.01em;color:var(--ink);white-space:nowrap}
.section-rule{flex:1;border-top:1px solid var(--rule);transform:translateY(-6px)}
.featured-lede{max-width:none;color:var(--ink-3)}
.tag-row{display:flex;flex-wrap:wrap;gap:6px;margin-top:14px}
.demo{margin-top:20px;display:grid;grid-template-columns:minmax(0,1fr) 264px;border:1px solid var(--rule-strong)}
.demo--single{grid-template-columns:1fr}
.demo-stage{position:relative;background:var(--dark-bg);min-height:200px;display:flex}
.demo-stage video{width:100%;aspect-ratio:16/10;object-fit:contain;background:var(--dark-bg)}
#reviewersDemo .demo-stage{justify-content:center;min-height:480px}
#reviewersDemo .demo-stage video{width:auto;height:100%;max-height:640px;aspect-ratio:1206/2622}
.demo-offline[hidden]{display:none}
.demo-offline{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:8px;background:var(--dark-bg);color:var(--dark-fg)}
.demo-offline .kf-eyebrow{color:var(--red)}
.demo-offline p{font-family:var(--mono);font-size:11px;color:#98948a}
.demo-chapters{border-left:1px solid var(--rule-strong);background:var(--panel);overflow-y:auto;max-height:480px}
.chapter{display:grid;grid-template-columns:auto 1fr auto;grid-template-areas:"idx name led" "idx desc led";align-items:center;column-gap:10px;width:100%;text-align:left;padding:10px 12px;border:0;border-bottom:1px solid var(--rule);background:transparent;cursor:pointer}
.chapter:hover,.chapter.is-active{background:var(--bg-alt)}
.ch-idx{grid-area:idx;font-family:var(--mono);font-size:10px;color:var(--ink-faint)}
.ch-name{grid-area:name;font-family:var(--mono);font-size:11px;letter-spacing:.04em;text-transform:uppercase;color:var(--ink)}
.ch-desc{grid-area:desc;font-family:var(--sans);font-size:11px;color:var(--ink-soft);line-height:1.35}
.ch-led{grid-area:led;width:8px;height:8px;border-radius:50%;border:1px solid var(--rule-soft)}
.chapter.is-active .ch-idx{color:var(--red)}
.chapter.is-active .ch-led{background:var(--green);border-color:transparent;box-shadow:0 0 0 2px color-mix(in oklch,var(--green) 30%,transparent)}
.feature-bullets{margin-top:20px;border-top:1px dashed var(--rule-soft)}
.feature-bullets li{padding:10px 0 10px 22px;border-bottom:1px dashed var(--rule-soft);position:relative;color:var(--ink-3);font-size:14px}
.feature-bullets li::before,.xp-bullets li::before{content:"";position:absolute;background:var(--red)}
.feature-bullets li::before{left:4px;top:17px;width:7px;height:7px}
.project-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(270px,1fr));gap:16px}
.project-card--wide{grid-column:1/-1}
.project-card p{margin-top:8px;font-size:13.5px;color:var(--ink-3)}
.mini-bullets{margin-top:10px}
.mini-bullets li{position:relative;padding:5px 0 5px 16px;font-size:12.5px;color:var(--ink-soft);line-height:1.45}
.mini-bullets li::before{content:"";position:absolute;left:2px;top:12px;width:5px;height:5px;background:var(--ink-faint)}
.xp{display:grid;grid-template-columns:180px 1fr;gap:24px;padding:24px 0;border-top:1px solid var(--rule)}
.xp:last-of-type{border-bottom:1px solid var(--rule)}
.xp-meta{display:flex;flex-direction:column;align-items:flex-start;gap:10px}
.xp-dates{font-family:var(--mono);font-size:11px;letter-spacing:var(--track-wide);color:var(--ink-soft)}
.xp-bullets{margin-top:12px}
.xp-bullets li{position:relative;padding:6px 0 6px 20px;color:var(--ink-3);font-size:14px;border-bottom:1px dashed var(--rule-soft)}
.xp-bullets li::before{left:2px;top:14px;width:6px;height:6px}
.stack-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.stack-card .tag-row{margin-top:0}
.cert-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:16px}
.cert-card{display:flex;flex-direction:column;align-items:center;text-align:center;gap:6px;padding:22px 16px 18px;background:var(--panel);border:1px solid var(--rule)}
.cert-card-icon{width:76px;height:76px;display:flex;align-items:center;justify-content:center;margin-bottom:8px}
.cert-card-icon img{max-width:100%;max-height:100%;width:auto;height:auto}
.cert-card-icon--logo{background:#fbfaf7;border:1px solid var(--rule);padding:12px}
.cert-card-title{font-family:var(--sans);font-weight:600;font-size:14.5px;line-height:1.3;color:var(--ink)}
.cert-card-issuer,.cert-card-date,.cert-card-verify{font-family:var(--mono);font-size:10px}
.cert-card-issuer{text-transform:uppercase;color:var(--ink-soft)}
.cert-card-date{color:var(--ink-faint)}
.cert-card-verify{margin-top:auto;padding-top:14px;text-transform:uppercase;color:var(--ink-3);text-decoration:none}
.edu-list{border-top:1px solid var(--rule)}
.edu-row{display:flex;justify-content:space-between;align-items:baseline;gap:16px;padding:18px 4px;border-bottom:1px solid var(--rule)}
.edu-school{margin-top:4px;font-size:13px;color:var(--ink-soft)}
.edu-dates{font-family:var(--mono);font-size:11px;color:var(--ink-soft);white-space:nowrap}
.contact{margin-top:80px;border-top:1px solid var(--rule-strong);text-align:center;padding:72px 48px 40px}
.contact-title{margin-top:14px;font-family:var(--sans);font-weight:600;font-size:clamp(30px,4.5vw,44px);line-height:1.05;letter-spacing:-.02em;color:var(--ink)}
.contact-title em{font-style:normal;color:var(--red)}
.contact-actions{margin-top:28px;display:flex;justify-content:center;flex-wrap:wrap;gap:10px}
.colophon{margin-top:56px;font-family:var(--mono);font-size:9px;letter-spacing:var(--track-wider);color:var(--ink-faint)}

.side-tools{display:flex;flex-direction:column;gap:2px;border-top:1px solid var(--rule);border-bottom:1px solid var(--rule);padding:6px 0}
.side-tool{display:flex;align-items:center;justify-content:space-between;gap:10px;padding:7px 8px;border:0;background:transparent;cursor:pointer;font-family:var(--mono);font-size:11px;letter-spacing:var(--track-wide);text-transform:uppercase;color:var(--ink-3)}
.kbd-combo{display:inline-flex;gap:3px}.kf-kbd{display:inline-flex;align-items:center;justify-content:center;min-width:18px;height:18px;padding:0 4px;border:1px solid var(--rule-soft);border-bottom-width:2px;font-family:var(--mono);font-size:10px;background:var(--bg);color:var(--ink-soft)}
.overlay{position:fixed;inset:0;z-index:100;display:flex;align-items:flex-start;justify-content:center;padding:12vh 20px 20px;background:color-mix(in oklch,var(--bg-deep) 74%,transparent);backdrop-filter:blur(3px)}
.overlay[hidden]{display:none}.overlay-panel{width:100%;max-width:560px}.overlay-panel--wide{max-width:720px}.overlay-foot{display:flex;justify-content:space-between;padding:8px 14px;border-top:1px solid var(--rule);font-family:var(--mono);font-size:9px;color:var(--ink-faint)}
.ask-overlay{position:fixed;inset:0;z-index:100;display:flex;align-items:center}.ask-overlay[hidden]{display:none}.ask-backdrop{position:absolute;inset:0;background:color-mix(in srgb,var(--bg) 82%,transparent);backdrop-filter:blur(12px)}
.ask-content{position:relative;z-index:1;display:flex;flex-direction:column;align-items:flex-start;gap:20px;width:100%;max-width:760px;padding-left:clamp(24px,9vw,116px);padding-right:24px}
.ask-bubble{font-family:var(--mono);font-size:15px;line-height:1.4;color:var(--ink);background:var(--bg-alt);border:1px solid var(--rule);padding:9px 14px;max-width:100%}.ask-bubble[hidden]{display:none}
.ask-head{display:flex;align-items:center;gap:16px}.ask-title{font-family:var(--mono);font-weight:400;font-size:clamp(21px,2.4vw,31px);line-height:1.3;color:var(--ink)}.ask-title--muted{color:var(--ink-soft)}
.ask-loader{flex:0 0 16px;width:16px;height:16px;border:2px solid var(--rule);border-top-color:var(--red);animation:ask-spin .75s linear infinite}.ask-loader[hidden]{display:none}@keyframes ask-spin{to{transform:rotate(360deg)}}
.ask-field{display:flex;align-items:center;min-height:34px;font-family:var(--mono);font-size:clamp(16px,1.7vw,22px);color:var(--ink-soft);word-break:break-word}.ask-field[hidden]{display:none}.ask-caret{flex:none;width:2px;height:1.15em;margin-left:3px;background:var(--red)}
.ask-hidden-input{position:absolute;opacity:0;width:1px;height:1px;border:0;padding:0;pointer-events:none}.ask-hint{font-family:var(--mono);font-size:9px;letter-spacing:var(--track-wider);text-transform:uppercase;color:var(--ink-faint)}
.tt-body{padding:18px 16px 16px}.tt-stats{display:flex;margin:0 0 18px;border:1px solid var(--rule)}.tt-stat{flex:1;padding:12px 14px;border-right:1px solid var(--rule)}.tt-stat:last-child{border-right:0}.tt-stat dd{font-family:var(--mono);font-weight:600;font-size:26px;color:var(--ink);margin:0 0 2px}.tt-stat dt{font-family:var(--mono);font-size:9px;color:var(--ink-soft)}.tt-window{border:1px solid var(--rule);background:var(--bg-alt)}.tt-winbar{display:flex;align-items:center;gap:10px;padding:8px 12px;border-bottom:1px solid var(--rule)}.tt-code{font-family:var(--mono);font-size:14.5px;line-height:1.75;color:var(--ink-soft);max-height:260px;overflow:hidden;white-space:pre;user-select:none;outline:none;cursor:text;padding:12px 14px}.tt-result{text-align:center;padding:8px 0 4px}.tt-result-big{display:flex;align-items:baseline;justify-content:center;gap:8px}.tt-result-big span:first-child{font-family:var(--mono);font-weight:600;font-size:56px;color:var(--ink)}
.gh-block{border:1px solid var(--rule-strong);background:var(--panel);padding:20px}.gh-head{display:flex;justify-content:space-between;align-items:baseline;gap:14px;margin-bottom:18px}.gh-handle{font-family:var(--mono);font-size:11px;text-transform:uppercase;color:var(--ink-3);text-decoration:none}.gh-grid-wrap{overflow-x:auto;overflow-y:hidden;padding-bottom:4px}.gh-grid{display:block;width:100%;min-width:520px;height:auto}.gh-dot{fill:var(--ink)}.gh-dot--empty{fill:var(--rule-dot)}.gh-total{margin-top:16px;font-family:var(--mono);font-size:12px;color:var(--ink-soft)}.gh-total strong{color:var(--ink);font-weight:600}

@media (prefers-reduced-motion:no-preference){.reveal{opacity:0;transform:translateY(14px);transition:opacity var(--dur-slower) var(--ease-out),transform var(--dur-slower) var(--ease-out)}.reveal.is-visible{opacity:1;transform:none}}
@media (max-width:900px){.sidebar{position:sticky;top:0;inset:auto;width:100%;flex-direction:row;align-items:center;padding:10px 16px;border-right:0;border-bottom:1px solid var(--rule-strong);gap:12px}.sidebar-top{display:flex;align-items:center;justify-content:space-between;flex:1;gap:12px}.nav-burger{display:inline-flex}.site-nav{display:none;position:absolute;top:100%;left:0;right:0;margin-top:0;background:var(--bg);border-bottom:1px solid var(--rule-strong)}.site-nav.is-open{display:flex}.nav-label{display:none}.sidebar-bottom{flex-direction:row;align-items:center}.status-line,.sidebar-mail,.side-tools{display:none}.main{margin-left:0}.hero-inner,.section{padding-left:20px;padding-right:20px}.hero-grid{grid-template-columns:1fr;gap:32px}.hero-glyph{justify-self:start}.demo{grid-template-columns:1fr}.demo-chapters{border-left:0;border-top:1px solid var(--rule-strong);max-height:300px}.stack-grid{grid-template-columns:1fr}.xp{grid-template-columns:1fr;gap:8px}.xp-meta{flex-direction:row;align-items:center}.contact{padding-left:20px;padding-right:20px}#portraitCanvas{width:260px;height:260px}}