/* ═══════════════════════════════════════════════════════════════════
   About · "Signal" — the assistant is the page.

   The parts that only this page has. Tokens, layout primitives and the
   shared components live in signal.css, which must be loaded first.
   ═══════════════════════════════════════════════════════════════════ */


/* ═══════════════════════════════════════════════════════════════════
   Hero
   ═══════════════════════════════════════════════════════════════════ */
.sg-hero { position: relative; min-height: 100svh; display: grid; align-items: center; padding-block: clamp(6rem, 12vh, 9rem) 4.5rem; overflow: hidden; isolation: isolate; }
.sg-field { position: absolute; inset: 0; width: 100%; height: 100%; z-index: 0; opacity: .9; }
.sg-hero-grid { position: absolute; inset: 0; z-index: 0; pointer-events: none; background-image: linear-gradient(rgba(148, 163, 184, .06) 1px, transparent 1px), linear-gradient(90deg, rgba(148, 163, 184, .06) 1px, transparent 1px); background-size: 72px 72px; mask-image: radial-gradient(ellipse at 30% 40%, #000 20%, transparent 75%); }
.sg-hero-layout { position: relative; z-index: 1; display: grid; grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr); gap: 3rem; align-items: center; }
.sg-eyebrow { display: flex; flex-wrap: wrap; gap: .55rem .7rem; align-items: center; margin: 0 0 2rem; color: var(--muted); font: 600 .66rem/1 var(--mono); letter-spacing: .2em; }
.sg-eyebrow-sep { color: var(--dim); }
.sg-dot { width: .55rem; height: .55rem; border-radius: 50%; background: var(--green); box-shadow: 0 0 0 4px rgba(52, 211, 153, .18); animation: sg-blink 2.2s ease-in-out infinite; }
@keyframes sg-blink { 50% { box-shadow: 0 0 0 9px rgba(52, 211, 153, 0); } }
.sg-name { font-size: clamp(3.4rem, 7.6vw, 6.9rem); font-weight: 800; line-height: .92; letter-spacing: -.045em; margin-bottom: 1.6rem; overflow-wrap: anywhere; }
.sg-name .sg-word { display: inline-block; white-space: nowrap; margin-right: .22em; }
.sg-name .sg-letter { display: inline-block; opacity: 0; transform: translateY(.6em) rotate(6deg); animation: sg-letter .8s cubic-bezier(.2, .8, .2, 1) forwards; animation-delay: calc(var(--i) * 45ms); background: linear-gradient(180deg, #fff 30%, #a7f3d0 130%); -webkit-background-clip: text; background-clip: text; color: transparent; }
@keyframes sg-letter { to { opacity: 1; transform: none; } }
.sg-thesis { max-width: 34rem; font-family: var(--display); font-size: clamp(1.35rem, 2.3vw, 1.9rem); font-weight: 600; line-height: 1.25; letter-spacing: -.01em; color: var(--ink); margin: .4rem 0 1.4rem; text-wrap: balance; }
.sg-intro { max-width: 40rem; color: var(--muted); font-size: 1.06rem; line-height: 1.7; margin-bottom: 1.2rem; }
.sg-now { display: block; max-width: 42rem; color: var(--muted); line-height: 1.7; margin-bottom: 2.2rem; }
.sg-now span { display: inline-block; vertical-align: middle; margin-right: .6rem; padding: .3rem .6rem; border: 1px solid rgba(52, 211, 153, .4); border-radius: 999px; color: var(--green); font: 600 .62rem/1 var(--mono); letter-spacing: .2em; text-transform: uppercase; }
.sg-portrait { position: relative; margin: 0; justify-self: center; width: min(100%, 460px); aspect-ratio: 754 / 1100; }
.sg-portrait-halo { position: absolute; inset: 8% 6% 4%; border-radius: 48% 48% 40% 40%; background: radial-gradient(circle at 50% 40%, rgba(52, 211, 153, .32), rgba(103, 232, 249, .12) 45%, transparent 70%); filter: blur(22px); z-index: 0; }
.sg-portrait::before { content: ''; position: absolute; inset: 10% 12% 2%; border-radius: 50% 50% 42% 42% / 44% 44% 40% 40%; border: 1px solid rgba(52, 211, 153, .25); background: conic-gradient(from 0deg, rgba(52, 211, 153, .0), rgba(52, 211, 153, .35), rgba(103, 232, 249, .0) 60%); mask: radial-gradient(circle, transparent 66%, #000 67%); animation: sg-spin 24s linear infinite; z-index: 0; }
@keyframes sg-spin { to { transform: rotate(360deg); } }
.sg-portrait-img { position: relative; z-index: 1; display: block; width: 100%; height: auto; filter: drop-shadow(0 30px 60px rgba(0, 0, 0, .6)) saturate(.92); mask-image: linear-gradient(#000 82%, transparent 100%); }
.sg-chip { position: absolute; z-index: 2; display: grid; gap: .2rem; padding: .75rem .95rem; border-radius: .9rem; border: 1px solid var(--line-2); background: rgba(7, 12, 20, .82); backdrop-filter: blur(10px); margin: 0; animation: sg-float 6s ease-in-out infinite; }
.sg-chip b { font-family: var(--display); font-size: 1.5rem; font-weight: 800; line-height: 1; color: #fff; }
.sg-chip span { color: var(--muted); font: 600 .6rem/1 var(--mono); letter-spacing: .16em; text-transform: uppercase; }
.sg-chip-a { left: -6%; top: 26%; }
.sg-chip-b { right: -4%; top: 44%; animation-delay: -2s; }
.sg-chip-c { left: 4%; bottom: 10%; animation-delay: -4s; }
@keyframes sg-float { 50% { transform: translateY(-8px); } }
.sg-ledger { position: absolute; left: 0; right: 0; bottom: 0; z-index: 1; overflow: hidden; border-top: 1px solid var(--line); background: rgba(4, 7, 12, .7); backdrop-filter: blur(6px); }
.sg-ledger-track { display: flex; width: max-content; gap: 2.2rem; padding: .9rem 0; color: var(--dim); font: 600 .66rem/1 var(--mono); letter-spacing: .28em; text-transform: uppercase; animation: sg-ledger 40s linear infinite; }
.sg-ledger-track i { color: var(--green); font-style: normal; font-size: .5rem; }
@keyframes sg-ledger { to { transform: translateX(-50%); } }

/* ═══════════════════════════════════════════════════════════════════
   Assistant
   ═══════════════════════════════════════════════════════════════════ */
.sg-talk { background: linear-gradient(180deg, var(--bg), var(--bg-2)); border-top: 1px solid var(--line); }
.sg-talk-grid { display: grid; grid-template-columns: minmax(0, .8fr) minmax(0, 1.2fr); gap: 3rem; align-items: start; }
.sg-persona > p:not(.sg-label):not(.sg-fine) { margin-top: 1.2rem; color: var(--muted); font-size: 1.02rem; line-height: 1.7; max-width: 30rem; }
.sg-avatar { position: relative; width: 84px; height: 84px; display: grid; place-items: center; margin-bottom: 1.6rem; border-radius: 50%; background: radial-gradient(circle at 35% 30%, #123 0, #061018 70%); border: 1px solid rgba(52, 211, 153, .45); box-shadow: 0 0 40px rgba(52, 211, 153, .18); }
.sg-avatar span { font: 800 1.5rem/1 var(--display); color: var(--green); letter-spacing: -.03em; }
.sg-avatar i { position: absolute; inset: -10px; border-radius: 50%; border: 1px solid rgba(52, 211, 153, .35); animation: sg-ring 3s ease-out infinite; }
.sg-avatar i:nth-child(3) { animation-delay: 1.5s; }
@keyframes sg-ring { 0% { transform: scale(.85); opacity: .8; } 100% { transform: scale(1.35); opacity: 0; } }
.sg-voice { display: inline-flex; align-items: center; gap: .55rem; margin-top: 1.5rem; padding: .6rem .95rem; border-radius: 999px; border: 1px solid var(--line-2); background: transparent; color: var(--muted); font: 600 .7rem/1 var(--mono); letter-spacing: .14em; text-transform: uppercase; cursor: pointer; transition: color .2s, border-color .2s; }
.sg-voice[aria-pressed="true"] { color: var(--green); border-color: rgba(52, 211, 153, .5); }
.sg-voice[hidden] { display: none; }
.sg-fine { margin-top: .8rem; color: var(--dim); font-size: .78rem; line-height: 1.5; }
.sg-console { border: 1px solid var(--line-2); border-radius: var(--r); background: linear-gradient(160deg, rgba(14, 23, 34, .92), rgba(7, 12, 20, .96)); box-shadow: 0 30px 80px -30px rgba(0, 0, 0, .8), inset 0 1px 0 rgba(255, 255, 255, .04); overflow: hidden; }
.sg-console-bar { display: flex; justify-content: space-between; gap: 1rem; padding: .8rem 1.1rem; border-bottom: 1px solid var(--line); color: var(--dim); font: 600 .62rem/1 var(--mono); letter-spacing: .2em; }
.sg-live { display: inline-block; width: .5rem; height: .5rem; margin-right: .5rem; border-radius: 50%; background: var(--green); box-shadow: 0 0 10px var(--green); }
.sg-log { list-style: none; margin: 0; padding: 1.2rem 1.1rem 0; min-height: 300px; max-height: 480px; overflow-y: auto; display: grid; gap: .8rem; align-content: start; scrollbar-width: thin; scrollbar-color: var(--line-2) transparent; }
.sg-msg { display: grid; grid-template-columns: 2rem 1fr; gap: .7rem; max-width: 92%; align-items: start; }
.sg-msg-you { grid-template-columns: 1fr; justify-self: end; max-width: 80%; }
.sg-msg-av { width: 2rem; height: 2rem; border-radius: 50%; display: grid; place-items: center; border: 1px solid rgba(52, 211, 153, .4); color: var(--green); font: 800 .6rem/1 var(--display); }
.sg-bubble { padding: .85rem 1rem; border-radius: 1rem; border: 1px solid var(--line); background: rgba(255, 255, 255, .03); color: var(--ink); font-size: .95rem; line-height: 1.6; }
.sg-msg-you .sg-bubble { background: rgba(52, 211, 153, .12); border-color: rgba(52, 211, 153, .3); border-bottom-right-radius: .3rem; }
.sg-msg-7a .sg-bubble { border-top-left-radius: .3rem; }
.sg-bubble a { color: var(--green-2); text-decoration: underline; text-underline-offset: 3px; }
.sg-typing { display: inline-flex; gap: .3rem; padding: .3rem 0; }
.sg-typing i { width: .4rem; height: .4rem; border-radius: 50%; background: var(--green); animation: sg-typing 1s ease-in-out infinite; }
.sg-typing i:nth-child(2) { animation-delay: .15s; }
.sg-typing i:nth-child(3) { animation-delay: .3s; }
@keyframes sg-typing { 50% { transform: translateY(-4px); opacity: .5; } }
.sg-chips { display: flex; flex-wrap: wrap; gap: .5rem; padding: 1rem 1.1rem .4rem; }
.sg-chips button { padding: .55rem .9rem; border-radius: 999px; border: 1px solid var(--line-2); background: rgba(255, 255, 255, .02); color: var(--muted); font: 500 .8rem/1 var(--body); cursor: pointer; transition: color .2s, border-color .2s, transform .2s; }
.sg-chips button:hover { color: var(--ink); border-color: rgba(52, 211, 153, .5); transform: translateY(-1px); }
.sg-ask { display: flex; gap: .6rem; padding: .9rem 1.1rem 1.1rem; }
.sg-ask input { flex: 1; min-width: 0; padding: .9rem 1.1rem; border-radius: 999px; border: 1px solid var(--line-2); background: rgba(255, 255, 255, .03); color: var(--ink); font: 400 .95rem/1 var(--body); outline: none; transition: border-color .2s, box-shadow .2s; }
.sg-ask input:focus { border-color: var(--green); box-shadow: 0 0 0 4px rgba(52, 211, 153, .15); }
.sg-ask input::placeholder { color: var(--dim); }

/* ═══════════════════════════════════════════════════════════════════
   Systems
   ═══════════════════════════════════════════════════════════════════ */
.sg-systems { border-top: 1px solid var(--line); }
.sg-chapter { display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr); gap: clamp(2rem, 5vw, 5rem); padding-block: clamp(3rem, 6vw, 5rem); border-top: 1px solid var(--line); }
.sg-chapter:first-of-type { border-top: 0; }
.sg-chapter-frame { position: sticky; top: 6rem; align-self: start; display: grid; gap: 1rem; }
.sg-device { border-radius: 1rem; border: 1px solid rgba(var(--accent-rgb), .35); background: #060b12; box-shadow: 0 40px 90px -40px rgba(0, 0, 0, .9), 0 0 60px -30px rgba(var(--accent-rgb), .5); overflow: hidden; }
.sg-device-bar { display: flex; justify-content: space-between; gap: 1rem; padding: .7rem 1rem; border-bottom: 1px solid var(--line); color: var(--dim); font: 600 .6rem/1.4 var(--mono); letter-spacing: .18em; text-transform: uppercase; }
.sg-device-bar span:last-child { color: rgba(var(--accent-rgb), .95); text-align: right; letter-spacing: .06em; text-transform: none; }
.sg-device-screen { position: relative; aspect-ratio: 16 / 10; background: #0b1220; }
.sg-device-screen img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; object-position: top; opacity: 0; transform: scale(1.02); transition: opacity .6s ease, transform .9s ease; }
.sg-device-screen img.is-active { opacity: 1; transform: none; }
.sg-device-empty { position: absolute; inset: 0; display: grid; place-content: center; gap: .8rem; text-align: center; padding: 2rem; background: radial-gradient(circle at 50% 30%, rgba(var(--accent-rgb), .14), transparent 60%); }
.sg-device-empty img { max-width: 160px; max-height: 64px; object-fit: contain; margin-inline: auto; }
.sg-device-empty strong { font-family: var(--display); font-size: 1.6rem; }
.sg-device-empty p { color: var(--muted); max-width: 28rem; }
.sg-device-empty span { color: var(--dim); font: 600 .6rem/1 var(--mono); letter-spacing: .2em; text-transform: uppercase; }
.sg-facts { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: .8rem; margin: 0; padding: 1rem 1.1rem; border-radius: .9rem; border: 1px solid rgba(var(--accent-rgb), .22); background: rgba(var(--accent-rgb), .05); }
.sg-facts dt { color: rgba(var(--accent-rgb), .95); font: 600 .58rem/1 var(--mono); letter-spacing: .2em; text-transform: uppercase; margin-bottom: .35rem; }
.sg-facts dd { margin: 0; font-size: .84rem; line-height: 1.5; }
.sg-chapter-meta { display: flex; justify-content: space-between; gap: 1rem; color: var(--dim); font: 600 .62rem/1 var(--mono); letter-spacing: .2em; text-transform: uppercase; margin-bottom: 1.2rem; }
.sg-chapter-meta span:last-child { color: var(--green); }
.sg-chapter-story h3 { font-size: clamp(2rem, 4vw, 3.4rem); font-weight: 800; letter-spacing: -.035em; }
.sg-chapter-rel { margin: .6rem 0 2rem; color: rgba(var(--accent-rgb), .95); font: 600 .72rem/1 var(--mono); letter-spacing: .14em; text-transform: uppercase; }
.sg-step { position: relative; padding: 1.4rem 0 1.4rem 1.6rem; border-left: 1px solid var(--line); transition: border-color .3s; }
.sg-step::before { content: ''; position: absolute; left: -5px; top: 1.75rem; width: 9px; height: 9px; border-radius: 50%; background: var(--dim); transition: background .3s, box-shadow .3s; }
.sg-step.is-active { border-color: rgba(var(--accent-rgb), .7); }
.sg-step.is-active::before { background: var(--accent); box-shadow: 0 0 0 5px rgba(var(--accent-rgb), .18); }
.sg-step-label { display: flex; align-items: center; gap: .7rem; margin-bottom: .7rem; color: var(--muted); font: 600 .64rem/1 var(--mono); letter-spacing: .2em; text-transform: uppercase; }
.sg-step-label span { color: var(--accent); }
.sg-step p:not(.sg-step-label) { color: var(--muted); font-size: 1rem; line-height: 1.7; }
.sg-step-lede { color: var(--ink) !important; font-family: var(--display); font-size: 1.2rem !important; font-weight: 600; line-height: 1.4 !important; margin-bottom: .6rem; }
.sg-step-note { margin-top: .8rem; }
.sg-step-note b { color: var(--ink); font-weight: 600; }
.sg-step-decision { background: linear-gradient(90deg, rgba(var(--accent-rgb), .08), transparent 75%); border-radius: 0 .8rem .8rem 0; }
.sg-shipped { list-style: none; margin: 0 0 1rem; padding: 0; display: grid; gap: .6rem; }
.sg-shipped li { display: grid; grid-template-columns: 2rem 1fr; gap: .6rem; align-items: start; }
.sg-shipped span { color: var(--accent); font: 600 .66rem/1.8 var(--mono); }
.sg-shipped b { color: var(--ink); font-weight: 600; }
.sg-shipped p { font-size: .88rem !important; }
.sg-metrics { display: flex; flex-wrap: wrap; gap: 1.2rem 2rem; margin: 1rem 0; }
.sg-metrics dd { margin: 0; font-family: var(--display); font-size: 2rem; font-weight: 800; color: #fff; }
.sg-metrics dt { color: var(--muted); font-size: .8rem; }
.sg-links { display: flex; flex-wrap: wrap; gap: .6rem; margin-top: 1.2rem; }
.sg-links .sg-btn { padding: .7rem 1.1rem; font-size: .82rem; }

/* ═══════════════════════════════════════════════════════════════════
   Archive
   ═══════════════════════════════════════════════════════════════════ */
.sg-archive { background: var(--bg-2); border-top: 1px solid var(--line); }
.sg-archive-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 1rem; }
.sg-tile-count { --accent: var(--green); --accent-rgb: 52, 211, 153; justify-content: center; background: radial-gradient(circle at 20% 15%, rgba(52, 211, 153, .16), transparent 55%), linear-gradient(160deg, #0b1a17, var(--panel) 70%); border-color: rgba(52, 211, 153, .35); }
.sg-tile-count-inner { padding: 1.5rem 1.5rem 1.6rem; display: grid; gap: .4rem; }
.sg-count { display: flex; align-items: baseline; gap: .15rem; margin-top: 1rem; font-family: var(--display); font-weight: 800; line-height: .9; letter-spacing: -.05em; color: #fff; }
.sg-count b { font-size: clamp(4rem, 7vw, 6rem); font-weight: 800; }
.sg-count i { font-style: normal; font-size: clamp(2rem, 3.4vw, 3rem); color: var(--green); }
.sg-count-label { color: var(--green); font: 600 .66rem/1 var(--mono); letter-spacing: .24em; text-transform: uppercase; margin-bottom: .6rem; }
.sg-count-text { color: var(--muted); font-size: .92rem; line-height: 1.6; }
.sg-count-links { display: flex; flex-wrap: wrap; gap: 1.2rem; margin-top: 1rem; }
.sg-count-links a { color: var(--green-2); font-size: .85rem; text-decoration: none; }
.sg-count-links a:hover { text-decoration: underline; text-underline-offset: 3px; }

/* ═══════════════════════════════════════════════════════════════════
   Brand wall
   ═══════════════════════════════════════════════════════════════════ */
.sg-wall { border-top: 1px solid var(--line); padding-bottom: 0; }
.sg-wall-aside { display: grid; gap: .8rem; justify-items: start; color: var(--muted); max-width: 26rem; }
.sg-pause { display: inline-flex; align-items: center; gap: .5rem; padding: .5rem .8rem; border-radius: 999px; border: 1px solid var(--line-2); background: transparent; color: var(--muted); font: 600 .62rem/1 var(--mono); letter-spacing: .16em; text-transform: uppercase; cursor: pointer; }
.sg-timeline { list-style: none; margin: 3rem 0 0; padding: 0 0 4rem; display: grid; gap: 0; border-left: 1px solid var(--line); margin-left: .5rem; }
.sg-timeline li { position: relative; display: grid; grid-template-columns: 8rem 1fr; gap: 1.2rem; padding: 0 0 2rem 2rem; }
.sg-timeline li::before { content: ''; position: absolute; left: -.33rem; top: .4rem; width: .6rem; height: .6rem; border-radius: 50%; background: var(--green); box-shadow: 0 0 0 4px rgba(52, 211, 153, .16); }
.sg-timeline span { color: var(--green); font: 600 .7rem/1.6 var(--mono); letter-spacing: .16em; }
.sg-timeline h3 { font-size: 1.15rem; }
.sg-timeline p { margin-top: .3rem; color: var(--muted); line-height: 1.6; max-width: 46rem; }

/* ═══════════════════════════════════════════════════════════════════
   Field notes (light)
   ═══════════════════════════════════════════════════════════════════ */
.sg-notes-grid { display: grid; grid-template-columns: minmax(0, .9fr) minmax(0, 1.1fr); gap: clamp(2rem, 6vw, 6rem); }
.sg-notes-bio { margin-top: 1.4rem; max-width: 34rem; color: var(--muted); font-size: 1.05rem; line-height: 1.75; }
.sg-signature { display: grid; margin-top: 1.4rem; color: #8b6636; font-size: .9rem; }
.sg-signature small { color: var(--dim); font: 600 .6rem/1.8 var(--mono); letter-spacing: .18em; text-transform: uppercase; }
.sg-principles { list-style: none; margin: 0; padding: 0; border-top: 1px solid var(--line); }
.sg-principles li { display: grid; grid-template-columns: 3.5rem 1fr; gap: 1rem; padding: 1.5rem 0; border-bottom: 1px solid var(--line); }
.sg-principles span { color: #8b6636; font: 700 .72rem/1.9 var(--mono); }
.sg-principles h3 { font-size: 1.35rem; }
.sg-principles p { margin-top: .4rem; color: var(--muted); font-size: .95rem; line-height: 1.6; }
.sg-disciplines { margin-top: 2.2rem; display: grid; gap: .6rem; }
.sg-disciplines h3 { color: #8b6636; font: 700 .64rem/1 var(--mono); letter-spacing: .18em; text-transform: uppercase; margin-bottom: .4rem; }
.sg-disciplines div { display: grid; grid-template-columns: 10rem 1fr; gap: 1rem; font-size: .84rem; }
.sg-disciplines b { color: var(--ink); font-weight: 600; }
.sg-disciplines span { color: var(--muted); }

/* ═══════════════════════════════════════════════════════════════════
   Outro
   ═══════════════════════════════════════════════════════════════════ */
.sg-outro { border-top: 1px solid rgba(20, 60, 45, .2); background: radial-gradient(ellipse at 20% 0%, rgba(52, 211, 153, .12), transparent 55%), var(--bg); padding-block: clamp(4rem, 8vw, 7rem) 2rem; }
.sg-outro-grid { display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(0, .9fr); gap: 3rem; align-items: center; }
.sg-outro-grid > div:first-child p:last-child { margin-top: 1rem; color: var(--muted); font-size: 1.05rem; }
.sg-outro-links { display: grid; gap: 1.2rem; justify-items: start; }
.sg-email { font-family: var(--display); font-size: clamp(1.15rem, 2.1vw, 1.8rem); font-weight: 800; letter-spacing: -.02em; color: #fff; text-decoration: none; border-bottom: 2px solid var(--green); padding-bottom: .2rem; overflow-wrap: anywhere; }
.sg-email:hover { color: var(--green-2); }
.sg-socials { display: flex; flex-wrap: wrap; gap: .6rem 1.4rem; }
.sg-socials a { color: var(--muted); font-size: .92rem; text-decoration: none; border-bottom: 1px solid transparent; transition: color .2s, border-color .2s; }
.sg-socials a:hover { color: var(--ink); border-color: var(--line-2); }
.sg-outro-legal { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 1rem; margin-top: 4rem; padding-top: 1.4rem; border-top: 1px solid var(--line); color: var(--dim); font-size: .8rem; }
.sg-outro-legal nav { display: flex; gap: 1.2rem; }
.sg-outro-legal a { color: var(--dim); text-decoration: none; }
.sg-outro-legal a:hover { color: var(--ink); }

/* ═══════════════════════════════════════════════════════════════════
   Responsive
   ═══════════════════════════════════════════════════════════════════ */
@media (max-width: 1100px) {
  .sg-archive-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 900px) {
  .sg-hero { min-height: 0; padding-top: 6rem; }
  .sg-hero-layout { grid-template-columns: minmax(0, 1fr); }
  .sg-portrait { width: min(72vw, 360px); }
  .sg-chip-a { left: -4%; }
  .sg-talk-grid, .sg-notes-grid, .sg-outro-grid { grid-template-columns: minmax(0, 1fr); }
  .sg-chapter { grid-template-columns: minmax(0, 1fr); }
  .sg-chapter-frame { position: relative; top: auto; }
  .sg-facts { grid-template-columns: 1fr; }
  .sg-disciplines div { grid-template-columns: 1fr; gap: .2rem; }
  .sg-timeline li { grid-template-columns: 1fr; gap: .3rem; }
}
@media (max-width: 640px) {
  .sg-name { font-size: clamp(2.4rem, 12.5vw, 4.2rem); }
  .sg-name .sg-word { white-space: normal; }
  .sg-archive-grid { grid-template-columns: 1fr; }
  .sg-ask { flex-direction: column; }
  .sg-msg { max-width: 100%; }
  .sg-chip-b { right: 0; }
  .sg-chip-a { left: 0; }
}
@media (prefers-reduced-motion: reduce) {
  .sg-name .sg-letter { opacity: 1; transform: none; }
  .sg-ledger-track { animation: none !important; }
}

/* ═══════════════════════════════════════════════════════════════════
   Capabilities matrix
   ═══════════════════════════════════════════════════════════════════ */
.sg-caps { border-top: 1px solid var(--line); background: linear-gradient(180deg, var(--bg-2), var(--bg)); }
.sg-caps-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(min(100%, 22rem), 1fr)); gap: 1rem; }
.sg-cap { --accent: var(--green); --accent-rgb: 52, 211, 153; position: relative; display: flex; flex-direction: column; padding: 1.4rem 1.5rem 1.2rem; border: 1px solid var(--line); border-radius: var(--r); background: var(--panel); overflow: hidden; transition: border-color .25s, transform .25s; }
.sg-cap::after { content: ''; position: absolute; left: 0; right: 0; top: 0; height: 2px; background: linear-gradient(90deg, var(--accent), transparent 70%); opacity: .5; transition: opacity .25s; }
.sg-cap:hover { border-color: rgba(var(--accent-rgb), .45); transform: translateY(-3px); }
.sg-cap:hover::after { opacity: 1; }
.sg-cap[data-domain="gpu"] { --accent: #c4b5fd; --accent-rgb: 196, 181, 253; }
.sg-cap[data-domain="ai"] { --accent: #67e8f9; --accent-rgb: 103, 232, 249; }
.sg-cap[data-domain="ops"] { --accent: #fcd34d; --accent-rgb: 252, 211, 77; }
.sg-cap[data-domain="security"] { --accent: #fb7185; --accent-rgb: 251, 113, 133; }
.sg-cap[data-domain="infra"] { --accent: #6ee7b7; --accent-rgb: 110, 231, 183; }
.sg-cap > header { display: flex; align-items: baseline; gap: .7rem; margin-bottom: 1rem; }
.sg-cap-index { color: var(--accent); font: 700 .68rem/1 var(--mono); letter-spacing: .14em; }
.sg-cap h3 { flex: 1; font-size: 1.12rem; font-weight: 700; letter-spacing: -.01em; }
.sg-cap-count { color: var(--dim); font: 600 .62rem/1 var(--mono); padding: .25rem .45rem; border: 1px solid var(--line); border-radius: 999px; }
.sg-cap ul { list-style: none; margin: 0; padding: 0; display: grid; gap: .6rem; }
.sg-cap li { display: grid; gap: .1rem; padding-left: .9rem; position: relative; }
.sg-cap li::before { content: ''; position: absolute; left: 0; top: .5rem; width: .3rem; height: .3rem; border-radius: 50%; background: rgba(var(--accent-rgb), .8); }
.sg-cap li b { color: var(--ink); font-size: .9rem; font-weight: 600; }
.sg-cap li span { color: var(--muted); font-size: .8rem; line-height: 1.45; }
.sg-caps-foot { margin-top: 1.6rem; color: var(--dim); font: 500 .8rem/1.6 var(--mono); }
.sg-notes-link { margin-top: 2rem; }
.sg-notes-link a { color: #8b6636; font-size: .88rem; text-decoration: none; border-bottom: 1px solid rgba(139, 102, 54, .4); }
.sg-notes-link a:hover { border-color: #8b6636; }
@media (max-width: 640px) {
  .sg-caps-grid { grid-template-columns: minmax(0, 1fr); }
}