/* quana/style.css
   demo.quana.ai/quana — AI enablement platform.
   Concept: a system routing diagram. Cool technical paper, instrument teal,
   a wire down the left gutter with numbered nodes. Square corners, 1px --wire
   borders, no shadows anywhere on this site.
   This file is self-contained; it shares nothing with the other two sites. */

:root {
  --paper:  #EEF0EC;   /* cool grey-green page background */
  --panel:  #F7F8F6;   /* raised blocks */
  --ink:    #16201C;   /* deep green-black */
  --slate:  #5A6660;   /* secondary text */
  --wire:   #B9C2BB;   /* schematic lines, hairlines */
  --signal: #0E7C86;   /* instrument teal — live states, links, node fills */
  --alert:  #B5451B;   /* used once, on the HARD REFUSAL tag */

  --shell: 1120px;
  --pad: clamp(1.1rem, 4vw, 1.5rem);
  --gutter: 92px;       /* wire gutter on desktop */

  --font-display: 'Archivo', system-ui, sans-serif;
  --font-body: 'Public Sans', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, monospace;

  /* chat widget skin (BRIEF.md §5 — consumed by shared/chat-widget.css) */
  --chat-bg: #F7F8F6;
  --chat-fg: #16201C;
  --chat-accent: #16201C;
  --chat-accent-fg: #EEF0EC;
  --chat-bubble-user: #0E7C86;
  --chat-bubble-bot: #FFFFFF;
  --chat-radius: 0px;
  --chat-font: 'Public Sans', sans-serif;
  --chat-icon: url("data:image/svg+xml,%3Csvg%20xmlns='http://www.w3.org/2000/svg'%20viewBox='0%200%2024%2024'%3E%3Crect%20x='9'%20y='9'%20width='6'%20height='6'%20fill='black'/%3E%3Crect%20x='1'%20y='11'%20width='7'%20height='2'%20fill='black'/%3E%3Crect%20x='16'%20y='11'%20width='7'%20height='2'%20fill='black'/%3E%3C/svg%3E");
}

/* ---- base ------------------------------------------------------------- */

body {
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.6;
  color: var(--ink);
  background: var(--paper);
}

h1, h2, h3 {
  font-family: var(--font-display);
  letter-spacing: -0.03em;
  font-weight: 800;
}

a { color: var(--signal); }

p a { text-underline-offset: 0.2em; }

.mono {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--slate);
}

:focus-visible {
  outline: 2px solid var(--signal);
  outline-offset: 2px;
}

.shell {
  max-width: var(--shell);
  margin: 0 auto;
  padding-inline: var(--pad);
}

/* ---- buttons ---------------------------------------------------------- */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.95rem;
  text-decoration: none;
  border-radius: 0;
}

.btn--solid {
  background: var(--signal);
  color: #FFFFFF;
  padding: 0.7rem 1.15rem;
  border: 1px solid var(--signal);
  transition: background 140ms ease;
}
.btn--solid:hover { background: #0a5c64; }

.btn--link {
  color: var(--ink);
  padding: 0.7rem 0.2rem;
  border-bottom: 1px solid transparent;
  transition: border-color 140ms ease;
}
.btn--link:hover { border-color: var(--ink); }

.inline-ask {
  font-weight: 600;
  text-decoration: none;
  border-bottom: 1px solid color-mix(in srgb, var(--signal) 45%, transparent);
}
.inline-ask:hover { border-bottom-color: var(--signal); }

/* ---- masthead --------------------------------------------------------- */

.mast {
  position: sticky;
  top: 0;
  z-index: 50;
  background: var(--paper);   /* flat instrument surface — no frosted/glass blur */
  border-bottom: 1px solid transparent;
  transition: border-color 160ms ease;
}
.mast.is-stuck { border-bottom-color: var(--wire); }
.mast__inner {
  max-width: var(--shell);
  margin: 0 auto;
  padding: 0.75rem var(--pad);
  display: flex;
  align-items: center;
  gap: 1.4rem;
}
.mast__brand { display: flex; align-items: baseline; gap: 0.7rem; min-width: 0; }
.wordmark {
  font-family: var(--font-display);
  font-weight: 800;
  letter-spacing: -0.04em;
  font-size: 1.35rem;
  color: var(--ink);
  text-decoration: none;
  line-height: 1;
}
.mast__tag { white-space: nowrap; }
.mast__nav {
  margin-left: auto;
  display: flex;
  gap: 1.15rem;
}
.mast__nav a {
  color: var(--slate);
  text-decoration: none;
  transition: color 140ms ease;
}
.mast__nav a:hover { color: var(--ink); }
.mast .btn--solid { padding: 0.5rem 0.9rem; font-size: 0.85rem; }

/* ---- hero ------------------------------------------------------------- */

.hero {
  max-width: var(--shell);
  margin: 0 auto;
  padding: clamp(2.5rem, 6vw, 4.5rem) var(--pad) clamp(2rem, 5vw, 3.5rem);
  padding-left: calc(var(--pad) + var(--gutter));
  display: grid;
  grid-template-columns: 60% 40%;
  align-items: center;
  gap: clamp(1.5rem, 4vw, 3rem);
}
.eyebrow { color: var(--signal); margin-bottom: 1rem; }
.hero h1 {
  font-size: clamp(2.5rem, 6vw, 4.25rem);
  line-height: 1.02;
  margin-bottom: 1.1rem;
}
.hero__body {
  font-size: 1.19rem;
  max-width: 40ch;
  color: color-mix(in srgb, var(--ink) 92%, var(--paper));
}
.hero__cta {
  margin-top: 1.6rem;
  display: flex;
  align-items: center;
  gap: 1.1rem;
  flex-wrap: wrap;
}

.hero__schema { align-self: center; }
.schema {
  width: 100%;
  height: auto;
  border: 1px solid var(--wire);
  background: var(--paper);
  padding: 0.5rem;
}
.schema__cap { fill: var(--slate); font: 500 10px var(--font-mono); letter-spacing: 0.1em; }
.schema__box rect { fill: var(--panel); stroke: var(--wire); stroke-width: 1; }
.schema__txt text { fill: var(--ink); font: 500 11px var(--font-mono); letter-spacing: 0.05em; text-anchor: middle; }
.schema__wire line { stroke: var(--wire); stroke-width: 1; }
.schema__core { fill: var(--signal); stroke: var(--signal); }
.schema__core-txt text { fill: var(--paper); font: 500 11px var(--font-mono); letter-spacing: 0.06em; text-anchor: middle; }
.schema__note { margin-top: 0.5rem; text-align: right; }

/* ---- full-bleed band -------------------------------------------------- */

.band {
  position: relative;
  margin: 0 0 clamp(2rem, 5vw, 3.5rem);
}
.band img {
  width: 100%;
  aspect-ratio: 21 / 9;
  object-fit: cover;
  border-block: 1px solid var(--wire);
}
.band__cap {
  position: absolute;
  left: clamp(1rem, 4vw, 2.5rem);
  bottom: clamp(0.9rem, 2vw, 1.4rem);
  z-index: 2;
  background: var(--ink);
  color: var(--paper);
  padding: 0.35rem 0.6rem;
}

/* ---- photo grade (all q-photo images) -------------------------------- */

.q-photo { position: relative; margin: 0; }
.q-photo img {
  filter: grayscale(0.72) contrast(1.06) brightness(1.02);
  border: 1px solid var(--wire);
  width: 100%;
  display: block;
}
.q-photo::after {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--signal);
  mix-blend-mode: multiply;
  opacity: 0.10;
  pointer-events: none;
  z-index: 1;
}
.q-photo figcaption {
  position: relative;
  z-index: 2;
  background: var(--paper);
  color: var(--slate);
  padding-top: 0.55rem;
}
/* band overrides the caption base (it sits on the image, not below it).
   Re-asserts absolute here because `.q-photo figcaption` outranks the single
   `.band__cap` class and would otherwise pull it back into flow. */
.band .band__cap {
  position: absolute;
  right: auto;
  width: max-content;
  max-width: calc(100% - 2 * clamp(1rem, 4vw, 2.5rem));
  background: var(--ink);
  color: var(--paper);
  padding-top: 0.35rem;
}

/* ---- wired sections --------------------------------------------------- */

.wired {
  position: relative;
  max-width: var(--shell);
  margin: 0 auto;
  padding: 0 var(--pad) 0 calc(var(--pad) + var(--gutter));
}
.wire {
  position: absolute;
  top: 0;
  bottom: 0;
  left: calc(var(--pad) + (var(--gutter) / 2));
  width: 1px;
  background: var(--wire);
}

.sec { position: relative; padding-block: clamp(2.75rem, 6vw, 4.5rem); }
.sec + .sec { border-top: 1px solid var(--wire); }

.node {
  position: absolute;
  top: clamp(2.9rem, 6vw, 4.7rem);
  left: calc(-1 * (var(--gutter) / 2) - 5px);
  width: 10px;
  height: 10px;
  border: 1px solid var(--wire);
  background: var(--paper);
  transition: background 150ms ease, border-color 150ms ease;
}
.wired-sec.is-lit .node { background: var(--signal); border-color: var(--signal); }

.seclabel {
  position: relative;
  color: var(--slate);
  margin-bottom: 0.6rem;
}
.seclabel::before {
  content: '';
  position: absolute;
  top: 0.55em;
  left: calc(-1 * (var(--gutter) / 2) + 5px);
  width: calc((var(--gutter) / 2) - 5px);
  height: 1px;
  background: var(--wire);
}
.seclabel__num { color: var(--signal); }

.sec h2 {
  font-size: clamp(1.9rem, 4vw, 2.6rem);
  line-height: 1.05;
  margin-bottom: 0.8rem;
}
.sec__sub {
  max-width: 62ch;
  color: var(--slate);
  margin-bottom: 2rem;
}
.sec__aside { margin-top: 1.6rem; }

/* ---- [01] the layer — 2x2 blocks ------------------------------------- */

.grid2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  border: 1px solid var(--wire);
  margin-top: 1.6rem;
}
.block {
  padding: clamp(1.3rem, 3vw, 1.9rem);
  border: 1px solid var(--wire);
  margin: -0.5px;  /* collapse doubled interior hairlines */
  background: var(--panel);
}
.block__key {
  font-size: 0.74rem;
  color: var(--ink);
  margin-bottom: 0.7rem;
}
.block p { color: color-mix(in srgb, var(--ink) 90%, var(--paper)); }
.block .inline-ask { display: inline-block; margin-top: 0.3rem; }

/* ---- [02] live on this page — demo blocks ---------------------------- */

.demos {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: clamp(1rem, 2.5vw, 1.6rem);
}
.demo { display: flex; flex-direction: column; }
.demo__shot { margin: 0 0 0.8rem; }
.demo__shot img {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  border: 1px solid var(--wire);
  background: var(--panel);
}
.demo__label { color: var(--ink); margin-bottom: 0.4rem; }
.demo__what { font-size: 0.98rem; color: var(--slate); margin-bottom: 0.8rem; }
.tr {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  line-height: 1.55;
  white-space: pre-wrap;
  color: var(--ink);
  background: var(--panel);
  border: 1px solid var(--wire);
  border-left: 2px solid var(--signal);
  padding: 0.8rem 0.9rem;
  margin: 0 0 0.9rem;
  min-height: 8.4em;
  overflow-wrap: anywhere;
}
.tr::first-line { color: var(--signal); }
.demo--weight .tr {
  border-left-width: 3px;
  background: color-mix(in srgb, var(--signal) 6%, var(--panel));
}
.demo__open {
  margin-top: auto;
  font-weight: 600;
  text-decoration: none;
  border-bottom: 1px solid color-mix(in srgb, var(--signal) 45%, transparent);
  align-self: flex-start;
}
.demo__open:hover { border-bottom-color: var(--signal); }

/* ---- [03] connects to — pin rails ------------------------------------ */

.rails {
  display: grid;
  grid-template-columns: 1.5fr 1fr;
  gap: clamp(1.5rem, 4vw, 3rem);
  margin-top: 0.5rem;
}
.rail__tag {
  color: var(--ink);
  font-size: 0.8rem;
  margin-bottom: 0.9rem;
}
.rail__list {
  position: relative;
  margin: 0 0 0 8px;   /* room so the pin dots never poke past the viewport edge */
  padding-left: 18px;
  border-left: 1px solid var(--wire);
}
.pin {
  position: relative;
  display: flex;
  align-items: baseline;
  gap: 0.6rem;
  padding: 0.5rem 0;
}
.pin__dot {
  position: absolute;
  left: -22px;
  top: 0.75rem;
  width: 9px;
  height: 9px;
  background: var(--signal);
  border: 1px solid var(--signal);
}
.pin__name {
  color: var(--ink);
  font-size: 0.76rem;
  flex: 0 0 auto;
  min-width: 8.5rem;
}
.pin__lead {
  flex: 1 1 auto;
  align-self: center;
  border-top: 1px dashed var(--wire);
  min-width: 1rem;
}
.pin__desc {
  color: var(--slate);
  font-size: 0.72rem;
  flex: 0 1 auto;
  text-align: right;
}
.rail__foot {
  margin-top: 1.6rem;
  color: var(--slate);
  text-transform: none;
  letter-spacing: 0.02em;
  font-size: 0.8rem;
}
.rail__foot .inline-ask { color: var(--signal); }

/* ---- [04] guardrails -------------------------------------------------- */

.guard {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: clamp(1.5rem, 4vw, 3rem);
  align-items: start;
}
.guard__rows { margin: 0; border-top: 1px solid var(--wire); }
.guard__row {
  padding: 1.15rem 0;
  border-bottom: 1px solid var(--wire);
  display: grid;
  grid-template-columns: 12rem 1fr;
  gap: 1.2rem;
}
.guard__row dt {
  color: var(--ink);
  font-size: 0.76rem;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  align-content: start;
}
.guard__row dd { margin: 0; color: color-mix(in srgb, var(--ink) 90%, var(--paper)); }
.tag-alert {
  color: var(--paper);
  background: var(--alert);
  padding: 0.15rem 0.4rem;
  font-size: 0.62rem;
}
.guard__photo img { aspect-ratio: 1 / 1.4; object-fit: cover; }

/* ---- [05] built on it ------------------------------------------------- */

.products {
  display: grid;
  grid-template-columns: 40fr 35fr 25fr;
  border: 1px solid var(--wire);
  margin-top: 1.5rem;
}
.product {
  padding: clamp(1.3rem, 3vw, 1.8rem);
  border-right: 1px solid var(--wire);
  background: var(--panel);
}
.product:last-child { border-right: 0; }
.product__name {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.35rem;
  letter-spacing: -0.02em;
  margin-bottom: 0.5rem;
}
.product p { font-size: 0.95rem; color: color-mix(in srgb, var(--ink) 90%, var(--paper)); }
.product__meta { margin-top: 0.9rem; color: var(--signal); }

.pair {
  display: grid;
  grid-template-columns: 64fr 36fr;
  gap: clamp(0.8rem, 2vw, 1.4rem);
  margin-top: clamp(1.4rem, 3vw, 2.2rem);
  align-items: end;
}
.pair__wide img { aspect-ratio: 3 / 2; object-fit: cover; }
.pair__narrow img { aspect-ratio: 3 / 4; object-fit: cover; }

/* ---- [06] talk to us -------------------------------------------------- */

.contact {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: clamp(1.8rem, 5vw, 3.5rem);
  margin-top: 0.5rem;
}
.form { display: grid; gap: 1.1rem; align-content: start; }
.field { display: grid; gap: 0.4rem; }
.field label { font-size: 0.9rem; font-weight: 600; color: var(--ink); }
.field input,
.field textarea {
  font-family: var(--font-body);
  font-size: 1rem;
  padding: 0.65rem 0.75rem;
  border: 1px solid var(--wire);
  border-radius: 0;
  background: var(--panel);
  color: var(--ink);
  width: 100%;
}
.field textarea { resize: vertical; min-height: 6rem; }
.field input:focus-visible,
.field textarea:focus-visible {
  outline: 2px solid var(--signal);
  outline-offset: 1px;
  border-color: var(--signal);
}
.form .btn--solid { justify-self: start; margin-top: 0.3rem; }

.contact__addr {
  font-style: normal;
  line-height: 1.7;
  border-left: 2px solid var(--signal);
  padding-left: 1rem;
  margin-bottom: 1.2rem;
}
.contact__addr strong { font-weight: 600; }
.contact__addr a { text-underline-offset: 0.2em; }
.contact__spec { color: var(--slate); margin-bottom: 0.4rem; }
.contact__photo { margin-top: 1.4rem; }
.contact__photo img { aspect-ratio: 6 / 7; object-fit: cover; }

/* ---- footer ----------------------------------------------------------- */

.foot {
  border-top: 1px solid var(--wire);
  margin-top: clamp(2rem, 5vw, 3.5rem);
}
.foot__inner {
  max-width: var(--shell);
  margin: 0 auto;
  padding: 1.4rem var(--pad);
  display: flex;
  align-items: center;
  gap: 1rem;
}
.foot__node {
  width: 10px;
  height: 10px;
  background: var(--signal);
  border: 1px solid var(--signal);
  flex: 0 0 auto;
}
.foot .wordmark { font-size: 1.1rem; }
.foot__line { margin-left: auto; color: var(--slate); text-align: right; }

/* ---- responsive ------------------------------------------------------- */

@media (max-width: 900px) {
  :root { --gutter: 0px; }

  .wire, .node, .seclabel::before { display: none; }

  .hero {
    grid-template-columns: 1fr;
    padding-left: var(--pad);
  }
  .hero__body { max-width: none; }

  .mast__tag { display: none; }
  .mast__nav { gap: 0.9rem; }

  .grid2 { grid-template-columns: 1fr; }
  .demos { grid-template-columns: 1fr; }
  .demo--weight { order: -1; }   /* lead with the Hindi refusal excerpt */
  .rails { grid-template-columns: 1fr; }
  .guard { grid-template-columns: 1fr; }
  .guard__photo { max-width: 300px; }
  .products { grid-template-columns: 1fr; }
  .product { border-right: 0; border-bottom: 1px solid var(--wire); }
  .product:last-child { border-bottom: 0; }
  .pair { grid-template-columns: 1fr; }
  .contact { grid-template-columns: 1fr; }
}

@media (max-width: 680px) {
  .mast__inner { flex-wrap: wrap; gap: 0.6rem 1rem; }
  .mast__nav { order: 3; width: 100%; margin-left: 0; flex-wrap: wrap; }
  .mast .btn--solid { margin-left: auto; }

  .guard__row { grid-template-columns: 1fr; gap: 0.4rem; }
  .pin { flex-wrap: wrap; }
  .pin__lead { display: none; }
  .pin__desc { text-align: left; width: 100%; }
  .pin__name { min-width: 0; }
  .foot__inner { flex-wrap: wrap; }
  .foot__line { margin-left: 0; text-align: left; width: 100%; }
}

/* stagger figure width/height attrs won't cause CLS — object-fit + ratio set */