/* ============================================================
   KerrQ — Professional White Theme Design System
   Palette: #ffffff base · #f6f8fb alt · #0f172a text · #1a56db accent
   ============================================================ */

:root {
  --bg: #ffffff;
  --bg-2: #f6f8fb;
  --panel: #ffffff;
  --line: #e4e9f0;
  --text: #0f172a;
  --text-dim: #5b6478;
  --accent: #1a56db;
  --accent-soft: #0ea5e9;
  --font-display: "Space Grotesk", sans-serif;
  --font-body: "Inter", sans-serif;
  --radius: 18px;
  --maxw: 1180px;
  --shadow-soft: 0 10px 30px -12px rgba(15, 23, 42, 0.12);
  --shadow-hover: 0 20px 45px -18px rgba(15, 23, 42, 0.22);
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

::selection { background: rgba(26, 86, 219, 0.14); color: var(--text); }

/* ---------- Ambient background layers ---------- */
#bg-grid {
  position: fixed;
  inset: 0;
  width: 100vw;
  height: 100vh;
  z-index: -2;
  opacity: 0.6;
}

.scanlines {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background: repeating-linear-gradient(
    to bottom,
    transparent 0px,
    transparent 3px,
    rgba(15, 23, 42, 0.018) 3px,
    rgba(15, 23, 42, 0.018) 4px
  );
  mix-blend-mode: multiply;
}

/* ---------- Typography ---------- */
.overline {
  font-family: var(--font-display);
  font-size: 0.78rem;
  letter-spacing: 0.34em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1.1rem;
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
}
.overline::before {
  content: "";
  width: 34px;
  height: 1px;
  background: linear-gradient(90deg, var(--accent), transparent);
}

.section-title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(2rem, 4.5vw, 3.4rem);
  line-height: 1.08;
  letter-spacing: -0.02em;
  color: var(--text);
  margin-bottom: 1.4rem;
}

.section-lead {
  color: var(--text-dim);
  font-size: 1.08rem;
  max-width: 640px;
  margin-bottom: 3rem;
}

.section-sub {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: clamp(1.25rem, 2.3vw, 1.55rem);
  line-height: 1.65;
  color: var(--text-dim);
  max-width: 820px;
  margin-bottom: 2rem;
  margin-top: -0.5rem;
}

.build-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  max-width: 1120px;
  margin: 0 auto;
}
.build-card {
  border: 1px solid var(--line);
  border-radius: 20px;
  padding: 2.5rem 2.2rem;
  background: #ffffff;
  box-shadow: 0 10px 40px rgba(15, 23, 42, 0.05);
  text-align: left;
}
.card-title {
  font-size: clamp(1.5rem, 2.5vw, 1.9rem);
  line-height: 1.25;
  letter-spacing: -0.01em;
  margin: 0 0 1rem;
}
.card-body {
  font-size: 1.05rem;
  line-height: 1.75;
  color: var(--text-dim);
  margin: 0;
}
.build-grid--3 {
  grid-template-columns: repeat(3, 1fr);
  max-width: 1080px;
  align-items: start;
}
.build-grid--3 .card-list {
  grid-template-columns: 1fr;
}

/* ---------- Timeline (about cards) ---------- */
.timeline {
  position: relative;
  max-width: 1240px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 2.5rem;
}
.timeline::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: 50%;
  width: 2px;
  transform: translateX(-50%);
  background: linear-gradient(180deg, var(--accent), var(--accent-soft));
  opacity: 0.5;
}
.timeline-item {
  position: relative;
  width: 50%;
}
.timeline-item.right {
  align-self: flex-end;
  padding-left: 3rem;
}
.timeline-item.left {
  align-self: flex-start;
  padding-right: 3rem;
  text-align: left;
}
.timeline-num {
  position: absolute;
  top: 50%;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-weight: 600;
  color: #ffffff;
  background: linear-gradient(135deg, var(--accent), var(--accent-soft));
  box-shadow: 0 6px 18px rgba(26, 86, 219, 0.35);
  z-index: 2;
}
.timeline-item.right .timeline-num {
  left: 0;
  transform: translate(-50%, -50%);
}
.timeline-item.left .timeline-num {
  right: 0;
  transform: translate(50%, -50%);
}
.timeline-card {
  border: 1px solid var(--line);
  border-radius: 20px;
  padding: 1.6rem 1.9rem;
  background: #ffffff;
  box-shadow: 0 10px 40px rgba(15, 23, 42, 0.05);
  text-align: left;
  transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
}
.timeline-card:hover {
  transform: translateY(-6px);
  border-color: var(--accent);
  box-shadow: 0 0 0 2px rgba(26, 86, 219, 0.5), 0 18px 44px rgba(26, 86, 219, 0.18);
}
.timeline-card .card-title {
  font-size: clamp(1.3rem, 2vw, 1.6rem);
  margin-bottom: 0.75rem;
}
.timeline-card .card-body {
  font-size: 0.95rem;
  line-height: 1.6;
}
.timeline-card .card-list {
  margin-top: 1rem;
  gap: 0.6rem 1.5rem;
}
.timeline-card .card-list li {
  font-size: 0.92rem;
}
.card-list {
  list-style: none;
  margin: 1.5rem 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.9rem 2rem;
}
.card-list li {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 1.02rem;
  line-height: 1.4;
  color: var(--text);
}

.key-line {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(1.4rem, 2.8vw, 2.2rem);
  line-height: 1.5;
  max-width: 900px;
  margin: 3rem auto 0;
}

/* ---------- Logo Track (scrolling) ---------- */
.logo-track {
  width: 100%;
  overflow: hidden;
  padding: 2rem 0;
}
.logo-track-inner {
  display: flex;
  gap: 3rem;
  width: max-content;
  animation: scroll-track 30s linear infinite;
}
.logo-slot {
  flex-shrink: 0;
  width: 180px;
  height: 70px;
  display: grid;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: #ffffff;
  color: var(--text-dim);
  font-family: var(--font-display);
  font-size: 0.85rem;
  letter-spacing: 0.06em;
  user-select: none;
}
@keyframes scroll-track {
  0% { transform: translateX(0); }
  100% { transform: translateX(-50%); }
}

/* ---------- Page glows ---------- */
.page-glow {
  position: absolute;
  width: 500px;
  height: 500px;
  border-radius: 50%;
  filter: blur(140px);
  pointer-events: none;
  z-index: 0;
  opacity: 0.12;
}
.glow-1 { top: 8%; right: -5%; background: var(--accent); opacity: 0.22; }
.glow-2 { top: 45%; left: -8%; background: var(--accent-soft); opacity: 0.18; }
.glow-3 { bottom: 10%; right: 10%; background: var(--accent); opacity: 0.14; }

.qubit-field--page {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: min(60vw, 700px);
  height: auto;
  aspect-ratio: 1 / 1;
  margin: 0;
  opacity: 0.14;
  z-index: 0;
}

.quantum-pills {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.9rem;
  margin-top: 2rem;
}
.qp {
  font-family: var(--font-display);
  font-size: 0.82rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  color: var(--accent);
  border: 1px solid rgba(26, 86, 219, 0.25);
  background: rgba(26, 86, 219, 0.04);
  border-radius: 999px;
  padding: 0.5rem 1.1rem;
  white-space: nowrap;
}

.section--about {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 6rem 1.5rem;
}

.about-title {
  font-size: clamp(3rem, 10vw, 7rem);
  line-height: 1.1;
  margin: 0;
  letter-spacing: -0.02em;
  color: var(--text);
}

.about-sub {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: clamp(1.1rem, 2vw, 1.4rem);
  line-height: 1.6;
  color: var(--text-dim);
  margin: 1.5rem auto 0;
  max-width: 820px;
  text-align: center;
}

.grad-text {
  background: linear-gradient(90deg, var(--accent), var(--accent-soft));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.accent { color: var(--accent); }

/* ---------- Layout ---------- */
.section { padding: 9rem 1.5rem; position: relative; }
.section--alt { background: linear-gradient(180deg, transparent, var(--bg-2), transparent); }
.section--home { padding: 2rem 1.5rem 6rem; }
.section--technology { text-align: center; padding-top: 6rem; }
.section--technology .section-inner { display: flex; flex-direction: column; align-items: center; }
.section--technology .section-lead { margin-left: auto; margin-right: auto; }

#building { padding-top: 0; }
#who-we-are { padding-bottom: 0; }
#who-we-are .section-sub { font-size: clamp(1.05rem, 2vw, 1.3rem); }
#who-we-are { padding-top: 3.5rem; }

.tech-key {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(1.15rem, 2.2vw, 1.45rem);
  line-height: 1.7;
  color: var(--accent);
  max-width: 820px;
  margin: 0 auto 2.5rem;
}

.scalability-sub {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: clamp(1.1rem, 2vw, 1.35rem);
  line-height: 1.7;
  color: var(--text-dim);
  max-width: 820px;
  margin-top: 1rem;
}

.tech-grid {
  width: 100%;
  max-width: 1080px;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.6rem;
  text-align: left;
}
.tech-card {
  background: linear-gradient(160deg, #ffffff, #fbfcfe);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 2.2rem;
  box-shadow: var(--shadow-soft);
  transition: transform 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}
.tech-card:hover {
  transform: translateY(-4px);
  border-color: rgba(26, 86, 219, 0.35);
  box-shadow: var(--shadow-hover);
}
.tech-card h3 {
  font-family: var(--font-display);
  font-size: 1.35rem;
  color: var(--text);
  margin-bottom: 0.9rem;
}
.tech-card > p {
  color: var(--text-dim);
  font-size: 1rem;
  margin-bottom: 1.4rem;
}
.card-list {
  list-style: none;
  display: grid;
  gap: 0.7rem;
}
.card-list li {
  position: relative;
  padding-left: 1.6rem;
  color: var(--text-dim);
  font-size: 0.98rem;
}
.card-list li::before {
  content: "▸";
  position: absolute;
  left: 0;
  color: var(--accent);
  font-weight: 700;
}

.tech-block {
  width: 100%;
  max-width: 820px;
  text-align: left;
  padding: 2.4rem 0 1.2rem;
  margin-right: auto;
}
.tech-block + .tech-block { padding-top: 1rem; }

.tech-bottom {
  position: relative;
  width: 100%;
  max-width: 1080px;
  padding-right: 390px;
}
.tech-visual {
  position: absolute;
  top: 1rem;
  right: 0;
  width: 360px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
  padding: 1rem 0;
}
.bs-svg { width: 100%; height: auto; }
.bs-sphere {
  fill: rgba(26, 86, 219, 0.04);
  stroke: rgba(26, 86, 219, 0.4);
  stroke-width: 1.5;
}
.bs-ring {
  fill: none;
  stroke: rgba(26, 86, 219, 0.25);
  stroke-width: 1;
}
.bs-axis {
  stroke: rgba(26, 86, 219, 0.3);
  stroke-width: 1;
  stroke-dasharray: 3 5;
}
.bs-state {
  fill: var(--accent);
  filter: drop-shadow(0 0 8px rgba(26, 86, 219, 0.9));
}
.bs-label {
  font-family: var(--font-display);
  font-size: 16px;
  fill: var(--accent);
}
.pv-caption {
  font-family: var(--font-display);
  font-size: 0.72rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--text-dim);
}
.tech-block h3 {
  font-family: var(--font-display);
  font-size: 1.25rem;
  color: var(--text);
  margin-bottom: 0.6rem;
}
.tech-block > p {
  color: var(--text-dim);
  font-size: 1rem;
  margin-bottom: 1.1rem;
}
.tech-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
}
.tech-tags span {
  font-family: var(--font-display);
  font-size: 0.86rem;
  color: var(--accent);
  border: 1px solid rgba(26, 86, 219, 0.3);
  background: rgba(26, 86, 219, 0.04);
  border-radius: 999px;
  padding: 0.4rem 1rem;
}

.wf {
  max-width: 860px;
  font-family: var(--font-display);
  font-size: 1rem;
  line-height: 1.8;
  color: var(--text);
  font-weight: 700;
}
.wf-op {
  color: var(--accent);
  font-weight: 700;
  margin: 0 0.3rem;
}
.wf-result {
  font-weight: 700;
}
.section-inner { max-width: var(--maxw); margin: 0 auto; }

/* ---------- Nav ---------- */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  transition: background 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
  border-bottom: 1px solid transparent;
  background: transparent;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}
.nav.scrolled {
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom-color: var(--line);
  box-shadow: 0 8px 30px -18px rgba(15, 23, 42, 0.18);
}
.nav-inner {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 1.1rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  text-decoration: none;
  color: var(--text);
}
.logo-mark {
  width: 38px; height: 38px;
  display: grid;
  place-items: center;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.25rem;
  color: #fff;
  background: linear-gradient(135deg, var(--accent), var(--accent-soft));
  border-radius: 10px;
}
.logo-text {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.3rem;
  letter-spacing: 0.02em;
}

.nav-links {
  display: flex;
  gap: 2.2rem;
}
.nav-links a {
  color: var(--text-dim);
  text-decoration: none;
  font-size: 0.92rem;
  font-weight: 500;
  transition: color 0.2s ease;
}
.nav-links a:hover { color: var(--accent); }

.nav-cta {
  color: #fff;
  text-decoration: none;
  font-size: 0.88rem;
  font-weight: 600;
  padding: 0.55rem 1.3rem;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--accent), var(--accent-soft));
  transition: box-shadow 0.25s ease, transform 0.25s ease;
}
.nav-cta:hover { box-shadow: var(--shadow-hover); transform: translateY(-1px); }

.menu-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  flex-direction: column;
  gap: 5px;
  padding: 6px;
}
.menu-toggle span {
  width: 24px; height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: transform 0.3s ease, opacity 0.3s ease;
}
.mobile-menu {
  display: none;
  flex-direction: column;
  gap: 1.2rem;
  padding: 1.2rem 1.5rem 1.8rem;
  background: rgba(255, 255, 255, 0.97);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line);
}
.mobile-menu a { color: var(--text); text-decoration: none; font-size: 1.1rem; }
.mobile-menu .mobile-cta {
  color: #fff;
  font-weight: 700;
  text-align: center;
  padding: 0.7rem;
  border-radius: 10px;
  background: linear-gradient(90deg, var(--accent), var(--accent-soft));
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-block;
  text-decoration: none;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.98rem;
  padding: 0.95rem 2.1rem;
  border-radius: 12px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: box-shadow 0.25s ease, transform 0.25s ease, border-color 0.25s ease, background 0.25s ease;
}
.btn-primary {
  color: #fff;
  background: linear-gradient(90deg, var(--accent), var(--accent-soft));
}
.btn-primary:hover { box-shadow: var(--shadow-hover); transform: translateY(-2px); }
.btn-ghost {
  color: var(--accent);
  border-color: rgba(26, 86, 219, 0.35);
  background: rgba(26, 86, 219, 0.05);
}
.btn-ghost:hover { border-color: var(--accent); box-shadow: var(--shadow-soft); transform: translateY(-2px); }

/* ---------- Hero ---------- */
.hero {
  min-height: 100vh;
  display: flex;
  flex-direction: row-reverse;
  align-items: center;
  justify-content: flex-start;
  gap: 3.5rem;
  position: relative;
  padding: 8rem clamp(1.5rem, 6vw, 6rem) 5rem;
  overflow: hidden;
}

.hero-glow {
  position: absolute;
  width: 520px; height: 520px;
  border-radius: 50%;
  filter: blur(120px);
  opacity: 0.14;
  pointer-events: none;
}
.hero-glow--cyan { top: -10%; right: -8%; background: #1a56db; }
.hero-glow--mint { bottom: -20%; left: -10%; background: #0ea5e9; opacity: 0.08; }

/* ---------- Quantum qubit field ---------- */
.qubit-field {
  position: relative;
  flex: 0 0 auto;
  width: 430px;
  height: 430px;
  margin-left: 2rem;
  pointer-events: none;
  z-index: 0;
  opacity: 0.95;
}
.qubit-field::before {
  content: "";
  position: absolute;
  inset: -40px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(26, 86, 219, 0.12), transparent 70%);
  filter: blur(30px);
}
.qubit-core {
  position: absolute;
  inset: 40%;
  border-radius: 50%;
  background: radial-gradient(circle at 32% 32%, #ffffff, var(--accent) 55%, #123f9e 100%);
  box-shadow: 0 0 34px rgba(26, 86, 219, 0.45), inset 0 0 14px rgba(255, 255, 255, 0.5);
  animation: qubit-pulse 4s ease-in-out infinite;
  z-index: 2;
}
@keyframes qubit-pulse {
  0%, 100% { box-shadow: 0 0 22px rgba(26, 86, 219, 0.35), inset 0 0 14px rgba(255, 255, 255, 0.5); }
  50% { box-shadow: 0 0 54px rgba(26, 86, 219, 0.6), inset 0 0 14px rgba(255, 255, 255, 0.5); }
}
.qubit-svg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  overflow: visible;
  z-index: 1;
}
.qubit-ring-svg {
  stroke: rgba(26, 86, 219, 0.3);
  stroke-width: 1;
}
.qubit-dot {
  fill: var(--accent-soft);
  filter: drop-shadow(0 0 6px rgba(14, 165, 233, 0.85));
}

.psi {
  font-family: var(--font-display);
  font-weight: 500;
  color: var(--accent-soft);
  margin-right: 0.55rem;
  font-size: 1.05em;
}

.hero-orbit {
  position: absolute;
  right: -160px;
  top: 18%;
  width: 560px; height: 560px;
  border-radius: 50%;
  border: 1px solid rgba(26, 86, 219, 0.18);
  animation: spin 30s linear infinite;
  pointer-events: none;
}
.hero-orbit::before {
  content: "";
  position: absolute;
  top: -6px; left: 50%;
  width: 12px; height: 12px;
  border-radius: 50%;
  background: var(--accent);
}

@keyframes spin { to { transform: rotate(360deg); } }

.hero-inner { max-width: 660px; margin: 0; position: relative; }

.hero-title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(2.4rem, 6vw, 4.4rem);
  line-height: 0.98;
  letter-spacing: -0.03em;
  color: var(--text);
  margin-bottom: 1.6rem;
}

.hero-sub {
  color: var(--text-dim);
  font-size: clamp(1.02rem, 1.6vw, 1.25rem);
  max-width: 620px;
  margin-bottom: 2.4rem;
}

.hero-actions { display: flex; gap: 1rem; flex-wrap: wrap; margin-bottom: 4.5rem; }

.hero-stats {
  display: flex;
  gap: 3.5rem;
  flex-wrap: wrap;
  padding-top: 2.5rem;
  border-top: 1px solid var(--line);
}
.stat { display: flex; flex-direction: column; gap: 0.25rem; }
.stat-num {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 2.4rem;
  color: var(--accent);
}
.stat-label { color: var(--text-dim); font-size: 0.86rem; }

.scroll-hint {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.7rem;
  text-decoration: none;
  color: var(--text-dim);
}
.scroll-text { font-family: var(--font-display); font-size: 0.7rem; letter-spacing: 0.4em; }
.scroll-line {
  width: 1px; height: 52px;
  background: linear-gradient(180deg, var(--accent), transparent);
  animation: pulse-line 2s ease-in-out infinite;
}
@keyframes pulse-line {
  0%, 100% { transform: scaleY(0.6); transform-origin: top; opacity: 0.5; }
  50% { transform: scaleY(1); opacity: 1; }
}

/* ---------- Split (Problem) ---------- */
.split {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 3rem;
  align-items: start;
}
.split-text p { color: var(--text-dim); font-size: 1.06rem; margin-bottom: 1.2rem; }
.split-cards { display: grid; gap: 1.2rem; }

/* Problem section — fits one viewport, no scrolling */
.section--problem {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: 7rem 1.5rem 6rem;
}
.section--problem .section-inner { width: 100%; }
.problem-head {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 3rem;
  align-items: end;
  margin-bottom: 2.6rem;
}
.section--problem .section-title { margin-bottom: 0; font-size: clamp(1.9rem, 3.6vw, 2.9rem); }
.section--problem .split-text p { margin-bottom: 0; font-size: 1rem; }
.split-cards--row {
  grid-template-columns: repeat(3, 1fr);
  gap: 1.3rem;
}
.split-cards--row .glass-card { padding: 1.6rem; }
.split-cards--row h3 { font-size: 1.15rem; }
.split-cards--row p { font-size: 0.9rem; }

/* ---------- Glass cards ---------- */
.glass-card {
  background: linear-gradient(160deg, #ffffff, #fbfcfe);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.9rem;
  box-shadow: var(--shadow-soft);
  transition: transform 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
  position: relative;
  overflow: hidden;
}
.glass-card::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
  opacity: 0;
  transition: opacity 0.3s ease;
}
.glass-card:hover {
  transform: translateY(-4px);
  border-color: rgba(26, 86, 219, 0.35);
  box-shadow: var(--shadow-hover);
}
.glass-card:hover::before { opacity: 1; }
.glass-card h3 {
  font-family: var(--font-display);
  font-size: 1.3rem;
  color: var(--text);
  margin-bottom: 0.6rem;
}
.glass-card p { color: var(--text-dim); font-size: 0.96rem; }

.card-tag {
  font-family: var(--font-display);
  font-size: 0.68rem;
  letter-spacing: 0.28em;
  color: var(--accent);
  margin-bottom: 0.9rem;
}

.card-icon {
  width: 42px; height: 42px;
  display: grid;
  place-items: center;
  color: var(--accent);
  font-size: 1.1rem;
  border: 1px solid rgba(26, 86, 219, 0.3);
  border-radius: 10px;
  margin-bottom: 1.2rem;
  background: rgba(26, 86, 219, 0.04);
}

/* ---------- Grids ---------- */
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.4rem; }
.compute-row { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.4rem; }

/* ---------- Brain ---------- */
.brain-block {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 3.5rem;
  align-items: center;
}
.brain-core { position: relative; width: 320px; height: 320px; margin: 0 auto; }
.core-ring {
  position: absolute;
  inset: 0;
  border-radius: 50%;
  border: 1px solid rgba(26, 86, 219, 0.25);
}
.core-ring--2 { inset: 12%; border-color: rgba(14, 165, 233, 0.3); animation: spin 14s linear infinite; }
.core-ring--3 { inset: 24%; border-style: dashed; border-color: rgba(26, 86, 219, 0.3); animation: spin 22s linear infinite reverse; }
.core-ring--2::before, .core-ring--3::before {
  content: "";
  position: absolute;
  top: -5px; left: 50%;
  width: 10px; height: 10px;
  border-radius: 50%;
  background: var(--accent-soft);
}
.core-ring--3::before { background: var(--accent); }
.core-node {
  position: absolute;
  inset: 40%;
  display: grid;
  place-items: center;
  font-family: var(--font-display);
  font-weight: 700;
  letter-spacing: 0.08em;
  font-size: 1.1rem;
  color: #fff;
  background: linear-gradient(135deg, var(--accent), var(--accent-soft));
  border-radius: 50%;
  box-shadow: var(--shadow-hover);
}

.brain-features { display: grid; gap: 1.4rem; }
.feature {
  display: grid;
  grid-template-columns: 92px 1fr;
  gap: 1.3rem;
  align-items: start;
  padding: 1.4rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #ffffff;
  box-shadow: var(--shadow-soft);
  transition: border-color 0.3s ease, box-shadow 0.3s ease;
}
.feature:hover { border-color: rgba(26, 86, 219, 0.35); box-shadow: var(--shadow-hover); }
.feature-num {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.9rem;
  color: var(--accent-soft);
}
.feature h3 { font-family: var(--font-display); font-size: 1.12rem; color: var(--text); margin-bottom: 0.35rem; }
.feature p { color: var(--text-dim); font-size: 0.93rem; }

/* ---------- Roles ---------- */
.role-list { display: grid; gap: 1.1rem; }
.role {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.7rem 2rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #ffffff;
  box-shadow: var(--shadow-soft);
  text-decoration: none;
  color: var(--text);
  transition: border-color 0.3s ease, transform 0.3s ease, box-shadow 0.3s ease;
}
.role:hover {
  border-color: rgba(26, 86, 219, 0.35);
  transform: translateX(6px);
  box-shadow: var(--shadow-hover);
}
.role h3 { font-family: var(--font-display); font-size: 1.18rem; margin-bottom: 0.3rem; }
.role p { color: var(--text-dim); font-size: 0.94rem; }
.role-arrow { color: var(--accent); font-size: 1.5rem; transition: transform 0.3s ease; }
.role:hover .role-arrow { transform: translateX(6px); }

/* ---------- Contact ---------- */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: start;
}
.contact-info { margin-top: 2.2rem; display: grid; gap: 1rem; }
.contact-info div {
  display: flex;
  gap: 1rem;
  color: var(--text-dim);
  font-size: 0.98rem;
}
.contact-info span {
  min-width: 60px;
  font-family: var(--font-display);
  font-size: 0.72rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--accent);
  padding-top: 0.15rem;
}

.contact-form {
  display: grid;
  gap: 1.2rem;
  padding: 2.2rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(160deg, #ffffff, #fbfcfe);
  box-shadow: var(--shadow-soft);
}
.contact-form label { display: grid; gap: 0.5rem; }
.contact-form span {
  font-family: var(--font-display);
  font-size: 0.78rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--text-dim);
}
.contact-form input,
.contact-form textarea {
  background: #fbfcfe;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 0.85rem 1rem;
  color: var(--text);
  font-family: var(--font-body);
  font-size: 0.95rem;
  transition: border-color 0.25s ease, box-shadow 0.25s ease;
  resize: vertical;
}
.contact-form input:focus,
.contact-form textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(26, 86, 219, 0.12);
}
.contact-form input::placeholder,
.contact-form textarea::placeholder { color: rgba(91, 100, 120, 0.5); }
.form-note { color: #0e9f6e; font-size: 0.9rem; }

/* ---------- Footer ---------- */
.footer {
  border-top: 1px solid var(--line);
  padding: 3.5rem 1.5rem;
  background: var(--bg-2);
}
.footer-inner {
  max-width: var(--maxw);
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
}
.footer-brand {
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
}
.footer-tag { color: var(--text-dim); font-size: 0.95rem; }
.footer-side {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 1rem;
}
.footer-links { display: flex; gap: 2rem; flex-wrap: wrap; }
.footer-links a { color: var(--text-dim); text-decoration: none; font-size: 0.88rem; transition: color 0.2s ease; }
.footer-links a:hover { color: var(--accent); }
.footer-legal { color: rgba(91, 100, 120, 0.7); font-size: 0.8rem; }

/* ---------- Reveal animations ---------- */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}
.reveal.visible { opacity: 1; transform: none; }

/* ---------- Responsive ---------- */
@media (max-width: 1300px) {
  .tech-visual { display: none; }
  .tech-bottom { padding-right: 0; }
}

@media (max-width: 1200px) {
  .hero { justify-content: flex-start; }
  .qubit-field { display: none; }
}

@media (max-width: 960px) {
  .split, .brain-block, .contact-grid { grid-template-columns: 1fr; }
  .grid-3, .compute-row, .split-cards--row { grid-template-columns: 1fr; }
  .tech-grid { grid-template-columns: 1fr; }
  .build-grid { grid-template-columns: 1fr; }
  .card-list { grid-template-columns: 1fr; }
  .timeline::before { left: 22px; transform: none; }
  .timeline-item.right,
  .timeline-item.left { width: 100%; padding: 0 0 0 3.5rem; text-align: left; }
  .timeline-item.right .timeline-num,
  .timeline-item.left .timeline-num { left: 22px; right: auto; transform: translate(-50%, -50%); }
  .problem-head { grid-template-columns: 1fr; gap: 1.2rem; align-items: start; }
  .hero-stats { gap: 2rem; }
}

@media (max-width: 760px) {
  .section { padding: 6rem 1.2rem; }
  .nav-links, .nav-cta { display: none; }
  .menu-toggle { display: flex; }
  .mobile-menu.open { display: flex; }
  .hero-orbit, .qubit-field { display: none; }
  .brain-core { width: 240px; height: 240px; }
  .feature { grid-template-columns: 1fr; gap: 0.4rem; }
  .role { padding: 1.3rem 1.4rem; }
  .hero-actions { margin-bottom: 3rem; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
  .reveal { opacity: 1; transform: none; }
}

/* ============================================================
   KerrQ — Blog Layout & Card Styles
   ============================================================ */

/* Blog Page Title Section */
.blog-header {
  padding-bottom: 2rem;
  border-bottom: 1px solid var(--line);
  margin-bottom: 3.5rem;
}

/* Blog Post List Grid */
.blog-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
  gap: 2.2rem;
  margin-top: 2rem;
}

/* Blog Post Card */
.blog-card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.3s ease, border-color 0.3s ease;
  text-decoration: none;
  color: inherit;
  height: 100%;
}

.blog-card:hover {
  transform: translateY(-6px);
  border-color: var(--accent);
  box-shadow: var(--shadow-hover);
}

.blog-card-img-wrapper {
  position: relative;
  width: 100%;
  padding-top: 56.25%; /* 16:9 Aspect Ratio */
  background: var(--bg-2);
  overflow: hidden;
  border-bottom: 1px solid var(--line);
}

.blog-card-img {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.blog-card:hover .blog-card-img {
  transform: scale(1.05);
}

.blog-card-body {
  padding: 1.8rem;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.blog-card-tag {
  align-self: flex-start;
  background: rgba(26, 86, 219, 0.08);
  color: var(--accent);
  font-family: var(--font-display);
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.3rem 0.8rem;
  border-radius: 20px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 1rem;
}

.blog-card-title {
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: 0.8rem;
  color: var(--text);
  transition: color 0.2s ease;
}

.blog-card:hover .blog-card-title {
  color: var(--accent);
}

.blog-card-excerpt {
  color: var(--text-dim);
  font-size: 0.95rem;
  line-height: 1.5;
  margin-bottom: 1.5rem;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.blog-card-meta {
  margin-top: auto;
  display: flex;
  align-items: center;
  gap: 0.8rem;
  font-size: 0.82rem;
  color: var(--text-dim);
  border-top: 1px solid var(--line);
  padding-top: 1.2rem;
}

.blog-card-author-img {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--line);
  object-fit: cover;
}

/* Full Blog Post Styles */
.blog-post-container {
  max-width: 800px;
  margin: 0 auto;
  padding: 8.5rem 1.5rem 4rem;
}

.blog-post-header {
  text-align: center;
  margin-bottom: 3.5rem;
}

.blog-post-category {
  display: inline-block;
  background: rgba(26, 86, 219, 0.08);
  color: var(--accent);
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.82rem;
  padding: 0.4rem 1rem;
  border-radius: 20px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 1.5rem;
}

.blog-post-title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 5vw, 3.2rem);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.02em;
  color: var(--text);
  margin-bottom: 1.5rem;
}

.blog-post-meta {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 1.2rem;
  color: var(--text-dim);
  font-size: 0.95rem;
}

.blog-post-author {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-weight: 500;
  color: var(--text);
}

.blog-post-author img {
  width: 36px;
  height: 36px;
  border-radius: 50%;
}

.blog-post-hero-image {
  width: 100%;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  box-shadow: var(--shadow-soft);
  margin-bottom: 3.5rem;
  aspect-ratio: 16/9;
  object-fit: cover;
}

/* Blog Content Typography */
.blog-post-body {
  font-family: var(--font-body);
  font-size: 1.125rem;
  line-height: 1.8;
  color: var(--text);
}

.blog-post-body p {
  margin-bottom: 1.8rem;
}

.blog-post-body h2 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.8rem;
  margin-top: 3rem;
  margin-bottom: 1.2rem;
  color: var(--text);
  letter-spacing: -0.01em;
}

.blog-post-body h3 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.4rem;
  margin-top: 2rem;
  margin-bottom: 1rem;
  color: var(--text);
}

.blog-post-body ul, .blog-post-body ol {
  margin-bottom: 1.8rem;
  padding-left: 1.5rem;
}

.blog-post-body li {
  margin-bottom: 0.6rem;
}

.blog-post-body blockquote {
  border-left: 4px solid var(--accent);
  padding: 1rem 1.8rem;
  margin: 2.2rem 0;
  background: var(--bg-2);
  border-radius: 0 var(--radius) var(--radius) 0;
  font-style: italic;
  font-size: 1.2rem;
  color: var(--text-dim);
}

.blog-post-body blockquote p {
  margin-bottom: 0;
}

.blog-post-body figure {
  margin: 2.5rem 0;
}

.blog-post-body figure img {
  width: 100%;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  box-shadow: var(--shadow-soft);
}

.blog-post-body figure figcaption {
  text-align: center;
  font-size: 0.88rem;
  color: var(--text-dim);
  margin-top: 0.8rem;
}

/* Callout Box inside post */
.blog-callout {
  background: rgba(26, 86, 219, 0.03);
  border: 1px solid rgba(26, 86, 219, 0.12);
  border-radius: var(--radius);
  padding: 2rem;
  margin: 2.5rem 0;
}

.blog-callout h4 {
  font-family: var(--font-display);
  color: var(--accent);
  font-size: 1.15rem;
  margin-bottom: 0.6rem;
}

.blog-callout p {
  margin-bottom: 0;
  font-size: 1.05rem;
  color: var(--text-dim);
}

/* Code Snippets */
.blog-post-body pre {
  background: #0f172a;
  color: #f8fafc;
  padding: 1.5rem;
  border-radius: 12px;
  overflow-x: auto;
  font-family: monospace;
  font-size: 0.95rem;
  margin-bottom: 1.8rem;
}

.blog-post-body code {
  font-family: monospace;
  background: var(--bg-2);
  color: #dc2626;
  padding: 0.2rem 0.4rem;
  border-radius: 4px;
  font-size: 0.9em;
}

.blog-post-body pre code {
  background: transparent;
  color: inherit;
  padding: 0;
  font-size: inherit;
}

/* Back Link */
.blog-back-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--accent);
  text-decoration: none;
  font-weight: 500;
  font-family: var(--font-display);
  margin-bottom: 2rem;
  transition: transform 0.2s ease;
}

.blog-back-link:hover {
  transform: translateX(-4px);
}

@media (max-width: 760px) {
  .blog-grid {
    grid-template-columns: 1fr;
  }
  .blog-post-container {
    padding: 2rem 1.2rem;
  }
  .blog-post-header {
    margin-bottom: 2rem;
  }
}