/* Keystone Brief — independent company profile visual system */

:root {
  --kb-ink: #111827;
  --kb-mute: #3f4f63;
  --kb-fog: #F1F5F9;
  --kb-panel: #FFFFFF;
  --kb-cobalt: #2563EB;
  --kb-sky: #38BDF8;
  --kb-gold: #EAB308;
  --kb-void: #0F172A;
  --kb-line: rgba(17, 24, 39, 0.1);
  --font-display: 'Archivo', 'Segoe UI', sans-serif;
  --font-body: 'Literata', Georgia, serif;
  --kb-ease: cubic-bezier(0.22, 1, 0.36, 1);
  --kb-wedge: polygon(0 0, 100% 0, 100% 78%, 88% 100%, 0 100%);
}

*, *::before, *::after { box-sizing: border-box; }

body.kb-body {
  margin: 0;
  font-family: var(--font-body);
  color: var(--kb-ink);
  background:
    radial-gradient(920px 500px at 100% -8%, rgba(37, 99, 235, 0.14), transparent 55%),
    radial-gradient(760px 440px at -10% 30%, rgba(234, 179, 8, 0.1), transparent 50%),
    linear-gradient(168deg, #E2E8F0 0%, var(--kb-fog) 48%, #D8E0EB 100%);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

.kb-root { min-height: 100vh; display: flex; flex-direction: column; }
.page-main { flex: 1; }

.kb-brief {
  position: relative;
  width: min(100% - 1.35rem, 1120px);
  margin: 0 auto;
  padding: 1.15rem 0 2.75rem;
  isolation: isolate;
}

.kb-wash {
  position: absolute;
  inset: 0 0 auto;
  height: 22rem;
  z-index: 0;
  pointer-events: none;
  background:
    conic-gradient(from 210deg at 70% 25%, rgba(37, 99, 235, 0.14), transparent 40%, rgba(56, 189, 248, 0.1), transparent 70%);
  filter: blur(1px);
  mask-image: linear-gradient(180deg, #000 40%, transparent);
  -webkit-mask-image: linear-gradient(180deg, #000 40%, transparent);
}

/* ——— Chrome ——— */
.kb-chrome {
  position: relative;
  z-index: 2;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.kb-mark {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  text-decoration: none;
  color: inherit;
}

.kb-mark em {
  font-style: normal;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 0.78rem;
  letter-spacing: 0.04em;
  width: 2.5rem;
  height: 2.5rem;
  display: grid;
  place-items: center;
  color: #fff;
  background: linear-gradient(145deg, var(--kb-cobalt), #1e3a8a);
  clip-path: polygon(50% 0%, 100% 25%, 100% 75%, 50% 100%, 0% 75%, 0% 25%);
  transition: transform 0.35s var(--kb-ease), filter 0.25s ease;
}

.kb-mark:hover em {
  transform: rotate(15deg) scale(1.05);
  filter: brightness(1.08);
}

.kb-mark span {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.05rem;
  letter-spacing: -0.03em;
}

.kb-chrome-links {
  display: flex;
  gap: 0.15rem;
}

.kb-chrome-links a {
  font-family: var(--font-display);
  text-decoration: none;
  color: var(--kb-ink);
  font-weight: 650;
  font-size: 0.9rem;
  padding: 0.45rem 0.75rem;
  border-radius: 0.4rem;
  transition: background 0.2s ease, color 0.2s ease;
}

.kb-chrome-links a:hover {
  background: rgba(37, 99, 235, 0.1);
  color: #1d4ed8;
}

.kb-kicker {
  margin: 0 0 0.4rem;
  font-family: var(--font-display);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--kb-cobalt);
}

.kb-kicker-on-dark { color: var(--kb-gold); }

/* ——— Grid areas ——— */
.kb-grid {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 1rem;
  grid-template-columns: 1.15fr 0.85fr;
  grid-template-areas:
    "mast mission"
    "timeline timeline"
    "values registry";
}

.kb-mast { grid-area: mast; }
.kb-mission { grid-area: mission; }
.kb-timeline { grid-area: timeline; }
.kb-values { grid-area: values; }
.kb-registry { grid-area: registry; }

@media (max-width: 920px) {
  .kb-grid {
    grid-template-columns: 1fr;
    grid-template-areas:
      "mast"
      "mission"
      "timeline"
      "values"
      "registry";
  }
}

.kb-mast {
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: clamp(0.5rem, 2vw, 1rem) 0;
}

.kb-mast h1 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  letter-spacing: -0.05em;
  font-size: clamp(2.3rem, 7vw, 4rem);
  line-height: 0.98;
  background: linear-gradient(120deg, #0F172A 10%, #2563EB 55%, #0369A1 90%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

/* ——— Mission ——— */
.kb-mission {
  position: relative;
  padding: clamp(1.2rem, 3vw, 1.65rem);
  background: linear-gradient(155deg, #0F172A 0%, #1E3A5F 100%);
  color: #F8FAFC;
  clip-path: var(--kb-wedge);
  min-height: 11rem;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  overflow: hidden;
}

.kb-mission::before {
  content: '';
  position: absolute;
  inset: -20% -10% auto 40%;
  height: 12rem;
  background: radial-gradient(circle, rgba(56, 189, 248, 0.28), transparent 65%);
  pointer-events: none;
}

.kb-mission-copy {
  position: relative;
  z-index: 1;
  margin: 0;
  font-size: clamp(1.05rem, 2.4vw, 1.28rem);
  line-height: 1.45;
  font-weight: 500;
  max-width: 28ch;
}

/* ——— Timeline / history ——— */
.kb-timeline {
  padding: clamp(1.15rem, 2.5vw, 1.55rem);
  border-radius: 1.35rem;
  background: var(--kb-panel);
  box-shadow: 0 16px 40px rgba(15, 23, 42, 0.05);
  position: relative;
}

.kb-timeline::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  padding: 1.5px;
  background: linear-gradient(120deg, rgba(37, 99, 235, 0.55), rgba(56, 189, 248, 0.25), rgba(234, 179, 8, 0.45));
  -webkit-mask:
    linear-gradient(#000 0 0) content-box,
    linear-gradient(#000 0 0);
  -webkit-mask-composite: xor;
  mask:
    linear-gradient(#000 0 0) content-box,
    linear-gradient(#000 0 0);
  mask-composite: exclude;
  pointer-events: none;
}

.kb-section-head {
  margin-bottom: 1rem;
  position: relative;
  z-index: 1;
}

.kb-section-head h2 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  letter-spacing: -0.03em;
  font-size: clamp(1.35rem, 3vw, 1.7rem);
}

.kb-arc {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.65rem;
  position: relative;
  z-index: 1;
  container-type: inline-size;
  container-name: arc;
}

@container arc (max-width: 700px) {
  .kb-arc { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 640px) {
  .kb-arc { grid-template-columns: 1fr; }

  .kb-chrome {
    flex-wrap: wrap;
    align-items: flex-start;
    gap: 0.65rem;
  }

  .kb-chrome-links {
    flex-wrap: wrap;
    width: 100%;
    justify-content: flex-start;
  }

  .kb-chrome-links a {
    font-size: 0.8rem;
    padding: 0.4rem 0.55rem;
  }
}

.kb-arc-node {
  position: relative;
  padding: 1rem 0.95rem 1.1rem;
  border-radius: 1rem;
  background: linear-gradient(165deg, #F8FAFC, #EEF2FF);
  overflow: hidden;
  animation: kb-rise 0.55s var(--kb-ease) both;
  animation-delay: calc(var(--kb-i, 0) * 70ms);
}

.kb-arc-node::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 4px;
  background: linear-gradient(180deg, var(--kb-cobalt), var(--kb-gold));
  clip-path: polygon(0 0, 100% 8%, 100% 92%, 0 100%);
}

.kb-arc-node em {
  display: block;
  font-style: normal;
  font-family: var(--font-display);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--kb-cobalt);
  margin-bottom: 0.35rem;
}

.kb-arc-node strong {
  display: block;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1rem, 2.2cqi, 1.12rem);
  letter-spacing: -0.02em;
  margin-bottom: 0.35rem;
}

.kb-arc-node p {
  margin: 0;
  color: var(--kb-mute);
  font-size: 0.92rem;
  line-height: 1.45;
}

@keyframes kb-rise {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ——— Values ——— */
.kb-values {
  padding: clamp(1.1rem, 2.5vw, 1.45rem);
  border-radius: 1.35rem;
  background: rgba(255, 255, 255, 0.72);
  border: 1px solid rgba(255, 255, 255, 0.85);
}

.kb-value-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.65rem;
}

@media (max-width: 520px) {
  .kb-value-grid { grid-template-columns: 1fr; }
}

.kb-value {
  position: relative;
  padding: 1.1rem 1rem 1.15rem;
  background: linear-gradient(150deg, #0F172A, #1E293B);
  color: #F1F5F9;
  clip-path: polygon(0 0, 100% 0, 100% 85%, 88% 100%, 0 100%);
  min-height: 9.5rem;
  transition: transform 0.3s var(--kb-ease);
}

.kb-value:hover { transform: translateY(-3px); }

.kb-value:nth-child(even) {
  background: linear-gradient(150deg, #1E3A8A, #2563EB);
}

.kb-value em {
  font-style: normal;
  font-family: var(--font-display);
  font-size: 0.75rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  color: var(--kb-gold);
}

.kb-value h3 {
  margin: 0.45rem 0 0.35rem;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.05rem, 2.5vw, 1.2rem);
  letter-spacing: -0.02em;
}

.kb-value p {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.45;
  color: rgba(241, 245, 249, 0.78);
}

/* ——— Registry ——— */
.kb-registry {
  padding: clamp(1.15rem, 2.5vw, 1.5rem);
  border-radius: 1.35rem;
  background: linear-gradient(165deg, #0F172A 0%, #172554 100%);
  color: #E2E8F0;
  align-self: stretch;
}

.kb-registry h2 {
  margin: 0 0 1.1rem;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.25rem, 2.8vw, 1.5rem);
  letter-spacing: -0.03em;
  color: #fff;
}

.kb-facts {
  margin: 0;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.65rem;
}

.kb-facts-wide { grid-column: 1 / -1; }

.kb-facts > div {
  padding: 0.7rem 0.8rem;
  border-radius: 0.7rem;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.kb-facts dt {
  margin: 0 0 0.2rem;
  font-family: var(--font-display);
  font-size: 0.68rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: rgba(234, 179, 8, 0.85);
  font-weight: 700;
}

.kb-facts dd {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.4;
  word-break: break-word;
  font-weight: 500;
}

.kb-facts a {
  color: var(--kb-sky);
  text-decoration: none;
  font-weight: 600;
}

.kb-facts a:hover { text-decoration: underline; }

/* ——— Footer ——— */
.kb-foot {
  margin-top: auto;
  padding: 1rem clamp(1.25rem, 4vw, 2.5rem) 1.5rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.5rem;
  justify-content: space-between;
  color: var(--kb-mute);
  font-size: 0.85rem;
  font-family: var(--font-display);
  border-top: 1px solid var(--kb-line);
}

.kb-foot a {
  color: var(--kb-cobalt);
  text-decoration: none;
  font-weight: 650;
}

.kb-foot a:hover { text-decoration: underline; }

@media (prefers-reduced-motion: reduce) {
  .kb-arc-node,
  .kb-value,
  .kb-mark em { animation: none; transition: none; }
}