/* =========================================================
   KAIROS — Showcase site
   Dark editorial SaaS, with optional warm sand accent
   ========================================================= */

:root {
  /* base */
  --bg: #0a0a0b;
  --bg-2: #111114;
  --bg-3: #16161a;
  --surface: #1a1a1f;
  --line: #25252b;
  --line-strong: #34343c;
  --fg: #f4f4f5;
  --fg-2: #c5c5cc;
  --fg-3: #8a8a94;
  --fg-4: #5a5a65;

  /* accent — sand (default) */
  --accent: oklch(0.78 0.12 75);
  --accent-soft: oklch(0.78 0.12 75 / 0.18);
  --accent-line: oklch(0.78 0.12 75 / 0.45);
  --accent-glow: oklch(0.78 0.12 75 / 0.25);
  --accent-fg: #0a0a0b;

  /* type */
  --font-display: "Space Grotesk", -apple-system, BlinkMacSystemFont, sans-serif;
  --font-body: "Inter", -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, SFMono-Regular, monospace;

  /* layout */
  --maxw: 1240px;
  --pad-section: 140px;
  --radius: 14px;
  --radius-sm: 8px;
}

[data-accent="cobalt"] {
  --accent: oklch(0.65 0.18 255);
  --accent-soft: oklch(0.65 0.18 255 / 0.18);
  --accent-line: oklch(0.65 0.18 255 / 0.45);
  --accent-glow: oklch(0.65 0.18 255 / 0.25);
  --accent-fg: #0a0a0b;
}
[data-accent="lime"] {
  --accent: oklch(0.84 0.16 130);
  --accent-soft: oklch(0.84 0.16 130 / 0.18);
  --accent-line: oklch(0.84 0.16 130 / 0.45);
  --accent-glow: oklch(0.84 0.16 130 / 0.25);
  --accent-fg: #0a0a0b;
}
[data-accent="none"] {
  --accent: #f4f4f5;
  --accent-soft: rgba(244, 244, 245, 0.10);
  --accent-line: rgba(244, 244, 245, 0.32);
  --accent-glow: rgba(244, 244, 245, 0.10);
  --accent-fg: #0a0a0b;
}

[data-theme="light"] {
  --bg: #f7f6f3;
  --bg-2: #efeee9;
  --bg-3: #e8e6e0;
  --surface: #ffffff;
  --line: #e2e0d8;
  --line-strong: #cdcabd;
  --fg: #111114;
  --fg-2: #2c2c30;
  --fg-3: #6a6a72;
  --fg-4: #9a9aa0;
}

[data-density="compact"] {
  --pad-section: 96px;
}

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

html, body {
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  font-feature-settings: "ss01", "cv11";
  scroll-behavior: smooth;
}

body { overflow-x: hidden; }

::selection { background: var(--accent); color: var(--accent-fg); }

a { color: inherit; text-decoration: none; }

/* ------- typography ------- */
.eyebrow {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--fg-3);
  display: inline-flex;
  align-items: center;
  gap: 10px;
}
.eyebrow::before {
  content: "";
  width: 22px;
  height: 1px;
  background: var(--accent);
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 500;
  letter-spacing: -0.02em;
  line-height: 1.05;
  text-wrap: balance;
}

h2.section-title {
  font-size: clamp(36px, 4.4vw, 60px);
  margin-top: 18px;
  margin-bottom: 22px;
}

.lead {
  font-size: 18px;
  color: var(--fg-2);
  max-width: 62ch;
  text-wrap: pretty;
}

/* ------- layout ------- */
.container {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 32px;
}

section {
  padding: var(--pad-section) 0;
  position: relative;
}

.section-head {
  display: flex;
  flex-direction: column;
  gap: 0;
  margin-bottom: 64px;
  max-width: 920px;
}

/* ------- nav ------- */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 50;
  padding: 18px 0;
  background: color-mix(in oklab, var(--bg) 78%, transparent);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s, background 0.2s;
}
.nav.scrolled { border-bottom-color: var(--line); }
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.nav-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-family: var(--font-display);
  letter-spacing: 0.14em;
  font-weight: 500;
  font-size: 15px;
}
.nav-logo svg { width: 22px; height: 22px; color: var(--fg); }
.nav-links {
  display: flex;
  gap: 30px;
  font-size: 13px;
  color: var(--fg-3);
}
.nav-links a { transition: color 0.15s; }
.nav-links a:hover { color: var(--fg); }
.nav-cta {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  padding: 10px 16px;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  transition: all 0.18s;
}
.nav-cta:hover { border-color: var(--accent-line); color: var(--accent); }

@media (max-width: 820px) {
  .nav-links { display: none; }
}

/* ------- hero ------- */
.hero {
  min-height: 100vh;
  padding-top: 140px;
  padding-bottom: 80px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  position: relative;
  overflow: hidden;
}
.hero-grid-bg {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, var(--line) 1px, transparent 1px),
    linear-gradient(to bottom, var(--line) 1px, transparent 1px);
  background-size: 80px 80px;
  mask-image: radial-gradient(ellipse 70% 60% at 50% 45%, black 30%, transparent 80%);
  -webkit-mask-image: radial-gradient(ellipse 70% 60% at 50% 45%, black 30%, transparent 80%);
  opacity: 0.6;
  pointer-events: none;
}
[data-show-grid="false"] .hero-grid-bg { display: none; }

.hero-glow {
  position: absolute;
  width: 700px; height: 700px;
  left: 50%;
  top: 30%;
  transform: translate(-50%, -50%);
  background: radial-gradient(circle, var(--accent-glow), transparent 60%);
  pointer-events: none;
  filter: blur(40px);
}

.hero-inner {
  position: relative;
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 80px;
  align-items: center;
}
@media (max-width: 980px) {
  .hero-inner { grid-template-columns: 1fr; gap: 56px; }
}

.hero-mark {
  display: flex;
  justify-content: center;
  position: relative;
}
.hero-mark-stage {
  width: min(520px, 100%);
  aspect-ratio: 1;
  border: 1px solid var(--line);
  border-radius: 50%;
  display: grid;
  place-items: center;
  position: relative;
  background:
    radial-gradient(circle at 50% 50%, var(--bg-2), transparent 70%);
}
.hero-mark-stage::before,
.hero-mark-stage::after {
  content: "";
  position: absolute;
  inset: 28px;
  border: 1px solid var(--line);
  border-radius: 50%;
  border-top-color: var(--fg-3);
  animation: hero-ring-spin 22s linear infinite;
}
.hero-mark-stage::after {
  inset: 56px;
  border-top-color: transparent;
  border-left-color: var(--fg-3);
  animation: hero-ring-spin-rev 16s linear infinite;
}
@keyframes hero-ring-spin {
  from { transform: rotate(0deg); }
  to   { transform: rotate(360deg); }
}
@keyframes hero-ring-spin-rev {
  from { transform: rotate(0deg); }
  to   { transform: rotate(-360deg); }
}
@keyframes hero-mark-breathe {
  0%, 100% { transform: scale(1); }
  50%      { transform: scale(1.05); }
}
@keyframes hero-mark-glow {
  0%, 100% { filter: drop-shadow(0 0 0 transparent); }
  50%      { filter: drop-shadow(0 0 24px rgba(255, 255, 255, 0.18)); }
}
@keyframes hero-tick-in {
  from { opacity: 0; }
  to   { opacity: 1; }
}
@media (prefers-reduced-motion: reduce) {
  .hero-mark-stage::before,
  .hero-mark-stage::after,
  .hero-mark svg.kairos-mark,
  .hero-mark-tick { animation: none !important; }
}
.hero-mark svg.kairos-mark {
  width: 38%;
  height: 38%;
  color: var(--fg);
  position: relative;
  z-index: 2;
  animation:
    hero-mark-breathe 7s ease-in-out infinite,
    hero-mark-glow 7s ease-in-out infinite;
  transform-origin: center;
}
.hero-mark-tick {
  position: absolute;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.2em;
  color: var(--fg-3);
  text-transform: uppercase;
  opacity: 0;
  animation: hero-tick-in 0.7s ease-out forwards;
}
.hero-mark-tick.t-1 { top: 10px; left: 50%; transform: translateX(-50%); animation-delay: 0.4s; }
.hero-mark-tick.t-2 { right: 4px; top: 50%; transform: translateY(-50%) rotate(90deg); transform-origin: center; animation-delay: 0.7s; }
.hero-mark-tick.t-3 { bottom: 10px; left: 50%; transform: translateX(-50%); color: var(--accent); animation-delay: 1.0s; }
.hero-mark-tick.t-4 { left: 4px; top: 50%; transform: translateY(-50%) rotate(-90deg); transform-origin: center; animation-delay: 1.3s; }

.hero h1 {
  font-size: clamp(46px, 6.4vw, 92px);
  font-weight: 400;
  margin-top: 24px;
  margin-bottom: 28px;
}
.hero h1 em {
  font-style: normal;
  color: var(--accent);
  font-weight: 500;
}
.hero p.lead { font-size: 19px; }

.hero-meta {
  display: flex;
  gap: 28px;
  margin-top: 44px;
  padding-top: 28px;
  border-top: 1px solid var(--line);
  flex-wrap: wrap;
}
.hero-meta-item {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--fg-3);
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.hero-meta-item strong {
  color: var(--fg);
  font-weight: 500;
  font-family: var(--font-display);
  font-size: 18px;
  letter-spacing: 0.02em;
  text-transform: none;
}

.hero-actions {
  display: flex;
  gap: 14px;
  margin-top: 36px;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 24px;
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  border: 1px solid var(--line-strong);
  transition: all 0.18s;
  cursor: pointer;
  background: transparent;
  color: var(--fg);
}
.btn:hover { border-color: var(--accent-line); color: var(--accent); }
.btn-primary {
  background: var(--accent);
  color: var(--accent-fg);
  border-color: var(--accent);
}
.btn-primary:hover {
  background: transparent;
  color: var(--accent);
}
.btn svg { width: 14px; height: 14px; }

/* ------- problem (diagnostic report) ------- */
.problem-section {
  --warn: var(--accent);
  --warn-soft: var(--accent-soft);
  --warn-line: var(--accent-line);
}
.diag {
  list-style: none;
  margin: 0;
  padding: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--bg-2);
  overflow: hidden;
}

/* ---- problem cards (graphic) ---- */
.prob-scene {
  position: relative;
  padding: 8px 0;
}
.prob-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 96px minmax(0, 1fr);
  gap: 18px 0;
  position: relative;
  padding: 10px 0;
  align-items: start;
}
.prob-grid::before {
  content: "";
  position: absolute;
  left: 50%;
  top: 0;
  bottom: 0;
  width: 1px;
  transform: translateX(-50%);
  background: linear-gradient(
    180deg,
    transparent 0%,
    color-mix(in srgb, var(--accent) 55%, var(--line)) 10%,
    color-mix(in srgb, var(--accent) 28%, var(--line)) 90%,
    transparent 100%
  );
}

.prob-card {
  position: relative;
  background: var(--bg-2);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 32px 32px 32px 36px;
  overflow: hidden;
  max-width: 520px;
  box-shadow: 0 18px 40px -34px rgba(0, 0, 0, 0.72);
  transition: border-color 0.2s, transform 0.2s, background 0.2s, box-shadow 0.2s;
}
.prob-card:hover {
  border-color: var(--warn-line);
  background: var(--bg-3);
  box-shadow: 0 22px 44px -34px rgba(0, 0, 0, 0.78);
  transform: translateY(-2px);
}
.prob-card::before {
  content: "";
  position: absolute;
  top: 40px;
  width: 48px;
  height: 1px;
  background: color-mix(in srgb, var(--accent) 48%, var(--line));
}
.prob-card::after {
  content: "";
  position: absolute;
  top: 34px;
  width: 13px;
  height: 13px;
  border-radius: 50%;
  border: 2px solid var(--accent);
  background: var(--bg);
  box-shadow: 0 0 0 6px var(--bg);
}
.prob-card:nth-child(1) {
  grid-column: 1 / 2;
  grid-row: 1;
  justify-self: end;
}
.prob-card:nth-child(2) {
  grid-column: 3 / 4;
  grid-row: 1;
  justify-self: start;
  margin-top: 72px;
}
.prob-card:nth-child(3) {
  grid-column: 1 / 2;
  grid-row: 2;
  justify-self: end;
  margin-top: -8px;
}
.prob-card:nth-child(4) {
  grid-column: 3 / 4;
  grid-row: 2;
  justify-self: start;
  margin-top: 52px;
}
.prob-card:nth-child(5) {
  grid-column: 1 / 2;
  grid-row: 3;
  justify-self: end;
  margin-top: -20px;
}
.prob-card:nth-child(6) {
  grid-column: 3 / 4;
  grid-row: 3;
  justify-self: start;
  margin-top: 44px;
}
.prob-card:nth-child(odd)::before {
  right: -48px;
}
.prob-card:nth-child(odd)::after {
  right: -54px;
}
.prob-card:nth-child(even)::before {
  left: -48px;
}
.prob-card:nth-child(even)::after {
  left: -54px;
}
.prob-card-bgnum {
  position: absolute;
  right: -8px;
  bottom: -38px;
  font-family: var(--font-display);
  font-size: 180px;
  font-weight: 400;
  line-height: 1;
  letter-spacing: -0.04em;
  color: var(--fg);
  opacity: 0.04;
  pointer-events: none;
  user-select: none;
}
.prob-card-stripe {
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: 6px;
  background-image: repeating-linear-gradient(
    135deg,
    var(--warn) 0 6px,
    transparent 6px 12px
  );
  opacity: 0.55;
}
.prob-card-glyph {
  position: absolute;
  right: 14px;
  top: 12px;
  width: 84px;
  height: 84px;
  color: color-mix(in srgb, var(--fg) 78%, transparent);
  opacity: 0.14;
  z-index: 0;
  pointer-events: none;
}
.prob-card-glyph svg {
  display: block;
  width: 100%;
  height: 100%;
  stroke-width: 1.35;
}
.prob-card-body {
  display: flex;
  flex-direction: column;
  gap: 10px;
  position: relative;
  z-index: 1;
}
.prob-card-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}
.prob-card-n { color: var(--warn); }
.prob-card-tag {
  color: var(--fg-4);
  padding-left: 12px;
  border-left: 1px solid var(--line);
}
.prob-card-title {
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 500;
  letter-spacing: -0.01em;
  line-height: 1.2;
  color: var(--fg);
}
.prob-card-text {
  color: var(--fg-3);
  font-size: 14.5px;
  max-width: 50ch;
}
@media (max-width: 1180px) {
  .prob-grid {
    grid-template-columns: minmax(0, 1fr) 76px minmax(0, 1fr);
  }
  .prob-card::before {
    width: 38px;
  }
  .prob-card:nth-child(odd)::before {
    right: -38px;
  }
  .prob-card:nth-child(even)::before {
    left: -38px;
  }
  .prob-card:nth-child(odd)::after {
    right: -44px;
  }
  .prob-card:nth-child(even)::after {
    left: -44px;
  }
}
@media (max-width: 880px) {
  .prob-grid {
    grid-template-columns: 28px minmax(0, 1fr);
    gap: 14px 0;
    padding: 0;
  }
  .prob-grid::before {
    left: 14px;
    transform: none;
  }
  .prob-card {
    grid-column: 2 / 3 !important;
    grid-row: auto !important;
    justify-self: stretch !important;
    max-width: none;
    margin-top: 0 !important;
  }
  .prob-card::before {
    top: 36px;
    left: -20px !important;
    right: auto !important;
    width: 20px;
  }
  .prob-card::after {
    top: 30px;
    left: -26px !important;
    right: auto !important;
  }
}
@media (max-width: 540px) {
  .prob-scene {
    padding: 0;
  }
  .prob-card { padding: 24px 24px 24px 28px; }
  .prob-card-glyph {
    width: 68px;
    height: 68px;
    right: 10px;
    top: 10px;
  }
  .prob-card-bgnum { font-size: 140px; bottom: -28px; }
}
.diag-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 24px;
  border-bottom: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--fg-4);
  background: var(--bg);
  flex-wrap: wrap;
  gap: 12px;
}
.diag-head-tag { color: var(--warn); }
.diag-list {
  list-style: none;
  margin: 0;
  padding: 0;
}
.diag-row {
  display: grid;
  grid-template-columns: 56px 1fr 180px;
  gap: 28px;
  align-items: flex-start;
  padding: 28px 28px;
  border-bottom: 1px solid var(--line);
  transition: background 0.18s;
  position: relative;
}
.diag-row:last-child { border-bottom: none; }
.diag-row::before {
  content: "";
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: 3px;
  background: var(--warn);
  opacity: 0;
  transition: opacity 0.18s;
}
.diag-row:hover { background: var(--bg-3); }
.diag-row:hover::before { opacity: 1; }
.diag-row-n {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--warn);
  letter-spacing: 0.06em;
  padding-top: 4px;
}
.diag-row-main { display: flex; flex-direction: column; gap: 8px; }
.diag-row-title {
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 500;
  color: var(--fg);
  letter-spacing: -0.01em;
}
.diag-row-body { color: var(--fg-3); font-size: 14.5px; max-width: 60ch; }
.diag-row-tag {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--fg-4);
  text-align: right;
  padding-top: 6px;
}

.diag-detail { display: none; }
.diag-detail-side {
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.diag-detail-label {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--fg-4);
}
.diag-detail-num {
  font-family: var(--font-display);
  font-size: 56px;
  font-weight: 400;
  letter-spacing: -0.03em;
  line-height: 1;
  color: var(--warn);
}

.diag-detail-main h3 {
  font-size: 24px;
  font-weight: 500;
  margin-bottom: 8px;
}
.diag-detail-main p {
  color: var(--fg-2);
  font-size: 14px;
}
@media (max-width: 880px) {
  .diag-row {
    grid-template-columns: 40px 1fr;
    gap: 16px;
    padding: 22px 20px;
  }
  .diag-row-tag { display: none; }
}

/* keep old rules harmless if any markup still references them */
.problem-grid { display: none; }

/* ------- solution (orbit layout) ------- */
.solution-section { overflow: hidden; }
.solution-section .section-head {
  margin-bottom: 56px;
}
.solution-mobile {
  display: none;
}

@keyframes orbit-spin {
  from { transform: rotate(0deg); }
  to   { transform: rotate(360deg); }
}
@keyframes orbit-spin-rev {
  from { transform: rotate(0deg); }
  to   { transform: rotate(-360deg); }
}
@keyframes orbit-float-a {
  0%, 100% { transform: translateY(0); }
  50%      { transform: translateY(-8px); }
}
@keyframes orbit-float-b {
  0%, 100% { transform: translateY(0); }
  50%      { transform: translateY(-6px); }
}
@keyframes orbit-core-pulse {
  0%, 100% { box-shadow: 0 0 0 8px var(--bg), 0 0 60px -20px rgba(0,0,0,0.5); }
  50%      { box-shadow: 0 0 0 8px var(--bg), 0 0 90px -10px rgba(0,0,0,0.65); }
}
@keyframes orbit-mark-glow {
  0%, 100% { filter: drop-shadow(0 0 0 transparent); }
  50%      { filter: drop-shadow(0 0 18px color-mix(in srgb, var(--accent) 32%, transparent)); }
}
@media (prefers-reduced-motion: reduce) {
  .orbit-rings g, .orbit-card, .orbit-core, .orbit-core-mark { animation: none !important; }
}

.orbit {
  position: relative;
  width: 100%;
  max-width: 1240px;
  margin: 0 auto;
  aspect-ratio: 1.25 / 1;
  min-height: 820px;
}

.orbit-rings {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  fill: none;
  stroke: var(--line);
  stroke-width: 0.4;
  pointer-events: none;
  overflow: visible;
}
.orbit-rings g {
  transform-origin: 0 0;
}
.orbit-rings .ring-a {
  animation: orbit-spin-svg 90s linear infinite;
}
.orbit-rings .ring-b {
  animation: orbit-spin-svg-rev 140s linear infinite;
}
.orbit-rings .ring-c {
  animation: orbit-spin-svg 220s linear infinite;
}
@keyframes orbit-spin-svg {
  from { transform: rotate(0deg); }
  to   { transform: rotate(360deg); }
}
@keyframes orbit-spin-svg-rev {
  from { transform: rotate(0deg); }
  to   { transform: rotate(-360deg); }
}

.orbit-core {
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  width: 200px;
  height: 200px;
  border-radius: 50%;
  background: var(--bg-2);
  border: 1px solid var(--line-strong);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
  z-index: 2;
  box-shadow: 0 0 0 8px var(--bg), 0 0 60px -20px rgba(0,0,0,0.5);
  animation: orbit-core-pulse 6s ease-in-out infinite;
}
.orbit-core-mark {
  width: 56px;
  height: 56px;
  color: var(--fg);
  animation: orbit-mark-glow 2.4s ease-in-out infinite;
}
.orbit-core-label {
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 500;
  letter-spacing: 0.18em;
}
.orbit-core-sub {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--fg-4);
}

.orbit-card {
  position: absolute;
  width: 360px;
  background: var(--bg-2);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 28px 30px;
  display: flex;
  flex-direction: column;
  gap: 18px;
  z-index: 3;
  transition: border-color 0.2s, transform 0.2s, background 0.2s;
}
.orbit-card:hover {
  border-color: var(--line-strong);
  background: var(--bg-3);
  transform: translateY(-2px);
}

/* place the 4 cards */
.orbit-card.pos-0 { left: 2%;   top: 6%;    animation: orbit-float-a 7s ease-in-out infinite; animation-delay: 0s;    }
.orbit-card.pos-1 { right: 2%;  top: 6%;    animation: orbit-float-b 8s ease-in-out infinite; animation-delay: -1.5s; }
.orbit-card.pos-2 { right: 2%;  bottom: 6%; animation: orbit-float-a 9s ease-in-out infinite; animation-delay: -3s;   }
.orbit-card.pos-3 { left: 2%;   bottom: 6%; animation: orbit-float-b 7.5s ease-in-out infinite; animation-delay: -2s; }

.orbit-card-icon {
  width: 64px;
  height: 64px;
  border-radius: 14px;
  background: var(--bg);
  border: 1px solid var(--line);
  display: grid;
  place-items: center;
  color: var(--accent);
}
.orbit-card-icon svg { width: 32px; height: 32px; }

.orbit-card-num {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--fg-4);
  display: block;
  margin-bottom: 8px;
}
.orbit-card h3 {
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 500;
  margin: 0 0 10px 0;
  letter-spacing: -0.01em;
}
.orbit-card p {
  color: var(--fg-3);
  font-size: 14.5px;
  line-height: 1.6;
  margin: 0;
}

.orbit-lines-svg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  fill: none;
  stroke: var(--line-strong);
  stroke-width: 0.15;
  vector-effect: non-scaling-stroke;
  z-index: 1;
}
.orbit-lines-svg line {
  stroke-width: 1;
  stroke: var(--line-strong);
  vector-effect: non-scaling-stroke;
}

/* connector lines from each card toward center — replaced by SVG */
.orbit-card::after { display: none; }

@media (max-width: 980px) {
  .solution-section .container {
    padding-left: 24px;
    padding-right: 24px;
  }
  .solution-section .section-head {
    margin-bottom: 28px;
  }
  .solution-section .section-title {
    font-size: clamp(30px, 7vw, 42px);
    margin-top: 14px;
    margin-bottom: 16px;
  }
  .solution-section .lead {
    font-size: 16px;
    max-width: 40ch;
  }
  .orbit {
    display: none;
  }
  .solution-mobile {
    display: flex;
    flex-direction: column;
    gap: 14px;
  }
  .solution-mobile-core {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 20px 18px;
    background: var(--bg-2);
    border: 1px solid var(--line-strong);
    border-radius: 16px;
    box-shadow: 0 0 0 1px color-mix(in srgb, var(--line) 65%, transparent) inset;
  }
  .solution-mobile-core-mark {
    width: 44px;
    height: 44px;
    color: var(--fg);
    flex: 0 0 auto;
    animation: orbit-mark-glow 2.4s ease-in-out infinite;
  }
  .solution-mobile-core-copy {
    display: grid;
    gap: 4px;
  }
  .solution-mobile-core-label {
    font-family: var(--font-display);
    font-size: 17px;
    font-weight: 500;
    letter-spacing: 0.14em;
  }
  .solution-mobile-core-sub {
    font-family: var(--font-mono);
    font-size: 10px;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    color: var(--fg-4);
  }
  .solution-mobile-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
  }
  .solution-mobile-card {
    display: grid;
    grid-template-columns: 48px minmax(0, 1fr);
    gap: 14px;
    align-items: start;
    padding: 18px 16px;
    background: var(--bg-2);
    border: 1px solid var(--line);
    border-radius: 14px;
  }
  .solution-mobile-card-icon {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    background: var(--bg);
    border: 1px solid var(--line);
    display: grid;
    place-items: center;
    color: var(--accent);
  }
  .solution-mobile-card-icon svg {
    width: 22px;
    height: 22px;
  }
  .solution-mobile-card-num {
    display: block;
    margin-bottom: 6px;
    font-family: var(--font-mono);
    font-size: 10px;
    letter-spacing: 0.18em;
    color: var(--fg-4);
  }
  .solution-mobile-card h3 {
    font-size: 18px;
    margin-bottom: 8px;
    line-height: 1.15;
  }
  .solution-mobile-card p {
    font-size: 13.5px;
    line-height: 1.55;
    color: var(--fg-3);
  }
}

@media (max-width: 640px) {
  .solution-section .container {
    padding-left: 20px;
    padding-right: 20px;
  }
  .solution-section .lead {
    max-width: none;
  }
  .solution-mobile-core {
    padding: 18px 16px;
    border-radius: 14px;
  }
  .solution-mobile-card {
    padding: 16px 14px;
    gap: 12px;
  }
}

/* legacy rules kept inert */
.solution-grid { display: none; }

/* ------- criteria pentagon ------- */
.criteria-wrap {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 80px;
  align-items: center;
}
@media (max-width: 980px) { .criteria-wrap { grid-template-columns: 1fr; gap: 48px; } }

.pentagon {
  width: 100%;
  aspect-ratio: 1;
  position: relative;
}
.pentagon svg { width: 100%; height: 100%; overflow: visible; }
.pentagon-sector-hit {
  fill: rgba(0, 0, 0, 0.001);
  cursor: pointer;
}
.pentagon-node {
  cursor: pointer;
  outline: none;
}
.pentagon-node text {
  text-transform: uppercase;
  fill: var(--fg-3);
  transition: fill 0.25s;
}
.pentagon-node.active text,
.pentagon-node:hover text,
.pentagon-node:focus text {
  fill: var(--accent);
}
.pentagon-node-hit,
.pentagon-label-hit {
  fill: transparent;
}
.pentagon-node.active .pentagon-node-hit,
.pentagon-node:hover .pentagon-node-hit,
.pentagon-node:focus .pentagon-node-hit {
  fill: color-mix(in srgb, var(--accent) 14%, transparent);
}
.pentagon-label {
  position: absolute;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--fg-3);
  background: var(--bg);
  padding: 4px 8px;
  border: 1px solid var(--line);
  border-radius: 4px;
  white-space: nowrap;
}

.criteria-list { display: flex; flex-direction: column; gap: 4px; }
.criteria-item {
  padding: 22px 0;
  border-bottom: 1px solid var(--line);
  cursor: pointer;
  display: grid;
  grid-template-columns: 36px 1fr auto;
  gap: 20px;
  align-items: center;
  transition: padding 0.2s;
}
.criteria-item:last-child { border-bottom: none; }
.criteria-item.active { padding-left: 12px; }
.criteria-item-num {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--fg-4);
  letter-spacing: 0.06em;
}
.criteria-item.active .criteria-item-num { color: var(--accent); }
.criteria-item h3 {
  font-size: 22px;
  font-weight: 500;
  color: var(--fg-3);
  transition: color 0.2s;
}
.criteria-item.active h3 { color: var(--fg); }
.criteria-item-arrow {
  font-family: var(--font-mono);
  color: var(--fg-4);
  font-size: 14px;
  opacity: 0;
  transition: opacity 0.2s;
}
.criteria-item.active .criteria-item-arrow { opacity: 1; color: var(--accent); }

.criteria-detail {
  margin-top: 12px;
  padding: 18px 0 0;
  color: var(--fg-2);
  font-size: 14px;
  border-top: 1px dashed var(--line);
  display: none;
  grid-column: 2 / 4;
}
.criteria-item.active .criteria-detail { display: block; }

/* ------- tech ------- */
.tech-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}
@media (max-width: 880px) { .tech-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 480px) { .tech-grid { grid-template-columns: 1fr; } }
.tech-cell {
  padding: 36px 28px;
  border-right: 1px solid var(--line);
  display: flex;
  flex-direction: column;
  gap: 14px;
  min-height: 220px;
  background: var(--bg-2);
  position: relative;
}
.tech-cell:last-child { border-right: none; }
@media (max-width: 880px) {
  .tech-cell { border-bottom: 1px solid var(--line); }
  .tech-cell:nth-child(2n) { border-right: none; }
  .tech-cell:nth-last-child(-n+2) { border-bottom: none; }
}
.tech-cell-tag {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--fg-4);
}
.tech-cell h3 {
  font-size: 19px;
  font-weight: 500;
  margin-top: auto;
}
.tech-cell p { color: var(--fg-3); font-size: 13.5px; }
.tech-cell-icon { width: 28px; height: 28px; color: var(--accent); }

.trl-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--accent);
  border: 1px solid var(--accent-line);
  background: var(--accent-soft);
  padding: 6px 10px;
  border-radius: 4px;
  text-transform: uppercase;
}

/* ------- roadmap ------- */
.roadmap {
  position: relative;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  margin-top: 24px;
}
@media (max-width: 880px) { .roadmap { grid-template-columns: 1fr; } }

.roadmap-line {
  position: absolute;
  top: 60px;
  left: 0; right: 0;
  height: 1px;
  background: var(--line);
}
@media (max-width: 880px) { .roadmap-line { display: none; } }
.roadmap-line-fill {
  position: absolute;
  inset: 0;
  background: linear-gradient(to right, var(--accent), var(--accent) 50%, transparent 50%);
  background-size: 200% 100%;
  animation: roadmap-fill 3s ease-out forwards;
}
@keyframes roadmap-fill {
  from { background-position: 100% 0; }
  to   { background-position: 0% 0; }
}

.roadmap-step {
  position: relative;
  padding: 0 18px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.roadmap-step-dot {
  width: 18px; height: 18px;
  border-radius: 50%;
  background: var(--bg);
  border: 2px solid var(--line-strong);
  position: relative;
  z-index: 1;
  margin-top: 51px;
}
.roadmap-step.done .roadmap-step-dot { border-color: var(--accent); background: var(--accent); }
.roadmap-step.current .roadmap-step-dot {
  border-color: var(--accent);
  box-shadow: 0 0 0 6px var(--accent-glow);
}
.roadmap-step-date {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--fg-3);
  margin-top: 16px;
}
.roadmap-step h3 {
  font-size: 24px;
  font-weight: 500;
}
.roadmap-step p { color: var(--fg-3); font-size: 14px; }
.roadmap-milestone {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
  border: 1px solid var(--accent-line);
  padding: 3px 7px;
  border-radius: 3px;
}

/* ------- market ------- */
.market-wrap {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: stretch;
}
@media (max-width: 980px) { .market-wrap { grid-template-columns: 1fr; } }

.market-chart {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 40px 32px;
  background: var(--bg-2);
  position: relative;
  min-height: 460px;
  display: flex;
  flex-direction: column;
}
.market-axis {
  display: flex;
  justify-content: space-between;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--fg-4);
  margin-bottom: 20px;
}
.market-track {
  position: relative;
  flex: 1;
}
.market-rail {
  position: absolute;
  top: 50%;
  left: 0; right: 0;
  height: 2px;
  background: var(--line);
  transform: translateY(-50%);
}
.market-pin {
  position: absolute;
  top: 50%;
  transform: translate(-50%, -50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
  width: 160px;
}
.market-pin-dot {
  width: 14px; height: 14px;
  border-radius: 50%;
  background: var(--fg-3);
  border: 3px solid var(--bg-2);
  box-shadow: 0 0 0 1px var(--line-strong);
}
.market-pin-label {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--fg-3);
  text-align: center;
  line-height: 1.4;
}
.market-pin.kairos .market-pin-dot {
  background: var(--accent);
  width: 22px; height: 22px;
  box-shadow: 0 0 0 1px var(--accent), 0 0 30px var(--accent-glow);
}
.market-pin.kairos .market-pin-label {
  color: var(--accent);
  font-family: var(--font-display);
  font-size: 16px;
  letter-spacing: 0.16em;
  font-weight: 500;
}
.market-pin.above .market-pin-label { order: -1; }

.market-stats {
  display: flex;
  flex-direction: column;
  gap: 24px;
}
.market-stat {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 28px;
  background: var(--bg-2);
}
.market-stat-num {
  font-family: var(--font-display);
  font-size: 56px;
  font-weight: 400;
  color: var(--accent);
  letter-spacing: -0.03em;
  line-height: 1;
}
.market-stat-num small {
  font-size: 22px;
  color: var(--fg-2);
  margin-left: 4px;
  font-weight: 300;
}
.market-stat-label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--fg-3);
  margin-top: 12px;
}
.market-stat p {
  color: var(--fg-3);
  font-size: 14px;
  margin-top: 6px;
}

/* ------- partners ------- */
.partner-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
@media (max-width: 880px) { .partner-grid { grid-template-columns: 1fr; } }
.partner-card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 36px 32px;
  background: var(--bg-2);
  display: flex;
  flex-direction: column;
  gap: 18px;
  min-height: 260px;
}
.partner-card-mark {
  width: 40px; height: 40px;
  border: 1px solid var(--line-strong);
  border-radius: 8px;
  display: grid;
  place-items: center;
  color: var(--fg-2);
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 14px;
}
.partner-card h3 {
  font-size: 22px;
  font-weight: 500;
  margin-top: auto;
}
.partner-card p { color: var(--fg-3); font-size: 14px; }
.partner-card-role {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent);
}

/* ------- team ------- */
.team-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}
@media (max-width: 880px) { .team-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 480px) { .team-grid { grid-template-columns: 1fr; } }
.team-cell {
  padding: 32px 28px;
  border-right: 1px solid var(--line);
  display: flex;
  flex-direction: column;
  gap: 16px;
  min-height: 280px;
  background: var(--bg-2);
}
.team-cell:last-child { border-right: none; }
@media (max-width: 880px) {
  .team-cell:nth-child(2n) { border-right: none; }
  .team-cell:nth-child(odd) { border-right: 1px solid var(--line); }
  .team-cell:nth-child(-n+2) { border-bottom: 1px solid var(--line); }
}
.team-portrait {
  width: 72px;
  height: 72px;
  border-radius: 50%;
  background: var(--bg-3);
  border: 1px solid var(--line-strong);
  overflow: hidden;
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--bg) 88%, transparent);
}
.team-portrait-img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
}
.team-cell h3 {
  font-size: 19px;
  font-weight: 500;
}
.team-cell-role {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--fg-3);
}
.team-cell p { color: var(--fg-3); font-size: 13px; margin-top: auto; }

/* ------- footer / cta ------- */
.cta-section {
  background:
    radial-gradient(ellipse at center, var(--accent-glow), transparent 60%),
    var(--bg-2);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  text-align: center;
}
.cta-section .container { max-width: 880px; }
.cta-section h2 {
  font-size: clamp(36px, 5vw, 64px);
  font-weight: 400;
  margin-bottom: 24px;
}
.cta-section h2 em {
  font-style: normal;
  color: var(--accent);
  font-weight: 500;
}
.cta-section .lead { margin: 0 auto 40px; font-size: 19px; }
.cta-event {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  margin-top: 56px;
  padding: 20px 32px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  background: var(--bg);
}
.cta-event-tag {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent);
}
.cta-event-when {
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 500;
}
.cta-event-where {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--fg-3);
  letter-spacing: 0.06em;
}

footer {
  padding: 64px 0 40px;
  background: var(--bg);
}
.footer-inner {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr;
  gap: 48px;
  padding-bottom: 48px;
  border-bottom: 1px solid var(--line);
}
@media (max-width: 760px) { .footer-inner { grid-template-columns: 1fr; gap: 32px; } }
.footer-brand-name {
  font-family: var(--font-display);
  font-size: 22px;
  letter-spacing: 0.16em;
  font-weight: 500;
  margin-top: 12px;
}
.footer-inner svg.footer-mark {
  width: 22px !important;
  height: 22px !important;
  color: var(--fg);
  display: block;
  flex-shrink: 0;
}
.footer-tag {
  color: var(--fg-3);
  font-size: 14px;
  margin-top: 8px;
}
.footer-col h4 {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--fg-4);
  margin-bottom: 18px;
  font-weight: 500;
}
.footer-col ul { list-style: none; display: flex; flex-direction: column; gap: 10px; }
.footer-col a { color: var(--fg-2); font-size: 14px; transition: color 0.15s; }
.footer-col a:hover { color: var(--accent); }
.footer-meta {
  padding-top: 28px;
  display: flex;
  justify-content: space-between;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--fg-4);
  letter-spacing: 0.06em;
  flex-wrap: wrap;
  gap: 12px;
}

/* ------- entrance animations ------- */
.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}
.reveal.in { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  .roadmap-line-fill { animation: none; background-position: 0% 0; }
}