/* Kalmanon — light research desk trial */

:root {
  --k-bg: #fafbfc;
  --k-ink: #0a1016;
  --k-muted: #3f505f;
  --k-faint: #5a6b7a;
  --k-line: rgba(10, 16, 22, 0.14);
  --k-line-soft: rgba(10, 16, 22, 0.09);
  --k-accent: #096b5c;
  --k-accent-2: #1a5478;
  --k-warm: #6b583c;
  --k-panel: #e8ecf0;
  --k-font-display: "Syne", sans-serif;
  --k-font-serif: "Instrument Serif", Georgia, serif;
  --k-font-body: "Sora", sans-serif;
  --k-font-mono: "IBM Plex Mono", ui-monospace, monospace;
  --k-ease: cubic-bezier(0.22, 1, 0.36, 1);
  --k-gutter: clamp(1.5rem, 4.5vw, 3.25rem);
  --k-shell: min(1120px, calc(100% - (var(--k-gutter) * 2)));
  --k-rail: 10rem;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 5.25rem;
}

body.k-body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--k-font-body);
  font-weight: 400;
  color: var(--k-ink);
  background: var(--k-bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

::selection {
  background: rgba(11, 125, 108, 0.18);
  color: var(--k-ink);
}

.k-visually-hidden {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0, 0, 0, 0);
  white-space: nowrap; border: 0;
}

.k-noise {
  pointer-events: none;
  position: fixed; inset: 0; z-index: 0;
  opacity: 0.035;
  mix-blend-mode: multiply;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

.k-field {
  pointer-events: none;
  position: fixed; inset: 0; z-index: 0;
  background:
    radial-gradient(55% 36% at 8% 0%, rgba(9, 107, 92, 0.05), transparent 58%),
    radial-gradient(40% 28% at 96% 4%, rgba(26, 84, 120, 0.04), transparent 52%),
    linear-gradient(180deg, #fcfdfe 0%, #f7f8fa 45%, #f3f5f7 100%);
}

.k-grid {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(14, 20, 26, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(14, 20, 26, 0.035) 1px, transparent 1px);
  background-size: 108px 108px;
  mask-image: radial-gradient(ellipse 48% 38% at 38% 16%, #000 0%, transparent 70%);
  opacity: 0.55;
}

.k-scan {
  position: absolute; left: 0; right: 0; height: 10%; top: -12%;
  background: linear-gradient(180deg, transparent, rgba(11, 125, 108, 0.04), transparent);
  animation: k-scan 26s linear infinite;
}
@keyframes k-scan { to { transform: translateY(780%); } }

.k-shell {
  width: var(--k-shell);
  margin-inline: auto;
}

.k-nav,
.k-hero,
.k-section,
.k-footer,
.k-legal {
  position: relative;
  z-index: 1;
}

/* Nav */
.k-nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 40;
  display: flex; align-items: center; justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.75rem 1.5rem;
  padding: 1.05rem var(--k-gutter);
  border-bottom: 1px solid transparent;
  transition: background 0.3s var(--k-ease), border-color 0.3s var(--k-ease), backdrop-filter 0.3s var(--k-ease);
}
.k-nav.is-solid,
.k-nav.is-open {
  border-bottom-color: var(--k-line-soft);
  background: rgba(252, 253, 254, 0.9);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
}
@media (min-width: 960px) {
  .k-nav {
    padding-left: max(var(--k-gutter), calc((100% - 1120px) / 2));
    padding-right: max(var(--k-gutter), calc((100% - 1120px) / 2));
  }
}

.k-wordmark {
  display: inline-flex;
  text-decoration: none;
  color: var(--k-ink);
  flex-shrink: 0;
  font-family: var(--k-font-display);
  font-weight: 600;
  font-size: 0.7rem;
  letter-spacing: 0.34em;
  position: relative;
  z-index: 2;
}
.k-wordmark:focus-visible {
  outline: 1px solid var(--k-accent);
  outline-offset: 4px;
}

.k-nav-toggle {
  display: inline-flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 2.4rem;
  height: 2.4rem;
  margin: 0;
  padding: 0;
  border: 0;
  background: transparent;
  color: var(--k-ink);
  cursor: pointer;
  position: relative;
  z-index: 2;
}
.k-nav-toggle:focus-visible {
  outline: 1px solid var(--k-accent);
  outline-offset: 2px;
}
.k-nav-toggle span {
  display: block;
  width: 1.1rem;
  height: 1px;
  margin-inline: auto;
  background: currentColor;
  transition: transform 0.25s var(--k-ease);
}
.k-nav.is-open .k-nav-toggle span:first-child {
  transform: translateY(3px) rotate(45deg);
}
.k-nav.is-open .k-nav-toggle span:last-child {
  transform: translateY(-3px) rotate(-45deg);
}
@media (min-width: 900px) {
  .k-nav-toggle { display: none; }
}

.k-nav-links {
  display: none;
  width: 100%;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.95rem;
  padding: 0.5rem 0 0.65rem;
  font-family: var(--k-font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.05em;
}
.k-nav.is-open .k-nav-links { display: flex; }
@media (min-width: 900px) {
  .k-nav-links {
    display: flex;
    width: auto;
    flex-direction: row;
    align-items: center;
    gap: 0 1.5rem;
    padding: 0;
    font-size: 0.64rem;
  }
}
.k-nav-links a {
  color: var(--k-faint);
  text-decoration: none;
  white-space: nowrap;
  transition: color 0.2s var(--k-ease);
}
.k-nav-links a:focus-visible {
  outline: 1px solid var(--k-accent);
  outline-offset: 3px;
}
.k-nav-links a span {
  margin-right: 0.4rem;
  opacity: 0.65;
}
.k-nav-links a:hover,
.k-nav-links a.is-active { color: var(--k-ink); }
.k-nav-links a:hover span,
.k-nav-links a.is-active span { color: var(--k-accent); opacity: 1; }

/* Hero — centered pair, not edge-stretched */
.k-hero {
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 7.5rem 0 4.5rem;
}

.k-hero-grid {
  display: grid;
  gap: 2.75rem;
  width: min(100%, 52rem);
  margin-inline: auto;
  align-items: center;
  justify-items: stretch;
}
@media (min-width: 900px) {
  .k-hero-grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(17.5rem, 20.5rem);
    gap: 3.25rem;
    align-items: end;
    width: min(100%, 54rem);
  }
}

.k-kicker {
  margin: 0 0 1.35rem;
  font-family: var(--k-font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--k-warm);
}

.k-logo {
  margin: 0 0 1.85rem;
  line-height: 0.9;
}
.k-logo-line {
  display: block;
  font-family: var(--k-font-display);
  font-weight: 700;
  font-size: clamp(2.2rem, 7.2vw, 4.4rem);
  letter-spacing: 0.07em;
  color: var(--k-ink);
  white-space: nowrap;
}

.k-hero-line {
  margin: 0;
  max-width: 12ch;
  font-family: var(--k-font-display);
  font-weight: 500;
  font-size: clamp(1.45rem, 2.8vw, 1.9rem);
  line-height: 1.18;
  letter-spacing: -0.025em;
  color: #1a2430;
}
.k-hero-line em {
  font-family: var(--k-font-serif);
  font-style: italic;
  font-weight: 400;
  color: #3a4a58;
}

.k-hero-aside {
  margin: 1.75rem 0 0;
  padding-top: 1.15rem;
  border-top: 1px solid var(--k-line-soft);
  max-width: 22rem;
  font-family: var(--k-font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.1em;
  color: var(--k-faint);
}

.k-sys {
  border: 1px solid var(--k-line);
  background: var(--k-panel);
  box-shadow: 0 10px 36px rgba(10, 16, 22, 0.06);
}
.k-sys-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  padding: 0.9rem 1.2rem;
  border-bottom: 1px solid var(--k-line-soft);
  font-family: var(--k-font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--k-accent);
  background: rgba(255, 255, 255, 0.45);
}
.k-sys-live {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  color: var(--k-faint);
  letter-spacing: 0.12em;
}
.k-sys-live i {
  width: 0.35rem; height: 0.35rem;
  border-radius: 50%;
  background: var(--k-accent);
  box-shadow: 0 0 0 3px rgba(11, 125, 108, 0.12);
  animation: k-pulse 3s ease-in-out infinite;
}
@keyframes k-pulse {
  0%, 100% { opacity: 0.4; }
  50% { opacity: 1; }
}

.k-sys-table {
  width: 100%;
  border-collapse: collapse;
  font-family: var(--k-font-mono);
  font-size: 0.76rem;
}
.k-sys-table th,
.k-sys-table td {
  padding: 0.85rem 1.2rem;
  border-bottom: 1px solid var(--k-line-soft);
  font-weight: 400;
}
.k-sys-table th {
  color: var(--k-muted);
  letter-spacing: 0.07em;
  text-transform: uppercase;
  font-size: 0.66rem;
  text-align: left;
  width: 58%;
}
.k-sys-table td {
  color: var(--k-ink);
  text-align: right;
  letter-spacing: 0.1em;
}

.k-flow {
  list-style: none;
  margin: 0;
  padding: 1rem 1.2rem 1.15rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem 0.55rem;
  font-family: var(--k-font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.07em;
  color: var(--k-ink);
  background: #eef1f4;
  border-top: 1px solid var(--k-line-soft);
}
.k-flow li:not(:last-child)::after {
  content: "→";
  margin-left: 0.55rem;
  color: var(--k-faint);
}

/* Sections */
.k-section {
  padding: 5rem 0;
  border-top: 1px solid var(--k-line-soft);
}
.k-section--last { padding-bottom: 6.5rem; }

.k-section-grid {
  display: grid;
  gap: 1.75rem 3.5rem;
}
@media (min-width: 860px) {
  .k-section-grid {
    grid-template-columns: var(--k-rail) minmax(0, 1fr);
    gap: 2.5rem 4.5rem;
    align-items: start;
  }
}

.k-section-rail {
  display: flex;
  flex-direction: column;
  gap: 0.7rem;
  padding-top: 0.4rem;
}
@media (min-width: 860px) {
  .k-section-rail {
    position: sticky;
    top: 5.75rem;
    padding-right: 1.25rem;
    border-right: 1px solid var(--k-line-soft);
    min-height: 4.5rem;
  }
}

.k-index {
  font-family: var(--k-font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.22em;
  color: var(--k-faint);
}

.k-chapter {
  font-family: var(--k-font-mono);
  font-size: 0.66rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--k-accent);
  line-height: 1.45;
}

.k-section-body {
  max-width: 34rem;
  display: grid;
  gap: 1.5rem;
  padding-top: 0.15rem;
}
.k-section-body--wide { max-width: 46rem; }

.k-statement {
  margin: 0;
  font-family: var(--k-font-display);
  font-weight: 600;
  font-size: clamp(1.65rem, 3.4vw, 2.35rem);
  line-height: 1.16;
  letter-spacing: -0.03em;
}

.k-support {
  margin: 0;
  font-size: 1rem;
  line-height: 1.72;
  color: var(--k-muted);
  max-width: 30rem;
}

.k-split {
  display: grid;
  gap: 2.5rem;
  margin-top: 0.35rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--k-line);
}
@media (min-width: 760px) {
  .k-split {
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
  }
}

.k-meta {
  margin: 0.35rem 0 0;
  padding: 1.15rem 0 0;
  border-top: 1px solid var(--k-line-soft);
  display: grid;
  gap: 0;
  font-family: var(--k-font-mono);
  font-size: 0.7rem;
}
.k-meta dt {
  margin: 0 0 0.5rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--k-faint);
}
.k-meta dd {
  margin: 0;
  color: var(--k-muted);
  letter-spacing: 0.03em;
  padding: 0.45rem 0;
  border-bottom: 1px solid var(--k-line-soft);
}
.k-meta dd:last-child { border-bottom: 0; }
@media (min-width: 540px) {
  .k-meta { grid-template-columns: 1fr 1fr; }
  .k-meta dt { grid-column: 1 / -1; }
}

.k-rows {
  list-style: none;
  margin: 0.15rem 0 0;
  padding: 0;
  border-top: 1px solid var(--k-line);
}
.k-rows li {
  display: grid;
  gap: 0.25rem;
  padding: 1.2rem 0;
  border-bottom: 1px solid var(--k-line-soft);
  transition: border-color 0.25s var(--k-ease);
}
.k-rows li:hover { border-bottom-color: rgba(9, 107, 92, 0.45); }
@media (min-width: 540px) {
  .k-rows li {
    grid-template-columns: 10rem 1fr;
    gap: 1.5rem;
    align-items: baseline;
  }
}
.k-rows-name {
  font-family: var(--k-font-display);
  font-weight: 600;
  font-size: 1.05rem;
  letter-spacing: -0.015em;
}
.k-rows-note {
  font-size: 0.92rem;
  color: var(--k-muted);
}

.k-math,
.k-risk-block {
  font-family: var(--k-font-mono);
}
.k-math-label {
  margin: 0 0 0.8rem;
  font-size: 0.62rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--k-accent-2);
}
.k-math-eq {
  margin: 0 0 1.1rem;
  font-size: clamp(1.15rem, 2.2vw, 1.4rem);
  letter-spacing: 0.02em;
  color: var(--k-ink);
}
.k-math-rule {
  height: 1px;
  background: var(--k-line-soft);
  margin: 0 0 1rem;
}
.k-math-sub {
  margin: 0 0 0.6rem;
  font-size: 0.62rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--k-faint);
}
.k-math-list {
  margin: 0;
  padding: 0;
  list-style: none;
  color: var(--k-muted);
  font-size: 0.86rem;
  line-height: 1.85;
}
.k-math-list li::before {
  content: "— ";
  color: var(--k-faint);
}
.k-risk-block .k-support {
  font-family: var(--k-font-body);
  margin-bottom: 0.65rem;
}
.k-risk-block .k-meta {
  border-top: 0;
  padding-top: 0.2rem;
}

.k-principles {
  list-style: none;
  margin: 0;
  padding: 0;
}
.k-principles li {
  font-family: var(--k-font-serif);
  font-style: italic;
  font-size: clamp(2.35rem, 5.8vw, 3.75rem);
  line-height: 1.04;
  padding: 0.55rem 0 0.8rem;
  border-bottom: 1px solid var(--k-line-soft);
  color: var(--k-ink);
}

[data-reveal] {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 0.75s var(--k-ease), transform 0.75s var(--k-ease);
}
[data-reveal].is-in {
  opacity: 1;
  transform: none;
}

.k-footer {
  border-top: 1px solid var(--k-line-soft);
  padding: 1.6rem 0 2.25rem;
  font-family: var(--k-font-mono);
  font-size: 0.66rem;
  letter-spacing: 0.1em;
  color: var(--k-faint);
}
.k-footer-inner {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
}
.k-footer p { margin: 0; }
.k-footer a {
  color: var(--k-muted);
  text-decoration: none;
}
.k-footer a:hover { color: var(--k-ink); }
.k-footer a:focus-visible {
  outline: 1px solid var(--k-accent);
  outline-offset: 3px;
}

.k-legal {
  width: var(--k-shell);
  margin: 0 auto;
  padding: 8rem 0 5.5rem;
  max-width: 36rem;
}
.k-legal .k-chapter {
  display: block;
  margin-bottom: 0.8rem;
}
.k-legal h1 {
  margin: 0 0 1.85rem;
  font-family: var(--k-font-display);
  font-weight: 600;
  font-size: clamp(1.7rem, 3.8vw, 2.25rem);
  letter-spacing: -0.02em;
}
.k-legal-body {
  display: grid;
  gap: 1.15rem;
  font-size: 0.96rem;
  line-height: 1.75;
  color: var(--k-muted);
}

@media (prefers-reduced-motion: reduce) {
  .k-scan, .k-sys-live i { animation: none !important; }
  [data-reveal] {
    opacity: 1;
    transform: none;
    transition: none;
  }
  html { scroll-behavior: auto; }
}