/* ==========================================================================
   KM Solutions — editorial stylesheet
   Two typefaces: serif display + system sans. Hairline rules, no cards.
   ========================================================================== */

/* --- Design tokens --- */
:root {
  --font-display: ui-serif, "New York", "Iowan Old Style", "Source Serif 4", Georgia, "Times New Roman", serif;
  --font-sans: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Inter", "Segoe UI", Roboto, Helvetica, Arial, sans-serif;

  --paper: #faf8f5;
  --paper-2: #f2eee9;
  --ink: #191410;
  --ink-2: #574d43;
  --ink-3: #94877b;
  --rule: rgba(25, 20, 16, 0.14);
  --rule-strong: rgba(25, 20, 16, 0.32);

  --accent: #c2410c;
  --accent-hover: #9a3412;
  --accent-soft: rgba(194, 65, 12, 0.08);

  --header-bg: rgba(250, 248, 245, 0.82);

  --container: 1180px;
  --gutter: clamp(1.25rem, 5vw, 4rem);
  --section-pad: clamp(4.5rem, 11vw, 9.5rem);
}

[data-theme="dark"] {
  --paper: #131110;
  --paper-2: #1c1917;
  --ink: #f4f0eb;
  --ink-2: #b9ada2;
  --ink-3: #8a7d71;
  --rule: rgba(244, 240, 235, 0.16);
  --rule-strong: rgba(244, 240, 235, 0.34);

  --accent: #f97316;
  --accent-hover: #fb923c;
  --accent-soft: rgba(249, 115, 22, 0.12);

  --header-bg: rgba(19, 17, 16, 0.82);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --paper: #131110;
    --paper-2: #1c1917;
    --ink: #f4f0eb;
    --ink-2: #b9ada2;
    --ink-3: #8a7d71;
    --rule: rgba(244, 240, 235, 0.16);
    --rule-strong: rgba(244, 240, 235, 0.34);

    --accent: #f97316;
    --accent-hover: #fb923c;
    --accent-soft: rgba(249, 115, 22, 0.12);

    --header-bg: rgba(19, 17, 16, 0.82);
  }
}

/* --- Base & reset --- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 1.0625rem;
  line-height: 1.65;
  letter-spacing: -0.011em;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

img {
  display: block;
  max-width: 100%;
  height: auto;
}

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

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

.skip-link {
  position: absolute;
  top: -100px;
  left: var(--gutter);
  z-index: 200;
  padding: 0.6rem 1rem;
  background: var(--ink);
  color: var(--paper);
  font-size: 0.875rem;
}

.skip-link:focus {
  top: 0.75rem;
}

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

.mono {
  font-family: ui-monospace, "SF Mono", Menlo, monospace;
  letter-spacing: 0.01em;
}

.meta {
  color: var(--ink-3);
  font-size: 0.92em;
}

.theme-light-only { display: block; }
.theme-dark-only  { display: none; }
[data-theme="dark"] .theme-light-only { display: none; }
[data-theme="dark"] .theme-dark-only  { display: block; }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .theme-light-only { display: none; }
  :root:not([data-theme="light"]) .theme-dark-only  { display: block; }
}

/* --- Header --- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--header-bg);
  -webkit-backdrop-filter: saturate(1.4) blur(14px);
  backdrop-filter: saturate(1.4) blur(14px);
  border-bottom: 1px solid var(--rule);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  height: 4.25rem;
}

.brand-logo-img {
  height: 1.9rem;
  width: auto;
}

.nav-desktop {
  display: none;
  gap: 2rem;
}

.nav-desktop a {
  position: relative;
  font-size: 0.8375rem;
  color: var(--ink-2);
  letter-spacing: 0.005em;
  padding-block: 0.35rem;
  transition: color 0.2s ease;
}

.nav-desktop a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 1px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.28s cubic-bezier(0.2, 0.7, 0.2, 1);
}

.nav-desktop a:hover,
.nav-desktop a.active {
  color: var(--ink);
}

.nav-desktop a:hover::after,
.nav-desktop a.active::after {
  transform: scaleX(1);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 1.25rem;
}

.btn-theme-toggle {
  display: grid;
  place-items: center;
  width: 2rem;
  height: 2rem;
  border: 0;
  background: none;
  color: var(--ink-2);
  cursor: pointer;
  transition: color 0.2s ease;
}

.btn-theme-toggle:hover { color: var(--accent); }

.btn-theme-toggle svg {
  width: 1.05rem;
  height: 1.05rem;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.6;
  stroke-linecap: round;
}

.header-cta {
  display: none;
  font-size: 0.8375rem;
  color: var(--ink);
  border-bottom: 1px solid var(--rule-strong);
  padding-bottom: 0.15rem;
  transition: color 0.2s ease, border-color 0.2s ease;
}

.header-cta:hover {
  color: var(--accent);
  border-color: var(--accent);
}

.mobile-menu-toggle {
  display: grid;
  place-items: center;
  width: 2.15rem;
  height: 2.15rem;
  border: 0;
  background: none;
  color: var(--ink);
  cursor: pointer;
}

.mobile-menu-toggle svg {
  width: 1.35rem;
  height: 1.35rem;
}

.mobile-drawer {
  display: none;
  flex-direction: column;
  gap: 0.25rem;
  padding: 0.5rem var(--gutter) 1.75rem;
  border-top: 1px solid var(--rule);
  background: var(--paper);
}

.mobile-drawer.open { display: flex; }

.mobile-drawer a {
  padding: 0.75rem 0;
  border-bottom: 1px solid var(--rule);
  font-family: var(--font-display);
  font-size: 1.55rem;
  letter-spacing: -0.02em;
  line-height: 1.15;
}

.drawer-foot {
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
  padding-top: 1.15rem;
}

.drawer-foot a {
  border: 0;
  padding: 0;
  font-family: var(--font-sans);
  font-size: 0.9375rem;
  color: var(--ink-2);
}

/* --- Link with arrow (the site's main button) --- */
.link-arrow {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  padding: 0;
  border: 0;
  background: none;
  font-family: var(--font-sans);
  font-size: 0.9875rem;
  color: var(--ink);
  cursor: pointer;
  transition: color 0.2s ease;
}

.link-arrow::after {
  content: "→";
  color: var(--accent);
  transition: transform 0.28s cubic-bezier(0.2, 0.7, 0.2, 1);
}

.link-arrow:hover {
  color: var(--accent);
}

.link-arrow:hover::after {
  transform: translateX(5px);
}

/* --- Hero --- */
.hero {
  padding-top: clamp(3.25rem, 9vw, 7rem);
  padding-bottom: clamp(2.5rem, 6vw, 4.5rem);
}

.hero-eyebrow {
  font-size: 0.8125rem;
  letter-spacing: 0.13em;
  text-transform: uppercase;
  color: var(--ink-3);
  margin-bottom: clamp(1.75rem, 4vw, 3rem);
  animation: rise 0.9s cubic-bezier(0.2, 0.7, 0.2, 1) both;
}

.hero-title {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: clamp(2.65rem, 8.2vw, 6.25rem);
  line-height: 1.02;
  letter-spacing: -0.035em;
  animation: rise 0.9s cubic-bezier(0.2, 0.7, 0.2, 1) 0.08s both;
}

.hero-brand {
  display: block;
  color: var(--accent);
  margin-bottom: 0.12em;
}

.hero-claim em {
  font-style: italic;
  color: var(--ink-2);
}

.hero-lower {
  display: flex;
  flex-direction: column;
  gap: 1.75rem;
  margin-top: clamp(2rem, 5vw, 3.25rem);
  animation: rise 0.9s cubic-bezier(0.2, 0.7, 0.2, 1) 0.18s both;
}

.hero-sub {
  max-width: 34rem;
  font-size: 1.125rem;
  line-height: 1.6;
  color: var(--ink-2);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem 2.5rem;
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.75rem 1.5rem;
  margin-top: clamp(3.25rem, 7vw, 5.5rem);
  padding-top: 1.75rem;
  border-top: 1px solid var(--rule-strong);
  animation: rise 0.9s cubic-bezier(0.2, 0.7, 0.2, 1) 0.28s both;
}

.stat dt {
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 3.4vw, 2.5rem);
  font-weight: 500;
  letter-spacing: -0.03em;
  line-height: 1.1;
}

.stat dd {
  margin-top: 0.35rem;
  font-size: 0.8375rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--ink-3);
}

@keyframes rise {
  from { opacity: 0; transform: translateY(22px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* --- Statement --- */
.statement {
  padding-block: var(--section-pad);
  border-top: 1px solid var(--rule);
  background: var(--paper-2);
}

.statement-quote {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: clamp(1.95rem, 4.6vw, 3.65rem);
  line-height: 1.14;
  letter-spacing: -0.03em;
  max-width: 21ch;
}

.statement-quote em {
  font-style: italic;
  color: var(--accent);
}

.statement-note {
  margin-top: 1.75rem;
  max-width: 36rem;
  color: var(--ink-2);
}

/* --- Sections (shared) --- */
.section {
  padding-block: var(--section-pad);
  border-top: 1px solid var(--rule);
}

.section-head {
  margin-bottom: clamp(2.75rem, 6vw, 4.5rem);
}

.section-label {
  font-size: 0.8125rem;
  letter-spacing: 0.13em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1.35rem;
}

.section-title {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: clamp(2.15rem, 5.2vw, 3.95rem);
  line-height: 1.06;
  letter-spacing: -0.032em;
}

.section-lede {
  margin-top: 1.65rem;
  max-width: 40rem;
  font-size: 1.125rem;
  color: var(--ink-2);
}

/* --- Rows (the workhorse: capabilities, approach, team, stack, docs) --- */
.rows {
  display: flex;
  flex-direction: column;
}

.row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.55rem;
  padding-block: clamp(1.85rem, 4vw, 2.75rem);
  border-top: 1px solid var(--rule);
}

.row:last-child { border-bottom: 1px solid var(--rule); }

.row-num {
  font-family: var(--font-display);
  font-size: 1.125rem;
  color: var(--accent);
  letter-spacing: -0.01em;
}

.row-title {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: clamp(1.55rem, 3vw, 2.15rem);
  line-height: 1.15;
  letter-spacing: -0.025em;
}

.row-body {
  max-width: 38rem;
  color: var(--ink-2);
}

.row-meta {
  font-size: 0.8625rem;
  letter-spacing: 0.03em;
  color: var(--ink-3);
}

/* Approach: compact rows */
.rows-compact .row {
  grid-template-columns: 3.25rem 1fr;
  align-items: baseline;
  column-gap: 1.25rem;
  row-gap: 0.35rem;
  padding-block: clamp(1.25rem, 2.6vw, 1.75rem);
}

.rows-compact .row-title {
  font-size: clamp(1.35rem, 2.4vw, 1.75rem);
}

.rows-compact .row-body {
  grid-column: 2;
  margin: 0;
}

/* Stack: definition rows */
.rows-stack .row {
  grid-template-columns: 1fr;
  padding-block: clamp(1.15rem, 2.4vw, 1.65rem);
}

/* Documents */
.rows-docs .row {
  grid-template-columns: 1fr;
  padding-block: clamp(1.55rem, 3.2vw, 2.25rem);
}

.row-doc .link-arrow {
  margin-top: 0.35rem;
  justify-self: start;
}

/* --- Case study --- */
.section-work {
  background: var(--paper-2);
}

.work-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.75rem 1.5rem;
  padding-top: 1.75rem;
  border-top: 1px solid var(--rule-strong);
  margin-bottom: clamp(3rem, 7vw, 5rem);
}

.work-story {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2.5rem;
  margin-bottom: clamp(3.5rem, 8vw, 6rem);
}

.story-block h3 {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 1.35rem;
  letter-spacing: -0.02em;
  margin-bottom: 0.75rem;
}

.story-block h3::before {
  content: "";
  display: block;
  width: 2.25rem;
  height: 2px;
  background: var(--accent);
  margin-bottom: 1.15rem;
}

.story-block p {
  color: var(--ink-2);
  max-width: 34rem;
}

/* Pipeline (interactive stages) */
.pipeline-label {
  font-size: 0.8125rem;
  letter-spacing: 0.13em;
  text-transform: uppercase;
  color: var(--ink-3);
  margin-bottom: 1.25rem;
}

.pipeline-steps {
  border-top: 1px solid var(--rule-strong);
}

.arch-step-node {
  display: grid;
  grid-template-columns: 3.25rem 1fr;
  column-gap: 1.25rem;
  row-gap: 0.35rem;
  padding-block: clamp(1.35rem, 3vw, 1.9rem);
  border-bottom: 1px solid var(--rule);
  cursor: pointer;
  transition: background 0.25s ease;
}

.arch-step-node:hover {
  background: var(--accent-soft);
}

.stage-num {
  font-family: var(--font-display);
  font-size: 1.125rem;
  color: var(--ink-3);
  transition: color 0.25s ease;
}

.arch-step-node.active .stage-num {
  color: var(--accent);
}

.stage-title {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: clamp(1.35rem, 2.4vw, 1.85rem);
  letter-spacing: -0.022em;
  line-height: 1.2;
}

.stage-tech {
  grid-column: 2;
  font-size: 0.7875rem;
  letter-spacing: 0.11em;
  text-transform: uppercase;
  color: var(--ink-3);
}

.arch-step-detail {
  grid-column: 2;
  max-width: 40rem;
  color: var(--ink-2);
  overflow: hidden;
  max-height: 0;
  opacity: 0;
  transition: max-height 0.4s cubic-bezier(0.2, 0.7, 0.2, 1),
              opacity 0.35s ease,
              margin-top 0.35s ease;
}

.arch-step-node.active .arch-step-detail {
  max-height: 12rem;
  opacity: 1;
  margin-top: 0.65rem;
}

/* --- Controls line --- */
.controls-line {
  margin-top: clamp(2.5rem, 5vw, 3.75rem);
  padding-top: 1.75rem;
  border-top: 1px solid var(--rule);
  font-size: 0.9375rem;
  line-height: 2;
  color: var(--ink-3);
  max-width: 52rem;
}

/* --- Team --- */
.row-person .row-title {
  font-size: clamp(1.85rem, 3.6vw, 2.55rem);
}

.row-person .row-meta {
  letter-spacing: 0.06em;
  text-transform: uppercase;
  font-size: 0.8125rem;
  color: var(--accent);
}

/* --- Contact --- */
.section-contact {
  background: var(--paper-2);
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(3rem, 7vw, 5.5rem);
}

.corp-list {
  border-top: 1px solid var(--rule-strong);
}

.corp-row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.35rem;
  padding-block: 1.15rem;
  border-bottom: 1px solid var(--rule);
}

.corp-row dt {
  font-size: 0.8125rem;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  color: var(--ink-3);
}

.corp-row dd {
  color: var(--ink);
}

.corp-row dd.mono {
  color: var(--accent);
  font-size: 1.15rem;
}

.corp-row a {
  border-bottom: 1px solid var(--rule-strong);
  transition: color 0.2s ease, border-color 0.2s ease;
}

.corp-row a:hover {
  color: var(--accent);
  border-color: var(--accent);
}

.contact-info .btn-copy-info {
  margin-top: 1.75rem;
}

/* Form */
.form-lead {
  font-family: var(--font-display);
  font-size: 1.45rem;
  letter-spacing: -0.02em;
  margin-bottom: 2.25rem;
}

.form-group {
  margin-bottom: 1.85rem;
}

.form-group label {
  display: block;
  font-size: 0.8125rem;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  color: var(--ink-3);
  margin-bottom: 0.55rem;
}

.form-control {
  width: 100%;
  padding: 0.55rem 0 0.75rem;
  border: 0;
  border-bottom: 1px solid var(--rule-strong);
  border-radius: 0;
  background: transparent;
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 1.0625rem;
  letter-spacing: -0.01em;
  transition: border-color 0.25s ease;
  appearance: none;
}

.form-control::placeholder {
  color: var(--ink-3);
}

.form-control:focus {
  outline: none;
  border-color: var(--accent);
}

textarea.form-control {
  resize: vertical;
  min-height: 6.5rem;
  line-height: 1.6;
}

select.form-control {
  cursor: pointer;
  background-image: linear-gradient(45deg, transparent 50%, var(--ink-3) 50%),
                    linear-gradient(135deg, var(--ink-3) 50%, transparent 50%);
  background-position: calc(100% - 12px) 55%, calc(100% - 7px) 55%;
  background-size: 5px 5px, 5px 5px;
  background-repeat: no-repeat;
}

.btn-submit {
  margin-top: 0.5rem;
  padding: 1rem 2.15rem;
  border: 0;
  border-radius: 2px;
  background: var(--accent);
  color: var(--paper);
  font-family: var(--font-sans);
  font-size: 0.9375rem;
  letter-spacing: 0.03em;
  cursor: pointer;
  transition: background 0.25s ease;
}

[data-theme="dark"] .btn-submit { color: #1a120b; }

.btn-submit:hover {
  background: var(--accent-hover);
}

/* --- Footer --- */
.site-footer {
  border-top: 1px solid var(--rule);
  padding-block: 2.75rem;
}

.footer-inner {
  display: flex;
  flex-direction: column;
  gap: 1.35rem;
}

.footer-copy {
  font-size: 0.8625rem;
  color: var(--ink-3);
}

.footer-nav {
  display: flex;
  gap: 1.75rem;
}

.footer-nav a {
  font-size: 0.8625rem;
  color: var(--ink-2);
  transition: color 0.2s ease;
}

.footer-nav a:hover { color: var(--accent); }

/* --- Toast --- */
.toast-notification {
  position: fixed;
  left: 50%;
  bottom: 2rem;
  z-index: 300;
  transform: translate(-50%, 1.25rem);
  padding: 0.85rem 1.5rem;
  background: var(--ink);
  color: var(--paper);
  font-size: 0.875rem;
  border-radius: 2px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease, transform 0.3s ease;
}

.toast-notification.show {
  opacity: 1;
  transform: translate(-50%, 0);
}

/* --- Scroll reveal --- */
.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.75s cubic-bezier(0.2, 0.7, 0.2, 1),
              transform 0.75s cubic-bezier(0.2, 0.7, 0.2, 1);
  transition-delay: var(--d, 0s);
}

.reveal.in {
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  .reveal { opacity: 1; transform: none; }
}

/* ==========================================================================
   Responsive
   ========================================================================== */
@media (min-width: 640px) {
  .hero-stats {
    grid-template-columns: repeat(4, 1fr);
  }

  .hero-lower {
    flex-direction: row;
    align-items: flex-end;
    justify-content: space-between;
    gap: 3rem;
  }

  .corp-row {
    grid-template-columns: 12.5rem 1fr;
    gap: 1.5rem;
  }
}

@media (min-width: 768px) {
  .nav-desktop { display: flex; }
  .header-cta { display: inline-block; }
  .mobile-menu-toggle { display: none; }
  .mobile-drawer { display: none !important; }

  .row {
    grid-template-columns: 4.5rem 20rem 1fr;
    column-gap: 2.5rem;
    align-items: baseline;
  }

  .row-body { margin: 0; }
  .row-meta { grid-column: 3; }

  .rows-compact .row {
    grid-template-columns: 4.5rem 12rem 1fr;
  }

  .rows-compact .row-body {
    grid-column: 3;
  }

  .rows-stack .row {
    grid-template-columns: 14rem 1fr;
    column-gap: 2.5rem;
    align-items: baseline;
  }

  .rows-docs .row {
    grid-template-columns: 21rem 1fr 6rem;
    column-gap: 2.5rem;
    align-items: baseline;
  }

  .row-doc .link-arrow {
    grid-column: 3;
    justify-self: end;
    margin-top: 0;
  }

  .work-story {
    grid-template-columns: repeat(3, 1fr);
    gap: 3rem;
  }

  .arch-step-node {
    grid-template-columns: 4.5rem 1fr 13rem;
    column-gap: 2.5rem;
    align-items: baseline;
  }

  .stage-tech {
    grid-column: 3;
    grid-row: 1;
    justify-self: end;
    text-align: right;
  }

  .arch-step-detail {
    grid-column: 2;
  }

  .contact-grid {
    grid-template-columns: 1fr 1.1fr;
    align-items: start;
  }

  .footer-inner {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
  }
}

@media (min-width: 1024px) {
  .row-person {
    grid-template-columns: 4.5rem 22rem 1fr;
  }

  .row-person .row-title {
    grid-column: 2;
  }

  .row-person .row-meta {
    grid-column: 2;
  }

  .row-person .row-body {
    grid-column: 3;
    grid-row: 1 / span 3;
  }
}

/* ==========================================================================
   Print
   ========================================================================== */
@media print {
  .site-header, .btn-theme-toggle, .mobile-drawer, .toast-notification,
  .rfp-form, .btn-copy-info, .pipeline { display: none !important; }

  body {
    background: #fff;
    color: #000;
    font-size: 11pt;
  }

  .section, .statement, .hero {
    padding-block: 1.5rem;
    border-top: 0.5pt solid #999;
  }

  .reveal { opacity: 1 !important; transform: none !important; }
}