/* SK AutoSphere Guide — design-system stylesheet */
/* Hand-authored. No Tailwind. No kmt-* classes. */

:root {
  --skg-ink: #0B1F2D;
  --skg-ink-2: #334155;
  --skg-muted: #64748B;
  --skg-line: #E2E8F0;
  --skg-surface: #FFFFFF;
  --skg-bg: #F6F8FA;

  --skg-amber: #F5A524;
  --skg-amber-ink: #0B1F2D;
  --skg-amber-soft: #FEF3E2;

  --skg-market: #2563EB;
  --skg-market-ink: #FFFFFF;

  --skg-ok: #16A34A;
  --skg-warn: #D97706;
  --skg-stop: #DC2626;

  --skg-font-arch: 'Archivo', system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
  --skg-font-inter: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
  --skg-font-mono: 'IBM Plex Mono', ui-monospace, SFMono-Regular, monospace;

  --skg-radius: 8px;
  --skg-radius-lg: 12px;
  --skg-gutter: 24px;
  --skg-max: 1200px;
  --skg-header-h: 72px;

  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root {
    --skg-bg: #0B1F2D;
    --skg-surface: #12293A;
    --skg-ink: #F1F5F9;
    --skg-ink-2: #CBD5E1;
    --skg-muted: #94A3B8;
    --skg-line: #22384A;
    color-scheme: dark;
  }
}

[data-skg-theme="dark"] {
  --skg-bg: #0B1F2D;
  --skg-surface: #12293A;
  --skg-ink: #F1F5F9;
  --skg-ink-2: #CBD5E1;
  --skg-muted: #94A3B8;
  --skg-line: #22384A;
  color-scheme: dark;
}

[data-skg-theme="light"] {
  --skg-bg: #F6F8FA;
  --skg-surface: #FFFFFF;
  --skg-ink: #0B1F2D;
  --skg-ink-2: #334155;
  --skg-muted: #64748B;
  --skg-line: #E2E8F0;
  color-scheme: light;
}

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

html { scroll-behavior: smooth; }
html { scroll-padding-top: 84px; }

body {
  margin: 0;
  background: var(--skg-bg);
  color: var(--skg-ink);
  font: 400 1rem/1.65 var(--skg-font-inter);
  -webkit-font-smoothing: antialiased;
}

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

a { color: var(--skg-market); }
a:hover { text-decoration: none; }

:focus-visible {
  outline: 2px solid var(--skg-amber);
  outline-offset: 2px;
}

button, input, select, textarea {
  font: inherit;
  color: inherit;
}

/* Type */
.skg-overline {
  display: block;
  font: 600 0.75rem/1 var(--skg-font-inter);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--skg-amber);
  margin-bottom: 12px;
}

.skg-display {
  font: 800 3.25rem/1.05 var(--skg-font-arch);
  letter-spacing: -0.01em;
  margin: 0 0 24px;
}

.skg-h2 {
  font: 700 2rem/1.15 var(--skg-font-arch);
  margin: 0 0 16px;
}

.skg-h3 {
  font: 600 1.375rem/1.25 var(--skg-font-arch);
  margin: 0 0 12px;
}

.skg-h4 {
  font: 600 1.0625rem/1.35 var(--skg-font-arch);
  margin: 0 0 8px;
}

.skg-body { font: 400 1rem/1.65 var(--skg-font-inter); }
.skg-small { font: 400 0.875rem/1.5 var(--skg-font-inter); }
.skg-mono { font: 400 0.9375rem/1.4 var(--skg-font-mono); }

.skg-text-muted { color: var(--skg-muted); }
.skg-text-ink2 { color: var(--skg-ink-2); }

@media (max-width: 767px) {
  .skg-display { font-size: 2.25rem; }
  .skg-h2 { font-size: 1.625rem; }
}

/* Layout */
.skg-container {
  width: 100%;
  max-width: var(--skg-max);
  margin: 0 auto;
  padding-left: var(--skg-gutter);
  padding-right: var(--skg-gutter);
}

.skg-section { padding: 64px 0; }
@media (max-width: 767px) { .skg-section { padding: 48px 0; } }

.skg-split {
  display: grid;
  grid-template-columns: 1fr 360px;
  gap: 48px;
  align-items: start;
}

@media (max-width: 1023px) {
  .skg-split { grid-template-columns: 1fr; }
}

.skg-sticky { position: sticky; top: 96px; }

/* Buttons */
.skg-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 44px;
  padding: 0 20px;
  border: 0;
  border-radius: var(--skg-radius);
  background: var(--skg-amber);
  color: var(--skg-amber-ink);
  font: 600 0.9375rem var(--skg-font-inter);
  text-decoration: none;
  cursor: pointer;
  transition: transform .15s ease-out, box-shadow .15s ease-out, background .15s ease-out;
}

.skg-btn:hover { transform: translateY(-2px); box-shadow: 0 4px 0 rgba(245,165,36,.25); }
.skg-btn:active { transform: translateY(0); }

.skg-btn--ghost {
  background: transparent;
  color: var(--skg-ink);
  border: 1.5px solid var(--skg-line);
}
.skg-btn--ghost:hover { border-color: var(--skg-amber); background: transparent; box-shadow: none; }

.skg-btn--market {
  background: var(--skg-market);
  color: var(--skg-market-ink);
}
.skg-btn--market:hover { box-shadow: 0 4px 0 rgba(37,99,235,.25); }

.skg-btn--sm { min-height: 36px; padding: 0 14px; font-size: 0.875rem; }

/* Chips */
.skg-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border-radius: 999px;
  font: 600 0.8125rem var(--skg-font-inter);
}

.skg-chip__dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: currentColor;
}

.skg-chip--ok { background: rgba(22,163,74,.1); color: var(--skg-ok); }
.skg-chip--warn { background: rgba(217,119,6,.1); color: var(--skg-warn); }
.skg-chip--stop { background: rgba(220,38,38,.1); color: var(--skg-stop); }

/* Header */
.skg-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: var(--skg-surface);
  border-bottom: 1px solid var(--skg-line);
  transition: box-shadow .2s ease;
}

.skg-header.is-scrolled { box-shadow: 0 4px 20px rgba(0,0,0,.08); }

.skg-header__inner {
  height: var(--skg-header-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.skg-logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--skg-ink);
  text-decoration: none;
  font: 700 1.25rem var(--skg-font-arch);
}

.skg-logo svg {
  width: 32px;
  height: 32px;
  flex-shrink: 0;
  fill: none;
  stroke: var(--skg-amber);
  stroke-width: 2;
}

.skg-nav {
  display: flex;
  align-items: center;
  gap: 28px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.skg-nav a {
  display: block;
  color: var(--skg-ink-2);
  text-decoration: none;
  font: 500 0.9375rem var(--skg-font-inter);
  position: relative;
  padding: 6px 0;
}

.skg-nav a:hover { color: var(--skg-ink); }

.skg-nav a.is-active {
  color: var(--skg-ink);
  font-weight: 600;
}

.skg-nav a.is-active::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--skg-amber);
  border-radius: 2px;
}

.skg-header__tools {
  display: inline-flex;
  align-items: center;
  gap: 12px;
}

.skg-icon-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border: 0;
  border-radius: var(--skg-radius);
  background: transparent;
  color: var(--skg-ink-2);
  cursor: pointer;
}

.skg-icon-btn:hover { background: var(--skg-bg); color: var(--skg-ink); }

.skg-menu-toggle { display: none; }

@media (max-width: 767px) {
  .skg-menu-toggle { display: inline-flex; }
  .skg-nav {
    display: none;
    position: absolute;
    top: var(--skg-header-h);
    left: 0;
    right: 0;
    background: var(--skg-surface);
    border-bottom: 1px solid var(--skg-line);
    flex-direction: column;
    align-items: flex-start;
    padding: 20px var(--skg-gutter);
    gap: 8px;
  }
  .skg-nav.is-open { display: flex; }
  .skg-nav a.is-active::after { display: none; }
}

/* Hero */
.skg-hero {
  background: linear-gradient(135deg, var(--skg-bg) 0%, #EBEEF2 100%);
  position: relative;
  overflow: hidden;
}

.skg-hero__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
  min-height: 520px;
  padding: 64px 0;
}

.skg-hero__copy p {
  font-size: 1.125rem;
  color: var(--skg-ink-2);
  max-width: 560px;
  margin: 0 0 32px;
}

.skg-hero__actions { display: flex; gap: 16px; flex-wrap: wrap; }

@media (prefers-color-scheme: dark) {
  .skg-hero { background: linear-gradient(135deg, var(--skg-bg) 0%, #0F2636 100%); }
}
[data-skg-theme='dark'] .skg-hero { background: linear-gradient(135deg, var(--skg-bg) 0%, #0F2636 100%); }

@media (max-width: 1023px) {
  .skg-hero__grid { grid-template-columns: 1fr; min-height: auto; }
}

/* Widgets */
.skg-widget {
  background: var(--skg-surface);
  border: 1px solid var(--skg-line);
  border-radius: var(--skg-radius-lg);
  padding: 28px;
}

.skg-widget__title {
  font: 700 1.25rem/1.2 var(--skg-font-arch);
  margin: 0 0 20px;
}

.skg-field {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-bottom: 16px;
}

.skg-field label {
  font: 600 0.75rem var(--skg-font-inter);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--skg-ink-2);
}

.skg-field input,
.skg-field select {
  height: 44px;
  padding: 0 12px;
  border: 1px solid var(--skg-line);
  border-radius: var(--skg-radius);
  background: var(--skg-surface);
  color: var(--skg-ink);
}

.skg-field input:focus,
.skg-field select:focus {
  outline: none;
  border-color: var(--skg-amber);
  box-shadow: 0 0 0 3px rgba(245,165,36,.2);
}

.skg-result {
  display: none;
  margin-top: 20px;
  padding: 20px;
  background: var(--skg-bg);
  border-radius: var(--skg-radius);
}

.skg-result.is-visible { display: block; }

.skg-result__row {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding: 8px 0;
  border-bottom: 1px solid var(--skg-line);
}

.skg-result__row:last-child { border-bottom: 0; }

/* Cards */
.skg-card {
  display: flex;
  flex-direction: column;
  background: var(--skg-surface);
  border: 1px solid var(--skg-line);
  border-radius: var(--skg-radius-lg);
  overflow: hidden;
  transition: transform .15s ease-out, border-color .15s ease-out;
}

.skg-card:hover {
  transform: translateY(-2px);
  border-color: var(--skg-amber);
}

.skg-card__media {
  aspect-ratio: 16 / 10;
  background: var(--skg-bg);
  display: flex;
  align-items: center;
  justify-content: center;
}

.skg-card__media img { width: 100%; height: 100%; object-fit: cover; }

.skg-card__body { padding: 24px; flex: 1; display: flex; flex-direction: column; }

.skg-card__badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font: 600 0.75rem var(--skg-font-inter);
  color: var(--skg-amber);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 10px;
}

.skg-card__title { margin: 0 0 10px; }
.skg-card__title a { color: var(--skg-ink); text-decoration: none; }
.skg-card__title a:hover { color: var(--skg-amber); }

.skg-card__excerpt {
  color: var(--skg-ink-2);
  margin: 0 0 18px;
  flex: 1;
}

.skg-card__link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font: 600 0.875rem var(--skg-font-inter);
  color: var(--skg-amber-ink);
  text-decoration: none;
}

/* Tables */
.skg-table-wrap {
  overflow-x: auto;
  border: 1px solid var(--skg-line);
  border-radius: var(--skg-radius-lg);
}

.skg-table {
  width: 100%;
  border-collapse: collapse;
  font: 0.9375rem/1.5 var(--skg-font-inter);
}

.skg-table th {
  text-align: left;
  padding: 14px 16px;
  background: var(--skg-bg);
  font: 600 0.6875rem var(--skg-font-inter);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--skg-ink-2);
  border-bottom: 1px solid var(--skg-line);
  white-space: nowrap;
}

.skg-table td {
  padding: 14px 16px;
  border-bottom: 1px solid var(--skg-line);
  vertical-align: top;
}

.skg-table tr:last-child td { border-bottom: 0; }

/* Prose */
.skg-prose { max-width: 720px; }

.skg-prose > * + * { margin-top: 1.25em; }

.skg-prose h2 {
  font: 700 1.75rem/1.15 var(--skg-font-arch);
  margin: 2em 0 0.6em;
}

.skg-prose h3 {
  font: 600 1.375rem/1.25 var(--skg-font-arch);
  margin: 1.6em 0 0.5em;
}

.skg-prose h4 {
  font: 600 1.0625rem/1.35 var(--skg-font-arch);
  margin: 1.4em 0 0.5em;
}

.skg-prose p { margin: 0; }

.skg-prose ul, .skg-prose ol { padding-left: 1.4em; }
.skg-prose li { margin: 0.35em 0; }

.skg-prose a { color: var(--skg-market); text-decoration: underline; text-underline-offset: 3px; }

.skg-prose table {
  width: 100%;
  border-collapse: collapse;
  font: 0.9375rem/1.5 var(--skg-font-inter);
  margin: 1.5em 0;
}

.skg-prose table th,
.skg-prose table td {
  padding: 12px 14px;
  border: 1px solid var(--skg-line);
  text-align: left;
}

.skg-prose table th {
  background: var(--skg-bg);
  font-weight: 600;
}

.skg-prose figure { margin: 1.5em 0; }
.skg-prose figcaption { font: 400 0.8125rem var(--skg-font-inter); color: var(--skg-muted); margin-top: 8px; }

.skg-prose blockquote {
  margin: 1.5em 0;
  padding: 16px 24px;
  border-left: 4px solid var(--skg-amber);
  background: var(--skg-bg);
  font: 400 1.0625rem/1.5 var(--skg-font-arch);
  color: var(--skg-ink-2);
}

/* Callouts */
.skg-note, .skg-warn {
  padding: 20px 24px;
  border-radius: 0 var(--skg-radius) var(--skg-radius) 0;
  margin: 24px 0;
}

.skg-note { background: var(--skg-amber-soft); border-left: 4px solid var(--skg-amber); }
.skg-warn { background: #FEF2F2; border-left: 4px solid var(--skg-stop); }
[data-skg-theme='dark'] .skg-note { background: rgba(245,165,36,.12); }
[data-skg-theme='dark'] .skg-warn { background: rgba(220,38,38,.12); }

@media (prefers-color-scheme: dark) {
  .skg-note { background: rgba(245,165,36,.12); }
  .skg-warn { background: rgba(220,38,38,.12); }
}

.skg-note__title, .skg-warn__title {
  font: 700 0.8125rem var(--skg-font-arch);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin: 0 0 6px;
}

.skg-note p, .skg-warn p { margin: 0; }

/* Zone meter */
.skg-zone {
  height: 10px;
  border-radius: 5px;
  background: linear-gradient(90deg, var(--skg-ok) 0%, var(--skg-ok) 33%, var(--skg-warn) 33%, var(--skg-warn) 66%, var(--skg-stop) 66%, var(--skg-stop) 100%);
  position: relative;
}

.skg-zone__mark {
  position: absolute;
  top: -4px;
  width: 18px;
  height: 18px;
  background: var(--skg-ink);
  border: 3px solid var(--skg-surface);
  border-radius: 50%;
  transform: translateX(-50%);
  box-shadow: 0 2px 6px rgba(0,0,0,.2);
}

.skg-zone__labels {
  display: flex;
  justify-content: space-between;
  font: 600 0.6875rem var(--skg-font-inter);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--skg-muted);
  margin-top: 6px;
}

/* Stepper */
.skg-steps {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 16px;
  counter-reset: step;
}

@media (max-width: 1023px) {
  .skg-steps { grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 639px) {
  .skg-steps { grid-template-columns: 1fr; }
}

.skg-step {
  position: relative;
  padding: 24px;
  background: var(--skg-surface);
  border: 1px solid var(--skg-line);
  border-radius: var(--skg-radius-lg);
}

.skg-step::before {
  counter-increment: step;
  content: counter(step, decimal-leading-zero);
  display: block;
  font: 700 1.5rem var(--skg-font-mono);
  color: var(--skg-amber);
  margin-bottom: 12px;
}

.skg-step__title {
  font: 700 1rem/1.25 var(--skg-font-arch);
  margin: 0 0 8px;
}

.skg-step__desc {
  font: 400 0.875rem/1.5 var(--skg-font-inter);
  color: var(--skg-ink-2);
  margin: 0;
}

/* Footer */
.skg-footer {
  background: var(--skg-ink);
  color: #CBD5E1;
  padding: 64px 0 32px;
}
.skg-footer .skg-logo { color: #F1F5F9; }

.skg-footer__cta {
  background: #12293A;
  border: 1px solid var(--skg-line);
  border-radius: var(--skg-radius-lg);
  padding: 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 48px;
}

@media (max-width: 767px) {
  .skg-footer__cta { flex-direction: column; align-items: flex-start; }
}

.skg-footer__cta h3 {
  font: 700 1.5rem/1.2 var(--skg-font-arch);
  color: var(--skg-surface);
  margin: 0 0 6px;
}

.skg-footer__cta p { margin: 0; color: var(--skg-muted); }

.skg-footer__grid {
  display: grid;
  grid-template-columns: 1.5fr repeat(3, 1fr);
  gap: 48px;
}

@media (max-width: 1023px) {
  .skg-footer__grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 639px) {
  .skg-footer__grid { grid-template-columns: 1fr; }
}

.skg-footer__col p { margin: 0 0 16px; color: var(--skg-muted); }

.skg-footer__menu {
  list-style: none;
  padding: 0;
  margin: 0;
}

.skg-list-plain { list-style: none; padding: 0; margin: 0; }
.skg-list-plain li + li { margin-top: 10px; }
.skg-list-plain a { color: var(--skg-ink); text-decoration: none; }
.skg-list-plain a:hover { color: var(--skg-amber); }

.skg-footer .skg-footer__menu li + li { margin-top: 10px; }

.skg-footer .skg-footer__menu a {
  color: #CBD5E1;
  text-decoration: none;
  font: 400 0.9375rem var(--skg-font-inter);
}

.skg-footer__menu a:hover { color: var(--skg-amber); }

.skg-footer__bottom {
  margin-top: 48px;
  padding-top: 24px;
  border-top: 1px solid var(--skg-line);
  display: flex;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  font: 400 0.8125rem var(--skg-font-inter);
  color: var(--skg-muted);
}

/* Utilities */
.skg-grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.skg-grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.skg-grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }

@media (max-width: 1023px) {
  .skg-grid-4 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 767px) {
  .skg-grid-2, .skg-grid-3, .skg-grid-4 { grid-template-columns: 1fr; }
}

.skg-flex { display: flex; }
.skg-items-center { align-items: center; }
.skg-justify-between { justify-content: space-between; }
.skg-gap-2 { gap: 8px; }
.skg-gap-4 { gap: 24px; }
.skg-wrap { flex-wrap: wrap; }
.skg-mt-2 { margin-top: 8px; }
.skg-mt-4 { margin-top: 24px; }
.skg-mb-0 { margin-bottom: 0; }
.skg-mb-1 { margin-bottom: 12px; }
.skg-mb-2 { margin-bottom: 24px; }
.skg-sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  border: 0;
  white-space: nowrap;
}

/* Pagination */
.skg-pagination {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-top: 48px;
}

.skg-pagination a, .skg-pagination span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 40px;
  height: 40px;
  padding: 0 12px;
  border-radius: var(--skg-radius);
  border: 1px solid var(--skg-line);
  text-decoration: none;
  font: 500 0.9375rem var(--skg-font-inter);
}

.skg-pagination a { color: var(--skg-ink); background: var(--skg-surface); }
.skg-pagination a:hover { border-color: var(--skg-amber); }
.skg-pagination .current { background: var(--skg-amber); color: var(--skg-amber-ink); border-color: var(--skg-amber); }

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation: none !important;
    transition: none !important;
    scroll-behavior: auto !important;
  }
}