/* ========================================================================
   STA Brand Book — styles mirror the live stagtm.com treatment.
   Crimson Pro is the default (headings + body), weight 400 throughout.
   Inter is the UI face (nav, buttons, labels, metadata), weights 500–700.
   Body text is 14px / line-height 1.4 — the live-site default.
   ======================================================================== */

:root {
  --ink: #2B333E;
  --signal: #E89C21;
  --bone: #FBF7EE;
  --champagne: #C2B59B;

  --accent-cream:    #FCF5DF;
  --accent-sky:      #EDF8FD;
  --accent-blush:    #FAE3E4;
  --accent-lavender: #EBECFF;
  --accent-mint:     #EDFDF8;

  --cloud: #FFFFFF;

  --ink-04: rgba(43, 51, 62, 0.04);
  --ink-08: rgba(43, 51, 62, 0.08);
  --ink-12: rgba(43, 51, 62, 0.12);
  --ink-20: rgba(43, 51, 62, 0.20);
  --ink-40: rgba(43, 51, 62, 0.40);
  --ink-60: rgba(43, 51, 62, 0.60);
  --ink-80: rgba(43, 51, 62, 0.80);

  --gradient-rainbow: linear-gradient(90deg, #ffa301 0%, #ff3201 33%, #114cd0 66%, #8e01ff 100%);
  --gradient-red-purple: linear-gradient(90deg, #ff3201 0%, #8e01ff 100%);
  --gradient-orange: linear-gradient(90deg, #ff9f01 0%, #ff8500 100%);
  --gradient-red: linear-gradient(90deg, #fe0000 0%, #ff5833 100%);
  --gradient-blue: linear-gradient(90deg, #1c16af 0%, #038df7 100%);
  --gradient-purple: linear-gradient(90deg, #b100ff 0%, #dd00ff 100%);

  --font-display: "Crimson Pro", Georgia, "Times New Roman", serif;
  --font-ui: "Inter", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-mono: ui-monospace, "SF Mono", Menlo, Consolas, monospace;

  --container: 1200px;
  --gutter: 1.25rem;
}

@media (min-width: 768px) {
  :root { --gutter: 2rem; }
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bone);
  color: var(--ink);
  font-family: var(--font-display);
  font-size: 0.875rem;
  line-height: 1.4;
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a { color: inherit; text-decoration: none; }
a:hover { color: var(--signal); }

button { font: inherit; background: none; border: none; padding: 0; cursor: pointer; color: inherit; }

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

ul, ol { padding-left: 0; list-style: none; margin: 0; }

/* ========================================================================
   Type scale — mirrors globals.css on the live site.
   Mobile baseline, desktop override at 768px. Weight 400 across all.
   ======================================================================== */
h1, .h1 { font-family: var(--font-display); font-size: 2.5rem;   line-height: 1.15; font-weight: 400; margin: 0; letter-spacing: -0.01em; }
h2, .h2 { font-family: var(--font-display); font-size: 2rem;     line-height: 1.2;  font-weight: 400; margin: 0; letter-spacing: -0.01em; }
h3, .h3 { font-family: var(--font-display); font-size: 1.75rem;  line-height: 1.2;  font-weight: 400; margin: 0; }
h4, .h4 { font-family: var(--font-display); font-size: 1.5rem;   line-height: 1.3;  font-weight: 400; margin: 0; }
h5, .h5 { font-family: var(--font-display); font-size: 1.25rem;  line-height: 1.3;  font-weight: 400; margin: 0; }
h6, .h6 { font-family: var(--font-display); font-size: 1.125rem; line-height: 1.4;  font-weight: 400; margin: 0; }
p      { font-family: var(--font-display); font-size: 0.875rem; line-height: 1.4;  font-weight: 400; margin: 0; }

@media (min-width: 768px) {
  h1, .h1 { font-size: 5rem;     line-height: 1.1;   }
  h2, .h2 { font-size: 3.5rem;   line-height: 1.125; }
  h3, .h3 { font-size: 3.125rem; line-height: 1.12;  }
  h4, .h4 { font-size: 2.25rem;  line-height: 1.2;   }
  h5, .h5 { font-size: 1.5rem;   line-height: 1.3;   }
}

.eyebrow, .ui-label {
  font-family: var(--font-ui);
  font-size: 0.6875rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--ink-60);
}

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

/* ========================================================================
   Header
   ======================================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  background: rgba(251, 247, 238, 0.92);
  backdrop-filter: saturate(180%) blur(10px);
  border-bottom: 1px solid var(--ink-08);
}

.site-header__bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.875rem 0;
}

.site-header__brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  min-width: 0;
}

.site-header__mark { height: 28px; width: auto; }

.site-header__title {
  font-family: var(--font-display);
  font-size: 1.5rem;
  line-height: 1;
  color: var(--ink);
}

.site-header__sub {
  font-family: var(--font-ui);
  font-size: 0.625rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--ink-60);
  margin-top: 0.15rem;
}

.site-header__actions { display: flex; align-items: center; gap: 0.5rem; }

.site-nav {
  border-top: 1px solid var(--ink-08);
}

.site-nav__list {
  display: flex;
  gap: 1.5rem;
  overflow-x: auto;
  padding: 0.6rem 0;
  scrollbar-width: none;
}
.site-nav__list::-webkit-scrollbar { display: none; }

.site-nav__link {
  font-family: var(--font-ui);
  font-size: 0.6875rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--ink-60);
  white-space: nowrap;
  padding: 0.3rem 0;
}

.site-nav__link:hover { color: var(--signal); }

/* ========================================================================
   Buttons
   ======================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-ui);
  font-size: 0.6875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  padding: 0.75rem 1.1rem;
  border: 1px solid transparent;
  transition: background-color 0.15s ease, color 0.15s ease, border-color 0.15s ease;
  cursor: pointer;
  line-height: 1;
}

.btn--primary { background: var(--ink); color: var(--bone); }
.btn--primary:hover { background: var(--signal); color: var(--bone); }

.btn--signal { background: var(--signal); color: var(--bone); }
.btn--signal:hover { background: var(--ink); color: var(--bone); }

.btn--ghost { background: transparent; color: var(--ink); border-color: var(--ink-20); }
.btn--ghost:hover { color: var(--signal); border-color: var(--signal); }

.btn--sm { padding: 0.45rem 0.75rem; font-size: 0.625rem; }

.btn svg { flex-shrink: 0; }

/* ========================================================================
   Hero
   ======================================================================== */
.hero { padding: 3rem 0 2rem; }

@media (min-width: 768px) { .hero { padding: 5rem 0 3rem; } }

.hero__eyebrow { color: var(--signal); margin-bottom: 1.5rem; }

.hero__title {
  max-width: 20ch;
  margin-bottom: 1.75rem;
  letter-spacing: -0.02em;
}

.hero__lede {
  max-width: 48ch;
  color: var(--ink-80);
  font-size: 1rem;
  line-height: 1.5;
  margin-bottom: 2.25rem;
}

.hero__ctas { display: flex; flex-wrap: wrap; gap: 0.5rem; }

/* ========================================================================
   Sections
   ======================================================================== */
.section {
  padding: 3.5rem 0;
  border-top: 1px solid var(--ink-08);
  scroll-margin-top: 5rem;
}

@media (min-width: 768px) { .section { padding: 5rem 0; } }

.section-header { margin-bottom: 2.5rem; }

@media (min-width: 768px) { .section-header { margin-bottom: 3.5rem; } }

.section-header__meta {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 0.5rem;
}

.section-header__anchor {
  font-family: var(--font-ui);
  font-size: 0.6875rem;
  font-weight: 500;
  color: var(--ink-40);
}

.section-header__anchor:hover { color: var(--signal); }

.section-header__title { margin-bottom: 1rem; letter-spacing: -0.02em; }

.section-header__lede {
  color: var(--ink-80);
  max-width: 60ch;
  font-size: 1rem;
  line-height: 1.55;
}

/* ========================================================================
   Voice
   ======================================================================== */
.pillars {
  display: grid;
  gap: 0.75rem;
  margin-bottom: 2.5rem;
}

@media (min-width: 768px) { .pillars { grid-template-columns: repeat(4, 1fr); } }

.pillar {
  background: var(--cloud);
  border: 1px solid var(--ink-08);
  padding: 1.25rem;
}

.pillar__name { font-family: var(--font-display); font-size: 1.25rem; line-height: 1.2; color: var(--ink); margin-bottom: 0.5rem; }
.pillar__detail { font-size: 0.875rem; line-height: 1.5; color: var(--ink-80); }

.dos-donts {
  display: grid;
  gap: 0.75rem;
  margin-bottom: 2.5rem;
}

@media (min-width: 768px) { .dos-donts { grid-template-columns: 1fr 1fr; } }

.dos-donts__col { background: var(--cloud); padding: 1.5rem; border-left: 2px solid var(--ink-08); }

.dos-donts__col--do { border-left-color: var(--ink); }
.dos-donts__col--dont { border-left-color: var(--signal); }

.dos-donts__heading {
  font-family: var(--font-ui);
  font-size: 0.6875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  margin-bottom: 0.9rem;
  color: var(--ink);
}

.dos-donts__col--dont .dos-donts__heading { color: var(--signal); }

.dos-donts__list { display: grid; gap: 0.6rem; font-size: 0.9375rem; line-height: 1.5; }

.dos-donts__list li { display: flex; gap: 0.6rem; }
.dos-donts__list li::before { content: "·"; color: var(--ink-60); flex-shrink: 0; }
.dos-donts__col--dont .dos-donts__list li::before { content: "×"; color: var(--signal); }

.examples { display: grid; gap: 0.5rem; }

.example {
  display: grid;
  grid-template-columns: 1fr;
  border: 1px solid var(--ink-08);
}

@media (min-width: 768px) { .example { grid-template-columns: 1fr 1fr; } }

.example__cell { padding: 1.25rem; }

.example__cell--before {
  background: var(--cloud);
  border-bottom: 1px solid var(--ink-08);
}

@media (min-width: 768px) {
  .example__cell--before { border-bottom: 0; border-right: 1px solid var(--ink-08); }
}

.example__cell--after { background: var(--bone); }

.example__label {
  font-family: var(--font-ui);
  font-size: 0.625rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  margin-bottom: 0.5rem;
}

.example__cell--before .example__label { color: var(--signal); }
.example__cell--after .example__label { color: var(--ink); }

.example__text { font-size: 0.9375rem; line-height: 1.5; color: var(--ink); }

.example__cell--before .example__text { color: var(--ink-60); text-decoration: line-through; text-decoration-color: rgba(232, 156, 33, 0.4); }

/* ========================================================================
   Color — swatches + gradients
   ======================================================================== */
.swatches {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.75rem;
  margin-bottom: 3rem;
}

@media (min-width: 640px) { .swatches { grid-template-columns: repeat(3, 1fr); } }
@media (min-width: 960px) { .swatches { grid-template-columns: repeat(4, 1fr); } }

.swatch { display: flex; flex-direction: column; gap: 0.5rem; }

.swatch__chip {
  aspect-ratio: 4 / 3;
  padding: 1rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  cursor: pointer;
  border: 1px solid var(--ink-08);
  transition: transform 0.12s ease;
}

.swatch__chip:hover { transform: scale(0.985); }
.swatch__chip:focus-visible { outline: 2px solid var(--signal); outline-offset: 2px; }

.swatch__name { font-family: var(--font-display); font-size: 1.375rem; line-height: 1; }

.swatch__hex { font-family: var(--font-ui); font-size: 0.75rem; font-weight: 500; opacity: 0.85; }

.swatch__tap {
  font-family: var(--font-ui);
  font-size: 0.5625rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  opacity: 0.75;
  margin-top: 0.2rem;
}

.swatch__chip[data-light="true"] { color: var(--bone); }
.swatch__chip[data-light="false"] { color: var(--ink); }

.swatch__meta { display: flex; justify-content: space-between; align-items: flex-start; gap: 0.75rem; }

.swatch__role { font-size: 0.8125rem; color: var(--ink-60); line-height: 1.45; }

.gradients {
  display: grid;
  gap: 1rem;
}

@media (min-width: 640px) { .gradients { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 960px) { .gradients { grid-template-columns: repeat(3, 1fr); } }

.gradient {
  display: grid;
  grid-template-rows: auto auto auto;
  gap: 0.5rem;
}

.gradient__chip {
  aspect-ratio: 5 / 3;
  border: 1px solid var(--ink-08);
}

.gradient__name { font-family: var(--font-display); font-size: 1.25rem; line-height: 1.15; color: var(--ink); }

.gradient__role { font-size: 0.8125rem; color: var(--ink-60); line-height: 1.45; }

.gradient__meta { display: flex; justify-content: space-between; align-items: flex-start; gap: 0.75rem; }

.gradient__stops {
  font-family: var(--font-ui);
  font-size: 0.625rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  color: var(--ink-60);
  text-transform: uppercase;
}

/* Text-gradient live samples in the Gradient section. */
.gradient-sample {
  font-family: var(--font-display);
  font-size: 1.5rem;
  line-height: 1.1;
  font-weight: 400;
  background-clip: text;
  -webkit-background-clip: text;
  color: transparent;
  -webkit-text-fill-color: transparent;
}

/* ========================================================================
   Type
   ======================================================================== */
.type-stack { display: grid; gap: 0.75rem; margin-bottom: 3rem; }

@media (min-width: 768px) { .type-stack { grid-template-columns: repeat(2, 1fr); } }

.type-card { background: var(--cloud); border: 1px solid var(--ink-08); padding: 1.5rem; }

.type-card__role {
  font-family: var(--font-ui);
  font-size: 0.625rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--ink-60);
  margin-bottom: 0.5rem;
}

.type-card__family {
  font-size: 2.25rem;
  line-height: 1.1;
  color: var(--ink);
  margin-bottom: 0.25rem;
}

.type-card__family--inter { font-family: var(--font-ui); font-weight: 500; }

.type-card__weights {
  font-family: var(--font-ui);
  font-size: 0.75rem;
  color: var(--ink-60);
  margin-bottom: 0.9rem;
}

.type-card__notes { font-size: 0.875rem; color: var(--ink-80); line-height: 1.5; }

.ramp-heading {
  font-family: var(--font-ui);
  font-size: 0.6875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--ink-60);
  margin-bottom: 1rem;
}

.ramp { display: grid; gap: 0; }

.ramp-row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.5rem;
  padding: 0.9rem 0;
  border-bottom: 1px solid var(--ink-08);
  align-items: baseline;
}

@media (min-width: 768px) { .ramp-row { grid-template-columns: 12rem 1fr auto; gap: 1.5rem; } }

.ramp-row__meta {
  font-family: var(--font-ui);
  font-size: 0.6875rem;
  font-weight: 500;
  color: var(--ink-60);
}

.ramp-row__meta-name { font-weight: 600; color: var(--ink); letter-spacing: 0.1em; text-transform: uppercase; margin-right: 0.4rem; }

.ramp-row__sample {
  color: var(--ink);
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* ========================================================================
   Illustration
   ======================================================================== */
.illustration-style {
  font-size: 1rem;
  color: var(--ink-80);
  line-height: 1.55;
  margin: 0 0 1.5rem;
  max-width: 72ch;
}

/* ========================================================================
   Key frames
   ======================================================================== */
.keyframes { display: grid; gap: 2.5rem; }

.keyframe {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
  align-items: start;
}

@media (min-width: 768px) { .keyframe { grid-template-columns: 1fr 2fr; } }

.keyframe__body { order: 2; }

.keyframe__label {
  font-family: var(--font-ui);
  font-size: 0.625rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--ink-60);
  margin-bottom: 0.5rem;
}

.keyframe__title {
  font-family: var(--font-display);
  font-size: 1.75rem;
  line-height: 1.15;
  color: var(--ink);
  margin-bottom: 0.5rem;
}

.keyframe__desc { color: var(--ink-80); line-height: 1.55; }

.keyframe__image {
  order: 1;
  background: var(--cloud);
  border: 1px solid var(--ink-08);
  overflow: hidden;
}

.keyframe__image img { width: 100%; height: auto; display: block; }

@media (min-width: 768px) {
  .keyframe__body { order: 1; }
  .keyframe__image { order: 2; }
}

/* ========================================================================
   Assets
   ======================================================================== */
.asset-group { margin-bottom: 2.5rem; }

.asset-group__heading {
  font-family: var(--font-display);
  font-size: 1.25rem;
  line-height: 1.2;
  margin-bottom: 1rem;
  color: var(--ink);
}

.asset-group__heading .count {
  font-family: var(--font-ui);
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--ink-60);
  margin-left: 0.5rem;
}

.asset-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 0.75rem;
}

.asset {
  background: var(--cloud);
  border: 1px solid var(--ink-08);
  display: flex;
  flex-direction: column;
}

.asset__preview {
  aspect-ratio: 4 / 3;
  background: var(--bone);
  border-bottom: 1px solid var(--ink-08);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  padding: 1rem;
}

.asset__preview img { max-width: 100%; max-height: 100%; object-fit: contain; }

.asset__preview--placeholder {
  font-family: var(--font-ui);
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  color: var(--ink-60);
  text-transform: uppercase;
  background: repeating-linear-gradient(135deg, var(--ink-04) 0 8px, transparent 8px 16px), var(--bone);
}

.asset__body { padding: 1rem; flex: 1; display: flex; flex-direction: column; gap: 0.6rem; }

.asset__name { font-family: var(--font-display); font-size: 1.0625rem; line-height: 1.2; color: var(--ink); }

.asset__meta {
  font-family: var(--font-ui);
  font-size: 0.625rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--ink-60);
  margin-top: 0.1rem;
}

.asset__notes { font-size: 0.8125rem; color: var(--ink-60); line-height: 1.45; }

.asset__actions { display: flex; flex-wrap: wrap; gap: 0.35rem; margin-top: auto; }

/* ========================================================================
   Footer
   ======================================================================== */
.site-footer { padding: 3rem 0; margin-top: 3rem; border-top: 1px solid var(--ink-08); }

.site-footer__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}

@media (min-width: 768px) { .site-footer__grid { grid-template-columns: 1fr 1fr; } }

.site-footer__brand { font-family: var(--font-display); font-size: 1.75rem; margin-bottom: 0.4rem; }
.site-footer__caption { color: var(--ink-60); font-size: 0.8125rem; }

.site-footer__right {
  font-family: var(--font-ui);
  font-size: 0.625rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--ink-60);
}

@media (min-width: 768px) { .site-footer__right { text-align: right; } }

/* ========================================================================
   Dialogs
   ======================================================================== */
dialog {
  border: 1px solid var(--ink-20);
  background: var(--bone);
  color: var(--ink);
  padding: 0;
  max-width: 48rem;
  width: calc(100% - 2rem);
  max-height: 90vh;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

dialog:not([open]) { display: none; }

dialog::backdrop { background: rgba(43, 51, 62, 0.7); }

.dialog__head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.1rem 1.25rem;
  border-bottom: 1px solid var(--ink-08);
}

.dialog__title {
  font-family: var(--font-display);
  font-size: 1.5rem;
  line-height: 1.1;
  color: var(--ink);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.dialog__subtitle {
  font-family: var(--font-ui);
  font-size: 0.625rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--ink-60);
  margin-top: 0.25rem;
}

.dialog__close { padding: 0.4rem; color: var(--ink-60); line-height: 0; }
.dialog__close:hover { color: var(--signal); }

.dialog__steps {
  background: var(--cloud);
  padding: 1rem 1.25rem 1.1rem;
  border-bottom: 1px solid var(--ink-08);
  font-size: 0.875rem;
}

.dialog__steps-label {
  font-family: var(--font-ui);
  font-size: 0.625rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--ink-60);
  margin-bottom: 0.5rem;
}

.dialog__steps ol { padding-left: 1.25rem; color: var(--ink-80); list-style: decimal; }
.dialog__steps li { margin-bottom: 0.3rem; }

.dialog__body { padding: 1rem 1.25rem; overflow: auto; flex: 1; }

.dialog__pre {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  line-height: 1.55;
  color: var(--ink-80);
  white-space: pre-wrap;
  margin: 0;
}

.dialog__foot {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1.25rem;
  border-top: 1px solid var(--ink-08);
}

.dialog__foot-meta {
  font-family: var(--font-ui);
  font-size: 0.625rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--ink-60);
}

/* ========================================================================
   Utilities
   ======================================================================== */
.ui { font-family: var(--font-ui); }
.mono { font-family: var(--font-mono); }

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

@media (prefers-reduced-motion: reduce) {
  * { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
  html { scroll-behavior: auto; }
}