/* ============================================================
   The Operator Index — modern grotesk, high contrast, minimal.
   Independent publication, contemporary execution.
   ============================================================ */

:root {
  --bg:          #FFFFFF;
  --bg-soft:     #F7F7F8;
  --ink:         #0A0A0A;
  --ink-soft:    #404045;
  --ink-mute:    #6E6E76;
  --rule:        #E5E5E8;
  --rule-soft:   #EFEFF1;
  --accent:      #0040E0;
  --accent-ink:  #002BA0;
  --accent-tint: #EBF1FF;

  --font-body:    "Manrope", system-ui, -apple-system, "Helvetica Neue", sans-serif;
  --font-display: "Manrope", system-ui, sans-serif;
  --font-mono:    "JetBrains Mono", ui-monospace, "SF Mono", Menlo, monospace;

  --measure: 38rem;
  --measure-wide: 56rem;
  --label-col: 5rem;
  --grid-gutter: 2rem;

  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 1rem;
  --space-4: 1.5rem;
  --space-5: 2.5rem;
  --space-6: 4rem;
  --space-7: 6rem;
  --space-8: 9rem;

  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

/* legacy hook from the old paper-grain SVG — keep zero-sized so the inline svg in HTML doesn't paint */
.grain { position: absolute; width: 0; height: 0; opacity: 0; }

* { box-sizing: border-box; }

html, body { margin: 0; padding: 0; }

body {
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-body);
}

a {
  color: var(--accent);
  text-decoration: none;
  border-bottom: 1px solid currentColor;
  transition: color 120ms ease;
}
a:hover { color: var(--accent-ink); }

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

em { font-style: italic; }
strong { font-weight: 600; }

/* ------------------------------------------------------------ */
/* Layout                                                        */
/* ------------------------------------------------------------ */

.page {
  max-width: 64rem;
  margin: 0 auto;
  padding: var(--space-6) var(--space-5) var(--space-7);
}

@media (max-width: 720px) {
  .page { padding: var(--space-5) var(--space-4) var(--space-6); }
  :root { font-size: 16px; }
}

/* Section row: label column + body column */
.section,
.masthead {
  display: grid;
  grid-template-columns: var(--label-col) minmax(0, 1fr);
  gap: 0 var(--grid-gutter);
  padding: var(--space-6) 0;
}

@media (max-width: 720px) {
  .section,
  .masthead {
    grid-template-columns: 1fr;
    gap: var(--space-3) 0;
    padding: var(--space-5) 0;
  }
}

/* ------------------------------------------------------------ */
/* Rules                                                         */
/* ------------------------------------------------------------ */

.rule,
.rule--double,
.rule--section {
  border: 0;
  height: 1px;
  background: var(--rule);
  margin: 0;
  grid-column: 1 / -1;
}
.rule--double { background: var(--ink); height: 1px; }
.rule--section { background: var(--rule-soft); }

/* ------------------------------------------------------------ */
/* Masthead                                                      */
/* ------------------------------------------------------------ */

.masthead {
  display: block;
  padding: var(--space-3) 0 var(--space-6);
  border-top: 1px solid var(--ink);
  border-bottom: 1px solid var(--ink);
}

.masthead-top,
.masthead-bottom {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  flex-wrap: wrap;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--ink-mute);
  padding: var(--space-3) 0;
}

.masthead-top { justify-content: space-between; }

.masthead-top .mono,
.masthead-bottom .mono {
  display: inline-flex;
  align-items: center;
}

.mono-sep {
  display: inline-block;
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--ink-mute);
  margin: 0 var(--space-2);
}

.wordmark {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(3rem, 10vw, 7rem);
  line-height: 0.95;
  letter-spacing: -0.04em;
  margin: var(--space-4) 0 var(--space-5);
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  color: var(--ink);
}

.wordmark-line { display: block; font-style: normal; }

.wordmark-line--1 {
  font-weight: 300;
  font-size: 0.4em;
  letter-spacing: -0.01em;
  color: var(--ink-mute);
  text-transform: uppercase;
  letter-spacing: 0.18em;
  margin-bottom: 0.6em;
}

.wordmark-line--2 { font-weight: 700; }
.wordmark-line--3 { font-weight: 700; color: var(--accent); }
.wordmark-period   { color: var(--accent); }

.subtitle {
  font-family: var(--font-display);
  font-style: normal;
  font-weight: 400;
  font-size: clamp(1.05rem, 1.6vw, 1.25rem);
  line-height: 1.45;
  color: var(--ink-soft);
  max-width: var(--measure-wide);
  margin: 0 0 var(--space-5);
}

.mark {
  background: var(--accent-tint);
  color: var(--accent-ink);
  padding: 0 0.25em;
  border-radius: 2px;
}

/* ------------------------------------------------------------ */
/* Section headers                                               */
/* ------------------------------------------------------------ */

.section-head {
  position: sticky;
  top: var(--space-4);
  align-self: start;
}

@media (max-width: 720px) {
  .section-head {
    position: static;
    display: flex;
    align-items: baseline;
    gap: var(--space-3);
  }
}

.section-mark {
  display: block;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--ink-mute);
  margin-bottom: var(--space-2);
}

.section-title {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(1.4rem, 2.2vw, 1.65rem);
  line-height: 1.15;
  letter-spacing: -0.02em;
  color: var(--ink);
  margin: 0;
}

.section-body {
  max-width: var(--measure);
  font-size: 1.0625rem;
  line-height: 1.65;
  color: var(--ink-soft);
}

.section-body p {
  margin: 0 0 var(--space-4);
}
.section-body p:last-child { margin-bottom: 0; }

.section-body p.lede {
  font-size: 1.18rem;
  line-height: 1.5;
  color: var(--ink);
  font-weight: 400;
  margin-bottom: var(--space-4);
}

.section-body em { color: var(--ink); font-style: italic; }
.section-body strong { color: var(--ink); font-weight: 600; }

.dropcap {
  /* simplify — no oversized initial cap, modern look prefers hierarchy via size, not ornament */
  font-weight: inherit;
  font-size: inherit;
}

/* ------------------------------------------------------------ */
/* Methodology / Benefits ordered lists                          */
/* ------------------------------------------------------------ */

.method-list,
.benefits-list,
.instrument-list {
  list-style: none;
  padding: 0;
  margin: var(--space-4) 0 0;
  display: grid;
  gap: var(--space-5);
}

.method-list > li,
.benefits-list > li,
.instrument-list > li {
  display: grid;
  grid-template-columns: 3rem 1fr;
  gap: var(--space-3);
  align-items: baseline;
}

.method-label,
.benefits-num,
.instrument-num {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--ink-mute);
  padding-top: 0.25em;
}

.method-list h3,
.benefits-list h3,
.instrument-list h4 {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.05rem;
  line-height: 1.3;
  letter-spacing: -0.005em;
  color: var(--ink);
  margin: 0 0 var(--space-2);
}

.method-list p,
.benefits-list p,
.instrument-list p {
  font-size: 1rem;
  line-height: 1.6;
  color: var(--ink-soft);
  margin: 0;
}

.instrument-header {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.95rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--ink-mute);
  margin: var(--space-5) 0 var(--space-3);
}

/* ------------------------------------------------------------ */
/* Pull quote                                                    */
/* ------------------------------------------------------------ */

.pull {
  margin: var(--space-5) 0;
  padding: var(--space-4) var(--space-4);
  border-left: 3px solid var(--accent);
  background: var(--bg-soft);
}

.pull p {
  font-family: var(--font-display);
  font-size: 1.1rem;
  line-height: 1.5;
  color: var(--ink);
  font-style: normal;
  font-weight: 500;
  margin: 0;
}

.aside {
  font-size: 0.95rem;
  color: var(--ink-mute);
  font-style: normal;
}

.aside-inline {
  font-size: 0.9rem;
  color: var(--ink-mute);
}

/* ------------------------------------------------------------ */
/* Contact / colophon                                            */
/* ------------------------------------------------------------ */

.contact-simple { text-align: left; }

.contact-lede {
  font-size: 1rem;
  color: var(--ink-soft);
  margin: 0 0 var(--space-3);
}

.contact-email {
  margin: 0 0 var(--space-2);
}
.contact-email a {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.4rem;
  border-bottom: 0;
  letter-spacing: -0.01em;
}
.contact-email a:hover { color: var(--accent-ink); }

.contact-meta {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--ink-mute);
  margin: 0;
}

.colophon {
  display: block;
  padding: var(--space-6) 0 0;
  border-top: 1px solid var(--ink);
  margin-top: var(--space-6);
}

.colophon-nav {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2) 0;
  padding: var(--space-4) 0;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--ink-mute);
}

.colophon-link {
  color: var(--ink-soft);
  border-bottom: 0;
  transition: color 120ms ease;
}
.colophon-link:hover { color: var(--accent); }

.colophon-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2) 0;
  padding: var(--space-3) 0 var(--space-4);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--ink-mute);
}

/* ------------------------------------------------------------ */
/* Doc pages (privacy, methodology, imprint)                     */
/* ------------------------------------------------------------ */

.doc-page .page { max-width: 56rem; }

.doc-masthead {
  padding: 0 0 var(--space-5);
  border-bottom: 1px solid var(--ink);
}

.doc-crumb {
  margin-bottom: var(--space-4);
}

.doc-crumb-link {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--ink-mute);
  border-bottom: 0;
}
.doc-crumb-link:hover { color: var(--accent); }

.doc-crumb-arrow { display: inline-block; margin-right: 0.4em; }

.doc-masthead-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2) 0;
  padding: var(--space-3) 0;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--ink-mute);
}

.doc-title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(2.5rem, 7vw, 4.5rem);
  line-height: 1;
  letter-spacing: -0.04em;
  margin: var(--space-4) 0 var(--space-4);
  color: var(--ink);
}

.doc-title-amp {
  display: inline-block;
  color: var(--accent);
  font-weight: 400;
  margin: 0 0.05em;
}

.doc-title-scope {
  display: inline-block;
  font-weight: 700;
  color: var(--ink);
}

.doc-subtitle {
  font-family: var(--font-display);
  font-style: normal;
  font-weight: 400;
  font-size: clamp(1.05rem, 1.6vw, 1.2rem);
  line-height: 1.5;
  color: var(--ink-soft);
  max-width: var(--measure-wide);
  margin: 0 0 var(--space-5);
}

.doc-masthead-bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2) 0;
  padding: var(--space-3) 0;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--ink-mute);
}

/* ------------------------------------------------------------ */
/* Imprint grid                                                  */
/* ------------------------------------------------------------ */

.imprint-grid {
  display: grid;
  grid-template-columns: 10rem 1fr;
  gap: var(--space-3) var(--space-5);
  margin: var(--space-3) 0 0;
  padding: 0;
}

.imprint-grid--narrow { grid-template-columns: 8rem 1fr; }

.imprint-grid dt {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--ink-mute);
  padding-top: 0.2em;
}

.imprint-grid dd {
  margin: 0;
  font-size: 1rem;
  line-height: 1.55;
  color: var(--ink);
}

@media (max-width: 720px) {
  .imprint-grid,
  .imprint-grid--narrow {
    grid-template-columns: 1fr;
    gap: var(--space-1) 0;
  }
  .imprint-grid dd { margin: 0 0 var(--space-3); }
}

/* ------------------------------------------------------------ */
/* Rule lists (privacy, retention, rights)                       */
/* ------------------------------------------------------------ */

.rule-list {
  list-style: none;
  padding: 0;
  margin: var(--space-3) 0 0;
  display: grid;
  gap: var(--space-3);
}

.rule-list > li {
  display: grid;
  grid-template-columns: 9rem 1fr;
  gap: var(--space-3);
  align-items: baseline;
  padding: var(--space-3) 0;
  border-top: 1px solid var(--rule-soft);
}
.rule-list > li:first-child { border-top: 0; padding-top: 0; }

.rule-list-label {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--ink-mute);
}

.rule-list-body {
  font-size: 1rem;
  line-height: 1.55;
  color: var(--ink-soft);
}

@media (max-width: 720px) {
  .rule-list > li {
    grid-template-columns: 1fr;
    gap: var(--space-1);
  }
}

/* ------------------------------------------------------------ */
/* Revision history                                              */
/* ------------------------------------------------------------ */

.revision { padding: var(--space-5) 0 0; }

.revision-list {
  margin: var(--space-3) 0 0;
  padding: 0;
}

.revision-list dt {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--ink-mute);
  margin: 0 0 var(--space-2);
}

.revision-list dd {
  margin: 0 0 var(--space-4);
  font-size: 1rem;
  line-height: 1.55;
  color: var(--ink-soft);
}

/* ------------------------------------------------------------ */
/* Sectional contact box                                         */
/* ------------------------------------------------------------ */

.section--contact .section-body { font-size: 1.0625rem; }