/* Graham Notes — preview. Self-hosted fonts only; no third-party requests. */

@font-face {
  font-family: "Libre Caslon Display";
  src: url("../fonts/libre-caslon-display.woff2") format("woff2");
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "Libre Caslon Text";
  src: url("../fonts/libre-caslon-text.woff2") format("woff2");
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "Libre Caslon Text";
  src: url("../fonts/libre-caslon-text-italic.woff2") format("woff2");
  font-weight: 400;
  font-style: italic;
  font-display: swap;
}
@font-face {
  font-family: "Libre Caslon Text";
  src: url("../fonts/libre-caslon-text-bold.woff2") format("woff2");
  font-weight: 700;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "Source Sans 3";
  src: url("../fonts/source-sans-3.woff2") format("woff2");
  font-weight: 200 900;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "Source Sans 3";
  src: url("../fonts/source-sans-3-italic.woff2") format("woff2");
  font-weight: 200 900;
  font-style: italic;
  font-display: swap;
}

/* Modular scale, ratio 1.25 from a 1.125rem (18px) body */
:root {
  --paper: #F4F0E6;
  --paper-2: #E9E3D5;
  --surface: #FBF8F0;
  --ink: #151412;
  --ink-soft: #3B372F;
  --accent: #16312A;
  --accent-hover: #0F241E;
  --border: #D3CDC0;
  --flag-bg: #EBE4D3;
  --footer-bg: #151412;
  --footer-text: #F4F0E6;
  --footer-muted: #C8C1B3;
  --focus: #16312A;
  --max: 70rem;
  --measure: 38.5rem;
  --font-display: "Libre Caslon Display", "Libre Caslon Text", "Palatino Linotype", "Times New Roman", serif;
  --font-serif: "Libre Caslon Text", "Palatino Linotype", "Times New Roman", serif;
  --font-sans: "Source Sans 3", "Segoe UI", system-ui, sans-serif;
  --step--1: 0.8rem;      /* 12.8 — eyebrows, overlines */
  --step-0: 1rem;         /* 16 — compact UI */
  --step-1: 1.125rem;     /* 18 — body */
  --step-2: 1.25rem;      /* 20 — lead */
  --step-3: 1.563rem;     /* 25 — h3 */
  --step-4: 1.953rem;     /* 31 — h2 */
  --step-5: 2.441rem;     /* 39 */
  --step-6: 3.052rem;     /* 49 — h1 ceiling */
  --space-1: 0.5rem;
  --space-2: 1rem;
  --space-3: 1.75rem;
  --space-4: 2.75rem;
  --space-5: 4.5rem;
  --space-6: 6.5rem;
  --radius: 2px;
}

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

html {
  scroll-behavior: smooth;
  color-scheme: light;
  scroll-padding-top: 7.75rem;
}
@media (min-width: 52rem) {
  html { scroll-padding-top: 5.5rem; }
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: var(--step-1);
  font-weight: 400;
  line-height: 1.65;
  letter-spacing: 0.005em;
  color: var(--ink);
  background: var(--paper);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

a {
  color: var(--accent);
  text-underline-offset: 0.18em;
  text-decoration-thickness: 1px;
}
a:hover { color: var(--accent-hover); }

:focus { outline: none; }
:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 3px;
}
.site-footer a:focus-visible,
.site-footer :focus-visible {
  outline-color: var(--footer-text);
}

.skip-link {
  position: absolute;
  left: 0.85rem;
  top: -100%;
  z-index: 1000;
  background: var(--ink);
  color: var(--footer-text);
  padding: 0.65rem 1.05rem;
  font-weight: 600;
  font-size: var(--step-0);
  letter-spacing: 0.02em;
  text-decoration: none;
  border-radius: var(--radius);
}
.skip-link:focus,
.skip-link:focus-visible {
  top: 0.85rem;
  outline: 3px solid var(--footer-text);
  outline-offset: 3px;
  color: var(--footer-text);
}

.wrap {
  width: min(100% - 2.5rem, var(--max));
  margin-inline: auto;
}
@media (max-width: 40rem) {
  .wrap { width: min(100% - 2rem, var(--max)); }
}

/* Header */
.site-header {
  border-bottom: 1px solid var(--border);
  background: var(--paper);
  position: sticky;
  top: 0;
  z-index: 50;
}
.site-header::before {
  content: "";
  display: block;
  height: 3px;
  background: var(--accent);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.25rem 2rem;
  padding: 1rem 0 0.95rem;
  flex-wrap: wrap;
}
.brand {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  text-decoration: none;
  color: var(--ink);
}
.brand:hover { color: var(--ink); }
.brand-mark {
  width: 2.6rem;
  height: 2.6rem;
  flex: 0 0 2.6rem;
}
.brand-text {
  display: flex;
  flex-direction: column;
  gap: 0.12rem;
  line-height: 1;
}
.brand-name {
  font-family: var(--font-serif);
  font-weight: 400;
  font-size: 1.3rem;
  letter-spacing: -0.01em;
}
.brand-person {
  font-family: var(--font-sans);
  font-size: 0.78rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-soft);
}

.site-nav ul {
  display: flex;
  flex-wrap: wrap;
  gap: 0.15rem 1.6rem;
  list-style: none;
  margin: 0;
  padding: 0;
}
.site-nav a {
  color: var(--ink);
  text-decoration: none;
  font-weight: 560;
  font-size: 0.95rem;
  letter-spacing: 0.03em;
  padding: 0.4rem 0;
}
.site-nav a:hover {
  color: var(--accent);
  text-decoration: underline;
}

/* Hero */
.hero {
  padding: var(--space-6) 0 var(--space-5);
  border-bottom: 1px solid var(--border);
}
.hero-kicker {
  font-family: var(--font-sans);
  font-size: var(--step--1);
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--accent);
  margin: 0 0 1.35rem;
}
.hero h1 {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(2.35rem, 2.1rem + 2.4vw, var(--step-6));
  line-height: 1.14;
  letter-spacing: -0.018em;
  margin: 0 0 1.4rem;
  max-width: 13.5em;
}
@media (min-width: 52rem) {
  .hero h1 .break-desktop { display: block; }
  .hero h1 { max-width: none; }
}

.hero-lede {
  font-size: var(--step-2);
  line-height: 1.55;
  letter-spacing: 0.01em;
  max-width: 36rem;
  margin: 0 0 2rem;
  color: var(--ink);
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
  margin-bottom: 2.25rem;
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 3rem;
  padding: 0.65rem 1.35rem;
  border-radius: var(--radius);
  font-family: var(--font-sans);
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: 0.03em;
  text-decoration: none;
  border: 1.5px solid var(--accent);
  cursor: pointer;
}
.btn-primary {
  background: var(--accent);
  color: var(--surface);
}
.btn-primary:hover {
  background: var(--accent-hover);
  border-color: var(--accent-hover);
  color: var(--surface);
}
.btn-secondary {
  background: transparent;
  color: var(--accent);
}
.btn-secondary:hover {
  background: var(--paper-2);
  color: var(--accent-hover);
}
.btn[disabled],
.btn[aria-disabled="true"] {
  cursor: not-allowed;
  background: var(--accent);
  color: var(--surface);
  opacity: 1;
}

.audience-note {
  max-width: 50rem;
  margin: 0;
  padding: 1rem 0 0;
  border-top: 1px solid var(--border);
  color: var(--ink);
  font-size: 1.02rem;
  line-height: 1.55;
}

/* Sections */
.section {
  padding: var(--space-5) 0;
  border-bottom: 1px solid var(--border);
  scroll-margin-top: 5.75rem;
}
.hero { scroll-margin-top: 5.75rem; }
@media (max-width: 51.99rem) {
  .section, .hero { scroll-margin-top: 8.25rem; }
}
.section:last-of-type { border-bottom: 0; }

.section-head {
  display: flex;
  gap: 1rem;
  align-items: baseline;
  margin: 0 0 1.35rem;
}
.section-num {
  font-family: var(--font-serif);
  font-variant-numeric: oldstyle-nums;
  color: var(--accent);
  font-weight: 400;
  font-size: var(--step-0);
  letter-spacing: 0.08em;
  flex: 0 0 auto;
}
.section h2 {
  font-family: var(--font-serif);
  font-weight: 400;
  font-size: clamp(1.7rem, 1.4rem + 1.2vw, var(--step-4));
  line-height: 1.2;
  letter-spacing: -0.015em;
  margin: 0;
}
.section .lead {
  max-width: var(--measure);
  margin: 0 0 1.35rem;
  font-size: var(--step-2);
  line-height: 1.55;
}
.section p { margin: 0 0 1.1rem; }
.section p:last-child { margin-bottom: 0; }

/* Buy box */
.buy-box {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  margin-top: 1.75rem;
}
.buy-box dl { margin: 0; }
.buy-box .row {
  display: grid;
  grid-template-columns: minmax(9rem, 13.5rem) 1fr;
  gap: 0.7rem 1.75rem;
  padding: 1.15rem 1.5rem;
  border-top: 1px solid var(--border);
  margin: 0;
}
.buy-box .row:first-child { border-top: 0; }
.buy-box .row:nth-child(even) { background: color-mix(in srgb, var(--paper) 55%, var(--surface)); }
.buy-box dt {
  margin: 0;
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: 0.95rem;
  letter-spacing: 0.02em;
  color: var(--ink);
  padding-top: 0.15rem;
}
.buy-box dd {
  margin: 0;
  color: var(--ink);
  line-height: 1.55;
}
@media (max-width: 36rem) {
  .buy-box .row {
    grid-template-columns: 1fr;
    gap: 0.3rem;
    padding: 1.05rem 1.15rem;
  }
}

/* How it works */
.steps {
  list-style: none;
  margin: 1.75rem 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
}
@media (min-width: 52rem) {
  .steps { grid-template-columns: repeat(4, 1fr); gap: 1.15rem; }
}
.steps li {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.4rem 1.2rem 1.5rem;
  border-top: 3px solid var(--accent);
}
.steps .num {
  display: block;
  font-family: var(--font-serif);
  font-style: italic;
  font-weight: 400;
  color: var(--accent);
  font-size: 1.35rem;
  line-height: 1;
  margin-bottom: 0.75rem;
}
.steps h3 {
  font-family: var(--font-serif);
  font-size: 1.2rem;
  font-weight: 400;
  letter-spacing: -0.01em;
  line-height: 1.25;
  margin: 0 0 0.5rem;
}
.steps p { margin: 0; font-size: 1.02rem; line-height: 1.55; color: var(--ink); }

/* What to send */
.split {
  display: grid;
  gap: 1.25rem;
  margin-top: 1.5rem;
}
@media (min-width: 52rem) {
  .split { grid-template-columns: 1fr 1fr; gap: 1.5rem; align-items: stretch; }
}
.split > .panel { height: 100%; }
.panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem 1.5rem 1.6rem;
}
.panel h3 {
  font-family: var(--font-serif);
  font-size: 1.35rem;
  font-weight: 400;
  letter-spacing: -0.01em;
  margin: 0 0 0.4rem;
}
.panel .sub {
  margin: 0 0 1rem;
  color: var(--ink-soft);
  font-size: 1rem;
}
.field-list {
  margin: 0;
  padding-left: 1.15rem;
}
.field-list li { margin: 0 0 0.38rem; }
.field-list li:last-child { margin-bottom: 0; }

/* Contact */
.contact-grid {
  display: grid;
  gap: 2.5rem;
  margin-top: 1.5rem;
}
@media (min-width: 56rem) {
  .contact-grid { grid-template-columns: 1fr 1.3fr; gap: 3.5rem; align-items: start; }
}
.contact-name {
  font-family: var(--font-serif);
  font-size: 1.3rem;
  margin: 0 0 1.25rem;
}
.contact-list {
  list-style: none;
  margin: 0 0 1.35rem;
  padding: 0;
}
.contact-list li {
  margin: 0 0 1.1rem;
  padding: 0;
}
.contact-list .label {
  display: block;
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--ink-soft);
  margin-bottom: 0.2rem;
}
.contact-list a { font-weight: 600; }

/* Form */
.form-panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem 1.5rem 1.6rem;
}
.form-flag {
  margin: 0 0 1.4rem;
  padding: 0.95rem 1.05rem;
  background: var(--flag-bg);
  border: 1px solid var(--border);
  border-left: 3px solid var(--ink);
  color: var(--ink);
  font-size: 1rem;
  line-height: 1.5;
}
.form-flag:focus { outline: 3px solid var(--focus); outline-offset: 3px; }

.form-grid {
  display: grid;
  gap: 1.1rem 1.15rem;
}
@media (min-width: 40rem) {
  .form-grid { grid-template-columns: 1fr 1fr; }
  .form-grid .full { grid-column: 1 / -1; }
}
.field { display: flex; flex-direction: column; gap: 0.35rem; }
.field label {
  font-weight: 600;
  font-size: 0.95rem;
  letter-spacing: 0.01em;
}
.req {
  font-weight: 400;
  color: var(--ink-soft);
  font-size: 0.88rem;
  letter-spacing: 0;
}
input, select, textarea {
  font: inherit;
  color: var(--ink);
  background: var(--paper);
  border: 1px solid #7A7468;
  border-radius: var(--radius);
  min-height: 2.85rem;
  padding: 0.45rem 0.75rem;
  width: 100%;
}
input:hover, select:hover { border-color: var(--ink-soft); }
.form-note {
  margin: 0.95rem 0 1.25rem;
  color: var(--ink);
  font-size: 1rem;
}
.form-actions { margin: 0; }

/* Footer */
.site-footer {
  background: var(--footer-bg);
  color: var(--footer-text);
  padding: 3rem 0 3.1rem;
  margin-top: 0;
}
.site-footer a { color: var(--footer-text); }
.site-footer a:hover { color: #fff; }
.footer-brand {
  font-family: var(--font-serif);
  font-weight: 400;
  font-size: 1.25rem;
  letter-spacing: -0.01em;
  margin: 0 0 0.9rem;
}
.footer-meta, .footer-legal {
  margin: 0 0 0.55rem;
  color: var(--footer-muted);
  font-size: 0.98rem;
  line-height: 1.55;
  max-width: 42rem;
}
.footer-legal { margin-bottom: 0.85rem; }
.footer-nav {
  margin: 0.4rem 0 0;
  font-weight: 600;
  letter-spacing: 0.02em;
}

/* Privacy page */
.page-main { padding: 4rem 0 5rem; }
.page-main h1 {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(2.1rem, 1.6rem + 2vw, 2.8rem);
  letter-spacing: -0.02em;
  line-height: 1.15;
  margin: 0 0 1.5rem;
}
.prose { max-width: var(--measure); }
.prose h2 {
  font-family: var(--font-serif);
  font-size: 1.4rem;
  font-weight: 400;
  letter-spacing: -0.012em;
  margin: 2.35rem 0 0.7rem;
}
.prose p { margin: 0 0 1.1rem; }
.prose ul { margin: 0 0 1.1rem; padding-left: 1.2rem; }
.prose li { margin-bottom: 0.32rem; }

@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;
  }
}

@media (max-width: 40rem) {
  body { font-size: 1.0625rem; }
  .hero { padding: 3.25rem 0 2.75rem; }
  .section { padding: 3rem 0; }
  .page-main { padding: 2.75rem 0 3.5rem; }
  .form-panel { padding: 1.2rem 1.1rem 1.3rem; }
  .hero-actions .btn { flex: 1 1 auto; }
  .header-inner { gap: 0.65rem 1rem; padding: 0.85rem 0 0.7rem; }
  .site-nav { width: 100%; }
  .site-nav ul {
    gap: 0.1rem 0.85rem;
    width: 100%;
    flex-wrap: nowrap;
  }
  .site-nav a {
    font-size: 0.84rem;
    letter-spacing: 0.01em;
    padding: 0.2rem 0 0.1rem;
    white-space: nowrap;
  }
}

/* Netlify Forms honeypot: visually hidden, not in tab order (see tabindex/-1 and aria-hidden in HTML). */
.hp {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}