:root {
  --brand-blue-light: #42abfc;
  --brand-blue: #107cf6;
  --brand-blue-deep: #0a5fc4;
  --brand-navy: #0e2855;
  --ink: #0a1628;
  --ink-strong: #050b16;
  --ink-muted: #5a6473;
  --ink-soft: #8892a0;
  --paper: #ffffff;
  --paper-soft: #f5f9ff;
  --paper-grey: #f4f6f9;
  --rule: #e3edf9;
  --rule-strong: #c9d7e8;
  --max: 1200px;
  --gutter: clamp(1.25rem, 4vw, 2.5rem);
  --section-y: clamp(3.5rem, 8vw, 6rem);
  --shadow-sm: 0 1px 2px rgba(10, 22, 40, 0.04), 0 2px 8px rgba(10, 22, 40, 0.04);
  --shadow-md: 0 1px 2px rgba(10, 22, 40, 0.04), 0 12px 32px rgba(16, 124, 246, 0.08);
  --sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

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

body {
  margin: 0;
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.65;
  color: var(--ink);
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

a {
  color: var(--brand-blue);
  text-decoration: none;
  transition: color 0.18s ease;
}

a:hover {
  color: var(--brand-navy);
}

button,
input,
textarea {
  font: inherit;
}

button {
  cursor: pointer;
}

::selection {
  background: var(--brand-blue);
  color: #fff;
}

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

.skip-link {
  position: absolute;
  top: -40px;
  left: 1rem;
  background: var(--ink-strong);
  color: #fff;
  padding: 0.5rem 0.75rem;
  border-radius: 2px;
  z-index: 100;
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 80;
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.site-header.scrolled {
  border-bottom-color: var(--rule);
  box-shadow: var(--shadow-sm);
}

.site-header .row {
  min-height: 82px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.9rem;
  color: var(--ink-strong);
}

.brand img {
  height: 44px;
  width: auto;
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.05;
}

.brand-text .name {
  font-size: 1rem;
  font-weight: 800;
  letter-spacing: -0.03em;
}

.brand-text .tag {
  font-size: 0.74rem;
  font-weight: 600;
  color: var(--ink-muted);
  letter-spacing: 0.02em;
}

.primary {
  display: flex;
  gap: 1.2rem;
  align-items: center;
  flex-wrap: nowrap;
}

.primary a {
  color: var(--ink-strong);
  font-size: 0.93rem;
  font-weight: 600;
  white-space: nowrap;
}

.header-cta {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  min-height: 2.95rem;
  padding: 0.8rem 1.35rem;
  border-radius: 2px;
  border: 1px solid transparent;
  font-size: 0.92rem;
  font-weight: 700;
  transition: transform 0.18s ease, box-shadow 0.18s ease, background 0.18s ease, color 0.18s ease, border-color 0.18s ease;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn-primary {
  color: #fff;
  background: linear-gradient(135deg, var(--brand-blue) 0%, var(--brand-navy) 100%);
  box-shadow: var(--shadow-md);
}

.btn-primary:hover {
  color: #fff;
}

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border-radius: 2px;
  border: 1px solid var(--rule);
  background: var(--paper);
  color: var(--ink-strong);
}

.mobile-nav {
  display: none;
  border-top: 1px solid var(--rule);
  background: rgba(255, 255, 255, 0.98);
  padding: 0.5rem var(--gutter) 1rem;
}

.mobile-nav.open {
  display: grid;
  gap: 0.35rem;
}

.mobile-nav a {
  color: var(--ink-strong);
  font-weight: 600;
  padding: 0.7rem 0;
}

.page-shell {
  padding-top: clamp(2rem, 6vw, 4rem);
  padding-bottom: var(--section-y);
  background:
    radial-gradient(circle at top left, rgba(66, 171, 252, 0.12), transparent 26%),
    linear-gradient(180deg, rgba(245, 249, 255, 0.92) 0%, rgba(255, 255, 255, 1) 18%);
}

.page-intro {
  max-width: 820px;
  margin: 0 auto 2rem;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.625rem;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--brand-blue);
}

.eyebrow::before {
  content: "";
  width: 1.75rem;
  height: 1.5px;
  background: var(--brand-blue);
}

h1,
h2,
h3,
h4 {
  margin: 0;
  color: var(--ink-strong);
  letter-spacing: -0.022em;
  line-height: 1.18;
}

h1 {
  margin-top: 1rem;
  font-size: clamp(2.1rem, 5vw, 3.3rem);
  font-weight: 700;
  line-height: 1.06;
}

h2 {
  font-size: clamp(1.55rem, 3vw, 2.2rem);
  font-weight: 600;
}

h3 {
  font-size: clamp(1.05rem, 1.6vw, 1.2rem);
  font-weight: 600;
  margin-bottom: 0.55rem;
}

h4 {
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--brand-navy);
}

.lede {
  margin-top: 1rem;
  font-size: clamp(1.02rem, 1.5vw, 1.18rem);
  line-height: 1.6;
  color: var(--ink-muted);
  max-width: 42rem;
}

.reader-message {
  margin-top: 1.3rem;
  padding: 0.85rem 1rem;
  border-left: 2px solid var(--brand-blue);
  background: rgba(66, 171, 252, 0.08);
  color: var(--ink-muted);
  font-size: 0.94rem;
}

.reader-message[hidden],
.shared-cta[hidden],
.share-generated[hidden] {
  display: none;
}

.board-note-page {
  max-width: 820px;
  margin: 0 auto;
}

.board-note-full {
  background: var(--paper);
  border: 1px solid var(--rule);
  border-top: 3px solid var(--brand-blue);
  border-radius: 4px;
  box-shadow: var(--shadow-sm);
  padding: clamp(1.5rem, 4vw, 3rem);
}

.note-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
  align-items: center;
  margin-bottom: 1rem;
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--brand-blue);
}

.note-meta .dot {
  color: var(--ink-soft);
}

.board-note-full p,
.board-note-full li {
  font-size: 1.04rem;
  line-height: 1.8;
  color: var(--ink);
}

.board-note-full p,
.board-note-full ul,
.board-note-full ol,
.board-note-full blockquote,
.note-takeaway,
.share-panel,
.shared-cta,
.article-actions {
  margin-top: 1.4rem;
}

.board-note-full .note-intro {
  font-size: 1.12rem;
  color: var(--ink-muted);
}

.board-note-full ul,
.board-note-full ol {
  padding-left: 1.25rem;
}

.board-note-full li + li {
  margin-top: 0.4rem;
}

.board-note-full blockquote {
  margin-left: 0;
  margin-right: 0;
  padding: 1rem 1.15rem;
  border-left: 3px solid var(--brand-blue);
  background: var(--paper-soft);
}

.board-note-full blockquote p {
  margin: 0;
  font-weight: 600;
  color: var(--ink-strong);
}

.note-takeaway {
  padding: 1.1rem 1.15rem;
  border: 1px solid var(--rule);
  border-radius: 3px;
  background: var(--paper-soft);
}

.note-takeaway p {
  margin-top: 0.65rem;
}

.article-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem 1rem;
  align-items: center;
}

.note-action,
.share-button {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  min-height: 2.75rem;
  padding: 0.72rem 1rem;
  border: 1px solid var(--rule-strong);
  border-radius: 2px;
  background: var(--paper);
  color: var(--ink-strong);
  text-decoration: none;
  font-size: 0.92rem;
  font-weight: 700;
  transition: border-color 0.18s ease, color 0.18s ease, transform 0.18s ease;
}

.note-action:hover,
.share-button:hover {
  color: var(--brand-blue);
  border-color: var(--brand-blue);
  transform: translateY(-1px);
}

.share-panel {
  border: 1px solid var(--rule);
  border-top: 3px solid var(--brand-blue);
  border-radius: 4px;
  background: var(--paper-soft);
  padding: clamp(1.25rem, 3vw, 2rem);
}

.share-panel-head h2 {
  margin-bottom: 0.6rem;
}

.share-panel-subtext {
  color: var(--ink-muted);
  max-width: 42rem;
}

.share-panel-top {
  display: block;
}

.share-choice-grid {
  display: grid;
  gap: 0.85rem;
  margin-top: 1.5rem;
}

@media (min-width: 760px) {
  .share-choice-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.share-choice {
  display: block;
  width: 100%;
  text-align: left;
  min-height: 0;
  padding: 1rem 1rem 1.05rem;
  border: 1px solid var(--rule);
  border-radius: 3px;
  background: #fff;
  color: var(--ink-strong);
  transition: border-color 0.18s ease, box-shadow 0.18s ease, background 0.18s ease, transform 0.18s ease;
}

.share-choice:hover {
  border-color: rgba(16, 124, 246, 0.45);
  box-shadow: 0 10px 24px rgba(16, 124, 246, 0.08);
  transform: translateY(-1px);
}

.share-choice-title {
  display: block;
  font-size: 1rem;
  font-weight: 700;
  color: var(--ink-strong);
}

.share-choice-copy {
  display: block;
  margin-top: 0.45rem;
  font-size: 0.92rem;
  line-height: 1.55;
  color: var(--ink-muted);
}

.share-details {
  display: grid;
  gap: 1rem;
  margin-top: 1rem;
}

.share-block,
.share-secondary {
  border: 1px solid var(--rule);
  border-radius: 3px;
  background: var(--paper);
  padding: 1rem;
  scroll-margin-top: 7rem;
  transition: border-color 0.18s ease, box-shadow 0.18s ease, background 0.18s ease;
}

.share-block[hidden] {
  display: none;
}

.share-block h3 {
  margin-bottom: 0.35rem;
}

.share-block p {
  margin: 0;
  color: var(--ink-muted);
  font-size: 0.96rem;
}

.share-form {
  display: grid;
  gap: 0.75rem;
  margin-top: 0.9rem;
}

.share-form label,
.share-output-label {
  font-size: 0.86rem;
  font-weight: 700;
  color: var(--ink-strong);
}

.share-form input,
.share-generated textarea {
  width: 100%;
  border: 1px solid var(--rule-strong);
  border-radius: 2px;
  padding: 0.82rem 0.9rem;
  background: #fff;
  color: var(--ink-strong);
}

.share-generated {
  margin-top: 0.9rem;
}

.share-generated textarea {
  min-height: 182px;
  resize: vertical;
  line-height: 1.6;
}

.share-helper {
  color: var(--ink-muted);
  font-size: 0.86rem;
}

.share-button-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
  margin-top: 0.95rem;
}

.share-button {
  background: #fff;
}

.share-button-secondary {
  min-height: 2.35rem;
  padding: 0.58rem 0.85rem;
  font-size: 0.83rem;
  font-weight: 700;
  color: var(--ink-muted);
}

.share-block-active,
.share-choice-active,
.share-secondary-active {
  border-color: rgba(16, 124, 246, 0.45);
  box-shadow: 0 0 0 3px rgba(16, 124, 246, 0.1);
  background: linear-gradient(180deg, #ffffff 0%, #f7fbff 100%);
}

.share-option {
  padding: 0.9rem 1rem;
  border: 1px solid var(--rule);
  border-radius: 3px;
  background: #fff;
}

.share-option + .share-option {
  margin-top: 0.75rem;
}

.share-option-label {
  display: block;
  font-size: 0.86rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--brand-blue);
}

.share-option-preview {
  margin-top: 0.55rem;
  font-size: 0.96rem;
  line-height: 1.6;
  color: var(--ink-strong);
}

.share-option .share-button-row {
  margin-top: 0.85rem;
}

.share-secondary {
  margin-top: 1rem;
  background: rgba(255, 255, 255, 0.72);
}

.share-secondary h3 {
  margin-bottom: 0.35rem;
}

.share-secondary p {
  margin: 0;
  color: var(--ink-muted);
  font-size: 0.94rem;
}

.shared-cta {
  padding: 1rem 1.15rem;
  border: 1px solid var(--rule);
  border-radius: 3px;
  background: #fff;
}

.shared-cta p {
  margin: 0;
  color: var(--ink-muted);
}

.shared-cta a {
  font-weight: 700;
}

.site-footer {
  background: #0b1527;
  color: #fff;
  padding: 3.6rem 0 2rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) repeat(2, minmax(0, 1fr));
  gap: 2rem;
}

.footer-grid img.logo-w {
  height: 40px;
  width: auto;
  margin-bottom: 1rem;
}

.footer-grid p {
  font-size: 0.9rem;
  line-height: 1.6;
  color: #b8c0ce;
  max-width: 24rem;
}

.footer-grid h4 {
  color: #fff;
  margin-bottom: 0.85rem;
}

.footer-grid ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

.footer-grid li {
  margin-bottom: 0.5rem;
}

.footer-grid a {
  color: #b8c0ce;
  font-size: 0.9rem;
}

.footer-grid a:hover {
  color: #fff;
}

.footer-bar {
  margin-top: 2rem;
  padding-top: 1rem;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}

.footer-bar .muted,
.footer-bar a {
  color: #b8c0ce;
  font-size: 0.88rem;
}

@media (max-width: 980px) {
  .primary,
  .header-cta .btn {
    display: none;
  }

  .nav-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
  }
}

@media (max-width: 760px) {
  .footer-grid {
    grid-template-columns: 1fr;
  }

  .article-actions,
  .share-button-row {
    align-items: stretch;
  }

  .share-choice {
    padding: 0.95rem 0.95rem 1rem;
  }

  .note-action,
  .share-button {
    width: 100%;
    justify-content: center;
  }
}