@font-face {
  font-family: "Playfair Display";
  src: url("/media/playfair-display.woff2") format("woff2");
  font-weight: 500 700;
  font-display: swap;
}

@font-face {
  font-family: Montserrat;
  src: url("/media/montserrat.woff2") format("woff2");
  font-weight: 400 750;
  font-display: swap;
}

@font-face {
  font-family: "Dancing Script";
  src: url("/media/dancing-script.woff2") format("woff2");
  font-weight: 600;
  font-display: swap;
}

:root {
  color-scheme: light;
  --navy: #0a1f44;
  --night: #07142c;
  --ink: #102543;
  --muted: #465570;
  --link: #075b9b;
  --teal: #2ed1b2;
  --sky: #1e90ff;
  --violet: #6a0dad;
  --pink: #ff4da6;
  --pale: #f3f7fb;
  --mist: #f5f3fc;
  --white: #fff;
  --line: #dce5f0;
  --light-text: #c4d4ea;
  --heading: "Playfair Display", Georgia, serif;
  --body: Montserrat, system-ui, sans-serif;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--white); color: var(--ink); font: 400 1rem/1.65 var(--body); }
img { display: block; max-width: 100%; }
figure, blockquote, p, h1, h2, h3 { margin: 0; }
button { font: inherit; }
a { color: inherit; text-underline-offset: 0.2em; }
:focus-visible { outline: 2px solid #005fae; outline-offset: 4px; }
[hidden] { display: none !important; }
section[id] { scroll-margin-top: 24px; }

.shell { width: min(1240px, calc(100% - 112px)); margin-inline: auto; }
.skip-link {
  position: fixed;
  z-index: 10;
  top: 12px;
  left: 12px;
  padding: 10px 15px;
  border-radius: 6px;
  background: var(--navy);
  color: var(--white);
  transform: translateY(-160%);
}
.skip-link:focus { transform: translateY(0); }

.site-header { background: var(--white); border-bottom: 1px solid #dee7f1; }
.header-inner { min-height: 78px; display: flex; align-items: center; justify-content: space-between; gap: 25px; }
.brand { display: inline-flex; align-items: center; flex: none; gap: 9px; text-decoration: none; }
.brand img:first-child { width: 51px; height: auto; }
.brand img:last-child { width: 143px; height: auto; }
.main-nav { display: flex; flex-wrap: wrap; align-items: center; justify-content: flex-end; gap: 7px clamp(15px, 2.7vw, 34px); }
.main-nav a {
  position: relative;
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  color: var(--ink);
  font-size: 0.86rem;
  font-weight: 650;
  text-decoration: none;
}
.main-nav a:hover, .main-nav a[aria-current] { color: var(--link); }
.main-nav a:hover::after, .main-nav a[aria-current]::after { position: absolute; inset: auto 0 6px; height: 2px; background: var(--teal); content: ""; }

.dark-section { color: var(--white); }
.dark-section :focus-visible, .site-footer :focus-visible { outline-color: #85e8d6; }
.hero {
  position: relative;
  overflow: hidden;
  background: radial-gradient(ellipse at 77% 92%, #16356d 0, transparent 44%),
    radial-gradient(ellipse at 4% 97%, #142851 0, transparent 48%),
    linear-gradient(120deg, #081c3e, #07152d 53%, #0c1c3e);
}
.hero::before, .hero::after {
  position: absolute;
  left: -25%;
  bottom: -235px;
  width: 85%;
  height: 290px;
  border-top: 1px solid rgb(45 155 228 / 27%);
  border-radius: 50%;
  transform: rotate(-10deg);
  pointer-events: none;
  content: "";
}
.hero::after { bottom: -248px; border-top-color: rgb(153 115 241 / 32%); transform: rotate(-12deg); }
.hero-inner {
  position: relative;
  z-index: 1;
  min-height: 570px;
  display: grid;
  grid-template-columns: 1.04fr 0.96fr;
  align-items: center;
  gap: clamp(25px, 4.2vw, 62px);
  padding-block: clamp(38px, 5.2vw, 75px);
}
.eyebrow {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--link);
  font-size: 0.73rem;
  font-weight: 750;
  letter-spacing: 0.13em;
  text-transform: uppercase;
}
.eyebrow::before { width: 18px; height: 2px; flex: none; border-radius: 6px; background: #2580c1; content: ""; }
.dark-section .eyebrow { color: #aee9ed; }
.dark-section .eyebrow::before { background: var(--teal); }
.hero h1 {
  margin-block: 20px 23px;
  font: 600 clamp(2.8rem, 5.35vw, 5.35rem)/1.07 var(--heading);
  letter-spacing: -0.048em;
  text-wrap: balance;
}
.hero h1 span { color: #91eadb; }
.hero-copy > p:not(.eyebrow) {
  max-width: 480px;
  color: #dae6f6;
  font-size: clamp(1rem, 1.5vw, 1.12rem);
  line-height: 1.65;
}
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 31px; }
.button {
  display: inline-flex;
  align-items: center;
  justify-content: space-between;
  gap: 17px;
  min-height: 50px;
  padding: 10px 17px;
  border: 1px solid transparent;
  border-radius: 9px;
  font-size: 0.89rem;
  font-weight: 750;
  text-decoration: none;
  transition: background-color 180ms ease, border-color 180ms ease;
}
.button span { font-size: 1.13rem; line-height: 1; }
.button-primary { background: var(--teal); color: #061d31; }
.button-primary:hover { background: #76e5d0; }
.button-outline { border-color: #6d8bb8; color: #f6faff; }
.button-outline:hover { border-color: #9bdddf; background: #142d55; }
.hero-image { position: relative; isolation: isolate; min-width: 0; overflow: hidden; border: 1px solid #45638a; border-radius: 24px 24px 86px 24px; background: #132c54; box-shadow: 0 24px 75px rgb(3 10 28 / 38%); }
.hero-image::after {
  position: absolute;
  inset: 0;
  background: linear-gradient(150deg, rgb(15 44 85 / 14%), transparent 42%, transparent 68%, rgb(8 19 47 / 24%));
  pointer-events: none;
  content: "";
}
.hero-image img { width: 100%; height: auto; aspect-ratio: 36 / 29; object-fit: cover; }

.section { padding-block: clamp(54px, 6.25vw, 90px); }
.topics-section { background: #fcfdff; }
.section-intro { display: flex; align-items: end; justify-content: space-between; gap: 30px; margin-bottom: 31px; }
.section-intro h2, .about h2, .disc-intro h2 {
  font: 600 clamp(2.4rem, 4.1vw, 4rem)/1.1 var(--heading);
  letter-spacing: -0.046em;
  text-wrap: balance;
}
.section-intro > p { max-width: 420px; padding-bottom: 2px; color: var(--muted); font-size: 0.96rem; }
.card-grid { display: grid; gap: clamp(15px, 2vw, 26px); }
.topic-grid, .reading-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.audience-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.card { min-width: 0; }
.card-link {
  height: 100%;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 17px;
  background: var(--white);
  text-decoration: none;
  box-shadow: 0 6px 20px rgb(22 51 92 / 5%);
  transition: border-color 170ms ease, box-shadow 170ms ease;
}
.card-link:hover { border-color: #94aeca; box-shadow: 0 12px 25px rgb(22 51 92 / 10%); }
.card-image { position: relative; overflow: hidden; background: #dfe9f6; }
.card-image img { width: 100%; height: auto; aspect-ratio: 30 / 19; object-fit: cover; transition: transform 220ms ease; }
.card-link:hover img { transform: scale(1.025); }
.topic-card { --topic-accent: #198774; }
.topic-card[data-accent="blue"] { --topic-accent: #247fcb; }
.topic-card[data-accent="violet"] { --topic-accent: #8444bd; }
.topic-card .card-image { border-bottom: 3px solid var(--topic-accent); }
.card-body { display: flex; flex: 1; flex-direction: column; align-items: start; padding: clamp(16px, 2.1vw, 28px); }
.card-category { margin-bottom: 7px; color: var(--link); font-size: 0.71rem; font-weight: 750; letter-spacing: 0.09em; text-transform: uppercase; }
.card h3 { font: 600 clamp(1.47rem, 2.35vw, 2.1rem)/1.13 var(--heading); letter-spacing: -0.026em; }
.card h3 + p { margin-block: 9px 18px; color: var(--muted); font-size: 0.92rem; }
.card-action { display: flex; align-items: center; justify-content: space-between; gap: 13px; width: 100%; margin-top: auto; color: var(--link); font-size: 0.83rem; font-weight: 750; }
.card-action span { display: inline-grid; place-items: center; flex: none; width: 33px; height: 33px; border: 1px solid #d8e5f0; border-radius: 50%; font-size: 1.06rem; }
.card-link:hover .card-action { text-decoration: underline; }
.audiences-section { border-top: 1px solid #e2eaf5; background: var(--pale); }
.audience-card .card-image img { aspect-ratio: 2.05 / 1; object-position: 50% 43%; }
.audience-card h3 { font-size: clamp(1.8rem, 2.9vw, 2.55rem); }

.disc-section {
  padding-block: clamp(56px, 7vw, 101px);
  background: radial-gradient(ellipse at 5% 110%, #223773 0, transparent 43%),
    radial-gradient(ellipse at 92% -30%, #35245a 0, transparent 58%),
    linear-gradient(115deg, #0a1f44, #091632);
}
.disc-grid { display: grid; grid-template-columns: 0.8fr 1.2fr; gap: clamp(27px, 5.2vw, 75px); align-items: center; }
.disc-intro h2 { margin-block: 17px 19px; text-wrap: initial; }
.disc-intro > p:not(.eyebrow) { max-width: 390px; color: #d6e2f3; }
.disc-source { display: inline-flex; align-items: baseline; gap: 8px; margin-top: 17px; color: #a3f0e0; font-size: 0.81rem; font-weight: 650; }
.disc-explorer { min-width: 0; padding: clamp(14px, 2.35vw, 28px); border: 1px solid #4b6292; border-radius: 21px; background: rgb(22 42 81 / 74%); }
.disc-scenario { margin-bottom: 17px; color: #e0ecfb; font-size: 0.9rem; }
.disc-scenario strong { display: block; margin-bottom: 4px; color: #aee9ed; font-size: 0.7rem; font-weight: 750; letter-spacing: 0.1em; text-transform: uppercase; }
.disc-tabs { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 7px; margin-bottom: 14px; }
.disc-tabs button {
  --disc-accent: #82e8da;
  display: flex;
  flex-direction: column;
  align-items: start;
  gap: 5px;
  min-height: 60px;
  min-width: 0;
  padding: 7px 9px;
  border: 1px solid #61779a;
  border-radius: 9px;
  background: #152b50;
  color: #eef6ff;
  font-size: 0.69rem;
  font-weight: 650;
  text-align: left;
  cursor: pointer;
}
.disc-tabs button[data-disc-tab="i"] { --disc-accent: #f6a5d2; }
.disc-tabs button[data-disc-tab="s"] { --disc-accent: #91cbff; }
.disc-tabs button[data-disc-tab="c"] { --disc-accent: #c5a8fd; }
.disc-tabs button span:first-child { color: var(--disc-accent); font: 700 1.17rem/1.1 var(--heading); }
.disc-tabs button[aria-selected="true"] { border-color: var(--disc-accent); background: #24416c; }
.disc-tabs button:hover { background: #24416c; }
.disc-panel { padding: clamp(14px, 2vw, 23px); border: 1px solid #586e98; border-radius: 11px; background: #0e2346; }
.disc-panel + .disc-panel { margin-top: 10px; }
.disc-panel[role="tabpanel"] { margin-top: 0; min-height: 203px; }
.disc-emphasis { color: #a6e7dc; font-size: 0.78rem; font-weight: 750; }
.disc-panel blockquote { margin-block: 8px 12px; color: var(--white); font: 500 clamp(1.14rem, 1.87vw, 1.63rem)/1.43 var(--heading); }
.disc-panel > p:last-child { color: #d1dff4; font-size: 0.84rem; }

.library { background: #fcfdff; }
.about { padding-block: clamp(44px, 5.6vw, 78px); border-top: 1px solid var(--line); background: var(--mist); }
.about-inner { display: grid; grid-template-columns: minmax(195px, 0.67fr) 1.33fr; align-items: center; gap: clamp(27px, 6.4vw, 88px); max-width: 1000px; }
.about-inner img { width: 100%; max-width: 340px; height: auto; padding: 15px; border: 1px solid #e3dcef; border-radius: 16px; background: #fff; }
.about h2 { max-width: 600px; }
.about h2 + p { max-width: 520px; margin-top: 14px; color: var(--muted); }
.about .handwritten { margin-top: 13px; color: var(--violet); font: 600 1.82rem/1.25 "Dancing Script", cursive; }

.site-footer { background: #091a37; color: #e1eaf8; }
.footer-inner { display: flex; justify-content: space-between; align-items: center; gap: 24px; padding-block: 26px; font-size: 0.85rem; }
.footer-identity { display: flex; align-items: center; gap: 12px; }
.footer-identity > a { padding: 4px; border-radius: 7px; background: #fff; }
.footer-identity img { height: auto; }
.footer-name { font: 600 1.25rem/1.2 var(--heading); }
.footer-identity p + p { margin-top: 4px; color: var(--light-text); font-size: 0.77rem; }
.footer-inner nav { display: flex; flex-wrap: wrap; gap: 10px 19px; }
.footer-inner nav a { display: inline-flex; align-items: center; gap: 6px; min-height: 36px; font-weight: 600; text-decoration: none; }
.footer-inner nav a:hover { text-decoration: underline; }

.detail-header { padding-block: 23px 48px; background: linear-gradient(135deg, #edf4fb, #f5f2fc); border-bottom: 1px solid var(--line); }
.back-link { display: inline-flex; align-items: center; gap: 7px; min-height: 44px; margin-bottom: 15px; color: var(--link); font-size: 0.84rem; font-weight: 700; }
.detail-grid { display: grid; grid-template-columns: 1fr 0.92fr; align-items: center; gap: clamp(25px, 5vw, 73px); }
.detail-intro h1 { margin-block: 10px 16px; font: 600 clamp(2.6rem, 5.15vw, 4.75rem)/1.09 var(--heading); letter-spacing: -0.048em; text-wrap: balance; }
.detail-lead { max-width: 560px; color: var(--muted); font-size: clamp(1rem, 1.55vw, 1.17rem); }
.detail-image { width: 100%; height: auto; aspect-ratio: 30 / 19; border-radius: 16px 16px 55px 16px; object-fit: cover; }
.detail-body { display: grid; grid-template-columns: minmax(0, 690px) minmax(240px, 1fr); gap: clamp(24px, 5.6vw, 80px); align-items: start; padding-block: 49px 71px; }
.prose { color: #354563; line-height: 1.78; }
.prose h2, .detail-next h2 { color: var(--ink); font: 600 clamp(1.6rem, 2.65vw, 2.23rem)/1.17 var(--heading); letter-spacing: -0.025em; }
.prose h2 { margin-bottom: 10px; }
.prose h2:not(:first-child) { margin-top: 26px; }
.prose p + p { margin-top: 12px; }
.prose a { color: var(--link); font-weight: 650; }
.prose ol { margin-block: 10px 19px; padding-inline-start: 1.4em; }
.prose li + li { margin-top: 8px; }
.prose blockquote { margin-block: 15px; padding: 13px 17px; border-left: 3px solid #3894cc; background: var(--pale); color: var(--navy); }
.prose .source-link { font-size: 0.86rem; }
.detail-next { padding: clamp(15px, 2.15vw, 27px); border: 1px solid var(--line); border-radius: 15px; background: var(--pale); }
.detail-next h2 { margin-bottom: 13px; }
.quick-links { margin: 0; padding: 0; list-style: none; }
.quick-links li + li { border-top: 1px solid #d5dfeb; }
.quick-links a { display: flex; align-items: center; justify-content: space-between; gap: 10px; padding-block: 12px; color: var(--link); text-decoration: none; }
.quick-links a strong { display: block; font-size: 0.88rem; }
.quick-links a span span { display: block; margin-top: 3px; color: var(--muted); font-size: 0.79rem; }
.quick-links a:hover strong { text-decoration: underline; }

@media (max-width: 1070px) {
  .shell { width: calc(100% - 72px); }
  .hero-inner { min-height: auto; }
  .hero-image { border-bottom-right-radius: 60px; }
  .disc-tabs { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .disc-tabs button { flex-direction: row; align-items: center; min-height: 45px; gap: 7px; }
}

@media (max-width: 800px) {
  .shell { width: calc(100% - 40px); }
  .hero-inner { grid-template-columns: 1fr; gap: 28px; padding-block: 37px 41px; }
  .hero h1 { font-size: clamp(2.5rem, 8.4vw, 4.9rem); margin-block: 13px 17px; text-wrap: initial; }
  .hero-actions { margin-top: 21px; }
  .hero-image { border-bottom-right-radius: 48px; }
  .hero-image img { aspect-ratio: 1.36; object-position: center 44%; }
  .section-intro { flex-direction: column; align-items: start; gap: 11px; margin-bottom: 24px; }
  .disc-grid { grid-template-columns: 1fr; }
  .disc-break { display: none; }
  .disc-tabs { grid-template-columns: repeat(4, minmax(0, 1fr)); }
  .disc-tabs button { flex-direction: column; align-items: start; }
  .detail-grid, .detail-body { grid-template-columns: 1fr; }
  .detail-header { padding-block: 17px 34px; }
  .detail-body { padding-block: 31px 49px; }
}

@media (max-width: 580px) {
  .header-inner { flex-direction: column; justify-content: center; align-items: stretch; gap: 0; padding-top: 11px; }
  .brand { align-self: center; }
  .brand img:first-child { width: 43px; }
  .brand img:last-child { width: 131px; }
  .main-nav { justify-content: space-between; gap: 4px 9px; }
  .main-nav a { min-height: 42px; font-size: 0.75rem; }
  .hero-inner { padding-top: 32px; }
  .hero-actions { gap: 8px; }
  .button { padding-inline: 12px; gap: 9px; font-size: 0.8rem; }
  .topic-grid, .audience-grid, .reading-grid { grid-template-columns: 1fr; }
  .card-image img, .audience-card .card-image img { aspect-ratio: 1.8; }
  .card-body { padding: 17px; }
  .disc-tabs { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .disc-tabs button { flex-direction: row; align-items: center; }
  .about-inner { grid-template-columns: 1fr; }
  .about-inner img { width: min(230px, 100%); }
  .footer-inner { flex-direction: column; align-items: flex-start; gap: 15px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .button, .card-link, .card-image img { transition: none; }
}