/* THE AI AND INDIA TRILOGY — shared styles
   Palette + type from the Claude Design handoff (see /chats/chat1.md). */

:root{
  --ivory:#F4F0E8;
  --ivory-alt:#EFEADE;
  --navy:#102A56;
  --midnight:#07172F;
  --charcoal:#11151B;
  --orange:#C94F18;
  --orange-deep:#A83D10;
  --white:#F7F7F4;
  --ink-muted:#4b4438;

  --font-display:'Playfair Display',Georgia,serif;
  --font-label:'Oswald',Arial,sans-serif;
  --font-body:'Source Serif 4',Georgia,serif;
}

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

html{scroll-behavior:smooth;}

body{
  margin:0;
  background:var(--ivory);
  color:var(--charcoal);
  font-family:var(--font-body);
  overflow-x:hidden;
}

img{max-width:100%;}

a{color:var(--orange);}
a:hover{color:var(--orange-deep);}

/* ---------- layout helpers ---------- */

.container{max-width:1180px;margin:0 auto;padding:0 48px;}
.container--narrow{max-width:900px;}
.container--tight{max-width:760px;}
.container--copy{max-width:840px;}
.container--evidence{max-width:1000px;}

.section{padding:110px 0;}
.section--sm{padding:80px 0;}
.section--lg{padding:130px 0;}
.section--xl{padding:140px 0;}

.bg-ivory{background:var(--ivory);}
.bg-ivory-alt{background:var(--ivory-alt);}
.bg-navy{background:var(--navy);color:var(--ivory);}
.bg-midnight{background:var(--midnight);color:var(--ivory);}
.bg-charcoal{background:var(--charcoal);color:rgba(244,240,232,0.6);}

.bg-dots-light{
  background-image:radial-gradient(rgba(16,42,86,0.07) 1px,transparent 1.4px);
  background-size:36px 36px;
}
.bg-dots-dark{
  background-image:radial-gradient(rgba(201,79,24,0.18) 1px,transparent 1.4px);
  background-size:30px 30px;
}

.text-center{text-align:center;}

/* ---------- type ---------- */

.eyebrow{
  font-family:var(--font-label);
  font-weight:600;
  font-size:12px;
  letter-spacing:0.25em;
  color:var(--orange);
  margin:0 0 16px;
}

.eyebrow--lg{font-size:13px;letter-spacing:0.28em;}

h1,h2,h3{font-family:var(--font-display);color:var(--navy);margin:0;}

.hero-title{
  font-weight:700;
  font-size:clamp(34px,5.2vw,66px);
  line-height:1.08;
  margin:0 0 20px;
}

.section-title{
  font-weight:700;
  font-size:clamp(28px,4vw,46px);
  margin:0 0 14px;
}

.section-title--md{font-size:clamp(26px,3.4vw,38px);}
.section-title--sm{font-size:clamp(24px,3.2vw,36px);}

.subhead{
  font-family:var(--font-label);
  font-size:14px;
  font-weight:500;
  letter-spacing:0.05em;
  color:var(--ink-muted);
}

.lede{
  font-family:var(--font-display);
  font-style:italic;
  line-height:1.5;
  color:var(--charcoal);
}

.on-dark .lede,
.bg-navy .lede,
.bg-midnight .lede{color:var(--ivory);}

/* ---------- buttons ---------- */

.btn{
  display:inline-block;
  font-family:var(--font-label);
  font-size:13px;
  font-weight:600;
  letter-spacing:0.1em;
  padding:16px 34px;
  text-decoration:none;
  border:1.5px solid transparent;
  cursor:pointer;
}
.btn--sm{font-size:12.5px;padding:15px 30px;}
.btn--nav{font-size:12px;padding:11px 22px;}

.btn-primary{background:var(--orange);color:var(--white);}
.btn-primary:hover{background:var(--orange-deep);color:var(--white);}

.btn-outline{background:transparent;color:var(--navy);border-color:var(--navy);}
.btn-outline:hover{background:var(--navy);color:var(--ivory);}

.btn-outline-light{background:transparent;color:var(--ivory);border-color:rgba(244,240,232,0.5);}
.btn-outline-light:hover{border-color:var(--ivory);}

.btn-link{
  font-family:var(--font-label);
  font-size:12.5px;
  font-weight:600;
  letter-spacing:0.1em;
  text-decoration:none;
  border-bottom:2px solid currentColor;
  padding-bottom:4px;
}

.button-row{display:flex;gap:18px;justify-content:center;flex-wrap:wrap;}

/* ---------- nav ---------- */

.site-nav{
  position:sticky;top:0;z-index:50;
  background:rgba(244,240,232,0.94);
  backdrop-filter:blur(6px);
  border-bottom:1px solid rgba(17,21,27,0.12);
}
.site-nav__bar{
  display:flex;align-items:center;justify-content:space-between;
  padding:18px 48px;
  gap:24px;
}
.site-nav__brand{
  font-family:var(--font-label);
  font-weight:600;
  font-size:15px;
  letter-spacing:0.12em;
  color:var(--navy);
  text-decoration:none;
  white-space:nowrap;
}
.site-nav__brand span{color:var(--orange);}

.site-nav__links{
  display:flex;gap:20px;
  font-family:var(--font-label);
  font-size:11px;font-weight:500;letter-spacing:0.08em;
  color:var(--charcoal);
  flex-wrap:nowrap;justify-content:center;
}
.site-nav__links a{text-decoration:none;color:inherit;}
.site-nav__links a.is-active{color:var(--orange);}

.site-nav__toggle{display:none;}

@media (max-width:900px){
  .site-nav__bar{padding:16px 24px;}
  .site-nav__links{
    display:none;
    position:absolute;
    top:100%;left:0;right:0;
    flex-direction:column;
    gap:0;
    background:var(--ivory);
    border-bottom:1px solid rgba(17,21,27,0.12);
    padding:8px 24px 20px;
  }
  .site-nav__links a{padding:10px 0;border-bottom:1px solid rgba(17,21,27,0.08);}
  .site-nav.is-open .site-nav__links{display:flex;}
  .site-nav__toggle{
    display:flex;flex-direction:column;gap:4px;
    background:none;border:none;cursor:pointer;padding:8px;
  }
  .site-nav__toggle span{width:22px;height:2px;background:var(--navy);display:block;}
  .site-nav__buy{display:none;}
}

/* ---------- hero book covers (home) ---------- */

.hero-covers{
  display:flex;justify-content:center;align-items:flex-end;
  margin-bottom:56px;
}
.hero-covers__item{
  display:block;position:relative;width:240px;
  transition:transform 0.25s ease,box-shadow 0.25s ease;
  border:1px solid rgba(7,23,47,0.15);
}
.hero-covers__item img{display:block;width:100%;height:auto;}

.hero-covers__item--1{
  margin:0 -14px 0 0;
  transform:rotate(-3deg) translateY(6px);
  box-shadow:0 18px 40px rgba(7,23,47,0.28);
  z-index:1;
}
.hero-covers__item--1:hover{
  transform:rotate(-3deg) translateY(-14px);
  box-shadow:0 28px 56px rgba(7,23,47,0.35);
  z-index:4;
}
.hero-covers__item--2{
  width:232px;
  transform:translateY(-16px);
  box-shadow:0 22px 48px rgba(7,23,47,0.32);
  z-index:2;
}
.hero-covers__item--2:hover{
  transform:translateY(-30px);
  box-shadow:0 32px 62px rgba(7,23,47,0.38);
  z-index:4;
}
.hero-covers__item--3{
  margin:0 0 0 -14px;
  transform:rotate(3deg) translateY(6px);
  box-shadow:0 18px 40px rgba(7,23,47,0.28);
  z-index:1;
}
.hero-covers__item--3:hover{
  transform:rotate(3deg) translateY(-14px);
  box-shadow:0 28px 56px rgba(7,23,47,0.35);
  z-index:4;
}

@media (max-width:640px){
  .hero-covers{flex-direction:column;align-items:center;gap:32px;}
  .hero-covers__item,
  .hero-covers__item--1,
  .hero-covers__item--2,
  .hero-covers__item--3{
    width:min(260px,70vw);margin:0;transform:none;
  }
  .hero-covers__item--1:hover,
  .hero-covers__item--2:hover,
  .hero-covers__item--3:hover{transform:translateY(-8px);}
}

/* ---------- progression arrows ---------- */

.progression{
  display:flex;align-items:center;justify-content:center;gap:20px;flex-wrap:wrap;
}
.progression__step{
  font-family:var(--font-label);font-weight:600;letter-spacing:0.08em;font-size:15px;
  color:var(--navy);border-bottom:3px solid var(--orange);padding-bottom:10px;
}
.progression__arrow{color:var(--orange);font-size:20px;}

.transition-row{
  display:flex;align-items:center;justify-content:center;gap:18px;flex-wrap:wrap;
  font-family:var(--font-label);font-weight:600;letter-spacing:0.08em;font-size:15px;
  color:var(--navy);
}
.transition-row .progression__arrow{font-size:16px;}

/* ---------- trilogy book rows ---------- */

.book-row{
  display:grid;grid-template-columns:280px 1fr;gap:56px;align-items:center;
  margin-bottom:96px;
}
.book-row:last-child{margin-bottom:0;}
.book-row--reverse .book-row__cover{order:2;}
.book-row--reverse .book-row__body{order:1;}

.book-row__cover{display:block;width:280px;box-shadow:0 20px 44px rgba(7,23,47,0.22);}
.book-row__cover img{display:block;width:100%;height:auto;}

.book-row__number{
  font-family:var(--font-label);font-size:12px;font-weight:600;letter-spacing:0.2em;
  color:var(--orange);margin:0 0 12px;
}
.book-row__title{font-weight:700;font-size:clamp(24px,3vw,34px);line-height:1.15;margin:0 0 10px;}
.book-row__subtitle{
  font-family:var(--font-label);font-size:13px;font-weight:500;letter-spacing:0.03em;
  color:var(--ink-muted);margin:0 0 24px;line-height:1.5;
}
.book-row__question{font-size:19px;margin:0 0 24px;}

.theme-tags{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:28px;}
.theme-tag{
  font-family:var(--font-label);font-size:11px;font-weight:500;letter-spacing:0.06em;
  color:var(--navy);border:1px solid rgba(16,42,86,0.3);padding:6px 12px;
}

@media (max-width:800px){
  .book-row,
  .book-row--reverse{grid-template-columns:1fr;gap:32px;}
  .book-row--reverse .book-row__cover,
  .book-row--reverse .book-row__body{order:initial;}
  .book-row__cover{width:100%;max-width:280px;margin:0 auto;}
}

/* ---------- three-books progression (dark) ---------- */

.trans-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:0;}
.trans-grid__col{padding:0 24px;border-right:1px solid rgba(244,240,232,0.2);}
.trans-grid__col:last-child{border-right:none;}
.trans-grid__num{font-family:var(--font-label);font-size:13px;color:var(--orange);letter-spacing:0.15em;margin-bottom:8px;}
.trans-grid__title{font-family:var(--font-display);font-size:24px;font-weight:700;margin-bottom:20px;}
.trans-grid__list{font-family:var(--font-label);font-size:13px;letter-spacing:0.04em;line-height:2;color:rgba(244,240,232,0.85);}

@media (max-width:700px){
  .trans-grid{grid-template-columns:1fr;gap:48px;}
  .trans-grid__col{border-right:none;text-align:center;}
}

/* ---------- map / tabs ---------- */

.map-tabs{display:flex;justify-content:center;gap:12px;margin-bottom:48px;flex-wrap:wrap;}
.map-tab{
  font-family:var(--font-label);font-size:12px;font-weight:600;letter-spacing:0.1em;
  padding:12px 24px;border:1px solid rgba(16,42,86,0.3);background:transparent;color:var(--navy);
  cursor:pointer;
}
.map-tab.is-active{border-color:var(--orange);background:var(--orange);color:var(--white);}

.map-panel{
  position:relative;background:#0d1f3d;padding:64px 40px;
  display:flex;align-items:center;justify-content:center;min-height:340px;
}
.map-panel__inner{max-width:560px;}
.map-panel__label{font-family:var(--font-label);font-size:13px;letter-spacing:0.15em;color:var(--orange);margin-bottom:14px;}
.map-panel__desc{font-family:var(--font-display);font-size:clamp(20px,2.6vw,28px);color:var(--ivory);line-height:1.5;margin:0;}

/* ---------- big question ---------- */

.question-list{display:flex;flex-direction:column;gap:18px;max-width:520px;margin:0 auto;}
.question-list__item{
  font-family:var(--font-label);font-size:16px;letter-spacing:0.04em;color:rgba(244,240,232,0.9);
  padding-bottom:18px;border-bottom:1px solid rgba(201,79,24,0.4);
}
.question-list__item--final{color:var(--orange);border-bottom:none;}

/* ---------- argument grid ---------- */

.argument-grid{
  display:grid;grid-template-columns:repeat(2,1fr);gap:20px;max-width:640px;margin:0 auto;text-align:left;
}
.argument-grid__item{
  font-family:var(--font-label);font-size:15px;letter-spacing:0.03em;color:var(--navy);
  border-left:3px solid var(--orange);padding-left:16px;
}
@media (max-width:560px){.argument-grid{grid-template-columns:1fr;}}

/* ---------- journal / articles ---------- */

.article-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:36px;}
.article-card{background:var(--ivory);padding:36px 32px;border-top:3px solid var(--orange);}
.article-card__cat{
  font-family:var(--font-label);font-size:11px;font-weight:600;letter-spacing:0.15em;
  color:var(--orange);margin-bottom:14px;
}
.article-card__title{font-weight:700;font-size:22px;margin:0 0 14px;line-height:1.3;}
.article-card__excerpt{font-size:15px;line-height:1.6;color:var(--ink-muted);margin:0 0 22px;}
.article-card__status{
  font-family:var(--font-label);font-size:11.5px;font-weight:600;letter-spacing:0.08em;color:var(--navy);
}

/* ---------- footer ---------- */

.site-footer{
  padding:36px 48px;background:var(--charcoal);color:rgba(244,240,232,0.6);text-align:center;
  font-family:var(--font-label);font-size:11.5px;letter-spacing:0.08em;
}

/* ---------- book detail pages ---------- */

.book-hero{
  display:grid;grid-template-columns:340px 1fr;gap:72px;align-items:center;
}
.book-hero__cover{width:100%;height:auto;box-shadow:0 26px 56px rgba(7,23,47,0.3);}
.book-hero__kicker{
  font-family:var(--font-label);font-size:12px;font-weight:600;letter-spacing:0.25em;color:var(--orange);margin:0 0 18px;
}
.book-hero__title{font-weight:700;font-size:clamp(30px,4.2vw,52px);line-height:1.1;margin:0 0 18px;}
.book-hero__subtitle{
  font-family:var(--font-label);font-size:14px;font-weight:500;letter-spacing:0.04em;color:var(--ink-muted);
  margin:0 0 32px;line-height:1.6;
}
.book-hero__question{font-size:24px;color:var(--navy);line-height:1.5;margin:0 0 40px;}

@media (max-width:800px){
  .book-hero{grid-template-columns:1fr;gap:40px;text-align:center;}
  .book-hero__cover{max-width:300px;margin:0 auto;}
  .book-hero .button-row{justify-content:center;}
}

.theme-block{border-top:3px solid var(--orange);padding:24px 0 0;}
.theme-block__name{
  font-family:var(--font-label);font-weight:600;font-size:15px;letter-spacing:0.06em;color:var(--navy);margin-bottom:10px;
}
.theme-block__copy{font-size:14.5px;line-height:1.6;color:var(--ink-muted);margin:0;}
.theme-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:36px;}

.theme-simple{border-top:3px solid var(--orange);padding:20px 0 0;}
.theme-simple__name{font-family:var(--font-label);font-weight:600;font-size:14px;letter-spacing:0.06em;color:var(--navy);}
.theme-simple-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:32px;}

.evidence-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:40px;}
.evidence-col__label{
  font-family:var(--font-label);font-size:12px;letter-spacing:0.1em;color:rgba(244,240,232,0.7);margin-bottom:14px;
}
.bar-chart{display:flex;align-items:flex-end;gap:8px;height:120px;}
.bar-chart__bar{flex:1;background:var(--orange);}
.evidence-note{
  font-family:var(--font-label);font-size:12px;letter-spacing:0.05em;color:rgba(244,240,232,0.5);
  text-align:center;margin-top:36px;
}
@media (max-width:700px){.evidence-grid{grid-template-columns:1fr;gap:56px;}}

.institution-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:32px;}
.institution-card{padding:28px 16px;border:1px solid rgba(244,240,232,0.2);}
.institution-card__title{font-family:var(--font-display);font-weight:700;font-size:19px;margin-bottom:10px;}
.institution-card__copy{font-size:13.5px;line-height:1.5;color:rgba(244,240,232,0.75);margin:0;}

.access-split{display:grid;grid-template-columns:1fr 1fr;}
.access-split__panel{padding:90px 56px;}
.access-split__kicker{
  font-family:var(--font-label);font-size:12px;font-weight:600;letter-spacing:0.2em;color:var(--orange);margin:0 0 18px;
}
.access-split__copy{font-size:22px;line-height:1.5;margin:0;}
@media (max-width:800px){
  .access-split{grid-template-columns:1fr;}
  .access-split__panel{padding:56px 32px;}
}