/* ==========================================================================
   SENAN MAHON — Author website (v2)
   Design: dark cinematic sci-fi, following the v2 mockup.
   Fonts: Montserrat (headings) + Inter (body) via Google Fonts.
   ========================================================================== */

:root {
  /* Measured from mockup-homepage-v1.png / v2-mobile.png */
  --bg-0: #050f1a;            /* deepest: page / footer */
  --bg-1: #000914;            /* nav bar */
  --bg-2: #091622;            /* section panels (feature) */
  --bg-3: #0c1c2c;            /* cards / button fill */
  --bg-4: #10233a;            /* hover fills */
  --line: #1b2f45;            /* borders / dividers */
  --line-soft: rgba(122, 158, 190, 0.16);
  --text: #e9edf1;            /* headings / primary */
  --body: #b3c5d4;            /* body copy (blue-grey) */
  --muted: #7d93a8;           /* secondary text */
  --sub: #8fb4cc;             /* subtitle / "Book N of the Gelvan Saga" chip */
  --gold: #d0a862;            /* Amazon logo / accent */
  --gold-soft: rgba(208, 168, 98, 0.16);
  --glow: rgba(120, 170, 215, 0.10);

  --font-head: 'Montserrat', 'Segoe UI', Helvetica, Arial, sans-serif;
  --font-body: 'Inter', 'Segoe UI', Helvetica, Arial, sans-serif;

  --nav-h: 4.25rem;
  --wrap: 1180px;
  --radius: 6px;
  --ease: cubic-bezier(.22, .61, .36, 1);
}

/* ---------- Reset / base ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

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

body {
  font-family: var(--font-body);
  font-size: 1.0625rem;
  line-height: 1.7;
  color: var(--body);
  background-color: var(--bg-0);
  background-image:
    radial-gradient(1200px 600px at 85% -10%, rgba(60, 110, 160, 0.10), transparent 60%),
    radial-gradient(900px 500px at -10% 30%, rgba(40, 80, 130, 0.08), transparent 55%);
  background-attachment: fixed;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

img { max-width: 100%; display: block; }
a { color: var(--sub); text-decoration: none; transition: color .2s var(--ease); }
a:hover { color: var(--text); }

::selection { background: rgba(201, 161, 95, .35); color: #fff; }

.skip-link {
  position: absolute; left: -9999px; top: 0;
  background: var(--bg-3); color: var(--text);
  padding: .6rem 1rem; z-index: 200; border-radius: 0 0 6px 0;
}
.skip-link:focus { left: 0; color: #fff; }

:focus-visible { outline: 2px solid var(--gold); outline-offset: 3px; border-radius: 2px; }

/* ---------- Typography ---------- */
h1, h2, h3, .h1, .h2, .h3 {
  font-family: var(--font-head);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: .13em;
  color: var(--text);
  line-height: 1.15;
}

.eyebrow {
  font-family: var(--font-head);
  font-size: .78rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .34em;
  color: var(--sub);
  display: block;
  margin-bottom: 1rem;
}

.series-chip {
  display: inline-flex;
  align-items: center;
  gap: .55rem;
  font-family: var(--font-head);
  font-size: .74rem;
  font-weight: 600;
  letter-spacing: .26em;
  text-transform: uppercase;
  color: var(--sub);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: .42rem .95rem;
  margin: 1.1rem 0 1.4rem;
  background: rgba(10, 24, 40, .55);
}
.series-chip::before {
  content: '';
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--gold);
  box-shadow: 0 0 8px rgba(201, 161, 95, .8);
}

.lead { font-size: 1.14rem; color: #c3d2df; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .7rem;
  font-family: var(--font-head);
  font-size: .8rem;
  font-weight: 600;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--text);
  background: rgba(12, 28, 44, .55);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: .95rem 1.6rem;
  cursor: pointer;
  transition: border-color .25s var(--ease), color .25s var(--ease),
              background .25s var(--ease), transform .25s var(--ease),
              box-shadow .25s var(--ease);
}
.btn:hover { color: var(--gold); border-color: var(--gold); background: rgba(201, 161, 95, .08); }
.btn:active { transform: translateY(1px); }
.btn svg { width: 1.35rem; height: 1.35rem; fill: var(--gold); flex: none; }

.btn-row { display: flex; flex-wrap: wrap; gap: .9rem; margin-top: 1.8rem; }

.text-link {
  display: inline-flex;
  align-items: center;
  gap: .45rem;
  font-family: var(--font-head);
  font-size: .78rem;
  font-weight: 600;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--sub);
  border-bottom: 1px solid transparent;
  padding-bottom: 2px;
}
.text-link:hover { color: var(--gold); border-bottom-color: var(--gold); }
.text-link svg { width: 1.05rem; height: 1.05rem; fill: currentColor; }

/* ---------- Header / nav ---------- */
.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 100;
  height: var(--nav-h);
  display: flex;
  align-items: center;
  background: linear-gradient(180deg, rgba(0, 5, 12, .82), rgba(0, 5, 12, .35) 70%, transparent);
  border-bottom: 1px solid rgba(158, 195, 230, .4);
  transition: background .3s var(--ease), box-shadow .3s var(--ease);
}
.site-header.scrolled {
  background: rgba(3, 10, 19, .94);
  box-shadow: 0 10px 30px rgba(0, 0, 0, .35);
}
.nav-inner {
  width: min(var(--wrap), 92vw);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}
.brand {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 1.02rem;
  letter-spacing: .3em;
  color: var(--text);
  white-space: nowrap;
}
.brand:hover { color: var(--gold); }

/* Full-screen overlay menu — used at every layout width (hamburger always visible) */
.nav-links {
  position: fixed; inset: 0; z-index: 120;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: .5rem;
  list-style: none;
  background: rgba(3, 9, 17, .97);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  opacity: 0; visibility: hidden;
  transition: opacity .3s var(--ease), visibility .3s;
}
.nav-open .nav-links { opacity: 1; visibility: visible; }
.nav-links a {
  display: block;
  font-family: var(--font-head);
  font-size: 1.02rem;
  font-weight: 600;
  letter-spacing: .3em;
  text-transform: uppercase;
  text-align: center;
  color: #c9d6e2;
  padding: 1rem 1.6rem;
  border-radius: 4px;
}
.nav-links a:hover { color: var(--text); background: rgba(255, 255, 255, .05); }
.nav-links a[aria-current="page"] { color: var(--gold); }

/* Hamburger */
.nav-toggle {
  display: block;
  background: none; border: 0; cursor: pointer;
  width: 2.6rem; height: 2.6rem;
  position: relative;
  z-index: 130;
}
.nav-toggle span {
  position: absolute; left: .55rem; right: .55rem;
  height: 2px; background: var(--text);
  border-radius: 2px;
  transition: transform .3s var(--ease), opacity .2s;
}
.nav-toggle span:nth-child(1) { top: .8rem; }
.nav-toggle span:nth-child(2) { top: 1.29rem; }
.nav-toggle span:nth-child(3) { top: 1.78rem; }
.nav-open .nav-toggle span:nth-child(1) { transform: translateY(.49rem) rotate(45deg); }
.nav-open .nav-toggle span:nth-child(2) { opacity: 0; }
.nav-open .nav-toggle span:nth-child(3) { transform: translateY(-.49rem) rotate(-45deg); }

/* ---------- Hero (home) ---------- */
.hero {
  position: relative;
  min-height: 100svh;
  display: flex;
  align-items: center;
  padding: calc(var(--nav-h) + 2rem) 0 4rem;
  overflow: hidden;
  border-bottom: 1px solid rgba(174, 208, 238, .7);
}
.hero__bg {
  position: absolute; inset: 0; z-index: -2;
  background: url('../images26/hero-cityscape.jpg') center 32% / cover no-repeat;
}
.hero::before {
  content: '';
  position: absolute; inset: 0; z-index: -1;
  background:
    linear-gradient(90deg, rgba(2, 8, 16, .88) 0%, rgba(2, 8, 16, .62) 34%, rgba(2, 8, 16, .18) 68%, rgba(2, 8, 16, .35) 100%),
    linear-gradient(180deg, rgba(2, 8, 16, .55) 0%, transparent 30%, transparent 72%, rgba(5, 15, 26, .92) 100%);
}
.hero__inner { width: min(var(--wrap), 92vw); margin: 0 auto; }
.hero h1 {
  font-size: clamp(2.7rem, 8.5vw, 5.2rem);
  font-weight: 300;
  letter-spacing: .2em;
  line-height: 1.05;
  text-shadow: 0 4px 30px rgba(0, 0, 0, .55);
}
.hero h1 .line { display: block; }
.hero__divider {
  width: 4.5rem; height: 1px;
  background: linear-gradient(90deg, var(--gold), transparent);
  margin: 1.6rem 0 1.4rem;
}
.hero__sub {
  font-family: var(--font-head);
  font-size: clamp(.8rem, 2vw, .95rem);
  font-weight: 600;
  letter-spacing: .4em;
  text-transform: uppercase;
  color: var(--sub);
  margin-bottom: 1.6rem;
}
.hero__bio { max-width: 34rem; font-size: 1.06rem; color: #c0cfdd; }
.hero__actions { margin-top: 2.2rem; display: flex; gap: .9rem; flex-wrap: wrap; }
.hero__actions .btn { border-color: rgba(143, 180, 204, .6); }

/* ---------- Page hero (inner pages: scaled-down imagery) ---------- */
.page-hero {
  position: relative;
  display: flex;
  align-items: flex-end;
  min-height: clamp(300px, 40vw, 400px);
  padding: calc(var(--nav-h) + 2.2rem) 0 2.6rem;
  overflow: hidden;
  background: url('../images26/banner-cityscape.jpg') center 30% / cover no-repeat;
}
.page-hero::before {
  content: '';
  position: absolute; inset: 0;
  background:
    linear-gradient(180deg, rgba(2, 8, 16, .66) 0%, rgba(2, 8, 16, .38) 40%, #050f1a 92%),
    linear-gradient(90deg, rgba(2, 8, 16, .55), transparent 70%);
}
.page-hero__inner { width: min(var(--wrap), 92vw); margin: 0 auto; position: relative; }
.page-hero h1 { font-size: clamp(1.9rem, 5.4vw, 3.3rem); letter-spacing: .18em; }
.page-hero .page-kicker {
  font-family: var(--font-head);
  font-size: .72rem; font-weight: 600; letter-spacing: .4em; text-transform: uppercase;
  color: var(--gold); margin-bottom: .8rem;
}

/* ---------- Section shells ---------- */
.section { padding: 5.2rem 0; }
.section--alt { background: var(--bg-2); position: relative; }
.section--alt::before {
  content: '';
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(130, 175, 215, .05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(130, 175, 215, .05) 1px, transparent 1px);
  background-size: 46px 46px;
  pointer-events: none;
}
.wrap { width: min(var(--wrap), 92vw); margin: 0 auto; position: relative; }

.section-head { text-align: center; margin-bottom: 3.2rem; }
.section-head h2 { font-size: clamp(1.5rem, 4vw, 2.3rem); letter-spacing: .2em; }
.section-head .eyebrow { margin-bottom: .9rem; }

/* ---------- Featured book (home) ---------- */
.feature-grid {
  display: grid;
  grid-template-columns: minmax(240px, 360px) 1fr;
  gap: clamp(2.5rem, 6vw, 5.5rem);
  align-items: center;
}
.feature-copy h2 { font-size: clamp(1.55rem, 4vw, 2.5rem); letter-spacing: .14em; line-height: 1.12; }
.feature-copy .series-chip { margin-top: 1rem; }
.feature-copy p { margin-bottom: 1.15rem; }
.feature-copy .goodreads-link { margin-top: .6rem; }

/* 3D hardcover presentation: front cover + spine + page block (preserve-3d) */
.book {
  position: relative;
  z-index: 0;
  width: min(320px, 72vw);
  margin: 0 auto;
  aspect-ratio: 2 / 3;
  perspective: 1500px;
}
/* covers with a 5:8 (1:1.6) print ratio — keep them uncropped */
.book--tall { aspect-ratio: 5 / 8; }
.book__inner {
  position: absolute; inset: 0;
  transform-style: preserve-3d;
  transform: rotateY(-24deg);
}
.book__cover {
  position: absolute; inset: 0;
  border-radius: 2px 8px 8px 2px;
  overflow: hidden;
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, .07);
}
.book__cover img { width: 100%; height: 100%; object-fit: cover; display: block; }
/* spine — perpendicular plane at the cover's left edge */
.book__spine {
  position: absolute; top: 0; left: 0; bottom: 0;
  width: 14px;
  transform: rotateY(90deg);
  transform-origin: left center;
  background: linear-gradient(90deg, #05070d, #111b29 60%, #0b131f);
  border-radius: 4px 0 0 4px;
}
/* page block — perpendicular plane at the cover's right edge */
.book__pages {
  position: absolute; top: 0; right: 0; bottom: 0;
  width: 14px;
  transform: rotateY(-90deg);
  transform-origin: right center;
  background: linear-gradient(90deg, #1a2532, #2b3d50 55%, #223140);
  border-radius: 0 4px 4px 0;
}
/* soft ground shadow under the tilted book */
.book::after {
  content: '';
  position: absolute;
  left: 0; right: -8%; bottom: -11%;
  height: 10%;
  background: radial-gradient(50% 50% at 50% 50%, rgba(0, 0, 0, .6), transparent 72%);
  filter: blur(7px);
  z-index: -1;
}
.book__glow {
  position: absolute; inset: -18% -20% -12% -20%; z-index: -1;
  background: radial-gradient(50% 50% at 50% 50%, rgba(120, 160, 210, .22), transparent 70%);
}

/* ---------- Library strip (home) ---------- */
.library-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2.2rem;
}
.book-card {
  display: flex; flex-direction: column;
  background: rgba(10, 22, 36, .6);
  border: 1px solid var(--line-soft);
  border-radius: 10px;
  padding: 1.9rem 1.7rem 1.7rem;
  transition: transform .35s var(--ease), border-color .35s var(--ease), box-shadow .35s var(--ease);
}
.book-card:hover {
  border-color: rgba(208, 168, 98, .45);
  box-shadow: 0 22px 44px -18px rgba(0, 0, 0, .65);
}
.book-card__cover {
  width: 74%;
  margin: 0 auto 1.5rem;
  /* middle ground between the 2:3 and 5:8 covers so neither is distorted much */
  aspect-ratio: 20 / 31;
  border-radius: 3px 8px 8px 3px;
  overflow: hidden;
  box-shadow: 0 16px 30px -12px rgba(0, 0, 0, .7), inset 0 0 0 1px rgba(255,255,255,.05);
}
/* the Arithmetic cover is 2:3; stretch it slightly so all card covers line up */
.book-card__cover--stretch img { object-fit: fill; }
.book-card__cover img { width: 100%; height: 100%; object-fit: cover; }
.book-card h3 { font-size: 1.02rem; letter-spacing: .16em; text-align: center; }
.book-card .book-card__meta {
  text-align: center;
  font-size: .8rem; letter-spacing: .16em; text-transform: uppercase;
  color: var(--muted);
  margin: .5rem 0 1rem;
  font-family: var(--font-head);
}
.book-card .book-card__link {
  margin-top: auto; text-align: center;
  padding-top: 1.1rem; border-top: 1px solid var(--line-soft);
}

/* ---------- Book pages ---------- */
.book-page-grid {
  display: grid;
  grid-template-columns: minmax(220px, 300px) 1fr;
  gap: clamp(2.4rem, 5.5vw, 4.5rem);
  align-items: start;
}
.book-page-grid > *, .about-grid > * { min-width: 0; }
.book-page-grid .book {
  width: min(280px, 100%);
  position: sticky;
  top: calc(var(--nav-h) + 2rem);
}
.book-page h1 { font-size: clamp(1.8rem, 4.6vw, 2.8rem); letter-spacing: .16em; line-height: 1.1; }
.book-tagline {
  font-family: var(--font-head);
  font-size: .85rem; font-weight: 600;
  letter-spacing: .3em; text-transform: uppercase;
  color: var(--gold);
  margin-top: 1.1rem;
}
.book-page .series-chip { margin-top: 1rem; }
.book-page-grid p { margin-bottom: 1.2rem; }
.book-meta-row {
  display: flex; flex-wrap: wrap; gap: .5rem 1.8rem;
  margin-top: 1.6rem; padding-top: 1.4rem;
  border-top: 1px solid var(--line-soft);
  font-family: var(--font-head);
  font-size: .74rem; letter-spacing: .2em; text-transform: uppercase;
  color: var(--muted);
}
.book-meta-row strong { color: var(--sub); font-weight: 600; }

.review-note {
  margin-top: 2.6rem;
  padding: 1.5rem 1.7rem;
  border: 1px dashed var(--line);
  border-radius: var(--radius);
  background: rgba(10, 22, 36, .45);
}
.review-note h3 { font-size: .95rem; letter-spacing: .24em; margin-bottom: .7rem; }
.review-note p { margin-bottom: .4rem; font-size: .98rem; }
.review-note a { color: var(--gold); border-bottom: 1px solid rgba(201,161,95,.4); }
.review-note a:hover { color: #e8c98f; border-bottom-color: #e8c98f; }

/* ---------- About ---------- */
.about-grid {
  display: grid;
  grid-template-columns: minmax(230px, 300px) 1fr;
  gap: clamp(2.4rem, 5.5vw, 4.5rem);
  align-items: start;
}
.about-photo {
  position: sticky; top: calc(var(--nav-h) + 2rem);
  text-align: center;
}
.about-photo img {
  width: 100%;
  border-radius: 50%;
  box-shadow: 0 26px 54px -22px rgba(0, 0, 0, .7);
}
.about-photo figcaption {
  margin-top: 1rem; font-size: .8rem; letter-spacing: .18em;
  text-transform: uppercase; color: var(--muted);
  font-family: var(--font-head);
}
.about-body h2 {
  font-size: 1.05rem; letter-spacing: .22em;
  margin: 2.1rem 0 1rem;
}
.about-body p { margin-bottom: 1.15rem; }
.about-body a { color: var(--gold); border-bottom: 1px solid rgba(201,161,95,.4); }
.about-body a:hover { color: #e8c98f; border-bottom-color: #e8c98f; }
.about-signoff {
  margin-top: 2rem;
  font-family: var(--font-head); font-size: 1rem; letter-spacing: .24em;
  text-transform: uppercase; color: var(--sub);
}
.about-socials { display: flex; flex-wrap: wrap; gap: .9rem; margin-top: 2.2rem; }
.about-socials a {
  display: inline-flex; align-items: center; gap: .6rem;
  font-family: var(--font-head); font-size: .74rem; font-weight: 600;
  letter-spacing: .22em; text-transform: uppercase;
  color: var(--body);
  border: 1px solid var(--line); border-radius: 999px;
  padding: .6rem 1.15rem;
  transition: border-color .25s var(--ease), color .25s var(--ease);
}
.about-socials a:hover { color: var(--gold); border-color: var(--gold); }
.about-socials svg { width: 1rem; height: 1rem; fill: currentColor; }

/* ---------- Contact ---------- */
.contact-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.6rem;
  margin-top: 2.6rem;
}
.contact-card {
  display: flex; flex-direction: column; align-items: center; text-align: center;
  background: rgba(10, 22, 36, .6);
  border: 1px solid var(--line-soft);
  border-radius: 10px;
  padding: 2.4rem 1.6rem 2rem;
  transition: transform .35s var(--ease), border-color .35s var(--ease);
}
.contact-card:hover { transform: translateY(-5px); border-color: rgba(201, 161, 95, .45); }
.contact-card .icon-badge {
  width: 3.4rem; height: 3.4rem;
  border-radius: 50%;
  display: grid; place-items: center;
  background: rgba(120, 160, 210, .08);
  border: 1px solid var(--line);
  margin-bottom: 1.4rem;
}
.contact-card .icon-badge svg { width: 1.5rem; height: 1.5rem; fill: var(--sub); }
.contact-card:hover .icon-badge svg { fill: var(--gold); }
.contact-card h3 { font-size: .95rem; letter-spacing: .24em; margin-bottom: .8rem; }
.contact-card p { font-size: .96rem; margin-bottom: 1.3rem; }
.contact-card .btn { width: 100%; margin-top: auto; }
.email-display {
  font-family: var(--font-head);
  font-size: .92rem; letter-spacing: .14em;
  color: var(--text);
  background: rgba(6, 16, 28, .8);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: .8rem 1rem;
  width: 100%;
  margin-bottom: .9rem;
  text-align: center;
  word-break: break-all;
  user-select: all;
}

/* ---------- Legal / prose ---------- */
.prose { max-width: 46rem; margin: 0 auto; }
.prose h2 {
  font-size: .95rem; letter-spacing: .26em;
  margin: 2.6rem 0 1.1rem;
  color: var(--sub);
}
.prose h2:first-child { margin-top: 0; }
.prose p { margin-bottom: 1.15rem; }
.prose a { color: var(--gold); border-bottom: 1px solid rgba(201,161,95,.4); }
.prose a:hover { color: #e8c98f; }

/* ---------- Footer ---------- */
.site-footer {
  /* matches the mockup footer's own background (#05101a) so the clipped
     orbital art blends in exactly as it does in the mockup */
  background: #05101a;
  border-top: 1px solid rgba(174, 208, 238, .7);
  padding: 3rem 0 2.4rem;
  margin-top: 2rem;
}
.footer-inner {
  width: min(var(--wrap), 92vw);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 1.6rem;
}
/* the orbital art is displayed at native 1:1 resolution — any downscaling
   thins/dims the fine lines and makes it look different from the mockup */
.footer-orbit { width: 310px; height: 176px; display: flex; align-items: center; justify-content: center; }
.footer-orbit img { height: 170px; width: auto; }
.footer-links {
  display: flex; align-items: center; gap: .4rem;
  list-style: none; justify-content: center; flex-wrap: wrap;
}
.footer-links a {
  font-family: var(--font-head);
  font-size: .72rem; font-weight: 600; letter-spacing: .22em; text-transform: uppercase;
  color: var(--muted);
  padding: .5rem .7rem;
}
.footer-links li + li { position: relative; }
.footer-links li + li::before {
  content: '';
  position: absolute; left: -.2rem; top: 50%; transform: translateY(-50%);
  width: 1px; height: 12px; background: var(--line);
}
.footer-links a:hover { color: var(--gold); }
.footer-links .external::after {
  content: '↗';
  margin-left: .35rem;
  font-size: .72rem;
}
.footer-copy {
  text-align: right;
  font-family: var(--font-head);
  font-size: .7rem; letter-spacing: .22em; text-transform: uppercase;
  color: var(--muted);
}

/* ---------- 404 ---------- */
.error-wrap { min-height: 70vh; display: grid; place-items: center; text-align: center; padding: 8rem 1rem 4rem; }
.error-wrap h1 { font-size: clamp(2rem, 6vw, 3.4rem); letter-spacing: .2em; }
.error-wrap p { margin: 1.2rem 0 2rem; color: var(--muted); }

/* ---------- Responsive ---------- */
@media (max-width: 980px) {
  .library-grid { grid-template-columns: 1fr; max-width: 420px; margin: 0 auto; }
  .contact-grid { grid-template-columns: 1fr; max-width: 460px; margin-left: auto; margin-right: auto; }
  .footer-inner { grid-template-columns: 1fr; text-align: center; gap: 1.2rem; position: relative; z-index: 1; }
  .footer-copy { text-align: center; }
  /* the orbital art becomes a centred watermark behind the footer text */
  .site-footer { position: relative; overflow: hidden; }
  .footer-orbit {
    position: absolute; left: 50%; top: 50%;
    transform: translate(-50%, -50%);
    width: auto; height: auto;
    opacity: .55;
    z-index: 0;
    pointer-events: none;
  }
  .footer-orbit img { height: 104px; }
  .book-page-grid, .about-grid { grid-template-columns: 1fr; }
  .book-page-grid .book, .about-photo { position: static; width: min(260px, 60vw); }
  .about-photo { margin: 0 auto; }
}

@media (max-width: 760px) {
  body { font-size: 1rem; }

  .feature-grid { grid-template-columns: 1fr; }
  .feature-grid .book { order: -1; width: min(300px, 62vw); margin-bottom: 1rem; }
  .feature-copy { text-align: left; }
  .btn-row .btn { flex: 1 1 100%; }

  .hero { min-height: 92svh; }
  .hero h1 { letter-spacing: .12em; }
  .hero__actions .btn { flex: 1 1 100%; }

  .section { padding: 3.8rem 0; }
  .book-page-grid .book, .about-photo { width: min(240px, 58vw); }
  .book-meta-row { flex-direction: column; gap: .35rem; }
}

@media (max-width: 420px) {
  .brand { letter-spacing: .2em; font-size: .92rem; }
  .hero h1 { font-size: clamp(2.2rem, 11vw, 3rem); }
}

/* ---------- Motion preferences ---------- */
body.nav-open { overflow: hidden; }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: .01ms !important;
    transition-duration: .01ms !important;
    scroll-behavior: auto !important;
  }
}