:root {
  --navy: #071b33;
  --navy-2: #0d2c4d;
  --blue: #155b8f;
  --orange: #f26a1b;
  --gold: #c9983d;
  --gold-light: #e4c77d;
  --charcoal: #2c333a;
  --ink: #17202a;
  --muted: #68727e;
  --light: #f4f6f8;
  --white: #ffffff;
  --border: #dfe4e8;
  --shadow: 0 18px 45px rgba(7, 27, 51, 0.10);
  --container: 1180px;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html { scroll-behavior: smooth; }

body {
  background: var(--light);
  color: var(--ink);
  font-family: Arial, Helvetica, sans-serif;
  line-height: 1.65;
}

a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }

.container {
  width: min(calc(100% - 40px), var(--container));
  margin-inline: auto;
}

.narrow { max-width: 820px; text-align: center; }
.section-space { padding: 88px 0; }

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* Header */
.site-header {
  min-height: 82px;
  background: var(--navy);
  color: var(--white);
  display: flex;
  align-items: center;
  padding: 0 32px;
  gap: 28px;
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.15);
  border-bottom: 2px solid var(--gold);
}

.logo img { height: 54px; width: auto; }

.primary-nav {
  display: flex;
  align-items: center;
  gap: 24px;
  margin-left: auto;
  font-size: 12px;
  text-transform: uppercase;
  font-weight: 700;
  letter-spacing: .025em;
}

.primary-nav a { transition: color .2s ease; }
.primary-nav a:hover,
.primary-nav a.active { color: var(--gold-light); }

.contact-btn {
  background: var(--orange);
  color: var(--white);
  padding: 14px 22px;
  border-radius: 5px;
  font-weight: 800;
  text-transform: uppercase;
  font-size: 12px;
  flex-shrink: 0;
  transition: transform .2s ease, background .2s ease;
}

.contact-btn:hover { background: #d95b13; transform: translateY(-2px); }

.menu-toggle {
  display: none;
  background: transparent;
  border: 0;
  cursor: pointer;
  margin-left: auto;
}

.menu-toggle > span:not(.sr-only) {
  width: 26px;
  height: 2px;
  background: var(--white);
  display: block;
  margin: 5px 0;
}

/* Hero */
.hero {
  background:
    linear-gradient(105deg, rgba(7, 27, 51, .97), rgba(13, 44, 77, .88)),
    url("images/books-hero.png") center / cover no-repeat;
  color: var(--white);
  padding: 118px 0;
}

.hero-content { max-width: 820px; }

.eyebrow,
.section-kicker,
.book-label {
  color: var(--gold);
  text-transform: uppercase;
  letter-spacing: 1.7px;
  font-size: .77rem;
  font-weight: 800;
  margin-bottom: 13px;
}

.hero h1 {
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(2.7rem, 5.7vw, 5rem);
  line-height: 1.05;
  letter-spacing: -.035em;
  margin-bottom: 24px;
}

.hero p:last-child {
  max-width: 740px;
  font-size: 1.18rem;
  color: rgba(255,255,255,.82);
}

.release-banner { background: var(--gold); color: var(--navy); }
.release-banner-inner {
  min-height: 58px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  font-size: .94rem;
}
.release-dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--orange);
  display: inline-block;
  margin-right: 9px;
  box-shadow: 0 0 0 5px rgba(242,106,27,.16);
}
.release-date { font-weight: 800; white-space: nowrap; }

/* Intro */
.intro { background: var(--white); }
.intro h2,
.section-heading h2,
.featured-copy h2 {
  color: var(--navy);
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(2.1rem, 4vw, 3.35rem);
  line-height: 1.15;
  letter-spacing: -.025em;
}
.intro p:last-child { color: var(--muted); font-size: 1.08rem; margin-top: 20px; }

/* Featured book */
.current-release { padding: 84px 0; background: var(--navy); }
.featured-book {
  display: grid;
  grid-template-columns: minmax(270px, 390px) 1fr;
  gap: clamp(48px, 8vw, 96px);
  align-items: center;
  color: var(--white);
}

.featured-cover-wrap { position: relative; max-width: 375px; margin-inline: auto; }
.featured-cover-wrap::after {
  content: "";
  position: absolute;
  inset: 7% -8%;
  background: rgba(201,152,61,.16);
  filter: blur(42px);
  z-index: 0;
}
.featured-cover { position: relative; z-index: 1; width: 100%; box-shadow: 0 30px 60px rgba(0,0,0,.42); }
.availability-badge {
  position: absolute;
  right: -22px;
  top: 24px;
  z-index: 2;
  background: var(--orange);
  color: var(--white);
  padding: 9px 14px;
  border-radius: 999px;
  font-size: .72rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: .06em;
  box-shadow: 0 10px 24px rgba(0,0,0,.22);
}
.featured-copy h2 { color: var(--white); margin-bottom: 10px; }
.subtitle {
  color: var(--gold-light);
  font-family: Georgia, "Times New Roman", serif;
  font-size: 1.35rem;
  line-height: 1.35;
}
.author-line {
  margin-top: 13px;
  text-transform: uppercase;
  letter-spacing: .12em;
  font-size: .75rem;
  font-weight: 800;
  color: rgba(255,255,255,.65);
}
.description { margin-top: 24px; color: rgba(255,255,255,.82); font-size: 1.03rem; }

.edition-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; margin-top: 30px; }
.edition-card {
  border: 1px solid rgba(255,255,255,.18);
  padding: 23px;
  background: rgba(255,255,255,.05);
}
.edition-card.available { border-top: 3px solid var(--orange); }
.edition-card.upcoming { border-top: 3px solid var(--gold); }
.edition-status {
  display: block;
  color: var(--gold-light);
  text-transform: uppercase;
  letter-spacing: .08em;
  font-size: .68rem;
  font-weight: 800;
  margin-bottom: 8px;
}
.edition-card h3 { font-family: Georgia, "Times New Roman", serif; font-size: 1.3rem; }
.edition-card p { color: rgba(255,255,255,.68); font-size: .91rem; margin: 8px 0 17px; }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 11px 21px;
  border-radius: 999px;
  font-size: .76rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: .055em;
  transition: transform .2s ease, background .2s ease, color .2s ease;
}
.btn:hover { transform: translateY(-2px); }
.btn.primary { background: var(--gold); color: var(--navy); }
.btn.primary:hover { background: var(--gold-light); }
.btn.outline { border: 1px solid rgba(255,255,255,.5); color: var(--white); }
.btn.outline:hover { background: var(--white); color: var(--navy); }

/* Roadmap */
.roadmap { background: var(--light); }
.section-heading {
  display: grid;
  grid-template-columns: 1.05fr .95fr;
  gap: 70px;
  align-items: end;
  margin-bottom: 45px;
}
.section-heading > p { color: var(--muted); font-size: 1.05rem; }

.future-cover {
    width: 100%;
    aspect-ratio: 2 / 3;
    object-fit: cover;
    box-shadow: 0 18px 32px rgba(0,0,0,.2);
    border-radius: 4px;
}

.roadmap-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 26px; }
.future-book {
  position: relative;
  background: var(--white);
  border: 1px solid var(--border);
  padding: 27px;
  display: grid;
  grid-template-columns: 150px 1fr;
  gap: 25px;
  min-height: 330px;
  box-shadow: 0 10px 28px rgba(7,27,51,.06);
  transition: transform .25s ease, box-shadow .25s ease, border-color .25s ease;
}
.future-book:hover { transform: translateY(-5px); box-shadow: var(--shadow); border-color: rgba(201,152,61,.6); }
.future-book.next-book { grid-column: span 2; grid-template-columns: 210px 1fr; border-top: 4px solid var(--orange); }
.sequence {
  position: absolute;
  right: 20px;
  top: 16px;
  color: #a8b0b8;
  font-size: .66rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: .11em;
}

.concept-cover {
  width: 100%;
  aspect-ratio: 2 / 3;
  padding: 18px 14px;
  color: var(--white);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  box-shadow: 0 18px 32px rgba(0,0,0,.2);
  position: relative;
  overflow: hidden;
}
.concept-cover::after {
  content: "";
  position: absolute;
  width: 110px;
  height: 110px;
  border: 1px solid rgba(255,255,255,.22);
  border-radius: 50%;
  right: -38px;
  bottom: 35px;
}
.cover-series { color: var(--gold-light); font-size: .67rem; letter-spacing: .17em; font-weight: 800; }
.concept-cover strong { font-family: Georgia, "Times New Roman", serif; font-size: 1.45rem; line-height: 1.04; z-index: 1; }
.concept-cover small { font-size: .55rem; text-transform: uppercase; letter-spacing: .05em; z-index: 1; }
.cover-ai { background: linear-gradient(145deg, #06172c, #176892); }
.cover-execute { background: linear-gradient(145deg, #081b33, #8a5a17); }
.cover-lead { background: linear-gradient(145deg, #102b4a, #4e5660); }
.cover-tech { background: linear-gradient(145deg, #071b33, #176f78); }
.cover-exit { background: linear-gradient(145deg, #172438, #835d36); }
.cover-enterprise { background: linear-gradient(145deg, #06172c, #4e2c62); }

.future-copy { align-self: center; }
.future-copy h3 { color: var(--navy); font-family: Georgia, "Times New Roman", serif; font-size: 1.65rem; line-height: 1.15; margin-bottom: 5px; }
.future-subtitle { color: var(--gold); font-weight: 800; font-size: .92rem; margin-bottom: 13px; }
.future-copy > p:not(.book-label):not(.future-subtitle) { color: var(--muted); font-size: .94rem; }
.status-pill {
  display: inline-block;
  margin-top: 18px;
  padding: 6px 11px;
  border-radius: 999px;
  background: rgba(242,106,27,.12);
  color: #c84e08;
  font-size: .65rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: .07em;
}
.status-pill.muted { background: #edf0f2; color: #67717b; }

/* Philosophy */
.philosophy {
  padding: 92px 0;
  background:
    linear-gradient(rgba(7,27,51,.94), rgba(7,27,51,.94)),
    url("images/books-hero.png") center / cover no-repeat;
  color: var(--white);
  text-align: center;
}
.philosophy-inner { max-width: 950px; }
.philosophy blockquote {
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(2rem, 4.2vw, 3.6rem);
  line-height: 1.2;
  margin: 15px 0 32px;
}

/* Footer */
.site-footer { background: var(--charcoal); color: rgba(255,255,255,.75); padding: 30px 0; }
.footer-inner { display: flex; align-items: center; justify-content: space-between; gap: 30px; font-size: .85rem; }
.footer-inner strong { color: var(--white); font-family: Georgia, "Times New Roman", serif; font-size: 1rem; }
.footer-inner div p { margin-top: 3px; }

@media (max-width: 1120px) {
  .primary-nav { gap: 14px; font-size: 10px; }
  .contact-btn { padding-inline: 16px; }
}

@media (max-width: 900px) {
  .site-header { padding: 14px 20px; flex-wrap: wrap; }
  .menu-toggle { display: block; }
  .contact-btn { margin-left: 0; }
  .primary-nav {
    display: none;
    order: 4;
    width: 100%;
    flex-direction: column;
    align-items: flex-start;
    padding: 15px 0 5px;
    gap: 0;
  }
  .primary-nav.open { display: flex; }
  .primary-nav a { width: 100%; padding: 10px 0; border-bottom: 1px solid rgba(255,255,255,.09); }
  .featured-book { grid-template-columns: 1fr; }
  .featured-cover-wrap { max-width: 300px; }
  .section-heading { grid-template-columns: 1fr; gap: 20px; }
  .roadmap-grid { grid-template-columns: 1fr; }
  .future-book.next-book { grid-column: span 1; }
  .footer-inner { align-items: flex-start; flex-direction: column; }
}

@media (max-width: 650px) {
  .container { width: min(calc(100% - 30px), var(--container)); }
  .section-space { padding: 64px 0; }
  .hero { padding: 82px 0; }
  .release-banner-inner { align-items: flex-start; flex-direction: column; padding: 14px 0; gap: 5px; }
  .release-date { white-space: normal; }
  .availability-badge { right: -8px; top: 15px; }
  .edition-grid { grid-template-columns: 1fr; }
  .future-book,
  .future-book.next-book { grid-template-columns: 1fr; }
  .concept-cover { max-width: 190px; margin-inline: auto; }
  .future-copy { text-align: center; }
  .sequence { right: 15px; }
  .contact-btn { display: none; }
}