/* Deinela Media landing page
   Font: TeX Gyre Adventor (GUST Font License, self-hosted, same family
   used on the Drillbook series covers). */

@font-face {
  font-family: "TeX Gyre Adventor";
  src: url("../assets/fonts/texgyreadventor-regular.woff2") format("woff2");
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "TeX Gyre Adventor";
  src: url("../assets/fonts/texgyreadventor-bold.woff2") format("woff2");
  font-weight: 700;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "TeX Gyre Adventor";
  src: url("../assets/fonts/texgyreadventor-italic.woff2") format("woff2");
  font-weight: 400;
  font-style: italic;
  font-display: swap;
}
@font-face {
  font-family: "TeX Gyre Adventor";
  src: url("../assets/fonts/texgyreadventor-bolditalic.woff2") format("woff2");
  font-weight: 700;
  font-style: italic;
  font-display: swap;
}

:root {
  --navy: #0b2545;
  --steel: #1b5e9e;
  --cyan: #4fa6d9;
  --icy: #bfe6f5;
  --paper: #f7f9fc;
  --ink: #14213a;
  --line: #dbe4ef;
  --max-width: 1080px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "TeX Gyre Adventor", "Helvetica Neue", Arial, sans-serif;
  color: var(--ink);
  background: var(--paper);
  line-height: 1.5;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

h1, h2, h3 {
  font-weight: 700;
  color: var(--navy);
  line-height: 1.2;
  text-wrap: balance;
}

a {
  color: var(--steel);
}

.wrap {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
  width: 100%;
}

/* ---------- Header ---------- */

header.site-header {
  padding: 0.85rem 0;
  border-bottom: 1px solid var(--line);
}

header.site-header .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--navy);
  text-decoration: none;
  letter-spacing: 0.02em;
}

.brand span {
  color: var(--steel);
}

/* ---------- Compact intro strip ---------- */

.intro {
  position: relative;
  padding: 1.3rem 0;
  background-color: var(--navy);
  background-image:
    linear-gradient(rgba(11, 37, 69, 0.94), rgba(11, 37, 69, 0.9)),
    repeating-linear-gradient(
      0deg,
      rgba(191, 230, 245, 0.08) 0px,
      rgba(191, 230, 245, 0.08) 1px,
      transparent 1px,
      transparent 28px
    ),
    repeating-linear-gradient(
      90deg,
      rgba(191, 230, 245, 0.08) 0px,
      rgba(191, 230, 245, 0.08) 1px,
      transparent 1px,
      transparent 28px
    );
  color: #fff;
  text-align: center;
}

.intro h1 {
  color: #fff;
  font-size: clamp(1.3rem, 2.6vw, 1.7rem);
  margin: 0 0 0.25rem;
}

.intro p {
  font-size: 0.95rem;
  color: var(--icy);
  margin: 0;
}

/* ---------- Main fold ---------- */

main {
  flex: 1;
  display: flex;
  align-items: center;
  padding: 1.6rem 0;
}

.fold {
  display: block;
}

.fold-head {
  margin: 0 0 0.9rem;
}

.fold-head h2 {
  font-size: 1.15rem;
  margin: 0 0 0.15rem;
}

.fold-head p {
  color: #3c4a63;
  margin: 0;
  font-size: 0.88rem;
}

/* ---------- Book grid ---------- */

.book-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.9rem 1rem;
}

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

.book-card .cover-frame {
  display: block;
  border-radius: 5px;
  overflow: hidden;
  box-shadow: 0 6px 14px rgba(11, 37, 69, 0.16);
  margin-bottom: 0.4rem;
  background: #fff;
  aspect-ratio: 3 / 4;
}

.book-card img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.book-card h3 {
  font-size: 0.72rem;
  font-weight: 700;
  margin: 0 0 0.2rem;
  line-height: 1.2;
}

.book-card .buy-link {
  display: inline-block;
  font-weight: 700;
  font-size: 0.72rem;
  text-decoration: none;
  border-bottom: 1px solid var(--cyan);
  padding-bottom: 1px;
}

.book-card .buy-link:hover {
  border-color: var(--steel);
}

/* ---------- Footer ---------- */

footer.site-footer {
  padding: 1.5rem 0;
  text-align: center;
  color: #64738c;
  font-size: 0.82rem;
  border-top: 1px solid var(--line);
}

footer.site-footer a {
  color: #64738c;
}

/* ---------- Responsive ---------- */

@media (max-width: 420px) {
  .book-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}