/* Gaya bersama untuk semua halaman iqbalwahid.my.id */
:root {
  --kertas: #FBF6EC;
  --kertas-2: #F3EBDA;
  --tinta: #211E1B;
  --tinta-2: #5B544C;
  --garis: #DDD2BE;
  --merah: #A33A2B;
  --serif: "Source Serif 4", Georgia, serif;
  --sans: "Source Sans 3", system-ui, sans-serif;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0; background: var(--kertas); color: var(--tinta);
  font-family: var(--serif); font-size: 18px; line-height: 1.65;
  -webkit-font-smoothing: antialiased; overflow-wrap: break-word;
}
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; }
.wadah { max-width: 1040px; margin: 0 auto; padding: 0 24px; }
.sempit { max-width: 680px; }
.label {
  font-family: var(--sans); font-weight: 600; font-size: 13px;
  letter-spacing: .22em; text-transform: uppercase; color: var(--tinta-2);
}
.label.merah { color: var(--merah); }

/* kepala */
header { border-bottom: 1px solid var(--garis); background: var(--kertas); position: sticky; top: 0; z-index: 10; }
header .wadah { display: flex; align-items: center; justify-content: space-between; gap: 16px; min-height: 64px; }
.nama { font-family: var(--sans); font-weight: 600; letter-spacing: .2em; text-transform: uppercase; font-size: 14px; text-decoration: none; padding: 12px 0; }
nav { display: flex; gap: 4px; font-family: var(--sans); font-size: 15px; }
nav a { text-decoration: none; color: var(--tinta-2); padding: 12px 10px; }
nav a:hover, nav a[aria-current] { color: var(--merah); }

/* tombol: tinggi minimal 48px supaya nyaman disentuh */
.tombol-baris { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; }
.tombol {
  display: inline-flex; align-items: center; justify-content: center; min-height: 48px;
  font-family: var(--sans); font-weight: 600; font-size: 16px;
  padding: 12px 24px; border-radius: 4px; text-decoration: none; border: 1.5px solid var(--tinta);
}
.tombol.utama { background: var(--tinta); color: var(--kertas); }
.tombol.utama:hover { background: var(--merah); border-color: var(--merah); }
.tombol.kedua:hover { color: var(--merah); border-color: var(--merah); }

/* bagian */
section { padding: 80px 0; }
.garis-atas { border-top: 1px solid var(--garis); }
.krem { background: var(--kertas-2); }
h1, h2, h3 { text-wrap: balance; }
h2 { font-size: clamp(28px, 4vw, 40px); line-height: 1.15; margin: 10px 0 20px; }
.sampul { box-shadow: 0 1px 2px rgba(0,0,0,.08), 0 18px 40px -12px rgba(60,40,20,.35); border-radius: 2px; }

/* rak buku */
.rak { display: grid; grid-template-columns: repeat(3, 1fr); gap: 32px 28px; margin-top: 36px; }
.kartu { text-decoration: none; display: block; }
.kartu .kover { position: relative; aspect-ratio: 1678 / 2381; border-radius: 2px; overflow: hidden; background: var(--kertas-2); }
.kartu .kover img { width: 100%; height: 100%; object-fit: cover; }
a.kartu .kover { box-shadow: 0 1px 2px rgba(0,0,0,.06), 0 14px 30px -14px rgba(60,40,20,.4); transition: transform .2s ease; }
a.kartu:hover .kover { transform: translateY(-4px); }
.kartu .lencana { position: absolute; left: 10px; top: 10px; font-family: var(--sans); font-weight: 600; font-size: 12px; letter-spacing: .08em; text-transform: uppercase; background: var(--merah); color: var(--kertas); padding: 5px 9px; border-radius: 3px; }
.kartu.kosong .kover { border: 1.5px dashed var(--garis); display: grid; place-items: center; text-align: center; padding: 20px; color: var(--tinta-2); font-style: italic; line-height: 1.5; }
.kartu h3 { font-size: 21px; line-height: 1.25; margin: 16px 0 4px; }
.kartu p { margin: 0; font-family: var(--sans); font-size: 15px; color: var(--tinta-2); }
a.kartu:hover h3 { color: var(--merah); }

/* kaki */
footer { border-top: 1px solid var(--garis); padding: 32px 0 44px; font-family: var(--sans); font-size: 15px; color: var(--tinta-2); }
footer .wadah { display: flex; flex-wrap: wrap; gap: 8px 16px; justify-content: space-between; align-items: center; }
footer .sosial { display: flex; gap: 4px; }
footer .sosial a { text-decoration: none; padding: 10px; }
footer a:hover { color: var(--merah); }

@media (max-width: 820px) {
  body { font-size: 17px; }
  .wadah { padding: 0 16px; }
  section { padding: 56px 0; }
  .rak { grid-template-columns: 1fr 1fr; gap: 28px 16px; }
  .kartu h3 { font-size: 18px; }
  .kartu p { font-size: 14px; }
}
@media (max-width: 480px) {
  header .wadah { min-height: 56px; }
  .nama { font-size: 12px; letter-spacing: .14em; }
  nav { font-size: 14px; }
  nav a { padding: 12px 8px; }
  .tombol-baris .tombol { flex: 1 1 100%; }
}