/* ---- Tokens ---- */
:root {
  --ink: #20242B;
  --ink-soft: #454B57;
  --paper: #E8E1D3;
  --paper-raised: #F1ECE0;
  --rule: #C9BFA9;
  --oxblood: #6B2737;
  --moss: #2F4538;
  --brass: #A9895C;

  --serif: "Source Serif 4", "Iowan Old Style", "Palatino Linotype", Georgia, serif;
  --sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--serif);
  font-size: 18px;
  line-height: 1.55;
}

a { color: inherit; }

::selection { background: var(--brass); color: var(--paper); }

@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; }
}

:focus-visible {
  outline: 2px solid var(--oxblood);
  outline-offset: 2px;
}

/* ---- Shell ---- */

.shell {
  max-width: 760px;
  margin: 0 auto;
  padding: 0 28px;
}

/* ---- Nav ---- */

.site-nav {
  border-bottom: 1px solid var(--rule);
}

.site-nav .shell {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  padding-top: 22px;
  padding-bottom: 22px;
  gap: 20px;
}

.wordmark {
  font-family: var(--serif);
  font-weight: 600;
  font-size: 22px;
  letter-spacing: 0.01em;
  text-decoration: none;
  color: var(--ink);
}

.wordmark em {
  font-style: italic;
  color: var(--oxblood);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 18px;
  font-family: var(--sans);
  font-size: 14.5px;
}

.nav-actions form { margin: 0; }

.nav-email {
  color: var(--ink-soft);
}

.link-button {
  background: none;
  border: none;
  padding: 0;
  font: inherit;
  color: var(--ink-soft);
  cursor: pointer;
  text-decoration: underline;
  text-underline-offset: 3px;
}

.link-button:hover { color: var(--oxblood); }

.nav-link {
  text-decoration: none;
  color: var(--ink-soft);
}

.nav-link:hover { color: var(--oxblood); }

.btn-primary {
  display: inline-block;
  font-family: var(--sans);
  font-size: 14.5px;
  font-weight: 600;
  text-decoration: none;
  color: var(--paper);
  background: var(--ink);
  padding: 9px 16px;
  border-radius: 3px;
  border: none;
  cursor: pointer;
}

.btn-primary:hover { background: var(--oxblood); }

/* ---- Hero ---- */

.hero {
  padding: 64px 0 40px;
}

.hero h1 {
  font-size: 40px;
  line-height: 1.2;
  font-weight: 600;
  max-width: 15ch;
  margin: 0 0 18px;
}

.hero p {
  max-width: 46ch;
  color: var(--ink-soft);
  font-size: 19px;
  margin: 0;
}

/* ---- Shelf (book listing) ---- */

.shelf {
  padding: 20px 0 70px;
}

.shelf-list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--rule);
}

.shelf-item {
  display: flex;
  gap: 26px;
  padding: 34px 0;
  border-bottom: 1px solid var(--rule);
  align-items: flex-start;
}

.spine {
  flex: 0 0 auto;
  width: 78px;
  height: 118px;
  border-radius: 2px 5px 5px 2px;
  position: relative;
  box-shadow: inset -6px 0 10px rgba(0, 0, 0, 0.18);
  overflow: hidden;
}

.spine-label {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 118px;
  text-align: center;
  font-family: var(--sans);
  font-size: 10.5px;
  letter-spacing: 0.14em;
  color: var(--paper-raised);
  transform: translate(-50%, -50%) rotate(-90deg);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.book-meta { flex: 1 1 auto; min-width: 0; }

.book-meta h2 {
  font-size: 23px;
  margin: 0 0 4px;
  font-weight: 600;
}

.book-meta h2 a {
  text-decoration: none;
}

.book-meta h2 a:hover {
  color: var(--oxblood);
}

.book-author {
  font-family: var(--sans);
  font-size: 13.5px;
  color: var(--ink-soft);
  margin: 0 0 12px;
}

.book-blurb {
  margin: 0 0 16px;
  color: var(--ink-soft);
  max-width: 52ch;
}

.book-row-footer {
  display: flex;
  align-items: center;
  gap: 18px;
}

.price {
  font-family: var(--sans);
  font-weight: 600;
  font-size: 15px;
  margin-right: 18px;
}

.view-link {
  font-family: var(--sans);
  font-size: 14px;
  text-decoration: none;
  color: var(--ink-soft);
  border-bottom: 1px solid var(--rule);
}

.view-link:hover { color: var(--oxblood); border-color: var(--oxblood); }

/* ---- Book detail ---- */

.book-detail {
  padding: 56px 0 80px;
  display: flex;
  gap: 40px;
}

.book-detail .spine {
  width: 130px;
  height: 196px;
  flex-shrink: 0;
}

.book-detail .spine-label { font-size: 12px; }

.book-detail-copy h1 {
  font-size: 32px;
  margin: 0 0 6px;
}

.book-detail-copy .book-author {
  font-size: 15px;
  margin-bottom: 20px;
}

.book-detail-copy .book-blurb {
  font-size: 19px;
  max-width: 50ch;
}

.book-detail-copy .price {
  font-size: 20px;
  display: block;
  margin: 26px 0 16px;
}

.stub-note {
  font-family: var(--sans);
  font-size: 13px;
  color: var(--ink-soft);
  margin-top: 14px;
  max-width: 40ch;
}

/* ---- Forms (login / register) ---- */

.auth-page {
  padding: 64px 0 90px;
  max-width: 420px;
  margin: 0 auto;
}

.auth-page h1 {
  font-size: 30px;
  margin: 0 0 8px;
}

.auth-subtitle {
  font-family: var(--sans);
  color: var(--ink-soft);
  font-size: 15px;
  margin: 0 0 32px;
}

.field {
  margin-bottom: 20px;
}

.field label {
  display: block;
  font-family: var(--sans);
  font-size: 13px;
  font-weight: 600;
  color: var(--ink-soft);
  margin-bottom: 6px;
}

.field input {
  width: 100%;
  font-family: var(--sans);
  font-size: 16px;
  padding: 11px 12px;
  border: 1px solid var(--rule);
  border-radius: 3px;
  background: var(--paper-raised);
  color: var(--ink);
}

.field input:focus {
  border-color: var(--oxblood);
}

.form-error {
  font-family: var(--sans);
  font-size: 14px;
  color: var(--oxblood);
  background: rgba(107, 39, 55, 0.08);
  border: 1px solid rgba(107, 39, 55, 0.25);
  padding: 10px 14px;
  border-radius: 3px;
  margin-bottom: 20px;
}

.btn-full {
  width: 100%;
  padding: 12px 16px;
  font-size: 15px;
  text-align: center;
}

.auth-switch {
  font-family: var(--sans);
  font-size: 14px;
  color: var(--ink-soft);
  margin-top: 22px;
}

.auth-switch a {
  color: var(--ink);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---- Checkout confirmation ---- */

.checkout-page {
  padding: 70px 0 100px;
  max-width: 480px;
  margin: 0 auto;
}

.checkout-mark {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--moss);
  color: var(--paper);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--sans);
  font-size: 18px;
  margin-bottom: 22px;
}

.checkout-page h1 {
  font-size: 27px;
  margin: 0 0 12px;
}

.checkout-page p {
  color: var(--ink-soft);
}

.order-ref {
  font-family: var(--sans);
  font-size: 13px;
  color: var(--ink-soft);
  border-top: 1px solid var(--rule);
  margin-top: 26px;
  padding-top: 18px;
}

/* ---- Orders page ---- */

.orders-page { padding: 56px 0 90px; }
.orders-page h1 { font-size: 28px; margin: 0 0 28px; }

.orders-list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--rule);
  font-family: var(--sans);
}

.orders-list li {
  display: flex;
  justify-content: space-between;
  padding: 16px 0;
  border-bottom: 1px solid var(--rule);
  font-size: 15px;
}

.order-status {
  text-transform: lowercase;
  color: var(--ink-soft);
}

.empty-note {
  font-family: var(--sans);
  color: var(--ink-soft);
  font-size: 15px;
}

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

.site-footer {
  border-top: 1px solid var(--rule);
  padding: 26px 0 40px;
  font-family: var(--sans);
  font-size: 13px;
  color: var(--ink-soft);
}

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

@media (max-width: 560px) {
  body { font-size: 17px; }
  .hero h1 { font-size: 30px; }
  .book-detail { flex-direction: column; }
  .shelf-item { gap: 18px; }
  .spine { width: 60px; height: 92px; }
}