/* =========================================================
   Lor Criber — reusable components & microinteractions
   ========================================================= */

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-h);
  display: flex;
  align-items: center;
  background: color-mix(in srgb, var(--bg) 78%, transparent);
  backdrop-filter: blur(14px) saturate(160%);
  border-bottom: 1px solid transparent;
  transition: border-color var(--dur) var(--ease-out),
    background-color var(--dur) var(--ease-out), height var(--dur) var(--ease-out);
}

.site-header[data-scrolled='true'] {
  height: 58px;
  border-bottom-color: var(--line);
  background: color-mix(in srgb, var(--bg) 92%, transparent);
}

.site-header .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
}

.brand {
  display: inline-flex;
  align-items: baseline;
  gap: 0.5rem;
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 600;
  letter-spacing: -0.03em;
}

.brand__dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--accent);
  transition: transform var(--dur) var(--ease-spring);
}

.brand:hover .brand__dot {
  transform: translateY(-4px) scale(1.4);
}

.site-nav {
  display: flex;
  align-items: center;
  gap: clamp(0.75rem, 2vw, 1.75rem);
}

.site-nav a {
  position: relative;
  padding-block: 0.35rem;
  font-size: var(--step--1);
  font-weight: 500;
  color: var(--ink-soft);
  transition: color var(--dur-fast) var(--ease-out);
}

.site-nav a::after {
  content: '';
  position: absolute;
  inset-inline: 0;
  bottom: 0;
  height: 1.5px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform var(--dur) var(--ease-out);
}

.site-nav a:hover,
.site-nav a[aria-current='page'] {
  color: var(--ink);
}

.site-nav a:hover::after,
.site-nav a[aria-current='page']::after {
  transform: scaleX(1);
  transform-origin: left;
}

@media (max-width: 640px) {
  .site-nav .nav-optional {
    display: none;
  }
}

/* ---------------- Theme toggle ---------------- */

.theme-toggle {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  border: 1px solid var(--line);
  border-radius: var(--radius-pill);
  color: var(--ink-soft);
  transition: border-color var(--dur-fast), color var(--dur-fast),
    transform var(--dur) var(--ease-spring), background-color var(--dur-fast);
}

.theme-toggle:hover {
  border-color: var(--accent);
  color: var(--accent);
  transform: rotate(-25deg) scale(1.08);
}

.theme-toggle svg {
  width: 18px;
  height: 18px;
}

.theme-toggle .icon-moon {
  display: none;
}

:root[data-theme='dark'] .theme-toggle .icon-moon {
  display: block;
}

:root[data-theme='dark'] .theme-toggle .icon-sun {
  display: none;
}

/* ---------------- Buttons ---------------- */

.btn {
  --btn-bg: var(--ink);
  --btn-fg: var(--bg);
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  padding: 0.85rem 1.5rem;
  border-radius: var(--radius-pill);
  background: var(--btn-bg);
  color: var(--btn-fg);
  font-size: var(--step--1);
  font-weight: 600;
  letter-spacing: 0.01em;
  white-space: nowrap;
  overflow: hidden;
  isolation: isolate;
  transition: transform var(--dur) var(--ease-spring), box-shadow var(--dur) var(--ease-out),
    background-color var(--dur-fast) var(--ease-out);
}

/* Sheen sweep on hover */
.btn::before {
  content: '';
  position: absolute;
  inset: 0;
  z-index: -1;
  background: linear-gradient(
    100deg,
    transparent 20%,
    rgb(255 255 255 / 22%) 50%,
    transparent 80%
  );
  transform: translateX(-120%);
  transition: transform var(--dur-slow) var(--ease-out);
}

.btn:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.btn:hover::before {
  transform: translateX(120%);
}

.btn:active {
  transform: translateY(0) scale(0.98);
}

.btn svg {
  width: 17px;
  height: 17px;
  flex-shrink: 0;
  transition: transform var(--dur) var(--ease-spring);
}

.btn:hover svg.arrow {
  transform: translateX(4px);
}

.btn--accent {
  --btn-bg: var(--accent);
  --btn-fg: #fff;
}

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

.btn--outline {
  --btn-bg: transparent;
  --btn-fg: var(--ink);
  border: 1px solid var(--line-strong);
}

.btn--outline:hover {
  border-color: var(--ink);
  background: var(--bg-elevated);
}

.btn--amazon {
  --btn-bg: #ff9900;
  --btn-fg: #14110f;
}

.btn--lulu {
  --btn-bg: var(--accent-2);
  --btn-fg: #fff;
}

.btn--block {
  width: 100%;
}

.btn--lg {
  padding: 1.05rem 1.9rem;
  font-size: var(--step-0);
}

/* Text link with animated arrow */
.link-arrow {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  font-weight: 600;
  font-size: var(--step--1);
  color: var(--accent);
}

.link-arrow svg {
  width: 15px;
  height: 15px;
  transition: transform var(--dur) var(--ease-spring);
}

.link-arrow:hover svg {
  transform: translateX(5px);
}

/* ---------------- Book cover (CSS-generated art) ---------------- */

.cover {
  --c1: #7a3b2e;
  --c2: #d98f52;
  position: relative;
  aspect-ratio: 2 / 3;
  border-radius: 3px 8px 8px 3px;
  background: linear-gradient(150deg, var(--c1), var(--c2));
  box-shadow: var(--shadow-cover);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 12% 10% 9% 14%;
  color: #fff;
  transition: box-shadow var(--dur) var(--ease-out);
}

/* Real artwork fills the frame; the spine and gloss below still paint on top. */
.cover__art {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* Spine */
.cover::before {
  content: '';
  position: absolute;
  inset-block: 0;
  left: 0;
  width: 7%;
  background: linear-gradient(
    90deg,
    rgb(0 0 0 / 38%),
    rgb(0 0 0 / 8%) 60%,
    rgb(255 255 255 / 14%)
  );
}

/* Paper grain + gloss */
.cover::after {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(
      120% 80% at 78% 0%,
      rgb(255 255 255 / 26%),
      transparent 62%
    ),
    repeating-linear-gradient(
      -38deg,
      rgb(255 255 255 / 4%) 0 2px,
      transparent 2px 5px
    );
  pointer-events: none;
}

.cover__title {
  font-family: var(--font-display);
  font-size: clamp(0.9rem, 2.1cqw + 0.6rem, 1.6rem);
  font-weight: 600;
  line-height: 1.12;
  letter-spacing: -0.015em;
  text-wrap: balance;
  text-shadow: 0 1px 12px rgb(0 0 0 / 30%);
}

.cover__rule {
  width: 34%;
  height: 2px;
  margin-block: 0.6em;
  background: currentColor;
  opacity: 0.6;
}

.cover__author {
  font-size: clamp(0.6rem, 1.1cqw + 0.4rem, 0.85rem);
  font-weight: 600;
  /* Keep multi-word author names on one line at every cover size. */
  letter-spacing: 0.15em;
  white-space: nowrap;
  text-transform: uppercase;
  opacity: 0.9;
}

.cover__kind {
  font-size: clamp(0.55rem, 1cqw + 0.35rem, 0.75rem);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  opacity: 0.72;
}

/* ---------------- Book card ---------------- */

.book-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: clamp(1.5rem, 3.5vw, 2.75rem);
}

.book-card {
  container-type: inline-size;
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  padding: 1rem 1rem 1.35rem;
  border-radius: var(--radius);
  transition: background-color var(--dur) var(--ease-out),
    transform var(--dur) var(--ease-out);
}

.book-card:hover {
  background: var(--bg-elevated);
}

.book-card__media {
  perspective: 1000px;
}

/* 3D tilt target — driven by JS custom properties */
.book-card__cover {
  transform: rotateX(var(--rx, 0deg)) rotateY(var(--ry, 0deg)) translateZ(0);
  transform-style: preserve-3d;
  transition: transform var(--dur) var(--ease-out);
  will-change: transform;
}

.book-card:hover .book-card__cover {
  box-shadow: var(--shadow-lg);
}

/* Glare that follows the pointer */
.book-card__cover .glare {
  position: absolute;
  inset: 0;
  z-index: 2;
  background: radial-gradient(
    circle at var(--mx, 50%) var(--my, 50%),
    rgb(255 255 255 / 34%),
    transparent 52%
  );
  opacity: 0;
  transition: opacity var(--dur) var(--ease-out);
  pointer-events: none;
}

.book-card:hover .book-card__cover .glare {
  opacity: 1;
}

.book-card__body {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.book-card__genre {
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.13em;
  text-transform: uppercase;
  color: var(--ink-muted);
}

.book-card__title {
  font-family: var(--font-display);
  font-size: var(--step-1);
  font-weight: 600;
  line-height: 1.15;
  letter-spacing: -0.02em;
}

.book-card__tagline {
  font-size: var(--step--1);
  color: var(--ink-muted);
  font-style: italic;
}

.book-card__foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  margin-top: 0.35rem;
}

.book-card__price {
  font-size: var(--step--1);
  font-weight: 600;
  color: var(--ink-soft);
}

/* Whole card is clickable, but the title stays the a11y anchor */
.book-card__link::after {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
}

.book-card__cta {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-size: var(--step--1);
  font-weight: 600;
  color: var(--accent);
  opacity: 0;
  transform: translateX(-6px);
  transition: opacity var(--dur) var(--ease-out), transform var(--dur) var(--ease-out);
}

.book-card:hover .book-card__cta,
.book-card:focus-within .book-card__cta {
  opacity: 1;
  transform: translateX(0);
}

.book-card__badge {
  position: absolute;
  top: 1.6rem;
  right: 1.6rem;
  z-index: 3;
  padding: 0.3rem 0.7rem;
  border-radius: var(--radius-pill);
  background: var(--bg-elevated);
  color: var(--accent);
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  box-shadow: var(--shadow-sm);
}

/* ---------------- Rating stars ---------------- */

.stars {
  display: inline-flex;
  align-items: center;
  gap: 0.15rem;
  color: var(--gold);
}

.stars svg {
  width: 15px;
  height: 15px;
}

.stars__value {
  margin-left: 0.4rem;
  font-size: var(--step--1);
  font-weight: 600;
  color: var(--ink-soft);
}

.stars--interactive button {
  display: grid;
  place-items: center;
  padding: 2px;
  color: var(--line-strong);
  transition: transform var(--dur-fast) var(--ease-spring), color var(--dur-fast);
}

.stars--interactive button[data-on='true'] {
  color: var(--gold);
}

.stars--interactive button:hover {
  transform: scale(1.25);
}

/* ---------------- Filter chips ---------------- */

.filters {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem 1rem;
  margin-bottom: 2.25rem;
}

.chip-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.chip {
  position: relative;
  padding: 0.5rem 1.05rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-pill);
  font-size: var(--step--1);
  font-weight: 500;
  color: var(--ink-soft);
  transition: color var(--dur-fast), border-color var(--dur-fast),
    transform var(--dur) var(--ease-spring);
}

.chip:hover {
  border-color: var(--line-strong);
  transform: translateY(-2px);
}

select.chip {
  background: transparent;
  appearance: none;
  padding-right: 2.25rem;
  background-image: linear-gradient(45deg, transparent 50%, currentColor 50%),
    linear-gradient(135deg, currentColor 50%, transparent 50%);
  background-position: right 1.15rem center, right 0.85rem center;
  background-size: 5px 5px, 5px 5px;
  background-repeat: no-repeat;
}

.chip[aria-pressed='true'] {
  background: var(--ink);
  border-color: var(--ink);
  color: var(--bg);
}

.search-field {
  position: relative;
  flex: 1 1 220px;
  max-width: 320px;
}

.search-field svg {
  position: absolute;
  top: 50%;
  left: 0.9rem;
  width: 16px;
  height: 16px;
  color: var(--ink-muted);
  transform: translateY(-50%);
  pointer-events: none;
}

.search-field input {
  width: 100%;
  padding: 0.6rem 1rem 0.6rem 2.5rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-pill);
  background: transparent;
  font-size: var(--step--1);
  transition: border-color var(--dur-fast), background-color var(--dur-fast);
}

.search-field input:focus {
  outline: none;
  border-color: var(--accent);
  background: var(--bg-elevated);
}

.search-field input::placeholder {
  color: var(--ink-muted);
}

/* ---------------- Forms ---------------- */

.field {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.field label {
  font-size: var(--step--1);
  font-weight: 600;
  color: var(--ink-soft);
}

.field input,
.field textarea,
.field select {
  padding: 0.75rem 1rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: var(--bg-elevated);
  transition: border-color var(--dur-fast), box-shadow var(--dur-fast);
}

.field textarea {
  min-height: 120px;
  resize: vertical;
}

.field input:focus,
.field textarea:focus,
.field select:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}

/* ---------------- Reviews ---------------- */

.review {
  padding: 1.35rem 1.5rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--bg-elevated);
  transition: transform var(--dur) var(--ease-out), box-shadow var(--dur) var(--ease-out),
    border-color var(--dur) var(--ease-out);
}

.review:hover {
  transform: translateY(-3px);
  border-color: var(--line-strong);
  box-shadow: var(--shadow-md);
}

.review__head {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  margin-bottom: 0.75rem;
}

.review__avatar {
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  flex-shrink: 0;
  border-radius: 50%;
  background: var(--accent-soft);
  color: var(--accent);
  font-family: var(--font-display);
  font-weight: 600;
}

.review__name {
  font-weight: 600;
  line-height: 1.2;
}

.review__date {
  font-size: 0.78rem;
  color: var(--ink-muted);
}

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

.review--new {
  animation: pop-in var(--dur-slow) var(--ease-spring);
}

@keyframes pop-in {
  from {
    opacity: 0;
    transform: translateY(14px) scale(0.97);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

/* ---------------- Toast ---------------- */

.toast-stack {
  position: fixed;
  bottom: 1.5rem;
  left: 50%;
  z-index: 300;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  transform: translateX(-50%);
  pointer-events: none;
}

.toast {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.8rem 1.25rem;
  border-radius: var(--radius-pill);
  background: var(--ink);
  color: var(--bg);
  font-size: var(--step--1);
  font-weight: 500;
  box-shadow: var(--shadow-lg);
  animation: toast-in var(--dur) var(--ease-spring);
}

.toast[data-leaving='true'] {
  animation: toast-out var(--dur) var(--ease-out) forwards;
}

.toast svg {
  width: 16px;
  height: 16px;
  color: var(--success);
}

@keyframes toast-in {
  from {
    opacity: 0;
    transform: translateY(18px) scale(0.94);
  }
}

@keyframes toast-out {
  to {
    opacity: 0;
    transform: translateY(10px) scale(0.96);
  }
}

/* ---------------- Scroll reveal ---------------- */

[data-reveal] {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity var(--dur-slow) var(--ease-out),
    transform var(--dur-slow) var(--ease-out);
  transition-delay: var(--reveal-delay, 0ms);
}

[data-reveal].is-visible {
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: reduce) {
  [data-reveal] {
    opacity: 1;
    transform: none;
  }
}

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

.site-footer {
  padding-block: clamp(3rem, 6vw, 5rem) 2rem;
  border-top: 1px solid var(--line);
  background: var(--bg-sunken);
}

.site-footer__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 2.5rem;
  margin-bottom: 3rem;
}

.site-footer h4 {
  margin-bottom: 0.9rem;
  font-size: var(--step-0);
}

.site-footer li + li {
  margin-top: 0.5rem;
}

.site-footer a {
  font-size: var(--step--1);
  color: var(--ink-muted);
  transition: color var(--dur-fast), padding-left var(--dur) var(--ease-out);
}

.site-footer a:hover {
  color: var(--accent);
  padding-left: 4px;
}

.site-footer__bottom {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 1rem;
  padding-top: 1.75rem;
  border-top: 1px solid var(--line);
  font-size: 0.82rem;
  color: var(--ink-muted);
}