/* ── Reset ─────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg:            #f7f4ef;
  --surface:       #ffffff;
  --border:        #e8e3da;
  --text-primary:  #1a1714;
  --text-secondary:#6b6560;
  --accent:        #2d6a4f;
  --accent-light:  #d8f3dc;
  --accent-hover:  #1b4332;
  --shadow-sm:     0 1px 3px rgba(0,0,0,.07);
  --shadow-md:     0 4px 16px rgba(0,0,0,.09);
  --shadow-lg:     0 12px 32px rgba(0,0,0,.13);
  --radius:        12px;
  --nav-h:         64px;
  --font-display:  'Lora', Georgia, serif;
  --font-body:     'DM Sans', sans-serif;
  --transition:    .22s cubic-bezier(.4,0,.2,1);
}

[data-theme="dark"] {
  --bg:            #111210;
  --surface:       #1c1e1b;
  --border:        #2a2d29;
  --text-primary:  #edeae4;
  --text-secondary:#8a8780;
  --accent:        #52b788;
  --accent-light:  #1b3a2d;
  --accent-hover:  #74c69d;
  --shadow-sm:     0 1px 3px rgba(0,0,0,.3);
  --shadow-md:     0 4px 16px rgba(0,0,0,.4);
  --shadow-lg:     0 12px 32px rgba(0,0,0,.5);
}

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  background: var(--bg);
  color: var(--text-primary);
  min-height: 100vh;
  transition: background var(--transition), color var(--transition);
  -webkit-font-smoothing: antialiased;
}

/* ── Navbar ────────────────────────────────────────────────── */
.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--nav-h);
  background: var(--bg);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(12px);
  transition: background var(--transition), border-color var(--transition);
}

.navbar__inner {
  max-width: 1200px;
  margin: 0 auto;
  height: 100%;
  padding: 0 24px;
  display: flex;
  align-items: center;
  gap: 16px;
}

.navbar__logo {
  display: flex;
  align-items: center;
  gap: 9px;
  text-decoration: none;
  color: var(--text-primary);
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 600;
  white-space: nowrap;
  flex-shrink: 0;
}

.navbar__logo svg { color: var(--accent); }

.navbar__logo-img {
  height: 26px;
  width: auto;
  display: block;
}

/* Search */
.navbar__search {
  flex: 1;
  max-width: 440px;
  position: relative;
  margin-left: auto;
}

.navbar__search input {
  width: 100%;
  padding: 9px 36px;
  border: 1.5px solid var(--border);
  border-radius: 8px;
  background: var(--surface);
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: .9rem;
  outline: none;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.navbar__search input::placeholder { color: var(--text-secondary); }

.navbar__search input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-light);
}

.search-icon {
  position: absolute;
  left: 11px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-secondary);
  pointer-events: none;
}

.search-clear {
  position: absolute;
  right: 8px;
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  cursor: pointer;
  color: var(--text-secondary);
  font-size: .75rem;
  padding: 4px;
  border-radius: 4px;
  opacity: 0;
  transition: opacity var(--transition), color var(--transition);
  line-height: 1;
}

.search-clear.visible { opacity: 1; }
.search-clear:hover { color: var(--text-primary); }

/* Theme Toggle */
.theme-toggle {
  width: 38px;
  height: 38px;
  border: 1.5px solid var(--border);
  border-radius: 8px;
  background: var(--surface);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  position: relative;
  overflow: hidden;
  transition: border-color var(--transition), transform var(--transition);
}

.theme-toggle:hover { border-color: var(--accent); transform: scale(1.05); }

.theme-toggle__icon {
  position: absolute;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-primary);
  transition: opacity .2s, transform .25s cubic-bezier(.4,0,.2,1);
}

.theme-toggle__sun  { opacity: 1; transform: rotate(0deg) scale(1); }
.theme-toggle__moon { opacity: 0; transform: rotate(90deg) scale(.6); }

[data-theme="dark"] .theme-toggle__sun  { opacity: 0; transform: rotate(-90deg) scale(.6); }
[data-theme="dark"] .theme-toggle__moon { opacity: 1; transform: rotate(0deg) scale(1); }

/* ── Hero ──────────────────────────────────────────────────── */
.main {
  max-width: 1200px;
  margin: 0 auto;
  padding: 48px 24px 80px;
}

.hero { margin-bottom: 40px; }

.hero__title {
  font-family: var(--font-display);
  font-size: clamp(1.7rem, 4vw, 2.4rem);
  font-weight: 600;
  line-height: 1.2;
  margin-bottom: 6px;
}

.hero__sub {
  font-size: .9rem;
  color: var(--text-secondary);
  font-weight: 300;
}

/* ── Grid ──────────────────────────────────────────────────── */
.books-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 24px;
}
/* ── Card tags row ─────────────────────────────────────────── */
.book-card__tags {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
}

/* ── Card ──────────────────────────────────────────────────── */
.book-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
  animation: fadeUp .4s ease both;
}

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(18px); }
  to   { opacity: 1; transform: translateY(0); }
}

.book-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.book-card__cover {
  width: 100%;
  aspect-ratio: 2/3;
  object-fit: cover;
  object-position: center;
  display: block;
  background: var(--border);
}

.book-card__cover-placeholder {
  width: 100%;
  aspect-ratio: 2/3;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--accent-light), var(--border));
  color: var(--accent);
  font-family: var(--font-display);
  font-size: 2.5rem;
  font-style: italic;
}

.book-card__body {
  padding: 16px;
  display: flex;
  flex-direction: column;
  flex: 1;
  gap: 8px;
}

.book-card__category {
  font-size: .7rem;
  font-weight: 500;
  letter-spacing: .06em;
  text-transform: uppercase;
  color: var(--accent);
  background: var(--accent-light);
  padding: 2px 8px;
  border-radius: 20px;
  align-self: flex-start;
}

.book-card__edition {
  font-size: .7rem;
  font-weight: 500;
  letter-spacing: .04em;
  color: var(--text-secondary);
  background: var(--border);
  padding: 2px 8px;
  border-radius: 20px;
  align-self: flex-start;
}

.book-card__title {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 600;
  line-height: 1.3;
}

.book-card__author {
  font-size: .8rem;
  color: var(--text-secondary);
  font-style: italic;
}

.book-card__description {
  font-size: .82rem;
  color: var(--text-secondary);
  line-height: 1.55;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
  flex: 1;
}

.book-card__footer {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  justify-content: space-between;
  padding-top: 12px;
  border-top: 1px solid var(--border);
  margin-top: 4px;
  gap: 8px;
}

.book-card__size {
  font-size: .75rem;
  font-weight: 500;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 4px;
}

.book-card__size svg { color: var(--accent); flex-shrink: 0; }

.book-card__meta-info {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  width: 100%;
  font-size: .72rem;
  color: var(--text-secondary);
  order: 10;
}

.book-card__meta-item {
  display: flex;
  align-items: center;
  gap: 3px;
  white-space: nowrap;
}

.book-card__meta-item strong {
  color: var(--text-primary);
  font-weight: 600;
}

.book-card__download {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 7px 14px;
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: 7px;
  font-family: var(--font-body);
  font-size: .8rem;
  font-weight: 500;
  cursor: pointer;
  text-decoration: none;
  white-space: nowrap;
  transition: background var(--transition), transform var(--transition);
}

.book-card__download:hover {
  background: var(--accent-hover);
  transform: scale(1.03);
}

/* ── Empty State ───────────────────────────────────────────── */
.empty-state {
  text-align: center;
  padding: 80px 24px;
  color: var(--text-secondary);
}

.empty-state svg { margin-bottom: 16px; opacity: .4; }
.empty-state p { font-size: .95rem; }

/* ── Responsive ────────────────────────────────────────────── */
@media (max-width: 600px) {
  .navbar__inner { padding: 0 16px; gap: 10px; }
  .navbar__logo span { display: none; }
  .navbar__search { max-width: none; }
  .main { padding: 24px 12px 48px; }

  /* 1 book per row — horizontal card */
  .books-grid { grid-template-columns: 1fr; gap: 10px; }
  .book-card  { flex-direction: row; min-height: 0; }

  .book-card__cover,
  .book-card__cover-placeholder {
    width: 88px;
    min-width: 88px;
    aspect-ratio: 2/3;
    border-radius: 0;
  }

  .book-card__body { padding: 10px 12px; gap: 5px; }
  .book-card__title { font-size: .88rem; }
  .book-card__author { font-size: .74rem; }
  .book-card__description { -webkit-line-clamp: 2; font-size: .76rem; }
  .book-card__rates { padding-top: 6px; }
  .book-card__footer { padding-top: 8px; }
}

/* Tablet: 3 columns */
@media (min-width: 601px) and (max-width: 900px) {
  .books-grid { grid-template-columns: repeat(3, 1fr); gap: 16px; }
}

@media (min-width: 900px) {
  .books-grid { grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); }
}

/* ── Like / Dislike ────────────────────────────────────────── */
.book-card__rates {
  display: flex;
  align-items: center;
  gap: 6px;
  padding-top: 10px;
  border-top: 1px solid var(--border);
  margin-top: 4px;
}

.btn-rate {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 4px 10px;
  border: 1.5px solid var(--border);
  border-radius: 20px;
  background: none;
  color: var(--text-secondary);
  font-family: var(--font-body);
  font-size: .75rem;
  font-weight: 500;
  cursor: pointer;
  transition: border-color var(--transition), color var(--transition),
              background var(--transition), transform var(--transition);
  white-space: nowrap;
}

.btn-rate:hover { transform: scale(1.06); }
.btn-rate:disabled { opacity: .5; cursor: not-allowed; transform: none; }

.btn-like:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-light);
}

.btn-dislike:hover {
  border-color: #e63946;
  color: #e63946;
  background: rgba(230,57,70,.1);
}

/* ── Nav Dropdown Menu ─────────────────────────────────────── */
.nav-menu {
  position: relative;
  flex-shrink: 0;
}

.nav-menu__toggle {
  width: 38px;
  height: 38px;
  border: 1.5px solid var(--border);
  border-radius: 8px;
  background: var(--surface);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-primary);
  transition: border-color var(--transition), background var(--transition);
}

.nav-menu__toggle:hover,
.nav-menu__toggle[aria-expanded="true"] {
  border-color: var(--accent);
  background: var(--accent-light);
  color: var(--accent);
}

.nav-menu__dropdown {
  display: none;
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  min-width: 240px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  z-index: 200;
  overflow: hidden;
  animation: dropIn .18s ease both;
}

.nav-menu__dropdown.open { display: block; }

@keyframes dropIn {
  from { opacity: 0; transform: translateY(-6px); }
  to   { opacity: 1; transform: translateY(0); }
}

.nav-menu__item {
  display: flex;
  align-items: center;
  gap: 9px;
  padding: 11px 16px;
  text-decoration: none;
  color: var(--text-primary);
  font-size: .875rem;
  font-family: var(--font-body);
  transition: background var(--transition), color var(--transition);
}

.nav-menu__item:hover { background: var(--bg); color: var(--accent); }
.nav-menu__item svg   { flex-shrink: 0; color: var(--text-secondary); }
.nav-menu__item:hover svg { color: var(--accent); }

.nav-menu__item--sub {
  padding: 8px 16px 8px 22px;
  font-size: .82rem;
  color: var(--text-secondary);
}

.nav-menu__item--whatsapp:hover { color: #25d366; }
.nav-menu__item--whatsapp:hover svg { color: #25d366; }

.nav-menu__divider {
  height: 1px;
  background: var(--border);
  margin: 4px 0;
}

.nav-menu__group { padding: 4px 0; }

.nav-menu__label {
  display: block;
  padding: 6px 16px 2px;
  font-size: .72rem;
  font-weight: 500;
  letter-spacing: .07em;
  text-transform: uppercase;
  color: var(--text-secondary);
}

.nav-menu__item--register {
  font-weight: 500;
  color: var(--accent);
}

.nav-menu__item--register:hover {
  background: var(--accent);
  color: #fff;
}

.nav-menu__item--register:hover svg { color: #fff; }

/* ── Footer ────────────────────────────────────────────────── */
.footer {
  border-top: 1px solid var(--border);
  background: var(--surface);
  padding: 20px 24px;
}

.footer__inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.footer__copy {
  font-size: .82rem;
  color: var(--text-secondary);
}

.footer__copy a {
  color: var(--accent);
  text-decoration: none;
}

.footer__copy a:hover { text-decoration: underline; }

.footer__links {
  display: flex;
  align-items: center;
  gap: 18px;
  flex-wrap: wrap;
}

.footer__links a {
  font-size: .82rem;
  color: var(--text-secondary);
  text-decoration: none;
  transition: color var(--transition);
}

.footer__links a:hover { color: var(--accent); }

@media (max-width: 600px) {
  .footer__inner { flex-direction: column; align-items: flex-start; gap: 10px; }
  .nav-menu__dropdown { right: -8px; min-width: 220px; }
}

/* ── Download modal ────────────────────────────────────────── */
.dl-modal-overlay {
  position: fixed;
  inset: 0;
  z-index: 9000;
  background: rgba(0,0,0,.55);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
  backdrop-filter: blur(3px);
}

.dl-modal-overlay[hidden] { display: none; }

.dl-modal {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 32px 28px 28px;
  width: 100%;
  max-width: 400px;
  position: relative;
  box-shadow: var(--shadow-lg);
  animation: fadeUp .22s ease both;
}

.dl-close--top {
  position: absolute;
  top: 14px;
  right: 14px;
  background: none;
  border: none;
  cursor: pointer;
  color: var(--text-secondary);
  font-size: .85rem;
  padding: 4px 8px;
  border-radius: 6px;
  line-height: 1;
  transition: color var(--transition), background var(--transition);
}

.dl-close--top:hover { color: var(--text-primary); background: var(--border); }

.dl-modal__icon {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: var(--accent-light);
  color: var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 16px;
}

.dl-modal__title {
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 600;
  text-align: center;
  margin-bottom: 8px;
}

.dl-modal__sub {
  font-size: .88rem;
  color: var(--text-secondary);
  text-align: center;
  margin-bottom: 24px;
  line-height: 1.5;
}

.dl-modal__btns {
  display: flex;
  gap: 10px;
}

.dl-btn {
  flex: 1;
  padding: 10px 16px;
  border-radius: 8px;
  font-family: var(--font-body);
  font-size: .88rem;
  font-weight: 500;
  cursor: pointer;
  border: 1.5px solid var(--border);
  transition: background var(--transition), color var(--transition), border-color var(--transition), transform var(--transition);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
}

.dl-btn--no {
  background: var(--surface);
  color: var(--text-secondary);
}

.dl-btn--no:hover {
  border-color: var(--text-secondary);
  color: var(--text-primary);
  transform: scale(1.02);
}

.dl-btn--yes {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}

.dl-btn--yes:hover {
  background: var(--accent-hover);
  border-color: var(--accent-hover);
  transform: scale(1.02);
}

.dl-btn--submit {
  width: 100%;
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
  padding: 11px 20px;
  font-size: .9rem;
  margin-top: 4px;
}

.dl-btn--submit:hover {
  background: var(--accent-hover);
  border-color: var(--accent-hover);
  transform: scale(1.01);
}

.dl-btn--submit:disabled { opacity: .6; cursor: not-allowed; transform: none; }

.dl-form { display: flex; flex-direction: column; gap: 14px; }

.dl-field { display: flex; flex-direction: column; gap: 5px; }

.dl-field label {
  font-size: .82rem;
  font-weight: 500;
  color: var(--text-primary);
}

.dl-field input {
  padding: 9px 12px;
  border: 1.5px solid var(--border);
  border-radius: 8px;
  background: var(--surface);
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: .88rem;
  outline: none;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.dl-field input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-light);
}

.dl-field__hint {
  font-size: .74rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

.dl-field__hint code {
  background: var(--border);
  padding: 1px 5px;
  border-radius: 4px;
  font-size: .76rem;
}

.dl-error {
  font-size: .82rem;
  color: #e63946;
  background: rgba(230,57,70,.1);
  border: 1px solid rgba(230,57,70,.25);
  border-radius: 6px;
  padding: 8px 12px;
  margin: 0;
}

.dl-back {
  background: none;
  border: none;
  font-size: .8rem;
  color: var(--text-secondary);
  cursor: pointer;
  padding: 8px 0 0;
  font-family: var(--font-body);
  transition: color var(--transition);
}

.dl-back:hover { color: var(--accent); }

@media (max-width: 480px) {
  .dl-modal { padding: 24px 18px 20px; }
  .dl-modal__btns { flex-direction: column; }
}