* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
[hidden] { display: none !important; }
body {
  font-family: var(--font);
  background: var(--cream);
  color: var(--ink);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
}
h1, h2, h3, h4 { font-family: var(--serif); margin: 0; line-height: 1.2; }
a { color: var(--teal); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ---------------- Navbar ---------------- */
.navbar {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(253, 248, 240, 0.94);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line);
}
.navbar-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0.65rem clamp(0.8rem, 3vw, 1.6rem);
  display: flex;
  align-items: center;
  gap: 1rem;
}
.logo {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  font-weight: 800;
  font-size: 1.05rem;
  letter-spacing: -0.02em;
  color: var(--ink);
  flex: none;
}
.logo:hover { text-decoration: none; }
.logo-mark {
  width: 34px;
  height: 34px;
  border-radius: 10px;
  display: grid;
  place-items: center;
  font-size: 1rem;
  background: linear-gradient(135deg, var(--teal), var(--violet) 55%, var(--coral));
  color: #fff;
  box-shadow: 0 8px 16px -10px rgba(122, 92, 255, 0.9);
}
.logo small {
  display: block;
  font-size: 0.62rem;
  letter-spacing: 0.13em;
  text-transform: uppercase;
  color: var(--ink-soft);
  font-weight: 700;
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  flex: 1;
  overflow-x: auto;
  scrollbar-width: none;
}
.nav-links::-webkit-scrollbar { display: none; }
.nav-link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.5rem 0.85rem;
  border-radius: 999px;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--ink-soft);
  white-space: nowrap;
  border: none;
  background: transparent;
  cursor: pointer;
}
.nav-link:hover { background: #fff; color: var(--ink); text-decoration: none; }
.nav-link.active { background: var(--teal); color: #fff; }
.nav-link .count {
  background: var(--coral);
  color: #fff;
  border-radius: 999px;
  padding: 0 0.4rem;
  font-size: 0.68rem;
  font-weight: 800;
  min-width: 18px;
  text-align: center;
}
.nav-user {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex: none;
}
.avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  background: var(--teal-soft);
  color: var(--teal-dark);
  font-weight: 800;
  font-size: 0.9rem;
  overflow: hidden;
  flex: none;
}
.avatar img { width: 100%; height: 100%; object-fit: cover; }
.nav-user-name { font-size: 0.85rem; font-weight: 700; max-width: 120px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

@media (max-width: 700px) {
  .nav-user-name { display: none; }
  .nav-link span.label { display: none; }
  .nav-link { padding: 0.5rem 0.7rem; font-size: 1rem; }
  .logo small { display: none; }
}

/* ---------------- Layout ---------------- */
.page { max-width: 1200px; margin: 0 auto; padding: 1.4rem clamp(0.8rem, 3vw, 1.6rem) 4rem; }
.page-head { display: flex; flex-wrap: wrap; align-items: flex-end; justify-content: space-between; gap: 1rem; margin-bottom: 1.2rem; }
.page-head h1 { font-size: clamp(1.6rem, 3vw, 2.1rem); letter-spacing: -0.02em; }
.page-head p { margin: 0.2rem 0 0; color: var(--ink-soft); font-size: 0.92rem; }

.card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.2rem;
}
.card-sm { border-radius: var(--radius-sm); padding: 1rem; }

/* ---------------- Auth screen ---------------- */
.auth-screen {
  min-height: calc(100vh - 62px);
  display: grid;
  place-items: center;
  padding: 2rem 1rem;
  background:
    radial-gradient(circle at 12% 18%, rgba(242, 169, 59, 0.35), transparent 45%),
    radial-gradient(circle at 88% 82%, rgba(122, 92, 255, 0.3), transparent 45%);
}
.auth-box {
  width: min(440px, 100%);
  background: #fff;
  border-radius: 24px;
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
  padding: 1.8rem;
}
.auth-box h2 { font-size: 1.7rem; margin-bottom: 0.3rem; }
.auth-box .sub { color: var(--ink-soft); font-size: 0.9rem; margin: 0 0 1.2rem; }
.auth-tabs { display: flex; gap: 0.4rem; background: var(--cream-2); padding: 0.3rem; border-radius: 999px; margin-bottom: 1.2rem; }
.auth-tabs button {
  flex: 1;
  border: none;
  background: transparent;
  padding: 0.55rem;
  border-radius: 999px;
  font-weight: 700;
  font-size: 0.9rem;
  color: var(--ink-soft);
  cursor: pointer;
}
.auth-tabs button.active { background: #fff; color: var(--ink); box-shadow: var(--shadow-sm); }
.auth-foot { text-align: center; font-size: 0.82rem; color: var(--ink-soft); margin-top: 1rem; }
.auth-foot a { display: inline-block; padding: 0.4rem 0.6rem; }

/* ---------------- Books grid ---------------- */
.toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  align-items: center;
  margin-bottom: 1.2rem;
}
.search-wrap { position: relative; flex: 1; min-width: 220px; }
.search-wrap .input { padding-left: 2.3rem; }
.search-wrap .ico { position: absolute; left: 0.8rem; top: 50%; transform: translateY(-50%); opacity: 0.55; }
.chip-row { display: flex; gap: 0.4rem; flex-wrap: wrap; }
.chip {
  border: 1px solid var(--line);
  background: #fff;
  border-radius: 999px;
  padding: 0.35rem 0.8rem;
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--ink-soft);
  cursor: pointer;
}
.chip:hover { border-color: var(--teal); color: var(--teal-dark); }
.chip.active { background: var(--teal); border-color: var(--teal); color: #fff; }

.books-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(215px, 1fr));
  gap: 1rem;
}
.book {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: transform 0.18s ease, box-shadow 0.18s ease;
}
.book:hover { transform: translateY(-3px); box-shadow: 0 26px 44px -34px rgba(27, 42, 47, 0.8); }
.book-cover {
  position: relative;
  aspect-ratio: 3 / 4;
  background: linear-gradient(150deg, var(--teal-soft), var(--amber-soft));
  display: grid;
  place-items: center;
  overflow: hidden;
  cursor: pointer;
}
.book-cover img { width: 100%; height: 100%; object-fit: cover; }
.book-cover .placeholder {
  padding: 1rem;
  text-align: center;
  font-family: var(--serif);
  font-size: 1rem;
  font-weight: 700;
  color: var(--teal-dark);
  opacity: 0.75;
  line-height: 1.25;
}
.book-cover .book-badge {
  position: absolute;
  top: 0.6rem;
  left: 0.6rem;
  box-shadow: 0 4px 10px -4px rgba(0, 0, 0, 0.4);
}
.book-body { padding: 0.85rem; display: flex; flex-direction: column; gap: 0.35rem; flex: 1; }
.book-title { font-family: var(--serif); font-weight: 700; font-size: 1rem; line-height: 1.25; }
.book-author { font-size: 0.78rem; color: var(--ink-soft); font-weight: 600; }
.book-comment {
  font-size: 0.82rem;
  color: var(--ink-soft);
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.book-foot {
  margin-top: auto;
  padding-top: 0.55rem;
  border-top: 1px dashed var(--line);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.4rem;
  font-size: 0.76rem;
  color: var(--ink-soft);
  font-weight: 600;
}
.book-owner { display: flex; align-items: center; gap: 0.35rem; min-width: 0; }
.book-owner .avatar { width: 22px; height: 22px; font-size: 0.62rem; }
.book-owner span { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.book-actions { display: flex; gap: 0.3rem; }

.icon-btn {
  border: 1px solid var(--line);
  background: #fff;
  border-radius: 9px;
  width: 30px;
  height: 30px;
  display: grid;
  place-items: center;
  cursor: pointer;
  font-size: 0.85rem;
  color: var(--ink-soft);
}
.icon-btn:hover { border-color: var(--teal); color: var(--teal-dark); }
.icon-btn.danger:hover { border-color: var(--coral); color: var(--danger); }

/* ---------------- Map ---------------- */
.map-shell { position: relative; border-radius: var(--radius); overflow: hidden; border: 1px solid var(--line); background: #fff; }
#map { height: min(68vh, 620px); width: 100%; }
.map-filters {
  position: absolute;
  top: 0.8rem;
  left: 0.8rem;
  z-index: 500;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(8px);
  border-radius: 14px;
  padding: 0.7rem;
  box-shadow: var(--shadow-sm);
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
  align-items: center;
  max-width: calc(100% - 1.6rem);
}
.map-filters .input, .map-filters .select { padding: 0.4rem 0.6rem; font-size: 0.84rem; width: auto; border-radius: 9px; }
.map-filters .input { min-width: 150px; }
.map-legend {
  position: absolute;
  bottom: 0.8rem;
  right: 0.8rem;
  z-index: 500;
  background: rgba(255, 255, 255, 0.95);
  border-radius: 12px;
  padding: 0.55rem 0.75rem;
  font-size: 0.76rem;
  font-weight: 600;
  color: var(--ink-soft);
  box-shadow: var(--shadow-sm);
  display: grid;
  gap: 0.25rem;
}
.map-legend i { display: inline-block; width: 9px; height: 9px; border-radius: 50%; margin-right: 0.4rem; }
.leaflet-popup-content { font-family: var(--font); margin: 0.75rem 0.9rem; }
.popup-title { font-family: var(--serif); font-weight: 700; font-size: 0.95rem; margin-bottom: 0.15rem; }
.popup-meta { font-size: 0.78rem; color: var(--ink-soft); margin-bottom: 0.5rem; }
.popup-actions { display: flex; gap: 0.35rem; margin-top: 0.5rem; }
.marker-pin {
  width: 30px; height: 30px; border-radius: 50% 50% 50% 6px;
  transform: rotate(45deg);
  border: 2px solid #fff;
  box-shadow: 0 4px 12px -3px rgba(0,0,0,0.5);
  display: grid; place-items: center;
}
.marker-pin span { transform: rotate(-45deg); font-size: 0.8rem; }

/* ---------------- Messages ---------------- */
.chat-layout {
  display: grid;
  grid-template-columns: 300px 1fr;
  gap: 1rem;
  height: min(72vh, 640px);
}
.thread-list { overflow-y: auto; display: flex; flex-direction: column; gap: 0.4rem; }
.thread {
  display: flex;
  gap: 0.6rem;
  align-items: center;
  padding: 0.65rem;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  cursor: pointer;
  background: #fff;
  text-align: left;
  width: 100%;
  font-family: inherit;
}
.thread:hover { border-color: var(--line); }
.thread.active { border-color: var(--teal); background: var(--teal-soft); }
.thread-body { min-width: 0; flex: 1; }
.thread-name { font-weight: 700; font-size: 0.9rem; display: flex; justify-content: space-between; gap: 0.4rem; }
.thread-name time { font-size: 0.7rem; font-weight: 600; color: var(--ink-soft); flex: none; }
.thread-preview { font-size: 0.8rem; color: var(--ink-soft); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.chat-panel { display: flex; flex-direction: column; overflow: hidden; }
.chat-head { padding: 0.75rem 1rem; border-bottom: 1px solid var(--line); display: flex; align-items: center; justify-content: space-between; gap: 0.5rem; }
.chat-head h3 { font-size: 1.05rem; }
.chat-scroll { flex: 1; overflow-y: auto; padding: 1rem; display: flex; flex-direction: column; gap: 0.5rem; background: var(--cream); }
.bubble-msg {
  max-width: 72%;
  padding: 0.55rem 0.85rem;
  border-radius: 14px;
  font-size: 0.9rem;
  line-height: 1.4;
  white-space: pre-wrap;
  word-wrap: break-word;
}
.bubble-msg.mine { align-self: flex-end; background: var(--teal); color: #fff; border-bottom-right-radius: 4px; }
.bubble-msg.theirs { align-self: flex-start; background: #fff; border: 1px solid var(--line); border-bottom-left-radius: 4px; }
.bubble-msg time { display: block; font-size: 0.64rem; opacity: 0.7; margin-top: 0.2rem; }
.chat-form { display: flex; gap: 0.5rem; padding: 0.75rem; border-top: 1px solid var(--line); background: #fff; }
.chat-form .input { flex: 1; }
.chat-empty { display: grid; place-items: center; height: 100%; color: var(--ink-soft); font-size: 0.9rem; text-align: center; padding: 2rem; }

/* ---------------- Profile ---------------- */
.profile-head { display: flex; gap: 1.2rem; align-items: flex-start; flex-wrap: wrap; }
.profile-head .avatar { width: 84px; height: 84px; font-size: 1.8rem; border-radius: 24px; }
.profile-stats { display: flex; gap: 1.6rem; flex-wrap: wrap; margin-top: 0.8rem; }
.profile-stats div strong { display: block; font-family: var(--serif); font-size: 1.3rem; }
.profile-stats div span { font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.07em; font-weight: 700; color: var(--ink-soft); }

.tabs { display: flex; gap: 0.3rem; border-bottom: 1px solid var(--line); margin-bottom: 1.2rem; overflow-x: auto; }
.tab {
  border: none;
  background: transparent;
  padding: 0.7rem 1rem;
  font-weight: 700;
  font-size: 0.9rem;
  color: var(--ink-soft);
  cursor: pointer;
  border-bottom: 3px solid transparent;
  white-space: nowrap;
}
.tab.active { color: var(--teal-dark); border-bottom-color: var(--teal); }

/* ---------------- Modal ---------------- */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(20, 34, 38, 0.55);
  backdrop-filter: blur(4px);
  z-index: 2000;
  display: grid;
  place-items: center;
  padding: 1rem;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.18s ease;
}
.modal-backdrop.open { opacity: 1; pointer-events: auto; }
.modal {
  background: var(--cream);
  border-radius: 22px;
  width: min(560px, 100%);
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: 0 40px 90px -40px rgba(0, 0, 0, 0.8);
  transform: translateY(12px);
  transition: transform 0.18s ease;
}
.modal-backdrop.open .modal { transform: translateY(0); }
.modal-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.1rem 1.3rem 0.4rem;
}
.modal-head h2 { font-size: 1.35rem; }
.modal-body { padding: 0.8rem 1.3rem 1.3rem; }
.modal-close { border: none; background: transparent; font-size: 1.4rem; cursor: pointer; color: var(--ink-soft); line-height: 1; }
.modal-close:hover { color: var(--ink); }

.cover-picker {
  display: grid;
  grid-template-columns: 96px 1fr;
  gap: 0.9rem;
  align-items: center;
  padding: 0.8rem;
  border: 2px dashed var(--line);
  border-radius: var(--radius-sm);
  cursor: pointer;
  background: #fff;
  margin-bottom: 0.9rem;
}
.cover-picker:hover { border-color: var(--teal); }
.cover-preview {
  width: 96px;
  height: 128px;
  border-radius: 10px;
  background: var(--cream-2);
  display: grid;
  place-items: center;
  overflow: hidden;
  font-size: 1.6rem;
  color: var(--ink-soft);
}
.cover-preview img { width: 100%; height: 100%; object-fit: cover; }
.cover-picker strong { display: block; font-size: 0.9rem; }
.cover-picker small { color: var(--ink-soft); font-size: 0.78rem; }

.two-col { display: grid; grid-template-columns: 1fr 1fr; gap: 0.8rem; }
@media (max-width: 520px) { .two-col { grid-template-columns: 1fr; } }

.geo-row { display: flex; gap: 0.5rem; align-items: center; }
.geo-row .input { flex: 1; }
.geo-results {
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: #fff;
  max-height: 190px;
  overflow-y: auto;
  margin-top: 0.4rem;
}
.geo-results button {
  display: block;
  width: 100%;
  background: transparent;
  border: none;
  border-bottom: 1px solid var(--cream-2);
  padding: 0.55rem 0.7rem;
  text-align: left;
  font-size: 0.82rem;
  cursor: pointer;
  color: var(--ink);
}
.geo-results button:hover { background: var(--teal-soft); }
.geo-results button:last-child { border-bottom: none; }

/* ---------------- Misc ---------------- */
.empty {
  text-align: center;
  padding: 3rem 1.5rem;
  color: var(--ink-soft);
  background: #fff;
  border: 1px dashed var(--line);
  border-radius: var(--radius);
}
.empty .big { font-size: 2.2rem; margin-bottom: 0.5rem; }
.empty h3 { font-size: 1.15rem; color: var(--ink); margin-bottom: 0.3rem; }
.empty p { margin: 0 auto 1rem; max-width: 36ch; font-size: 0.9rem; }

.spinner {
  width: 26px; height: 26px;
  border: 3px solid var(--cream-2);
  border-top-color: var(--teal);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
  margin: 2rem auto;
}
@keyframes spin { to { transform: rotate(360deg); } }

.toast-wrap {
  position: fixed;
  bottom: 1.2rem;
  left: 50%;
  transform: translateX(-50%);
  z-index: 3000;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  align-items: center;
  pointer-events: none;
}
.toast {
  background: var(--ink);
  color: #fff;
  padding: 0.6rem 1.1rem;
  border-radius: 999px;
  font-size: 0.85rem;
  font-weight: 600;
  box-shadow: var(--shadow);
  animation: toastIn 0.2s ease;
}
.toast.err { background: var(--danger); }
.toast.ok { background: var(--ok); }
@keyframes toastIn { from { opacity: 0; transform: translateY(8px); } }

.hidden { display: none !important; }

.row { display: flex; gap: 0.6rem; align-items: center; }
.between { display: flex; justify-content: space-between; align-items: center; gap: 0.6rem; }
.muted { color: var(--ink-soft); }
.small { font-size: 0.82rem; }
.mt1 { margin-top: 0.6rem; }
.mt2 { margin-top: 1.2rem; }
.mb1 { margin-bottom: 0.6rem; }
.mb2 { margin-bottom: 1.2rem; }