:root {
  --ink: #2d241f;
  --muted: #766a60;
  --paper: #f7f1e7;
  --card: #fffdf9;
  --line: #dfd2c3;
  --wood: #7a5137;
  --wood-dark: #543522;
  --rose: #9b435b;
  --gold: #b27a20;
  --danger: #a13a35;
  --shadow: 0 18px 55px rgba(69, 44, 27, .13);
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  background:
    radial-gradient(circle at 90% 0%, rgba(164, 118, 81, .22), transparent 31rem),
    linear-gradient(180deg, #f9f4ec, var(--paper));
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.5;
}
button, input, select, textarea { font: inherit; }
button { cursor: pointer; }
[hidden] { display: none !important; }
.container { width: min(1180px, calc(100% - 2rem)); margin-inline: auto; }
h1, h2 { font-family: Georgia, "Times New Roman", serif; }
.eyebrow { margin: 0 0 .4rem; color: var(--wood); font-size: .75rem; font-weight: 850; letter-spacing: .13em; text-transform: uppercase; }
.muted, .hero-copy, .result-info { color: var(--muted); }

.login-view { min-height: 100vh; display: grid; place-items: center; padding: 1rem; }
.login-card {
  width: min(460px, 100%);
  padding: clamp(1.5rem, 5vw, 2.6rem);
  border: 1px solid var(--line);
  border-radius: 1.5rem;
  background: rgba(255, 253, 249, .94);
  box-shadow: var(--shadow);
  text-align: center;
}
.brand-mark {
  width: 4rem; height: 4rem; margin: 0 auto 1rem;
  display: grid; place-items: center;
  border-radius: 50%;
  color: white; background: var(--wood);
  font: 700 2rem Georgia, serif;
}
.login-card h1 { margin: .2rem 0 .8rem; font-size: clamp(2.3rem, 8vw, 4rem); line-height: .95; }
.stack { display: grid; gap: 1rem; margin-top: 1.6rem; text-align: left; }

.hero { padding: 3.6rem 0 2rem; }
.hero-inner { display: flex; justify-content: space-between; align-items: flex-start; gap: 2rem; }
.hero h1 { margin: 0; font-size: clamp(2.8rem, 7vw, 5.6rem); line-height: .9; letter-spacing: -.045em; }
.hero-copy { margin: 1rem 0 0; font-size: 1.05rem; }
.hero-actions { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: .75rem; }

.button, .icon-button, .edit-button {
  border: 0; border-radius: .8rem; font-weight: 760; transition: transform .15s ease, background .15s ease;
}
.button { padding: .76rem 1rem; }
.button:active, .edit-button:active { transform: translateY(1px); }
.primary { color: white; background: var(--wood); }
.primary:hover { background: var(--wood-dark); }
.secondary { color: var(--wood-dark); background: #eadfce; }
.ghost { color: var(--ink); background: rgba(255,255,255,.7); border: 1px solid var(--line); }
.danger { color: white; background: var(--danger); }

label { display: grid; gap: .4rem; color: var(--muted); font-size: .9rem; font-weight: 700; }
input, select, textarea {
  width: 100%; padding: .8rem .9rem;
  border: 1px solid var(--line); border-radius: .8rem;
  color: var(--ink); background: #fffdfa; outline: none;
}
input:focus, select:focus, textarea:focus { border-color: var(--wood); box-shadow: 0 0 0 3px rgba(122,81,55,.14); }
textarea { resize: vertical; }

.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1rem; margin: 1rem 0 1.5rem; }
.stats article { padding: 1.2rem; border: 1px solid var(--line); border-radius: 1rem; background: rgba(255,253,249,.9); }
.stats strong { display: block; font: 700 2.15rem Georgia, serif; }
.stats span { color: var(--muted); }

.toolbar {
  display: grid; grid-template-columns: minmax(15rem, 2fr) repeat(3, minmax(10rem, 1fr));
  gap: .75rem; padding: 1rem; border: 1px solid var(--line);
  border-radius: 1.1rem; background: var(--card); box-shadow: var(--shadow);
}
.result-info { min-height: 1.5rem; margin: 1.2rem .2rem; }
.book-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(230px, 1fr)); gap: 1.2rem; padding-bottom: 4rem; }
.book-card { overflow: hidden; border: 1px solid var(--line); border-radius: 1.15rem; background: var(--card); box-shadow: var(--shadow); transition: transform .18s ease; }
.book-card:hover { transform: translateY(-4px); }
.cover-frame { position: relative; aspect-ratio: 4 / 5; overflow: hidden; background: #e7daca; }
.book-cover { width: 100%; height: 100%; object-fit: cover; display: block; }
.status-badge, .favorite-badge { position: absolute; top: .7rem; border-radius: 999px; color: white; font-size: .72rem; font-weight: 850; }
.status-badge { left: .7rem; padding: .36rem .62rem; background: rgba(45,36,31,.82); backdrop-filter: blur(5px); }
.favorite-badge { right: .7rem; width: 2rem; height: 2rem; display: grid; place-items: center; background: var(--rose); }
.book-content { padding: 1rem; }
.book-genre { margin: 0 0 .35rem; color: var(--wood); font-size: .72rem; font-weight: 850; letter-spacing: .08em; text-transform: uppercase; }
.book-title { margin: 0; font-size: 1.35rem; line-height: 1.15; }
.book-author { margin: .4rem 0 .75rem; color: var(--muted); }
.book-meta, .book-bottom { display: flex; align-items: center; justify-content: space-between; gap: .7rem; }
.book-meta { color: var(--muted); font-size: .82rem; }
.book-description { min-height: 4.2rem; color: var(--muted); font-size: .9rem; display: -webkit-box; overflow: hidden; -webkit-box-orient: vertical; -webkit-line-clamp: 3; }
.book-rating { color: var(--gold); letter-spacing: .04em; }
.edit-button { padding: .45rem .65rem; color: var(--wood-dark); background: #eee2d2; }
.book-tags { display: flex; flex-wrap: wrap; gap: .35rem; margin-top: .8rem; }
.tag { padding: .23rem .48rem; border-radius: 999px; color: var(--muted); background: #eee7dd; font-size: .7rem; }
.empty-state { padding: 4rem 1rem 6rem; text-align: center; color: var(--muted); }
.empty-icon { font-size: 3rem; }

dialog {
  width: min(820px, calc(100% - 1rem)); max-height: calc(100vh - 1rem);
  padding: 0; border: 0; border-radius: 1.25rem; background: var(--card);
  box-shadow: 0 30px 90px rgba(0,0,0,.32);
}
dialog::backdrop { background: rgba(38,28,21,.68); backdrop-filter: blur(4px); }
.book-form { padding: 1.4rem; overflow: auto; }
.dialog-header { display: flex; align-items: flex-start; justify-content: space-between; margin-bottom: 1rem; }
.dialog-header h2 { margin: .1rem 0; font-size: 2rem; }
.icon-button { padding: .15rem .6rem; color: var(--muted); background: transparent; font-size: 1.9rem; }
.isbn-panel { margin-bottom: 1rem; padding: 1rem; border: 1px solid var(--line); border-radius: 1rem; background: #f2e9dd; }
.inline-field { display: grid; grid-template-columns: minmax(12rem, 1fr) repeat(3, auto); gap: .6rem; }
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: .9rem; }
.wide { grid-column: 1 / -1; }
.checkbox { display: flex; flex-direction: row; align-items: center; }
.checkbox input { width: auto; }
.field-hint { font-size: .75rem; font-weight: 500; }
.dialog-actions { display: flex; align-items: center; gap: .7rem; margin-top: 1.2rem; }
.spacer { flex: 1; }
.form-message, .small-message { min-height: 1.2rem; margin: .7rem 0 0; color: var(--danger); }
.toast {
  position: fixed; z-index: 20; right: 1rem; bottom: 1rem;
  max-width: min(420px, calc(100% - 2rem)); padding: .85rem 1rem;
  border-radius: .8rem; color: white; background: var(--wood-dark); box-shadow: var(--shadow);
}

@media (max-width: 850px) {
  .toolbar { grid-template-columns: 1fr 1fr; }
  .toolbar input { grid-column: 1 / -1; }
}
@media (max-width: 640px) {
  .hero-inner { display: grid; }
  .hero-actions { justify-content: flex-start; }
  .stats { grid-template-columns: 1fr 1fr; }
  .toolbar, .form-grid { grid-template-columns: 1fr; }
  .toolbar input, .wide { grid-column: auto; }
  .inline-field { grid-template-columns: 1fr; }
}


.scanner-dialog { width: min(680px, calc(100% - 1rem)); }
.scanner-panel { padding: 1.25rem; }
.scanner-stage {
  position: relative;
  overflow: hidden;
  aspect-ratio: 4 / 3;
  border-radius: 1rem;
  background: #17120f;
}
#scannerVideo {
  width: 100%;
  height: 100%;
  display: block;
  object-fit: cover;
}
.scanner-guide {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  pointer-events: none;
}
.scanner-guide::before {
  content: "";
  width: min(84%, 520px);
  height: 30%;
  min-height: 90px;
  border: 3px solid rgba(255,255,255,.92);
  border-radius: .8rem;
  box-shadow: 0 0 0 999px rgba(0,0,0,.25);
}
.scanner-guide span {
  position: absolute;
  width: min(78%, 480px);
  height: 2px;
  background: #e75d5d;
  box-shadow: 0 0 12px rgba(231,93,93,.9);
  animation: scanner-line 2s ease-in-out infinite alternate;
}
.scanner-help {
  margin: .85rem 0 .25rem;
  color: var(--muted);
  text-align: center;
}
@keyframes scanner-line {
  from { transform: translateY(-42px); }
  to { transform: translateY(42px); }
}


.visually-hidden {
  position: absolute !important;
  width: 1px !important;
  height: 1px !important;
  padding: 0 !important;
  margin: -1px !important;
  overflow: hidden !important;
  clip: rect(0, 0, 0, 0) !important;
  white-space: nowrap !important;
  border: 0 !important;
}


.load-more-sentinel {
  margin: -2rem 0 4rem;
  padding: 1rem;
  color: var(--muted);
  text-align: center;
}
.load-more-sentinel::before {
  content: "";
  display: inline-block;
  width: .9rem;
  height: .9rem;
  margin-right: .55rem;
  border: 2px solid var(--line);
  border-top-color: var(--wood);
  border-radius: 50%;
  vertical-align: -.12rem;
  animation: loading-spin .8s linear infinite;
}
@keyframes loading-spin {
  to { transform: rotate(360deg); }
}
.book-cover {
  background: linear-gradient(110deg, #e7daca 25%, #f2e8dc 45%, #e7daca 65%);
  background-size: 220% 100%;
}
.book-cover:not([src]),
.book-cover[src=""] {
  animation: cover-placeholder 1.2s linear infinite;
}
@keyframes cover-placeholder {
  to { background-position-x: -220%; }
}

.login-signature {

    margin-top: 3rem;

    text-align: center;

    font-size: 0.78rem;

    font-weight: 300;

    letter-spacing: 0.12em;

    color: rgba(80, 80, 80, 0.45);

    font-family: -apple-system, BlinkMacSystemFont,

                 "Segoe UI", Roboto, Helvetica, Arial, sans-serif;

    user-select: none;

}

.login-signature span {

    font-size: 0.9rem;

}


.login-logo {
    display: flex;
    justify-content: center;
    margin-bottom: 1.8rem;
}

.login-logo img {
    width: 260px;
    max-width: 85%;
    height: auto;
    display: block;
}