:root {
  color-scheme: dark;
  font-family: Inter, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.5;
  --bg: #0c1017;
  --bg-accent: #131a24;
  --surface: rgba(20, 27, 39, 0.9);
  --surface-strong: #1a2230;
  --surface-soft: #202b3c;
  --border: rgba(147, 167, 196, 0.22);
  --border-strong: rgba(147, 167, 196, 0.36);
  --text: #edf2fb;
  --muted: #a9b5c9;
  --soft: #d5deeb;
  --accent: #8ab4ff;
  --accent-strong: #5d8ef0;
  --danger: #e56b6f;
  --danger-strong: #c64e58;
  --focus: #b6cbff;
  --shadow: 0 20px 50px rgba(0, 0, 0, 0.35);
  --cover-start: #38506d;
  --cover-end: #192433;
}

* {
  box-sizing: border-box;
}

html {
  background:
    radial-gradient(circle at top, rgba(91, 128, 194, 0.22), transparent 30%),
    linear-gradient(180deg, var(--bg-accent) 0%, var(--bg) 30%, #090d13 100%);
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--text);
}

a {
  color: var(--accent);
}

a:hover {
  color: var(--focus);
}

.app-shell {
  min-height: 100vh;
  padding: 2rem;
}

.page-area {
  margin: 0 auto;
  max-width: 72rem;
}

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.25rem;
  margin: 0 auto 3rem;
  max-width: 72rem;
}

.site-header > .brand {
  color: var(--text);
  font-size: 1rem;
  font-weight: 800;
  letter-spacing: 0.16em;
  text-decoration: none;
  text-transform: uppercase;
}

.nav-list {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.nav-list > .form {
  display: contents;
}

.nav-list > .item,
.nav-list > .form > .item {
  padding: 0.55rem 0.8rem;
  border: 1px solid transparent;
  border-radius: 999px;
  color: var(--muted);
  font-size: 0.95rem;
  font-weight: 600;
  text-decoration: none;
  transition: border-color 120ms ease, background-color 120ms ease, color 120ms ease;
}

.nav-list > .item:hover,
.nav-list > .item:focus-visible,
.nav-list > .item.-current,
.nav-list > .form > .item:hover,
.nav-list > .form > .item:focus-visible,
.nav-list > .form > .item.-current {
  border-color: var(--border);
  background: rgba(138, 180, 255, 0.1);
  color: var(--text);
}

.nav-list > .form > .item-button {
  background: transparent;
  cursor: pointer;
  font: inherit;
}

.surface-panel {
  padding: 1.75rem;
  border: 1px solid var(--border);
  border-radius: 1.5rem;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.03), rgba(255, 255, 255, 0)),
    var(--surface);
  box-shadow: var(--shadow);
  backdrop-filter: blur(14px);
}

.page-intro {
  display: grid;
  gap: 0.9rem;
}

.page-intro > .kicker {
  margin: 0;
  color: var(--accent);
  font-size: 0.8rem;
  font-weight: 800;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.page-intro > .title {
  margin: 0;
  max-width: 18ch;
  font-size: clamp(2.2rem, 5vw, 4.4rem);
  line-height: 0.95;
  letter-spacing: -0.03em;
}

.page-intro > .body {
  margin: 0;
  max-width: 42rem;
  color: var(--muted);
  font-size: 1.02rem;
}

.section-title {
  margin: 0;
  color: var(--text);
  font-size: 1.45rem;
  line-height: 1.1;
}

.catalog-page {
  display: grid;
  gap: 2rem;
}

.catalog-bar {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 1.5rem;
}

.empty-panel {
  max-width: 42rem;
}

.auth-page,
.upload-page {
  display: flex;
  justify-content: center;
}

.form-panel {
  width: min(100%, 38rem);
}

.form-stack {
  display: grid;
  gap: 1rem;
  margin-top: 1.75rem;
}

.form-field {
  display: grid;
  gap: 0.45rem;
}

.form-field > .label {
  color: var(--soft);
  font-size: 0.92rem;
  font-weight: 700;
}

.form-field > .input {
  width: 100%;
  padding: 0.95rem 1rem;
  border: 1px solid var(--border);
  border-radius: 1rem;
  background: rgba(7, 12, 19, 0.66);
  color: var(--text);
  font: inherit;
  transition: border-color 120ms ease, box-shadow 120ms ease, background-color 120ms ease;
}

.form-field > .input:hover {
  border-color: var(--border-strong);
}

.form-field > .input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 0.2rem rgba(138, 180, 255, 0.16);
}

.form-field > .input.-file {
  padding-block: 0.75rem;
}

textarea.input {
  resize: vertical;
}

.message-box {
  margin-top: 1.5rem;
  padding: 0.95rem 1rem;
  border: 1px solid transparent;
  border-radius: 1rem;
}

.message-box.-error {
  border-color: rgba(229, 107, 111, 0.32);
  background: rgba(229, 107, 111, 0.13);
  color: #ffb8bc;
}

.message-box.-success {
  border-color: rgba(111, 214, 149, 0.32);
  background: rgba(111, 214, 149, 0.12);
  color: #baf3cf;
}

.upload-results {
  display: grid;
  gap: 1rem;
  margin-top: 1.5rem;
}

.upload-summary {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.upload-summary > span {
  padding: 0.55rem 0.75rem;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.04);
  color: var(--soft);
}

.upload-summary strong {
  color: var(--text);
}

.upload-result-list {
  display: grid;
  gap: 0.7rem;
}

.upload-result {
  padding: 0.85rem 1rem;
  border: 1px solid var(--border);
  border-radius: 1rem;
  background: rgba(255, 255, 255, 0.035);
}

.upload-result.-success {
  border-color: rgba(111, 214, 149, 0.32);
}

.upload-result.-duplicate {
  border-color: rgba(238, 194, 111, 0.34);
}

.upload-result.-error {
  border-color: rgba(229, 107, 111, 0.32);
}

.upload-result-header {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.6rem;
}

.upload-result .status {
  padding: 0.2rem 0.5rem;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.08);
  color: var(--soft);
  font-size: 0.78rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.upload-result .filename {
  overflow-wrap: anywhere;
}

.result-title,
.result-message {
  margin: 0.45rem 0 0;
  color: var(--muted);
}

.action-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.9rem 1.2rem;
  border: 1px solid transparent;
  border-radius: 999px;
  background: linear-gradient(180deg, var(--accent) 0%, var(--accent-strong) 100%);
  color: #081120;
  cursor: pointer;
  font: inherit;
  font-weight: 800;
  text-decoration: none;
  transition: transform 120ms ease, box-shadow 120ms ease, filter 120ms ease;
}

.action-button:hover,
.action-button:focus-visible {
  transform: translateY(-1px);
  box-shadow: 0 12px 24px rgba(93, 142, 240, 0.24);
  filter: brightness(1.04);
}

.action-button:focus-visible,
.book-card > .link:focus-visible,
.back-link:focus-visible {
  outline: 2px solid var(--focus);
  outline-offset: 0.2rem;
}

.action-button.-danger {
  background: linear-gradient(180deg, var(--danger) 0%, var(--danger-strong) 100%);
  color: #22080d;
}

.action-button.-compact {
  padding: 0.7rem 1rem;
  font-size: 0.92rem;
}

.support-copy {
  margin: 1.5rem 0 0;
  color: var(--muted);
}

.book-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(13rem, 1fr));
  gap: 1.35rem;
}

.author-list {
  display: grid;
  gap: 0.9rem;
}

.author-list > .author-link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem 1.1rem;
  border: 1px solid var(--border);
  border-radius: 1rem;
  background: rgba(255, 255, 255, 0.02);
  color: var(--text);
  text-decoration: none;
  transition: border-color 120ms ease, transform 120ms ease, background-color 120ms ease;
}

.author-list > .author-link:hover,
.author-list > .author-link:focus-visible {
  border-color: var(--border-strong);
  background: rgba(138, 180, 255, 0.08);
  transform: translateY(-1px);
}

.author-list > .author-link > .name {
  font-size: 1.02rem;
  font-weight: 700;
}

.author-list > .author-link > .count {
  color: var(--muted);
  font-size: 0.92rem;
  text-align: right;
}

.user-list {
  display: grid;
  gap: 0.85rem;
}

.user-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem;
  border: 1px solid var(--border);
  border-radius: 1rem;
  background: rgba(255, 255, 255, 0.025);
}

.user-row > .text {
  min-width: 0;
}

.user-row .name,
.user-row .meta {
  margin: 0;
}

.user-row .name {
  color: var(--text);
  font-size: 1.08rem;
}

.user-row .meta {
  margin-top: 0.25rem;
  color: var(--muted);
  font-size: 0.92rem;
}

.invite-create-panel,
.invite-list-panel {
  display: grid;
  gap: 1.4rem;
}

.invite-list {
  display: grid;
  gap: 0.85rem;
}

.invite-row {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem;
  border: 1px solid var(--border);
  border-radius: 1rem;
  background: rgba(255, 255, 255, 0.025);
}

.invite-row > .text {
  display: grid;
  min-width: 0;
  gap: 0.45rem;
}

.invite-link {
  overflow-wrap: anywhere;
  font-weight: 800;
}

.invite-row .note,
.invite-row .meta,
.empty-copy {
  margin: 0;
  color: var(--muted);
}

.invite-row .note {
  color: var(--soft);
}

.invite-row .meta {
  font-size: 0.92rem;
}

.permissions-panel {
  width: min(100%, 48rem);
}

.permission-list {
  display: grid;
  gap: 0.85rem;
  margin: 0;
  padding: 0;
  border: 0;
}

.field-legend {
  margin-bottom: 0.35rem;
  color: var(--soft);
  font-size: 0.92rem;
  font-weight: 800;
}

.permission-option {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 0.85rem;
  padding: 1rem;
  border: 1px solid var(--border);
  border-radius: 1rem;
  background: rgba(7, 12, 19, 0.34);
  cursor: pointer;
  transition: border-color 120ms ease, background-color 120ms ease;
}

.permission-option:hover,
.permission-option:focus-within {
  border-color: var(--border-strong);
  background: rgba(138, 180, 255, 0.08);
}

.permission-option > input {
  width: 1.1rem;
  height: 1.1rem;
  margin-top: 0.2rem;
  accent-color: var(--accent);
}

.permission-option > .text {
  display: grid;
  gap: 0.3rem;
}

.permission-option .label {
  color: var(--text);
  font-weight: 800;
}

.permission-option .description {
  color: var(--muted);
}

.permission-code {
  width: fit-content;
  padding: 0.18rem 0.45rem;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.05);
  color: var(--accent);
  font-size: 0.82rem;
}

.book-card {
  min-width: 0;
}

.book-card > .link {
  display: grid;
  gap: 0.9rem;
  height: 100%;
  padding: 1rem;
  border: 1px solid var(--border);
  border-radius: 1.35rem;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.035), rgba(255, 255, 255, 0)),
    var(--surface-strong);
  color: var(--text);
  text-decoration: none;
  box-shadow: 0 14px 30px rgba(0, 0, 0, 0.24);
  transition: transform 120ms ease, border-color 120ms ease, box-shadow 120ms ease;
}

.book-card > .link:hover,
.book-card > .link:focus-visible {
  transform: translateY(-3px);
  border-color: var(--border-strong);
  box-shadow: 0 18px 34px rgba(0, 0, 0, 0.34);
}

.book-card > .link > .cover {
  width: 100%;
  aspect-ratio: 3 / 4.2;
  border: 1px solid var(--border);
  border-radius: 1rem;
  object-fit: cover;
  background: linear-gradient(180deg, var(--surface-soft) 0%, var(--surface-strong) 100%);
}

.book-card > .link > .cover.-fallback {
  display: grid;
  place-items: center;
  background:
    radial-gradient(circle at top, rgba(138, 180, 255, 0.26), transparent 38%),
    linear-gradient(160deg, var(--cover-start) 0%, var(--cover-end) 100%);
}

.book-card > .link > .cover.-fallback > .initial {
  color: #f5f8ff;
  font-size: clamp(2.4rem, 8vw, 3.8rem);
  font-weight: 800;
  letter-spacing: 0.08em;
}

.book-card > .link > .text {
  display: grid;
  gap: 0.35rem;
}

.book-card > .link > .text > .title {
  margin: 0;
  font-size: 1.18rem;
  line-height: 1.15;
}

.book-card > .link > .text > .author,
.book-card > .link > .text > .meta {
  margin: 0;
}

.book-card > .link > .text > .author {
  min-height: 3rem;
  color: var(--muted);
}

.book-card > .link > .text > .meta {
  color: var(--accent);
  font-size: 0.82rem;
  word-break: break-word;
}

.detail-page {
  display: grid;
  gap: 1.5rem;
}

.author-hero {
  max-width: 48rem;
}

.back-link {
  color: var(--accent);
  font-weight: 700;
  text-decoration: none;
}

.detail-card {
  display: grid;
  grid-template-columns: minmax(14rem, 18rem) minmax(0, 1fr);
  gap: 2rem;
}

.detail-card > .media > .cover {
  width: 100%;
  aspect-ratio: 3 / 4.2;
  border: 1px solid var(--border);
  border-radius: 1.25rem;
  object-fit: cover;
  background: linear-gradient(180deg, var(--surface-soft) 0%, var(--surface-strong) 100%);
  box-shadow: 0 18px 34px rgba(0, 0, 0, 0.28);
}

.detail-card > .media > .cover.-fallback {
  display: grid;
  place-items: center;
  background:
    radial-gradient(circle at top, rgba(138, 180, 255, 0.26), transparent 38%),
    linear-gradient(160deg, var(--cover-start) 0%, var(--cover-end) 100%);
}

.detail-card > .media > .cover.-fallback > .initial {
  color: #f5f8ff;
  font-size: clamp(3rem, 9vw, 5rem);
  font-weight: 800;
  letter-spacing: 0.08em;
}

.detail-card > .content {
  min-width: 0;
}

.meta-list {
  display: grid;
  gap: 1rem;
  margin: 1.5rem 0 0;
}

.meta-list > .row {
  display: grid;
  gap: 0.28rem;
}

.meta-list > .row > .term {
  margin: 0;
  color: var(--accent);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.meta-list > .row > .description {
  margin: 0;
  color: var(--soft);
  word-break: break-word;
}

.meta-list.-compact {
  gap: 0.75rem;
  margin-top: 1rem;
}

.sync-panel {
  display: grid;
  gap: 0.85rem;
  margin-top: 1.75rem;
  padding: 1rem;
  border: 1px solid var(--border);
  border-radius: 1rem;
  background: rgba(7, 12, 19, 0.34);
}

.sync-panel > .heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.sync-panel > .heading > .title {
  margin: 0;
  font-size: 1rem;
}

.sync-panel > .heading > .badge {
  padding: 0.28rem 0.62rem;
  border: 1px solid var(--border);
  border-radius: 999px;
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.sync-panel > .heading > .badge.-synced {
  border-color: rgba(138, 180, 255, 0.38);
  background: rgba(138, 180, 255, 0.1);
  color: var(--accent);
}

.sync-panel > .body {
  margin: 0;
  color: var(--muted);
}

.actions-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.75rem;
}

@media (max-width: 720px) {
  .app-shell {
    padding: 1rem;
  }

  .site-header,
  .catalog-bar {
    align-items: flex-start;
    flex-direction: column;
  }

  .surface-panel {
    padding: 1.25rem;
  }

  .author-list > .author-link {
    align-items: flex-start;
    flex-direction: column;
  }

  .user-row {
    align-items: flex-start;
    flex-direction: column;
  }

  .invite-row {
    flex-direction: column;
  }

  .detail-card {
    grid-template-columns: 1fr;
  }
}