:root {
  --bg: #ffffff;
  --bg-soft: #f7f7f7;
  --panel: #ffffff;
  --panel-border: #ece7e2;
  --text: #1f1c18;
  --muted: #756b61;
  --accent: #ef7d22;
  --accent-strong: #ff9b4a;
  --paper: #ffffff;
  --shadow: 0 18px 45px rgba(33, 23, 10, 0.08);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
  font-family: "Manrope", sans-serif;
  color: var(--text);
  background: var(--bg);
}

a {
  color: inherit;
  text-decoration: none;
}

code,
pre {
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
}

.site-shell,
.viewer-shell {
  min-height: 100vh;
  padding: 24px;
}

.topbar,
.viewer-topbar {
  display: flex;
  gap: 20px;
  align-items: flex-start;
  justify-content: space-between;
  margin-bottom: 20px;
}

.brand {
  display: inline-flex;
  flex-direction: column;
  gap: 2px;
}

.brand strong {
  font-size: 1.1rem;
}

.brand__eyebrow,
.panel__eyebrow,
.panel__label,
.meta-grid__title,
.empty-state__tag,
.hero-card__tag {
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.18em;
  font-size: 0.72rem;
  font-weight: 800;
}

.nav-actions,
.hero-card__actions,
.form-actions,
.viewer-topbar__actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.button,
.text-button {
  font: inherit;
  cursor: pointer;
  transition: transform 180ms ease, opacity 180ms ease, background 180ms ease;
}

.button {
  border: 1px solid var(--accent);
  border-radius: 999px;
  padding: 12px 18px;
  background: #fffaf5;
  color: var(--accent);
  font-weight: 800;
}

.button:hover,
.text-button:hover,
.file-trigger:hover {
  transform: translateY(-1px);
}

.button--ghost {
  background: #ffffff;
  color: var(--accent);
}

.text-button {
  background: transparent;
  border: 0;
  color: var(--accent);
  padding: 0;
  font-weight: 700;
}

.home-layout,
.admin-layout {
  display: grid;
  gap: 18px;
}

.home-layout {
  grid-template-columns: minmax(320px, 1.1fr) minmax(0, 1fr);
}

.hero-card,
.panel,
.viewer-frame {
  backdrop-filter: blur(22px);
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-radius: 28px;
  box-shadow: var(--shadow);
}

.hero-card,
.panel {
  padding: 24px;
}

.hero-card h1,
.panel h1,
.panel h2,
.viewer-topbar h1 {
  margin: 10px 0 10px;
  line-height: 1.02;
}

.hero-card h1 {
  font-size: clamp(2rem, 3vw + 1rem, 4.2rem);
  max-width: 13ch;
}

.hero-card p,
.callout p,
.panel__status,
.catalog-card p,
.empty-state__card p {
  color: var(--muted);
  line-height: 1.6;
}

.hero-metrics {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin-top: 22px;
}

.hero-metrics article,
.callout,
.catalog-card,
.embed-box,
.code-box {
  background: #fcfbfa;
  border: 1px solid #eee7df;
  border-radius: 20px;
  padding: 16px;
}

.hero-metrics span,
.catalog-card__meta {
  display: block;
  color: var(--muted);
  font-size: 0.85rem;
}

.hero-metrics strong {
  display: block;
  margin-top: 8px;
  font-size: 0.98rem;
}

.panel__head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 14px;
}

.catalog-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(230px, 1fr));
  gap: 14px;
}

.catalog-card {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.catalog-card__cover {
  aspect-ratio: 4 / 5;
  border-radius: 16px;
  background:
    linear-gradient(145deg, rgba(101, 217, 255, 0.22), rgba(47, 184, 255, 0.05)),
    rgba(255, 255, 255, 0.03);
  display: grid;
  place-items: center;
  overflow: hidden;
}

.catalog-card__cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.catalog-card__cover span {
  padding: 20px;
  text-align: center;
  font-weight: 800;
}

.catalog-card__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.catalog-card__chip {
  display: inline-flex;
  align-items: center;
  border-radius: 999px;
  padding: 8px 12px;
  background: rgba(255, 255, 255, 0.06);
  font-size: 0.82rem;
  color: var(--muted);
}

.input {
  width: 100%;
  border: 1px solid #e8dfd5;
  background: #ffffff;
  color: var(--text);
  border-radius: 14px;
  outline: none;
  font: inherit;
  padding: 14px 16px;
}

.input--textarea {
  min-height: 110px;
  resize: vertical;
}

.admin-form,
.stack-form,
.callout-list {
  display: grid;
  gap: 12px;
}

.embed-box,
.code-box {
  overflow: auto;
}

.code-box {
  white-space: pre-wrap;
  word-break: break-word;
}

.viewer-body {
  overflow: hidden;
  background: #ffffff;
}

.viewer-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
  min-height: 100vh;
}

.sidebar {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.panel--compact {
  padding: 16px 18px;
}

.meta-grid {
  display: grid;
  gap: 14px;
}

.meta-grid__title {
  color: var(--muted);
}

.meta-grid strong {
  display: block;
  margin-top: 5px;
  font-size: 0.96rem;
  word-break: break-word;
}

.file-trigger input {
  display: none;
}

.viewer-area {
  min-width: 0;
}

.viewer-frame {
  position: relative;
  display: flex;
  flex-direction: column;
  min-height: 100%;
  overflow: hidden;
  background: #ffffff;
  border: 0;
  border-radius: 0;
  box-shadow: none;
}

.viewer-frame__glow {
  position: absolute;
  inset: -10%;
  background: none;
  pointer-events: none;
}

.viewer-controls {
  position: relative;
  z-index: 2;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
  padding: 18px;
  border-bottom: 1px solid #f0e6dc;
  background: #ffffff;
}

.viewer-arrow {
  position: absolute;
  top: 50%;
  z-index: 5;
  transform: translateY(-50%);
  width: 52px;
  height: 52px;
  border-radius: 999px;
  border: 1px solid #ef7d22;
  background: rgba(255, 255, 255, 0.96);
  color: #ef7d22;
  font-size: 2rem;
  line-height: 1;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  box-shadow: 0 10px 24px rgba(239, 125, 34, 0.12);
}

.viewer-arrow--left {
  left: 18px;
}

.viewer-arrow--right {
  right: 18px;
}

.page-indicator {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 4px 6px;
  background: #fffaf5;
  border: 1px solid #f2dfcc;
  border-radius: 999px;
}

.page-indicator input {
  width: 72px;
  padding: 8px 10px;
  text-align: center;
  border: 1px solid #f0dcc7;
  background: #ffffff;
  color: var(--text);
  border-radius: 14px;
  outline: none;
  font: inherit;
}

.zoom-range {
  width: 140px;
}

.flipbook-shell,
.empty-state,
.loading-state {
  position: relative;
  z-index: 1;
  flex: 1;
}

.flipbook-shell {
  display: grid;
  place-items: center;
  padding: 24px 72px;
  overflow: auto;
}

.flipbook {
  transform-origin: center center;
  transition: transform 220ms ease;
}

.page {
  background: var(--paper);
  overflow: hidden;
  display: flex;
  align-items: stretch;
  justify-content: stretch;
  border-radius: 2px;
}

.page canvas {
  width: 100%;
  height: 100%;
  display: block;
}

.thumbnails {
  display: grid;
  gap: 12px;
  max-height: calc(100vh - 390px);
  overflow: auto;
  padding-right: 4px;
}

.thumbnail {
  border: 1px solid #eee5da;
  border-radius: 18px;
  background: #ffffff;
  padding: 10px;
  cursor: pointer;
  transition: transform 180ms ease, border-color 180ms ease, background 180ms ease;
}

.thumbnail:hover,
.thumbnail.is-active {
  transform: translateY(-2px);
  border-color: #ef7d22;
  background: #fff8f1;
}

.thumbnail canvas {
  width: 100%;
  display: block;
  border-radius: 10px;
  background: white;
}

.thumbnail span {
  display: block;
  margin-top: 8px;
  color: var(--muted);
  font-size: 0.84rem;
}

.empty-state,
.loading-state {
  display: grid;
  place-items: center;
  padding: 30px;
}

.empty-state__card {
  max-width: 560px;
  text-align: center;
  padding: 36px;
  border-radius: 28px;
  background: #fffdfb;
  border: 1px solid #f0e7dc;
}

.empty-state__card h2 {
  margin: 10px 0 8px;
  font-size: clamp(1.8rem, 2vw + 1rem, 3rem);
  line-height: 1.02;
}

.spinner {
  width: 52px;
  height: 52px;
  border-radius: 50%;
  border: 4px solid #f4eadf;
  border-top-color: var(--accent);
  animation: spin 800ms linear infinite;
}

.hidden {
  display: none !important;
}

.embed-mode #viewerHeader,
.embed-mode #viewerSidebar {
  display: none;
}

.embed-mode .viewer-shell {
  padding: 0;
}

.embed-mode .viewer-layout {
  grid-template-columns: 1fr;
  min-height: 100vh;
}

.embed-mode .viewer-frame {
  border-radius: 0;
  border: 0;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

@media (max-width: 1120px) {
  .home-layout,
  .viewer-layout {
    grid-template-columns: 1fr;
  }

  .viewer-body {
    overflow: auto;
  }

  .thumbnails {
    max-height: 320px;
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  }
}

@media (max-width: 760px) {
  .site-shell,
  .viewer-shell {
    padding: 14px;
  }

  .topbar,
  .viewer-topbar {
    flex-direction: column;
  }

  .hero-metrics {
    grid-template-columns: 1fr;
  }

  .viewer-controls {
    justify-content: center;
  }

  .viewer-arrow {
    width: 44px;
    height: 44px;
    font-size: 1.7rem;
  }

  .viewer-arrow--left {
    left: 8px;
  }

  .viewer-arrow--right {
    right: 8px;
  }

  .flipbook-shell {
    padding: 10px 18px;
  }
}