.doc-reader[hidden] {
  display: none !important;
}

.doc-reader {
  position: fixed;
  inset: 0;
  z-index: 90;
  display: grid;
  place-items: center;
  padding: 18px;
}

.doc-reader-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(8,12,20,.46);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
}

.doc-reader-panel {
  position: relative;
  width: min(880px, 100%);
  height: min(90vh, 920px);
  display: grid;
  grid-template-rows: auto minmax(0,1fr);
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 28px;
  background: var(--bg);
  box-shadow: 0 30px 80px rgba(16,24,40,.26);
}

.doc-reader-header {
  min-height: 72px;
  padding: 12px 16px;
  display: grid;
  grid-template-columns: auto minmax(0,1fr) auto;
  align-items: center;
  gap: 12px;
  border-bottom: 1px solid var(--line);
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  -webkit-backdrop-filter: blur(20px);
  backdrop-filter: blur(20px);
}

.doc-reader-back,
.doc-reader-external {
  min-width: 42px;
  min-height: 42px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 7px;
  padding: 0 11px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--surface);
  color: var(--text);
  font: inherit;
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
}

.doc-reader-back span {
  font-size: .88rem;
  font-weight: 700;
}

.doc-reader-back i,
.doc-reader-external i {
  font-size: 19px;
  line-height: 1;
}

.doc-reader-heading {
  min-width: 0;
  text-align: center;
}

.doc-reader-heading small,
.doc-reader-heading strong {
  display: block;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.doc-reader-heading small {
  margin-bottom: 2px;
  color: var(--blue-2);
  font-size: .66rem;
  font-weight: 800;
  letter-spacing: .08em;
  text-transform: uppercase;
}

.doc-reader-heading strong {
  color: var(--text);
  font-size: 1rem;
  letter-spacing: -.02em;
}

.doc-reader-body {
  min-height: 0;
  overflow-y: auto;
  overscroll-behavior: contain;
  -webkit-overflow-scrolling: touch;
}

.doc-reader-loading,
.doc-reader-error {
  min-height: 50vh;
  display: grid;
  place-items: center;
  align-content: center;
  gap: 12px;
  padding: 32px 22px;
  color: var(--muted);
  text-align: center;
}

.doc-reader-loading[hidden],
.doc-reader-error[hidden],
.doc-reader-article[hidden] {
  display: none !important;
}

.doc-reader-spinner {
  width: 30px;
  height: 30px;
  border: 3px solid rgba(79,132,238,.16);
  border-top-color: var(--blue-2);
  border-radius: 50%;
  animation: doc-reader-spin .8s linear infinite;
}

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

.doc-reader-error i {
  color: var(--blue-2);
  font-size: 30px;
}

.doc-reader-error strong {
  color: var(--text);
  font-size: 1.05rem;
}

.doc-reader-error p {
  max-width: 470px;
  margin: 0;
  line-height: 1.55;
}

.doc-reader-error a {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  min-height: 42px;
  padding: 0 14px;
  border-radius: 14px;
  background: linear-gradient(135deg,var(--blue-2),var(--violet));
  color: #fff;
  font-weight: 750;
}

.doc-reader-article {
  width: min(720px, calc(100% - 36px));
  margin: 0 auto;
  padding: 34px 0 54px;
  color: var(--text);
  font-size: 1rem;
  line-height: 1.72;
}

.doc-reader-article > .doc-reader-title {
  margin: 0 0 10px;
  font-size: clamp(2rem,5vw,3rem);
  line-height: 1.06;
  letter-spacing: -.05em;
}

.doc-reader-meta {
  margin: 0 0 28px;
  color: var(--muted);
  font-size: .84rem;
}

.doc-reader-article h3,
.doc-reader-article h4 {
  margin: 30px 0 10px;
  color: var(--text);
  line-height: 1.2;
  letter-spacing: -.025em;
}

.doc-reader-article h3 { font-size: 1.35rem; }
.doc-reader-article h4 { font-size: 1.12rem; }

.doc-reader-article p {
  margin: 0 0 16px;
}

.doc-reader-article ul,
.doc-reader-article ol {
  margin: 0 0 18px;
  padding-left: 1.35rem;
}

.doc-reader-article li {
  margin: 7px 0;
}

.doc-reader-article a {
  color: var(--blue-2);
  text-decoration: underline;
  text-decoration-thickness: .08em;
  text-underline-offset: .15em;
}

.doc-reader-article blockquote {
  margin: 22px 0;
  padding: 14px 16px;
  border-left: 3px solid var(--blue-2);
  border-radius: 0 14px 14px 0;
  background: var(--surface-soft);
  color: var(--muted);
}

.doc-reader-article pre,
.doc-reader-article code {
  font-family: ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
}

.doc-reader-article pre {
  overflow-x: auto;
  padding: 14px;
  border-radius: 14px;
  background: var(--surface-soft);
}

.doc-reader-article code {
  padding: .12em .35em;
  border-radius: 6px;
  background: var(--surface-soft);
}

.doc-reader-article figure {
  margin: 24px 0;
}

.doc-reader-article img {
  width: auto;
  max-width: 100%;
  height: auto;
  margin: 0 auto;
  border-radius: 18px;
}

.doc-reader-article figcaption {
  margin-top: 8px;
  color: var(--muted);
  font-size: .82rem;
  text-align: center;
}

.doc-reader-article hr {
  height: 1px;
  margin: 30px 0;
  border: 0;
  background: var(--line);
}

body.doc-reader-open {
  overflow: hidden;
}

@media (max-width:680px) {
  .doc-reader {
    padding: 0;
  }

  .doc-reader-panel {
    width: 100%;
    height: 100dvh;
    max-height: none;
    border: 0;
    border-radius: 0;
  }

  .doc-reader-header {
    min-height: 68px;
    padding: max(10px, env(safe-area-inset-top)) 12px 10px;
  }

  .doc-reader-back {
    width: 42px;
    padding: 0;
  }

  .doc-reader-back span {
    display: none;
  }

  .doc-reader-article {
    width: min(100% - 28px, 720px);
    padding-top: 28px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .doc-reader-spinner {
    animation: none;
  }
}