:root {
  color-scheme: light dark;
  --color: #1f6feb;
  --accent: #ffb454;
  --color-soft: rgba(31, 111, 235, 0.1);
  --fs: 1rem;
  --font: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --bg: #f8f9fb;
  --bg-strong: #ffffff;
  --text: #1b1f24;
  --text-muted: #5b6573;
  --border: rgba(15, 23, 42, 0.15);
  --shadow: 0 12px 32px rgba(15, 23, 42, 0.12);
}

@media (prefers-color-scheme: dark) {
  :root[data-mode="auto"] {
    --bg: #0f172a;
    --bg-strong: #111827;
    --text: #e2e8f0;
    --text-muted: #94a3b8;
    --border: rgba(148, 163, 184, 0.25);
    --shadow: 0 12px 30px rgba(0, 0, 0, 0.35);
  }
}

:root[data-mode="dark"] {
  --bg: #0f172a;
  --bg-strong: #111827;
  --text: #e2e8f0;
  --text-muted: #94a3b8;
  --border: rgba(148, 163, 184, 0.25);
  --shadow: 0 12px 30px rgba(0, 0, 0, 0.35);
}

:root[data-mode="light"] {
  --bg: #f8f9fb;
  --bg-strong: #ffffff;
  --text: #1b1f24;
  --text-muted: #5b6573;
  --border: rgba(15, 23, 42, 0.15);
  --shadow: 0 12px 32px rgba(15, 23, 42, 0.12);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: var(--font);
  font-size: var(--fs);
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

body.preview-mode .editor,
body.preview-mode .block-controls,
body.preview-mode .block-editor,
body.preview-mode .add-between {
  display: none !important;
}

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

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

.topbar {
  position: sticky;
  top: 0;
  z-index: 5;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 1.5rem;
  background: var(--bg-strong);
  border-bottom: 1px solid var(--border);
  gap: 1rem;
}

.site-meta h1 {
  margin: 0;
  font-size: calc(var(--fs) * 1.6);
}

.site-meta p {
  margin: 0.25rem 0 0;
}

.muted {
  color: var(--text-muted);
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  align-items: center;
}

.action {
  border: 1px solid transparent;
  background: var(--color);
  color: #fff;
  padding: 0.45rem 0.9rem;
  border-radius: 999px;
  font-size: 0.95rem;
  cursor: pointer;
  transition: transform 0.15s ease, box-shadow 0.15s ease, background 0.3s ease;
}

.action:hover,
.action:focus {
  outline: none;
  transform: translateY(-1px);
  box-shadow: 0 10px 20px rgba(0, 0, 0, 0.12);
}

.action[hidden] {
  display: none;
}

.action-file {
  position: relative;
  overflow: hidden;
}

.action-file input[type="file"] {
  position: absolute;
  inset: 0;
  opacity: 0;
  cursor: pointer;
}

.layout {
  flex: 1;
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
  padding: 1.5rem;
}

.layout.view-mode {
  grid-template-columns: 1fr;
}

.layout.view-mode .canvas {
  display: block;
}

.layout.view-mode .content {
  max-width: 100%;
}

.editor {
  background: var(--bg-strong);
  border: 1px solid var(--border);
  border-radius: 1rem;
  padding: 1.25rem;
  max-height: calc(100vh - 6rem);
  overflow-y: auto;
  box-shadow: var(--shadow);
}

.editor h2 {
  margin-top: 0;
  font-size: 1.1rem;
}

.editor label {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  margin-bottom: 0.85rem;
  font-size: 0.9rem;
}

.editor input,
.editor select,
.editor textarea {
  border-radius: 0.75rem;
  border: 1px solid var(--border);
  padding: 0.55rem 0.75rem;
  background: rgba(148, 163, 184, 0.07);
  color: inherit;
}

.palette {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: 0.5rem;
  padding: 0;
  margin: 0;
}

.palette li button {
  width: 100%;
  border-radius: 999px;
  border: 1px dashed var(--border);
  background: transparent;
  color: inherit;
  padding: 0.5rem 0.75rem;
  cursor: grab;
}

.palette li button:active {
  cursor: grabbing;
}

.canvas {
  display: flex;
  justify-content: center;
}

.content {
  width: 100%;
  max-width: 960px;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.content.layout-narrow {
  max-width: 720px;
}

.block {
  background: var(--bg-strong);
  border: 1px solid var(--border);
  border-radius: 1rem;
  padding: 1.25rem;
  box-shadow: var(--shadow);
  position: relative;
}

.block + .add-between {
  margin-top: -1rem;
}

.block-controls {
  display: flex;
  justify-content: flex-end;
  gap: 0.5rem;
  margin-bottom: 0.75rem;
  flex-wrap: wrap;
}

.block-controls button {
  border-radius: 0.75rem;
  border: 1px solid var(--border);
  background: rgba(148, 163, 184, 0.12);
  color: inherit;
  padding: 0.35rem 0.65rem;
  font-size: 0.85rem;
  cursor: pointer;
}

.drag-handle {
  cursor: grab;
}

.block-editor {
  display: grid;
  gap: 0.75rem;
  margin-top: 0.75rem;
}

.block-editor label {
  font-size: 0.85rem;
}

.block-editor textarea,
.block-editor input {
  width: 100%;
}

.text-editor-wrapper {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.text-toolbar {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.text-toolbar button {
  border-radius: 0.6rem;
  border: 1px solid rgba(148, 163, 184, 0.3);
  background: rgba(31, 111, 235, 0.12);
  color: inherit;
  padding: 0.35rem 0.7rem;
  font-size: 0.8rem;
  cursor: pointer;
}

.text-toolbar button:hover,
.text-toolbar button:focus {
  background: rgba(31, 111, 235, 0.2);
}

.text-style-controls {
  display: grid;
  gap: 0.75rem;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
}

.text-style-controls label {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.text-style-inline {
  display: flex;
  gap: 0.5rem;
  align-items: center;
}

.text-style-inline button {
  flex-shrink: 0;
  border: 1px solid rgba(148, 163, 184, 0.3);
  border-radius: 0.6rem;
  background: transparent;
  padding: 0.25rem 0.6rem;
  font-size: 0.75rem;
  cursor: pointer;
}

.text-style-inline button:hover,
.text-style-inline button:focus {
  background: rgba(148, 163, 184, 0.16);
}

.text-rich p,
.text-rich li {
  line-height: inherit;
}

.media-source-toggle {
  border: 1px solid var(--border);
  border-radius: 0.75rem;
  padding: 0.75rem;
  display: grid;
  gap: 0.5rem;
}

.media-source-toggle legend {
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.media-source-option {
  display: flex;
  gap: 0.5rem;
  align-items: center;
  font-size: 0.85rem;
}

.media-source-field {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.media-source-field[hidden] {
  display: none;
}

.media-source-note {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.block-preview p {
  margin: 0.5rem 0;
  line-height: 1.6;
}

.block-callout {
  border-left: 4px solid var(--color);
  background: var(--color-soft);
  padding: 1rem;
  border-radius: 0.75rem;
}

.block-quote blockquote {
  margin: 0;
  padding-left: 1rem;
  border-left: 4px solid var(--accent);
  font-size: 1.1em;
  font-style: italic;
}

.block-gallery {
  display: grid;
  gap: 0.75rem;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
}

.block-gallery figure,
.block-image figure {
  margin: 0;
}

.block-gallery img,
.block-image img {
  width: 100%;
  border-radius: 0.75rem;
  display: block;
}

.block-links ul {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 0.5rem;
}

.block-links a {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.4rem 0.6rem;
  border-radius: 0.5rem;
  background: rgba(31, 111, 235, 0.1);
}

.site-footer {
  margin-top: auto;
  padding: 2rem 1.5rem 3rem;
  text-align: center;
  color: var(--text-muted);
}

.toast {
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  background: var(--bg-strong);
  border: 1px solid var(--border);
  border-radius: 0.75rem;
  padding: 0.75rem 1rem;
  box-shadow: var(--shadow);
  min-width: 240px;
}

.audio-fallback,
.media-fallback {
  background: rgba(148, 163, 184, 0.16);
  border-radius: 0.75rem;
  padding: 0.75rem;
  color: var(--text-muted);
  text-align: center;
  margin-top: 0.75rem;
}

.add-between {
  display: flex;
  justify-content: center;
}

.add-between button {
  border-radius: 999px;
  border: 1px dashed var(--border);
  background: transparent;
  color: inherit;
  padding: 0.4rem 0.9rem;
  cursor: pointer;
}

.inline-picker {
  margin-top: 0.5rem;
  display: grid;
  gap: 0.4rem;
  background: var(--bg-strong);
  border: 1px solid var(--border);
  border-radius: 0.75rem;
  padding: 0.5rem;
  box-shadow: var(--shadow);
}

.inline-picker button {
  border: 1px solid rgba(148, 163, 184, 0.2);
  border-radius: 0.6rem;
  background: rgba(31, 111, 235, 0.08);
  color: inherit;
  padding: 0.35rem 0.6rem;
  font-size: 0.85rem;
  text-align: left;
  cursor: pointer;
}

.youtube-wrapper {
  position: relative;
  width: 100%;
  padding-bottom: 56.25%;
  border-radius: 0.75rem;
  overflow: hidden;
  background: #000;
}

.youtube-wrapper iframe {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border: 0;
}

audio {
  width: 100%;
  margin-top: 0.5rem;
}

object[type="application/pdf"] {
  width: 100%;
  height: 480px;
  border-radius: 0.75rem;
  border: 1px solid var(--border);
  margin-top: 0.75rem;
}

blockquote cite {
  display: block;
  margin-top: 0.5rem;
  font-size: 0.9em;
  color: var(--text-muted);
}

@media (min-width: 1024px) {
  .layout {
    grid-template-columns: 320px 1fr;
  }

  .layout.view-mode {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .topbar {
    flex-direction: column;
    align-items: flex-start;
  }

  .layout {
    grid-template-columns: 1fr;
    padding: 1rem;
  }

  .editor {
    position: sticky;
    top: 4.5rem;
  }
}