:root {
  color-scheme: light;
  --bg: #f2efe9;
  --bg-top: #fdfbf7;
  --bg-deep: #e7e2d8;
  --font-ui: "IBM Plex Sans", "Segoe UI", sans-serif;
  --font-body: "IBM Plex Serif", "Georgia", serif;
  --font-mono: "IBM Plex Mono", "SFMono-Regular", "Menlo", "Consolas", monospace;
  --ink: #1e1b16;
  --muted: #6f6559;
  --accent: #b86f3c;
  --panel: #ffffff;
  --panel-soft: #fdfcf8;
  --panel-strong: #fffdf9;
  --shadow: 0 24px 60px rgba(30, 27, 22, 0.12);
  --border: rgba(30, 27, 22, 0.08);
  --radius: 20px;
  --code-bg: #1c1a16;
  --code-ink: #f5f0e8;
  --code-inline-bg: rgba(30, 27, 22, 0.08);
  --hint-bg: rgba(30, 27, 22, 0.8);
  --hint-ink: #f7f2ea;
  --danger: #a4372a;
}

body[data-theme="dark"] {
  color-scheme: dark;
  --bg: #151311;
  --bg-top: #1c1916;
  --bg-deep: #141210;
  --ink: #f3ede4;
  --muted: #b6aa9b;
  --accent: #c07a45;
  --panel: #1f1c18;
  --panel-soft: #231f1b;
  --panel-strong: #26221d;
  --shadow: 0 30px 60px rgba(0, 0, 0, 0.45);
  --border: rgba(255, 255, 255, 0.1);
  --code-bg: #0f0d0b;
  --code-ink: #f4efe6;
  --code-inline-bg: rgba(255, 255, 255, 0.08);
  --hint-bg: rgba(15, 13, 11, 0.85);
  --hint-ink: #f4efe6;
  --danger: #e07163;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  min-height: 100%;
  background-color: var(--bg);
  overflow: hidden;
}

body {
  font-family: var(--font-ui);
  color: var(--ink);
  background: radial-gradient(circle at top, var(--bg-top) 0%, var(--bg) 60%);
}

.ambient {
  position: fixed;
  inset: 0;
  background: radial-gradient(circle at 20% 10%, rgba(184, 111, 60, 0.08), transparent 45%),
    radial-gradient(circle at 85% 15%, rgba(137, 81, 148, 0.05), transparent 50%),
    radial-gradient(circle at 30% 90%, rgba(68, 123, 113, 0.06), transparent 40%);
  pointer-events: none;
  z-index: 0;
}

body[data-theme="dark"] .ambient {
  background: radial-gradient(circle at 20% 10%, rgba(184, 111, 60, 0.12), transparent 45%),
    radial-gradient(circle at 85% 15%, rgba(96, 76, 128, 0.14), transparent 50%),
    radial-gradient(circle at 30% 90%, rgba(66, 122, 111, 0.12), transparent 40%);
}

.app {
  position: relative;
  z-index: 1;
  max-width: 1200px;
  margin: 40px auto;
  padding: 28px 28px 20px;
  background: var(--panel);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  display: grid;
  grid-template-rows: auto 1fr auto;
  height: calc(100vh - 80px);
  min-height: 0;
  overflow: hidden;
  animation: rise 0.6s ease;
}

@keyframes rise {
  from {
    opacity: 0;
    transform: translateY(16px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border);
}

.title-wrap {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.doc-title {
  font-family: var(--font-body);
  font-size: 1.4rem;
  font-weight: 600;
  border: none;
  outline: none;
  color: var(--ink);
}

.title-meta {
  font-size: 0.85rem;
  color: var(--muted);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

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

button {
  border: 1px solid var(--border);
  background: var(--panel-strong);
  padding: 8px 14px;
  border-radius: 999px;
  font-size: 0.9rem;
  cursor: pointer;
  color: var(--ink);
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

button:hover {
  transform: translateY(-1px);
  box-shadow: 0 8px 18px rgba(30, 27, 22, 0.12);
  border-color: rgba(30, 27, 22, 0.22);
}

button:active {
  transform: translateY(0);
}

.workspace {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  padding: 22px 0;
  min-height: 0;
}

.pane {
  background: var(--panel-soft);
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 20px;
  overflow: hidden;
  display: flex;
  min-height: 0;
}

.editor-pane .CodeMirror {
  width: 100%;
  height: 100%;
  font-family: var(--font-body);
  font-size: 1.05rem;
  line-height: 1.6;
  color: var(--ink);
  background: transparent;
}

.editor-pane .CodeMirror-scroll {
  padding-right: 8px;
  padding-bottom: 24px;
}

.editor-pane .CodeMirror-gutters {
  background: transparent;
  border: none;
}

.preview {
  font-family: var(--font-body);
  font-size: 1.02rem;
  line-height: 1.7;
  color: var(--ink);
  width: 100%;
  height: 100%;
  overflow-y: auto;
  padding-right: 8px;
  padding-bottom: 24px;
}

.preview h1,
.preview h2,
.preview h3 {
  font-family: var(--font-body);
  margin-top: 1.6em;
}

.preview blockquote {
  margin: 1.2em 0;
  padding: 0.6em 1em;
  border-left: 3px solid var(--accent);
  background: rgba(184, 111, 60, 0.08);
}

.preview code {
  font-family: var(--font-mono);
  background: var(--code-inline-bg);
  padding: 0.15em 0.35em;
  border-radius: 6px;
}

.preview pre {
  background: var(--code-bg);
  color: var(--code-ink);
  padding: 16px;
  border-radius: 12px;
  overflow-x: auto;
}

.preview pre code {
  background: transparent;
  color: inherit;
  padding: 0;
}

.statusbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.85rem;
  color: var(--muted);
  border-top: 1px solid var(--border);
  padding-top: 12px;
  gap: 12px;
}

.status-actions {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.status-actions .small {
  padding: 6px 12px;
  font-size: 0.8rem;
}

.focus-hint {
  position: fixed;
  right: 24px;
  bottom: 24px;
  background: var(--hint-bg);
  color: var(--hint-ink);
  padding: 10px 16px;
  border-radius: 999px;
  font-size: 0.85rem;
  letter-spacing: 0.02em;
  opacity: 0;
  transform: translateY(8px);
  transition: opacity 0.2s ease, transform 0.2s ease;
  pointer-events: none;
}

.split-off .preview-pane {
  display: none;
}

.split-off .workspace {
  grid-template-columns: 1fr;
}

.focus .topbar,
.focus .statusbar,
.focus .preview-pane {
  display: none;
}

.focus .focus-hint {
  opacity: 1;
  transform: translateY(0);
}

.modal {
  position: fixed;
  inset: 0;
  background: rgba(30, 27, 22, 0.45);
  display: none;
  align-items: center;
  justify-content: center;
  padding: 20px;
  z-index: 4;
}

.modal.show {
  display: flex;
}

.modal-card {
  width: min(520px, 100%);
  background: var(--panel-strong);
  border-radius: 18px;
  padding: 20px;
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
}

.modal-header h2 {
  margin: 0;
  font-size: 1.2rem;
}

.modal-body {
  display: grid;
  gap: 12px;
}

.shortcut-list {
  display: grid;
  gap: 8px;
}

.shortcut-row {
  display: grid;
  grid-template-columns: 180px 1fr;
  gap: 12px;
  align-items: center;
}

.shortcut-key {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  padding: 6px 10px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--panel);
  color: var(--ink);
}

.shortcut-action {
  font-size: 0.9rem;
  color: var(--muted);
}

.field {
  display: grid;
  gap: 6px;
  font-size: 0.9rem;
  color: var(--muted);
}

.field select,
.share-result input {
  padding: 10px 12px;
  border-radius: 10px;
  border: 1px solid var(--border);
  font-size: 0.95rem;
  color: var(--ink);
  background: var(--panel);
}

.share-actions,
.share-result {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.share-result input {
  flex: 1 1 60%;
}

.share-hint {
  margin: 0;
  font-size: 0.85rem;
  color: var(--muted);
}

.modal-hint {
  margin: 0;
  font-size: 0.85rem;
  color: var(--muted);
}

.share-error {
  margin: 0;
  font-size: 0.85rem;
  color: var(--danger);
  min-height: 1.1em;
}

.focus .workspace {
  grid-template-columns: 1fr;
  padding: 0;
}

.focus .pane {
  border: none;
  border-radius: 0;
  padding: 8px 4px;
}

@media (max-width: 900px) {
  .app {
    margin: 20px;
    height: calc(100vh - 40px);
  }

  .workspace {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 600px) {
  .topbar {
    flex-direction: column;
    align-items: flex-start;
  }

  .actions {
    width: 100%;
  }

  button {
    flex: 1 1 auto;
    text-align: center;
  }
}