:root {
  --background: #0a0a0f;
  --sidebar: #111120;
  --content: #13131f;
  --border: #1e1e2e;
  --accent: #00f5ff;
  --secondary: #bf5fff;
  --danger: #ff4d6d;
  --text: #ffffff;
  --muted: rgba(255, 255, 255, 0.65);
}

html.light {
  --background: #f8f9fa;
  --sidebar: #e9ecef;
  --content: #ffffff;
  --border: #d5d9df;
  --accent: #0066cc;
  --secondary: #6f42c1;
  --danger: #c82345;
  --text: #15171a;
  --muted: rgba(0, 0, 0, 0.62);
}

* {
  box-sizing: border-box;
}

html,
body {
  min-height: 100%;
  margin: 0;
}

body {
  background: var(--background);
  color: var(--text);
  font-family: "Plus Jakarta Sans", sans-serif;
}

button,
input,
textarea {
  font: inherit;
}

button:focus-visible,
input:focus-visible,
textarea:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 3px;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.app-layout {
  display: grid;
  grid-template-columns: 310px minmax(0, 1fr);
  min-height: 100vh;
}

.sidebar-panel {
  border-right: 1px solid var(--border);
  background: var(--sidebar);
  padding: 20px;
}

.content-panel {
  min-width: 0;
  background: var(--content);
  padding: 40px;
}

.app-title {
  margin: 0 0 16px;
  color: var(--accent);
  font-size: 1.35rem;
  font-weight: 800;
}

.primary-btn,
.action-btn,
.toolbar-btn,
.home-link,
.theme-toggle,
.sidebar-note-link {
  border: 1px solid var(--border);
  border-radius: 12px;
  cursor: pointer;
  transition: 0.18s ease;
}

.primary-btn {
  background: var(--accent);
  color: #001014;
  font-weight: 800;
  padding: 11px 14px;
}

.sidebar-header .primary-btn,
.sidebar-search,
.home-link,
.theme-toggle,
.sidebar-note-link {
  width: 100%;
}

.sidebar-search {
  margin: 18px 0;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--background);
  color: var(--text);
  padding: 11px 12px;
}

.sidebar-notes {
  display: grid;
  gap: 10px;
}

.note-placeholder {
  color: var(--muted);
}

.home-link,
.theme-toggle,
.sidebar-note-link {
  background: transparent;
  color: var(--text);
  padding: 10px 12px;
  text-align: left;
}

.home-link:hover,
.theme-toggle:hover,
.sidebar-note-link:hover,
.active-note {
  border-color: var(--accent);
  color: var(--accent);
}

.active-note {
  box-shadow: inset 4px 0 0 var(--accent);
}

#app-content {
  max-width: 1120px;
}

.home-hero {
  margin-bottom: 34px;
  border: 1px solid var(--border);
  border-radius: 24px;
  background:
    radial-gradient(
      circle at top left,
      rgba(0, 245, 255, 0.16),
      transparent 35%
    ),
    var(--sidebar);
  padding: 34px;
}

.home-kicker {
  color: var(--accent);
  font-family: "JetBrains Mono", monospace;
  font-size: 0.8rem;
  letter-spacing: 0.16em;
}

.home-hero h1 {
  margin: 12px 0;
  font-size: clamp(2rem, 5vw, 4rem);
  font-weight: 800;
}

.home-hero p {
  max-width: 680px;
  color: var(--muted);
  line-height: 1.8;
}

.recent-section h2,
.markdown-preview h1,
.markdown-preview h2,
.markdown-preview h3 {
  color: var(--accent);
}

.note-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  margin-top: 18px;
}

.note-card {
  min-height: 150px;
  border: 1px solid var(--border);
  border-radius: 18px;
  background: var(--sidebar);
  color: var(--text);
  cursor: pointer;
  padding: 20px;
  text-align: left;
}

.note-card:hover {
  border-color: var(--accent);
  transform: translateY(-3px);
}

.note-card h3 {
  margin-top: 0;
  color: var(--accent);
  font-size: 1rem;
}

.note-card small,
.muted-text {
  color: var(--muted);
}

.page-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: 30px;
}

.note-actions,
.editor-actions,
.toolbar,
.editor-footer {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.action-btn,
.toolbar-btn {
  background: transparent;
  color: var(--accent);
  padding: 9px 12px;
}

.danger-btn {
  color: var(--danger);
}

.markdown-preview {
  border: 1px solid var(--border);
  border-radius: 18px;
  background: var(--sidebar);
  padding: 24px;
}

.markdown-preview p {
  color: var(--text);
  line-height: 1.8;
}

.markdown-preview a {
  color: var(--accent);
}

.markdown-preview blockquote {
  border-left: 4px solid var(--secondary);
  margin-left: 0;
  padding-left: 16px;
  color: var(--muted);
}

.markdown-preview code,
code {
  border-radius: 6px;
  background: rgba(0, 0, 0, 0.25);
  color: var(--accent);
  font-family: "JetBrains Mono", monospace;
  padding: 3px 6px;
}

.markdown-preview pre {
  overflow-x: auto;
  border: 1px solid var(--border);
  border-radius: 14px;
  background: rgba(0, 0, 0, 0.25);
  padding: 18px;
  white-space: pre-wrap;
}

.markdown-preview pre code {
  background: transparent;
  padding: 0;
}

.markdown-preview table {
  width: 100%;
  border-collapse: collapse;
  margin: 20px 0;
}

.markdown-preview th,
.markdown-preview td {
  border: 1px solid var(--border);
  padding: 10px;
}

.editor-topbar {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 16px;
}

.note-title-input {
  flex: 1;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--sidebar);
  color: var(--text);
  font-size: 1.4rem;
  font-weight: 700;
  padding: 12px;
}

.save-status {
  color: var(--accent);
  font-size: 0.85rem;
}

.toolbar {
  margin-bottom: 16px;
}

.editor-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.note-editor {
  width: 100%;
  min-height: 60vh;
  resize: vertical;
  border: 1px solid var(--border);
  border-radius: 18px;
  background: var(--sidebar);
  color: var(--text);
  font-family: "JetBrains Mono", monospace;
  line-height: 1.7;
  padding: 20px;
}

.preview-column .markdown-preview {
  min-height: 60vh;
  height: 100%;
}

.editor-footer {
  align-items: center;
  margin-top: 14px;
}

.count-badge {
  border-radius: 999px;
  background: var(--accent);
  color: #001014;
  font-size: 0.78rem;
  font-weight: 800;
  padding: 6px 10px;
}

.shortcut-hint {
  margin-left: auto;
  color: var(--muted);
  font-size: 0.85rem;
}

@media (max-width: 980px) {
  .app-layout {
    grid-template-columns: 1fr;
  }

  .sidebar-panel {
    border-right: 0;
    border-bottom: 1px solid var(--border);
  }

  .content-panel {
    padding: 22px;
  }

  .note-grid,
  .editor-layout {
    grid-template-columns: 1fr;
  }

  .editor-topbar,
  .page-header {
    flex-direction: column;
  }

  .note-title-input,
  .note-actions,
  .editor-actions {
    width: 100%;
  }

  .shortcut-hint {
    width: 100%;
    margin-left: 0;
  }
}