:root {
  --snow: #fefefe;
  --ice-blue: #f9fbfd;
  --warm-beige: #fcfcfb;
  --canvas: #fefefe;
  --paper: #faf9f7;
  --text-soft: #3a424c;
  --text-muted: #6b7580;
  --text-heading: #2a3340;
  --accent: #7a9bb8;
  --accent-hover: #5f82a0;
  --border-soft: rgba(122, 155, 184, 0.2);
  --shadow-soft: 0 4px 24px rgba(42, 51, 64, 0.06);
  --radius-btn: 10px;
  --surface-glass: rgba(255, 255, 255, 0.65);
  --font-mono: 'JetBrains Mono', Menlo, Consolas, monospace;
  --font-serif: 'Cormorant Garamond', Georgia, 'Times New Roman', serif;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

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

body {
  font-family: var(--font-mono);
  font-size: 15px;
  color: var(--text-soft);
  background: linear-gradient(
    180deg,
    var(--canvas) 0%,
    var(--snow) 40%,
    var(--ice-blue) 78%,
    var(--warm-beige) 100%
  );
  background-attachment: fixed;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

#root {
  min-height: 100%;
}

.app {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  max-width: none;
  width: 100%;
  margin: 0 auto;
  padding: 1.25rem 1.5rem 1rem;
}

.app-header {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1.25rem;
}

.app-title {
  margin: 0;
  font-family: var(--font-serif);
  font-size: 2rem;
  font-weight: 600;
  color: var(--text-heading);
  letter-spacing: 0.02em;
}

.app-subtitle {
  margin: 0.25rem 0 0;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--text-muted);
  font-weight: 400;
}

.mode-switch {
  display: inline-flex;
  margin-top: 0.75rem;
  padding: 0.2rem;
  background: var(--surface-glass);
  border: 1px solid var(--border-soft);
  border-radius: 999px;
  gap: 0.15rem;
  backdrop-filter: blur(6px);
}

.mode-switch__btn {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  padding: 0.4rem 0.85rem;
  border: none;
  border-radius: 999px;
  background: transparent;
  color: var(--text-muted);
  cursor: pointer;
  transition:
    background 0.2s ease,
    color 0.2s ease,
    box-shadow 0.2s ease;
}

.mode-switch__btn:hover {
  color: var(--text-soft);
}

.mode-switch__btn.is-active {
  background: rgba(255, 255, 255, 0.92);
  color: var(--text-heading);
  box-shadow: 0 1px 4px rgba(42, 51, 64, 0.06);
}

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

.btn {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  padding: 0.5rem 1rem;
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-btn);
  background: var(--surface-glass);
  color: var(--text-soft);
  cursor: pointer;
  transition:
    background 0.2s ease,
    border-color 0.2s ease,
    box-shadow 0.2s ease,
    transform 0.15s ease;
  box-shadow: 0 1px 2px rgba(42, 51, 64, 0.03);
  backdrop-filter: blur(6px);
}

.btn:hover {
  background: rgba(255, 255, 255, 0.88);
  border-color: rgba(122, 155, 184, 0.35);
  box-shadow: var(--shadow-soft);
  transform: translateY(-1px);
}

.btn:active {
  transform: translateY(0);
}

.btn-ghost:hover {
  background: rgba(245, 240, 232, 0.9);
}

.btn-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.55rem;
  min-width: 2.25rem;
  min-height: 2.25rem;
}

.btn-icon svg {
  width: 1.15rem;
  height: 1.15rem;
  flex-shrink: 0;
  color: var(--text-soft);
  transition: color 0.2s ease;
}

.btn-icon:hover svg,
.btn-icon:focus-visible svg {
  color: var(--accent-hover);
}

.btn-icon:focus-visible {
  outline: 2px solid rgba(122, 155, 184, 0.45);
  outline-offset: 2px;
}

.file-input-hidden {
  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: 1fr auto 1fr;
  gap: 0;
  flex: 1;
  min-height: 0;
}

.layout-divider {
  position: relative;
  align-self: stretch;
  width: 2rem;
  flex-shrink: 0;
  pointer-events: none;
}

.layout-divider::before {
  content: '';
  position: absolute;
  top: 0;
  bottom: 0;
  left: 50%;
  width: 1px;
  transform: translateX(-50%);
  background: linear-gradient(
    to bottom,
    transparent 0%,
    rgba(122, 155, 184, 0.12) 12%,
    rgba(122, 155, 184, 0.32) 50%,
    rgba(122, 155, 184, 0.12) 88%,
    transparent 100%
  );
}

.layout-divider::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 6px;
  height: 6px;
  transform: translate(-50%, -50%);
  border-radius: 50%;
  background: radial-gradient(
    circle at 35% 35%,
    #ffffff 0%,
    rgba(232, 240, 247, 0.95) 45%,
    rgba(122, 155, 184, 0.25) 100%
  );
  box-shadow:
    0 0 0 1px rgba(122, 155, 184, 0.15),
    0 0 14px rgba(232, 240, 247, 0.9);
}

@media (max-width: 768px) {
  .app-layout {
    grid-template-columns: 1fr;
    grid-template-rows: minmax(240px, 1fr) auto minmax(240px, 1fr);
  }

  .layout-divider {
    width: 100%;
    height: 2rem;
    margin: 0.5rem 0;
  }

  .layout-divider::before {
    top: 50%;
    bottom: auto;
    left: 0;
    right: 0;
    width: auto;
    height: 1px;
    transform: translateY(-50%);
    background: linear-gradient(
      to right,
      transparent 0%,
      rgba(122, 155, 184, 0.12) 12%,
      rgba(122, 155, 184, 0.32) 50%,
      rgba(122, 155, 184, 0.12) 88%,
      transparent 100%
    );
  }

  .app {
    padding: 1rem;
  }

  .app-title {
    font-size: 1.6rem;
  }
}

.panel {
  display: flex;
  flex-direction: column;
  background: transparent;
  overflow: hidden;
  min-height: 320px;
}

.panel-editor,
.panel-preview {
  min-height: 0;
}

@media (min-width: 769px) {
  .panel {
    min-height: calc(100vh - 11rem);
  }

  .panel-editor .editor {
    min-height: 0;
  }
}

.panel-label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--text-muted);
  opacity: 0.75;
  padding: 0.5rem 0.75rem 0.35rem;
}

.panel-editor .editor {
  flex: 1;
  width: 100%;
  min-height: 280px;
  margin: 0;
  padding: 0.5rem 0.75rem 1.25rem;
  border: none;
  background: transparent;
  font-family: var(--font-mono);
  font-size: 0.9rem;
  line-height: 1.65;
  color: var(--text-soft);
  caret-color: var(--accent);
  resize: none;
  outline: none;
  overflow-y: auto;
}

.panel-editor .editor:focus {
  outline: none;
  box-shadow: 0 0 0 1px rgba(122, 155, 184, 0.2);
}

.panel-editor .editor::placeholder {
  color: var(--text-muted);
  opacity: 0.6;
}

.preview-paper {
  flex: 1;
  overflow-y: auto;
  min-height: 0;
  padding: 0.5rem 0.75rem 1.5rem;
  font-family: var(--font-serif);
  font-size: 1.15rem;
  line-height: 1.75;
  color: var(--text-soft);
  transition: opacity 0.2s ease;
}

.preview-paper.preview-updating {
  opacity: 0.72;
}

.preview-paper h1,
.preview-paper h2,
.preview-paper h3,
.preview-paper h4 {
  font-family: var(--font-serif);
  color: var(--text-heading);
  font-weight: 600;
  margin-top: 1.25em;
  margin-bottom: 0.5em;
  line-height: 1.3;
}

.preview-paper h1 {
  font-size: 1.85rem;
  margin-top: 0;
}

.preview-paper h2 {
  font-size: 1.45rem;
}

.preview-paper h3 {
  font-size: 1.2rem;
}

.preview-paper p {
  margin: 0.75em 0;
}

.preview-paper ul,
.preview-paper ol {
  margin: 0.75em 0;
  padding-left: 1.5em;
}

.preview-paper li {
  margin: 0.35em 0;
}

.preview-paper blockquote {
  margin: 1em 0;
  padding: 0.5em 1em;
  border-left: 3px solid var(--accent);
  background: rgba(232, 240, 247, 0.75);
  color: var(--text-muted);
  font-style: italic;
}

.preview-paper code {
  font-family: var(--font-mono);
  font-size: 0.85em;
  background: var(--ice-blue);
  padding: 0.15em 0.4em;
  border-radius: 4px;
}

.preview-paper pre {
  margin: 1em 0;
  padding: 1em 1.25em;
  background: rgba(238, 242, 246, 0.9);
  border-radius: 8px;
  overflow-x: auto;
  border: 1px solid var(--border-soft);
}

.preview-paper pre code {
  background: none;
  padding: 0;
  font-size: 0.8rem;
}

.preview-paper a {
  color: var(--accent-hover);
  text-decoration: none;
  border-bottom: 1px solid rgba(95, 130, 160, 0.3);
}

.preview-paper a:hover {
  border-bottom-color: var(--accent-hover);
}

.preview-paper hr {
  border: none;
  border-top: 1px solid var(--border-soft);
  margin: 1.5em 0;
}

.preview-paper strong {
  font-weight: 600;
  color: var(--text-heading);
}

.org-badge {
  display: inline-flex;
  align-items: center;
  padding: 0.15rem 0.45rem;
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  margin-right: 0.45rem;
  vertical-align: middle;
}

.org-todo {
  background: #f3e8eb;
  color: #7a4a52;
}

.org-done {
  background: #e5efe8;
  color: #3d5c4a;
}

.app-footer {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  margin-top: 1rem;
  padding: 0.75rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
}

.app-footer-stats {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.footer-separator {
  opacity: 0.5;
}

.app-meta {
  margin: 0;
  font-size: 0.7rem;
  color: var(--text-muted);
  opacity: 0.85;
}

.app-meta a {
  color: var(--accent-hover);
  text-decoration: none;
  border-bottom: 1px solid rgba(95, 130, 160, 0.25);
}

.app-meta a:hover {
  border-bottom-color: var(--accent-hover);
}

.app-storage-warning {
  margin: 0;
  font-size: 0.7rem;
  color: #8b5a4a;
  text-align: center;
  max-width: 28rem;
}

.app-header-top {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem 0.75rem;
}

.badge {
  display: inline-block;
  padding: 0.15rem 0.55rem;
  font-size: 0.65rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  border-radius: 999px;
  border: 1px solid var(--border-soft);
  background: var(--surface-glass);
  color: var(--text-muted);
}

.badge--local {
  color: var(--accent-hover);
  border-color: rgba(122, 155, 184, 0.35);
}

.badge--shared {
  color: #4a6a85;
}

.badge--readonly {
  color: #6b7580;
}

.badge--editing {
  color: #3d5c4a;
  border-color: rgba(61, 92, 74, 0.25);
  background: #e5efe8;
}

.save-status {
  font-size: 0.75rem;
  color: var(--text-muted);
  align-self: center;
}

.save-status--saved {
  color: #3d5c4a;
}

.save-status--saving {
  color: var(--accent);
}

.save-status--error,
.save-status--no_permission {
  color: #8b5a4a;
}

.alert-banner {
  margin: 0 0 1rem;
  padding: 0.85rem 1rem;
  border-radius: var(--radius-btn);
  border: 1px solid var(--border-soft);
  background: var(--ice-blue);
}

.alert-banner p {
  margin: 0;
  font-size: 0.85rem;
}

.alert-banner__meta {
  margin-top: 0.35rem !important;
  font-size: 0.75rem !important;
  color: var(--text-muted);
}

.alert-banner--warning {
  background: #fdf8f6;
  border-color: rgba(139, 90, 74, 0.25);
  color: #6b4a42;
}

.modal-backdrop {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
  background: rgba(42, 51, 64, 0.25);
  backdrop-filter: blur(4px);
}

.modal {
  width: min(100%, 28rem);
  max-height: 90vh;
  overflow-y: auto;
  padding: 1.25rem 1.35rem;
  border-radius: 14px;
  border: 1px solid var(--border-soft);
  background: var(--snow);
  box-shadow: var(--shadow-soft);
}

.modal__title {
  margin: 0 0 1rem;
  font-family: var(--font-serif);
  font-size: 1.35rem;
  font-weight: 600;
  color: var(--text-heading);
}

.modal__actions {
  display: flex;
  justify-content: flex-end;
  gap: 0.5rem;
  margin-top: 1rem;
}

.share-field {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  margin-bottom: 0.85rem;
  font-size: 0.8rem;
  color: var(--text-muted);
}

.share-field input[type='text'] {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  padding: 0.45rem 0.55rem;
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-btn);
  background: var(--paper);
  color: var(--text-soft);
}

.share-field legend {
  margin-bottom: 0.35rem;
}

.share-radio {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  margin-bottom: 0.25rem;
  color: var(--text-soft);
  cursor: pointer;
}

.share-copy-row {
  display: flex;
  gap: 0.4rem;
}

.share-copy-row input {
  flex: 1;
  min-width: 0;
}

.share-error {
  margin: 0;
  font-size: 0.8rem;
  color: #8b5a4a;
}

.share-result__expiry {
  margin: 0 0 0.85rem;
  font-size: 0.8rem;
  color: var(--accent-hover);
}

.doc-title-input {
  flex: 1;
  min-width: 8rem;
  margin: 0;
  padding: 0;
  border: none;
  background: transparent;
  font-family: var(--font-serif);
  font-size: 2rem;
  font-weight: 600;
  color: var(--text-heading);
}

.doc-title-input:focus {
  outline: 2px solid rgba(122, 155, 184, 0.35);
  outline-offset: 2px;
  border-radius: 4px;
}

.app-layout--preview-only {
  grid-template-columns: 1fr;
}

.panel-preview--full {
  min-height: 50vh;
}

.app-footer-stats--inline {
  margin-top: 0.75rem;
  text-align: center;
  font-size: 0.75rem;
  color: var(--text-muted);
}

.page-loading {
  text-align: center;
  padding: 3rem 1rem;
  color: var(--text-muted);
}

.link-error-page__main {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  text-align: center;
  padding: 2rem 1rem;
}

.link-error-page__main h2 {
  margin: 0;
  font-family: var(--font-serif);
  font-size: 1.5rem;
  color: var(--text-heading);
}

@media (prefers-reduced-motion: reduce) {
  .btn,
  .mode-switch__btn,
  .preview-paper {
    transition: none;
  }

  .btn:hover {
    transform: none;
  }

  .preview-paper.preview-updating {
    opacity: 1;
  }
}