:root {
  color-scheme: light;
  --bg: #f7f8fb;
  --panel: rgba(255, 255, 255, 0.78);
  --panel-solid: #ffffff;
  --ink: #15191f;
  --muted: #707783;
  --line: rgba(60, 67, 80, 0.13);
  --coral: #e96550;
  --mint: #30b884;
  --gold: #d69b26;
  --blue: #0a84ff;
  --prose-ink: #232832;
  --prose-soft: #7a828f;
  --prose-code-bg: #f1f3f6;
  --prose-quote-bg: rgba(10, 132, 255, 0.075);
  --shadow: 0 14px 34px rgba(24, 31, 42, 0.09);
  --blur: blur(22px) saturate(1.4);
}

* {
  box-sizing: border-box;
}

[hidden] {
  display: none !important;
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--ink);
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    "Microsoft YaHei", sans-serif;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

button,
input,
textarea {
  font: inherit;
}

.app-shell {
  width: min(1120px, calc(100vw - 32px));
  margin: 0 auto;
  padding:
    max(18px, env(safe-area-inset-top))
    0
    max(28px, env(safe-area-inset-bottom));
}

.workspace {
  display: grid;
  grid-template-columns: minmax(280px, 380px) minmax(0, 1fr);
  gap: 18px;
  align-items: start;
}

.masthead {
  grid-column: 1 / -1;
  display: flex;
  justify-content: flex-end;
  align-items: end;
  gap: 18px;
  padding: 0 2px 2px;
}

.eyebrow {
  margin: 0 0 8px;
  color: var(--blue);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  margin: 0;
}

h1 {
  font-size: clamp(2.1rem, 5vw, 4.8rem);
  line-height: 0.96;
  letter-spacing: 0;
}

.status-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 34px;
  padding: 0 11px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.72);
  backdrop-filter: var(--blur);
  -webkit-backdrop-filter: var(--blur);
  color: var(--muted);
  font-size: 0.88rem;
  white-space: nowrap;
}

.status-dot {
  width: 9px;
  height: 9px;
  border-radius: 999px;
  background: var(--gold);
  box-shadow: 0 0 0 4px rgba(214, 165, 62, 0.14);
}

.status-pill.online .status-dot {
  background: var(--mint);
  box-shadow: 0 0 0 4px rgba(75, 169, 133, 0.14);
}

.status-pill.offline .status-dot {
  background: var(--coral);
  box-shadow: 0 0 0 4px rgba(233, 101, 80, 0.14);
}

.top-actions,
.board-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.logout-form {
  display: block;
}

.composer,
.board,
.detail-view {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  backdrop-filter: var(--blur);
  -webkit-backdrop-filter: var(--blur);
  box-shadow: var(--shadow);
}

.composer {
  position: sticky;
  top: max(14px, env(safe-area-inset-top));
  padding: 18px;
}

form {
  display: grid;
  gap: 14px;
}

label {
  display: grid;
  gap: 7px;
  color: var(--muted);
  font-size: 0.92rem;
  font-weight: 700;
}

input,
textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.86);
  color: var(--ink);
  outline: none;
}

input {
  height: 46px;
  padding: 0 12px;
}

textarea {
  min-height: 220px;
  resize: vertical;
  padding: 13px;
  line-height: 1.55;
}

input:focus,
textarea:focus {
  border-color: var(--blue);
  box-shadow: 0 0 0 3px rgba(61, 111, 158, 0.14);
}

.form-row {
  display: flex;
  align-items: end;
  justify-content: flex-end;
  gap: 12px;
}

fieldset {
  display: flex;
  align-items: center;
  gap: 8px;
  min-width: 0;
  margin: 0;
  padding: 0;
  border: 0;
}

legend {
  padding: 0;
  margin: 0 0 8px;
  color: var(--muted);
  font-size: 0.88rem;
  font-weight: 800;
}

.swatch-option {
  display: inline-grid;
  place-items: center;
  cursor: pointer;
}

.swatch-option input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.swatch {
  width: 30px;
  height: 30px;
  border: 2px solid transparent;
  border-radius: 999px;
}

.swatch-option input:checked + .swatch {
  border-color: var(--ink);
  box-shadow: 0 0 0 3px rgba(31, 42, 42, 0.12);
}

.coral {
  background: var(--coral);
}

.mint {
  background: var(--mint);
}

.gold {
  background: var(--gold);
}

.ink {
  background: var(--ink);
}

button {
  border: 0;
  border-radius: 8px;
  cursor: pointer;
  font-weight: 780;
  -webkit-tap-highlight-color: transparent;
}

#submit-button {
  min-width: 96px;
  height: 44px;
  padding: 0 18px;
  background: var(--blue);
  color: #ffffff;
}

#save-button {
  min-width: 84px;
  height: 44px;
  padding: 0 14px;
  background: var(--blue);
  color: #ffffff;
}

.ghost-button,
.delete-button,
.icon-button {
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.76);
  backdrop-filter: var(--blur);
  -webkit-backdrop-filter: var(--blur);
  color: var(--ink);
}

.ghost-button {
  height: 38px;
  padding: 0 14px;
}

.icon-button {
  display: inline-grid;
  place-items: center;
  width: 44px;
  height: 44px;
  color: var(--blue);
  font-size: 1.12rem;
  line-height: 1;
}

.delete-button {
  align-self: start;
  justify-self: end;
  width: 32px;
  height: 32px;
  padding: 0;
  color: #ff3b30;
  font-size: 1.1rem;
}

.board {
  min-height: 520px;
  padding: 18px;
}

.board-head {
  display: flex;
  justify-content: flex-end;
  align-items: center;
  gap: 12px;
  margin-bottom: 14px;
}

h2 {
  font-size: 1.1rem;
}

.notes-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(148px, 1fr));
  gap: 12px;
}

.note {
  display: grid;
  grid-template-rows: auto 1fr auto;
  gap: 12px;
  aspect-ratio: 1;
  min-height: 0;
  overflow: hidden;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel-solid);
  cursor: pointer;
  transition:
    border-color 160ms ease,
    transform 160ms ease,
    box-shadow 160ms ease;
}

.note:hover,
.note:focus-visible {
  border-color: var(--blue);
  transform: translateY(-1px);
  box-shadow: 0 10px 22px rgba(24, 31, 42, 0.08);
  outline: none;
}

.note-top {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 10px;
}

.note-accent {
  width: 12px;
  height: 12px;
  border-radius: 999px;
  background: var(--coral);
}

time {
  color: var(--muted);
  font-size: 0.8rem;
}

.note-preview {
  overflow: hidden;
  display: -webkit-box;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 6;
  color: #3a414c;
  font-size: 0.92rem;
  line-height: 1.5;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}

h3 {
  overflow-wrap: anywhere;
  font-size: 1.08rem;
  line-height: 1.28;
}

.markdown-body {
  overflow-wrap: anywhere;
  color: var(--prose-ink);
  font-size: 0.98rem;
  line-height: 1.72;
}

.markdown-body > * + * {
  margin-top: 0.95em;
}

.markdown-body p,
.markdown-body ul,
.markdown-body ol,
.markdown-body blockquote,
.markdown-body pre {
  margin: 0;
}

.markdown-body h3,
.markdown-body h4,
.markdown-body h5 {
  margin: 0;
  color: var(--ink);
  font-weight: 830;
  line-height: 1.26;
}

.markdown-body h3 {
  margin-top: 1.15em;
  padding-bottom: 0.28em;
  border-bottom: 1px solid rgba(223, 216, 205, 0.88);
  font-size: 1.25rem;
}

.markdown-body h4,
.markdown-body h5 {
  margin-top: 1em;
  font-size: 1.08rem;
}

.markdown-body ul,
.markdown-body ol {
  display: grid;
  gap: 0.34em;
  padding-left: 1.35em;
}

.markdown-body li + li {
  margin-top: 0;
}

.markdown-body blockquote {
  padding: 0.72em 0.9em;
  border-left: 4px solid var(--blue);
  border-radius: 0 8px 8px 0;
  background: var(--prose-quote-bg);
  color: var(--ink);
}

.markdown-body code {
  padding: 0.16em 0.38em;
  border: 1px solid rgba(223, 216, 205, 0.9);
  border-radius: 6px;
  background: var(--prose-code-bg);
  color: var(--ink);
  font-family: ui-monospace, SFMono-Regular, Consolas, "Liberation Mono", monospace;
  font-size: 0.88em;
}

.markdown-body pre {
  overflow-x: auto;
  padding: 13px 14px;
  border: 1px solid rgba(31, 42, 42, 0.1);
  border-radius: 8px;
  background: #202a2a;
  color: #f8f4ec;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.05);
}

.markdown-body pre code {
  padding: 0;
  background: transparent;
  color: inherit;
}

.markdown-body a {
  color: var(--blue);
  font-weight: 750;
  text-decoration-thickness: 0.08em;
  text-underline-offset: 0.18em;
}

.markdown-body hr {
  border: 0;
  border-top: 1px solid var(--line);
  margin: 1.25em 0;
}

.markdown-body strong {
  color: var(--ink);
}

.markdown-body del {
  color: var(--prose-soft);
}

.detail-view {
  grid-column: 1 / -1;
  display: grid;
  gap: 16px;
  min-height: 620px;
  padding: 18px;
}

.detail-toolbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 10px;
}

.detail-rendered {
  width: min(100%, 780px);
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel-solid);
}

.detail-rendered.markdown-body {
  padding: 22px;
  font-size: 1.02rem;
}

.detail-editor textarea {
  min-height: 260px;
}

.empty-state {
  grid-column: 1 / -1;
  padding: 48px 18px;
  border: 1px dashed var(--line);
  border-radius: 8px;
  color: var(--muted);
  text-align: center;
}

.login-shell {
  min-height: 100vh;
  display: grid;
  place-items: center;
  width: min(100% - 32px, 460px);
  margin: 0 auto;
  padding:
    max(24px, env(safe-area-inset-top))
    0
    max(28px, env(safe-area-inset-bottom));
}

.login-panel {
  width: 100%;
  display: grid;
  gap: 18px;
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  backdrop-filter: var(--blur);
  -webkit-backdrop-filter: var(--blur);
  box-shadow: var(--shadow);
}

.login-panel h1 {
  font-size: clamp(2rem, 9vw, 3.4rem);
}

.login-error {
  color: var(--coral);
  font-weight: 750;
}

#login-button {
  height: 46px;
  background: var(--blue);
  color: #ffffff;
}

@media (max-width: 820px) {
  .app-shell {
    width: min(100% - 20px, 680px);
    padding: 18px 0;
  }

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

  .masthead {
    align-items: start;
    flex-direction: column;
  }

  .top-actions,
  .board-actions {
    justify-content: flex-start;
    width: 100%;
  }

  .composer {
    position: static;
  }

  .board-head {
    align-items: start;
    flex-direction: column;
  }

  .form-row {
    align-items: stretch;
    flex-direction: column;
  }

  #submit-button {
    width: 100%;
  }
}