* {
  box-sizing: border-box;
}

:root {
  color-scheme: light;
  font-family: "Pretendard Variable", Pretendard, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: #191919;
  background: #fff;
  font-synthesis: none;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  min-width: 320px;
  min-height: 100vh;
  margin: 0;
}

button,
input,
textarea {
  font: inherit;
}

.app-shell {
  display: flex;
  min-height: 100vh;
  min-height: 100dvh;
  flex-direction: column;
}

.board-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 18px 28px 12px;
}

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

.admin-controls {
  display: flex;
  align-items: center;
  gap: 8px;
}

.admin-badge {
  padding: 4px 6px;
  border: 1px solid #e3e3e3;
  border-radius: 5px;
  color: #777;
  font-size: 0.62rem;
  font-weight: 750;
  letter-spacing: 0.08em;
}

.history-controls {
  display: flex;
  align-items: center;
  gap: 8px;
}

.history-controls input {
  width: 148px;
  height: 36px;
  padding: 0 9px;
  border: 1px solid #e2e2e2;
  border-radius: 7px;
  background: #fff;
  color: #333;
  font-size: 0.84rem;
}

.button {
  display: inline-flex;
  min-height: 36px;
  align-items: center;
  justify-content: center;
  padding: 0 13px;
  border: 1px solid transparent;
  border-radius: 7px;
  cursor: pointer;
  font-size: 0.84rem;
  font-weight: 650;
  transition: background-color 120ms ease, border-color 120ms ease, transform 120ms ease;
}

.button:hover:not(:disabled) {
  transform: translateY(-1px);
}

.button:focus-visible,
input:focus-visible,
textarea:focus-visible {
  outline: 2px solid #555;
  outline-offset: 2px;
}

.button:disabled {
  cursor: wait;
  opacity: 0.55;
}

.button-light {
  border-color: #e2e2e2;
  background: #fff;
  color: #333;
}

.button-light:hover:not(:disabled) {
  background: #f6f6f6;
}

.button-dark,
.button-post {
  background: #222;
  color: #fff;
}

.button-dark:hover:not(:disabled),
.button-post:hover:not(:disabled) {
  background: #444;
}

.whiteboard {
  position: relative;
  width: 100%;
  min-height: 100vh;
  min-height: 100dvh;
  flex: 1;
  margin: 0;
  background-color: #fff;
  background-image: radial-gradient(#dedede 0.8px, transparent 0.8px);
  background-position: 10px 10px;
  background-size: 22px 22px;
}

.board-meta {
  display: flex;
  align-items: baseline;
  gap: 10px;
}

.board-meta h1 {
  margin: 0;
  font-size: 1.2rem;
  font-weight: 700;
  letter-spacing: -0.04em;
}

.board-status {
  margin: 0;
  color: #777;
  font-size: 0.78rem;
}

.notes-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 210px), 1fr));
  align-items: start;
  gap: 18px;
  padding: 14px 28px 190px;
}

.note-card {
  position: relative;
  display: flex;
  min-height: 150px;
  max-height: 280px;
  flex-direction: column;
  padding: 17px 17px 14px;
  overflow: hidden;
  border: 1px solid #e9e9e9;
  border-radius: 3px;
  background: #fff;
  box-shadow: 0 5px 13px rgb(0 0 0 / 8%), 0 1px 2px rgb(0 0 0 / 5%);
  transition: box-shadow 140ms ease, transform 140ms ease;
}

.note-card:nth-child(3n + 1) {
  background: #fff;
  transform: rotate(-0.7deg);
}

.note-card:nth-child(3n + 2) {
  background: #f8f8f8;
  transform: rotate(0.5deg);
}

.note-card:nth-child(3n) {
  background: #f1f1f1;
  transform: rotate(-0.25deg);
}

.note-card:hover {
  z-index: 1;
  box-shadow: 0 9px 20px rgb(0 0 0 / 11%), 0 2px 4px rgb(0 0 0 / 6%);
  transform: translateY(-3px) rotate(0);
}

.note-card-content {
  min-height: 0;
  flex: 1 1 auto;
  padding-right: 22px;
  overflow-x: hidden;
  overflow-y: auto;
  overflow-wrap: anywhere;
  scrollbar-color: #c9c9c9 transparent;
  scrollbar-width: thin;
}

.note-card-content:focus-visible {
  outline: 2px solid #888;
  outline-offset: -2px;
}

.note-card p {
  margin: 0;
  white-space: pre-wrap;
  line-height: 1.55;
}

.note-card time {
  display: block;
  flex: 0 0 auto;
  margin-top: 12px;
  color: #858585;
  font-size: 0.72rem;
}

.delete-note {
  position: absolute;
  z-index: 1;
  top: 7px;
  right: 7px;
  display: grid;
  width: 24px;
  height: 24px;
  place-items: center;
  padding: 0;
  border: 0;
  border-radius: 50%;
  background: transparent;
  color: #777;
  cursor: pointer;
  font-size: 1.1rem;
  line-height: 1;
}

.delete-note:hover {
  background: #e8e8e8;
  color: #222;
}

.empty-state {
  grid-column: 1 / -1;
  margin: 12vh 0 0;
  color: #888;
  font-size: 0.9rem;
  text-align: center;
}

.composer {
  position: fixed;
  z-index: 2;
  bottom: 22px;
  left: 50%;
  width: min(540px, calc(100% - 32px));
  padding: 12px 14px 9px;
  transform: translateX(-50%);
  border: 1px solid #dedede;
  border-radius: 10px;
  background: #fff;
  box-shadow: 0 8px 28px rgb(0 0 0 / 13%), 0 2px 6px rgb(0 0 0 / 5%);
}

.composer textarea {
  display: block;
  width: 100%;
  min-height: 48px;
  max-height: calc(10lh + 13px);
  overflow-y: auto;
  resize: none;
  padding: 4px 3px 9px;
  border: 0;
  border-radius: 4px;
  background: transparent;
  color: #191919;
  font-size: 0.98rem;
  line-height: 1.5;
}

.composer textarea::placeholder {
  color: #9a9a9a;
}

.composer textarea:focus-visible {
  outline-offset: 0;
}

.composer-footer,
.composer-actions {
  display: flex;
  align-items: center;
}

.composer-footer {
  justify-content: space-between;
  gap: 12px;
  padding-top: 5px;
  border-top: 1px solid #f0f0f0;
}

.composer-actions {
  gap: 12px;
}

.character-count {
  color: #929292;
  font-size: 0.72rem;
  font-variant-numeric: tabular-nums;
}

.character-count.over-limit {
  color: #222;
  font-weight: 700;
}

.shortcut-hint {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  color: #888;
  font-size: 0.7rem;
}

.shortcut-hint kbd {
  padding: 2px 5px;
  border: 1px solid #e5e5e5;
  border-radius: 4px;
  background: #fafafa;
  color: #666;
  font: inherit;
}

.button-post {
  min-width: 64px;
  min-height: 32px;
  padding: 0 12px;
}

.form-status {
  min-height: 0;
  margin: 0;
  color: #666;
  font-size: 0.76rem;
}

.form-status:not(:empty) {
  padding-top: 7px;
}

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

@media (max-width: 600px) {
  .board-toolbar {
    align-items: stretch;
    flex-direction: column;
    gap: 10px;
    padding: 12px 16px 10px;
  }

  .board-controls {
    align-self: stretch;
    gap: 5px;
  }

  .admin-controls {
    gap: 5px;
  }

  .history-controls {
    gap: 5px;
  }

  .history-controls input {
    width: 135px;
    height: 34px;
    padding: 0 5px;
    font-size: 0.75rem;
  }

  .button {
    min-height: 34px;
    padding: 0 9px;
    font-size: 0.78rem;
  }

  .notes-grid {
    grid-template-columns: repeat(auto-fill, minmax(min(100%, 170px), 1fr));
    gap: 12px;
    padding: 10px 16px 180px;
  }

  .note-card {
    min-height: 130px;
    max-height: 240px;
    padding: 14px;
  }

  .composer {
    bottom: 10px;
    width: calc(100% - 20px);
    padding: 10px 11px 8px;
  }

  .composer-actions {
    gap: 8px;
  }

  .character-count {
    font-size: 0.58rem;
  }

  .shortcut-hint {
    font-size: 0.65rem;
  }
}

@media (max-width: 380px) {
  .history-controls input {
    width: 125px;
  }
}

[hidden] {
  display: none !important;
}