:root {
  font-family:
    Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Microsoft YaHei", sans-serif;
  color: #1d2433;
  background: #eef1f6;
  font-synthesis: none;
  --purple: #6c5ce7;
  --purple-dark: #5746d8;
  --border: #e3e7ef;
  --muted: #7b8495;
  --shadow: 0 18px 60px rgba(34, 42, 61, 0.16);
}

* {
  box-sizing: border-box;
}

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

button,
input {
  font: inherit;
}

button {
  -webkit-tap-highlight-color: transparent;
}

.app-shell {
  display: grid;
  grid-template-rows: 56px minmax(0, 1fr);
  width: 100%;
  height: 100%;
  background: #fff;
}

.topbar {
  z-index: 30;
  display: grid;
  grid-template-columns: auto auto minmax(180px, 1fr) auto;
  align-items: center;
  gap: 18px;
  padding: 0 14px;
  border-bottom: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.96);
  box-shadow: 0 1px 0 rgba(25, 32, 48, 0.02);
}

.brand {
  display: flex;
  align-items: center;
  gap: 9px;
  min-width: 126px;
}

.brand-mark,
.dialog-mark {
  display: grid;
  place-items: center;
  width: 31px;
  height: 31px;
  border-radius: 10px;
  color: #fff;
  font-size: 15px;
  font-weight: 800;
  background: linear-gradient(145deg, #8172f2, #5b49da 72%);
  box-shadow: 0 7px 18px rgba(108, 92, 231, 0.27);
}

.brand-copy {
  display: flex;
  align-items: baseline;
  gap: 5px;
  white-space: nowrap;
}

.brand-copy strong {
  font-size: 15px;
  letter-spacing: -0.02em;
}

.brand-copy small {
  color: #9aa2b1;
  font-size: 8px;
  font-weight: 800;
  letter-spacing: 0.12em;
}

.toolbar,
.topbar-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

.button,
.icon-button {
  border: 1px solid var(--border);
  color: #3a4251;
  background: #fff;
  cursor: pointer;
  transition: 150ms ease;
}

.button:hover,
.icon-button:hover {
  border-color: #cfd5e1;
  background: #f7f8fb;
  transform: translateY(-1px);
}

.button:focus-visible,
.icon-button:focus-visible,
.deck-option:focus-visible {
  outline: 3px solid rgba(108, 92, 231, 0.24);
  outline-offset: 2px;
}

.button:disabled,
.icon-button:disabled {
  opacity: 0.4;
  cursor: default;
  transform: none;
}

.button {
  height: 34px;
  padding: 0 13px;
  border-radius: 9px;
  font-size: 13px;
  font-weight: 600;
}

.button-primary {
  border-color: var(--purple);
  color: #fff;
  background: var(--purple);
  box-shadow: 0 5px 13px rgba(108, 92, 231, 0.18);
}

.button-primary:hover {
  border-color: var(--purple-dark);
  background: var(--purple-dark);
}

.button-icon {
  margin-right: 5px;
  font-size: 16px;
  line-height: 0;
}

.icon-button {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  padding: 0;
  border-radius: 9px;
  font-size: 17px;
}

.document-meta {
  min-width: 0;
  text-align: center;
}

.document-title,
.document-path {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.document-title {
  color: #2f3746;
  font-size: 13px;
  font-weight: 650;
}

.document-path {
  margin-top: 2px;
  color: #9aa2b1;
  font-size: 10px;
}

.status-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  height: 28px;
  padding: 0 10px;
  border: 1px solid #e7eaf0;
  border-radius: 999px;
  color: #697386;
  background: #f8f9fb;
  font-size: 11px;
  font-weight: 650;
  white-space: nowrap;
}

.status-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #f5a623;
  box-shadow: 0 0 0 3px rgba(245, 166, 35, 0.12);
}

.status-ready .status-dot {
  background: #20b486;
  box-shadow: 0 0 0 3px rgba(32, 180, 134, 0.12);
}

.status-error .status-dot {
  background: #ef5b5b;
  box-shadow: 0 0 0 3px rgba(239, 91, 91, 0.12);
}

.save-state {
  min-width: 76px;
  color: #8992a2;
  font-size: 11px;
  text-align: right;
  white-space: nowrap;
}

.save-state[data-kind="saving"] {
  color: #8b72e8;
}

.save-state[data-kind="saved"] {
  color: #15956f;
}

.save-state[data-kind="error"] {
  color: #d94848;
}

.editor-stage {
  position: relative;
  min-width: 0;
  min-height: 0;
  overflow: hidden;
  background: #f0f2f6;
}

#editor {
  display: block;
  width: 100%;
  height: 100%;
  border: 0;
  background: #fff;
}

.loading-card {
  position: absolute;
  z-index: 18;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background:
    radial-gradient(circle at 50% 42%, rgba(108, 92, 231, 0.08), transparent 34%),
    #f7f8fb;
  transition: opacity 200ms ease;
}

.loading-card.is-hidden {
  visibility: hidden;
  pointer-events: none;
  opacity: 0;
}

.loading-card h1 {
  margin: 19px 0 7px;
  color: #252c3a;
  font-size: 19px;
  letter-spacing: -0.02em;
}

.loading-card p {
  margin: 0;
  color: #8a93a3;
  font-size: 13px;
}

.loading-orbit {
  width: 34px;
  height: 34px;
  border: 3px solid rgba(108, 92, 231, 0.14);
  border-top-color: var(--purple);
  border-radius: 50%;
  animation: spin 800ms linear infinite;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

.activity-panel {
  position: absolute;
  z-index: 35;
  top: 12px;
  right: 12px;
  bottom: 12px;
  display: grid;
  grid-template-rows: auto minmax(0, 1fr) auto;
  width: min(350px, calc(100% - 24px));
  overflow: hidden;
  border: 1px solid rgba(220, 224, 232, 0.9);
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.98);
  box-shadow: var(--shadow);
  opacity: 0;
  pointer-events: none;
  transform: translateX(calc(100% + 24px));
  transition: 200ms ease;
}

.activity-panel.is-open {
  opacity: 1;
  pointer-events: auto;
  transform: translateX(0);
}

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

.activity-header div {
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.activity-header strong {
  font-size: 15px;
}

.activity-header small {
  color: var(--muted);
  font-size: 11px;
}

.activity-list {
  margin: 0;
  padding: 9px 16px;
  overflow: auto;
  list-style: none;
}

.activity-list li {
  display: grid;
  grid-template-columns: 62px minmax(0, 1fr);
  gap: 8px;
  padding: 10px 0;
  border-bottom: 1px solid #f0f2f5;
  color: #535d6d;
  font-size: 12px;
  line-height: 1.5;
}

.activity-list time {
  color: #a0a8b5;
  font-variant-numeric: tabular-nums;
}

.activity-list li[data-tone="success"] span {
  color: #148264;
}

.activity-list li[data-tone="warning"] span {
  color: #a16a0b;
}

.activity-list li[data-tone="error"] span {
  color: #cc4545;
}

.activity-footer {
  padding: 13px 16px;
  border-top: 1px solid var(--border);
  color: #8b94a3;
  background: #fafbfc;
  font-size: 10px;
  line-height: 1.6;
}

.open-dialog,
.deck-dialog {
  width: min(520px, calc(100vw - 32px));
  padding: 0;
  border: 0;
  border-radius: 18px;
  color: #273041;
  background: #fff;
  box-shadow: var(--shadow);
}

.open-dialog {
  width: min(620px, calc(100vw - 32px));
}

.open-dialog::backdrop,
.deck-dialog::backdrop {
  background: rgba(24, 29, 42, 0.38);
  backdrop-filter: blur(4px);
}

.deck-dialog form {
  padding: 22px;
}

.open-dialog-shell {
  padding: 22px;
}

.open-dialog-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.upload-dropzone {
  display: flex;
  flex-direction: column;
  align-items: center;
  width: 100%;
  margin: 22px 0 14px;
  padding: 28px 22px 24px;
  border: 1.5px dashed #c9c2f3;
  border-radius: 16px;
  color: #353d4c;
  background: linear-gradient(180deg, #faf9ff, #f7f7fb);
  cursor: pointer;
  transition: 160ms ease;
}

.upload-dropzone:hover,
.upload-dropzone.is-dragging {
  border-color: var(--purple);
  background: #f3f0ff;
  box-shadow: inset 0 0 0 3px rgba(108, 92, 231, 0.08);
  transform: translateY(-1px);
}

.upload-dropzone strong {
  margin-top: 15px;
  font-size: 16px;
}

.upload-dropzone > span:not(.upload-illustration) {
  margin-top: 6px;
  color: #81899a;
  font-size: 12px;
}

.upload-dropzone em {
  margin-top: 12px;
  color: var(--purple);
  font-size: 11px;
  font-style: normal;
  font-weight: 650;
}

.upload-illustration {
  position: relative;
  display: block;
  width: 68px;
  height: 55px;
}

.upload-file {
  position: absolute;
  inset: 0 auto auto 5px;
  display: grid;
  place-items: center;
  width: 42px;
  height: 52px;
  border-radius: 10px;
  color: #fff;
  background: linear-gradient(145deg, #8172f2, #5b49da);
  box-shadow: 0 10px 25px rgba(108, 92, 231, 0.26);
  font-size: 14px;
  font-weight: 800;
}

.upload-arrow {
  position: absolute;
  right: 1px;
  bottom: -2px;
  display: grid;
  place-items: center;
  width: 30px;
  height: 30px;
  border: 4px solid #faf9ff;
  border-radius: 50%;
  color: var(--purple);
  background: #fff;
  box-shadow: 0 5px 16px rgba(54, 62, 82, 0.14);
  font-size: 16px;
  font-weight: 800;
}

.open-choice-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.open-choice {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 11px;
  min-width: 0;
  padding: 12px;
  border: 1px solid var(--border);
  border-radius: 13px;
  color: #303849;
  text-align: left;
  background: #fff;
  cursor: pointer;
  transition: 150ms ease;
}

.open-choice:hover {
  border-color: #cfc8f7;
  background: #faf9ff;
  transform: translateY(-1px);
}

.open-choice > span:nth-child(2) {
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.open-choice strong {
  font-size: 13px;
}

.open-choice small {
  margin-top: 3px;
  overflow: hidden;
  color: #8b94a3;
  font-size: 10px;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.choice-icon {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border-radius: 10px;
  color: #fff;
  background: var(--purple);
  font-size: 14px;
}

.choice-icon-muted {
  color: #6659c8;
  background: #eeeafd;
}

.open-dialog-note {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 8px;
  margin-top: 16px;
  padding: 11px 12px;
  border-radius: 10px;
  color: #7b8495;
  background: #f6f7f9;
  font-size: 10px;
  line-height: 1.55;
}

.dialog-heading {
  display: flex;
  align-items: center;
  gap: 13px;
}

.dialog-heading h2,
.dialog-heading p {
  margin: 0;
}

.dialog-heading h2 {
  font-size: 18px;
}

.dialog-heading p {
  margin-top: 4px;
  color: var(--muted);
  font-size: 12px;
}

.deck-options {
  display: grid;
  gap: 8px;
  max-height: 340px;
  margin: 20px 0;
  overflow: auto;
}

.deck-option {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 11px;
  width: 100%;
  padding: 11px;
  border: 1px solid var(--border);
  border-radius: 12px;
  color: inherit;
  text-align: left;
  background: #fff;
  cursor: pointer;
}

.deck-option:hover {
  border-color: #cfc8f7;
  background: #faf9ff;
}

.deck-option > span:nth-child(2) {
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.deck-option strong,
.deck-option small {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.deck-option strong {
  font-size: 13px;
}

.deck-option small {
  margin-top: 3px;
  color: var(--muted);
  font-size: 10px;
}

.deck-file-icon {
  display: grid;
  place-items: center;
  width: 32px;
  height: 38px;
  border-radius: 8px;
  color: #fff;
  background: #f06a45;
  font-size: 12px;
  font-weight: 800;
}

.dialog-actions {
  display: flex;
  justify-content: flex-end;
}

.toast-region {
  position: fixed;
  z-index: 100;
  right: 18px;
  bottom: 18px;
  display: grid;
  gap: 8px;
  pointer-events: none;
}

.toast {
  max-width: min(420px, calc(100vw - 36px));
  padding: 11px 14px;
  border: 1px solid #e3e7ef;
  border-radius: 11px;
  color: #394253;
  background: rgba(255, 255, 255, 0.98);
  box-shadow: 0 12px 34px rgba(35, 43, 60, 0.18);
  opacity: 0;
  transform: translateY(8px);
  transition: 180ms ease;
  font-size: 12px;
}

.toast.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.toast-error {
  border-color: #f1c7c7;
  color: #b43e3e;
}

.toast-warning {
  border-color: #efd8ad;
  color: #966512;
}

@media (max-width: 920px) {
  .topbar {
    grid-template-columns: auto auto 1fr;
    gap: 10px;
  }

  .document-meta {
    display: none;
  }

  .topbar-actions {
    justify-self: end;
  }

  .save-state {
    display: none;
  }
}

@media (max-width: 650px) {
  .app-shell {
    grid-template-rows: 52px minmax(0, 1fr);
  }

  .topbar {
    padding: 0 8px;
  }

  .brand-copy,
  .toolbar .button:not(.button-primary),
  .toolbar .icon-button,
  .status-pill {
    display: none;
  }

  .brand {
    min-width: auto;
  }

  .button-primary {
    max-width: 185px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }

  .open-choice-row {
    grid-template-columns: 1fr;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}