@font-face {
  font-family: "Letter Note";
  src: url("./fonts/hand/auth-quote.woff2") format("woff2");
  font-display: swap;
}
@font-face {
  font-family: "Letter Hand";
  src: url("./fonts/hand/ma-shan-zheng.woff2") format("woff2");
  font-display: swap;
}
html[data-private] body {
  visibility: hidden;
}
html {
  scroll-padding-top: 24px;
}
.auth-problem {
  max-width: 540px;
  margin: 20vh auto;
  padding: 32px;
  background: var(--ivory);
  border: 1px solid var(--paper-edge);
  border-radius: 22px;
}
.auth-problem .text-link {
  display: block;
  margin-top: 22px;
}
.account-bar {
  max-width: 1130px;
  margin: 0 auto 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  font: 12px/1.5 var(--letter-ui);
}
.mail-brand {
  font-family: var(--letter-serif);
  font-size: 17px;
  color: var(--ink);
  text-decoration: none;
  white-space: nowrap;
}
.account-actions {
  display: flex;
  gap: 14px;
  align-items: center;
}
.account-link {
  color: var(--ink-soft);
  background: none;
  border: 0;
  text-decoration: none;
  cursor: pointer;
  font: inherit;
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 5px 0;
}
.account-name {
  max-width: 100px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  color: var(--ink-soft);
}
.theme-modes {
  display: flex;
  gap: 3px;
  padding: 3px;
  border: 1px solid var(--paper-edge);
  border-radius: 24px;
  background: var(--ivory);
}
.theme-button {
  font: 11px/1.5 var(--letter-ui);
  padding: 5px 9px;
  border: 0;
  background: transparent;
  border-radius: 20px;
  color: var(--ink-soft);
  cursor: pointer;
}
.theme-button[aria-pressed="true"] {
  background: var(--apricot);
  color: var(--ink);
}
.unread-badge {
  display: inline-flex;
  min-width: 17px;
  height: 17px;
  align-items: center;
  justify-content: center;
  padding: 0 4px;
  background: #bf6348;
  color: #fffaf1;
  font: 10px/1 var(--letter-ui);
  border-radius: 20px;
}
.unread-badge[hidden] {
  display: none;
}
.mail-toast {
  position: fixed;
  z-index: 1500;
  bottom: 95px;
  left: 50%;
  transform: translateX(-50%);
  max-width: min(90vw, 560px);
  padding: 14px 24px;
  border: 1px solid var(--paper-edge);
  border-radius: 18px;
  background: var(--ivory);
  color: var(--ink);
  box-shadow: 0 10px 40px var(--warm-shadow);
  font: 14px/1.6 var(--letter-ui);
}
.soft-button {
  border: 1px solid var(--paper-edge);
  border-radius: 30px;
  background: var(--ivory);
  color: var(--ink);
  padding: 9px 17px;
  font: 13px/1.5 var(--letter-ui);
  cursor: pointer;
  transition:
    transform 0.25s,
    box-shadow 0.25s;
}
.soft-button:hover {
  transform: translateY(-2px);
  box-shadow: 0 7px 18px var(--warm-shadow);
}
button:disabled {
  cursor: wait;
  opacity: 0.65;
}
a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible,
summary:focus-visible {
  outline: 2px solid var(--orange);
  outline-offset: 4px;
}
.mail-badges {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  margin: 9px 0;
}
.tag-pill {
  display: inline-block;
  padding: 3px 9px;
  border: 1px solid var(--paper-edge);
  border-radius: 20px;
  background: rgba(243, 221, 200, 0.48);
  color: var(--ink-soft);
  font: 11px/1.5 var(--letter-ui);
}
.letter-features {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin: 0 0 28px;
  padding-bottom: 20px;
  border-bottom: 1px dashed var(--paper-edge);
  font-family: var(--letter-ui);
}
.mini-label {
  display: grid;
  gap: 5px;
  color: var(--ink-soft);
  font: 11px/1.5 var(--letter-ui);
}
.mini-select {
  min-height: 36px;
  max-width: 100%;
  border: 1px solid var(--paper-edge);
  border-radius: 9px;
  padding: 5px 9px;
  background: var(--ivory);
  color: var(--ink);
  font: 13px/1.4 var(--letter-ui);
}
.export-actions {
  display: flex;
  align-items: end;
  gap: 8px;
}
.letter-tags {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
}
.tag-editor {
  width: 100%;
  font: 12px/1.7 var(--letter-ui);
  color: var(--ink-soft);
}
.tag-editor summary {
  cursor: pointer;
}
.tag-editor .form-field {
  width: min(100%, 340px);
  font: 14px var(--letter-ui);
  padding: 9px;
  margin: 10px 8px 0 0;
}
.letter-paper,
.preview-paper {
  position: relative;
}
.letter-paper[data-paper="ruled"],
.preview-paper[data-paper="ruled"] {
  background-color: #fffaf1;
  background-image: repeating-linear-gradient(
    to bottom,
    transparent 0,
    transparent 34px,
    rgba(135, 94, 63, 0.13) 35px,
    transparent 36px
  );
}
.letter-paper[data-paper="kraft"],
.preview-paper[data-paper="kraft"] {
  background: #e8c7a2;
  background-image: radial-gradient(
    rgba(135, 94, 63, 0.11) 0.6px,
    transparent 0.6px
  );
  background-size: 5px 5px;
}
.letter-paper[data-paper="plain"],
.preview-paper[data-paper="plain"] {
  background: var(--ivory);
}
.letter-paper .kami-letter,
.preview-paper .kami-letter {
  color: var(--letter-ink, var(--ink));
}
.letter-paper[data-font="hand"] .kami-letter,
.preview-paper[data-font="hand"] .kami-letter {
  font-family: "Letter Hand", var(--letter-serif);
  letter-spacing: 0.03em;
}
.paper-cat {
  position: absolute;
  right: 26px;
  top: calc(100% - 110px);
  width: 72px;
  height: 72px;
  object-fit: contain;
  opacity: 0.9;
  pointer-events: none;
  transform: rotate(7deg);
}
.letter-paper:has(> .paper-cat),
.preview-paper:has(> .paper-cat) {
  padding-bottom: 128px;
}
.compose-options {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  padding: 18px 0;
  border: 0;
  margin: 4px 0 0;
  min-width: 0;
}
.compose-options .form-label {
  min-width: 0;
}
.compose-options select {
  width: 100%;
  font-size: 16px;
}
.compose-wide {
  grid-column: 1/-1;
}
.sticker-picker {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 8px;
  margin: 12px 0;
}
.cat-choice {
  padding: 8px 3px 5px;
  border: 1px solid var(--paper-edge);
  background: var(--ivory);
  border-radius: 12px;
  color: var(--ink-soft);
  cursor: pointer;
  transition:
    transform 0.3s,
    background 0.3s;
}
.cat-choice img {
  display: block;
  width: 100%;
  height: 39px;
  object-fit: contain;
}
.cat-choice span {
  font: 10px var(--letter-ui);
}
.cat-choice[aria-pressed="true"] {
  background: var(--apricot);
  border-color: var(--orange);
  transform: translateY(-3px) rotate(-2deg);
}
.draft-actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}
.draft-note {
  font: 12px/1.6 var(--letter-ui);
  color: var(--ink-soft);
}
.schedule-hint {
  font: 12px/1.7 var(--letter-ui);
  color: var(--ink-soft);
  margin: 0;
}
.compose-card input[type="datetime-local"] {
  font: 14px var(--letter-ui);
}
.collection-advanced {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: end;
  margin: 18px 0;
}
.collection-advanced > label {
  flex: 1;
  min-width: 130px;
}
.view-switch {
  display: flex;
  gap: 4px;
  background: var(--ivory);
  padding: 4px;
  border: 1px solid var(--paper-edge);
  border-radius: 30px;
}
.view-switch button {
  border: 0;
  background: none;
  color: var(--ink-soft);
  border-radius: 20px;
  padding: 9px 16px;
  font: 13px var(--letter-ui);
  cursor: pointer;
}
.view-switch button[aria-pressed="true"] {
  background: var(--apricot);
  color: var(--ink);
}
.timeline-grid {
  display: block !important;
  max-width: 820px;
  margin: 35px auto;
  padding-left: 28px;
  border-left: 1px solid var(--paper-edge);
}
.timeline-grid .letter-card {
  position: relative;
  max-width: 100%;
  margin: 0 0 24px;
  padding: 25px 30px;
  background: var(--ivory);
  border: 1px solid var(--paper-edge);
  border-radius: 4px 20px 20px 20px;
  list-style: none;
  animation: mail-rise 0.45s both;
}
.timeline-grid .letter-card::before {
  content: "";
  position: absolute;
  left: -34px;
  top: 35px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--orange);
  box-shadow: 0 0 0 5px var(--cream);
}
.timeline-title {
  display: block;
  padding: 0;
  border: 0;
  background: none;
  color: var(--ink);
  font: 24px/1.6 var(--letter-serif);
  text-align: left;
  cursor: pointer;
}
.timeline-excerpt {
  margin: 12px 0;
  display: -webkit-box;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 3;
  overflow: hidden;
  font-size: 16px;
  line-height: 1.8;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}
.timeline-open-hint {
  font: 12px var(--letter-ui);
  color: var(--orange);
}
.timeline-grid .archive-sheet {
  position: absolute;
  inset: 0;
  opacity: 0;
  pointer-events: none;
}
.timeline-trigger {
  display: block;
  width: 100%;
  text-align: left;
  padding: 0;
  border: 0;
  background: none;
  position: relative;
  color: inherit;
  cursor: pointer;
}
.timeline-trigger h2 {
  font: 24px/1.6 var(--letter-serif);
  margin: 8px 0;
}
.draft-grid,
.inbox-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px;
  margin: 28px 0;
  padding: 0;
  list-style: none;
}
.draft-card,
.inbox-card {
  position: relative;
  background: var(--ivory);
  padding: 28px;
  border: 1px solid var(--paper-edge);
  border-radius: 6px 22px 22px 22px;
  box-shadow: 0 10px 30px var(--warm-shadow);
  animation: mail-rise 0.5s both;
  overflow-wrap: anywhere;
}
.draft-card::before {
  content: "";
  display: block;
  width: 54px;
  height: 15px;
  background: rgba(223, 177, 139, 0.42);
  position: absolute;
  top: -7px;
  left: 35px;
  transform: rotate(-4deg);
}
.draft-card h2,
.inbox-card h2 {
  font: 23px/1.5 var(--letter-serif);
  margin: 12px 0;
}
.draft-excerpt {
  white-space: pre-wrap;
  display: -webkit-box;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 3;
  overflow: hidden;
  line-height: 1.8;
  margin: 15px 0;
}
.inbox-card details {
  margin: 15px 0;
}
.inbox-card .reply-full {
  white-space: pre-wrap;
  line-height: 1.9;
  padding-top: 15px;
}
.inbox-card summary {
  cursor: pointer;
  color: var(--orange);
}
.inbox-card.is-unread {
  border-left: 3px solid var(--orange);
}
.inbox-card.is-unread h2::before {
  content: "";
  display: inline-block;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #bf6348;
  margin-right: 8px;
}
.draft-empty {
  padding: 60px 30px;
  text-align: center;
  background: var(--ivory);
  border: 1px dashed var(--paper-edge);
  border-radius: 24px;
}
.locked-letter {
  padding: 48px 20px;
  text-align: center;
  color: var(--ink-soft);
  font-size: 20px;
  line-height: 2;
}
.auth-page {
  min-height: 100vh;
}
.auth-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(380px, 480px);
  gap: clamp(36px, 7vw, 100px);
  max-width: 1180px;
  margin: 0 auto;
  padding: 50px 38px;
  align-items: center;
  min-height: 100vh;
}
.auth-story {
  position: relative;
  align-self: stretch;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 24px 0;
}
.auth-brand {
  font: 10px/1.5 var(--letter-ui);
  letter-spacing: 0.2em;
  color: var(--ink-soft);
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 45px;
}
.brand-seal {
  display: grid;
  place-items: center;
  width: 39px;
  height: 39px;
  border: 1px solid var(--kraft);
  border-radius: 50%;
  font-size: 26px;
  color: var(--orange);
}
.auth-story h1 {
  font: clamp(31px, 3.8vw, 46px) / 1.6 var(--letter-serif);
  font-weight: 500;
  letter-spacing: 0.04em;
  margin: 12px 0 18px;
}
.auth-story .view-kicker {
  text-align: left;
}
.auth-intro {
  font-size: 16px;
  line-height: 1.9;
  color: var(--ink-soft);
  margin: 0;
}
.auth-still-life {
  height: 260px;
  position: relative;
  max-width: 410px;
  margin: 30px 0 16px;
}
.auth-postcard {
  position: absolute;
  width: 230px;
  height: 205px;
  top: 0;
  left: 50px;
  transform: rotate(-7deg);
  padding: 25px 28px;
  background: var(--ivory);
  box-shadow: 0 10px 50px var(--warm-shadow);
  animation: auth-float 6s ease-in-out infinite;
}
.auth-postcard span {
  font: 22px var(--letter-serif);
  color: var(--ink);
}
.auth-postcard i {
  display: block;
  width: 75%;
  height: 1px;
  background: var(--paper-edge);
  margin-top: 20px;
}
.auth-postcard img {
  position: absolute;
  width: 65px;
  bottom: 18px;
  right: 18px;
}
.auth-envelope-art {
  position: absolute;
  bottom: 8px;
  left: 20px;
  width: 320px;
  height: 155px;
  border-radius: 4px 4px 12px 12px;
  background: var(--kraft-light);
  clip-path: polygon(0 0, 50% 40%, 100% 0, 100% 100%, 0 100%);
  display: grid;
  place-items: center;
  color: var(--orange);
  font-size: 45px;
  filter: drop-shadow(0 12px 15px var(--warm-shadow));
}
.auth-paper-note {
  position: absolute;
  right: 0;
  bottom: 14px;
  background: var(--apricot);
  padding: 18px 15px;
  transform: rotate(7deg);
  font:
    16px "Letter Note",
    serif;
  box-shadow: 0 10px 20px var(--warm-shadow);
}
.auth-orbit {
  position: absolute;
  right: 30px;
  top: 0;
  color: var(--orange);
  font-size: 28px;
  animation: auth-twinkle 4s ease-in-out infinite;
}
.auth-story-foot {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
  font: 11px/1.5 var(--letter-ui);
  letter-spacing: 0.03em;
  color: var(--ink-soft);
  margin-top: 22px;
}
.auth-card {
  position: relative;
  background: rgba(255, 250, 241, 0.9);
  padding: clamp(27px, 4vw, 46px);
  border: 1px solid var(--paper-edge);
  border-radius: 32px 32px 10px 32px;
  box-shadow: 0 20px 70px var(--warm-shadow);
  animation: mail-rise 0.8s cubic-bezier(0.2, 0.65, 0.2, 1) both;
  overflow: hidden;
}
.auth-card::before {
  content: "";
  display: block;
  height: 6px;
  background: repeating-linear-gradient(
    120deg,
    var(--kraft-light) 0 16px,
    transparent 16px 32px,
    var(--peach) 32px 48px,
    transparent 48px 64px
  );
  position: absolute;
  inset: 0 0 auto;
  opacity: 0.75;
}
.auth-card h2 {
  font: 27px/1.5 var(--letter-serif);
  font-weight: 500;
  margin: 14px 0 10px;
  max-width: 280px;
}
.auth-subtitle {
  font-size: 13px;
  color: var(--ink-soft);
  line-height: 1.8;
  margin-bottom: 26px;
}
.auth-stamp {
  position: absolute;
  right: 22px;
  top: 23px;
  width: 45px;
  height: 49px;
  border: 1px dashed var(--kraft);
  padding-top: 5px;
  text-align: center;
  transform: rotate(10deg);
  font: 11px/1.6 var(--letter-ui);
  color: var(--kraft-deep);
}
.auth-tabs {
  display: flex;
  border: 1px solid var(--paper-edge);
  padding: 4px;
  border-radius: 16px;
  background: var(--cream);
  margin-bottom: 26px;
  gap: 4px;
}
.auth-tabs button {
  width: 50%;
  border: 0;
  padding: 12px 8px;
  border-radius: 12px;
  background: none;
  color: var(--ink-soft);
  font: 14px var(--letter-ui);
  cursor: pointer;
  transition:
    background 0.3s,
    box-shadow 0.3s;
}
.auth-tabs button[aria-selected="true"] {
  background: var(--ivory);
  box-shadow: 0 3px 14px var(--warm-shadow);
  color: var(--ink);
}
.auth-card .form-stack {
  gap: 17px;
}
.auth-card .form-label {
  font-size: 12px;
  gap: 9px;
}
.auth-card .form-field {
  font: 14px var(--letter-ui);
  padding: 14px 15px;
  border-radius: 12px;
  min-height: 48px;
  background: var(--ivory);
}
.auth-card .form-submit {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-radius: 13px;
  font: 14px var(--letter-ui);
  padding: 17px 19px;
  min-height: 52px;
}
.auth-card .form-status {
  min-height: 23px;
  margin: 0;
  font-size: 12px;
}
.auth-card .form-field[aria-invalid="true"] {
  border-color: #b8573b;
}
.field-hint {
  font: 11px/1.8 var(--letter-ui);
  color: var(--ink-soft);
  margin: -9px 0 0;
}
.check-label {
  display: flex;
  align-items: center;
  gap: 8px;
  font: 12px var(--letter-ui);
  color: var(--ink-soft);
}
.check-label input {
  accent-color: var(--orange);
}
.auth-bottom-note {
  text-align: center;
  font-size: 11px;
  color: var(--ink-soft);
  margin: 26px 0 0;
  line-height: 1.8;
}
html[data-theme="warm"] {
  --cream: #f5e4bc;
  --apricot: #ecd2a1;
  --ivory: #fff0c8;
  --ink: #67492f;
  --ink-soft: #81613d;
  --peach: #e7c08e;
}
html[data-theme="warm"] body {
  background: #f5e4bc;
}
html[data-theme="warm"] .letter-paper[data-paper="plain"],
html[data-theme="warm"] .preview-paper[data-paper="plain"] {
  background: #fff0c8;
}
html[data-theme="night"] {
  color-scheme: dark;
  --cream: #2b2522;
  --apricot: #46372c;
  --peach: #654632;
  --ivory: #382e27;
  --ink: #efdac3;
  --ink-soft: #c4ac96;
  --orange: #dfa379;
  --kraft: #aa7d5c;
  --kraft-light: #74563e;
  --kraft-deep: #b88a68;
  --paper-edge: rgba(229, 195, 163, 0.2);
  --warm-shadow: rgba(0, 0, 0, 0.22);
}
html[data-theme="night"] body {
  background: #2b2522;
}
html[data-theme="night"] body::before,
html[data-theme="night"] body::after {
  opacity: 0.12;
}
html[data-theme="night"] .letter-paper,
html[data-theme="night"] .preview-paper,
html[data-theme="night"] .content-card,
html[data-theme="night"] .free-board,
html[data-theme="night"] .sticky-note,
html[data-theme="night"] .reply-note,
html[data-theme="night"] .sticky-dialog {
  background-color: var(--ivory);
  color: var(--ink);
  border-color: var(--paper-edge);
}
html[data-theme="night"] .letter-paper .kami-letter,
html[data-theme="night"] .preview-paper .kami-letter {
  color: var(--ink);
}
html[data-theme="night"] .letter-paper[data-paper="ruled"] {
  background-image: repeating-linear-gradient(
    to bottom,
    transparent 0,
    transparent 34px,
    rgba(229, 195, 163, 0.12) 35px,
    transparent 36px
  );
}
html[data-theme="night"] .letter-paper[data-paper="kraft"] {
  background-color: #4c3b2c;
}
html[data-theme="night"] .form-field,
html[data-theme="night"] .view-nav {
  background: var(--ivory);
  color: var(--ink);
}
html[data-theme="night"] .tag-pill {
  background: var(--apricot);
}
@keyframes mail-rise {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}
@keyframes auth-float {
  0%,
  100% {
    transform: translateY(0) rotate(-7deg);
  }
  50% {
    transform: translateY(-9px) rotate(-4deg);
  }
}
@keyframes auth-twinkle {
  50% {
    transform: rotate(15deg) scale(0.9);
    opacity: 0.6;
  }
}
@media (max-width: 900px) {
  .account-bar {
    flex-wrap: wrap;
    gap: 10px;
  }
  .theme-modes {
    margin-left: auto;
  }
  .auth-layout {
    gap: 35px;
    padding: 30px 24px;
  }
  .auth-story h1 {
    font-size: 32px;
  }
  .auth-card h2 {
    font-size: 24px;
  }
  .auth-story-foot {
    gap: 10px;
  }
  .auth-still-life {
    transform: scale(0.85);
    transform-origin: left center;
    width: 350px;
  }
  .account-name {
    display: none;
  }
}
@media (max-width: 700px) {
  .auth-layout {
    grid-template-columns: 1fr;
    max-width: 540px;
    padding: 24px 20px 38px;
    gap: 24px;
  }
  .auth-story {
    padding: 0;
  }
  .auth-brand {
    margin-bottom: 22px;
  }
  .auth-story h1 {
    font-size: 29px;
    line-height: 1.5;
    margin-bottom: 12px;
  }
  .auth-intro {
    font-size: 14px;
  }
  .auth-still-life {
    position: absolute;
    right: -25px;
    top: 85px;
    transform: scale(0.46);
    transform-origin: right top;
    opacity: 0.85;
    pointer-events: none;
  }
  .auth-story-foot {
    margin-top: 22px;
    font-size: 10px;
    gap: 14px;
  }
  .auth-story .view-kicker {
    font-size: 10px;
  }
  .auth-intro {
    max-width: 230px;
  }
  .auth-card {
    padding: 30px 25px;
    border-radius: 25px;
  }
  .auth-card h2 {
    font-size: 24px;
  }
  .auth-story {
    overflow: hidden;
    min-height: 275px;
  }
  .account-bar {
    margin-bottom: 15px;
  }
  .mail-brand {
    font-size: 14px;
  }
  .account-actions {
    gap: 10px;
    font-size: 11px;
  }
  .theme-modes {
    margin: 0;
  }
  .account-bar .theme-modes {
    width: 100%;
    justify-content: center;
  }
  .theme-button {
    flex: 1;
  }
  .view-nav .view-tab {
    font-size: 10px;
    padding: 10px 8px;
  }
  .compose-options {
    grid-template-columns: 1fr;
  }
  .compose-wide {
    grid-column: auto;
  }
  .sticker-picker {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
  .draft-grid,
  .inbox-grid {
    grid-template-columns: 1fr;
    gap: 25px;
  }
  .draft-card,
  .inbox-card {
    padding: 23px;
  }
  .timeline-grid {
    padding-left: 20px;
  }
  .timeline-grid .letter-card {
    padding: 20px;
  }
  .timeline-grid .letter-card::before {
    left: -26px;
  }
  .timeline-trigger h2 {
    font-size: 22px;
  }
  .collection-advanced {
    gap: 10px;
  }
  .collection-advanced > label {
    min-width: calc(50% - 10px);
  }
  .letter-features {
    gap: 10px;
  }
  .mini-label {
    flex: 1;
    min-width: 75px;
  }
  .export-actions {
    width: 100%;
  }
  .paper-cat {
    right: 17px;
    width: 60px;
    height: 60px;
  }
  .draft-actions .soft-button {
    flex: 1;
  }
  .library-page {
    padding-top: 24px;
  }
  .auth-stamp {
    right: 18px;
    top: 22px;
    width: 37px;
    font-size: 10px;
  }
  .auth-card h2 {
    max-width: 235px;
  }
}
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation: none !important;
    transition: none !important;
    scroll-behavior: auto !important;
  }
}
@media print {
  .account-bar,
  .letter-features,
  .mail-toast {
    display: none !important;
  }
  .letter-paper .kami-letter {
    color: #684b38 !important;
  }
  .letter-paper {
    box-shadow: none;
  }
  .paper-cat {
    position: absolute;
  }
}

.collection-advanced .form-field {
  width: 100%;
  min-width: 0;
  max-width: 100%;
}
.collection-filter-panel {
  border: 1px dashed var(--paper-edge);
  border-radius: 16px;
  padding: 14px 18px;
  margin: 18px 0;
  background: rgba(255, 250, 241, 0.25);
}
.collection-filter-panel summary {
  cursor: pointer;
  font: 13px/1.6 var(--letter-ui);
  color: var(--ink-soft);
}
.collection-filter-panel .collection-advanced {
  margin-bottom: 4px;
}
.library-page > .view-switch {
  width: max-content;
  margin: 18px 0;
}
.auth-card .form-submit {
  width: 100%;
}
.auth-title-line {
  display: inline;
}
@media (max-width: 700px) {
  .auth-title-line {
    display: block;
  }
  .auth-card h2 {
    max-width: 100%;
  }
  .library-tools {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .library-tools > .form-label:first-child {
    grid-column: 1/-1;
  }
}
@media (max-width: 400px) {
  .collection-advanced > label {
    flex-basis: 100%;
    min-width: 0;
  }
  .collection-advanced .form-field {
    min-width: 0;
  }
}
@media (max-width: 370px) {
  .auth-still-life {
    opacity: 0.24;
    right: -45px;
    top: 110px;
    transform: scale(0.37);
  }
  .auth-story h1 {
    font-size: 26px;
    position: relative;
    z-index: 1;
  }
  .auth-card {
    padding: 28px 22px;
  }
  .auth-story-foot {
    gap: 7px;
  }
}

.auth-card [role="tabpanel"] {
  animation: mail-rise 0.35s cubic-bezier(0.2, 0.65, 0.2, 1) both;
}
.cat-choice:hover {
  transform: translateY(-3px) rotate(2deg);
}

/* Form rhythm: one baseline, one control size, no native fieldset outline. */
.compose-options-title { grid-column: 1/-1; margin: 0 0 4px; font: 600 15px/1.6 var(--letter-ui); color: var(--ink); }
.form-label { min-width: 0; line-height: 1.5; }
.compose-card input[type="datetime-local"] { height: 50px; min-height: 50px; font: 400 16px/normal var(--letter-ui); }
input[type="date"], input[type="datetime-local"] { appearance: none; -webkit-appearance: none; }
input::-webkit-date-and-time-value { text-align: left; }
.compose-card .form-submit { min-height: 50px; }
.collection-advanced { gap: 16px; }
.collection-advanced > label { min-width: 0; }
.reply-search-tools { display: grid; grid-template-columns: minmax(0,1.45fr) repeat(2,minmax(0,1fr)) auto; align-items: end; }
.reply-search-tools > .text-link { display: inline-flex; align-items: center; justify-content: center; height: 50px; padding: 0 8px; white-space: nowrap; }
.content-card:hover { transform: none; }
.compose-card { min-width: 0; }
.compose-options > *, .form-stack > * { min-width: 0; }
.compose-preview .preview-paper { contain: layout style; }
@media (max-width:960px) { .compose-preview .preview-paper { max-height: 70svh; } }
@media (max-width:700px) {
  .compose-options { grid-template-columns: repeat(3,minmax(0,1fr)); gap: 18px 10px; padding: 16px 0; }
  .compose-options-title, .compose-wide { grid-column: 1/-1; }
  .compose-options select { padding-inline: 8px; font-size: 16px; }
  .reply-search-tools { grid-template-columns: repeat(2,minmax(0,1fr)); gap: 14px 12px; }
  .reply-search-tools > label:first-child { grid-column: 1/-1; }
  .reply-search-tools > .text-link { grid-column: 1/-1; justify-self: end; height: 36px; }
  .sticker-picker { grid-template-columns: repeat(4,minmax(0,1fr)); gap: 10px; }
  .draft-actions { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); }
  .draft-actions .soft-button { justify-content: center; min-height: 44px; text-align: center; }
  .compose-card { padding: 24px 18px; }
}
@media (max-width:360px) { .compose-options { grid-template-columns: 1fr; } }

.compose-card .photo-preview-frame:has(#composePreview[hidden]) .photo-preview-surface { aspect-ratio: auto; height: 110px; }
@media (min-width:961px) { .compose-card h2 { margin-bottom: 4px; } }
@media (max-width:700px) {
  .account-bar { display: grid; grid-template-columns: minmax(0,1fr); }
  .account-actions { justify-content: space-between; gap: 8px; flex-wrap: wrap; }
  .account-bar .theme-modes { width: 100%; margin: 0; }
  .intro-replay { padding-left: 0; }
}

.reply-tools { display: grid; grid-template-columns: minmax(0,1.2fr) minmax(0,1fr); gap: 10px 14px; }
.reply-tools > .form-label, .reply-tools > .form-status, .reply-tools > .pagination { grid-column: 1/-1; margin-block: 0; }
.reply-tools > .pagination { margin-top: 8px; }
@media (max-width:700px) { .reply-tools { grid-template-columns: minmax(0,1fr); gap: 12px; } }

/* First-letter opening: no per-frame expansion of the full document height. */
.scene .letter-shell { display: none; opacity: 1; transition: none; }
.scene.is-unsealing .envelope-button { overflow: visible; }
.scene.is-unsealing .envelope-flap { transform: rotateX(175deg); transition: transform 560ms cubic-bezier(.22,.72,.2,1); }
.scene.is-unsealing .seal { opacity: 0; transform: scale(.8); }
.scene.is-open .letter-shell { display: block; margin: 0 auto; }
.scene.is-open .letter-paper { opacity: 1; transform: none; transition: none; animation: showcase-paper-reveal 420ms ease both; }
.scene.is-open .letter-copy > * { animation: none; }
.scene.is-open .envelope-wrap, .scene.is-open .open-hint { display: none; }
@keyframes showcase-paper-reveal { from { opacity: 0; transform: translateY(16px); } to { opacity: 1; transform: none; } }
@media (prefers-reduced-motion:reduce) { .scene.is-open .letter-paper { animation: none; } }
@media print { .scene .letter-shell { display: block; } }