:root {
  --bg: #04060b;
  --ink: #f2f7fd;
  --dim: #9aa9bb;
  --faint: #8594a7;
  --line: rgba(242, 247, 253, 0.12);
  --line-soft: rgba(242, 247, 253, 0.06);
  --green: #557a63;
}

* { box-sizing: border-box; }

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

body {
  background: var(--bg);
  color: var(--ink);
  font-family: 'Noto Serif SC Variable', 'Noto Serif SC', 'Songti SC', 'STSong', serif;
  font-size: 14px;
  line-height: 1.9;
  letter-spacing: 0.02em;
  -webkit-font-smoothing: antialiased;
}

button, input, textarea {
  font-family: inherit;
  letter-spacing: inherit;
}

button { color: inherit; }

:focus-visible {
  outline: 1px solid rgba(242, 247, 253, 0.45);
  outline-offset: 6px;
}

/* ---------- 顶栏 ---------- */

.top {
  display: flex;
  align-items: baseline;
  gap: 24px;
  padding: 26px clamp(20px, 4vw, 44px);
  border-bottom: 1px solid var(--line-soft);
}

.brand {
  font-size: 13px;
  letter-spacing: 0.16em;
}

.brand-sub { color: var(--faint); }

.modes {
  display: flex;
  align-items: baseline;
  gap: 30px;
}

.modes button,
.kinds button,
.filters button {
  padding: 0 0 2px;
  border: 0;
  background: none;
  color: var(--faint);
  font-size: 12px;
  letter-spacing: 0.2em;
  cursor: pointer;
  transition: color 0.24s ease;
}

.modes button:hover,
.kinds button:hover,
.filters button:hover { color: var(--dim); }

.modes button.is-on,
.kinds button.is-on,
.filters button.is-on { color: var(--ink); }

.quit {
  margin-left: auto;
  padding: 0;
  border: 0;
  background: none;
  color: var(--faint);
  font-size: 11px;
  letter-spacing: 0.18em;
  cursor: pointer;
}

.quit:hover { color: var(--ink); }

/* ---------- 管理 ---------- */

.manage {
  max-width: 1000px;
  margin: 0 auto;
  padding: 46px clamp(20px, 4vw, 44px) 120px;
}

.stats {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 28px;
  margin: 0;
  padding-bottom: 26px;
  border-bottom: 1px solid var(--line-soft);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--dim);
}

.stat b {
  font-weight: 400;
  color: var(--faint);
  margin-right: 7px;
}

.block { margin-top: 54px; }

.block-h {
  display: flex;
  align-items: baseline;
  gap: 14px;
  margin: 0 0 4px;
  font-size: 11px;
  font-weight: 400;
  letter-spacing: 0.24em;
  color: var(--faint);
}

.block-n { letter-spacing: 0.06em; }

.filters {
  display: flex;
  gap: 20px;
  margin-left: auto;
}

.block-link {
  margin-left: auto;
  padding: 0 0 2px;
  border: 0;
  border-bottom: 1px solid var(--green);
  background: none;
  color: var(--dim);
  font-size: 11px;
  letter-spacing: 0.16em;
  cursor: pointer;
}

.block-link:hover { color: var(--ink); }

/* 来信 */

.letter {
  padding: 20px 0 18px;
  border-bottom: 1px solid var(--line-soft);
}

.letter-meta {
  display: flex;
  align-items: baseline;
  gap: 14px;
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--faint);
}

.letter-act {
  display: flex;
  gap: 16px;
  margin-left: auto;
}

.letter-act button,
.row-actions button.link {
  padding: 0 0 2px;
  border: 0;
  background: none;
  color: var(--faint);
  font-size: 11px;
  letter-spacing: 0.14em;
  cursor: pointer;
}

.letter-act button:hover { color: var(--ink); }

.letter-text {
  margin: 10px 0 0;
  font-size: 14px;
  line-height: 1.95;
  color: var(--dim);
  white-space: pre-wrap;
}

.letter-edit {
  display: block;
  width: 100%;
  margin-top: 10px;
  padding: 6px 0;
  border: 0;
  border-bottom: 1px solid var(--line);
  background: none;
  color: var(--ink);
  font-size: 14px;
  line-height: 1.95;
  resize: vertical;
  outline: none;
}

.row-actions {
  display: flex;
  align-items: baseline;
  gap: 20px;
  margin-top: 14px;
}

.empty {
  margin: 18px 0 0;
  font-size: 12px;
  color: var(--faint);
}

/* 文字索引 */

.row {
  display: flex;
  align-items: baseline;
  gap: 18px;
  width: 100%;
  padding: 14px 0;
  border: 0;
  border-bottom: 1px solid var(--line-soft);
  background: none;
  text-align: left;
  cursor: pointer;
}

.row-date {
  flex: 0 0 86px;
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--faint);
}

.row-kind {
  flex: 0 0 32px;
  font-size: 11px;
  color: var(--faint);
  opacity: 0.65;
}

.row-title {
  flex: 1;
  min-width: 0;
  font-size: 14px;
  color: var(--dim);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  transition: color 0.24s ease;
}

.row:hover .row-title { color: var(--ink); }

/* 关于我 */

.about-edit textarea {
  display: block;
  width: 100%;
  margin-top: 16px;
  padding: 0;
  border: 0;
  background: none;
  color: var(--ink);
  font-size: 14px;
  line-height: 2;
  resize: vertical;
  outline: none;
}

.status {
  margin: 70px 0 0;
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--faint);
  opacity: 0.75;
}

/* ---------- 写字 ---------- */

.write {
  display: flex;
  flex-direction: column;
  min-height: calc(100vh - 92px);
  max-width: 860px;
  margin: 0 auto;
  padding: 44px clamp(20px, 4vw, 44px) 34px;
}

.write-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 20px;
}

.kinds {
  display: flex;
  gap: 24px;
}

.write-target {
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--faint);
}

.draftbar {
  display: flex;
  align-items: baseline;
  gap: 16px;
  margin-top: 22px;
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--faint);
}

.draftbar button {
  padding: 0 0 2px;
  border: 0;
  border-bottom: 1px solid var(--line);
  background: none;
  color: var(--dim);
  font-size: 11px;
  cursor: pointer;
}

.write-title {
  width: 100%;
  margin: 28px 0 0;
  padding: 0 0 12px;
  border: 0;
  border-bottom: 1px solid var(--line-soft);
  background: none;
  color: var(--ink);
  font-size: 20px;
  letter-spacing: 0.08em;
  outline: none;
}

.write-body {
  flex: 1;
  width: 100%;
  min-height: 44vh;
  margin-top: 26px;
  padding: 0;
  border: 0;
  background: none;
  color: var(--ink);
  font-size: 15px;
  line-height: 2.1;
  resize: none;
  outline: none;
}

.write-title::placeholder,
.write-body::placeholder,
input::placeholder {
  color: var(--faint);
  opacity: 0.6;
}

.write-foot {
  display: flex;
  align-items: baseline;
  gap: 22px;
  padding-top: 18px;
  border-top: 1px solid var(--line-soft);
}

.btn {
  padding: 0 0 3px;
  border: 0;
  border-bottom: 1px solid var(--green);
  background: none;
  color: var(--ink);
  font-size: 11px;
  letter-spacing: 0.18em;
  cursor: pointer;
}

.btn:disabled { opacity: 0.35; cursor: default; }

.btn-quiet {
  border-bottom-color: transparent;
  color: var(--faint);
}

.btn-quiet:hover { color: var(--dim); }

.btn-danger:hover { color: #cb9090; }

.foot-msg {
  font-size: 11px;
  color: var(--dim);
}

.foot-right {
  display: flex;
  gap: 18px;
  margin-left: auto;
  font-size: 11px;
  color: var(--faint);
}

/* ---------- 门 ---------- */

.gate {
  max-width: 360px;
  margin: 20vh auto 0;
  padding: 0 clamp(20px, 4vw, 44px);
}

.gate-word {
  margin: 0 0 44px;
  font-size: 20px;
  letter-spacing: 0.6em;
  color: var(--faint);
}

.gate-form input {
  display: block;
  width: 100%;
  margin-bottom: 22px;
  padding: 6px 0;
  border: 0;
  border-bottom: 1px solid var(--line);
  background: none;
  color: var(--ink);
  font-size: 14px;
  outline: none;
}

.gate-form button {
  margin-top: 6px;
  padding: 0 0 3px;
  border: 0;
  border-bottom: 1px solid var(--green);
  background: none;
  color: var(--ink);
  font-size: 11px;
  letter-spacing: 0.2em;
  cursor: pointer;
}

.gate-msg {
  margin-top: 18px;
  font-size: 11px;
  color: var(--faint);
  min-height: 18px;
}

/* ---------- 提示 ---------- */

.toast {
  position: fixed;
  left: 50%;
  bottom: 36px;
  transform: translateX(-50%);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--dim);
  pointer-events: none;
}

@media (max-width: 720px) {
  .top {
    padding: 18px 20px;
    gap: 14px;
  }

  .modes { gap: 22px; }

  .manage { padding: 32px 20px 90px; }

  .stats { gap: 8px 20px; font-size: 11px; }

  .block { margin-top: 42px; }

  .filters { gap: 13px; }

  .row-date { flex-basis: 68px; font-size: 10px; }

  .row-kind { flex-basis: 28px; font-size: 10px; }

  .row-title { font-size: 13px; }

  .write { padding: 30px 20px 24px; min-height: calc(100vh - 78px); }

  .write-title { font-size: 18px; margin-top: 22px; }

  .write-body { font-size: 14px; min-height: 40vh; }

  .write-foot { gap: 16px; }

  .foot-right { gap: 12px; }
}