/* 树洞：夜里的树洞，年轮在身后慢慢长。 */

:root {
  --bg: #1e2620;        /* 夜苔 */
  --bg-deep: #151b16;   /* 洞里 */
  --ink: #dad5c8;       /* 骨白 */
  --ink-2: #9aa196;     /* 地衣 */
  --ink-3: #6f7a6c;
  --line: #3a463b;      /* 年轮 */
  --lamp: #c8af74;      /* 萤火 */

  --serif: "Noto Serif SC", "Source Han Serif SC", "Source Han Serif CN", "Songti SC", "STSong", "SimSun", serif;
  --sans: "PingFang SC", "HarmonyOS Sans SC", "Noto Sans SC", "Microsoft YaHei UI", "Microsoft YaHei", system-ui, sans-serif;

  --measure: 33rem;
  color-scheme: dark;
}

@media (prefers-color-scheme: light) {
  :root {
    --bg: #e4e7df;      /* 晨雾 */
    --bg-deep: #d7dcd2;
    --ink: #262e28;
    --ink-2: #566159;
    --ink-3: #7c8678;
    --line: #b6bfb1;
    --lamp: #8a6a1f;
    color-scheme: light;
  }
}

*, *::before, *::after { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
  scrollbar-width: thin;
  scrollbar-color: var(--line) transparent;
}
body:has(dialog[open]) { overflow: hidden; }

body {
  margin: 0;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--serif);
  font-size: 1rem;
  line-height: 1.9;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

::selection { background: color-mix(in srgb, var(--lamp) 32%, transparent); }

:focus-visible {
  outline: 1px solid var(--lamp);
  outline-offset: 4px;
  border-radius: 2px;
}

.sr-only {
  position: absolute;
  width: 1px; height: 1px;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
}

button { font: inherit; color: inherit; }

/* 组件自己设了 display 时，[hidden] 也要真的隐藏 */
[hidden] { display: none !important; }

/* ---------- 年轮背景 ---------- */

.rings {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  pointer-events: none;
}
.rings path {
  fill: none;
  stroke: var(--line);
  stroke-width: 1;
  stroke-opacity: .55;
  vector-effect: non-scaling-stroke;
  transition: stroke .5s, stroke-opacity .5s;
}
.rings .hole { fill: url(#hollow); stroke-opacity: .9; }
.rings .month { stroke-opacity: .95; }
.rings .today { stroke: var(--lamp); stroke-opacity: .8; stroke-width: 1.25; }
.rings .hl { stroke: var(--lamp); stroke-opacity: 1; stroke-width: 2; }

/* ---------- 顶栏与页脚 ---------- */

.bar, .foot, .column { position: relative; z-index: 1; }

.bar {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  padding: 1.5rem 2rem;
}

.mark {
  font-size: 1rem;
  letter-spacing: .4em;
  color: var(--ink-2);
}

.link {
  background: none;
  border: 0;
  padding: .25rem 0;
  cursor: pointer;
  font-family: var(--sans);
  font-size: .875rem;
  letter-spacing: .08em;
  color: var(--ink-2);
  text-decoration: none;
  transition: color .2s;
}
.link:hover { color: var(--ink); }
.link.danger:hover { color: #c98a7a; }

.foot {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 1rem;
  padding: 1.5rem 2rem 1.75rem;
  font-family: var(--sans);
  font-size: .75rem;
  color: var(--ink-3);
}

.quiet {
  color: var(--ink-3);
  text-decoration: none;
  letter-spacing: .08em;
  transition: color .2s;
}
.quiet:hover { color: var(--ink-2); }

/* ---------- 正文列 ---------- */

.column {
  flex: 1;
  width: 100%;
  max-width: calc(var(--measure) + 3rem);
  margin: 0 auto;
  padding: 16vh 1.5rem 6rem;
}

.date {
  margin: 0;
  font-weight: 400;
  font-size: 1.75rem;
  line-height: 1.3;
  letter-spacing: .14em;
}
.date .weekday,
.when .weekday {
  margin-left: .9em;
  font-family: var(--sans);
  font-size: .8125rem;
  letter-spacing: .1em;
  color: var(--ink-3);
  vertical-align: .2em;
}

.summary {
  margin: .9rem 0 0;
  min-height: 1.9em;
  font-size: 1rem;
  color: var(--ink-2);
}
.summary.empty { color: var(--ink-3); }
.summary .link { margin-left: .75em; font-size: .8125rem; }

.pending::after {
  content: "……";
  display: inline-block;
  margin-left: .2em;
  animation: breathe 2.4s ease-in-out infinite;
}
@keyframes breathe {
  0%, 100% { opacity: .25; }
  50% { opacity: 1; }
}

/* ---------- 今天写下的 ---------- */

.thread {
  list-style: none;
  margin: 3rem 0 0;
  padding: 0;
}
.thread:empty { margin-top: 2rem; }

.me, .tree { position: relative; }
.me p, .tree p { margin: 0; white-space: pre-wrap; overflow-wrap: anywhere; }

.me {
  margin-bottom: 1.75rem;
  font-size: 1.125rem;
  line-height: 1.95;
}

.stamp {
  position: absolute;
  right: 100%;
  top: .6em;
  margin-right: 1.75rem;
  font-family: var(--sans);
  font-size: .75rem;
  line-height: 1;
  color: var(--ink-3);
  font-variant-numeric: tabular-nums;
  letter-spacing: .04em;
}

.tree {
  margin: -.75rem 0 2.25rem;
  padding-left: 1.75rem;
  font-family: var(--sans);
  font-size: .9375rem;
  line-height: 1.85;
  color: var(--ink-2);
}
.tree.error { color: var(--ink-3); font-size: .8125rem; }
.tree.error .link { font-size: .8125rem; color: var(--lamp); }

.thread .tree:not(.waiting) { animation: surface 1.2s ease-out; }
@keyframes surface { from { opacity: 0; } }

/* ---------- 输入 ---------- */

.composer { margin-top: 1rem; }

.composer textarea {
  display: block;
  width: 100%;
  min-height: 4.5em;
  max-height: 60vh;
  margin: 0;
  padding: .25rem 0 .9rem;
  resize: none;
  background: transparent;
  border: 0;
  border-bottom: 1px solid var(--line);
  border-radius: 0;
  color: var(--ink);
  caret-color: var(--lamp);
  font: inherit;
  font-size: 1.125rem;
  line-height: 1.95;
  transition: border-color .4s;
}
.composer textarea::placeholder { color: var(--ink-3); opacity: 1; }
.composer textarea:focus { outline: none; border-bottom-color: color-mix(in srgb, var(--lamp) 70%, var(--line)); }

.composer-row {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  margin-top: 1rem;
  font-family: var(--sans);
  font-size: .8125rem;
  color: var(--ink-2);
}

.toggle {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  cursor: pointer;
  letter-spacing: .04em;
}
.toggle input {
  width: .9rem; height: .9rem;
  margin: 0;
  accent-color: var(--lamp);
}

.hint {
  margin-left: auto;
  color: var(--ink-3);
  font-size: .75rem;
  letter-spacing: .04em;
}

.send {
  padding: .45rem 1.15rem;
  border: 1px solid color-mix(in srgb, var(--lamp) 45%, transparent);
  border-radius: 999px;
  background: transparent;
  color: var(--lamp);
  font-family: var(--sans);
  font-size: .875rem;
  letter-spacing: .12em;
  cursor: pointer;
  transition: background-color .25s, opacity .25s;
}
.send:hover:not(:disabled) { background: color-mix(in srgb, var(--lamp) 12%, transparent); }
.send:disabled { opacity: .35; cursor: default; }

/* ---------- 年轮抽屉 ---------- */

.drawer {
  position: fixed;
  inset: 0 0 0 auto;
  width: min(27rem, 100%);
  height: 100dvh;
  max-width: 100%;
  max-height: 100dvh;
  margin: 0;
  padding: 0;
  border: 0;
  border-left: 1px solid var(--line);
  background: var(--bg-deep);
  color: var(--ink);
}
.drawer[open] {
  display: flex;
  flex-direction: column;
  animation: slide-in .45s cubic-bezier(.2,.7,.2,1);
}
.drawer::backdrop {
  background: color-mix(in srgb, var(--bg-deep) 55%, transparent);
  animation: fade .45s ease-out;
}
@keyframes slide-in { from { transform: translateX(2.5rem); opacity: 0; } }
@keyframes fade { from { opacity: 0; } }

.drawer-head {
  display: flex;
  align-items: baseline;
  gap: 1rem;
  padding: 1.5rem 2rem 1rem;
}
.drawer-head h2 {
  margin: 0;
  font-weight: 400;
  font-size: 1.25rem;
  letter-spacing: .3em;
}
.count {
  font-family: var(--sans);
  font-size: .75rem;
  color: var(--ink-3);
}
.drawer-head .link { margin-left: auto; }

.days {
  flex: 1;
  overflow-y: auto;
  list-style: none;
  margin: 0;
  padding: .5rem 2rem 2rem;
  overscroll-behavior: contain;
  scrollbar-width: thin;
  scrollbar-color: var(--line) transparent;
}

.days .year {
  margin: 1.75rem 0 .25rem;
  font-family: var(--sans);
  font-size: .75rem;
  letter-spacing: .1em;
  color: var(--ink-3);
}
.days .none { padding: 2rem 0; color: var(--ink-3); font-size: .9375rem; }

.day + .day { border-top: 1px solid color-mix(in srgb, var(--line) 60%, transparent); }

.day-head {
  display: block;
  width: 100%;
  padding: 1rem 0;
  background: none;
  border: 0;
  text-align: left;
  cursor: pointer;
}
.when {
  display: block;
  font-size: 1rem;
  letter-spacing: .1em;
}
.gist {
  display: block;
  margin-top: .2rem;
  font-size: .9375rem;
  line-height: 1.75;
  color: var(--ink-2);
  transition: color .2s;
}
.day-head:hover .gist,
.day-head[aria-expanded="true"] .gist { color: var(--ink); }

.day-body {
  list-style: none;
  margin: 0;
  padding: .25rem 0 1.25rem;
}
.day-body .me { font-size: 1rem; margin-bottom: 1.1rem; }
.day-body .stamp { position: static; display: block; margin: 0 0 .35rem; }
.day-body .tree { margin: -.4rem 0 1.25rem; padding-left: 1.25rem; font-size: .875rem; }

.drawer-foot {
  padding: 1.25rem 2rem 1.5rem;
  border-top: 1px solid color-mix(in srgb, var(--line) 60%, transparent);
}
.drawer-foot .note {
  margin: 0;
  font-family: var(--sans);
  font-size: .75rem;
  line-height: 1.7;
  color: var(--ink-3);
}
.drawer-foot .note:empty { display: none; }
.actions { display: flex; gap: 1.5rem; margin: .75rem 0 .25rem; }
.actions .link { font-size: .8125rem; }

/* ---------- 随便聊聊 ---------- */

.page-chat .column { padding-top: 10vh; }
.page-chat .thread { margin-top: 0; }
.page-chat .intro {
  margin: 0 0 2.5rem;
  font-family: var(--sans);
  font-size: .8125rem;
  color: var(--ink-3);
}
.page-chat .tree { margin-top: -.5rem; padding-left: 0; font-size: 1rem; color: var(--ink); opacity: .82; }
.page-chat .bar nav { display: flex; gap: 1.75rem; }

/* ---------- 窄屏 ---------- */

@media (max-width: 52rem) {
  .stamp { position: static; display: block; margin: 0 0 .4rem; }
}

@media (max-width: 34rem) {
  .bar { padding: 1.1rem 1.25rem; }
  .foot { padding: 1.25rem; flex-direction: column; gap: .25rem; }
  .column { padding: 11vh 1.25rem 4rem; }
  .date { font-size: 1.5rem; }
  .hint { display: none; }
  .send { margin-left: auto; }
  .drawer { border-left: 0; }
  .drawer-head, .days, .drawer-foot { padding-left: 1.25rem; padding-right: 1.25rem; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
}

/* ---------- 账号 ---------- */

.who {
  display: inline-flex;
  align-items: baseline;
  gap: .9rem;
  letter-spacing: .04em;
}
.who .link { font-size: .75rem; color: var(--ink-3); }
.who .link:hover { color: var(--ink-2); }
.page-chat .intro span { margin-left: .25em; color: var(--ink-2); }

.account { margin-top: 3rem; }

.field {
  display: block;
  margin-bottom: 1.75rem;
}
.field span {
  display: block;
  margin-bottom: .25rem;
  font-family: var(--sans);
  font-size: .75rem;
  letter-spacing: .1em;
  color: var(--ink-3);
}
.field input {
  display: block;
  width: 100%;
  margin: 0;
  padding: .2rem 0 .6rem;
  background: transparent;
  border: 0;
  border-bottom: 1px solid var(--line);
  border-radius: 0;
  color: var(--ink);
  caret-color: var(--lamp);
  font: inherit;
  font-size: 1.125rem;
  transition: border-color .4s;
}
.field input:focus { outline: none; border-bottom-color: color-mix(in srgb, var(--lamp) 70%, var(--line)); }

.form-note {
  min-height: 1.6em;
  margin: -.5rem 0 0;
  font-family: var(--sans);
  font-size: .8125rem;
  color: #c98a7a;
}
.page-login .composer-row .send { margin-left: auto; }

/* ---------- 管理 ---------- */

.page-admin .bar nav { display: flex; gap: 1.75rem; }
.page-admin .column { position: relative; z-index: 1; }

.wide {
  position: relative;
  z-index: 1;
  flex: 1;
  width: 100%;
  max-width: 66rem;
  margin: 0 auto;
  padding: 2rem 2rem 5rem;
  font-family: var(--sans);
  font-size: .875rem;
  line-height: 1.7;
}
.wide section { margin-top: 3.25rem; }

.privacy {
  margin: 0;
  padding: .9rem 1.1rem;
  border-left: 2px solid color-mix(in srgb, var(--lamp) 55%, transparent);
  background: color-mix(in srgb, var(--bg-deep) 70%, transparent);
  color: var(--ink-2);
}

.sec-head {
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: .5rem 1.25rem;
  margin-bottom: 1.25rem;
}
.sec-head h2 {
  margin: 0;
  font-family: var(--serif);
  font-weight: 400;
  font-size: 1.25rem;
  letter-spacing: .25em;
  color: var(--ink);
}
.sec-head .search { margin: 0 0 0 auto; min-width: 12rem; }

.muted { color: var(--ink-3); }
.mono { font-family: ui-monospace, "SFMono-Regular", Consolas, monospace; letter-spacing: .03em; }
.num { font-variant-numeric: tabular-nums; }

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(11.5rem, 1fr));
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
  margin-bottom: 1.5rem;
}
.card {
  display: flex;
  flex-direction: column;
  gap: .15rem;
  padding: 1rem 1.1rem;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.card-label { font-size: .75rem; letter-spacing: .1em; color: var(--ink-3); }
.card-value { font-family: var(--serif); font-size: 1.6rem; line-height: 1.3; color: var(--ink); font-variant-numeric: tabular-nums; }
.card-sub { font-size: .75rem; color: var(--ink-2); }
.card.warn .card-value { color: #c98a7a; }

.table-wrap { overflow-x: auto; }
.grid { width: 100%; border-collapse: collapse; white-space: nowrap; }
.grid th, .grid td { padding: .55rem .9rem .55rem 0; text-align: left; vertical-align: baseline; }
.grid th {
  font-weight: 400;
  font-size: .75rem;
  letter-spacing: .08em;
  color: var(--ink-3);
  border-bottom: 1px solid var(--line);
}
.grid td { border-bottom: 1px solid color-mix(in srgb, var(--line) 50%, transparent); color: var(--ink-2); }
.grid td:first-child { color: var(--ink); }
.grid tr.off td { opacity: .55; }
.grid .actions-cell { display: flex; gap: 1rem; }
.tag {
  margin-left: .5rem;
  padding: 0 .4rem;
  border: 1px solid color-mix(in srgb, var(--lamp) 45%, transparent);
  border-radius: 999px;
  font-size: .6875rem;
  color: var(--lamp);
}

.wide .field { margin-bottom: 1.25rem; }
.wide .field input, .wide .field select { font-family: var(--sans); font-size: 1rem; }
.field select, select.action {
  width: 100%;
  padding: .2rem 0 .5rem;
  background: transparent;
  border: 0;
  border-bottom: 1px solid var(--line);
  color: var(--ink);
  font: inherit;
  cursor: pointer;
}
.field select option, select.action option { background: var(--bg-deep); color: var(--ink); }
select.action { width: auto; padding: .1rem 0; font-size: .8125rem; color: var(--ink-2); border-bottom-color: transparent; }
select.action:hover, select.action:focus { color: var(--ink); border-bottom-color: var(--line); }

.settings {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(14rem, 1fr));
  gap: 0 2rem;
}
.settings .composer-row { grid-column: 1 / -1; margin-top: 0; }
.settings .composer-row .send { margin-left: auto; }

.inline-form { display: flex; flex-wrap: wrap; align-items: flex-end; gap: 0 1.5rem; margin-bottom: 1rem; }
.inline-form .field { flex: 1 1 12rem; }
.inline-form .field.small { flex: 0 0 6rem; }
.inline-form .send { margin-bottom: 1.25rem; }

@media (max-width: 34rem) {
  .wide { padding: 1.25rem 1.25rem 4rem; }
  .sec-head .search { margin-left: 0; width: 100%; }
}