/* Copyright xkv.org 2026
   SPDX-License-Identifier: Apache-2.0 */
:root {
  --brand: #1F3A5F;
  --brand-deep: #172D4A;
  --accent: #0E7C86;
  --accent-strong: #0A646C;
  --accent-soft: #E7F3F4;
  --ink: #17212E;
  --text: #2A3544;
  --muted: #5F6B7A;
  --line: #DCE3EA;
  --line-soft: #EAEFF3;
  --soft: #F4F7FA;
  --white: #FFFFFF;
  --warn: #9A3B16;
  --warn-soft: #FBEEE8;
  --radius: 12px;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--soft); color: var(--text); font: 16px/1.55 var(--sans); }
code { font-family: var(--mono); font-size: .92em; background: var(--line-soft); padding: 1px 5px; border-radius: 5px; }
a { color: var(--accent-strong); }
.wrap { max-width: 1160px; margin: 0 auto; padding: 0 20px; }
.muted { color: var(--muted); }
.small { font-size: 14px; }

.appbar { background: var(--brand); color: var(--white); }
.appbar .wrap { display: flex; align-items: center; gap: 14px; height: 56px; }
.appbar .brand { color: var(--white); text-decoration: none; font-weight: 750; letter-spacing: .04em; font-size: 19px; }
.appbar .tag { font-size: 13px; padding: 3px 9px; border-radius: 99px; background: rgba(255,255,255,.14); }
.appbar .grow { flex: 1; }
.appbar .home { color: #CFE8EA; font-size: 15px; }

.noscript { background: var(--warn-soft); color: var(--warn); padding: 12px 16px; border-radius: var(--radius); }
.intro { padding: 30px 0 8px; max-width: 820px; }
.eyebrow { margin: 0 0 6px; color: var(--accent-strong); font-weight: 650; font-size: 14px; letter-spacing: .03em; }
.intro h1 { margin: 0 0 12px; color: var(--ink); font-size: 34px; line-height: 1.15; }
.lead { margin: 0 0 14px; font-size: 18px; }
.honest { margin: 0; padding: 10px 14px; background: var(--accent-soft); border-radius: 10px; font-size: 15px; }

.panel { background: var(--white); border: 1px solid var(--line); border-radius: var(--radius); padding: 18px 20px 20px; margin: 18px 0; }
.panel-head { display: flex; align-items: baseline; justify-content: space-between; gap: 12px; flex-wrap: wrap; margin-bottom: 12px; }
.panel h2 { margin: 0; font-size: 19px; color: var(--ink); }
.panel-head p { margin: 0; }

.stories { display: grid; grid-template-columns: repeat(4, 1fr); gap: 10px; }
.story { text-align: left; border: 1px solid var(--line); background: var(--soft); border-radius: 10px; padding: 12px 14px; cursor: pointer; font: inherit; color: var(--text); }
.story b { display: block; color: var(--ink); margin-bottom: 3px; }
.story span { font-size: 14px; color: var(--muted); }
.story:hover:not(:disabled) { border-color: var(--accent); }
.story.on { border-color: var(--accent); background: var(--accent-soft); box-shadow: inset 0 0 0 1px var(--accent); }
.story:disabled { opacity: .55; cursor: default; }

.grid { display: grid; grid-template-columns: minmax(260px, 340px) 1fr; gap: 18px; }
.grid .panel { margin: 0; }
.grid { margin: 18px 0; }

.keys { list-style: none; margin: 0; padding: 0; }
.keys li + li { margin-top: 6px; }
.keys button { width: 100%; display: flex; justify-content: space-between; align-items: baseline; gap: 10px; text-align: left; border: 1px solid var(--line-soft); background: var(--soft); border-radius: 8px; padding: 8px 10px; font: inherit; cursor: pointer; color: var(--text); }
.keys button:hover { border-color: var(--accent); }
.keys button.on { background: var(--accent-soft); border-color: var(--accent); }
.keys .k { font-family: var(--mono); font-size: 13.5px; color: var(--ink); overflow-wrap: anywhere; }
.keys .v { font-family: var(--mono); font-size: 13.5px; color: var(--accent-strong); font-weight: 650; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; max-width: 45%; }

.tabs { display: flex; gap: 4px; background: var(--soft); border-radius: 8px; padding: 3px; }
.tab { border: 0; background: transparent; padding: 4px 12px; border-radius: 6px; font: inherit; font-size: 14px; cursor: pointer; color: var(--muted); }
.tab.on { background: var(--white); color: var(--ink); box-shadow: 0 1px 2px rgba(0,0,0,.08); }
.question { margin: 0 0 12px; font-size: 17px; color: var(--ink); }
.question code { font-size: .9em; }

.tree ul { list-style: none; margin: 0; padding: 0 0 0 26px; position: relative; }
.tree > ul { padding-left: 0; }
.tree li { position: relative; margin-top: 10px; }
.tree ul ul > li::before { content: ""; position: absolute; left: -16px; top: -10px; bottom: 0; border-left: 2px solid var(--line); }
.tree ul ul > li:last-child::before { bottom: auto; height: 34px; }
.tree ul ul > li::after { content: ""; position: absolute; left: -16px; top: 24px; width: 12px; border-top: 2px solid var(--line); }
.node { border: 1px solid var(--line); border-radius: 10px; padding: 10px 12px; background: var(--white); transition: opacity .35s ease, transform .35s ease; }
.node.root { border-color: var(--accent); box-shadow: inset 3px 0 0 var(--accent); }
.node.yours { background: #FFFBEA; }
li.pending > .node { opacity: 0; transform: translateY(-6px); }
.node .head { display: flex; justify-content: space-between; gap: 10px; align-items: baseline; flex-wrap: wrap; }
.node .kv { font-family: var(--mono); font-size: 14px; color: var(--ink); overflow-wrap: anywhere; }
.node .kv b { color: var(--accent-strong); }
.node .rev { font-family: var(--mono); font-size: 12px; color: var(--muted); white-space: nowrap; }
.node .was { font-size: 14px; color: var(--muted); margin-top: 2px; }
.node .why { font-size: 15px; margin-top: 4px; }
.node .why .actor { font-weight: 650; color: var(--ink); }
.node .ref { font-family: var(--mono); font-size: 12.5px; background: var(--line-soft); padding: 1px 6px; border-radius: 5px; margin-left: 4px; }
.node .note { font-size: 13px; color: var(--muted); margin-top: 4px; font-style: italic; }
.node .del { color: var(--warn); font-weight: 650; }

.history { margin: 0; padding: 0; list-style: none; }
.history li { border: 1px solid var(--line-soft); border-radius: 8px; padding: 8px 10px; margin-top: 8px; font-size: 15px; }
.history .rev { font-family: var(--mono); font-size: 12px; color: var(--muted); }
.history .val { font-family: var(--mono); color: var(--accent-strong); font-weight: 650; }

.write { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px 14px; }
.write label { display: flex; flex-direction: column; gap: 4px; font-size: 14px; color: var(--ink); font-weight: 600; }
.write .wide { grid-column: 1 / -1; }
.write label.wide { grid-column: span 2; }
.write input { font: inherit; font-weight: 400; font-size: 15px; padding: 8px 10px; border: 1px solid var(--line); border-radius: 8px; color: var(--text); background: var(--white); min-width: 0; }
.write input:focus { outline: 2px solid var(--accent-soft); border-color: var(--accent); }
.causes { border: 1px solid var(--line-soft); border-radius: 8px; padding: 8px 12px 10px; margin: 0; }
.causes legend { font-size: 14px; font-weight: 600; color: var(--ink); padding: 0 4px; }
.cause-list { display: flex; flex-wrap: wrap; gap: 6px 14px; }
.cause-list label { flex-direction: row; align-items: center; gap: 6px; font-weight: 400; font-family: var(--mono); font-size: 13.5px; }
.actions { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; }
.btn { font: inherit; font-weight: 650; border: 1px solid var(--accent-strong); background: var(--accent); color: var(--white); padding: 9px 18px; border-radius: 8px; cursor: pointer; }
.btn:hover:not(:disabled) { background: var(--accent-strong); }
.btn:disabled { opacity: .5; cursor: default; }
.btn.ghost { background: var(--white); color: var(--accent-strong); }
.result { margin: 0; font-size: 15px; }
.result.err { color: var(--warn); }
.result.ok { color: var(--accent-strong); }
.foot { margin: 8px 0 40px; font-size: 15px; color: var(--muted); }

@media (max-width: 900px) {
  .stories { grid-template-columns: 1fr 1fr; }
  .grid { grid-template-columns: 1fr; }
  .write { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 560px) {
  .intro h1 { font-size: 28px; }
  .stories { grid-template-columns: 1fr; }
  .write { grid-template-columns: 1fr; }
  .write label.wide { grid-column: auto; }
  .panel { padding: 14px; }
  .tree ul { padding-left: 14px; }
  .tree ul ul > li::before, .tree ul ul > li::after { left: -9px; }
  .tree ul ul > li::after { width: 7px; }
}
@media (prefers-reduced-motion: reduce) {
  .node { transition: none; }
}