:root {
  --bg: #f4efe3; --paper: #fbf8f0; --surface: #fff; --ink: #23302a; --muted: #5c6b62;
  --faint: #8f9a8c; --green: #1d4a34; --green-deep: #143726; --green-soft: #e7ecdf;
  --amber: #d68b35; --border: #e3ddcd; --danger: #9a3b34; --danger-soft: #fbf4f3;
}
* { box-sizing: border-box; }
html, body { margin: 0; height: 100%; }
body { background: var(--bg); color: var(--ink); font-family: "Public Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif; line-height: 1.5; }
.boot { display: grid; place-items: center; height: 100vh; color: var(--muted); }
h1, h2, h3 { font-family: "Newsreader", Georgia, serif; font-weight: 500; color: var(--green-deep); margin: 0; }
button { font-family: inherit; cursor: pointer; border: none; }
input, textarea, select { font-family: inherit; font-size: 15px; }
a { color: var(--green); }

/* layout */
.topbar { display: flex; align-items: center; gap: 14px; padding: 14px 28px; border-bottom: 1px solid var(--border); background: var(--paper); position: sticky; top: 0; z-index: 10; }
.topbar .brand { display: flex; align-items: center; gap: 10px; font-family: "Newsreader", serif; font-size: 22px; line-height: 1; color: var(--green); }
.topbar .brand .mark { width: 32px; height: 32px; border-radius: 8px; display: block; }
.topbar .brand span { display: inline-flex; align-items: center; }
.topbar .spacer { flex: 1; }
.wrap { max-width: 1080px; margin: 0 auto; padding: 28px; }
.crumbs { display: flex; align-items: center; gap: 8px; color: var(--muted); font-size: 14px; margin-bottom: 18px; }
.crumbs a { cursor: pointer; text-decoration: none; }
.crumbs a:hover { text-decoration: underline; }

/* buttons */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; height: 42px; padding: 0 18px; border-radius: 10px; font-size: 15px; font-weight: 600; }
.btn.primary { background: var(--green); color: var(--bg); }
.btn.primary:hover { background: var(--green-deep); }
.btn.ghost { background: transparent; color: var(--green); border: 1.5px solid var(--border); }
.btn.ghost:hover { background: var(--green-soft); }
.btn.danger { background: transparent; color: var(--danger); border: 1.5px solid #d8b3b0; }
.btn.sm { height: 34px; padding: 0 12px; font-size: 14px; }
.btn:disabled { opacity: .5; cursor: default; }
.linkbtn { background: none; color: var(--green); font-weight: 600; font-size: 14px; padding: 4px; }
.iconbtn { background: none; color: var(--muted); font-size: 18px; width: 32px; height: 32px; border-radius: 8px; flex: none; }
.iconbtn:hover { background: var(--green-soft); color: var(--green); }

/* folders */
.folder { margin-bottom: 18px; }
.folder.dropzone { border-radius: 14px; padding: 4px; margin: 0 -4px 16px; transition: background .12s, box-shadow .12s; }
.folder.dropzone.dropactive { background: var(--green-soft); box-shadow: 0 0 0 2px var(--green) inset; }
.folder-head { display: flex; align-items: center; gap: 10px; padding: 4px 2px 8px; }
.folder-name { font-family: "Newsreader", serif; font-size: 20px; color: var(--green-deep); }
.folder-head .meta { flex: 1; }
.treerow { gap: 12px; cursor: grab; touch-action: pan-y; }
.treerow.dragsrc { opacity: .35; }
.treerow.liftready { touch-action: none; box-shadow: 0 0 0 2px var(--green) inset; border-radius: 12px; }
.dragghost { position: fixed !important; pointer-events: none; z-index: 300; opacity: .94; cursor: grabbing; margin: 0 !important; box-shadow: 0 16px 36px rgba(20,55,38,.32); }
.rolesel { padding: 7px 9px; border: 1px solid var(--border); border-radius: 8px; background: var(--surface); color: var(--ink); font-weight: 600; font-size: 13px; }

/* toast (replaces native alert) */
.toast { position: fixed; left: 50%; bottom: 28px; transform: translate(-50%, 16px); background: var(--green-deep); color: var(--bg); padding: 12px 20px; border-radius: 12px; font-weight: 600; font-size: 14px; box-shadow: 0 8px 26px rgba(20,55,38,.28); opacity: 0; pointer-events: none; transition: opacity .2s ease, transform .2s ease; z-index: 100; max-width: 90vw; text-align: center; }
.toast.show { opacity: 1; transform: translate(-50%, 0); }
.toast.error { background: var(--danger); color: #fff; }

/* cards / lists */
.card { background: var(--surface); border: 1px solid var(--border); border-radius: 14px; padding: 18px; }
.row { display: flex; align-items: center; gap: 14px; background: var(--surface); border: 1px solid var(--border); border-radius: 12px; padding: 14px; cursor: pointer; transition: border-color .12s; }
.row:hover { border-color: var(--green); }
.row .meta { color: var(--faint); font-size: 13px; }
.grid { display: grid; gap: 10px; }
.avatar { width: 44px; height: 44px; border-radius: 50%; display: grid; place-items: center; font-family: "Newsreader", serif; font-size: 18px; flex: none; overflow: hidden; }
.avatar img { width: 100%; height: 100%; object-fit: cover; }
.pill { font-size: 12px; font-weight: 600; padding: 3px 10px; border-radius: 999px; background: var(--green-soft); color: var(--green); }
.pill.amber { background: #f0d9b6; color: #8a5a18; }

/* forms */
.field { margin-bottom: 16px; }
.field label { display: block; font-size: 12px; font-weight: 700; letter-spacing: .06em; text-transform: uppercase; color: var(--muted); margin-bottom: 6px; }
.field input, .field textarea, .field select { width: 100%; padding: 11px 13px; border: 1px solid var(--border); border-radius: 10px; background: var(--surface); color: var(--ink); }
.field textarea { min-height: 84px; resize: vertical; }
.seg { display: flex; gap: 8px; }
.seg button { flex: 1; height: 40px; border: 1.5px solid var(--border); border-radius: 10px; background: var(--surface); color: var(--muted); font-weight: 600; }
.seg button.on { border-color: var(--green); background: var(--green-soft); color: var(--green-deep); }
.checkrow { display: flex; align-items: center; gap: 10px; }
.lead { color: var(--muted); }
.err { background: var(--danger-soft); border-left: 3px solid var(--danger); border-radius: 8px; padding: 10px 12px; color: var(--danger); font-size: 14px; margin: 12px 0; }
.muted { color: var(--muted); }
.center { text-align: center; }

/* auth */
.auth { max-width: 420px; margin: 8vh auto; padding: 28px; }
.auth .mark { width: 72px; height: 72px; border-radius: 18px; display: block; margin: 0 auto 18px; }
.auth h1 { text-align: center; font-size: 40px; }
.code { letter-spacing: .3em; text-transform: uppercase; text-align: center; font-weight: 700; font-size: 22px; }

/* modal */
.scrim { position: fixed; inset: 0; background: rgba(20,55,38,.45); display: grid; place-items: center; padding: 24px; z-index: 50; }
.modal { background: var(--bg); border-radius: 16px; padding: 24px; width: 100%; max-width: 480px; max-height: 86vh; overflow: auto; }
.modal h2 { margin-bottom: 14px; }
.actions { display: flex; justify-content: flex-end; gap: 10px; margin-top: 18px; }
.section-title { font-size: 12px; font-weight: 700; letter-spacing: .08em; text-transform: uppercase; color: var(--muted); margin: 22px 0 8px; }
.toolbar { display: flex; gap: 10px; align-items: center; margin-bottom: 16px; flex-wrap: wrap; }
.toolbar input.search { flex: 1; min-width: 180px; padding: 10px 13px; border: 1px solid var(--border); border-radius: 10px; }

/* tree view — a flex column that fills the (dynamic) viewport height, so the
   canvas fills whatever's left below the bars and Safari's toolbar never clips it. */
.treepage { display: flex; flex-direction: column; height: 100vh; height: 100dvh; }
.treepage .topbar { flex: none; position: static; }
.treescroll { flex: 1; min-height: 0; overflow: auto; }
.seg2 { display: inline-flex; border: 1px solid var(--border); border-radius: 10px; overflow: hidden; }
.seg2 button { padding: 8px 16px; background: var(--surface); color: var(--muted); font-weight: 600; font-size: 14px; white-space: nowrap; }
.seg2 button.on { background: var(--green); color: var(--bg); }
.treebar { flex: none; display: flex; align-items: center; gap: 14px; padding: 11px 24px; border-bottom: 1px solid var(--border); background: var(--paper); }
.tb-nav { flex: 1; display: flex; align-items: center; gap: 10px; min-width: 0; }
.tb-tabs { flex: none; }
.tb-actions { flex: none; display: flex; align-items: center; gap: 8px; }
.tb-actions .btn { white-space: nowrap; }
.tb-back { background: none; color: var(--green); font-family: "Newsreader", serif; font-size: 18px; font-weight: 600; padding: 4px 6px 4px 0; white-space: nowrap; }
.treebar .tname { font-family: "Newsreader", serif; font-size: 20px; color: var(--green-deep); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
/* phone-width tree bar: two rows — [back · name · Add · ⋯] then the tabs full-width */
.treebar.mobile { flex-direction: column; align-items: stretch; gap: 8px; padding: 8px 12px 10px; }
.treebar.mobile .tb-row { display: flex; align-items: center; gap: 8px; }
.treebar.mobile .tname { flex: 1; font-size: 17px; }
.treebar.mobile .tb-back { font-size: 26px; padding: 0 2px; line-height: 1; }
.treebar.mobile .tb-tabs { width: 100%; }
.treebar.mobile .seg2 button { flex: 1; }
.tb-menu { background: none; color: var(--muted); font-size: 24px; font-weight: 700; line-height: 1; width: 34px; height: 34px; flex: none; }
.treewrap { position: relative; flex: 1; min-height: 0; width: 100%; overflow: hidden; background-color: var(--paper); background-image: radial-gradient(var(--border) 1.1px, transparent 1.1px); background-size: 24px 24px; cursor: grab; touch-action: none; }
.treewrap.grabbing { cursor: grabbing; }
.treecanvas { position: absolute; left: 0; top: 0; transform-origin: 0 0; will-change: transform; }
.node { position: absolute; box-sizing: border-box; border-radius: 14px; padding: 8px 12px 8px 9px; display: flex; align-items: center; gap: 10px; box-shadow: 0 1px 3px rgba(20,55,38,.08); cursor: pointer; }
.node:hover { box-shadow: 0 3px 10px rgba(20,55,38,.14); }
.node .nm { font-family: "Newsreader", serif; font-size: 15px; color: var(--ink); line-height: 1.13; overflow-wrap: break-word; }
.node .yr { font-size: 11px; color: var(--faint); margin-top: 1px; }
.node .avatar { width: 42px !important; height: 42px !important; border-radius: 11px; flex: none; }
.node .avwrap { border-radius: 12px; line-height: 0; flex: none; }
.zoombar { position: absolute; right: 16px; bottom: calc(16px + env(safe-area-inset-bottom)); display: flex; gap: 6px; z-index: 5; }
.zoombar button { width: 40px; height: 40px; border-radius: 10px; border: 1px solid var(--border); background: var(--surface); font-size: 20px; font-weight: 700; color: var(--ink); box-shadow: 0 1px 4px rgba(20,55,38,.12); }
.zoombar button:hover { border-color: var(--green); color: var(--green); }
.legend { position: absolute; left: 16px; bottom: calc(16px + env(safe-area-inset-bottom)); z-index: 5; background: rgba(251,248,240,.95); border: 1px solid var(--border); border-radius: 12px; padding: 10px 14px; box-shadow: 0 2px 10px rgba(20,55,38,.1); display: flex; flex-direction: column; gap: 6px; max-width: 46vw; }
.legend .lg { display: flex; align-items: center; gap: 8px; font-size: 13px; font-weight: 600; color: var(--ink); }
.legend .sw { width: 13px; height: 13px; border-radius: 4px; flex: none; }

/* ---- phone-width polish ---- */
@media (max-width: 760px) {
  .topbar { padding: 12px 16px; }
  .topbar .brand { font-size: 20px; gap: 8px; }
  .topbar .brand .mark { width: 28px; height: 28px; }
  .wrap { padding: 20px 16px; }
  .auth { margin: 6vh auto; padding: 24px 20px; }
  .modal { padding: 20px; }
  .trees-head h1, .wrap h1 { font-size: 27px; }
  .node .nm { font-size: 14px; }
}