:root {
  --bg: #f6f6f3;
  --panel: #ffffff;
  --ink: #1b1d1f;
  --muted: #676d73;
  --line: #e2e2dc;
  --accent: #2f5bd3;
  --accent-ink: #ffffff;
  --online: #1f9d55;
  --warn: #b7791f;
  --danger: #c53030;
  --code-bg: #f1f1ec;
  --mine: #eef3ff;
  --radius: 10px;
  --mono: ui-monospace, "SF Mono", SFMono-Regular, Menlo, Consolas, monospace;
  --sans: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #111315;
    --panel: #181b1e;
    --ink: #e8e9ea;
    --muted: #9aa1a8;
    --line: #2a2e33;
    --accent: #7a9cff;
    --accent-ink: #0d1020;
    --online: #48c27d;
    --warn: #e0a645;
    --danger: #f07070;
    --code-bg: #1f2327;
    --mine: #1c2336;
    color-scheme: dark;
  }
}

* { box-sizing: border-box; }
html, body { margin: 0; background: var(--bg); color: var(--ink); font: 14px/1.45 var(--sans); }
button, input, select, textarea { font: inherit; color: inherit; }
code, pre, .mono { font-family: var(--mono); font-size: 12.5px; }
a { color: var(--accent); }
.boot { padding: 40px; color: var(--muted); }
.muted { color: var(--muted); }
.small { font-size: 12px; }
.hidden { display: none !important; }
.m0 { margin: 0; }
.mt6 { margin-top: 6px; }
.mt8 { margin-top: 8px; }
.mt14 { margin-top: 14px; }
label.me { margin: 0; gap: 6px; }

/* ---- controls ---- */
.btn {
  border: 1px solid var(--line); background: var(--panel); border-radius: 8px;
  padding: 6px 12px; cursor: pointer; white-space: nowrap;
}
.btn:hover { border-color: var(--muted); }
.btn.primary { background: var(--accent); color: var(--accent-ink); border-color: var(--accent); font-weight: 600; }
.btn.danger { color: var(--danger); }
.btn.small { padding: 2px 8px; font-size: 12px; }
.btn:disabled { opacity: .5; cursor: default; }
input[type=text], select, textarea {
  width: 100%; border: 1px solid var(--line); background: var(--bg); border-radius: 8px; padding: 7px 9px;
}
input:focus, select:focus, textarea:focus, .btn:focus-visible { outline: 2px solid var(--accent); outline-offset: 1px; }
label { display: block; font-size: 12px; color: var(--muted); margin: 10px 0 4px; }
.row { display: flex; gap: 8px; align-items: center; }
.row > * { flex: 1; }
.row > .btn { flex: 0; }

/* ---- landing ---- */
.landing { max-width: 520px; margin: 8vh auto; padding: 0 16px; }
.landing h1 { font-size: 28px; margin: 0 0 6px; letter-spacing: -0.02em; }
.landing .lead { color: var(--muted); margin: 0 0 24px; }
.card { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); padding: 18px; }
.card + .card { margin-top: 14px; }
.check { display: flex; gap: 8px; align-items: center; margin-top: 12px; color: var(--ink); font-size: 14px; }
.steps { color: var(--muted); padding-left: 18px; margin: 18px 0 0; }

/* ---- mailbox layout ---- */
.top {
  display: flex; gap: 14px; align-items: center; flex-wrap: wrap;
  padding: 10px 16px; border-bottom: 1px solid var(--line); background: var(--panel);
  position: sticky; top: 0; z-index: 5;
}
.top h1 { font-size: 16px; margin: 0; }
.top .id { color: var(--muted); }
.top .spacer { flex: 1; }
.badge { border: 1px solid var(--line); border-radius: 999px; padding: 1px 9px; font-size: 12px; color: var(--muted); }
.badge.admin { color: var(--accent); border-color: var(--accent); }
.conn { display: inline-flex; align-items: center; gap: 6px; font-size: 12px; color: var(--muted); }
.dot { width: 8px; height: 8px; border-radius: 50%; background: var(--line); flex: none; }
.dot.on { background: var(--online); box-shadow: 0 0 0 3px color-mix(in srgb, var(--online) 22%, transparent); }
.dot.warn { background: var(--warn); }
.me-name { width: 150px !important; padding: 3px 8px !important; }

.layout { display: grid; grid-template-columns: minmax(0, 1fr) 340px; gap: 0; height: calc(100vh - 53px); }
.main { display: flex; flex-direction: column; min-height: 0; border-right: 1px solid var(--line); }
.side { overflow-y: auto; padding: 14px; display: flex; flex-direction: column; gap: 14px; }
.side section { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); padding: 12px 14px; }
.side h2 { font-size: 13px; margin: 0 0 8px; display: flex; justify-content: space-between; align-items: baseline; }

/* ---- timeline ---- */
.timeline { flex: 1; overflow-y: auto; padding: 14px 16px 6px; }
.empty { color: var(--muted); text-align: center; margin-top: 12vh; }
.msg { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); padding: 8px 12px; margin-bottom: 8px; }
.msg.mine { background: var(--mine); }
.msg.fresh { animation: fresh 1.2s ease-out; }
@keyframes fresh { from { border-color: var(--accent); } }
.msg-head { display: flex; gap: 8px; align-items: baseline; font-size: 12px; color: var(--muted); }
.msg-head .from { color: var(--ink); font-weight: 600; font-size: 13px; }
.msg-head .type { font-family: var(--mono); font-size: 11.5px; border: 1px solid var(--line); border-radius: 5px; padding: 0 5px; }
.msg-head .seq { margin-left: auto; font-family: var(--mono); }
.msg-text { white-space: pre-wrap; word-break: break-word; margin-top: 3px; }
.msg pre { margin: 6px 0 0; background: var(--code-bg); border-radius: 7px; padding: 8px; overflow-x: auto; max-height: 320px; }
.msg details summary { cursor: pointer; font-size: 12px; color: var(--muted); margin-top: 4px; }
.load-earlier { display: block; margin: 0 auto 10px; }
.new-pill { position: sticky; bottom: 6px; margin: 0 auto; display: block; }

.composer { border-top: 1px solid var(--line); padding: 10px 16px; background: var(--panel); }
.composer textarea { resize: vertical; min-height: 44px; max-height: 240px; }
.composer .row { margin-top: 6px; }
.composer .hint { flex: 1; font-size: 12px; color: var(--muted); }

/* ---- participants ---- */
.people { list-style: none; margin: 0; padding: 0; }
.person { display: grid; grid-template-columns: 12px 1fr auto; gap: 2px 8px; padding: 7px 0; border-top: 1px solid var(--line); align-items: center; }
.person:first-child { border-top: 0; }
.person .name { font-weight: 600; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.person .when { font-size: 12px; color: var(--muted); }
.person .meta { grid-column: 2 / 4; font-size: 12px; color: var(--muted); display: flex; gap: 6px; flex-wrap: wrap; }
.chip { font-family: var(--mono); font-size: 11px; border: 1px solid var(--line); border-radius: 5px; padding: 0 5px; }
.person .status { grid-column: 2 / 4; font-size: 12px; }

/* ---- share ---- */
.tokens { list-style: none; margin: 10px 0 0; padding: 0; }
.tokens li { display: flex; gap: 8px; align-items: center; padding: 6px 0; border-top: 1px solid var(--line); font-size: 13px; }
.tokens li .grow { flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.tokens li.expired { opacity: .55; }
.invite { margin-top: 10px; padding: 10px; border: 1px dashed var(--accent); border-radius: 8px; }
.invite input { font-family: var(--mono); font-size: 12px; }
.snippet-head { display: flex; justify-content: space-between; align-items: flex-end; gap: 8px; }
.snippet pre { background: var(--code-bg); border-radius: 7px; padding: 8px; overflow-x: auto; margin: 4px 0 10px; white-space: pre; }

.toast {
  position: fixed; bottom: 16px; left: 50%; transform: translateX(-50%);
  background: var(--ink); color: var(--bg); padding: 7px 14px; border-radius: 8px; font-size: 13px; z-index: 20;
}
.error-box { color: var(--danger); margin-top: 8px; font-size: 13px; }

@media (max-width: 860px) {
  .layout { grid-template-columns: 1fr; height: auto; }
  .main { height: 70vh; border-right: 0; border-bottom: 1px solid var(--line); }
  .top { position: static; }
}

/* =====================================================================
   1990s homepage (landing + no-access). Fixed palette on purpose: the
   web of 1997 had no dark mode.
   ===================================================================== */
.retro-body {
  background-color: #008080;
  background-image:
    radial-gradient(rgba(255,255,255,.07) 1px, transparent 1px),
    radial-gradient(rgba(0,0,0,.08) 1px, transparent 1px);
  background-size: 16px 16px, 16px 16px;
  background-position: 0 0, 8px 8px;
  color-scheme: light;
}
.retro { padding: 18px 12px 40px; font: 16px/1.35 "Times New Roman", Times, serif; color: #000; }
.retro a { color: #0000ee; text-decoration: underline; }
.retro a:visited { color: #551a8b; }
.retro a:hover { color: #ff0000; }
.retro h2 { font: bold 22px/1.2 "Times New Roman", Times, serif; color: #000080; margin: 22px 0 8px; }
.retro code, .retro pre { font-family: "Courier New", Courier, monospace; font-size: 14px; }
.r-page {
  max-width: 780px; margin: 0 auto; background: #c0c0c0; padding: 14px 20px 18px;
  border: 3px solid; border-color: #fff #404040 #404040 #fff;
  box-shadow: 4px 4px 0 rgba(0,0,0,.45);
}
.r-head { text-align: center; }
.r-logo {
  margin: 4px 0 0; font: italic 900 56px/1 "Times New Roman", Times, serif; letter-spacing: -1px;
  color: #ffff00; text-shadow: 3px 3px 0 #ff0000, 5px 5px 0 #000080;
  -webkit-text-stroke: 1px #000080;
}
.r-tld { font-size: 26px; color: #000080; text-shadow: none; -webkit-text-stroke: 0; margin-left: 2px; }
.r-tag { margin: 6px 0 10px; font-style: italic; font-size: 19px; }
.r-new { color: #ff0000; font: bold 15px Arial, Helvetica, sans-serif; vertical-align: super; animation: r-blink 1s steps(1) infinite; }
@keyframes r-blink { 50% { visibility: hidden; } }

.r-ticker {
  overflow: hidden; white-space: nowrap; background: #000; color: #00ff00;
  font: bold 14px "Courier New", Courier, monospace; padding: 4px 0;
  border: 2px solid; border-color: #404040 #fff #fff #404040; margin-bottom: 14px;
}
.r-ticker span { display: inline-block; padding-left: 100%; animation: r-scroll 22s linear infinite; }
@keyframes r-scroll { to { transform: translateX(-100%); } }
@media (prefers-reduced-motion: reduce) {
  .r-ticker span { animation: none; padding-left: 8px; }
  .r-new { animation: none; }
}

.r-hr { border: 0; height: 4px; margin: 22px 0 12px; border-top: 2px solid #808080; border-bottom: 2px solid #fff; }
.r-cols { display: flex; gap: 22px; flex-wrap: wrap; align-items: flex-start; }
.r-col { flex: 1 1 300px; min-width: 0; }
.r-col h2 { margin-top: 4px; }
.r-list { list-style: square; padding-left: 22px; margin: 8px 0; }
.r-list li { margin: 3px 0; }
.r-hot { color: #ff0000; }

/* Win95 window */
.r-win {
  background: #c0c0c0; border: 2px solid; border-color: #dfdfdf #000 #000 #dfdfdf;
  box-shadow: inset 1px 1px 0 #fff, inset -1px -1px 0 #808080; padding: 3px;
  font: 13px Tahoma, "MS Sans Serif", Geneva, Verdana, sans-serif;
}
.r-title {
  background: linear-gradient(90deg, #000080, #1084d0); color: #fff; font-weight: bold;
  padding: 3px 5px; display: flex; justify-content: space-between; align-items: center;
}
.r-ctl { font-family: monospace; letter-spacing: 3px; }
.r-body { padding: 10px 10px 8px; }
.r-body label { display: block; margin: 8px 0 3px; color: #000; font-size: 13px; }
.r-body input[type=text], .r-body select, .r-open input {
  width: 100%; background: #fff; color: #000; border: 2px solid; border-color: #808080 #fff #fff #808080;
  box-shadow: inset 1px 1px 0 #000; border-radius: 0; padding: 3px 5px;
  font: 13px Tahoma, "MS Sans Serif", Geneva, Verdana, sans-serif;
}
.r-check { display: flex !important; gap: 6px; align-items: center; }
.r-actions { margin-top: 12px; text-align: right; }
.r-btn {
  background: #c0c0c0; color: #000; border: 2px solid; border-color: #fff #000 #000 #fff;
  box-shadow: inset -1px -1px 0 #808080, inset 1px 1px 0 #dfdfdf; border-radius: 0;
  padding: 4px 16px; font: 13px Tahoma, "MS Sans Serif", Geneva, Verdana, sans-serif; cursor: pointer;
}
.r-btn:active { border-color: #000 #fff #fff #000; box-shadow: inset 1px 1px 0 #808080; }
.r-btn:focus-visible { outline: 1px dotted #000; outline-offset: -5px; }
.r-btn:disabled { color: #808080; text-shadow: 1px 1px 0 #fff; }
.r-default { font-weight: bold; outline: 1px solid #000; }
.r-mini { padding: 0 8px; font-size: 11px; }
.r-err { color: #c00000; margin-top: 6px; }
.r-body p { margin: 6px 0; }

/* terminal */
.r-term { background: #000; border: 2px solid; border-color: #404040 #fff #fff #404040; }
.r-term-bar { color: #c0c0c0; font: 12px "Courier New", monospace; padding: 4px 8px; display: flex; justify-content: space-between; align-items: center; border-bottom: 1px solid #333; }
.r-term pre { margin: 0; padding: 10px; color: #00ff00; overflow-x: auto; }

.r-steps { padding-left: 26px; margin: 6px 0; }
.r-steps li { margin: 4px 0; }
.r-table { border-collapse: separate; border-spacing: 2px; width: 100%; background: #c0c0c0; border: 2px solid; border-color: #fff #404040 #404040 #fff; }
.r-table th { background: #000080; color: #fff; text-align: left; padding: 4px 8px; font: bold 14px Arial, Helvetica, sans-serif; }
.r-table td { background: #fff; padding: 5px 8px; border: 1px solid; border-color: #808080 #dfdfdf #dfdfdf #808080; vertical-align: top; }
.r-open { display: flex; gap: 8px; }
.r-open input { flex: 1; }
.r-faq { margin: 0; }
.r-faq dt { font-weight: bold; color: #000080; margin-top: 10px; }
.r-faq dd { margin: 2px 0 0 22px; }
.r-sr { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }

.r-foot { text-align: center; }
.r-foot p { margin: 6px 0; }
.r-small { font-size: 13px; color: #303030; }
.r-badges { display: flex; gap: 8px; justify-content: center; flex-wrap: wrap; margin: 12px 0 !important; }
.r-badge {
  width: 88px; height: 31px; display: inline-flex; align-items: center; justify-content: center; text-align: center;
  font: bold 9px/1.05 Verdana, Arial, sans-serif; letter-spacing: .5px; color: #fff; background: #000080;
  border: 1px solid; border-color: #fff #000 #000 #fff;
}
.r-badge.b2 { background: #006400; }
.r-badge.b3 { background: #800000; }
.r-badge.b4 { background: #000; color: #ffff00; }
@media (max-width: 560px) { .r-logo { font-size: 42px; } .r-page { padding: 10px 12px 14px; } }