/* Layout: a chat client in a framed window (rail | channels | chat | members) under a thin prototype guide strip. Single dark look, by choice. */
:root {
  color-scheme: dark;
  --rail: #15161b;
  --side: #1b1c22;
  --chat: #23242b;
  --elev: #2b2d35;
  --input: #30323c;
  --line: #3a3c47;
  --fg: #e7e7ec;
  --dim: #a6a8b4;
  --faint: #7a7d8c;
  --bot: #2fb5a5;
  --primary: #17867a;
  --primary-hi: #1b9a8c;
  --pick: #f2c14e;
  --night: #8d93d6;
  --danger: #e5676b;
  --h0: #2e3039;
  --h1: #1d4746;
  --h2: #1f6a63;
  --h3: #2a9184;
  --h4: #56d3bb;
  --on-h4: #0d2a26;
  --sans: "IBM Plex Sans", system-ui, -apple-system, "Segoe UI", sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, "SF Mono", Menlo, monospace;
}
html, body { height: 100%; }
[hidden] { display: none !important; }
img { max-width: 100%; }
body {
  margin: 0;
  background: var(--rail); color: var(--fg); font: 15px/1.4 var(--sans);
  display: flex; flex-direction: column; gap: 10px;
  padding-block: 12px;
  padding-left: max(16px, env(safe-area-inset-left, 0px));
  padding-right: max(16px, env(safe-area-inset-right, 0px));
  box-sizing: border-box;
}
*, *::before, *::after { box-sizing: border-box; }
button, input, select { font: inherit; color: inherit; }
button { cursor: pointer; }
:focus-visible { outline: 2px solid var(--pick); outline-offset: 2px; }

/* guide strip */
.guide { display: flex; flex-wrap: wrap; align-items: center; gap: 8px 16px; font-size: 13px; color: var(--dim); }
.guide .tag { font: 500 11px/1 var(--mono); letter-spacing: .08em; text-transform: uppercase; color: var(--bot); border: 1px solid var(--bot); border-radius: 4px; padding: 4px 6px; }
.guide .scenario { flex: 1 1 320px; min-width: 0; }
.guide .hint { color: var(--fg); background: var(--elev); border-radius: 6px; padding: 6px 10px; display: flex; gap: 8px; align-items: center; }
.guide .hint b { font: 500 12px var(--mono); color: var(--pick); white-space: nowrap; }
.ghost { background: none; border: 1px solid var(--line); border-radius: 6px; padding: 5px 10px; color: var(--dim); }
.ghost:hover { color: var(--fg); border-color: var(--faint); }

/* app shell */
.stage { flex: 1; min-height: 0; display: grid; grid-template-columns: 300px minmax(0, 1fr); grid-template-rows: minmax(0, 1fr); gap: 12px; }
.app { position: relative; min-height: 0; display: grid; grid-template-columns: 64px 220px minmax(0, 1fr) 232px; border-radius: 10px; overflow: hidden; border: 1px solid var(--line); }
.rail { background: var(--rail); display: flex; flex-direction: column; align-items: center; gap: 8px; padding: 12px 0; border-right: 1px solid #0000; }
.srv { width: 44px; height: 44px; border-radius: 50%; background: var(--elev); display: grid; place-items: center; font: 600 13px var(--sans); color: var(--dim); }
.srv.on { border-radius: 14px; background: var(--primary); color: #fff; }
.rail hr { width: 28px; border: 0; border-top: 2px solid var(--elev); margin: 2px 0; }
.channels { background: var(--side); display: flex; flex-direction: column; min-width: 0; }
.channels header { padding: 14px 16px; font-weight: 600; border-bottom: 1px solid var(--rail); }
.channels nav { padding: 12px 8px; display: flex; flex-direction: column; gap: 2px; font-size: 14px; }
.channels .cat { font: 600 11px var(--sans); letter-spacing: .06em; text-transform: uppercase; color: var(--faint); padding: 10px 8px 4px; }
.channels .ch { padding: 6px 8px; border-radius: 4px; color: var(--faint); display: flex; gap: 6px; }
.channels .ch.on { background: var(--elev); color: var(--fg); }
.channels .ch i { font-style: normal; color: var(--faint); }
.me-bar { margin-top: auto; background: var(--rail); padding: 10px 12px; display: flex; gap: 10px; align-items: center; font-size: 13px; }
.me-bar small { display: block; color: var(--faint); font-size: 11px; }

.chat { background: var(--chat); display: flex; flex-direction: column; min-width: 0; min-height: 0; }
.chat > header { padding: 12px 16px; border-bottom: 1px solid var(--rail); display: flex; gap: 10px; align-items: baseline; min-width: 0; }
.chat > header b { font-size: 15px; }
.chat > header b::before { content: "# "; color: var(--faint); }
.chat > header span { color: var(--faint); font-size: 13px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
#msgs { flex: 1; overflow-y: auto; padding: 16px 0 8px; display: flex; flex-direction: column; gap: 14px; }
.msg { display: grid; grid-template-columns: 40px minmax(0, 1fr); gap: 14px; padding: 2px 16px; }
.msg:hover { background: #ffffff05; }
.av { width: 40px; height: 40px; border-radius: 50%; display: grid; place-items: center; font: 600 15px var(--sans); color: #15161b; background: var(--c); }
.av.sm { width: 22px; height: 22px; font-size: 11px; }
.av.bot { background: var(--bot); color: #0d2a26; font-size: 12px; }
.mhead { display: flex; gap: 8px; align-items: baseline; flex-wrap: wrap; }
.mhead .nm { font-weight: 600; color: var(--c, var(--fg)); }
.mhead .app-tag { font: 600 10px var(--sans); background: var(--primary); color: #fff; border-radius: 3px; padding: 1px 4px; letter-spacing: .03em; }
.mhead .ts { font-size: 12px; color: var(--faint); }
.used { font-size: 13px; color: var(--faint); margin-bottom: 2px; }
.used code { font-family: var(--mono); color: var(--bot); }
.txt { color: var(--fg); overflow-wrap: anywhere; }
.mention { background: #2fb5a533; color: #9fe8dc; border-radius: 3px; padding: 0 2px; }
.sys { padding: 0 16px 0 70px; font-size: 13px; color: var(--faint); display: flex; gap: 6px; align-items: center; }
.sys::before { content: "→"; color: var(--bot); }
.typing { padding: 0 16px 0 70px; font-size: 12px; color: var(--dim); min-height: 18px; }

.embed { margin-top: 6px; background: var(--elev); border-left: 4px solid var(--bot); border-radius: 4px; padding: 12px 14px; max-width: 560px; display: flex; flex-direction: column; gap: 10px; }
.embed h3 { margin: 0; font-size: 15px; }
.embed p { margin: 0; color: var(--dim); font-size: 14px; }
.embed .meta { font: 13px var(--mono); color: var(--dim); }
.who { display: flex; flex-wrap: wrap; gap: 6px; }
.chip { display: inline-flex; align-items: center; gap: 6px; font-size: 13px; background: var(--input); border-radius: 999px; padding: 2px 10px 2px 2px; }
.chip.wait { color: var(--faint); }
.chip .st { font: 11px var(--mono); }
.chip.done .st { color: var(--h4); }
.btns { display: flex; flex-wrap: wrap; gap: 8px; }
.btn { border: 0; border-radius: 4px; padding: 7px 14px; font-weight: 500; font-size: 14px; background: var(--input); color: var(--fg); }
.btn:hover { background: var(--line); }
.btn.pri { background: var(--primary); color: #fff; }
.btn.pri:hover { background: var(--primary-hi); }
.btn:disabled { opacity: .55; cursor: default; }
.btn.chosen { background: var(--pick); color: #2a2208; }

/* compact heatmap in the bot message */
.hm { display: grid; grid-template-columns: 44px repeat(var(--cols), 30px); gap: 2px; font: 10px var(--mono); color: var(--faint); background: #1b1c22; border-radius: 6px; padding: 10px; width: max-content; max-width: 100%; overflow-x: auto; }
.hm .dh { text-align: center; color: var(--dim); }
.hm .rl { text-align: right; padding-right: 6px; line-height: 10px; }
.hm .c { height: 10px; border-radius: 2px; background: var(--h0); position: relative; }
.hm .c.pk { outline: 2px solid var(--pick); outline-offset: 0; z-index: 1; }
.hm .c.pk::after { content: attr(data-k); position: absolute; inset: 0; display: grid; place-items: center; font: 600 9px/1 var(--mono); color: var(--on-h4); }
[data-n="1"] { background: var(--h1) !important; }
[data-n="2"] { background: var(--h2) !important; }
[data-n="3"] { background: var(--h3) !important; }
[data-n="4"] { background: var(--h4) !important; color: var(--on-h4) !important; }
.legend { display: flex; gap: 10px; align-items: center; font: 11px var(--mono); color: var(--faint); flex-wrap: wrap; }
.legend span { display: inline-flex; gap: 4px; align-items: center; }
.legend i { width: 12px; height: 10px; border-radius: 2px; display: inline-block; background: var(--h0); }
.legend .pkk { outline: 2px solid var(--pick); background: transparent; }

.opts { display: flex; flex-direction: column; gap: 8px; }
.opt { background: #1f2027; border-radius: 6px; padding: 10px 12px; display: grid; grid-template-columns: 26px minmax(0, 1fr); gap: 4px 10px; }
.opt > :not(.k) { grid-column: 2; }
.opt .k { grid-row: 1 / span 2; width: 26px; height: 26px; border-radius: 50%; border: 2px solid var(--pick); color: var(--pick); display: grid; place-items: center; font: 600 13px var(--mono); }
.opt .when { display: flex; justify-content: space-between; gap: 8px; flex-wrap: wrap; font-weight: 600; }
.opt .when small { font: 500 12px var(--mono); color: var(--h4); }
.opt .when small.partial { color: var(--pick); }
.opt .zones { display: flex; flex-wrap: wrap; gap: 4px 14px; font-size: 13px; color: var(--dim); }
.opt .zones b { color: var(--fg); font-weight: 500; }
.opt .note { font-size: 12px; color: var(--pick); }
.opt .votes { font: 12px var(--mono); color: var(--faint); }
.nightnote { font-size: 13px; color: var(--dim); border-top: 1px solid var(--line); padding-top: 8px; }
.nightnote .moon { color: var(--night); }
.linkish { background: none; border: 0; padding: 0; color: var(--bot); text-decoration: underline; font-size: 13px; }
.skiplist { margin: 6px 0 0; padding-left: 18px; font-size: 13px; color: var(--dim); }

.final-row { display: grid; grid-template-columns: 22px 64px minmax(0, 1fr); gap: 8px; align-items: center; font-size: 14px; }
.final-row .city { color: var(--faint); font-size: 13px; }

/* composer */
.composer { padding: 0 16px 16px; position: relative; }
.composer input { width: 100%; background: var(--input); border: 0; border-radius: 8px; padding: 12px 14px; color: var(--fg); }
.composer input::placeholder { color: var(--faint); }
.slash { position: absolute; left: 16px; right: 16px; bottom: 64px; background: var(--side); border: 1px solid var(--line); border-radius: 8px; padding: 6px; box-shadow: 0 8px 24px #0006; }
.slash .lbl { font: 600 11px var(--sans); letter-spacing: .06em; text-transform: uppercase; color: var(--faint); padding: 6px 8px; }
.slash button { width: 100%; text-align: left; background: var(--elev); border: 0; border-radius: 4px; padding: 8px 10px; display: flex; gap: 10px; align-items: center; }
.slash code { font: 500 14px var(--mono); color: var(--fg); }
.slash span { color: var(--dim); font-size: 13px; }

/* members */
.members { background: var(--side); padding: 16px 12px; overflow-y: auto; display: flex; flex-direction: column; gap: 4px; }
.members .cat { font: 600 11px var(--sans); letter-spacing: .06em; text-transform: uppercase; color: var(--faint); padding: 8px 6px 4px; }
.mem { display: grid; grid-template-columns: 32px minmax(0, 1fr); gap: 10px; align-items: center; padding: 6px; border-radius: 4px; }
.mem .av { width: 32px; height: 32px; font-size: 13px; }
.mem b { font-weight: 500; font-size: 14px; color: var(--c, var(--fg)); }
.mem small { display: block; color: var(--faint); font-size: 12px; font-variant-numeric: tabular-nums; }
.mem small.ok { color: var(--h4); }

/* modals */
.scrim { position: absolute; inset: 0; background: #0b0c10cc; display: grid; place-items: center; padding: 16px; padding-left: max(16px, env(safe-area-inset-left, 0px)); padding-right: max(16px, env(safe-area-inset-right, 0px)); z-index: 20; }
.modal { background: var(--chat); border-radius: 10px; width: min(560px, 100%); max-height: 100%; overflow-y: auto; display: flex; flex-direction: column; box-shadow: 0 20px 60px #000a; }
.modal.wide { width: min(860px, 100%); }
.modal header { padding: 18px 20px 6px; display: flex; gap: 10px; align-items: center; }
.modal header h2 { margin: 0; font-size: 18px; text-wrap: balance; }
.modal .mb { padding: 10px 20px 16px; display: flex; flex-direction: column; gap: 14px; }
.modal footer { padding: 14px 20px; background: var(--side); display: flex; justify-content: flex-end; gap: 10px; flex-wrap: wrap; border-radius: 0 0 10px 10px; }
.field { display: flex; flex-direction: column; gap: 6px; }
.field > label, .field > .lbl { font: 600 12px var(--sans); letter-spacing: .05em; text-transform: uppercase; color: var(--dim); }
.field input[type=text], .field select { background: var(--rail); border: 1px solid var(--line); border-radius: 4px; padding: 9px 10px; }
.days { display: flex; flex-wrap: wrap; gap: 6px; }
.days label { display: flex; gap: 6px; align-items: center; background: var(--rail); border: 1px solid var(--line); border-radius: 4px; padding: 6px 10px; font-size: 14px; }
.check { display: grid; grid-template-columns: 20px minmax(0, 1fr); gap: 4px 10px; align-items: start; background: var(--rail); border: 1px solid var(--line); border-radius: 6px; padding: 10px 12px; }
.check input { margin-top: 3px; }
.check small { grid-column: 2; color: var(--faint); font-size: 13px; }
.help { color: var(--faint); font-size: 13px; margin: 0; }
.err { color: var(--danger); font-size: 13px; margin: 0; }

.tzbox { background: var(--rail); border-radius: 8px; padding: 16px; display: flex; flex-direction: column; gap: 10px; }
.tzbox .big { font-size: 20px; font-weight: 600; }

/* availability entry grid */
.eg-wrap { overflow-x: auto; }
.eg { display: grid; grid-template-columns: 58px repeat(var(--cols), minmax(48px, 1fr)) 92px; gap: 3px; min-width: max-content; user-select: none; -webkit-user-select: none; }
.eg .dh { text-align: center; font-size: 13px; color: var(--dim); padding-bottom: 4px; }
.eg .dh b { display: block; color: var(--fg); }
.eg .rl { font: 12px var(--mono); color: var(--dim); text-align: right; padding-right: 6px; align-self: center; font-variant-numeric: tabular-nums; }
.eg .cell { height: 26px; border: 1px solid var(--line); background: var(--rail); border-radius: 3px; touch-action: none; padding: 0; }
.eg .cell:hover { border-color: var(--faint); }
.eg .cell.on { background: var(--h3); border-color: var(--h4); }
.eg .aw { display: flex; gap: 3px; align-items: center; padding-left: 6px; }
.eg .aw span { width: 20px; height: 20px; border-radius: 50%; display: grid; place-items: center; font: 600 10px var(--sans); color: #15161b; background: var(--c); }
.eg .aw span.zz { background: transparent; color: var(--night); border: 1px dashed var(--night); }
.eg .awh { font-size: 11px; color: var(--faint); padding-left: 6px; align-self: end; padding-bottom: 4px; }
.gaprow { grid-column: 1 / -1; background: none; border: 1px dashed var(--line); border-radius: 4px; padding: 5px 10px; color: var(--faint); font-size: 13px; text-align: left; display: flex; gap: 8px; align-items: center; }
.gaprow:hover { color: var(--fg); }
.gaprow .moon { color: var(--night); }
.eg-bar { display: flex; flex-wrap: wrap; gap: 8px 14px; align-items: center; font-size: 14px; }
.eg-bar .count { font: 500 13px var(--mono); color: var(--h4); }
.hover-line { font-size: 13px; color: var(--dim); min-height: 20px; background: var(--rail); border-radius: 4px; padding: 6px 10px; }
.hover-line b { color: var(--fg); font-weight: 500; }

/* full group grid */
.fg-top { display: flex; flex-wrap: wrap; gap: 10px 16px; align-items: center; }
.fg-top select { background: var(--rail); border: 1px solid var(--line); border-radius: 4px; padding: 6px 8px; }
.fg-top label { font-size: 14px; color: var(--dim); display: flex; gap: 6px; align-items: center; }
.fg-body { display: grid; grid-template-columns: minmax(0, 1fr) 240px; gap: 16px; align-items: start; }
.fg { display: grid; grid-template-columns: 58px repeat(var(--cols), minmax(44px, 1fr)); gap: 3px; min-width: max-content; }
.fg .dh { text-align: center; font-size: 13px; color: var(--dim); padding-bottom: 4px; }
.fg .dh b { display: block; color: var(--fg); }
.fg .rl { font: 12px var(--mono); color: var(--dim); text-align: right; padding-right: 6px; align-self: center; }
.fg .cell { height: 24px; border: 0; border-radius: 3px; background: var(--h0); font: 500 12px var(--mono); color: var(--fg); position: relative; padding: 0; }
.fg .cell.pk { outline: 2px solid var(--pick); outline-offset: -1px; }
.fg .cell.pk::after { content: attr(data-k); position: absolute; top: -6px; right: -4px; background: var(--pick); color: #2a2208; font: 600 10px/14px var(--mono); width: 14px; height: 14px; border-radius: 50%; }
.fg .cell.sel { box-shadow: 0 0 0 2px var(--fg); }
.fg .cell .zz { position: absolute; left: 3px; top: 3px; width: 5px; height: 5px; border-radius: 50%; background: var(--night); }
.detail { background: var(--rail); border-radius: 8px; padding: 14px; display: flex; flex-direction: column; gap: 10px; font-size: 14px; position: sticky; top: 0; }
.detail h4 { margin: 0; font-size: 15px; }
.detail .row { display: grid; grid-template-columns: 22px minmax(0, 1fr) auto; gap: 8px; align-items: center; }
.detail .row small { color: var(--faint); display: block; font-size: 12px; }
.detail .yes { color: var(--h4); font: 500 12px var(--mono); }
.detail .no { color: var(--faint); font: 500 12px var(--mono); }
.detail .zzt { color: var(--night); font-size: 12px; }

@media (max-width: 1440px) { .app { grid-template-columns: 64px 200px minmax(0, 1fr); } .members { display: none; } }
@media (max-width: 1100px) {
  .stage { grid-template-columns: minmax(0, 1fr); grid-template-rows: auto minmax(0, 1fr); }
  .tour { max-height: 38vh; }
  .steps li.done, .steps li.todo { display: none; }
}
@media (max-width: 760px) {
  .app { grid-template-columns: minmax(0, 1fr); }
  .rail, .channels { display: none; }
  .fg-body { grid-template-columns: minmax(0, 1fr); }
  .detail { position: static; }
  .msg { grid-template-columns: 32px minmax(0, 1fr); gap: 10px; padding: 2px 12px; }
  .msg > .av { width: 32px; height: 32px; font-size: 13px; }
  .sys, .typing { padding-left: 54px; }
}
/* walkthrough */
.tour { background: var(--side); border: 1px solid var(--line); border-radius: 10px; overflow-y: auto; padding: 14px; display: flex; flex-direction: column; gap: 10px; min-height: 0; }
.tour-head { display: flex; justify-content: space-between; align-items: baseline; gap: 8px; }
.tour-head b { font-size: 16px; }
.tour-head span { font: 500 12px var(--mono); color: var(--pick); }
.why-t { font-size: 13px; color: var(--dim); display: flex; gap: 6px; align-items: center; }
.steps { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 4px; }
.steps li { display: grid; grid-template-columns: 26px minmax(0, 1fr); gap: 10px; padding: 8px; border-radius: 6px; }
.steps .n { width: 26px; height: 26px; border-radius: 50%; display: grid; place-items: center; font: 600 12px var(--mono); border: 1px solid var(--line); color: var(--faint); }
.steps li.cur { background: var(--elev); }
.steps li.cur .n { background: var(--pick); border-color: var(--pick); color: #2a2208; }
.steps li.done .n { background: var(--primary); border-color: var(--primary); color: #fff; }
.steps .st-t { display: block; padding-top: 3px; }
.steps li.done .st-t, .steps li.todo .st-t { color: var(--dim); font-weight: 500; }
.steps p { margin: 6px 0 0; font-size: 14px; }
.steps code { font-family: var(--mono); color: var(--bot); }
.steps .why { color: var(--dim); font-size: 13px; border-left: 2px solid var(--bot); padding-left: 8px; }
.sub { margin: 8px 0 0; padding: 0; list-style: none; font-size: 13px; display: flex; flex-direction: column; gap: 5px; }
.sub li { padding: 0 0 0 20px; position: relative; color: var(--fg); display: block; }
.sub li::before { content: "○"; position: absolute; left: 0; color: var(--faint); }
.sub li.ok { color: var(--faint); text-decoration: line-through; }
.sub li.ok::before { content: "✓"; color: var(--h4); text-decoration: none; }
.vote-btns { display: flex; flex-wrap: wrap; gap: 8px; }
.guide, .tour { position: relative; z-index: 45; }
.tour-lead { margin: 0; font-size: 13px; color: var(--dim); }
#tour-layer .tip-hint { margin-right: auto; font: 600 11px var(--mono); color: var(--primary); text-transform: uppercase; letter-spacing: .06em; }
.tour-ctl { display: flex; flex-wrap: wrap; gap: 8px 12px; align-items: center; }
.sub li.now { color: var(--pick); font-weight: 600; }
.sub li.now::before { content: "▸"; color: var(--pick); }
#tour-layer .shade { position: fixed; inset: 0; background: #07080bb3; z-index: 40; pointer-events: none; }
#tour-layer .blocker { position: fixed; inset: 0; z-index: 40; }
#tour-layer .ring { position: fixed; z-index: 41; border: 2px solid var(--pick); border-radius: 8px; pointer-events: none; }
#tour-layer .tip { position: fixed; z-index: 46; width: min(320px, calc(100vw - 16px)); background: var(--fg); color: #1b1c22; border-radius: 10px; padding: 14px 16px; box-shadow: 0 12px 40px #000c; display: flex; flex-direction: column; gap: 10px; }
#tour-layer .tip p { margin: 0; font-size: 14px; line-height: 1.45; }
#tour-layer .tip code { font-family: var(--mono); background: #1b1c2214; padding: 0 3px; border-radius: 3px; }
#tour-layer .tip-k { font: 600 11px var(--mono); letter-spacing: .04em; text-transform: uppercase; color: #5b5e6d; }
#tour-layer .tip-f { display: flex; justify-content: flex-end; gap: 8px; align-items: center; }
#tour-layer .tip .btn { background: #d9dae0; color: #1b1c22; }
#tour-layer .tip .btn.pri { background: var(--primary); color: #fff; }
#tour-layer .tip-do { font: 500 12px var(--mono); color: var(--primary); }

@media (prefers-reduced-motion: no-preference) {
  #tour-layer .ring { animation: ring 1.6s ease-in-out infinite; }
  @keyframes ring { 50% { box-shadow: 0 0 0 5px #f2c14e40; } }
  #tour-layer .tip.nudge { animation: nudge .35s; }
  @keyframes nudge { 25% { transform: translateX(-6px); } 75% { transform: translateX(6px); } }
  .msg.new { animation: rise .25s ease-out; }
  @keyframes rise { from { transform: translateY(6px); opacity: .4; } to { transform: none; opacity: 1; } }
}