:root {
  --bg: #FBFBFA; --surface: #FFFFFF; --sunk: #F5F4F0; --hover: #F1F0EC;
  --border: #E8E6E1; --ink: #1C1C1A; --ink2: #55544F; --muted: #6B6A65;
  --accent: #3B5BDB; --accent-bg: #EEF0FB; --danger: #B4381F; --warn: #8A5A00;
  --todo: #9A9890; --progress: #3B5BDB; --half: #C98A1B; --done: #2F855A;
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--ink); font: 14px/1.45 'Instrument Sans', system-ui, sans-serif; }
a { color: inherit; }
button, input, select, textarea { font: inherit; color: inherit; }
button { cursor: pointer; }
h1 { margin: 0; font-size: 24px; font-weight: 600; letter-spacing: -0.01em; }
h2 { margin: 0; font-size: 16px; font-weight: 600; }
.muted { color: var(--muted); }
.small { font-size: 12px; }

/* shell */
.shell { min-height: 100vh; display: flex; flex-wrap: wrap; }
.side { flex: 0 0 232px; padding: 24px 16px; border-right: 1px solid var(--border); background: var(--surface); display: flex; flex-direction: column; gap: 28px; }
.brand { display: flex; align-items: center; gap: 10px; padding: 0 8px; font-weight: 600; font-size: 16px; }
.brand i { width: 28px; height: 28px; border-radius: 9px; background: var(--ink); }
.nav { display: flex; flex-direction: column; gap: 4px; }
.nav a { display: flex; align-items: center; gap: 10px; padding: 9px 10px; border-radius: 10px; text-decoration: none; color: var(--ink2); }
.nav a.on { background: var(--hover); color: var(--ink); font-weight: 500; }
.nav a span.grow { flex: 1; }
.badge { font-size: 12px; color: #fff; background: var(--accent); border-radius: 99px; padding: 1px 8px; }
.me { margin-top: auto; display: flex; align-items: center; gap: 10px; padding: 0 8px; }
.me .who { display: flex; flex-direction: column; line-height: 1.3; flex: 1; min-width: 0; }
.link { background: none; border: 0; padding: 0; color: var(--muted); font-size: 12px; text-decoration: underline; }
.main { flex: 999 1 560px; min-width: 0; padding: 32px; display: flex; flex-direction: column; gap: 24px; }
.avatar { flex: none; width: 32px; height: 32px; border-radius: 99px; background: var(--accent-bg); color: var(--accent); display: inline-flex; align-items: center; justify-content: center; font-size: 12px; font-weight: 600; }
.avatar.sm { width: 24px; height: 24px; font-size: 11px; }
.avatar.dark { background: var(--ink); color: #fff; }
.page-head { display: flex; align-items: center; gap: 16px; flex-wrap: wrap; }
.page-head .grow { flex: 1 1 240px; display: flex; flex-direction: column; gap: 4px; }

/* controls */
.btn { padding: 10px 16px; border-radius: 12px; border: 1px solid var(--border); background: var(--surface); font-weight: 500; }
.btn:hover { background: var(--sunk); }
.btn.primary { background: var(--ink); border-color: var(--ink); color: #fff; }
.btn.primary:hover { background: #343430; }
.btn.accent { background: var(--accent); border-color: var(--accent); color: #fff; }
.btn:disabled { opacity: .5; cursor: default; }
.input, select.input, textarea.input { width: 100%; padding: 10px 12px; border: 1px solid var(--border); border-radius: 12px; background: var(--surface); outline: none; }
.input:focus, .btn:focus-visible, .chip:focus-visible { border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-bg); }
textarea.input { resize: vertical; line-height: 1.55; }
.chips { display: flex; gap: 6px; flex-wrap: wrap; }
.chip { padding: 6px 12px; border-radius: 99px; border: 1px solid var(--border); background: var(--surface); color: var(--ink2); font-size: 13px; }
.chip.on { background: var(--ink); border-color: var(--ink); color: #fff; }
.seg { display: inline-flex; padding: 3px; border-radius: 12px; background: var(--hover); }
.seg button { border: 0; background: transparent; padding: 7px 14px; border-radius: 9px; color: var(--ink2); }
.seg button.on { background: var(--surface); color: var(--ink); font-weight: 500; box-shadow: 0 1px 2px rgba(28,28,26,.08); }
.field { display: flex; flex-direction: column; gap: 6px; }
.field label { font-size: 12px; color: var(--muted); }
.row2 { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.dot { width: 8px; height: 8px; border-radius: 99px; display: inline-block; flex: none; }
.prio-high { color: var(--danger); font-weight: 500; }
.prio-medium { color: var(--warn); font-weight: 500; }
.prio-low { color: var(--muted); }
.overdue { color: var(--danger); font-weight: 500; }
.empty { padding: 32px; text-align: center; color: var(--muted); }
.card { background: var(--surface); border: 1px solid var(--border); border-radius: 18px; }

/* inbox */
.inbox { display: flex; flex-wrap: wrap; gap: 24px; align-items: flex-start; }
.inbox .list { flex: 1 1 340px; max-width: 440px; display: flex; flex-direction: column; gap: 8px; }
.conv { display: flex; flex-direction: column; gap: 6px; padding: 14px 16px; border-radius: 14px; border: 1px solid transparent; text-decoration: none; }
.conv:hover { background: var(--sunk); }
.conv.on { background: var(--surface); border-color: #C9D2F5; box-shadow: 0 1px 2px rgba(28,28,26,.04); }
.conv .top { display: flex; gap: 8px; align-items: baseline; }
.conv .top b { flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.conv .sub { display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.conv .meta { display: flex; gap: 10px; font-size: 12px; color: var(--muted); }
.need { color: var(--accent); font-weight: 500; }
.thread { flex: 2 1 440px; min-width: 0; display: flex; flex-direction: column; min-height: 560px; }
.thread .head { display: flex; align-items: center; gap: 16px; flex-wrap: wrap; padding: 20px 24px; border-bottom: 1px solid var(--border); }
.thread .head .grow { flex: 1 1 220px; display: flex; flex-direction: column; gap: 2px; }
.msgs { flex: 1; padding: 24px; display: flex; flex-direction: column; gap: 16px; }
.bubble { max-width: 560px; padding: 14px 16px; border-radius: 16px; line-height: 1.55; background: var(--sunk); align-self: flex-start; white-space: pre-wrap; overflow-wrap: anywhere; }
.bubble.out { background: var(--accent-bg); align-self: flex-end; }
.bubble .who { font-size: 12px; color: var(--muted); margin-bottom: 6px; }
.bubble.out .who { color: var(--accent); }
.composer-box { border-top: 1px solid var(--border); padding: 16px 24px; display: flex; flex-direction: column; gap: 12px; }

/* board */
.board { display: grid; grid-template-columns: repeat(4, minmax(220px, 1fr)); gap: 16px; align-items: start; overflow-x: auto; padding-bottom: 8px; }
.col { min-height: 480px; padding: 8px; border-radius: 18px; background: var(--sunk); display: flex; flex-direction: column; gap: 10px; }
.col.over { background: var(--accent-bg); }
.col-head { display: flex; align-items: center; gap: 8px; padding: 4px 6px 8px; font-weight: 600; }
.col-head span.n { font-weight: 400; color: var(--muted); font-size: 13px; }
.tcard { padding: 14px 16px; border-radius: 14px; background: var(--surface); border: 1px solid var(--border); display: flex; flex-direction: column; gap: 4px; cursor: grab; }
.tcard.drag { opacity: .45; }
.tcard a.title { text-decoration: none; font-weight: 600; line-height: 1.35; }
.tcard a.title:hover { text-decoration: underline; }
.tcard .line { display: flex; align-items: center; gap: 12px; font-size: 12px; margin-top: 4px; }
.tcard .foot { display: flex; align-items: center; gap: 8px; margin-top: 2px; }
.tcard .foot .grow { flex: 1; font-size: 13px; color: var(--ink2); }
.cc { display: inline-flex; align-items: center; gap: 4px; font-size: 12px; color: var(--muted); }

/* task page */
.back { color: var(--muted); text-decoration: none; font-size: 13px; }
.task { display: flex; flex-wrap: wrap; gap: 24px; align-items: flex-start; }
.task .center { flex: 2 1 460px; min-width: 0; display: flex; flex-direction: column; gap: 24px; }
.task h1.title { font-size: 28px; line-height: 1.2; letter-spacing: -0.015em; }
.title-input { width: 100%; font-size: 28px; font-weight: 600; letter-spacing: -0.015em; border: 1px solid transparent; border-radius: 10px; padding: 2px 6px; margin-left: -6px; background: transparent; }
.title-input:hover, .title-input:focus { border-color: var(--border); background: var(--surface); outline: none; }
.original { background: var(--sunk); border-radius: 16px; padding: 16px 18px; display: flex; flex-direction: column; gap: 8px; }
.original .m { line-height: 1.55; white-space: pre-wrap; overflow-wrap: anywhere; }
.private { display: inline-flex; align-items: center; gap: 6px; font-size: 12px; color: var(--muted); background: var(--hover); border-radius: 99px; padding: 3px 10px; }
.comment { display: flex; gap: 12px; }
.comment .body { flex: 1; min-width: 0; display: flex; flex-direction: column; gap: 4px; }
.comment .text { line-height: 1.55; white-space: pre-wrap; overflow-wrap: anywhere; }
.comment.client .text { background: var(--accent-bg); border-radius: 12px; padding: 10px 14px; }
.mention { color: var(--accent); font-weight: 500; background: var(--accent-bg); border-radius: 6px; padding: 0 4px; }
.composer { border: 1px solid var(--border); background: var(--surface); border-radius: 16px; position: relative; }
.tabs { display: flex; gap: 4px; padding: 8px 8px 0; border-bottom: 1px solid var(--border); }
.tabs button { border: 0; background: transparent; padding: 9px 14px; color: var(--muted); border-bottom: 2px solid transparent; margin-bottom: -1px; }
.tabs button.on { color: var(--ink); font-weight: 500; border-bottom-color: var(--ink); }
.composer .inner { padding: 14px 16px; display: flex; flex-direction: column; gap: 12px; }
.composer textarea { border: 0; outline: none; resize: none; padding: 0; background: transparent; line-height: 1.55; width: 100%; }
.composer .bar { display: flex; align-items: center; gap: 8px; }
.icon-btn { width: 36px; height: 36px; border-radius: 10px; border: 1px solid var(--border); background: var(--surface); color: var(--ink2); display: inline-flex; align-items: center; justify-content: center; font-weight: 600; }
.menu { position: absolute; left: 16px; bottom: 64px; width: 220px; background: var(--surface); border: 1px solid var(--border); border-radius: 12px; box-shadow: 0 8px 24px rgba(28,28,26,.10); padding: 6px; display: flex; flex-direction: column; z-index: 5; }
.menu button { border: 0; background: transparent; text-align: left; padding: 8px 10px; border-radius: 8px; display: flex; align-items: center; gap: 10px; }
.menu button:hover, .menu button.on { background: var(--hover); }
.side-panel { flex: 1 1 280px; max-width: 340px; padding: 8px 20px; display: flex; flex-direction: column; }
.prop { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 14px 0; border-bottom: 1px solid #F1F0EC; }
.prop > span:first-child { color: var(--muted); }
.prop select, .prop input[type=date] { border: 1px solid var(--border); border-radius: 10px; padding: 6px 8px; background: var(--surface); max-width: 160px; }
.prop .val { font-weight: 500; display: inline-flex; align-items: center; gap: 8px; text-align: right; }
.status-btns { display: flex; flex-wrap: wrap; gap: 6px; }
.status-btns button { font-size: 13px; padding: 6px 12px; border-radius: 99px; border: 1px solid var(--border); background: var(--surface); color: var(--ink2); }
.status-btns button.on { background: var(--ink); border-color: var(--ink); color: #fff; }
.file { display: flex; align-items: center; gap: 8px; font-size: 13px; padding: 8px 10px; border: 1px solid var(--border); border-radius: 10px; text-decoration: none; }

/* clients */
.clients { display: flex; flex-wrap: wrap; gap: 24px; align-items: flex-start; }
.clients .list { flex: 1 1 380px; overflow: hidden; }
.clients .detail { flex: 1 1 360px; max-width: 520px; padding: 24px; display: flex; flex-direction: column; gap: 22px; }
.crow { display: flex; align-items: center; gap: 14px; padding: 14px 18px; border-bottom: 1px solid #F1F0EC; text-decoration: none; }
.crow:last-child { border-bottom: 0; }
.crow:hover, .crow.on { background: var(--sunk); }
.crow .logo { flex: none; width: 36px; height: 36px; border-radius: 12px; background: var(--hover); color: var(--ink2); display: flex; align-items: center; justify-content: center; font-weight: 600; font-size: 13px; }
.crow .grow { flex: 1; min-width: 0; display: flex; flex-direction: column; line-height: 1.35; }
.kv { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.kv div { display: flex; flex-direction: column; gap: 2px; overflow-wrap: anywhere; }
.mini { display: flex; align-items: center; gap: 10px; padding: 12px 14px; border: 1px solid var(--border); border-radius: 12px; text-decoration: none; }

/* login + modal + toast */
.login { min-height: 100vh; display: grid; place-items: center; padding: 16px; }
.login form { width: 100%; max-width: 380px; padding: 32px; display: flex; flex-direction: column; gap: 16px; }
.err { color: var(--danger); font-size: 13px; min-height: 18px; }
.modal-bg { position: fixed; inset: 0; background: rgba(28,28,26,.35); display: grid; place-items: center; padding: 16px; z-index: 20; }
.modal { width: 100%; max-width: 520px; max-height: 92vh; overflow: auto; padding: 24px; display: flex; flex-direction: column; gap: 16px; }
.modal .actions { display: flex; justify-content: flex-end; gap: 8px; }
#toast { position: fixed; left: 50%; bottom: 24px; transform: translateX(-50%); background: var(--ink); color: #fff; padding: 10px 16px; border-radius: 12px; opacity: 0; pointer-events: none; transition: opacity .2s; z-index: 30; }
#toast.show { opacity: 1; }
@media (max-width: 720px) { .side { flex-basis: 100%; flex-direction: row; align-items: center; padding: 12px 16px; gap: 12px; flex-wrap: wrap; border-right: 0; border-bottom: 1px solid var(--border); } .nav { flex-direction: row; flex-wrap: wrap; } .me { margin-top: 0; } .main { padding: 20px 16px; } .row2 { grid-template-columns: 1fr; } }