/* Sasana — оформление. Без библиотек: переменные, флексы, немного грид-сетки.
   Светлая и тёмная тема берутся из системной настройки (раздел 7 ТЗ). */

:root {
  --bg: #f6f7f9;
  --panel: #ffffff;
  --panel-2: #fbfbfc;
  --border: #e3e6ea;
  --text: #1d2128;
  --muted: #6b7280;
  --accent: #2f6fed;
  --accent-soft: #e8f0fe;
  --danger: #d23b3b;
  --danger-soft: #fdecec;
  --ok: #1f9254;
  --warn: #b45309;
  --shadow: 0 1px 2px rgba(16, 24, 40, .06), 0 8px 24px rgba(16, 24, 40, .08);
  --radius: 10px;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #14171c;
    --panel: #1b1f26;
    --panel-2: #20252d;
    --border: #2c323c;
    --text: #e8eaee;
    --muted: #9aa3b2;
    --accent: #6ea0ff;
    --accent-soft: #1f2a3f;
    --danger: #f07171;
    --danger-soft: #3a2222;
    --ok: #59c98a;
    --warn: #e3a008;
    --shadow: 0 1px 2px rgba(0, 0, 0, .4), 0 12px 28px rgba(0, 0, 0, .35);
    color-scheme: dark;
  }
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  height: 100%;
  background: var(--bg);
  color: var(--text);
  font: 15px/1.45 -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

button, input, textarea, select { font: inherit; color: inherit; }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

/* --- каркас --------------------------------------------------------- */

.layout { display: flex; min-height: 100vh; }

.sidebar {
  width: 248px;
  flex: 0 0 248px;
  background: var(--panel);
  border-right: 1px solid var(--border);
  padding: 14px 12px;
  display: flex;
  flex-direction: column;
  gap: 4px;
  position: sticky;
  top: 0;
  height: 100vh;
  overflow-y: auto;
}

.brand {
  display: flex; align-items: center; gap: 8px;
  font-weight: 650; font-size: 17px; letter-spacing: .2px;
  padding: 6px 8px 14px;
}
.brand .dot { width: 10px; height: 10px; border-radius: 50%; background: var(--accent); }

.nav-item {
  display: flex; align-items: center; gap: 8px;
  padding: 8px 10px; border-radius: 8px; cursor: pointer;
  color: var(--text); border: 0; background: none; width: 100%; text-align: left;
}
.nav-item:hover { background: var(--panel-2); text-decoration: none; }
.nav-item.active { background: var(--accent-soft); color: var(--accent); font-weight: 600; }
.nav-item .count { margin-left: auto; color: var(--muted); font-size: 13px; }
.nav-item.active .count { color: var(--accent); }
.nav-section { margin-top: 14px; padding: 4px 10px; font-size: 12px; text-transform: uppercase;
  letter-spacing: .6px; color: var(--muted); display: flex; align-items: center; }
.nav-section button { margin-left: auto; }

.main { flex: 1 1 auto; min-width: 0; display: flex; flex-direction: column; }

.topbar {
  display: flex; align-items: center; gap: 10px;
  padding: 12px 18px; border-bottom: 1px solid var(--border);
  background: var(--panel); position: sticky; top: 0; z-index: 5;
}
.topbar h1 { font-size: 17px; margin: 0; font-weight: 640; }
.topbar .spacer { flex: 1; }

.content { padding: 16px 18px 60px; max-width: 1080px; width: 100%; }

/* --- элементы ------------------------------------------------------- */

.btn {
  border: 1px solid var(--border); background: var(--panel); color: var(--text);
  padding: 7px 12px; border-radius: 8px; cursor: pointer;
}
.btn:hover { background: var(--panel-2); }
.btn.primary { background: var(--accent); border-color: var(--accent); color: #fff; }
.btn.primary:hover { filter: brightness(1.05); }
.btn.ghost { border-color: transparent; background: none; color: var(--muted); }
.btn.ghost:hover { background: var(--panel-2); color: var(--text); }
.btn.danger { color: var(--danger); border-color: var(--border); }
.btn.danger:hover { background: var(--danger-soft); }
.btn:disabled { opacity: .55; cursor: default; }
.btn.small { padding: 4px 8px; font-size: 13px; }

.input, .select, textarea.input {
  width: 100%; padding: 8px 10px; border-radius: 8px;
  border: 1px solid var(--border); background: var(--panel); color: var(--text);
}
.input:focus, .select:focus, textarea.input:focus {
  outline: 2px solid var(--accent-soft); border-color: var(--accent);
}
textarea.input { resize: vertical; min-height: 84px; font-family: inherit; }

.badge {
  display: inline-flex; align-items: center; gap: 5px;
  padding: 2px 8px; border-radius: 999px; font-size: 12px;
  background: var(--panel-2); border: 1px solid var(--border); color: var(--muted);
}
.badge.new { color: var(--accent); border-color: var(--accent-soft); background: var(--accent-soft); }
.badge.in_progress { color: var(--warn); }
.badge.done { color: var(--ok); }
.badge.overdue { color: var(--danger); background: var(--danger-soft); border-color: var(--danger-soft); }

.avatar {
  width: 26px; height: 26px; border-radius: 50%; flex: 0 0 26px;
  background: var(--accent-soft); color: var(--accent);
  display: inline-flex; align-items: center; justify-content: center;
  font-size: 11px; font-weight: 650; overflow: hidden;
}
.avatar img { width: 100%; height: 100%; object-fit: cover; }
.avatar.lg { width: 44px; height: 44px; flex-basis: 44px; font-size: 15px; }

/* --- список задач ---------------------------------------------------- */

.filters { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 12px; align-items: center; }
.filters .select, .filters .input { width: auto; min-width: 140px; }
.filters .search { flex: 1 1 220px; min-width: 160px; }

.quick-create { display: flex; gap: 8px; margin-bottom: 12px; }
.quick-create .input { flex: 1; }

.task-list { background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius);
  overflow: hidden; box-shadow: var(--shadow); }
.task-row {
  display: flex; align-items: center; gap: 10px; padding: 10px 14px;
  border-bottom: 1px solid var(--border); cursor: pointer; background: none; width: 100%;
  text-align: left; border-left: 0; border-right: 0; border-top: 0; color: var(--text);
}
.task-row:last-child { border-bottom: 0; }
.task-row:hover { background: var(--panel-2); }
.task-row.selected { background: var(--accent-soft); }
.task-row .title { flex: 1 1 auto; min-width: 0; overflow: hidden; text-overflow: ellipsis;
  white-space: nowrap; }
.task-row.done .title { color: var(--muted); text-decoration: line-through; }
.task-row .meta { display: flex; align-items: center; gap: 10px; color: var(--muted); font-size: 13px; }
.task-row .due.overdue { color: var(--danger); font-weight: 600; }
.check {
  width: 18px; height: 18px; flex: 0 0 18px; border-radius: 50%;
  border: 1.5px solid var(--border); background: none; cursor: pointer; padding: 0;
  display: inline-flex; align-items: center; justify-content: center; color: transparent;
}
.check:hover { border-color: var(--ok); color: var(--ok); }
.check.on { background: var(--ok); border-color: var(--ok); color: #fff; }

.empty { padding: 42px 16px; text-align: center; color: var(--muted); }
.empty h3 { margin: 0 0 6px; color: var(--text); font-size: 16px; }

/* --- карточка задачи -------------------------------------------------- */

.overlay { position: fixed; inset: 0; background: rgba(12, 16, 22, .35); z-index: 20; }
.panel {
  position: fixed; top: 0; right: 0; bottom: 0; width: min(560px, 100vw);
  background: var(--panel); border-left: 1px solid var(--border); z-index: 21;
  display: flex; flex-direction: column; box-shadow: var(--shadow);
}
.panel-head { display: flex; align-items: flex-start; gap: 8px; padding: 14px 16px;
  border-bottom: 1px solid var(--border); }
.panel-body { overflow-y: auto; padding: 14px 16px 30px; flex: 1; }
.panel h2 { font-size: 18px; margin: 0; flex: 1; font-weight: 640; }
.panel h2[contenteditable="true"]:focus { outline: 2px solid var(--accent-soft); border-radius: 6px; }

.fields { display: grid; grid-template-columns: 120px 1fr; gap: 8px 12px; align-items: center;
  margin-bottom: 16px; }
.fields label { color: var(--muted); font-size: 13px; }

.section-title { font-size: 13px; color: var(--muted); text-transform: uppercase;
  letter-spacing: .5px; margin: 18px 0 8px; display: flex; align-items: center; gap: 8px; }
.section-title button { margin-left: auto; }

.md { line-height: 1.55; word-wrap: break-word; }
.md p { margin: 0 0 8px; }
.md ul, .md ol { margin: 0 0 8px; padding-left: 22px; }
.md code { background: var(--panel-2); padding: 1px 5px; border-radius: 5px; font-size: 13px; }
.md a { word-break: break-all; }
.md .mention { color: var(--accent); font-weight: 600; }

.comment { display: flex; gap: 10px; padding: 10px 0; border-bottom: 1px solid var(--border); }
.comment:last-child { border-bottom: 0; }
.comment .who { font-weight: 600; font-size: 14px; }
.comment .when { color: var(--muted); font-size: 12px; margin-left: 6px; }
.comment .body { margin-top: 3px; }
.comment .actions { display: flex; gap: 6px; margin-top: 4px; }

.composer { border-top: 1px solid var(--border); padding: 10px 16px; background: var(--panel-2); }
.composer .row { display: flex; gap: 8px; align-items: center; margin-top: 8px; }
.composer .hint { color: var(--muted); font-size: 12px; margin-left: auto; }
.dropzone.over { outline: 2px dashed var(--accent); outline-offset: -6px; border-radius: 8px; }

.files { display: flex; flex-wrap: wrap; gap: 8px; }
.file {
  display: flex; align-items: center; gap: 8px; padding: 6px 8px; border-radius: 8px;
  border: 1px solid var(--border); background: var(--panel-2); font-size: 13px; max-width: 100%;
}
.file .name { max-width: 210px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.file .size { color: var(--muted); font-size: 12px; }
.thumb { width: 96px; height: 96px; border-radius: 8px; object-fit: cover; border: 1px solid var(--border);
  cursor: pointer; background: var(--panel-2); }

.events { font-size: 13px; color: var(--muted); }
.events li { margin-bottom: 4px; }

/* --- уведомления, админка, профиль ------------------------------------ */

.card { background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 16px; box-shadow: var(--shadow); margin-bottom: 14px; }
.card h3 { margin: 0 0 12px; font-size: 15px; }

.notif { display: flex; gap: 10px; padding: 10px 12px; border-bottom: 1px solid var(--border);
  cursor: pointer; align-items: flex-start; }
.notif:last-child { border-bottom: 0; }
.notif.unread { background: var(--accent-soft); }
.notif .when { color: var(--muted); font-size: 12px; }

table.grid { width: 100%; border-collapse: collapse; }
table.grid th, table.grid td { text-align: left; padding: 8px 10px; border-bottom: 1px solid var(--border);
  font-size: 14px; }
table.grid th { color: var(--muted); font-weight: 600; font-size: 12px; text-transform: uppercase; }

.bell { position: relative; }
.bell .dot { position: absolute; top: 0; right: 0; min-width: 16px; height: 16px; padding: 0 4px;
  border-radius: 999px; background: var(--danger); color: #fff; font-size: 11px; line-height: 16px;
  text-align: center; }

.chips { display: flex; flex-wrap: wrap; gap: 6px; }
.chip { display: inline-flex; align-items: center; gap: 6px; padding: 3px 8px; border-radius: 999px;
  background: var(--panel-2); border: 1px solid var(--border); font-size: 13px; }
.chip button { border: 0; background: none; color: var(--muted); cursor: pointer; padding: 0 2px; }

/* --- вход ------------------------------------------------------------- */

.auth-screen { min-height: 100vh; display: flex; align-items: center; justify-content: center;
  padding: 20px; }
.auth-box { width: min(380px, 100%); background: var(--panel); border: 1px solid var(--border);
  border-radius: 14px; padding: 24px; box-shadow: var(--shadow); }
.auth-box h1 { margin: 0 0 4px; font-size: 22px; }
.auth-box p.sub { margin: 0 0 18px; color: var(--muted); font-size: 14px; }
.auth-box label { display: block; margin: 10px 0 4px; font-size: 13px; color: var(--muted); }

.error-text { color: var(--danger); font-size: 13px; margin-top: 10px; }
.ok-text { color: var(--ok); font-size: 13px; margin-top: 10px; }

/* --- всплывающие сообщения ------------------------------------------- */

.toasts { position: fixed; bottom: 16px; left: 50%; transform: translateX(-50%); z-index: 40;
  display: flex; flex-direction: column; gap: 8px; align-items: center; }
.toast { background: var(--panel); border: 1px solid var(--border); border-radius: 8px;
  padding: 8px 14px; box-shadow: var(--shadow); font-size: 14px; max-width: 90vw; }
.toast.error { border-color: var(--danger); color: var(--danger); }

/* --- подсказка упоминаний -------------------------------------------- */

.mention-menu { position: absolute; z-index: 30; background: var(--panel); border: 1px solid var(--border);
  border-radius: 8px; box-shadow: var(--shadow); overflow: hidden; min-width: 200px; }
.mention-menu button { display: flex; gap: 8px; align-items: center; width: 100%; border: 0;
  background: none; padding: 7px 10px; cursor: pointer; text-align: left; }
.mention-menu button:hover, .mention-menu button.active { background: var(--accent-soft); }

/* --- телефон ---------------------------------------------------------- */

.menu-toggle { display: none; }

@media (max-width: 760px) {
  .sidebar { position: fixed; left: 0; top: 0; bottom: 0; z-index: 30; transform: translateX(-100%);
    transition: transform .18s ease; }
  .sidebar.open { transform: translateX(0); }
  .menu-toggle { display: inline-flex; }
  .content { padding: 12px 12px 60px; }
  .panel { width: 100vw; border-left: 0; }
  .fields { grid-template-columns: 1fr; gap: 4px; }
  .fields label { margin-top: 8px; }
  .task-row .meta .group-name { display: none; }
}

@media (max-width: 380px) {
  .topbar { padding: 10px 12px; }
  .task-row { padding: 9px 10px; }
  .task-row .meta .comments-count { display: none; }
}