/* ==========================================================================
   bl0ck — design system: tokens, base elements, components, motion
   Theme colours (--bg, --card, --panel, --text, --muted, --accent,
   --accent-text, --border, --pattern) are injected per user in base.html.
   ========================================================================== */

:root {
  --surface-1: color-mix(in srgb, var(--card) 94%, transparent);
  --surface-2: color-mix(in srgb, var(--panel) 92%, transparent);
  --surface-3: color-mix(in srgb, var(--text) 6%, var(--panel));
  --hover: color-mix(in srgb, var(--text) 6%, transparent);
  --press: color-mix(in srgb, var(--text) 10%, transparent);
  --line: color-mix(in srgb, var(--text) 9%, transparent);
  --line-strong: color-mix(in srgb, var(--text) 16%, transparent);
  --accent-weak: color-mix(in srgb, var(--accent) 14%, transparent);
  --accent-mid: color-mix(in srgb, var(--accent) 32%, transparent);
  --success: #34d399;
  --danger: #f87171;
  --warning: #fbbf24;
  --online: #34d399;

  --r-xs: 8px;
  --r-sm: 11px;
  --r-md: 14px;
  --r-lg: 18px;
  --r-xl: 24px;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, .18), 0 2px 8px rgba(0, 0, 0, .12);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, .22);
  --shadow-lg: 0 24px 60px rgba(0, 0, 0, .38);
  --glow: 0 6px 22px color-mix(in srgb, var(--accent) 38%, transparent);
  --popover: linear-gradient(color-mix(in srgb, var(--panel) 96%, #000), color-mix(in srgb, var(--panel) 96%, #000)), var(--bg);

  --ease: cubic-bezier(.2, .8, .2, 1);
  --ease-out: cubic-bezier(.16, 1, .3, 1);
  --spring: cubic-bezier(.34, 1.56, .64, 1);
  --t-fast: .15s;
  --t: .25s;
  --t-slow: .45s;

  --font: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --nav-w: 76px;
  --tab-h: 64px;
  --safe-b: env(safe-area-inset-bottom, 0px);
}

/* ---------- reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; -webkit-tap-highlight-color: transparent; }
body {
  margin: 0;
  min-height: 100dvh;
  font: 15px/1.5 var(--font);
  font-feature-settings: "cv11", "ss01";
  letter-spacing: -.006em;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
body::before {
  content: "";
  position: fixed; inset: 0; z-index: 0;
  background-image: var(--pattern, none);
  pointer-events: none;
}
body::after {
  content: "";
  position: fixed; inset: 0; z-index: 0; pointer-events: none;
  background:
    radial-gradient(48vmax 36vmax at 0% 0%, color-mix(in srgb, var(--accent) 10%, transparent), transparent 70%),
    radial-gradient(40vmax 30vmax at 100% 100%, color-mix(in srgb, var(--accent) 7%, transparent), transparent 70%);
}
#theme-decor { position: fixed; inset: 0; z-index: 0; pointer-events: none; overflow: hidden; }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; text-underline-offset: 3px; }
button, input, select, textarea { font: inherit; color: inherit; }
button { cursor: pointer; }
img { max-width: 100%; display: block; }
h1, h2, h3, h4, p { margin: 0; }
h1 { font-size: 28px; line-height: 1.15; letter-spacing: -.03em; font-weight: 750; }
h2 { font-size: 20px; line-height: 1.25; letter-spacing: -.02em; font-weight: 700; }
h3 { font-size: 16px; line-height: 1.3; letter-spacing: -.01em; font-weight: 650; }
[hidden] { display: none !important; }
::selection { background: var(--accent-mid); }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; border-radius: 6px; }
* { scrollbar-width: thin; scrollbar-color: var(--line-strong) transparent; }
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-thumb { background: var(--line-strong); border-radius: 10px; border: 3px solid transparent; background-clip: padding-box; }

/* ---------- icons ---------- */
.i { width: 20px; height: 20px; flex: none; display: inline-block; vertical-align: middle; stroke-width: 2; }
.i-sm { width: 16px; height: 16px; }
.i-lg { width: 24px; height: 24px; }
.i-xl { width: 32px; height: 32px; }

/* ---------- text helpers ---------- */
.muted { color: var(--muted); }
.small { font-size: 13px; }
.tiny { font-size: 12px; }
.strong { font-weight: 650; }
.ellipsis { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; min-width: 0; }
.row { display: flex; align-items: center; gap: 12px; min-width: 0; }
.row.wrap { flex-wrap: wrap; }
.row.end { justify-content: flex-end; }
.col { display: flex; flex-direction: column; gap: 12px; min-width: 0; }
.grow { flex: 1; min-width: 0; }
.stack > * + * { margin-top: 14px; }
.center { text-align: center; }
.sr { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }

/* ---------- buttons ---------- */
.btn {
  --b-bg: var(--accent); --b-fg: var(--accent-text);
  position: relative; overflow: hidden;
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  min-height: 42px; padding: 0 18px;
  border: 1px solid transparent; border-radius: var(--r-md);
  background: var(--b-bg); color: var(--b-fg);
  font-weight: 650; font-size: 14px; line-height: 1; white-space: nowrap;
  box-shadow: var(--glow);
  transition: transform var(--t-fast) var(--ease), filter var(--t-fast), box-shadow var(--t), background var(--t);
  user-select: none;
}
.btn:hover { filter: brightness(1.08); text-decoration: none; }
.btn:active { transform: scale(.97); }
.btn[disabled], .btn.disabled { opacity: .45; pointer-events: none; box-shadow: none; }
.btn.secondary { --b-bg: var(--surface-3); --b-fg: var(--text); border-color: var(--line); box-shadow: none; }
.btn.secondary:hover { --b-bg: color-mix(in srgb, var(--text) 10%, var(--panel)); filter: none; }
.btn.ghost { --b-bg: transparent; --b-fg: var(--text); box-shadow: none; }
.btn.ghost:hover { --b-bg: var(--hover); filter: none; }
.btn.danger { --b-bg: var(--danger); --b-fg: #fff; box-shadow: 0 6px 22px rgba(248, 113, 113, .3); }
.btn.danger-soft { --b-bg: color-mix(in srgb, var(--danger) 14%, transparent); --b-fg: var(--danger); box-shadow: none; }
.btn.sm { min-height: 34px; padding: 0 12px; font-size: 13px; border-radius: var(--r-sm); gap: 6px; }
.btn.lg { min-height: 50px; padding: 0 24px; font-size: 15px; border-radius: var(--r-lg); }
.btn.block { width: 100%; }
.btn .i { width: 18px; height: 18px; }
.btn.sm .i { width: 16px; height: 16px; }
.ripple { position: absolute; border-radius: 50%; background: currentColor; opacity: .25; transform: scale(0); animation: ripple .6s var(--ease-out) forwards; pointer-events: none; }

.icon-btn {
  position: relative;
  width: 40px; height: 40px; flex: none;
  display: inline-grid; place-items: center;
  border: 0; border-radius: var(--r-md); background: transparent; color: var(--muted);
  transition: background var(--t-fast), color var(--t-fast), transform var(--t-fast) var(--ease);
}
.icon-btn:hover { background: var(--hover); color: var(--text); }
.icon-btn:active { transform: scale(.9); }
.icon-btn.on { color: var(--accent); background: var(--accent-weak); }
.icon-btn.sm { width: 32px; height: 32px; border-radius: var(--r-sm); }
.icon-btn.sm .i { width: 17px; height: 17px; }
.icon-btn.danger:hover { color: var(--danger); background: color-mix(in srgb, var(--danger) 12%, transparent); }

/* tooltips */
[data-tip] { position: relative; }
[data-tip]::after {
  content: attr(data-tip);
  position: absolute; left: calc(100% + 10px); top: 50%;
  transform: translate(-4px, -50%); opacity: 0; pointer-events: none;
  padding: 6px 10px; border-radius: var(--r-xs);
  background: var(--popover); color: var(--text);
  border: 1px solid var(--line); box-shadow: var(--shadow-md);
  font-size: 12px; font-weight: 600; white-space: nowrap; z-index: 50;
  transition: opacity var(--t-fast), transform var(--t-fast) var(--ease);
}
[data-tip]:hover::after { opacity: 1; transform: translate(0, -50%); transition-delay: .25s; }
[data-tip-pos="bottom"]::after { left: 50%; top: calc(100% + 8px); transform: translate(-50%, -4px); }
[data-tip-pos="bottom"]:hover::after { transform: translate(-50%, 0); }
@media (hover: none) { [data-tip]::after { display: none; } }

/* ---------- forms ---------- */
.field { display: block; margin-bottom: 16px; }
.field > .label { display: block; margin-bottom: 7px; font-size: 13px; font-weight: 600; color: var(--muted); }
.field .hint { margin-top: 6px; font-size: 12px; color: var(--muted); }
.input-wrap { position: relative; display: flex; align-items: center; }
.input-wrap > .i { position: absolute; left: 13px; color: var(--muted); pointer-events: none; width: 18px; height: 18px; transition: color var(--t-fast); }
.input-wrap:focus-within > .i { color: var(--accent); }
.input-wrap > .input { padding-left: 40px; }
.input-wrap > .icon-btn { position: absolute; right: 4px; width: 36px; height: 36px; }
.input, .select, textarea.input {
  width: 100%; min-height: 46px; padding: 11px 14px;
  border: 1px solid var(--line); border-radius: var(--r-md);
  background: color-mix(in srgb, var(--panel) 75%, transparent);
  color: var(--text); outline: none;
  transition: border-color var(--t-fast), box-shadow var(--t-fast), background var(--t-fast);
}
.input::placeholder, textarea.input::placeholder { color: color-mix(in srgb, var(--muted) 80%, transparent); }
.input:hover, .select:hover { border-color: var(--line-strong); }
.input:focus, .select:focus, textarea.input:focus { border-color: var(--accent); box-shadow: 0 0 0 4px var(--accent-weak); background: color-mix(in srgb, var(--panel) 90%, transparent); }
textarea.input { min-height: 96px; resize: vertical; line-height: 1.45; }
.select { appearance: none; padding-right: 36px; background-image: linear-gradient(45deg, transparent 50%, var(--muted) 50%), linear-gradient(135deg, var(--muted) 50%, transparent 50%); background-position: calc(100% - 18px) 50%, calc(100% - 13px) 50%; background-size: 5px 5px; background-repeat: no-repeat; }
.select.sm { min-height: 32px; padding: 4px 30px 4px 10px; font-size: 13px; border-radius: var(--r-sm); background-position: calc(100% - 15px) 50%, calc(100% - 10px) 50%; }
select option { background: var(--panel); color: var(--text); }
.input.sm { min-height: 34px; padding: 6px 10px; font-size: 13px; border-radius: var(--r-sm); }
.alert { display: flex; gap: 10px; align-items: flex-start; padding: 12px 14px; border-radius: var(--r-md); font-size: 14px; border: 1px solid; }
.alert .i { margin-top: 1px; width: 18px; height: 18px; }
.alert.error { color: var(--danger); background: color-mix(in srgb, var(--danger) 10%, transparent); border-color: color-mix(in srgb, var(--danger) 35%, transparent); }
.alert.info { color: var(--text); background: var(--accent-weak); border-color: var(--accent-mid); }

/* ---------- cards ---------- */
.card {
  position: relative;
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: var(--r-xl);
  background: var(--surface-1);
  box-shadow: var(--shadow-sm);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
}
.card-head { display: flex; align-items: center; gap: 12px; margin-bottom: 16px; }
.card-head .ico { width: 38px; height: 38px; border-radius: var(--r-sm); display: grid; place-items: center; background: var(--accent-weak); color: var(--accent); flex: none; }
.card-head .ico .i { width: 19px; height: 19px; }
.card-head p { color: var(--muted); font-size: 13px; margin-top: 2px; }
.card.lift { transition: transform var(--t) var(--ease), border-color var(--t), box-shadow var(--t); }
.card.lift:hover { transform: translateY(-3px); border-color: var(--accent-mid); box-shadow: var(--shadow-md); }
.card.danger { border-color: color-mix(in srgb, var(--danger) 30%, var(--line)); }
.divider { height: 1px; background: var(--line); margin: 18px 0; border: 0; }

/* ---------- chips / badges ---------- */
.chip {
  display: inline-flex; align-items: center; gap: 6px;
  height: 28px; padding: 0 11px; border-radius: 999px;
  font-size: 12.5px; font-weight: 600; white-space: nowrap;
  background: var(--surface-3); border: 1px solid var(--line); color: var(--text);
}
.chip .i { width: 14px; height: 14px; }
.chip.accent { background: var(--accent-weak); border-color: var(--accent-mid); color: var(--accent); }
.chip.success { background: color-mix(in srgb, var(--success) 12%, transparent); border-color: color-mix(in srgb, var(--success) 35%, transparent); color: var(--success); }
.chip.danger { background: color-mix(in srgb, var(--danger) 12%, transparent); border-color: color-mix(in srgb, var(--danger) 35%, transparent); color: var(--danger); }
.count {
  min-width: 20px; height: 20px; padding: 0 6px; border-radius: 10px;
  display: inline-grid; place-items: center;
  font-size: 11.5px; font-weight: 700; font-variant-numeric: tabular-nums;
  background: var(--accent); color: var(--accent-text);
}
.count.bump { animation: bump .35s var(--spring); }
.verified { color: #4aa3ff; width: 17px; height: 17px; flex: none; }
.verified .i { width: 100%; height: 100%; }
.tag-admin { height: 18px; padding: 0 6px; border-radius: 6px; font-size: 10px; font-weight: 800; letter-spacing: .06em; display: inline-grid; place-items: center; background: var(--accent); color: var(--accent-text); }
.name-line { display: inline-flex; align-items: center; gap: 5px; min-width: 0; }
.name-line .nm { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.uname { --c: var(--muted); display: inline-flex; align-items: center; gap: 8px; height: 34px; padding: 0 12px; border-radius: var(--r-sm); border: 1px solid color-mix(in srgb, var(--c) 45%, transparent); background: color-mix(in srgb, var(--c) 12%, transparent); font-weight: 650; font-size: 14px; }
.uname small { color: var(--c); font-size: 11px; font-weight: 700; text-transform: uppercase; letter-spacing: .04em; }
.uname .i { color: var(--c); width: 15px; height: 15px; }

/* ---------- avatars ---------- */
.av {
  --s: 44px;
  position: relative; flex: none;
  width: var(--s); height: var(--s); border-radius: 50%;
  display: grid; place-items: center;
  background: linear-gradient(140deg, hsl(var(--h, 260) 70% 62%), hsl(calc(var(--h, 260) + 40) 65% 45%));
  color: #fff; font-weight: 700; font-size: calc(var(--s) * .4); text-transform: uppercase;
  user-select: none;
}
.av img { width: 100%; height: 100%; object-fit: cover; border-radius: 50%; }
.av .dot {
  position: absolute; right: 0; bottom: 0;
  width: max(10px, calc(var(--s) * .26)); height: max(10px, calc(var(--s) * .26));
  border-radius: 50%; background: var(--online);
  box-shadow: 0 0 0 max(2px, calc(var(--s) * .05)) var(--bg);
  transform: scale(0); transition: transform var(--t) var(--spring);
}
.av.online .dot { transform: scale(1); }
.status { font-size: 13px; color: var(--muted); }
.status.online { color: var(--online); }
.status.typing { color: var(--accent); }

/* ---------- toasts ---------- */
#toasts { position: fixed; z-index: 1000; top: 16px; right: 16px; display: flex; flex-direction: column; gap: 10px; width: min(380px, calc(100vw - 32px)); pointer-events: none; }
.toast {
  pointer-events: auto;
  display: flex; align-items: flex-start; gap: 10px;
  padding: 12px 14px; border-radius: var(--r-md);
  background: var(--popover); color: var(--text);
  border: 1px solid var(--line); box-shadow: var(--shadow-lg);
  font-size: 14px; line-height: 1.4;
  animation: toast-in .45s var(--spring);
}
.toast .i { width: 19px; height: 19px; margin-top: 1px; color: var(--accent); }
.toast.success .i { color: var(--success); }
.toast.error .i { color: var(--danger); }
.toast.out { animation: toast-out .25s var(--ease) forwards; }

/* ---------- modal / sheet ---------- */
.overlay { position: fixed; inset: 0; z-index: 900; display: grid; place-items: center; padding: 20px; background: rgba(0, 0, 0, .55); backdrop-filter: blur(6px); animation: fade-in .2s ease; }
.overlay.out { animation: fade-out .2s ease forwards; }
.dialog { width: 100%; max-width: 420px; padding: 24px; border-radius: var(--r-xl); background: var(--popover); border: 1px solid var(--line); box-shadow: var(--shadow-lg); animation: pop-in .35s var(--spring); }
.overlay.out .dialog { animation: pop-out .2s var(--ease) forwards; }
.dialog .ico { width: 48px; height: 48px; border-radius: 16px; display: grid; place-items: center; background: var(--accent-weak); color: var(--accent); margin-bottom: 14px; }
.dialog.danger .ico { background: color-mix(in srgb, var(--danger) 14%, transparent); color: var(--danger); }
.dialog p { color: var(--muted); margin: 6px 0 20px; }
@media (max-width: 767px) {
  .overlay { place-items: end center; padding: 0; }
  .dialog { max-width: none; border-radius: var(--r-xl) var(--r-xl) 0 0; padding-bottom: calc(24px + var(--safe-b)); animation: sheet-in .4s var(--ease-out); }
  .overlay.out .dialog { animation: sheet-out .25s var(--ease) forwards; }
}

/* ---------- skeleton / spinner / empty ---------- */
.skeleton { border-radius: var(--r-md); background: linear-gradient(90deg, var(--hover) 0%, var(--press) 50%, var(--hover) 100%); background-size: 200% 100%; animation: shimmer 1.4s linear infinite; }
.spinner { width: 22px; height: 22px; border-radius: 50%; border: 2.5px solid var(--line-strong); border-top-color: var(--accent); animation: spin .7s linear infinite; }
.empty { display: grid; justify-items: center; gap: 8px; text-align: center; padding: 40px 20px; color: var(--muted); }
.empty .ico { width: 72px; height: 72px; border-radius: 24px; display: grid; place-items: center; background: var(--accent-weak); color: var(--accent); margin-bottom: 8px; animation: float 5s ease-in-out infinite; }
.empty .ico .i { width: 32px; height: 32px; }
.empty h3 { color: var(--text); }

/* ---------- segmented tabs ---------- */
.segmented { position: relative; display: inline-flex; padding: 4px; gap: 2px; border-radius: var(--r-md); background: var(--surface-2); border: 1px solid var(--line); max-width: 100%; overflow-x: auto; scrollbar-width: none; }
.segmented::-webkit-scrollbar { display: none; }
.segmented button { position: relative; z-index: 1; display: inline-flex; align-items: center; gap: 7px; height: 36px; padding: 0 14px; border: 0; border-radius: var(--r-sm); background: none; color: var(--muted); font-weight: 600; font-size: 14px; white-space: nowrap; transition: color var(--t); }
.segmented button .i { width: 17px; height: 17px; }
.segmented button.on { color: var(--accent-text); }
.segmented .thumb { position: absolute; z-index: 0; top: 4px; bottom: 4px; left: 0; width: 0; border-radius: var(--r-sm); background: var(--accent); box-shadow: var(--glow); transition: transform var(--t-slow) var(--ease-out), width var(--t-slow) var(--ease-out); }

/* ---------- motion ---------- */
@keyframes fade-in { from { opacity: 0; } }
@keyframes fade-out { to { opacity: 0; } }
@keyframes rise { from { opacity: 0; transform: translateY(16px); } }
@keyframes pop-in { from { opacity: 0; transform: scale(.9) translateY(8px); } }
@keyframes pop-out { to { opacity: 0; transform: scale(.95); } }
@keyframes sheet-in { from { transform: translateY(100%); } }
@keyframes sheet-out { to { transform: translateY(100%); } }
@keyframes toast-in { from { opacity: 0; transform: translateY(-12px) scale(.96); } }
@keyframes toast-out { to { opacity: 0; transform: translateX(24px); } }
@keyframes ripple { to { transform: scale(2.6); opacity: 0; } }
@keyframes bump { 50% { transform: scale(1.3); } }
@keyframes spin { to { transform: rotate(360deg); } }
@keyframes shimmer { to { background-position: -200% 0; } }
@keyframes float { 50% { transform: translateY(-8px); } }
@keyframes pulse-ring { from { box-shadow: 0 0 0 0 var(--accent-mid); } to { box-shadow: 0 0 0 14px transparent; } }
.reveal { animation: rise .6s var(--ease-out) both; animation-delay: calc(var(--i, 0) * 60ms); }


@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; scroll-behavior: auto !important; }
}