/* «Серебряные нити» — помощник «Нить» (assistant.js). Наш файл, на токенах дизайн-системы. */
.sn-ai { position: fixed; right: 20px; bottom: 20px; z-index: 60; font-family: var(--font-text); color: var(--sn-text); }

/* Кнопка */
.sn-ai__fab { position: relative; display: flex; align-items: center; gap: 12px; height: 64px; padding: 0 22px 0 6px; border: 1px solid var(--sn-border-control); border-radius: 999px; background: var(--sn-bg); color: var(--sn-heading); cursor: pointer; box-shadow: 0 8px 28px rgba(7, 18, 63, .18); transition: transform .2s ease, box-shadow .2s ease, background .2s; font: 500 15px/20px var(--font-text); }
.sn-ai__fab:hover { transform: translateY(-2px); box-shadow: 0 12px 32px rgba(7, 18, 63, .22); }
.sn-ai__fab:focus-visible { outline: 2px solid var(--sn-focus); outline-offset: 3px; }
.sn-ai__fab .sn-sphere { width: 52px; height: 52px; animation: sn-rotate 40s linear infinite; }
.sn-ai__fab .sn-t { stroke-width: 1.2px; }
.sn-ai__ring { position: absolute; left: 2px; top: 2px; width: 60px; height: 60px; border-radius: 50%; border: 1px solid var(--sn-thread); opacity: 0; pointer-events: none; }
.sn-ai--hint .sn-ai__ring { animation: sn-ai-ring 2.6s ease-out infinite; }
@keyframes sn-ai-ring { 0% { transform: scale(.9); opacity: .9; } 100% { transform: scale(1.7); opacity: 0; } }
.sn-ai--open .sn-ai__fab { display: none; }
[data-theme="blue"] .sn-ai__fab { background: var(--sn-surface); }

/* Окно */
.sn-ai__panel { position: absolute; right: 0; bottom: 0; width: 392px; max-height: min(680px, calc(100vh - 40px)); display: flex; flex-direction: column; background: var(--sn-bg); border: 1px solid var(--sn-line); border-radius: 12px; box-shadow: 0 24px 64px rgba(7, 18, 63, .24); overflow: hidden; animation: sn-ai-in .32s cubic-bezier(.2,.7,.2,1) both; }
.sn-ai__panel[hidden] { display: none; }
@keyframes sn-ai-in { from { opacity: 0; transform: translateY(16px) scale(.98); } to { opacity: 1; transform: none; } }
.sn-ai__head { display: flex; align-items: center; gap: 12px; padding: 14px 14px 14px 16px; background: var(--sn-surface-deep); color: var(--sn-on-deep); }
.sn-ai__head .sn-t { stroke: var(--sn-on-deep-muted); }
.sn-ai__head .sn-t--soft { stroke: var(--sn-on-deep-muted); opacity: .5; }
.sn-ai__head .sn-node { fill: var(--sn-surface-deep); stroke: var(--sn-on-deep); }
.sn-ai__avatar { flex: none; width: 40px; height: 40px; }
.sn-ai__title { margin: 0; font: 500 16px/20px var(--font-text); }
.sn-ai__sub { margin: 0; font: 400 12px/16px var(--font-text); color: var(--sn-on-deep-muted); }
.sn-ai__close { margin-left: auto; width: 36px; height: 36px; border: 0; border-radius: 50%; background: transparent; color: var(--sn-on-deep); cursor: pointer; display: grid; place-items: center; }
.sn-ai__close:hover { background: rgba(255,255,255,.12); }
.sn-ai__close:focus-visible { outline: 2px solid var(--sn-on-deep); outline-offset: 2px; }
.sn-ai__close .sn-ico, .sn-ai__send .sn-ico { width: 18px; height: 18px; fill: none; stroke: currentColor; stroke-width: 1.6; stroke-linecap: round; }

.sn-ai__list { flex: 1; overflow-y: auto; padding: 16px; display: flex; flex-direction: column; gap: 10px; background: var(--sn-surface); scroll-behavior: smooth; }
.sn-ai__msg { max-width: 88%; padding: 10px 14px; border-radius: 12px; font: 400 14.5px/21px var(--font-text); animation: sn-ai-msg .3s ease both; }
@keyframes sn-ai-msg { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: none; } }
.sn-ai__msg--bot { align-self: flex-start; background: var(--sn-bg); border: 1px solid var(--sn-line); border-bottom-left-radius: 4px; color: var(--sn-text); }
.sn-ai__msg--user { align-self: flex-end; background: var(--sn-brand); color: var(--sn-on-brand); border-bottom-right-radius: 4px; }
.sn-ai__msg a { color: var(--sn-link); }
.sn-ai__msg b { font-weight: 500; color: var(--sn-heading); }
.sn-ai__dot { color: var(--sn-thread); }
.sn-ai__typing { display: inline-flex; gap: 4px; padding: 4px 2px; }
.sn-ai__typing i { width: 6px; height: 6px; border-radius: 50%; background: var(--sn-thread); animation: sn-ai-dot 1s ease-in-out infinite; }
.sn-ai__typing i:nth-child(2) { animation-delay: .15s; } .sn-ai__typing i:nth-child(3) { animation-delay: .3s; }
@keyframes sn-ai-dot { 0%, 100% { opacity: .3; transform: translateY(0); } 50% { opacity: 1; transform: translateY(-3px); } }

.sn-ai__chips { display: flex; flex-wrap: wrap; gap: 6px; padding-top: 2px; }
.sn-ai__chip { border: 1px solid var(--sn-border-control); background: var(--sn-bg); color: var(--sn-link); font: 500 13px/18px var(--font-text); padding: 6px 12px; border-radius: 999px; cursor: pointer; transition: background .15s, color .15s, border-color .15s; }
.sn-ai__chip:hover { background: var(--sn-brand); color: var(--sn-on-brand); border-color: var(--sn-brand); }
.sn-ai__chip:focus-visible { outline: 2px solid var(--sn-focus); outline-offset: 2px; }

.sn-ai__form { display: flex; gap: 8px; padding: 12px 12px 8px; border-top: 1px solid var(--sn-line); background: var(--sn-bg); }
.sn-ai__input { flex: 1; min-width: 0; height: 44px; padding: 0 14px; border: 1px solid var(--sn-border-control); border-radius: var(--radius-sm); background: var(--sn-bg); color: var(--sn-text); font: 400 15px/20px var(--font-text); }
.sn-ai__input::placeholder { color: var(--sn-text-muted); }
.sn-ai__input:focus-visible { outline: 2px solid var(--sn-focus); outline-offset: 1px; }
.sn-ai__send { width: 44px; height: 44px; border: 0; border-radius: var(--radius-sm); background: var(--sn-brand); color: var(--sn-on-brand); cursor: pointer; display: grid; place-items: center; transition: background .15s, transform .15s; }
.sn-ai__send:hover { background: var(--sn-brand-hover); transform: translateY(-1px); }
.sn-ai__send:focus-visible { outline: 2px solid var(--sn-focus); outline-offset: 2px; }
.sn-ai__note { margin: 0; padding: 0 16px 10px; font: 400 11.5px/16px var(--font-text); color: var(--sn-text-muted); background: var(--sn-bg); }

/* Переключатель версий уходит влево, чтобы не спорить с помощником */
.sn-switcher { right: auto; left: 16px; }

@media (max-width: 767px) {
  .sn-ai { right: 12px; bottom: 12px; }
  .sn-ai__fab { height: 56px; padding-right: 16px; }
  .sn-ai__fab .sn-sphere { width: 46px; height: 46px; }
  .sn-ai__ring { width: 52px; height: 52px; }
  .sn-ai__panel { position: fixed; left: 0; right: 0; bottom: 0; width: auto; max-height: 88vh; border-radius: 12px 12px 0 0; }
  .sn-switcher { left: 12px; right: auto; bottom: 12px; max-width: calc(100% - 200px); }
  .sn-switcher button span:not(.sn-switcher__dot) { display: none; }
  .sn-switcher button { padding: 8px; }
  .sn-ai--open ~ .sn-switcher, .sn-ai--open + .sn-switcher { display: none; }
}
@media (prefers-reduced-motion: reduce) { .sn-ai__fab .sn-sphere, .sn-ai--hint .sn-ai__ring, .sn-ai__typing i { animation: none; } }