/* ==========================================================================================
   announcement.css — 公告 panel (js/ui/announcement.js): the official-style maintenance notice frame —
   title bar (title + release date + version), category tabs, a scrolling numbered body, footer with
   the current category, tab dots and the count. Same design language as guide.css (brackets, mint, clip-path tabs).
   ========================================================================================== */

.ann {
  position: fixed; inset: 0; z-index: calc(var(--z-modal) + 4);
  display: grid; place-items: center;
  background: radial-gradient(ellipse at 50% 40%, rgba(8, 14, 12, .82), rgba(2, 4, 3, .94));
  -webkit-backdrop-filter: blur(3px); backdrop-filter: blur(3px);
  animation: ann-fade 180ms var(--ease-out);
}
@keyframes ann-fade { from { opacity: 0; } }

.ann__box {
  --bk-c: var(--mint-500);
  position: relative; display: flex; flex-direction: column; gap: .12rem;
  /* a fixed frame, like the official notice window: the box does not grow and shrink as the category changes —
     a short category leaves the frame the same size, a long one scrolls inside .ann__body */
  width: min(96vw, 10.4rem); height: min(7.2rem, calc(100vh - 1.6rem));
  padding: .16rem .22rem .14rem;
  background: linear-gradient(180deg, rgba(22, 28, 26, .98), rgba(10, 13, 12, .98));
  border: 1px solid var(--line-2);
  box-shadow: 0 .2rem .6rem rgba(0, 0, 0, .7), 0 0 0 1px rgba(78, 216, 175, .06) inset;
  outline: none;
  animation: ann-pop 220ms var(--ease-out);
}
@keyframes ann-pop { from { opacity: 0; transform: translateY(.12rem) scale(.985); } }

/* header: titles | category tabs | close */
.ann__head { display: flex; align-items: flex-start; gap: .3rem; }
.ann__titles { display: flex; flex-direction: column; gap: .02rem; min-width: 2.6rem; flex: none; }
.ann__title { margin: 0; font-size: .3rem; font-weight: 900; letter-spacing: .12em; color: var(--text-hi); line-height: 1.1; }
.ann__meta { margin: .02rem 0 0; font-size: .15rem; letter-spacing: .08em; color: var(--text-lo); }
.ann__tabs { display: flex; gap: .06rem; margin: 0 auto; flex-wrap: wrap; }
.ann__tab {
  position: relative; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: .01rem;
  min-width: 1.4rem; height: .56rem; padding: 0 .2rem;
  background: rgba(255, 255, 255, .03); border: 1px solid var(--line); color: var(--text-lo);
  clip-path: polygon(.12rem 0, 100% 0, calc(100% - .12rem) 100%, 0 100%);
  transition: color var(--t-fast), background var(--t-fast), border-color var(--t-fast);
}
.ann__tab:hover { color: var(--text-hi); background: rgba(78, 216, 175, .06); }
.ann__tab.is-on { color: var(--text-on-mint); background: var(--mint-500); border-color: var(--mint-500); }
.ann__tabname { font-size: .19rem; font-weight: 700; letter-spacing: .1em; }
.ann__tabmicro { font-family: var(--font-display); font-size: .1rem; letter-spacing: .24em; opacity: .75; }
.ann__close {
  width: .56rem; height: .56rem; display: grid; place-items: center; flex: none;
  background: rgba(0, 0, 0, .35); border: 1px solid var(--line-2); color: var(--text-md);
  transition: color var(--t-fast), border-color var(--t-fast), background var(--t-fast);
}
.ann__close .icon { width: .3rem; height: .3rem; }
.ann__close:hover { color: var(--text-hi); border-color: var(--red-premium); background: var(--red-a20); }

/* body: a scrolling notice list */
.ann__body { flex: 1 1 auto; min-height: 0; overflow: auto; padding: .12rem .06rem .12rem .02rem; }
.ann__lead { margin: 0 0 .12rem; font-size: .19rem; line-height: 1.75; color: var(--text-md); letter-spacing: .02em; }
.ann__note {
  margin: 0 0 .14rem; padding: .08rem .12rem; font-size: .17rem; line-height: 1.6;
  color: var(--mint-400); border-left: 2px solid var(--mint-500); background: var(--mint-a10);
}
.ann__list { margin: 0; padding: 0; list-style: none; display: flex; flex-direction: column; gap: .12rem; counter-reset: ann-item; }
.ann__item { display: flex; flex-direction: column; gap: .03rem; padding-left: .34rem; position: relative; }
.ann__item::before {
  content: counter(ann-item, decimal-leading-zero); counter-increment: ann-item;
  position: absolute; left: 0; top: .02rem; font-family: var(--font-num); font-size: .15rem; color: var(--mint-500);
}
.ann__itemhead { font-size: .2rem; font-weight: 700; letter-spacing: .06em; color: var(--text-hi); }
.ann__itemtext { font-size: .18rem; line-height: 1.7; color: var(--text-md); }
.ann__empty { margin: .2rem 0 0; text-align: center; font-size: .2rem; }

/* footer: category tag | dots | count */
.ann__foot { display: grid; grid-template-columns: 1fr auto 1fr; align-items: center; gap: .3rem; min-height: .4rem; }
.ann__tag {
  justify-self: start; padding: .02rem .12rem; font-size: .14rem; font-weight: 700; letter-spacing: .1em;
  color: var(--mint-400); border: 1px solid var(--mint-800); background: var(--mint-a10);
}
.ann__dots { display: flex; align-items: center; gap: .05rem; }
.ann__dot { width: .2rem; height: .08rem; padding: 0; border: 0; background: var(--line-2); transition: background var(--t-fast), width var(--t-fast); }
.ann__dot:hover { background: var(--line-3); }
.ann__dot.is-on { width: .42rem; background: var(--mint-500); box-shadow: 0 0 .08rem rgba(23, 249, 183, .5); }
.ann__count { justify-self: end; font-size: .22rem; color: var(--text-md); letter-spacing: .06em; }

/* standard trigger + unread dot */
.ann-btn-wrap { position: relative; display: inline-flex; }
.ann-btn .btn__icon { color: var(--mint-500); }
.ann-btn__dot {
  position: absolute; top: .04rem; right: .04rem; width: .12rem; height: .12rem; pointer-events: none;
  background: var(--red-premium); box-shadow: 0 0 .08rem rgba(255, 71, 87, .7);
}

@media (max-height: 560px) {
  .ann__box { padding: .08rem .12rem; gap: .06rem; }
  .ann__titles { min-width: 0; }
  .ann__meta { display: none; }
}