/* MK留言板 · 重金属未来科技 */

:root {
  --bg0: #07080c;
  --bg1: #10131a;
  --steel: #9aa3b2;
  --chrome: #e8edf5;
  --mute: #7d8798;
  --line: rgba(232, 237, 245, 0.12);
  --orange: #ff6a00;
  --lime: #c6ff3d;
  --cyan: #5ee7ff;
  --danger: #ff3b4a;
  --ok: #8dff6a;
  --panel: linear-gradient(160deg, rgba(28, 32, 42, 0.92), rgba(14, 16, 22, 0.96));
  --spring: cubic-bezier(0.34, 1.56, 0.64, 1);
  --soft: cubic-bezier(0.22, 1, 0.36, 1);
  --font-display: "Black Ops One", "Noto Sans SC", sans-serif;
  --font-ui: "Chakra Petch", "Noto Sans SC", sans-serif;
}

* { box-sizing: border-box; }
html, body {
  height: 100%;
  margin: 0;
  overflow: hidden;
}
body {
  color: var(--chrome);
  font: 15px/1.55 var(--font-ui);
  background: var(--bg0);
  overflow-x: hidden;
}

.app-shell {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  height: 100%;
}
.board-top {
  flex-shrink: 0;
  background: var(--bg0);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.22);
}
.board-scroll {
  flex: 1;
  min-height: 0;
  overflow-x: hidden;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
}
.stage-top {
  width: min(920px, calc(100% - 28px));
  margin: 0 auto;
  padding: 20px 0 12px;
}
.stage-feed {
  width: min(920px, calc(100% - 28px));
  margin: 0 auto;
  padding: 12px 0 48px;
}

.fx-grid {
  position: fixed; inset: 0; pointer-events: none; z-index: 0;
  background:
    linear-gradient(rgba(94, 231, 255, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(94, 231, 255, 0.04) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(ellipse at 50% 20%, #000 20%, transparent 75%);
}
.fx-scan {
  position: fixed; inset: 0; pointer-events: none; z-index: 0;
  background: repeating-linear-gradient(
    0deg,
    rgba(0,0,0,0.18) 0px,
    rgba(0,0,0,0.18) 1px,
    transparent 2px,
    transparent 4px
  );
  opacity: 0.25;
  animation: scanDrift 8s linear infinite;
}
.fx-vignette {
  position: fixed; inset: 0; pointer-events: none; z-index: 0;
  background:
    radial-gradient(900px 500px at 15% -10%, rgba(255, 106, 0, 0.18), transparent 55%),
    radial-gradient(700px 420px at 90% 0%, rgba(94, 231, 255, 0.12), transparent 50%),
    radial-gradient(circle at 50% 120%, rgba(198, 255, 61, 0.08), transparent 45%);
}

.stage {
  position: relative; z-index: 1;
  width: min(920px, calc(100% - 28px));
  margin: 0 auto;
  padding: 28px 0 64px;
}

.hero {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 18px;
  margin-bottom: 18px;
  animation: rise .7s var(--spring) both;
}
.brand-block { display: flex; gap: 16px; align-items: center; }
.mark {
  width: 72px; height: 72px; position: relative;
  display: grid; place-items: center;
  border-radius: 18px;
  background:
    linear-gradient(145deg, #2a3140, #0d1016);
  box-shadow:
    inset 0 1px 0 rgba(255,255,255,0.2),
    inset 0 -8px 18px rgba(0,0,0,0.55),
    0 12px 28px rgba(0,0,0,0.45);
  animation: metalPulse 3.2s ease-in-out infinite;
}
.mark-ring {
  position: absolute; inset: 8px;
  border: 2px solid transparent;
  border-radius: 14px;
  background:
    linear-gradient(#12151c, #12151c) padding-box,
    linear-gradient(135deg, var(--orange), var(--cyan), var(--lime)) border-box;
}
.mark-core {
  position: relative; z-index: 1;
  font-family: var(--font-display);
  font-size: 22px;
  letter-spacing: 1px;
  color: var(--chrome);
  text-shadow: 0 0 18px rgba(255, 106, 0, 0.45);
}
.eyebrow {
  margin: 0 0 4px;
  font-size: 11px;
  letter-spacing: 0.22em;
  color: var(--cyan);
  text-transform: uppercase;
}
h1 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(28px, 5vw, 42px);
  line-height: 1.05;
  letter-spacing: 1px;
  background: linear-gradient(180deg, #fff 10%, #b7c0d0 55%, #ff9a4a 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.tagline {
  margin: 8px 0 0;
  color: var(--mute);
  font-size: 13px;
}
.hero-actions { display: flex; gap: 8px; flex-wrap: wrap; align-items: center; }
.hero-actions .btn-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
}

.panel {
  position: relative;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 20px;
  padding: 16px 16px 18px;
  margin-bottom: 14px;
  box-shadow:
    inset 0 1px 0 rgba(255,255,255,0.06),
    0 18px 40px rgba(0,0,0,0.35);
  animation: rise .75s var(--spring) both;
  transition: transform .25s var(--spring), border-color .25s var(--soft);
  overflow: hidden;
}
.panel::before {
  content: "";
  position: absolute; left: 0; right: 0; top: 0; height: 2px;
  background: linear-gradient(90deg, transparent, var(--orange), var(--cyan), transparent);
  opacity: 0.75;
}
.panel:hover {
  transform: translateY(-3px) scale(1.005);
  border-color: rgba(94, 231, 255, 0.28);
}
.forge { animation-delay: .05s; }
.archive { animation-delay: .12s; }

.panel-head {
  display: flex; justify-content: space-between; align-items: center;
  margin-bottom: 12px;
}
.panel-head h2 {
  margin: 0;
  font-family: var(--font-display);
  font-size: 18px;
  letter-spacing: 1px;
}
.chip {
  font-size: 11px;
  letter-spacing: 0.14em;
  padding: 4px 8px;
  border-radius: 999px;
  color: #081018;
  background: linear-gradient(135deg, var(--lime), var(--cyan));
  box-shadow: 0 0 16px rgba(198, 255, 61, 0.25);
  animation: chipPop .5s var(--spring);
}
.chip.admin {
  background: linear-gradient(135deg, var(--orange), #ffb347);
  box-shadow: 0 0 16px rgba(255, 106, 0, 0.35);
}

.field { display: block; margin-bottom: 12px; }
.field > span {
  display: block;
  margin-bottom: 6px;
  color: var(--mute);
  font-size: 12px;
  letter-spacing: 0.06em;
}
input, textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 12px 14px;
  color: var(--chrome);
  font: inherit;
  background:
    linear-gradient(180deg, rgba(255,255,255,0.04), rgba(0,0,0,0.2)),
    #12151c;
  outline: none;
  transition: transform .2s var(--spring), box-shadow .25s var(--soft), border-color .2s;
}
textarea { min-height: 110px; resize: vertical; }
input:focus, textarea:focus {
  border-color: rgba(255, 106, 0, 0.55);
  box-shadow: 0 0 0 4px rgba(255, 106, 0, 0.12), 0 0 24px rgba(94, 231, 255, 0.08);
  transform: translateY(-1px) scale(1.01);
}
input::placeholder, textarea::placeholder { color: #5c6575; }

.composer-foot {
  display: flex; justify-content: space-between; align-items: center; gap: 10px;
}
.meter { color: var(--mute); font-size: 12px; }

.btn {
  border: 0;
  border-radius: 999px;
  padding: 10px 16px;
  font: 700 13px/1 var(--font-ui);
  letter-spacing: 0.06em;
  cursor: pointer;
  color: #0a0c10;
  transition: transform .2s var(--spring), box-shadow .2s var(--soft), filter .2s;
  will-change: transform;
}
.btn:hover { transform: translateY(-2px) scale(1.04); filter: brightness(1.08); }
.btn:active { transform: translateY(2px) scale(0.94); }
.btn.pulse { animation: tapPulse .42s var(--spring); }
.btn.fire {
  color: #140800;
  background: linear-gradient(135deg, #ff8a1f, var(--orange) 45%, #ff3d00);
  box-shadow: 0 10px 24px rgba(255, 106, 0, 0.35);
}
.btn.steel {
  color: #081018;
  background: linear-gradient(135deg, var(--cyan), #8af0ff);
  box-shadow: 0 10px 24px rgba(94, 231, 255, 0.28);
}
.btn.ghost {
  color: var(--chrome);
  background: rgba(255,255,255,0.06);
  border: 1px solid var(--line);
  box-shadow: none;
}
.btn.danger {
  color: #fff;
  background: linear-gradient(135deg, #ff6170, var(--danger));
  box-shadow: 0 10px 22px rgba(255, 59, 74, 0.28);
}
.btn.mini { padding: 8px 12px; font-size: 12px; }

.tip {
  margin: 0 0 12px;
  padding: 12px 14px;
  border-radius: 14px;
  font-size: 13px;
  border: 1px solid transparent;
  transform-origin: top center;
}
.tip.ok {
  display: block;
  color: var(--ok);
  background: rgba(141, 255, 106, 0.08);
  border-color: rgba(141, 255, 106, 0.25);
  animation: popIn .45s var(--spring);
}
.tip.bad {
  display: block;
  color: #ff8d96;
  background: rgba(255, 59, 74, 0.1);
  border-color: rgba(255, 59, 74, 0.28);
  animation: shake .4s var(--soft);
}

.feed { display: flex; flex-direction: column; gap: 12px; }
.item {
  position: relative;
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 14px;
  background: linear-gradient(160deg, rgba(255,255,255,0.04), rgba(0,0,0,0.25));
  transition: transform .22s var(--spring), box-shadow .22s var(--soft), border-color .2s;
  animation: rise .55s var(--spring) both;
}
.item:hover {
  transform: translateY(-3px) scale(1.015);
  border-color: rgba(255, 106, 0, 0.35);
  box-shadow: 0 14px 30px rgba(0,0,0,0.35);
}
.meta {
  display: flex; justify-content: space-between; gap: 10px;
  color: var(--mute); font-size: 12px; margin-bottom: 8px;
}
.meta b { color: var(--cyan); font-weight: 700; }
.content {
  white-space: pre-wrap;
  word-break: break-word;
  line-height: 1.6;
}
.content img.msg-img {
  display: block;
  max-width: min(100%, 420px);
  max-height: 280px;
  margin: 8px 0 4px;
  border-radius: 10px;
  border: 1px solid var(--line);
  object-fit: contain;
  background: #0d1016;
  cursor: zoom-in;
  transition: transform .2s var(--spring), box-shadow .2s var(--soft);
}
.content img.msg-img:hover {
  transform: scale(1.02);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.35);
}
.meta-left {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}
.floor-badge {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 999px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: #081018;
  background: linear-gradient(135deg, var(--cyan), #8af0ff);
}
.floor-badge.pinned-badge {
  color: #1a0c00;
  background: linear-gradient(135deg, #ffb347, var(--orange));
}
.floor-sub {
  font-size: 11px;
  color: var(--mute);
}
.item.pinned {
  border-color: rgba(255, 106, 0, 0.45);
  box-shadow: 0 0 0 1px rgba(255, 106, 0, 0.12), 0 12px 28px rgba(255, 106, 0, 0.08);
}
.img-lightbox {
  position: fixed;
  inset: 0;
  z-index: 90;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 24px;
}
.img-lightbox.open { display: flex; animation: rise .28s var(--spring); }
.img-lightbox-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(3, 4, 8, 0.88);
  backdrop-filter: blur(8px);
}
.img-lightbox-panel {
  position: relative;
  z-index: 1;
  max-width: min(96vw, 1200px);
  max-height: 92vh;
  padding: 12px;
  border-radius: 16px;
  border: 1px solid rgba(94, 231, 255, 0.25);
  background: linear-gradient(160deg, #1c2230, #0d1017);
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.55);
}
.img-lightbox-panel img {
  display: block;
  max-width: min(92vw, 1160px);
  max-height: calc(92vh - 48px);
  object-fit: contain;
  border-radius: 10px;
}
.img-lightbox-close {
  position: absolute;
  top: 8px;
  right: 8px;
  width: 34px;
  height: 34px;
  border: 0;
  border-radius: 50%;
  font-size: 22px;
  line-height: 1;
  cursor: pointer;
  color: #fff;
  background: rgba(0, 0, 0, 0.45);
}
.replies { margin-top: 10px; padding-top: 10px; border-top: 1px dashed rgba(255,255,255,0.1); }
.reply {
  margin-top: 8px;
  padding: 10px 12px;
  border-radius: 12px;
  background: rgba(94, 231, 255, 0.06);
  border: 1px solid rgba(94, 231, 255, 0.12);
  animation: rise .4s var(--spring) both;
}
.reply.admin-reply {
  background: rgba(255, 106, 0, 0.08);
  border-color: rgba(255, 106, 0, 0.2);
}
.badge {
  display: inline-block;
  margin-left: 6px;
  padding: 2px 7px;
  border-radius: 999px;
  font-size: 10px;
  letter-spacing: 0.08em;
  color: #1a0c00;
  background: linear-gradient(135deg, #ffb347, var(--orange));
}
.row { display: flex; gap: 8px; flex-wrap: wrap; align-items: center; }
.reply-form { display: none; margin-top: 10px; }
.reply-form.open { display: block; animation: slideDown .35s var(--spring); }
.empty {
  color: var(--mute);
  text-align: center;
  padding: 36px 10px;
  letter-spacing: 0.08em;
}

.mask {
  position: fixed; inset: 0; z-index: 50;
  display: none;
  align-items: center; justify-content: center;
  background: rgba(3, 4, 8, 0.72);
  backdrop-filter: blur(6px);
}
.mask.open { display: flex; animation: rise .3s var(--spring); }
.modal {
  width: min(420px, 92vw);
  padding: 20px;
  border-radius: 18px;
  background: linear-gradient(160deg, #1c2230, #0d1017);
  border: 1px solid rgba(94, 231, 255, 0.22);
  box-shadow: 0 24px 60px rgba(0,0,0,0.55), 0 0 40px rgba(255, 106, 0, 0.12);
  animation: popIn .42s var(--spring);
}
.modal h3 {
  margin: 0;
  font-family: var(--font-display);
  letter-spacing: 1px;
}
.modal-sub { margin: 8px 0 14px; color: var(--mute); font-size: 13px; }
.modal-actions { display: flex; gap: 8px; }

.burst {
  position: fixed; inset: 0; pointer-events: none; z-index: 80; display: none;
}
.burst.on { display: block; }
.dot {
  position: absolute;
  width: 8px; height: 8px; border-radius: 50%;
  animation: burst 720ms var(--spring) forwards;
}

@keyframes rise {
  from { opacity: 0; transform: translateY(18px) scale(0.97); }
  to { opacity: 1; transform: none; }
}
@keyframes popIn {
  0% { opacity: 0; transform: scale(0.84); }
  65% { transform: scale(1.05); }
  100% { opacity: 1; transform: scale(1); }
}
@keyframes slideDown {
  from { opacity: 0; transform: translateY(-10px); }
  to { opacity: 1; transform: none; }
}
@keyframes shake {
  0%,100% { transform: translateX(0); }
  25% { transform: translateX(-5px); }
  75% { transform: translateX(5px); }
}
@keyframes tapPulse {
  0% { transform: scale(1); }
  40% { transform: scale(0.92); }
  100% { transform: scale(1); }
}
@keyframes metalPulse {
  0%,100% { transform: translateY(0); }
  50% { transform: translateY(-3px); }
}
@keyframes chipPop {
  from { transform: scale(0.7); opacity: 0; }
  to { transform: scale(1); opacity: 1; }
}
@keyframes scanDrift {
  from { transform: translateY(0); }
  to { transform: translateY(4px); }
}
@keyframes burst {
  0% { opacity: 1; transform: translate(0,0) scale(1); }
  100% { opacity: 0; transform: translate(var(--dx), var(--dy)) scale(0.3); }
}

@media (max-width: 720px) {
  .hero { flex-direction: column; align-items: flex-start; }
  .mark { width: 60px; height: 60px; }
  h1 { font-size: 30px; }
}