/* Shared depth and motion layer. Keep layout and content rules in app.css. */
:root {
  --glow-cyan: #6de5d0;
  --glow-blue: #79b9ff;
  --glow-pink: #ff9bba;
}

body {
  isolation: isolate;
  perspective: 1200px;
}

body::before {
  position: fixed;
  z-index: 0;
  inset: 0;
  pointer-events: none;
  content: "";
  opacity: .17;
  background-image:
    repeating-linear-gradient(118deg, transparent 0 82px, rgba(109, 229, 208, .11) 83px, transparent 84px 166px),
    repeating-linear-gradient(28deg, transparent 0 126px, rgba(255, 155, 186, .09) 127px, transparent 128px 254px);
  background-size: 200% 200%;
  animation: color-grid-drift 34s linear infinite alternate;
}

.site-nav,
.page-shell {
  position: relative;
  z-index: 1;
}

.site-nav {
  box-shadow: 0 8px 28px rgba(0, 0, 0, .14);
  transition: border-color .3s ease, background-color .3s ease;
}

.navbar-brand,
.brand-mark,
.brand-logo,
.site-nav .nav-link,
.btn-icon,
.btn-send,
.btn-join,
.admin-button,
.admin-small {
  transition: color .22s ease, background-color .22s ease, border-color .22s ease, box-shadow .22s ease, transform .22s ease;
}

.site-nav .nav-link {
  position: relative;
}

.site-nav .nav-link::after {
  position: absolute;
  right: 0;
  bottom: 4px;
  left: 0;
  height: 1px;
  content: "";
  background: linear-gradient(90deg, var(--glow-cyan), var(--acid), var(--glow-pink));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .25s ease;
}

.site-nav .nav-link:hover::after {
  transform: scaleX(1);
}

.entry-layout {
  perspective: 1400px;
}

.entry-copy h1 {
  text-shadow: 0 14px 42px rgba(109, 229, 208, .09);
}

.entry-copy h1 em {
  background: linear-gradient(105deg, var(--acid), var(--glow-cyan) 55%, var(--glow-pink));
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.entry-form {
  position: relative;
  transform: rotateY(-3deg) rotateX(1deg);
  transform-style: preserve-3d;
  animation: card-float 7s ease-in-out infinite;
  box-shadow: 0 34px 80px rgba(0, 0, 0, .32), 12px 14px 0 -10px rgba(109, 229, 208, .24), -12px -14px 0 -10px rgba(255, 155, 186, .17);
}

.entry-form:focus-within {
  border-color: rgba(109, 229, 208, .54);
  box-shadow: 0 34px 90px rgba(0, 0, 0, .38), 0 0 34px rgba(109, 229, 208, .1);
}

.btn-join,
.admin-button,
.btn-send {
  box-shadow: 0 6px 0 rgba(20, 31, 24, .55), 0 10px 25px rgba(212, 237, 112, .13);
}

.btn-join:hover,
.admin-button:hover,
.btn-send:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 0 rgba(20, 31, 24, .5), 0 15px 30px rgba(109, 229, 208, .2);
}

.btn-join:active,
.admin-button:active,
.btn-send:active {
  transform: translateY(2px);
  box-shadow: 0 2px 0 rgba(20, 31, 24, .55);
}

.room-grid {
  perspective: 1100px;
}

.room-tile {
  transform-style: preserve-3d;
  box-shadow: 0 12px 24px rgba(0, 0, 0, .15), inset 0 1px rgba(255, 255, 255, .035);
}

.room-tile:nth-child(3n + 1) {
  --tile-accent: var(--glow-cyan);
}

.room-tile:nth-child(3n + 2) {
  --tile-accent: var(--glow-pink);
}

.room-tile:nth-child(3n) {
  --tile-accent: var(--glow-blue);
}

.room-icon {
  color: var(--tile-accent, var(--acid));
  transform: translateZ(18px);
  transition: transform .3s ease, filter .3s ease;
}

.room-tile h2,
.room-tile p,
.room-enter {
  transform: translateZ(9px);
}

.room-tile:hover {
  transform: translate3d(0, -8px, 14px) rotateX(2deg) rotateY(-1.5deg);
  border-color: color-mix(in srgb, var(--tile-accent, var(--acid)) 65%, transparent);
  box-shadow: 0 25px 42px rgba(0, 0, 0, .28), 0 0 28px color-mix(in srgb, var(--tile-accent, var(--acid)) 12%, transparent), inset 0 1px rgba(255, 255, 255, .08);
}

.room-tile:hover .room-icon {
  transform: translate3d(2px, -2px, 28px) rotate(-8deg) scale(1.08);
  filter: drop-shadow(0 5px 12px color-mix(in srgb, var(--tile-accent, var(--acid)) 45%, transparent));
}

.conversation,
.people-panel,
.entry-form,
.stat-card,
.admin-panel,
.admin-table-wrap {
  box-shadow: 0 20px 55px rgba(0, 0, 0, .2), inset 0 1px rgba(255, 255, 255, .035);
}

.conversation-head {
  background: linear-gradient(100deg, rgba(109, 229, 208, .045), transparent 55%, rgba(255, 155, 186, .035));
}

.message-row {
  transform-origin: 15% 85%;
  animation: message-arrive .28s cubic-bezier(.2, .8, .2, 1) both;
}

.own-message {
  transform-origin: 85% 85%;
}

.message-bubble {
  box-shadow: 0 5px 12px rgba(0, 0, 0, .12);
  transition: border-color .2s ease, transform .2s ease;
}

.message-row:hover .message-bubble {
  border-color: rgba(109, 229, 208, .2);
  transform: translateY(-1px);
}

.message-avatar,
.person-avatar {
  box-shadow: 0 4px 12px rgba(0, 0, 0, .24), inset 0 1px rgba(255, 255, 255, .13);
}

.ai-mark {
  animation: star-turn 12s linear infinite;
  filter: drop-shadow(0 0 9px rgba(212, 237, 112, .36));
}

.live-dot {
  animation: live-beat 2.4s ease-in-out infinite;
}

.person-row,
.admin-nav,
.stat-card {
  transition: transform .2s ease, background-color .2s ease, border-color .2s ease, box-shadow .2s ease;
}

.person-row:hover {
  transform: translateX(3px);
}

.admin-nav.active,
.admin-nav:hover {
  box-shadow: inset 3px 0 var(--glow-cyan), 0 7px 18px rgba(0, 0, 0, .13);
}

.stat-card:hover {
  transform: translateY(-4px) rotateX(2deg);
  border-color: rgba(109, 229, 208, .34);
  box-shadow: 0 18px 34px rgba(0, 0, 0, .23), 0 0 25px rgba(109, 229, 208, .06);
}

.admin-table tbody tr {
  transition: background-color .18s ease;
}

.admin-table tbody tr:hover {
  background: rgba(109, 229, 208, .045);
}

.admin-small:hover {
  transform: translateY(-1px);
  box-shadow: 0 5px 12px rgba(0, 0, 0, .2);
}

@keyframes color-grid-drift {
  from { background-position: 0 0, 0 0; }
  to { background-position: 110px -70px, -95px 85px; }
}

@keyframes card-float {
  0%, 100% { transform: rotateY(-3deg) rotateX(1deg) translateY(0); }
  50% { transform: rotateY(-1deg) rotateX(0deg) translateY(-5px); }
}

@keyframes message-arrive {
  from { opacity: 0; transform: translate3d(0, 8px, -10px) scale(.985); }
  to { opacity: 1; transform: translate3d(0, 0, 0) scale(1); }
}

@keyframes star-turn {
  to { transform: rotate(360deg); }
}

@keyframes live-beat {
  0%, 100% { box-shadow: 0 0 0 4px rgba(140, 205, 183, .12); }
  50% { box-shadow: 0 0 0 7px rgba(109, 229, 208, .04), 0 0 14px rgba(109, 229, 208, .42); }
}

@media (hover: none) {
  .entry-form { animation: none; transform: none; }
  .room-tile:hover,
  .room-tile:hover .room-icon { transform: none; }
}

@media (max-width: 680px) {
  .entry-form { animation: none; transform: none; }
  .room-tile:hover { transform: translateY(-3px); }
  .conversation,
  .people-panel { box-shadow: 0 12px 32px rgba(0, 0, 0, .18); }
}

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