/* =========================
   BubbleGuard Apple-Style UI
   Dark-mode optimized (2025)
   ========================= */

/* ---------- Design Tokens ---------- */
:root{
  /* Typography */
  --font-ui: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, "Apple Color Emoji", "Segoe UI Emoji";

  /* Light palette */
  --bg: #f5f5f7;
  --bg-radial-1: #ffffff;
  --bg-radial-2: rgba(10,132,255,.08);
  --sheet: #ffffffcc;           /* frosted surfaces */
  --border: #e5e5ea;
  --text: #111114;
  --muted: #6e6e73;

  /* Bubbles */
  --blue: #0A84FF;              /* outgoing */
  --blue-press: #0a7af0;
  --incoming: #E5E5EA;          /* incoming */
  --incoming-text: #000;

  /* Accents */
  --focus: rgba(10,132,255,.5);
  --focus-outer: rgba(10,132,255,.15);

  /* Shadows */
  --shadow: 0 6px 24px rgba(0,0,0,.06);
  --shadow-strong: 0 10px 28px rgba(0,0,0,.10);

  /* Overlays/Pop */
  --popover-bg: rgba(28,28,30,.96);
  --chip-bg: rgba(118,118,128,.18);

  /* Misc */
  --danger: #ff3b30;

  /* Timestamp color (light mode) */
  --meta-color: #000;
}

[data-bs-theme="dark"]{
  /* Dark palette tuned for contrast */
  --bg: #0b0b0f;
  --bg-radial-1: #121217;
  --bg-radial-2: rgba(10,132,255,.10);
  --sheet: rgba(22,22,26,.76);
  --border: #2a2a31;
  --text: #ececf2;
  --muted: #a1a1aa;

  /* Bubbles */
  --blue: #0A84FF;
  --blue-press: #0a74e0;
  --incoming: #1f1f24;          /* deeper slate for dark */
  --incoming-text: #ececf2;

  /* Accents */
  --focus: rgba(10,132,255,.6);
  --focus-outer: rgba(10,132,255,.22);

  /* Shadows (softer/lower spread in dark to avoid haze) */
  --shadow: 0 8px 24px rgba(0,0,0,.45);
  --shadow-strong: 0 12px 36px rgba(0,0,0,.55);

  --popover-bg: rgba(18,18,20,.98);
  --chip-bg: rgba(255,255,255,.08);

  /* Timestamp color (dark mode) */
  --meta-color: #fff;
}

/* ---------- Base Layout ---------- */
html, body { height:100%; }
body{
  font-family: var(--font-ui);
  background:
    radial-gradient(900px 360px at 80% -10%, var(--bg-radial-1), transparent 60%),
    radial-gradient(900px 360px at -10% 110%, var(--bg-radial-2), transparent 70%),
    var(--bg);
  color: var(--text);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Smooth theme transitions (respect reduced motion) */
@media (prefers-reduced-motion: no-preference){
  body, .glass, .composer-wrap, .bubble, .input-ios, .ios-toast {
    transition: background-color .25s ease, color .25s ease, border-color .25s ease, box-shadow .25s ease;
  }
}

.app{ height:100dvh; display:grid; grid-template-rows:auto 1fr auto; }

/* ---------- Header ---------- */
.glass{
  backdrop-filter: saturate(1.15) blur(14px);
  background: var(--sheet);
  border-bottom: 1px solid var(--border);
}
.header-logo{ width:28px; height:28px; border-radius:8px; }
.app-title{ font-weight:600; letter-spacing:.2px; }
.subtle{ color: var(--muted); font-size:.82rem; }

/* Icon buttons (header + composer) */
.btn-ico{
  border: none;
  background: transparent;
  font-size: 20px;
  line-height: 1;
  padding: .35rem .5rem;
  border-radius: 10px;
  color: inherit;
}
.btn-ico:hover{ background: color-mix(in oklab, var(--border), transparent 70%); }
.btn-ico:focus-visible{ outline: 2px solid var(--focus); outline-offset: 2px; }

/* ---------- Chat Area ---------- */
.container.chat-wrap{ padding: 14px 14px 8px; overflow:auto; }
.row-start, .row-end{
  display:flex; gap:.6rem; align-items:flex-end; margin-bottom: .5rem;
}
.row-end{ justify-content: flex-end; }
.avatar{ width:28px; height:28px; border-radius:50%; flex:0 0 28px; }

/* ---------- Bubbles ---------- */
.bubble{
  max-width: 76%;
  border-radius: 20px;
  padding: 8px 12px;
  position: relative;
  box-shadow: var(--shadow);
  word-wrap: break-word;

  /* New message pop-in animation */
  animation: pop .28s ease-out both;
  animation-delay: var(--bubble-delay, 0s);
}
.bubble .copy{ font-size: .98rem; line-height: 1.25rem; }

/* timestamp uses theme token for color */
.bubble .meta{
  font-size: .72rem;
  color: var(--meta-color);
  margin-top: 2px;
  text-align: right;
}

.bubble-you{
  background: var(--blue);
  color: #fff;
  border-bottom-right-radius: 6px; /* iMessage corner */
  /* Outgoing bubbles lift slightly as they appear */
  animation-name: popYou, pop; /* first run popYou (translate), pop already set for scale */
}
@keyframes popYou{
  0%   { transform: translateY(6px) scale(.94); opacity:0; }
  70%  { transform: translateY(0) scale(1.04); opacity:1; }
  100% { transform: translateY(0) scale(1); }
}

.bubble-them{
  background: var(--incoming);
  color: var(--incoming-text);
  border-bottom-left-radius: 6px;
}

/* Bubble tails */
.bubble-you::after, .bubble-them::after{
  content:""; position:absolute; bottom:0; width:10px; height:14px; background:transparent;
}
.bubble-you::after{
  right:-2px; border-bottom-right-radius: 4px;
  box-shadow: 2px 2px 0 0 var(--blue);
}
.bubble-them::after{
  left:-2px; border-bottom-left-radius: 4px;
  box-shadow: -2px 2px 0 0 var(--incoming);
}

/* Media inside bubbles */
.chat-image{
  max-width: 260px; border-radius: 14px; display:block; box-shadow: var(--shadow-strong);
  animation: pop .28s ease-out both;
}
.audio-ios{ width: 260px; }

/* ---------- Composer ---------- */
.composer-wrap{
  backdrop-filter: blur(18px) saturate(1.1);
  border-top: 1px solid var(--border);
  background: var(--sheet);
}
.composer{
  display:grid; grid-template-columns: auto 1fr auto auto auto;
  gap: .5rem; align-items:center; padding: .6rem 0;
}

.input-shell{ position: relative; display:flex; align-items:center; width:100%; }
.input-ios{
  background: color-mix(in oklab, var(--incoming), transparent 75%);
  border: 1px solid color-mix(in oklab, var(--border), transparent 20%);
  color: var(--text);
  border-radius: 18px;
  padding: .55rem 2.8rem .55rem .8rem;
  box-shadow: none; resize: none; width:100%;
  caret-color: var(--blue);
}
.input-ios::placeholder{ color: color-mix(in oklab, var(--muted), #000 0%); opacity:.8; }
[data-bs-theme="dark"] .input-ios::placeholder{ color: color-mix(in oklab, var(--muted), #fff 8%); opacity:.85; }

.input-ios:focus{
  border-color: color-mix(in oklab, var(--blue), var(--border) 55%);
  outline: none;
  box-shadow: 0 0 0 .22rem var(--focus-outer);
}

/* typing indicator inside input — now bouncing */
.typing{ position:absolute; right:.8rem; top:50%; transform: translateY(-50%); }
.typing-dot{
  width:6px;height:6px;border-radius:999px;display:inline-block;background: color-mix(in oklab, var(--muted), #9aa0a6 15%);
  animation: bounceDot 1s infinite ease-in-out;
}
.typing-dot:nth-child(2){animation-delay:.16s}
.typing-dot:nth-child(3){animation-delay:.32s}

/* Send button */
.send-ios{
  background: var(--blue);
  border: none;
  color: #fff;
  width: 36px; height: 36px; border-radius: 50%;
  display:inline-flex; align-items:center; justify-content:center;
  font-weight:600; font-size: 16px;
  box-shadow: 0 6px 18px color-mix(in oklab, var(--blue), transparent 65%);
}
/* click pulse feedback */
.send-ios:active{ background: var(--blue-press); animation: pulse .4s ease; }
.send-ios:focus-visible{ outline: 2px solid var(--focus); outline-offset: 2px; }

/* ---------- Toast (iOS banner style) ---------- */
.toast-zone{ position: fixed; bottom: 16px; right: 16px; z-index: 1080; }
.ios-toast{
  background: var(--popover-bg);
  color: #fff;
  border: 0;
  border-radius: 14px;
  box-shadow: var(--shadow);
  animation: toastSlide .3s ease both;
}
.ios-toast .toast-body{ padding: .6rem .8rem; }

/* ---------- Drag & Drop highlight ---------- */
.drop{
  outline: 2px dashed color-mix(in oklab, var(--blue), #fff 0%);
  outline-offset: 6px;
  border-radius: 12px;
}

/* ---------- Block “blast” effect ---------- */
.bubble-blast{
  animation: popout .4s ease forwards;
  filter: saturate(1.1);
  background-image: linear-gradient(0deg, rgba(255,255,255,.08), transparent);
}

/* ---------- Extras: ticks, reactions, reply banner ---------- */
/* Delivered ticks */
.meta .ticks { margin-left:.35rem; display:inline-flex; gap:2px; vertical-align:baseline; }
.tick-solo, .tick-double { font-size:.72rem; opacity:.8; color: currentColor; }
.tick-double::after { content:"✓✓"; letter-spacing:-2px; }
.tick-solo::after  { content:"✓"; }

/* Reactions popover */
.react-pop{
  position:absolute; bottom:calc(100% + 6px); left:50%; transform:translateX(-50%);
  background: var(--popover-bg); color:#fff; border-radius:999px; padding:.25rem .35rem;
  display:flex; gap:.15rem; box-shadow: var(--shadow); z-index: 20; user-select:none;
  animation: popMenu .16s ease-out both;
}
.react-pop button{
  background:transparent; border:0; font-size:1rem; line-height:1; padding:.25rem .35rem; border-radius:10px; color:#fff;
}
.react-pop button:focus-visible{ outline:2px solid rgba(255,255,255,.35); outline-offset:2px; }

/* Reaction badges under bubble */
.react-row{
  display:flex; gap:.25rem; margin-top:.25rem; flex-wrap:wrap;
}
.react-chip{
  background: var(--chip-bg); color: var(--text);
  border-radius: 999px; padding:.05rem .45rem; font-size:.75rem; display:inline-flex; gap:.25rem; align-items:center;
  border: 1px solid var(--border);
  animation: reactionPop .24s ease-out both;
}

/* Reply banner */
.reply-banner{
  border-bottom:1px solid var(--border);
  background: color-mix(in oklab, var(--sheet), transparent 0%);
}
.reply-banner .rb-body{
  padding:.35rem .75rem; display:flex; align-items:center; gap:.75rem; max-width: 980px; margin: 0 auto;
}
.rb-line{ flex:1; overflow:hidden; text-overflow:ellipsis; white-space:nowrap; }
.rb-label{ color: var(--muted); margin-right:.35rem; }
.rb-snippet{ color: var(--text); opacity:.95; }
.rb-close{ margin-left:auto; }

/* Swipe hint (subtle blue outline pulse) */
@keyframes hintPulse{
  0%{ box-shadow: 0 0 0 0 color-mix(in oklab, var(--blue), transparent 75%); }
  100%{ box-shadow: 0 0 0 10px transparent; }
}
.bubble-them.swipe-hint{ animation: hintPulse .9s ease-out 1; }

/* Ensure bubbles anchor popovers */
.bubble { position: relative; }

/* ---------- Animations ---------- */
@keyframes pop{
  0%   { transform: scale(.88); opacity: 0; }
  70%  { transform: scale(1.04); opacity: 1; }
  100% { transform: scale(1); }
}
@keyframes popout{
  0%{ transform: scale(1); opacity:1 }
  70%{ transform: scale(1.04); opacity:.75 }
  100%{ transform: scale(.82); opacity:0 }
}
@keyframes bounceDot{
  0%, 80%, 100% { transform: translateY(0); }
  40% { transform: translateY(-4px); }
}
@keyframes pulse{
  0%   { transform: scale(1); box-shadow: 0 0 0 0 rgba(10,132,255,.5); }
  70%  { transform: scale(1.05); box-shadow: 0 0 0 8px rgba(10,132,255,0); }
  100% { transform: scale(1); box-shadow: 0 0 0 0 rgba(10,132,255,0); }
}
@keyframes popMenu{
  0% { transform: translateX(-50%) scale(.86); opacity:0; }
  100%{ transform: translateX(-50%) scale(1);   opacity:1; }
}
@keyframes reactionPop{
  0% { transform: scale(.75); opacity:0; }
  70%{ transform: scale(1.12); opacity:1; }
  100%{ transform: scale(1); }
}
@keyframes toastSlide{
  0% { transform: translateY(16px); opacity:0; }
  100%{ transform: translateY(0);    opacity:1; }
}

/* ---------- Accessibility & Polish ---------- */
/* Visible selection & caret */
::selection{ background: color-mix(in oklab, var(--blue), #ffffff 20%); color:#fff; }

/* High-contrast focus outlines on anchors/controls */
a:focus-visible, button:focus-visible, textarea:focus-visible { outline: 2px solid var(--focus); outline-offset: 2px; }

/* Scrollbar (subtle, both themes) */
*{ scrollbar-width: thin; scrollbar-color: color-mix(in oklab, var(--muted), #000 0%) transparent; }
::-webkit-scrollbar{ height:10px; width:10px; }
::-webkit-scrollbar-thumb{ background: color-mix(in oklab, var(--muted), transparent 60%); border-radius: 10px; }
::-webkit-scrollbar-track{ background: transparent; }

/* Reduced motion */
@media (prefers-reduced-motion: reduce){
  *{ animation: none !important; transition: none !important; }
}

/* ---------- Small-screen tweaks ---------- */
@media (max-width: 460px){
  .bubble{ max-width: 84%; }
  .chat-image, .audio-ios{ max-width: 220px; }
}