/* =====================================================
   LUZYX — Mini AI Assistant
   style.css — design, layout, glassmorphism, animation
   ===================================================== */

:root{
  --bg:#05060c;
  --ink:#eaf0ff;
  --muted:#9aa6c7;
  --cyan:#7df9ff;
  --violet:#7c5cff;
  --glass:rgba(255,255,255,.055);
  --glass-strong:rgba(255,255,255,.09);
  --line:rgba(255,255,255,.10);
  --radius:18px;
  --shadow:0 20px 60px rgba(0,0,0,.45);
}

*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;
  background:var(--bg);
  color:var(--ink);
  font-family:"Inter",system-ui,-apple-system,Segoe UI,sans-serif;
  -webkit-font-smoothing:antialiased;
  overflow:hidden;
}
button{font:inherit;color:inherit}
.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}

:focus-visible{outline:2px solid var(--cyan);outline-offset:2px;border-radius:12px}

/* ---------- Animated background ---------- */
.bg{position:fixed;inset:0;z-index:0;overflow:hidden;background:radial-gradient(120% 90% at 50% -10%,#101733 0%,#05060c 60%)}

/* Depth layers. Each layer's --depth is a px multiplier consumed by
   .layer-parallax-x/.layer-parallax-y (set once per frame on <html>,
   see BACKGROUND ENGINE in script.js) — this keeps the per-frame DOM
   write down to two custom properties on one element, however many
   layers read them. Grid uses a negative depth to drift opposite the
   cursor, per spec. */
.parallax-layer{position:absolute;inset:0;will-change:transform;pointer-events:none}
.parallax-layer{
  transform:translate3d(
    calc(var(--layer-px,0) * var(--depth,0)),
    calc(var(--layer-py,0) * var(--depth,0)),
    0
  );
}

.bg-grid{
  position:absolute;inset:-20%;
  background-image:linear-gradient(rgba(255,255,255,.045) 1px,transparent 1px),
                   linear-gradient(90deg,rgba(255,255,255,.045) 1px,transparent 1px);
  background-size:64px 64px;
  mask-image:radial-gradient(70% 60% at 50% 40%,#000 0%,transparent 75%);
  animation:drift 60s linear infinite;
}
@keyframes drift{to{transform:translate3d(64px,64px,0)}}

.blob{position:absolute;border-radius:50%;filter:blur(90px);opacity:.42;will-change:transform}
.blob-1{width:46vw;height:46vw;left:-8vw;top:-10vw;background:radial-gradient(circle,#7c5cff,transparent 65%);animation:float1 26s ease-in-out infinite}
.blob-2{width:40vw;height:40vw;right:-10vw;top:10vh;background:radial-gradient(circle,#1fd8c4,transparent 65%);animation:float2 32s ease-in-out infinite}
.blob-3{width:44vw;height:44vw;left:25vw;bottom:-22vw;background:radial-gradient(circle,#2f6bff,transparent 65%);animation:float3 38s ease-in-out infinite}
@keyframes float1{50%{transform:translate3d(8vw,6vh,0) scale(1.12)}}
@keyframes float2{50%{transform:translate3d(-7vw,8vh,0) scale(1.08)}}
@keyframes float3{50%{transform:translate3d(5vw,-7vh,0) scale(1.14)}}

#particles{position:absolute;inset:0;width:100%;height:100%}

/* Floating micro-objects — the "closest" depth layer. A handful of
   faint shapes drifting slowly, each with its own size/speed/opacity
   so the parallax reads as depth rather than a flat sprite sheet. */
.layer-float{opacity:.8}
.float-obj{position:absolute;border-radius:50%;will-change:transform,opacity}
.obj-orb{
  width:10px;height:10px;left:18%;top:28%;
  background:radial-gradient(circle,rgba(125,249,255,.9),rgba(125,249,255,0) 70%);
  filter:blur(.5px);
  animation:floatObj 22s ease-in-out infinite;
}
.obj-orb-sm{width:6px;height:6px;left:auto;right:22%;top:62%;opacity:.7;animation-duration:27s;animation-delay:-6s;
  background:radial-gradient(circle,rgba(124,92,255,.9),rgba(124,92,255,0) 70%);}
.obj-ring{
  width:34px;height:34px;left:68%;top:16%;border-radius:50%;
  border:1px solid rgba(125,249,255,.28);background:transparent;
  animation:floatObj 30s ease-in-out infinite;animation-delay:-11s;
}
.obj-hex{
  width:16px;height:16px;left:10%;top:70%;background:transparent;border-radius:4px;
  border:1px solid rgba(124,92,255,.3);transform:rotate(45deg);
  animation:floatObj 24s ease-in-out infinite;animation-delay:-3s;
}
.obj-dot{
  width:3px;height:3px;left:82%;top:44%;background:rgba(234,240,255,.55);
  animation:floatObj 18s ease-in-out infinite;animation-delay:-8s;
}
.obj-dot-sm{width:2px;height:2px;left:40%;top:12%;opacity:.5;animation-duration:20s;animation-delay:-14s}
.obj-streak{
  width:60px;height:1px;left:55%;top:80%;border-radius:2px;
  background:linear-gradient(90deg,transparent,rgba(125,249,255,.4),transparent);
  animation:floatObj 26s ease-in-out infinite;animation-delay:-17s;
}
@keyframes floatObj{
  0%,100%{transform:translate3d(0,0,0) scale(1);opacity:.55}
  50%{transform:translate3d(1.4vw,-2.2vh,0) scale(1.15);opacity:.95}
}

/* ---------- Cursor light system ---------- */
/* Three lerped layers (see CURSOR INTERACTION in script.js): a small
   bright point (fast, ~no lag), a primary glow (medium lag), and a
   large soft aura (slow lag) — together they read as a trailing field
   of light rather than a single glow that snaps to the pointer. */
.cursor-light{position:absolute;inset:0;opacity:0;transition:opacity .45s ease;pointer-events:none}
.cursor-light.active{opacity:1}
.cursor-aura,.cursor-glow,.cursor-point{position:absolute;top:0;left:0;border-radius:50%;will-change:transform}
.cursor-aura{
  width:760px;height:760px;margin:-380px 0 0 -380px;
  background:radial-gradient(circle,rgba(124,92,255,.05),transparent 68%);
}
.cursor-glow{
  width:420px;height:420px;margin:-210px 0 0 -210px;
  background:radial-gradient(circle,rgba(125,249,255,.10),rgba(124,92,255,.06) 45%,transparent 70%);
}
.cursor-point{
  width:6px;height:6px;margin:-3px 0 0 -3px;
  background:#dffcff;box-shadow:0 0 14px 4px rgba(125,249,255,.55);
}

.bg-vignette{position:absolute;inset:0;background:radial-gradient(90% 70% at 50% 50%,transparent 40%,rgba(3,4,9,.75) 100%)}

/* ---------- Shell ---------- */
.shell{position:relative;z-index:1;height:100dvh;display:flex}
.app{flex:1;min-width:0;height:100dvh;display:flex;flex-direction:column;max-width:960px;margin:0 auto;padding:14px 16px 12px}

/* ---------- Sidebar ---------- */
.sidebar{
  flex:none;width:272px;height:100dvh;display:flex;flex-direction:column;gap:10px;
  padding:14px 12px;border-right:1px solid var(--line);
  background:rgba(8,10,20,.55);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);
  transition:transform .32s cubic-bezier(.16,1,.3,1);
}
.sidebar-top{display:flex;align-items:center;justify-content:space-between;padding:2px 4px 4px}
.sidebar-brand{display:flex;align-items:center;gap:9px;min-width:0}
.logo-sm{width:32px;height:32px;border-radius:10px}
.sidebar-close{display:none}

.new-chat-btn{
  display:flex;align-items:center;gap:8px;justify-content:center;
  padding:10px 14px;border-radius:14px;cursor:pointer;
  border:1px solid var(--line);
  background:linear-gradient(140deg,rgba(125,249,255,.14),rgba(124,92,255,.18));
  color:var(--ink);font-size:13.5px;font-weight:500;
  /* transform is driven per-frame by the magnetic-button effect in
     script.js while the cursor is nearby, then handed off to :hover/
     :active below once the pointer is actually over the button — so
     transform is intentionally left out of this transition to avoid
     fighting the JS-driven lerp. */
  transition:border-color .18s ease,background .18s ease;
}
.new-chat-btn:hover{transform:translateY(-1px);border-color:rgba(125,249,255,.4)}
.new-chat-btn:active{transform:translateY(0) scale(.98)}

.history{flex:1;min-height:0;overflow-y:auto;display:flex;flex-direction:column;gap:14px;padding:4px 2px 8px}
.history::-webkit-scrollbar{width:6px}
.history::-webkit-scrollbar-thumb{background:rgba(255,255,255,.12);border-radius:8px}

.history-group{display:flex;flex-direction:column;gap:3px}
.history-label{font-size:11px;color:var(--muted);letter-spacing:.05em;padding:0 8px 5px;font-family:"Sora",sans-serif}

.history-item{
  display:flex;align-items:center;gap:9px;width:100%;text-align:left;cursor:pointer;
  padding:9px 9px;border-radius:11px;border:1px solid transparent;background:transparent;
  color:var(--muted);font-size:13px;
  transition:background .16s ease,color .16s ease,border-color .16s ease,transform .16s cubic-bezier(.16,1,.3,1);
}
.history-item span{white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.history-item:hover{background:rgba(255,255,255,.05);color:var(--ink);transform:translateX(2px)}
.history-item:hover .h-ico{opacity:1}
.history-item.active{
  background:var(--glass-strong);color:var(--ink);border-color:rgba(125,249,255,.3);
  box-shadow:0 0 0 1px rgba(125,249,255,.08) inset,0 0 16px rgba(124,92,255,.16);
}
.history-item .h-ico{flex:none;opacity:.65;transition:opacity .16s ease}

/* Short cross-fade when a different conversation is opened, instead
   of the transcript instantly swapping. */
.chat.switching{animation:chatSwitch .22s ease both}
@keyframes chatSwitch{from{opacity:0}to{opacity:1}}

/* Tiny stagger for history items when the mobile drawer opens */
.shell.sidebar-open .history-item{animation:rise .32s cubic-bezier(.16,1,.3,1) both}
.shell.sidebar-open .history-item:nth-of-type(1){animation-delay:.03s}
.shell.sidebar-open .history-item:nth-of-type(2){animation-delay:.06s}
.shell.sidebar-open .history-item:nth-of-type(3){animation-delay:.09s}
.shell.sidebar-open .history-item:nth-of-type(4){animation-delay:.12s}
.shell.sidebar-open .history-item:nth-of-type(5){animation-delay:.15s}
.shell.sidebar-open .history-item:nth-of-type(n+6){animation-delay:.17s}

.history-empty{color:var(--muted);font-size:12.5px;padding:10px 8px;line-height:1.5}

.sidebar-backdrop{
  display:none;position:fixed;inset:0;z-index:15;background:rgba(3,4,9,.6);
  opacity:0;pointer-events:none;transition:opacity .28s ease;
}

.menu-btn{display:none}
.glass{
  background:var(--glass);
  border:1px solid var(--line);
  backdrop-filter:blur(18px);
  -webkit-backdrop-filter:blur(18px);
  box-shadow:var(--shadow);
}

/* ---------- Header ---------- */
.header{display:flex;align-items:center;justify-content:space-between;gap:12px;border-radius:var(--radius);padding:10px 14px}
.brand{display:flex;align-items:center;gap:12px;min-width:0}
.logo{
  display:grid;place-items:center;width:40px;height:40px;border-radius:13px;
  background:linear-gradient(140deg,rgba(125,249,255,.16),rgba(124,92,255,.22));
  border:1px solid var(--line);
  animation:logoGlow 4.5s ease-in-out infinite;
}
@keyframes logoGlow{0%,100%{box-shadow:0 0 0 rgba(124,92,255,0)}50%{box-shadow:0 0 22px rgba(124,92,255,.45)}}
.brand-text{display:flex;flex-direction:column;line-height:1.1;min-width:0}
.brand-text strong{font-family:"Sora",sans-serif;font-size:17px;letter-spacing:.16em}
.brand-text small{color:var(--muted);font-size:11.5px;letter-spacing:.04em}
.tag{
  font-size:11px;color:var(--muted);padding:5px 10px;border-radius:999px;
  border:1px solid var(--line);background:rgba(255,255,255,.04);white-space:nowrap
}
.header-right{display:flex;align-items:center;gap:8px}
.status{display:inline-flex;align-items:center;gap:7px;font-size:12.5px;color:#bcf7e6;padding:6px 11px;border-radius:999px;border:1px solid rgba(31,216,196,.25);background:rgba(31,216,196,.08)}
.dot{width:7px;height:7px;border-radius:50%;background:#28e0b8;box-shadow:0 0 0 0 rgba(40,224,184,.6);animation:pulse 2.2s infinite}
@keyframes pulse{70%{box-shadow:0 0 0 9px rgba(40,224,184,0)}100%{box-shadow:0 0 0 0 rgba(40,224,184,0)}}

.icon-btn{
  display:grid;place-items:center;width:36px;height:36px;border-radius:12px;cursor:pointer;
  border:1px solid var(--line);background:rgba(255,255,255,.04);color:var(--muted);
  transition:transform .18s ease,color .18s ease,background .18s ease;
}
.icon-btn:hover{color:var(--ink);background:rgba(255,255,255,.09);transform:translateY(-1px)}
.icon-btn.ghost{border-color:transparent;background:transparent}

/* Menu/Back are magnetic (see CURSOR INTERACTION in script.js) — JS
   owns their transform on approach, so it's left out of the
   transition here and only :hover/:active snap it back via CSS. */
.menu-btn,.back-btn{transition:color .18s ease,background .18s ease}
.menu-btn:hover,.back-btn:hover{transform:translateY(-1px)}

/* ---------- Main ---------- */
.main{position:relative;flex:1;min-height:0;overflow-y:auto;scroll-behavior:smooth;padding:18px 2px 6px}
.main::-webkit-scrollbar{width:8px}
.main::-webkit-scrollbar-thumb{background:rgba(255,255,255,.12);border-radius:8px}

/* ---------- Welcome ---------- */
/* Entrance is staggered per-element (badge → heading → subtitle →
   description → cards) instead of animating the whole block as one
   unit, landing the full sequence in ~650–850ms. */
.welcome{text-align:center;padding:5vh 6px 10px}
.badge,.welcome h1,.welcome h2,.welcome p{opacity:0;animation:rise .5s cubic-bezier(.16,1,.3,1) both}
.badge{display:inline-flex;align-items:center;gap:8px;font-size:12px;color:var(--muted);padding:6px 13px;border-radius:999px;border:1px solid var(--line);background:rgba(255,255,255,.04);animation-delay:.02s}
.welcome h1{font-family:"Sora",sans-serif;font-size:clamp(30px,5.4vw,48px);margin:18px 0 6px;letter-spacing:-.02em;animation-delay:.09s}
.grad{background:linear-gradient(100deg,var(--cyan),var(--violet));-webkit-background-clip:text;background-clip:text;color:transparent}
.welcome h2{font-size:clamp(15px,2.4vw,19px);font-weight:500;color:#c6d0ee;margin:0 0 10px;animation-delay:.16s}
.welcome p{color:var(--muted);max-width:520px;margin:0 auto;font-size:14.5px;line-height:1.6;animation-delay:.23s}

.cards{display:grid;grid-template-columns:repeat(2,1fr);gap:12px;margin-top:28px;text-align:left}
.card{
  position:relative;overflow:hidden;
  display:flex;flex-direction:column;gap:6px;cursor:pointer;padding:16px;border-radius:16px;
  background:var(--glass);border:1px solid var(--line);backdrop-filter:blur(14px);
  opacity:0;animation:rise .45s cubic-bezier(.16,1,.3,1) both;
  transition:transform .22s cubic-bezier(.16,1,.3,1),border-color .2s ease,box-shadow .25s ease,background .2s ease;
}
.card:nth-child(1){animation-delay:.30s}
.card:nth-child(2){animation-delay:.36s}
.card:nth-child(3){animation-delay:.42s}
.card:nth-child(4){animation-delay:.48s}
/* Radial highlight tracks the cursor via --mx/--my, set per-card on
   mousemove (see COMPOSER/UI interactions in script.js) */
.card::after{
  content:"";position:absolute;inset:0;border-radius:inherit;pointer-events:none;
  background:radial-gradient(220px circle at var(--mx,50%) var(--my,50%),rgba(125,249,255,.14),transparent 62%);
  opacity:0;transition:opacity .3s ease;
}
.card:hover{transform:translateY(-3px);border-color:rgba(125,249,255,.35);background:var(--glass-strong);box-shadow:0 14px 40px rgba(124,92,255,.22)}
.card:hover::after{opacity:1}
.card:hover .card-ico{transform:translate(1px,-1px)}
.card-ico{font-size:19px;transition:transform .2s ease}
.card strong{font-family:"Sora",sans-serif;font-size:14.5px}
.card span:last-child{color:var(--muted);font-size:13px;line-height:1.5}

/* ---------- Chat ---------- */
.chat{display:flex;flex-direction:column;gap:16px;padding:6px 2px 4px}
.msg{display:flex;gap:10px;max-width:86%;animation:messageIn .42s cubic-bezier(.16,1,.3,1) both}
.msg.bot{align-self:flex-start}
.msg.user{align-self:flex-end;flex-direction:row-reverse}
.avatar{
  flex:none;width:32px;height:32px;border-radius:10px;display:grid;place-items:center;font-size:11px;
  font-family:"Sora",sans-serif;letter-spacing:.06em;
  background:linear-gradient(140deg,rgba(125,249,255,.2),rgba(124,92,255,.3));border:1px solid var(--line)
}
.bubble{
  padding:12px 15px;border-radius:16px;font-size:14.5px;line-height:1.65;
  background:var(--glass);border:1px solid var(--line);backdrop-filter:blur(14px);white-space:pre-wrap
}
.msg.bot .bubble{border-top-left-radius:6px}
.msg.user .bubble{
  border-top-right-radius:6px;
  background:linear-gradient(135deg,rgba(124,92,255,.42),rgba(47,107,255,.34));
  border-color:rgba(146,120,255,.45);
}
.time{display:block;margin-top:6px;font-size:10.5px;color:var(--muted);letter-spacing:.04em}

.typing{display:flex;gap:5px;padding:15px}
.typing i{width:7px;height:7px;border-radius:50%;background:var(--cyan);opacity:.55;box-shadow:0 0 7px rgba(125,249,255,.5);animation:blink 1.2s infinite}
.typing i:nth-child(2){animation-delay:.18s}
.typing i:nth-child(3){animation-delay:.36s}
@keyframes blink{0%,80%,100%{opacity:.3;transform:translateY(0)}40%{opacity:1;transform:translateY(-4px)}}

@keyframes rise{from{opacity:0;transform:translateY(12px)}to{opacity:1;transform:none}}
/* Cinematic message entrance: fade + rise + a hint of scale, rather
   than an abrupt appearance. */
@keyframes messageIn{
  from{opacity:0;transform:translateY(14px) scale(.985)}
  to{opacity:1;transform:none}
}

/* Floating "↓ New messages" — only shown when content arrives while
   the user has scrolled up to read older messages (see MESSAGE
   RENDERING / scroll handling in script.js). */
.scroll-bottom-btn{
  position:absolute;left:50%;bottom:14px;z-index:5;
  display:flex;align-items:center;gap:6px;
  padding:8px 14px;border-radius:999px;cursor:pointer;
  border:1px solid rgba(125,249,255,.32);
  background:rgba(10,14,26,.82);backdrop-filter:blur(10px);color:var(--ink);
  font-size:12.5px;box-shadow:0 10px 28px rgba(0,0,0,.4);
  opacity:0;pointer-events:none;
  transform:translate(-50%,8px);
  transition:opacity .22s ease,transform .22s cubic-bezier(.16,1,.3,1);
}
.scroll-bottom-btn.show{opacity:1;pointer-events:auto;transform:translate(-50%,0)}
.scroll-bottom-btn:hover{border-color:rgba(125,249,255,.55);background:rgba(14,18,32,.9)}
.scroll-bottom-btn:active{transform:translate(-50%,0) scale(.96)}

/* ---------- Composer ---------- */
.composer-wrap{padding-top:10px}
.chips{display:flex;gap:8px;overflow-x:auto;padding:0 2px 10px;scrollbar-width:none}
.chips::-webkit-scrollbar{display:none}
.chip{
  white-space:nowrap;cursor:pointer;font-size:12.5px;color:var(--muted);padding:7px 13px;border-radius:999px;
  border:1px solid var(--line);background:rgba(255,255,255,.04);transition:all .18s ease
}
.chip:hover{color:var(--ink);border-color:rgba(125,249,255,.4);transform:translateY(-1px)}

.composer{
  display:flex;align-items:flex-end;gap:6px;padding:8px;border-radius:20px;
  transition:border-color .28s cubic-bezier(.16,1,.3,1),box-shadow .28s cubic-bezier(.16,1,.3,1),background .28s ease;
}
.composer:focus-within{
  border-color:rgba(125,249,255,.45);
  background:rgba(255,255,255,.07);
  box-shadow:0 0 0 4px rgba(125,249,255,.09),0 0 26px rgba(124,92,255,.12),var(--shadow);
}
.composer textarea{
  flex:1;resize:none;max-height:140px;border:0;outline:0;background:transparent;color:var(--ink);
  font:inherit;font-size:14.5px;line-height:1.5;padding:9px 4px;
  transition:height .16s cubic-bezier(.16,1,.3,1);
}
.composer textarea::placeholder{color:#6f7b9c}
.send{
  flex:none;width:40px;height:40px;border-radius:14px;cursor:pointer;border:0;display:grid;place-items:center;
  color:#04121a;background:linear-gradient(135deg,var(--cyan),var(--violet));
  box-shadow:0 0 0 rgba(124,92,255,0);
  /* transform is magnetic on approach (script.js); :hover/:active own
     it once the pointer is actually on the button. */
  transition:filter .18s ease,opacity .18s ease,box-shadow .3s ease;
}
.send:hover{transform:translateY(-2px) scale(1.04);filter:brightness(1.1);box-shadow:0 6px 22px rgba(124,92,255,.35)}
.send:active{transform:scale(.93)}
.send:disabled{opacity:.45;cursor:not-allowed;transform:none}
@keyframes sendPulse{0%{transform:scale(1)}45%{transform:scale(.88)}100%{transform:scale(1)}}
.send.sent{animation:sendPulse .32s cubic-bezier(.16,1,.3,1)}
.hint{text-align:center;color:#5f6b8c;font-size:11px;margin:8px 0 2px}

/* ---------- Creator credit ---------- */
/* Small, static signature lines — intentionally left out of the
   welcome-screen entrance stagger and given no size/color beyond the
   existing muted/hint tokens, so they read as a footnote rather than
   competing with the product UI. */
.credit{
  text-align:center;color:var(--muted);font-size:11px;letter-spacing:.02em;
  opacity:.5;transition:opacity .2s ease,color .2s ease;
}
.credit:hover{opacity:.85;color:var(--ink)}
.credit-top{margin:0 0 16px}
.credit-bottom{margin:6px 0 0;font-size:10.5px}

/* ---------- Touch & responsive ---------- */
html{-webkit-text-size-adjust:100%}
button,.card,.chip{-webkit-tap-highlight-color:transparent;touch-action:manipulation}
.main{overscroll-behavior:contain;-webkit-overflow-scrolling:touch}
.card:active,.chip:active,.icon-btn:active{transform:scale(.97)}
.history-item:active{transform:scale(.98)}
.new-chat-btn:active{transform:translateY(0) scale(.97)}

/* Tablets — trim the background's cost before layout even changes */
@media (max-width:1024px){
  .app{max-width:820px;padding:12px 18px}
  .cards{gap:14px}
  .obj-ring,.obj-hex,.obj-streak{display:none}
}

/* Sidebar becomes an off-canvas drawer below desktop width */
@media (max-width:960px){
  .shell{overflow:hidden}
  .menu-btn{display:grid}
  .sidebar-close{display:grid}
  .sidebar{
    position:fixed;top:0;left:0;z-index:20;width:min(84vw,300px);
    padding-top:max(14px,env(safe-area-inset-top));
    transform:translateX(-100%);
    box-shadow:24px 0 60px rgba(0,0,0,.5);
  }
  .shell.sidebar-open .sidebar{transform:translateX(0)}
  .shell.sidebar-open .sidebar-backdrop{display:block;opacity:1;pointer-events:auto}
  .app{max-width:none}
}

/* Phones */
@media (max-width:720px){
  .app{
    padding:max(8px,env(safe-area-inset-top)) max(10px,env(safe-area-inset-right)) max(8px,env(safe-area-inset-bottom)) max(10px,env(safe-area-inset-left));
  }
  .header{padding:8px 10px;border-radius:16px}
  .tag{display:none}
  .logo{width:36px;height:36px;border-radius:11px}
  .brand{gap:10px}
  .brand-text strong{font-size:15.5px}
  .brand-text small{font-size:11px}
  .status{padding:6px 9px;font-size:12px}
  .welcome{padding:3vh 2px 8px}
  .credit-top{margin-bottom:12px}
  .welcome h1{margin-top:14px}
  .welcome p{font-size:14px}
  .cards{grid-template-columns:1fr;gap:10px;margin-top:20px}
  .card{flex-direction:row;flex-wrap:wrap;align-items:center;column-gap:10px;padding:14px;min-height:64px}
  .card span:last-child{flex-basis:100%}
  .msg{max-width:94%}
  .bubble{font-size:15px;padding:11px 13px}
  .avatar{width:28px;height:28px;border-radius:9px;font-size:10px}
  .chips{margin:0 -10px;padding:0 10px 10px;scroll-snap-type:x proximity}
  .chip{scroll-snap-align:start;padding:10px 15px;font-size:13px;min-height:40px}
  .composer{border-radius:22px;padding:6px}
  /* 16px prevents iOS auto-zoom on focus */
  .composer textarea{font-size:16px;padding:11px 4px}
  .hint{display:none}
}

/* Very small phones */
@media (max-width:380px){
  .status{font-size:0;padding:8px;gap:0}
  .brand-text small{display:none}
  .composer .icon-btn.ghost:first-child{display:none}
}

/* Touch devices: larger tap targets, no sticky hover lifts, and no
   cursor-driven effects (magnetic buttons, cursor light, card glow,
   fine parallax) — there is no mouse to react to, so skip the cost. */
@media (hover:none) and (pointer:coarse){
  .icon-btn{width:44px;height:44px}
  .send{width:46px;height:46px;border-radius:16px}
  .card:hover,.chip:hover,.icon-btn:hover,.send:hover{transform:none;box-shadow:none}
  .history-item:hover,.new-chat-btn:hover{transform:none}
  .main::-webkit-scrollbar{display:none}

  .cursor-light{display:none}
  .card::after{display:none}
  .parallax-layer{transform:none !important}
  .layer-float{display:none}
  .obj-ring,.obj-hex,.obj-streak{display:none}
}

/* Landscape phones: reclaim vertical space */
@media (max-height:500px) and (orientation:landscape){
  .welcome{padding-top:8px}
  .welcome h1{font-size:28px;margin:8px 0 4px}
  .cards{grid-template-columns:repeat(2,1fr);margin-top:14px}
  .hint{display:none}
  .composer textarea{max-height:80px}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important}
  /* Belt-and-braces on top of the blanket rule above: these are all
     JS-driven per-frame effects, so make sure they're fully inert
     rather than merely losing their CSS transition. */
  .cursor-light,.layer-float{display:none}
  .parallax-layer{transform:none!important}
  .card::after{display:none}
}


/* ---------- Streaming response ---------- */
.bubble.streaming{
  white-space:pre-wrap;
  overflow-wrap:anywhere;
}
.bubble.streaming::after{
  content:"";
  display:inline-block;
  width:7px;
  height:1.05em;
  margin-left:3px;
  vertical-align:-.15em;
  border-radius:2px;
  background:currentColor;
  opacity:.75;
  animation:streamCursor .8s steps(1,end) infinite;
}
@keyframes streamCursor{50%{opacity:0}}

/* ---------- Device/performance safeguards ---------- */
@media (max-width:720px), (prefers-reduced-motion:reduce){
  .bg-grid{animation:none}
  .blob{animation:none;opacity:.25}
  #particles{opacity:.55}
}
@media (max-width:480px){
  .header-right{gap:5px}
  .header .status{max-width:110px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
  .brand-text strong{letter-spacing:.12em}
  .composer{max-width:100%}
}