/* ═══════════════════════════════════════════════════════════════
   CIAE Neural Academy — CSS v25.0  (rewrite limpio)
   Una sola fuente de verdad · sin !important innecesarios
   Chat como protagonista · Dark theme · Mobile-native
═══════════════════════════════════════════════════════════════ */

/* ── RESET + VARIABLES ─────────────────────────────────────── */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}

:root{
  --c-bg:        #070f1c;
  --c-surface:   #0d1b2e;
  --c-surface2:  #111f33;
  --c-surface3:  #172640;
  --c-border:    rgba(96,165,250,.14);
  --c-border2:   rgba(96,165,250,.08);
  --c-text:      #e8f4ff;
  --c-text2:     #8aa8c8;
  --c-text3:     #506882;
  --c-blue:      #3b82f6;
  --c-blue2:     #60a5fa;
  --c-violet:    #8b5cf6;
  --c-cyan:      #22d3ee;
  --c-gold:      #f59e0b;
  --c-green:     #22c55e;
  --c-red:       #ef4444;
  --c-orange:    #f97316;
  --g-accent:    linear-gradient(135deg,#3b82f6,#8b5cf6);
  --g-gold:      linear-gradient(135deg,#f59e0b,#fb923c);
  --bubble-user-bg:  linear-gradient(145deg,#1d4ed8,#2563eb);
  --bubble-user-txt: #ffffff;
  --bubble-ai-bg:    #0f1e35;
  --bubble-ai-border:#1e3a5f;
  --bubble-ai-txt:   #e2efff;
  --sb-w:        260px;
  --topbar-h:    60px;
  --strip-h:     52px;
  --radius:      20px;
  --radius-sm:   12px;
  --shadow-sm:   0 4px 16px rgba(0,0,0,.35);
  --shadow-md:   0 12px 40px rgba(0,0,0,.45);
  --shadow-lg:   0 24px 80px rgba(0,0,0,.55);
  --font:        'Inter','Segoe UI',system-ui,-apple-system,sans-serif;
}

.cna-hidden{display:none!important}

/* ── LOGIN ── */
.cna-login{
  min-height:280px;display:flex;align-items:center;justify-content:center;
  background:radial-gradient(circle,rgba(59,130,246,.15),transparent),var(--c-bg);
  border-radius:var(--radius);font-family:var(--font);color:var(--c-text2);
  text-align:center;padding:40px;border:1px solid var(--c-border);
}
.cna-login-inner strong{display:block;font-size:18px;color:var(--c-text);margin:10px 0}

/* ══════════════════════════════════════════════
   WRAP & APP
══════════════════════════════════════════════ */
.cna-wrap{width:100%;margin:0;padding:0;font-family:var(--font);color:var(--c-text)}

.cna-app{
  background-color:#07111f;/* fallback sólido anti-tema-WP */
  display:grid;
  grid-template-columns:var(--sb-w) 1fr;
  height:var(--cna-available-h,calc(100dvh - 80px));
  max-height:var(--cna-available-h,calc(100dvh - 80px));
  min-height:520px;
  background:
    radial-gradient(ellipse at 15% 0%,  rgba(59,130,246,.22),transparent 35%),
    radial-gradient(ellipse at 85% 5%,  rgba(139,92,246,.18),transparent 30%),
    radial-gradient(ellipse at 50% 100%,rgba(34,211,238,.10),transparent 40%),
    linear-gradient(170deg,#070f1c 0%,#0c1a30 55%,#0f1228 100%);
  border-radius:var(--radius);
  overflow:hidden;
  border:1px solid rgba(255,255,255,.08);
  box-shadow:var(--shadow-lg);
  position:relative;
}
.cna-app::before{
  content:'';position:absolute;inset:0;pointer-events:none;z-index:0;
  background-image:
    linear-gradient(rgba(96,165,250,.04) 1px,transparent 1px),
    linear-gradient(90deg,rgba(96,165,250,.03) 1px,transparent 1px);
  background-size:48px 48px;
  mask-image:linear-gradient(to bottom,rgba(0,0,0,.5),transparent 60%);
}
.cna-sidebar,.cna-main{position:relative;z-index:1}

/* ══════════════════════════════════════════════
   SIDEBAR
══════════════════════════════════════════════ */
.cna-sidebar{
  width:var(--sb-w);
  background:#050c1a;
  backdrop-filter:blur(20px);
  border-right:1px solid var(--c-border2);
  display:flex;flex-direction:column;overflow:hidden;
  transition:transform .28s cubic-bezier(.4,0,.2,1);z-index:30;
}
.cna-sb-brand{
  display:flex;align-items:center;gap:10px;
  padding:14px 14px 12px;border-bottom:1px solid var(--c-border2);flex-shrink:0;
  background:linear-gradient(135deg,rgba(59,130,246,.10),transparent);
}
.cna-logo{
  width:40px;height:40px;flex:0 0 40px;border-radius:12px;background:#fff;
  display:grid;place-items:center;overflow:hidden;padding:3px;
  box-shadow:0 8px 20px rgba(0,0,0,.3);
}
.cna-logo img{width:100%;height:100%;object-fit:contain;border-radius:9px;display:block}
.cna-sb-brand-text strong{display:block;font-size:16px;color:#fff;line-height:1;letter-spacing:-.02em}
.cna-sb-brand-text small{display:block;font-size:10px;color:var(--c-text2);margin-top:2px;text-transform:uppercase;letter-spacing:.08em}
.cna-sb-close{display:none;background:none;border:none;color:var(--c-text2);font-size:18px;cursor:pointer;margin-left:auto;padding:4px 8px;border-radius:8px}
.cna-sb-close:hover{color:#fff;background:rgba(255,255,255,.1)}

.cna-sb-score{display:grid;grid-template-columns:repeat(3,1fr);gap:6px;padding:10px 12px 8px;flex-shrink:0}
.cna-sc-item{background:rgba(255,255,255,.06);border:1px solid var(--c-border2);border-radius:10px;padding:6px 4px;text-align:center}
.cna-sc-ic{display:block;font-size:14px}
.cna-sc-v{display:block;font-size:18px;font-weight:900;color:#fff;line-height:1;transition:transform .15s}
.cna-sc-v.bump{animation:score-bump .3s ease}
@keyframes score-bump{0%,100%{transform:scale(1)}50%{transform:scale(1.5)}}
.cna-sc-l{display:block;font-size:9px;color:var(--c-text3);text-transform:uppercase;margin-top:2px}

.cna-sb-user{display:flex;align-items:center;gap:8px;padding:8px 12px;border-bottom:1px solid var(--c-border2);flex-shrink:0}
.cna-userav{width:32px;height:32px;flex:0 0 32px;border-radius:50%;display:grid;place-items:center;font-weight:900;font-size:14px;color:#111827;background:linear-gradient(135deg,#fbbf24,#fb7185,#a78bfa)}
.cna-sb-user-info b{display:block;color:#fff;font-size:12px;line-height:1.2;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:168px}
.cna-sb-user-info small{color:var(--c-text2);font-size:10px}

.cna-sb-guides-head{display:flex;justify-content:space-between;align-items:center;padding:10px 14px 6px;flex-shrink:0}
.cna-sb-guides-head span{font-size:10px;font-weight:900;letter-spacing:.1em;color:var(--c-text3);text-transform:uppercase}
.cna-sb-count{background:rgba(59,130,246,.22);color:var(--c-blue2);border-radius:99px;padding:1px 8px;font-size:10px;font-weight:900}

.cna-sb-search{
  width:calc(100% - 24px);margin:0 12px 6px;height:36px;
  border-radius:10px;border:1px solid rgba(96,165,250,.25);
  background:rgba(255,255,255,.92);color:#111827;padding:0 12px;
  font-size:13px;outline:none;flex-shrink:0;font-family:var(--font);
  transition:border-color .2s,box-shadow .2s;
}
.cna-sb-search:focus{border-color:var(--c-blue);box-shadow:0 0 0 3px rgba(59,130,246,.2)}

.cna-guide-list{flex:1;overflow-y:auto;padding:2px 8px 8px;display:flex;flex-direction:column;gap:3px}
.cna-guide-list::-webkit-scrollbar{width:3px}
.cna-guide-list::-webkit-scrollbar-thumb{background:rgba(96,165,250,.25);border-radius:99px}
.cna-no-guides-msg{color:var(--c-text3);font-size:13px;padding:12px;text-align:center}

.cna-guide{
  width:100%;display:flex;align-items:center;gap:9px;
  padding:8px 9px;border-radius:10px;border:1px solid transparent;
  background:transparent;color:var(--c-text);cursor:pointer;
  text-align:left;transition:.15s ease;min-height:52px;
}
.cna-guide:hover{background:rgba(255,255,255,.07);transform:translateX(2px)}
.cna-guide.active{background:rgba(59,130,246,.16);box-shadow:inset 3px 0 0 var(--c-blue);border-color:rgba(59,130,246,.2)}
.cna-guide-av{width:34px;height:34px;flex:0 0 34px;border-radius:50%;display:grid;place-items:center;font-weight:900;font-size:14px;color:#fff}
.cna-av-max{background:linear-gradient(135deg,#22d3ee,#3b82f6)}
.cna-av-lia{background:linear-gradient(135deg,#f472b6,#8b5cf6)}
.cna-guide-info{flex:1;min-width:0}
.cna-guide-info b{display:block;color:#fff;font-size:12px;line-height:1.25;overflow:hidden;text-overflow:ellipsis;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical}
.cna-guide-info small{display:block;color:var(--c-text2);font-size:10px;margin-top:2px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.cna-guide-prog{flex:0 0 34px;text-align:right}
.cna-guide-pct-mini{font-size:10px;color:var(--c-blue2);font-weight:700}
.cna-guide-pct-bar{display:block;width:34px;height:3px;background:rgba(255,255,255,.1);border-radius:99px;margin-top:3px;overflow:hidden}
.cna-guide-pct-bar span{display:block;height:100%;background:var(--c-blue);border-radius:99px}

.cna-sb-nav{border-top:1px solid var(--c-border2);padding:8px;flex-shrink:0;display:flex;flex-direction:column;gap:3px}
.cna-sb-nav button{width:100%;background:rgba(255,255,255,.05);border:1px solid var(--c-border2);color:var(--c-text2);text-align:left;padding:8px 10px;border-radius:9px;font-size:12.5px;font-weight:700;cursor:pointer;transition:.15s;font-family:var(--font)}
.cna-sb-nav button:hover{background:rgba(255,255,255,.10);color:#fff;border-color:var(--c-border)}
.cna-badge{background:#ec4899;color:#fff;border-radius:99px;font-size:9px;font-weight:900;padding:1px 6px;margin-left:4px}

/* ══════════════════════════════════════════════
   MAIN
══════════════════════════════════════════════ */
.cna-main{display:flex;flex-direction:column;overflow:hidden;position:relative;min-width:0}

/* ── TOPBAR ── */
.cna-topbar{
  height:var(--topbar-h);flex:0 0 var(--topbar-h);
  display:flex;align-items:center;gap:12px;padding:0 16px;
  background:#07111f;border-bottom:1px solid var(--c-border2);
  backdrop-filter:blur(18px);z-index:10;
}
.cna-menu-btn{display:none;flex-direction:column;gap:5px;background:none;border:none;cursor:pointer;padding:6px;border-radius:8px;flex:0 0 auto}
.cna-menu-btn span{display:block;width:20px;height:2px;background:var(--c-text2);border-radius:2px}
.cna-topbar-guide{display:flex;align-items:center;gap:10px;flex:1;min-width:0}
.cna-topbar-tutor-av{width:36px;height:36px;flex:0 0 36px;border-radius:50%;background:linear-gradient(145deg,#2563eb,#7c3aed);display:grid;place-items:center;position:relative;box-shadow:0 0 0 3px rgba(59,130,246,.2),0 4px 12px rgba(0,0,0,.4)}
.cna-pulse-dot{width:8px;height:8px;border-radius:50%;background:var(--c-cyan);box-shadow:0 0 10px var(--c-cyan);animation:cna-blink 1.4s infinite;position:absolute;bottom:0;right:0;border:2px solid var(--c-bg)}
@keyframes cna-blink{50%{opacity:.25}}
.cna-topbar-info{flex:1;min-width:0}
.cna-topbar-info strong{display:block;color:#fff;font-size:14px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;letter-spacing:-.01em}
.cna-topbar-info small{color:var(--c-text2);font-size:11px}
.cna-topbar-right{display:flex;align-items:center;gap:10px;flex-shrink:0}
.cna-topbar-status{font-size:11px;color:var(--c-cyan);font-weight:700;background:rgba(34,211,238,.12);border:1px solid rgba(34,211,238,.2);border-radius:99px;padding:3px 10px;white-space:nowrap}
.cna-topbar-progress{display:flex;align-items:center;gap:7px}
.cna-progress-bar{width:70px;height:5px;background:rgba(255,255,255,.12);border-radius:99px;overflow:hidden}
.cna-progress-bar div{height:100%;background:var(--g-accent);border-radius:99px;transition:width .6s ease}
.cna-topbar-progress span{font-size:11px;font-weight:900;color:var(--c-blue2)}

/* ── MODE STRIP ── */
.cna-mode-strip{
  flex:0 0 auto;overflow-x:auto;overflow-y:hidden;
  background:#090f1d;border-bottom:1px solid var(--c-border2);
  scrollbar-width:none;backdrop-filter:blur(10px);
}
.cna-mode-strip::-webkit-scrollbar{display:none}
.cna-mode-chips{display:flex;gap:0;padding:0;flex-shrink:0}
.cna-mode-chips-modular{
  display:grid;
  grid-template-columns:minmax(320px,1.2fr) minmax(210px,.7fr) minmax(380px,1.3fr);
  align-items:stretch;gap:0;width:100%;
}
.cna-chip-group{
  display:flex;flex-wrap:wrap;align-content:center;align-items:center;
  gap:6px;padding:8px 12px;
  border-right:1px solid var(--c-border2);position:relative;
}
.cna-chip-group:last-child{border-right:0}
.cna-chip-group-label{
  display:block;width:100%;font-size:9px;font-weight:900;
  letter-spacing:.1em;text-transform:uppercase;color:var(--c-text3);
  padding-bottom:4px;pointer-events:none;
}
.cna-chip{
  border:1px solid rgba(255,255,255,.14);background:rgba(255,255,255,.07);
  color:var(--c-text);border-radius:99px;padding:5px 12px;font-size:12px;
  font-weight:800;cursor:pointer;transition:.15s;white-space:nowrap;
  font-family:var(--font);flex:0 0 auto;
}
.cna-chip:hover{background:rgba(255,255,255,.14);transform:translateY(-1px)}
.cna-chip.active-mode{transform:translateY(-1px);box-shadow:0 4px 14px rgba(0,0,0,.3)}

.cna-chip-y    {background:rgba(245,158,11,.18);border-color:rgba(245,158,11,.35);color:#fcd34d}
.cna-chip-o    {background:rgba(249,115,22,.18);border-color:rgba(249,115,22,.35);color:#fb923c}
.cna-chip-r    {background:rgba(239,68,68,.18);border-color:rgba(239,68,68,.32);color:#f87171}
.cna-chip-b    {background:rgba(59,130,246,.18);border-color:rgba(59,130,246,.35);color:#93c5fd}
.cna-chip-g    {background:rgba(34,197,94,.16);border-color:rgba(34,197,94,.32);color:#6ee7b7}
.cna-chip-fire {background:rgba(239,68,68,.20);border-color:rgba(249,115,22,.40);color:#fb923c;animation:chip-fire 2s ease-in-out infinite}
@keyframes chip-fire{50%{box-shadow:0 0 12px rgba(249,115,22,.4)}}
.cna-chip-p    {background:rgba(139,92,246,.18);border-color:rgba(139,92,246,.35);color:#c4b5fd}
.cna-chip-t    {background:rgba(34,211,238,.16);border-color:rgba(34,211,238,.30);color:#67e8f9}
.cna-chip-gray {background:rgba(100,116,139,.16);border-color:rgba(100,116,139,.28);color:#94a3b8}
.cna-chip-tool {background:rgba(255,255,255,.09);border-color:rgba(96,165,250,.28);color:var(--c-blue2)}

.cna-chip-y.active-mode  {background:#b45309;border-color:#f59e0b}
.cna-chip-o.active-mode  {background:#c2410c;border-color:#f97316}
.cna-chip-r.active-mode  {background:#b91c1c;border-color:#ef4444}
.cna-chip-b.active-mode  {background:#1d4ed8;border-color:#3b82f6}
.cna-chip-g.active-mode  {background:#15803d;border-color:#22c55e}
.cna-chip-fire.active-mode{background:#c2410c;border-color:#f97316}
.cna-chip-p.active-mode  {background:#6d28d9;border-color:#8b5cf6}
.cna-chip-t.active-mode  {background:#0e7490;border-color:#22d3ee}
.cna-chip-gray.active-mode{background:#374151;border-color:#6b7280}
.cna-chip-tool.active-mode{background:rgba(59,130,246,.28);border-color:var(--c-blue)}
.cna-chip-divider{width:1px;height:20px;background:var(--c-border2);margin:0 2px}

@media(min-width:861px){
  .cna-chip[data-help]{position:relative}
  .cna-chip[data-help]:hover::after{
    content:attr(data-help);position:absolute;left:0;top:calc(100% + 8px);width:220px;
    padding:9px 12px;border-radius:12px;background:var(--c-surface);color:var(--c-text);
    border:1px solid var(--c-border);box-shadow:var(--shadow-md);
    font-size:12px;line-height:1.4;white-space:normal;z-index:100;
    pointer-events:none;font-weight:500;
  }
}

/* ── WELCOME ── */
.cna-welcome{
  flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;
  gap:14px;padding:24px;text-align:center;animation:fade-up .5s ease forwards;
}
@keyframes fade-up{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:none}}
.cna-welcome-avatars{display:flex;align-items:flex-end;margin-bottom:6px}
.cna-welcome-av{width:88px;height:88px;border-radius:50%;overflow:hidden;background:rgba(5,12,26,.6);border:3px solid rgba(255,255,255,.1);position:relative;flex:0 0 88px}
.cna-welcome-av-lia{margin-left:-14px;border-color:rgba(139,92,246,.35)}
.cna-welcome-av-max{border-color:rgba(59,130,246,.35)}
.cna-welcome-av .av-svg-mini{position:absolute;width:200%;height:200%;top:-18%;left:-50%}
.cna-welcome h2{font-size:clamp(22px,3.5vw,36px);letter-spacing:-.03em;background:linear-gradient(90deg,#fff,#bfdbfe,#c4b5fd);-webkit-background-clip:text;background-clip:text;color:transparent}
.cna-welcome p{color:var(--c-text2);font-size:15px;max-width:560px;line-height:1.6}
.cna-welcome-sub-mob{display:none}
.cna-welcome-sub-desk{display:block}

/* ══════════════════════════════════════════════
   CHAT — protagonista
══════════════════════════════════════════════ */
.cna-chat{
  flex:1;overflow-y:auto;padding:18px 20px 8px;
  background:#070f1c;
  display:flex;flex-direction:column;gap:12px;
  scroll-behavior:smooth;overscroll-behavior:contain;
}
.cna-chat::-webkit-scrollbar{width:5px}
.cna-chat::-webkit-scrollbar-track{background:transparent}
.cna-chat::-webkit-scrollbar-thumb{background:rgba(96,165,250,.22);border-radius:99px}

/* ── MENSAJES ── */
.cna-msg-row{
  display:flex;gap:10px;align-items:flex-end;max-width:100%;
  animation:msg-in .2s cubic-bezier(.2,0,.3,1) both;
}
@keyframes msg-in{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:none}}
.cna-msg-row--user  {flex-direction:row-reverse;align-self:flex-end;max-width:74%}
.cna-msg-row--tutor {flex-direction:row;align-self:flex-start;max-width:84%}
.cna-msg-row--system{justify-content:center;align-self:center;max-width:100%}
.cna-msg-row--break {align-self:center;width:100%;max-width:620px}

/* Avatar */
.cna-msg-av{
  width:38px;height:38px;border-radius:50%;flex:0 0 38px;
  overflow:hidden;position:relative;
  background:#0a1628;border:2px solid rgba(255,255,255,.12);
  box-shadow:0 4px 12px rgba(0,0,0,.5);flex-shrink:0;
}
.cna-msg-av .av-svg-mini{position:absolute;width:200%;height:200%;top:-18%;left:-50%}
.cna-msg-av--max{border-color:rgba(59,130,246,.55);box-shadow:0 0 0 3px rgba(59,130,246,.14),0 4px 12px rgba(0,0,0,.5)}
.cna-msg-av--lia{border-color:rgba(139,92,246,.55);box-shadow:0 0 0 3px rgba(139,92,246,.14),0 4px 12px rgba(0,0,0,.5)}
.cna-app.is-speaking .cna-msg-av--active{animation:av-ring .65s ease-in-out infinite;border-color:var(--c-cyan)}
@keyframes av-ring{0%,100%{box-shadow:0 0 0 0 rgba(34,211,238,.5)}50%{box-shadow:0 0 0 7px rgba(34,211,238,.0)}}

/* Burbuja base */
.cna-msg-bubble{border-radius:20px;padding:13px 17px;font-size:14.5px;line-height:1.62;word-break:break-word;overflow-wrap:anywhere;position:relative}

/* USUARIO — azul intenso, protagonismo claro */
.cna-msg-row--user .cna-msg-bubble{
  background:linear-gradient(145deg,#1e56e8,#1a46cc);
  color:#fff;
  border-bottom-right-radius:4px;
  box-shadow:0 3px 0 #1238a8,0 10px 28px rgba(29,78,216,.4),inset 0 1px 0 rgba(255,255,255,.2);
  font-weight:500;
}
.cna-msg-row--user .cna-msg-bubble *{color:#fff}
.cna-msg-row--user .cna-msg-time{color:rgba(255,255,255,.45)}

/* TUTOR — oscuro con borde sutil, claramente diferente del usuario */
.cna-msg-row--tutor .cna-msg-bubble{
  background:#0f1e35;
  border:1px solid rgba(96,165,250,.2);
  border-bottom-left-radius:4px;
  color:#d8ecff;
  box-shadow:0 3px 0 #070f1c,0 10px 28px rgba(0,0,0,.3),inset 0 1px 0 rgba(255,255,255,.04);
}
.cna-msg-row--tutor .cna-msg-bubble.from-cache{border-color:rgba(34,197,94,.3)}

/* Header del tutor */
.cna-msg-header{display:flex;align-items:center;gap:7px;margin-bottom:8px}
.cna-msg-name{font-size:10px;font-weight:900;color:#60a5fa;text-transform:uppercase;letter-spacing:.08em}
.cna-source-cache{background:rgba(34,197,94,.2);color:#86efac;border-radius:99px;padding:1px 7px;font-size:9px;font-weight:900}
.cna-source-memory{background:rgba(139,92,246,.2);color:#c4b5fd;border-radius:99px;padding:1px 7px;font-size:9px;font-weight:900}
.cna-msg-time{font-size:10px;color:rgba(255,255,255,.25);margin-top:7px;text-align:right}

/* Sistema */
.cna-msg-row--system .cna-msg-bubble{background:#0a1525;border:1px solid rgba(96,165,250,.14);color:#7aa0c4;font-size:12px;text-align:center;border-radius:12px;padding:6px 16px}
.cna-msg-row--error .cna-msg-bubble{background:rgba(239,68,68,.12);border:1px solid rgba(239,68,68,.25);color:#fca5a5;border-radius:12px;font-size:13px}
.cna-msg-row--tutor .cna-msg-bubble.cna-game-card{background:#0c1a2e;border:1px solid rgba(96,165,250,.22)}

/* ── SCROLL DOWN ── */
.cna-scroll-down{position:absolute;bottom:150px;right:18px;z-index:15;width:38px;height:38px;border-radius:50%;background:var(--c-blue);border:none;color:#fff;font-size:18px;cursor:pointer;box-shadow:var(--shadow-sm);transition:.2s;display:grid;place-items:center}
.cna-scroll-down:hover{transform:scale(1.1);background:#2563eb}

/* ── LOADING ── */
.cna-loading{display:none;align-items:center;gap:10px;padding:9px 18px;color:var(--c-text2);font-size:13px;flex-shrink:0}
.cna-loading-av{width:32px;height:32px;border-radius:50%;background:rgba(59,130,246,.15);border:1px solid rgba(59,130,246,.3);display:grid;place-items:center;font-size:16px;animation:think-pulse 1s ease-in-out infinite}
@keyframes think-pulse{0%,100%{transform:scale(1)}50%{transform:scale(1.1)}}
.cna-loading-dots{display:flex;gap:5px}
.cna-loading-dots span{width:7px;height:7px;border-radius:50%;background:var(--c-blue2);animation:dot-bounce .85s infinite}
.cna-loading-dots span:nth-child(2){animation-delay:.14s}
.cna-loading-dots span:nth-child(3){animation-delay:.28s}
@keyframes dot-bounce{50%{transform:translateY(-5px);opacity:.35}}

/* ── VOICE WAVE ── */
.cna-voice-strip{display:none;align-items:center;justify-content:center;gap:4px;height:22px;padding:0 20px;flex-shrink:0}
.cna-voice-strip.active{display:flex}
.cna-voice-strip span{width:4px;border-radius:99px;background:linear-gradient(to top,var(--c-blue),var(--c-violet));height:4px}
.cna-voice-strip.active span{animation:voice-wave .5s infinite ease-in-out}
.cna-voice-strip span:nth-child(2){animation-delay:.07s}
.cna-voice-strip span:nth-child(3){animation-delay:.14s}
.cna-voice-strip span:nth-child(4){animation-delay:.21s}
.cna-voice-strip span:nth-child(5){animation-delay:.28s}
@keyframes voice-wave{45%{height:22px}75%{height:7px}}

/* ══════════════════════════════════════════════
   INPUT ZONE
══════════════════════════════════════════════ */
.cna-input-zone{
  flex:0 0 auto;padding:10px 14px 12px;
  background:#060d1a;
  border-top:1px solid rgba(96,165,250,.1);
  backdrop-filter:blur(20px);
}
.cna-input-hint{
  font-size:11px;color:var(--c-text3);
  margin-bottom:6px;padding:0 2px;line-height:1.4;
}
.cna-input-row{display:flex;gap:8px;align-items:flex-end;margin-bottom:7px}
.cna-input-row textarea{
  flex:1;min-height:44px;max-height:120px;resize:none;
  border:1.5px solid rgba(96,165,250,.22);
  background:#ffffff;
  color:#0f1c30;border-radius:16px;padding:11px 15px;font-size:14px;
  font-family:var(--font);outline:none;
  transition:border-color .2s,box-shadow .2s;line-height:1.4;
  box-shadow:0 2px 8px rgba(0,0,0,.2);
}
.cna-input-row textarea::placeholder{color:#8a9ab0;font-weight:400}
.cna-input-row textarea:focus{
  border-color:#3b82f6;
  box-shadow:0 0 0 3px rgba(59,130,246,.2),0 2px 8px rgba(0,0,0,.2);
}
.cna-send-btn{
  width:44px;height:44px;border-radius:14px;border:none;flex:0 0 44px;
  background:linear-gradient(145deg,#2563eb,#1d4ed8);color:#fff;
  cursor:pointer;display:grid;place-items:center;transition:.15s;
  box-shadow:0 3px 0 #1238a8,0 6px 16px rgba(29,78,216,.35);
}
.cna-send-btn:hover{transform:translateY(-1px);box-shadow:0 4px 0 #1238a8,0 8px 20px rgba(29,78,216,.45)}
.cna-send-btn:active{transform:translateY(1px);box-shadow:0 1px 0 #1238a8}
.cna-input-actions{display:flex;gap:6px;flex-wrap:wrap;align-items:center}
.cna-act-btn{
  height:30px;padding:0 10px;border-radius:8px;
  border:1px solid rgba(96,165,250,.18);
  background:rgba(255,255,255,.06);color:var(--c-text2);
  font-size:12.5px;cursor:pointer;transition:.14s;
  display:inline-flex;align-items:center;text-decoration:none;font-family:var(--font);
}
.cna-act-btn:hover{background:rgba(255,255,255,.13);color:#e0f0ff;border-color:rgba(96,165,250,.35)}
.cna-btn-stop.active{background:rgba(239,68,68,.18);border-color:rgba(239,68,68,.4);color:#fca5a5}

/* ── REACCIÓN ── */
.cna-reaction{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);z-index:50;font-size:60px;pointer-events:none;opacity:0}
.cna-reaction.show{animation:reaction-pop .85s cubic-bezier(.34,1.56,.64,1) forwards}
@keyframes reaction-pop{0%{opacity:0;transform:translate(-50%,-65%) scale(.4)}40%{opacity:1;transform:translate(-50%,-75%) scale(1.35)}70%{opacity:1;transform:translate(-50%,-85%) scale(1)}100%{opacity:0;transform:translate(-50%,-105%) scale(.8)}}

/* ── AVATAR ANIMATIONS ── */
.av-breathe{animation:av-idle-breathe 3.6s ease-in-out infinite;transform-box:fill-box;transform-origin:bottom center}
@keyframes av-idle-breathe{0%,100%{transform:translateY(0)}50%{transform:translateY(-6px)}}
.av-eyelid{transform-box:fill-box;transform-origin:center top;transform:scaleY(0);animation:av-blink-cycle 6s ease-in-out infinite}
.av-eyelid-r{animation-delay:.05s}
@keyframes av-blink-cycle{0%,87%,100%{transform:scaleY(0)}91%,94%{transform:scaleY(1)}}
.av-mouth-smile{opacity:1}
.av-mouth-talk{opacity:0;transform-box:fill-box;transform-origin:top center}
.cna-app.is-speaking .av-mouth-smile{opacity:0}
.cna-app.is-speaking .av-mouth-talk{opacity:1;animation:av-talk-open .22s ease-in-out infinite alternate}
@keyframes av-talk-open{0%{transform:scaleY(.2)}100%{transform:scaleY(1)}}
.cna-app.is-thinking .av-breathe{animation:av-think-bob 1s ease-in-out infinite}
@keyframes av-think-bob{0%,100%{transform:translateY(0)}50%{transform:translateY(-3px)}}

/* ── VISUAL STRIP ── */
.cna-visual-strip{display:flex;align-items:center;justify-content:center;gap:6px;flex-wrap:wrap;padding:7px 12px;margin:0 12px 6px;border-radius:14px;background:rgba(255,255,255,.06);border:1px solid var(--c-border2)}
.cna-visual-strip span{font-size:11px;font-weight:800;letter-spacing:.02em;color:var(--c-text2);background:rgba(255,255,255,.08);border:1px solid var(--c-border2);padding:4px 9px;border-radius:99px;white-space:nowrap}
.cna-visual-pulse .cna-topbar-tutor-av,.cna-visual-pulse .cna-msg-av--active{animation:cnaVisualPulse .65s ease both}
@keyframes cnaVisualPulse{0%{transform:scale(1)}45%{transform:scale(1.06);filter:drop-shadow(0 0 16px rgba(59,130,246,.55))}100%{transform:scale(1)}}

/* ── OVERLAY VIEW ── */
.cna-overlay-view{position:absolute;inset:0;z-index:40;background:rgba(7,15,28,.96);overflow-y:auto;padding:24px;backdrop-filter:blur(10px);animation:overlay-in .22s ease;color:var(--c-text)}
@keyframes overlay-in{from{opacity:0}to{opacity:1}}
.cna-overlay-close{background:rgba(255,255,255,.08);border:1px solid var(--c-border);color:var(--c-text);border-radius:10px;padding:7px 16px;cursor:pointer;font-size:13px;font-weight:700;margin-bottom:16px;display:inline-flex;align-items:center;gap:6px;font-family:var(--font)}
.cna-overlay-close:hover{background:rgba(255,255,255,.14)}

/* ── BREAK CARD ── */
.cna-break-card{background:linear-gradient(135deg,#0f172a,#1e1b4b 50%,#0f172a);border:1px solid rgba(139,92,246,.3);border-radius:20px;padding:20px 22px;overflow:hidden;position:relative;animation:break-appear .6s cubic-bezier(.34,1.56,.64,1) forwards;width:100%}
@keyframes break-appear{from{opacity:0;transform:translateY(14px) scale(.97)}to{opacity:1;transform:none}}
.cna-break-card::after{content:'';position:absolute;bottom:-40px;left:-40px;width:160px;height:160px;background:radial-gradient(circle,rgba(139,92,246,.15),transparent 70%);pointer-events:none}
.cna-break-top{display:flex;align-items:center;gap:14px;margin-bottom:14px}
.cna-break-moon{font-size:36px;animation:moon-float 3s ease-in-out infinite;flex:0 0 auto}
@keyframes moon-float{0%,100%{transform:translateY(0)}50%{transform:translateY(-5px)}}
.cna-break-title{margin:0 0 3px;color:#e0e7ff;font-size:19px;font-weight:900}
.cna-break-sub{margin:0;color:#a5b4fc;font-size:13px}
.cna-break-fact{display:flex;align-items:flex-start;gap:10px;background:rgba(139,92,246,.10);border:1px solid rgba(139,92,246,.18);border-radius:12px;padding:11px;margin-bottom:10px;color:#ddd6fe;font-size:13px;line-height:1.55}
.cna-break-fact-icon{font-size:20px;flex:0 0 auto}
.cna-break-challenge{display:flex;align-items:flex-start;gap:10px;background:rgba(34,197,94,.08);border:1px solid rgba(34,197,94,.16);border-radius:12px;padding:11px;margin-bottom:12px;color:#bbf7d0;font-size:13px;line-height:1.55}
.cna-break-challenge-icon{font-size:18px;flex:0 0 auto}
.cna-break-footer{display:flex;justify-content:space-between;align-items:center;padding-top:10px;border-top:1px solid rgba(255,255,255,.07);color:#94a3b8;font-size:12px}
.cna-break-footer strong{color:#fbbf24}
.cna-break-badge{background:linear-gradient(135deg,#7c3aed,#4f46e5);color:#e0e7ff;border-radius:99px;padding:4px 12px;font-size:11px;font-weight:800}

/* ── MAILBOX ── */
.cna-mailbox{color:var(--c-text)}
.cna-mailbox h2{color:#fff;margin:0 0 14px}
.cna-mail-item{border:1px solid var(--c-border);background:rgba(255,255,255,.06);border-radius:12px;padding:12px;margin:8px 0}
.cna-mail-unread{border-color:rgba(96,165,250,.4);background:rgba(59,130,246,.10)}
.cna-mail-header{display:flex;justify-content:space-between;margin-bottom:6px}
.cna-mail-header strong{color:#fff;font-size:14px}
.cna-mail-header small{color:var(--c-text2);font-size:11px}
.cna-mail-body{color:var(--c-text2);font-size:13px;line-height:1.6}

/* ── HELP / TUTORIAL ── */
.cna-help-hero{border:1px solid rgba(255,255,255,.12);border-radius:22px;padding:22px;background:linear-gradient(135deg,rgba(59,130,246,.2),rgba(139,92,246,.15),rgba(245,158,11,.12));box-shadow:var(--shadow-md);margin-bottom:16px}
.cna-help-hero h2{margin:0 0 8px;color:#fff;font-size:28px;letter-spacing:-.03em}
.cna-help-hero p{margin:0;color:var(--c-text2)}
.cna-help-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:12px;margin-top:14px}
.cna-help-card{border:1px solid var(--c-border);border-radius:18px;background:rgba(255,255,255,.06);padding:16px;box-shadow:var(--shadow-sm);transition:.18s ease}
.cna-help-card:hover{transform:translateY(-2px);border-color:rgba(96,165,250,.35)}
.cna-help-card .ic{font-size:26px;display:block;margin-bottom:8px}
.cna-help-card strong{display:block;color:#fff;font-size:15px;margin-bottom:5px}
.cna-help-card small{color:var(--c-text2);line-height:1.45;font-size:13px}
.cna-help-steps{counter-reset:paso;margin-top:16px;display:grid;gap:9px}
.cna-help-step{counter-increment:paso;display:flex;gap:12px;align-items:flex-start;background:rgba(255,255,255,.06);border:1px solid var(--c-border);border-radius:16px;padding:13px;color:var(--c-text2)}
.cna-help-step::before{content:counter(paso);width:28px;height:28px;display:grid;place-items:center;border-radius:50%;background:var(--g-accent);color:#fff;font-weight:900;flex:0 0 28px;font-size:13px}
.cna-help-step b{color:#fff}

/* ── TOOL RESULT ── */
.cna-tool-result{background:rgba(13,27,46,.85);border:1px solid var(--c-border);border-radius:20px;overflow:hidden;color:var(--c-text);box-shadow:var(--shadow-md)}
.cna-tool-result-head{display:flex;align-items:center;gap:13px;padding:16px 18px;background:rgba(255,255,255,.06);border-bottom:1px solid var(--c-border2)}
.cna-tool-result-ic{width:44px;height:44px;border-radius:14px;display:grid;place-items:center;background:rgba(59,130,246,.2);font-size:22px}
.cna-tool-result-head h3{margin:0;color:#fff;font-size:17px;font-weight:900;letter-spacing:-.02em}
.cna-tool-result-head p{margin:3px 0 0;color:var(--c-text2);font-size:13px}
.cna-tool-result-body{padding:16px 18px;font-size:14.5px;line-height:1.65;color:var(--c-text)}
.cna-tool-result-body h3{margin:0 0 10px;color:#fff;font-size:17px;font-weight:900}
.cna-tool-result-body ul,.cna-tool-result-body ol{padding-left:20px;margin:10px 0}
.cna-tool-result-body li{margin:6px 0}
.cna-tool-result-body table{width:100%;border-collapse:separate;border-spacing:0;border-radius:12px;border:1px solid var(--c-border);overflow:hidden;margin:12px 0}
.cna-tool-result-body th{background:rgba(59,130,246,.15);color:#fff;text-align:left;font-weight:900;padding:10px;border-bottom:1px solid var(--c-border)}
.cna-tool-result-body td{padding:10px;border-bottom:1px solid var(--c-border2);color:var(--c-text2);vertical-align:top}
.cna-tool-result-body tr:last-child td{border-bottom:0}
.cna-tool-result-foot{padding:10px 16px;background:rgba(255,255,255,.04);border-top:1px solid var(--c-border2);font-size:12px;color:var(--c-text3)}

/* ── STUDY CARD ── */
.cna-study-card{max-width:900px;margin:0 auto;color:var(--c-text)}
.cna-study-card-head{display:flex;align-items:center;gap:14px;padding:16px;border-radius:20px;background:linear-gradient(135deg,rgba(59,130,246,.30),rgba(139,92,246,.28),rgba(245,158,11,.18));border:1px solid rgba(255,255,255,.14);box-shadow:var(--shadow-md)}
.cna-study-card-head>span{font-size:34px;filter:drop-shadow(0 6px 16px rgba(0,0,0,.3))}
.cna-study-card-head h2{margin:0;color:#fff;font-size:22px;line-height:1.15;letter-spacing:-.02em}
.cna-study-card-head p{margin:4px 0 0;color:var(--c-text2);font-size:14px}
.cna-study-card-body{margin-top:12px;padding:18px;border-radius:18px;background:rgba(255,255,255,.07);border:1px solid var(--c-border);line-height:1.7;font-size:14.5px;color:var(--c-text)}
.cna-study-card-tips{margin-top:10px;padding:13px 15px;border-radius:14px;background:rgba(34,197,94,.10);border:1px solid rgba(34,197,94,.2);color:#bbf7d0;font-size:13.5px}
.cna-act-btn[data-cna-study-card]{background:var(--g-gold);color:#fff;border-color:rgba(245,158,11,.4)}

/* ── MODERATION / PRECHAT ── */
.cna-moderation-card,.cna-prechat-card{background:rgba(13,27,46,.8);border:1px solid var(--c-border);border-left:4px solid var(--c-blue);border-radius:16px;padding:14px 16px;color:var(--c-text);box-shadow:var(--shadow-sm);line-height:1.55;max-width:100%;overflow-wrap:anywhere}
.cna-moderation-card strong,.cna-prechat-card strong{color:#fff;display:block;margin-bottom:6px}
.cna-moderation-card small,.cna-prechat-card small{color:var(--c-text2);display:block;margin-top:8px;font-weight:600}
.cna-moderation-card--warning{border-left-color:var(--c-gold)}
.cna-moderation-card--grave{border-left-color:var(--c-red)}
.cna-moderation-card--grave strong{color:#fca5a5}

/* ── POLICY MODAL ── */
/* Desktop: centrado sobre la app */
.cna-policy-modal{
  position:fixed;inset:0;z-index:9999;
  display:none;align-items:center;justify-content:center;
  padding:22px;
  background:rgba(5,10,22,.82);
  backdrop-filter:blur(18px);
}
.cna-policy-modal.show{display:flex}

/* Card: flex column fijo — head + body scroll + footer siempre visible */
.cna-policy-card{
  width:min(680px,94vw);
  max-height:min(88vh,760px);
  background:#0d1b2e;
  border:1px solid rgba(96,165,250,.18);
  border-radius:24px;
  box-shadow:0 30px 80px rgba(0,0,0,.6);
  color:var(--c-text);
  display:flex;flex-direction:column;
  overflow:hidden;/* NO overflow:auto — el scroll va solo en el body */
}
.cna-policy-head{
  flex-shrink:0;
  display:flex;gap:14px;align-items:center;
  padding:20px 22px 16px;
  border-bottom:1px solid rgba(96,165,250,.12);
  background:linear-gradient(135deg,rgba(59,130,246,.1),transparent);
}
.cna-policy-icon{width:48px;height:48px;border-radius:16px;display:grid;place-items:center;background:rgba(59,130,246,.2);font-size:24px;flex:0 0 auto}
.cna-policy-head h2{margin:0;color:#fff;font-size:20px;line-height:1.2;letter-spacing:-.02em}
.cna-policy-head p{margin:4px 0 0;color:var(--c-text2);font-size:12px}

/* Body: único elemento scrollable */
.cna-policy-body{
  flex:1;overflow-y:auto;
  -webkit-overflow-scrolling:touch;
  padding:18px 22px 12px;
  font-size:14px;line-height:1.65;color:var(--c-text2);
}
.cna-policy-body::-webkit-scrollbar{width:4px}
.cna-policy-body::-webkit-scrollbar-thumb{background:rgba(96,165,250,.3);border-radius:99px}
.cna-policy-body p{margin:0 0 10px}
.cna-policy-body ul{margin:8px 0 12px;padding-left:18px}
.cna-policy-body li{margin:6px 0}
.cna-policy-warning{
  border:1px solid rgba(59,130,246,.25);
  background:rgba(59,130,246,.1);
  border-radius:12px;padding:11px 14px;
  color:var(--c-text);font-weight:700;margin:12px 0 0;
}

/* Footer: SIEMPRE visible, nunca se scroll-ea */
.cna-policy-footer{
  flex-shrink:0;
  padding:14px 22px;
  border-top:1px solid rgba(96,165,250,.12);
  background:#0a1525;
  display:flex;flex-direction:column;gap:10px;
}
.cna-policy-check{
  display:flex;align-items:center;gap:10px;
  background:rgba(255,255,255,.06);
  border:1px solid rgba(96,165,250,.18);
  border-radius:12px;padding:11px 14px;
  font-weight:800;font-size:14px;color:#fff;cursor:pointer;
}
.cna-policy-check input{width:18px;height:18px;accent-color:var(--c-blue);flex:0 0 auto}
.cna-policy-accept{
  border:0;border-radius:13px;
  padding:13px 22px;
  font-weight:900;font-size:15px;
  color:#fff;background:linear-gradient(135deg,#2563eb,#1d4ed8);
  box-shadow:0 3px 0 #1238a8,0 8px 24px rgba(29,78,216,.35);
  cursor:pointer;transition:.15s ease;
  font-family:var(--font);width:100%;
}
.cna-policy-accept:disabled{
  opacity:.35;cursor:not-allowed;
  background:#1e3a5f;box-shadow:none;
}
.cna-policy-accept:not(:disabled):hover{transform:translateY(-1px)}
.cna-policy-accept:not(:disabled):active{transform:translateY(1px);box-shadow:0 1px 0 #1238a8}
.cna-policy-locked .cna-main,.cna-policy-locked .cna-sidebar{filter:blur(1px)}
/* Ocultar bottom nav mientras el modal de política está activo */
.cna-policy-locked~.cna-bnav,
body:has(.cna-policy-locked) .cna-bnav{display:none!important}

/* ── ADMIN INCIDENTS ── */
.cna-admin-incidents{color:var(--c-text)}
.cna-admin-incidents .cna-b-pendiente{background:rgba(245,158,11,.15);color:#fcd34d;border:1px solid rgba(245,158,11,.3);padding:3px 10px;border-radius:99px}
.cna-admin-incidents .cna-b-revisado{background:rgba(34,197,94,.14);color:#6ee7b7;border:1px solid rgba(34,197,94,.3);padding:3px 10px;border-radius:99px}
.cna-admin-incidents .cna-b-cerrado{background:rgba(59,130,246,.14);color:#93c5fd;border:1px solid rgba(59,130,246,.3);padding:3px 10px;border-radius:99px}

/* ══════════════════════════════════════════════
   TABLET ≤ 1100px
══════════════════════════════════════════════ */
@media(max-width:1100px){
  :root{--sb-w:220px}
}
@media(min-width:861px) and (max-width:1100px){
  .cna-mode-chips-modular{grid-template-columns:1fr 1fr}
  .cna-chip-group:last-child{grid-column:1/-1}
}

/* ══════════════════════════════════════════════
   MOBILE ≤ 860px
══════════════════════════════════════════════ */
@media(max-width:860px){

  html,body{max-width:100%;overflow-x:hidden}

  .cna-wrap{
    margin-left:calc(50% - 50vw);
    margin-right:calc(50% - 50vw);
    width:100vw;max-width:100vw;
    padding:0;overflow-x:hidden;
  }

  .cna-app{
    grid-template-columns:1fr;
    height:100dvh;min-height:100dvh;max-height:100dvh;
    border-radius:0;border:none;box-shadow:none;
    padding-bottom:64px;overflow:hidden;
  }

  /* Sidebar → bottom sheet */
  .cna-sidebar{
    position:fixed;
    left:0;right:0;
    bottom:0;
    width:100%;max-width:100%;
    height:calc(80vh - 0px);max-height:80vh;
    border-radius:20px 20px 0 0;
    transform:translateY(100%);
    transition:transform .32s cubic-bezier(.4,0,.2,1);
    z-index:500;/* Encima de todo: overlay(210), bnav(200) */
    box-shadow:0 -8px 60px rgba(0,0,0,.65);
    padding-top:14px;
    padding-bottom:env(safe-area-inset-bottom,0px);
  }
  .cna-sidebar.open{transform:translateY(0)}
  .cna-sidebar::before{content:'';position:absolute;top:7px;left:50%;transform:translateX(-50%);width:40px;height:4px;background:rgba(255,255,255,.28);border-radius:99px}
  .cna-sb-close{display:flex}
  .cna-main{grid-column:1}

  .cna-topbar{height:56px;flex:0 0 56px;padding:0 12px;gap:10px;background:rgba(5,12,26,.98);border-bottom:1px solid rgba(255,255,255,.07)}
  .cna-menu-btn{display:none}
  .cna-topbar-status{display:none}
  .cna-topbar-progress{display:flex;gap:5px}
  .cna-progress-bar{width:52px}

  .cna-mode-strip{display:none}

  .cna-welcome{gap:10px;padding:20px 16px}
  .cna-welcome h2{font-size:20px}
  .cna-welcome-sub-desk{display:none}
  .cna-welcome-sub-mob{display:block;font-size:13px;color:var(--c-text2);text-align:center}
  .cna-welcome-av{width:68px;height:68px;flex:0 0 68px}

  .cna-chat{flex:1 1 0;min-height:0;padding:12px 12px 8px;overflow-y:auto;-webkit-overflow-scrolling:touch}
  .cna-msg-row--user,.cna-msg-row--tutor{max-width:94%}
  .cna-msg-bubble{font-size:14.5px;padding:11px 14px;border-radius:18px}
  .cna-msg-av{width:32px;height:32px;flex:0 0 32px}

  /* Input zone flotante */
  .cna-input-zone{
    position:fixed;left:10px;right:10px;
    bottom:calc(68px + env(safe-area-inset-bottom,0px));
    z-index:260;padding:10px;border-radius:22px;
    background:rgba(5,12,26,.96);
    border:1px solid rgba(96,165,250,.2);
    box-shadow:0 -8px 32px rgba(0,0,0,.5),0 12px 32px rgba(0,0,0,.3);
    backdrop-filter:blur(20px);
    width:auto;max-width:calc(100vw - 20px);
  }
  .cna-input-hint{display:block;margin:0 0 7px;padding:7px 10px;background:rgba(255,255,255,.07);border-radius:10px;font-size:11.5px;color:var(--c-text2);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
  .cna-input-row{display:grid;grid-template-columns:1fr 46px;gap:8px;align-items:end;margin-bottom:7px}
  .cna-input-row textarea{font-size:16px;min-height:46px;max-height:108px;padding:12px;border-radius:16px;line-height:1.35;background:rgba(255,255,255,.96);color:#111827}
  .cna-send-btn{width:46px;height:46px;flex:0 0 46px;border-radius:14px}
  .cna-input-actions{display:flex;flex-wrap:nowrap;gap:6px;overflow-x:auto;-webkit-overflow-scrolling:touch;scrollbar-width:none}
  .cna-input-actions::-webkit-scrollbar{display:none}
  .cna-act-btn{width:36px;height:36px;flex:0 0 36px;padding:0;justify-content:center;border-radius:10px;font-size:16px;touch-action:manipulation}

  /* ── BOTTOM NAV ── */
  .cna-bnav{
    position:fixed;bottom:0;left:0;right:0;height:64px;
    background:rgba(5,12,26,.98);
    border-top:1px solid rgba(96,165,250,.14);
    display:flex;align-items:stretch;z-index:200;
    padding-bottom:env(safe-area-inset-bottom,0px);
    backdrop-filter:blur(24px);
  }
  .cna-bnav-btn{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:3px;border:none;background:transparent;cursor:pointer;touch-action:manipulation;color:rgba(255,255,255,.38);font-family:var(--font);transition:.14s;padding:0 4px}
  .cna-bnav-btn.active{color:var(--c-blue2)}
  .cna-bnav-btn:active{transform:scale(.92)}
  .cna-bnav-ic{font-size:22px;line-height:1}
  .cna-bnav-lbl{font-size:10.5px;font-weight:800;letter-spacing:.02em}
  .cna-bnav-btn.active .cna-bnav-ic{background:rgba(59,130,246,.18);border-radius:10px;padding:2px 12px}

  /* ── MODE SHEET ── */
  .cna-mode-sheet{
    position:fixed;inset:auto 0 0 0;z-index:500;
    background:linear-gradient(180deg,#0d1b2e 0%,#070f1c 100%);
    border-radius:22px 22px 0 0;transform:translateY(100%);
    transition:transform .32s cubic-bezier(.4,0,.2,1);
    box-shadow:0 -8px 60px rgba(0,0,0,.65);max-height:86vh;
    display:flex;flex-direction:column;overflow:hidden;
  }
  .cna-mode-sheet.open{transform:translateY(0)}
  .cna-mode-sheet::before{content:'';display:block;width:40px;height:4px;background:rgba(255,255,255,.28);border-radius:99px;margin:12px auto 4px;flex-shrink:0}
  .cna-mode-sheet-head{padding:0 16px 10px;display:flex;justify-content:space-between;align-items:center;flex-shrink:0}
  .cna-mode-sheet-title{color:#fff;font-size:17px;font-weight:900}
  .cna-mode-sheet-close{background:rgba(255,255,255,.10);border:none;color:#fff;border-radius:50%;width:30px;height:30px;font-size:14px;display:grid;place-items:center;cursor:pointer;touch-action:manipulation}
  .cna-mode-sheet-body{overflow-y:auto;padding:0 12px 16px;flex:1}
  .cna-mode-sheet-body::-webkit-scrollbar{display:none}

  .cna-ms-tabs{display:flex;gap:6px;padding:2px 0 10px}
  .cna-ms-tab{flex:1;padding:8px;border-radius:10px;border:none;background:rgba(255,255,255,.07);color:rgba(255,255,255,.5);font-size:13px;font-weight:800;cursor:pointer;font-family:var(--font);transition:.15s;touch-action:manipulation}
  .cna-ms-tab.active{background:rgba(59,130,246,.24);border:1.5px solid rgba(59,130,246,.45);color:#fff}

  .cna-ms-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:8px}
  .cna-ms-grid.hidden{display:none}
  .cna-ms-btn{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:4px;padding:14px 6px;border-radius:16px;border:none;cursor:pointer;font-family:var(--font);transition:.16s;min-height:84px;touch-action:manipulation}
  .cna-ms-btn:active{transform:scale(.93)}
  .cna-ms-btn .ic{font-size:26px;line-height:1}
  .cna-ms-btn .nm{font-size:12.5px;font-weight:900;color:#fff;line-height:1.1;text-align:center}
  .cna-ms-btn .sm{font-size:10px;color:rgba(255,255,255,.72);text-align:center;line-height:1.2}

  .cna-ms-y   {background:linear-gradient(145deg,#f59e0b,#d97706);box-shadow:0 5px 16px rgba(245,158,11,.35)}
  .cna-ms-o   {background:linear-gradient(145deg,#f97316,#ea580c);box-shadow:0 5px 16px rgba(249,115,22,.35)}
  .cna-ms-r   {background:linear-gradient(145deg,#ef4444,#dc2626);box-shadow:0 5px 16px rgba(239,68,68,.35)}
  .cna-ms-b   {background:linear-gradient(145deg,#3b82f6,#2563eb);box-shadow:0 5px 16px rgba(59,130,246,.35)}
  .cna-ms-g   {background:linear-gradient(145deg,#22c55e,#16a34a);box-shadow:0 5px 16px rgba(34,197,94,.35)}
  .cna-ms-fire{background:linear-gradient(145deg,#ef4444,#f97316);box-shadow:0 5px 20px rgba(239,68,68,.45);animation:fire-pulse 2s ease-in-out infinite}
  @keyframes fire-pulse{50%{box-shadow:0 5px 28px rgba(239,68,68,.55)}}
  .cna-ms-p   {background:linear-gradient(145deg,#8b5cf6,#7c3aed);box-shadow:0 5px 16px rgba(139,92,246,.35)}
  .cna-ms-t   {background:linear-gradient(145deg,#22d3ee,#0891b2);box-shadow:0 5px 16px rgba(34,211,238,.35)}
  .cna-ms-gray{background:linear-gradient(145deg,#64748b,#475569);box-shadow:0 5px 13px rgba(100,116,139,.3)}
  .cna-ms-ta  {background:linear-gradient(145deg,#6366f1,#4f46e5);box-shadow:0 5px 16px rgba(99,102,241,.35)}
  .cna-ms-tb  {background:linear-gradient(145deg,#22d3ee,#0891b2);box-shadow:0 5px 16px rgba(6,182,212,.35)}
  .cna-ms-tc  {background:linear-gradient(145deg,#fbbf24,#d97706);box-shadow:0 5px 16px rgba(251,191,36,.35)}
  .cna-ms-td  {background:linear-gradient(145deg,#4ade80,#16a34a);box-shadow:0 5px 16px rgba(74,222,128,.35)}
  .cna-ms-te  {background:linear-gradient(145deg,#c084fc,#9333ea);box-shadow:0 5px 16px rgba(192,132,252,.35)}
  .cna-ms-tf  {background:linear-gradient(145deg,#f87171,#dc2626);box-shadow:0 5px 16px rgba(248,113,113,.35)}

  .cna-sheet-overlay{
    position:fixed;inset:0;
    z-index:210;/* encima del bnav (200), MUY por debajo del sidebar (350) */
    background:rgba(0,0,0,.55);
    backdrop-filter:blur(3px);
    opacity:0;pointer-events:none;transition:opacity .32s;
  }
  .cna-sheet-overlay.show{opacity:1;pointer-events:all}

  .cna-sidebar .cna-guide-list{flex:1 1 0;min-height:0;overflow-y:auto;-webkit-overflow-scrolling:touch}

  .cna-scroll-down{right:14px;bottom:calc(128px + env(safe-area-inset-bottom,0px));z-index:270}

  .cna-chip[data-help]:hover::after{display:none}
  .cna-tool-result-body table{display:block;overflow-x:auto;-webkit-overflow-scrolling:touch}
  .cna-help-grid{grid-template-columns:1fr}
  .cna-help-hero h2{font-size:22px}
  .cna-overlay-view{padding:16px}
  /* Policy modal mobile: bottom sheet */
  .cna-policy-modal{
    position:fixed;inset:0;
    padding:0;align-items:flex-end;z-index:10000;
  }
  .cna-policy-card{
    width:100%;
    /* La card ocupa hasta el top del bnav (64px) + safe area */
    max-height:calc(100dvh - 64px - env(safe-area-inset-bottom,0px));
    border-radius:22px 22px 0 0;
  }
  .cna-policy-head{padding:16px 16px 12px}
  .cna-policy-head h2{font-size:18px}
  .cna-policy-body{padding:12px 16px 8px}
  .cna-policy-footer{
    /* El footer se posiciona justo encima del bnav */
    padding:12px 16px 16px;
  }

  input[type="text"],input[type="search"],textarea{font-size:16px}
  button,.cna-guide,.cna-act-btn,.cna-send-btn{touch-action:manipulation}
}

/* ══════════════════════════════════════════════
   ≤ 400px
══════════════════════════════════════════════ */
@media(max-width:400px){
  .cna-topbar-info strong{font-size:13px}
  .cna-ms-btn{min-height:76px;padding:10px 4px}
  .cna-ms-btn .ic{font-size:22px}
  .cna-ms-btn .nm{font-size:11.5px}
  .cna-msg-bubble{font-size:14px}
  .cna-input-zone{left:8px;right:8px;max-width:calc(100vw - 16px);padding:8px}
}

/* ── Teclado visible ── */
@media(max-height:640px) and (max-width:860px){
  .cna-input-hint{display:none}
}