/* ─────────────────────────────────────────────────────────────
   KIAI — Private Intelligence System
   UI/UX: Mobile-first dark command-center
   Applied: UI/UX Pro Max + taste-skill principles
   Aesthetic: Precision tool. Not consumer. Not generic.
   VARIANCE:6  MOTION:3  DENSITY:4
   Typography: Syne 800 (headings) / DM Mono 400 (body/code)
   Palette: #0a0a0f base / #00e676 accent / #8888a0 muted
───────────────────────────────────────────────────────────── */

/* ── Reset ──────────────────────────────────────────────────── */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0;-webkit-tap-highlight-color:transparent}
html{font-size:16px;-webkit-text-size-adjust:100%;scroll-behavior:smooth}

/* ── Tokens ─────────────────────────────────────────────────── */
:root{
  --bg-0:          #0a0a0f;
  --bg-1:          #101018;
  --bg-2:          #16161f;
  --bg-3:          #1c1c28;
  --bg-input:      #13131b;

  --border:        rgba(255,255,255,0.065);
  --border-focus:  rgba(0,230,118,0.35);
  --border-active: rgba(0,230,118,0.18);

  --accent:        #00e676;
  --accent-2:      #00c65a;
  --accent-dim:    rgba(0,230,118,0.10);
  --accent-glow:   rgba(0,230,118,0.04);
  --accent-muted:  rgba(0,230,118,0.55);

  --text-0:        #eeeef4;
  --text-1:        #b0b0c8;
  --text-2:        #7070888;
  --text-muted:    #505068;
  --text-code:     #a8d8b0;

  --danger:        #ff4757;
  --warn:          #ffa502;
  --info:          #4f8ef7;

  --font-ui:       'Syne', system-ui, sans-serif;
  --font-body:     'DM Mono', 'Consolas', monospace;

  --r-sm:  6px;
  --r-md:  10px;
  --r-lg:  16px;
  --r-xl:  22px;
  --r-pill:999px;

  --header-h: 54px;
  --t-fast:   100ms ease;
  --t-med:    200ms ease;
}

/* ── Base ───────────────────────────────────────────────────── */
body{
  font-family:var(--font-body);
  background:var(--bg-0);
  color:var(--text-0);
  height:100dvh;
  height:100vh;
  overflow:hidden;
  line-height:1.65;
  -webkit-font-smoothing:antialiased;
}

/* ── Shell ──────────────────────────────────────────────────── */
.kiai-shell{
  display:flex;
  flex-direction:column;
  height:100dvh;
  height:100vh;
  max-width:820px;
  margin:0 auto;
  position:relative;
}

/* ── Header ─────────────────────────────────────────────────── */
.kiai-header{
  flex-shrink:0;
  height:var(--header-h);
  background:var(--bg-0);
  border-bottom:1px solid var(--border);
  position:relative;
  z-index:20;
}
.kiai-header-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  height:100%;
  padding:0 16px;
}

/* Brand */
.kiai-brand{display:flex;align-items:center;gap:10px}
.kiai-orb{position:relative;width:30px;height:30px;flex-shrink:0}
.kiai-orb-ring{
  position:absolute;inset:0;border-radius:50%;
  border:1px solid rgba(0,230,118,0.28);
  animation:orb-ring 3.5s ease-in-out infinite;
}
.kiai-orb-core{
  position:absolute;inset:8px;border-radius:50%;
  background:radial-gradient(circle at 38% 32%,#00e676 0%,#008040 55%,#003820 100%);
  box-shadow:0 0 10px rgba(0,230,118,0.35);
  animation:orb-breathe 3.5s ease-in-out infinite;
}
@keyframes orb-ring{0%,100%{transform:scale(1);opacity:.4}50%{transform:scale(1.14);opacity:.8}}
@keyframes orb-breathe{0%,100%{box-shadow:0 0 6px rgba(0,230,118,.25)}50%{box-shadow:0 0 16px rgba(0,230,118,.55)}}

.kiai-brand-text{display:flex;flex-direction:column;line-height:1.05}
.kiai-brand-name{
  font-family:var(--font-ui);font-size:.95rem;font-weight:800;
  letter-spacing:.1em;color:var(--text-0);
}
.kiai-brand-sub{
  font-size:.52rem;letter-spacing:.14em;text-transform:uppercase;
  color:var(--text-muted);font-weight:400;
}

/* Header actions */
.kiai-header-actions{display:flex;align-items:center;gap:8px}
.kiai-clear-btn{
  background:transparent;border:1px solid var(--border);
  border-radius:var(--r-sm);width:28px;height:28px;
  display:flex;align-items:center;justify-content:center;
  color:var(--text-muted);cursor:pointer;
  transition:all var(--t-fast);
}
.kiai-clear-btn:hover{border-color:var(--danger);color:var(--danger);background:rgba(255,71,87,.06)}

/* Status */
.kiai-status{display:flex;align-items:center;gap:6px}
.kiai-status-dot{
  width:6px;height:6px;border-radius:50%;
  background:var(--accent);box-shadow:0 0 5px var(--accent);
  transition:all var(--t-med);
}
.kiai-status-dot.thinking{background:var(--warn);box-shadow:0 0 5px var(--warn);animation:dot-blink .7s ease-in-out infinite}
.kiai-status-dot.error{background:var(--danger);box-shadow:0 0 5px var(--danger)}
@keyframes dot-blink{0%,100%{opacity:1}50%{opacity:.25}}
.kiai-status-label{font-size:.58rem;letter-spacing:.1em;text-transform:uppercase;color:var(--text-muted)}

/* ── Main ───────────────────────────────────────────────────── */
.kiai-main{
  flex:1;overflow-y:auto;overflow-x:hidden;
  scroll-behavior:smooth;-webkit-overflow-scrolling:touch;
}
.kiai-main::-webkit-scrollbar{width:2px}
.kiai-main::-webkit-scrollbar-thumb{background:var(--border);border-radius:2px}

/* ── Welcome ────────────────────────────────────────────────── */
.kiai-welcome{
  display:flex;flex-direction:column;align-items:center;justify-content:center;
  min-height:100%;padding:32px 20px 20px;text-align:center;gap:14px;
  animation:fade-up .4s ease both;
}
.kiai-welcome.hidden{display:none}
@keyframes fade-up{from{opacity:0;transform:translateY(14px)}to{opacity:1;transform:translateY(0)}}

.kiai-welcome-icon{color:var(--accent);opacity:.7;animation:icon-rotate 12s linear infinite}
@keyframes icon-rotate{from{transform:rotate(0deg)}to{transform:rotate(360deg)}}

.kiai-welcome-heading{display:flex;flex-direction:column;align-items:center;gap:5px}
.kiai-welcome-title{
  font-family:var(--font-ui);font-size:1.55rem;font-weight:800;
  color:var(--text-0);letter-spacing:-.02em;line-height:1.1;
}
.kiai-welcome-tagline{
  font-family:var(--font-ui);font-size:.82rem;
  color:var(--accent-muted);letter-spacing:.02em;font-weight:400;
}
.kiai-welcome-sub{
  font-size:.72rem;color:var(--text-1);letter-spacing:.01em;
  line-height:1.5;
}

/* Suggestions */
.kiai-suggestions{
  display:flex;flex-wrap:wrap;gap:7px;justify-content:center;
  margin-top:8px;max-width:440px;
}
.kiai-suggestion{
  background:var(--bg-2);border:1px solid var(--border);
  border-radius:var(--r-pill);padding:7px 13px;
  font-family:var(--font-body);font-size:.68rem;
  color:var(--text-1);cursor:pointer;
  transition:all var(--t-fast);line-height:1.35;text-align:left;
}
.kiai-suggestion:hover,.kiai-suggestion:focus{
  border-color:var(--border-active);color:var(--text-0);
  background:var(--accent-dim);outline:none;
}
.kiai-suggestion:active{transform:scale(.97)}

/* ── Messages ───────────────────────────────────────────────── */
.kiai-messages{padding:12px 10px 4px;display:flex;flex-direction:column;gap:0}

/* Message row */
.kiai-msg{
  display:flex;gap:10px;padding:13px 6px;
  border-bottom:1px solid var(--border);
  animation:msg-in .2s ease both;
}
.kiai-msg:last-child{border-bottom:none}
@keyframes msg-in{from{opacity:0;transform:translateY(6px)}to{opacity:1;transform:translateY(0)}}

/* Avatar */
.kiai-msg-avatar{
  flex-shrink:0;width:26px;height:26px;border-radius:var(--r-sm);
  display:flex;align-items:center;justify-content:center;
  font-size:.58rem;font-weight:700;font-family:var(--font-ui);
  letter-spacing:.04em;margin-top:1px;
}
.kiai-msg.user .kiai-msg-avatar{background:var(--bg-3);color:var(--text-1);border:1px solid var(--border)}
.kiai-msg.assistant .kiai-msg-avatar{background:var(--accent-dim);color:var(--accent);border:1px solid var(--border-active)}

/* Message body */
.kiai-msg-body{flex:1;min-width:0}
.kiai-msg-role{
  font-size:.58rem;font-weight:600;letter-spacing:.1em;
  text-transform:uppercase;margin-bottom:4px;font-family:var(--font-ui);
}
.kiai-msg.user .kiai-msg-role{color:var(--text-muted)}
.kiai-msg.assistant .kiai-msg-role{color:var(--accent);opacity:.65}

.kiai-msg-text{
  font-size:.84rem;line-height:1.68;color:var(--text-0);
  word-break:break-word;white-space:pre-wrap;
}
.kiai-msg.user .kiai-msg-text{color:var(--text-1)}
.kiai-msg-text strong,.kiai-msg-text b{color:var(--text-0);font-weight:500}

/* Inline formatting helpers (applied by JS) */
.kiai-bullet{display:block;padding-left:1.1em;position:relative;margin:2px 0}
.kiai-bullet::before{content:'•';position:absolute;left:0;color:var(--accent);opacity:.5}
.kiai-section-title{
  display:block;color:var(--text-0);font-weight:500;
  margin-top:9px;margin-bottom:3px;
  font-family:var(--font-ui);font-size:.78rem;letter-spacing:.02em;
}
.kiai-warning{
  display:block;margin-top:9px;padding:7px 11px;
  background:rgba(255,71,87,.07);border-left:2px solid var(--danger);
  border-radius:0 var(--r-sm) var(--r-sm) 0;font-size:.78rem;color:#ff6b78;
}
.kiai-code-block{
  display:block;margin:8px 0;padding:10px 12px;
  background:var(--bg-3);border:1px solid var(--border);
  border-radius:var(--r-md);font-size:.76rem;
  color:var(--text-code);overflow-x:auto;white-space:pre;
  line-height:1.55;
}

/* Thinking dots */
.kiai-msg.thinking .kiai-msg-text{display:flex;align-items:center;gap:5px;color:var(--text-muted);font-size:.76rem}
.kiai-thinking-dots{display:flex;gap:4px}
.kiai-thinking-dots span{
  width:4px;height:4px;background:var(--text-muted);border-radius:50%;
  animation:thinking .9s ease-in-out infinite;
}
.kiai-thinking-dots span:nth-child(2){animation-delay:.18s}
.kiai-thinking-dots span:nth-child(3){animation-delay:.36s}
@keyframes thinking{0%,60%,100%{transform:translateY(0);opacity:.4}30%{transform:translateY(-4px);opacity:1}}

/* Meta tags */
.kiai-msg-meta{display:flex;align-items:center;gap:5px;margin-top:7px;flex-wrap:wrap}
.kiai-tag{
  font-size:.55rem;letter-spacing:.08em;text-transform:uppercase;
  padding:2px 7px;border-radius:var(--r-pill);font-family:var(--font-ui);
}
.kiai-tag.intent{background:rgba(0,230,118,.07);color:var(--accent-muted);border:1px solid rgba(0,230,118,.12)}
.kiai-tag.source{background:var(--bg-3);color:var(--text-muted);border:1px solid var(--border)}
.kiai-tag.source.ai{background:rgba(79,142,247,.07);color:#7eaaff;border-color:rgba(79,142,247,.15)}

/* ── Footer / Input ─────────────────────────────────────────── */
.kiai-footer{
  flex-shrink:0;border-top:1px solid var(--border);
  background:var(--bg-0);padding:10px 12px;
  padding-bottom:max(8px,env(safe-area-inset-bottom));
}
.kiai-input-wrap{display:flex;flex-direction:column;gap:5px}
.kiai-input-box{
  display:flex;align-items:flex-end;gap:8px;
  background:var(--bg-input);border:1px solid var(--border);
  border-radius:var(--r-lg);padding:9px 9px 9px 13px;
  transition:border-color var(--t-fast),box-shadow var(--t-fast);
}
.kiai-input-box:focus-within{
  border-color:var(--border-focus);
  box-shadow:0 0 0 3px var(--accent-glow);
}
.kiai-textarea{
  flex:1;background:transparent;border:none;outline:none;resize:none;
  font-family:var(--font-body);font-size:.84rem;color:var(--text-0);
  line-height:1.55;max-height:120px;min-height:20px;
  overflow-y:auto;caret-color:var(--accent);
}
.kiai-textarea::placeholder{color:var(--text-muted)}
.kiai-textarea::-webkit-scrollbar{width:2px}
.kiai-textarea::-webkit-scrollbar-thumb{background:var(--border)}

.kiai-send-btn{
  flex-shrink:0;width:34px;height:34px;border-radius:var(--r-md);
  border:none;background:var(--accent);color:#080f0c;
  cursor:pointer;display:flex;align-items:center;justify-content:center;
  transition:all var(--t-fast);
}
.kiai-send-btn:disabled{background:var(--bg-3);color:var(--text-muted);cursor:default}
.kiai-send-btn:not(:disabled):hover{background:#2effa0;transform:scale(1.05)}
.kiai-send-btn:not(:disabled):active{transform:scale(.94)}
.kiai-send-btn.loading{background:rgba(255,165,2,.12);color:var(--warn);cursor:not-allowed}

.kiai-disclaimer{font-size:.56rem;color:var(--text-muted);text-align:center;letter-spacing:.02em}

/* ── Utility ────────────────────────────────────────────────── */
.hidden{display:none!important}

/* ── Desktop ────────────────────────────────────────────────── */
@media(min-width:600px){
  .kiai-header-inner{padding:0 22px}
  .kiai-messages{padding:16px 18px 6px}
  .kiai-footer{padding:12px 22px;padding-bottom:max(10px,env(safe-area-inset-bottom))}
  .kiai-msg{padding:15px 6px}
  .kiai-welcome-title{font-size:1.9rem}
  .kiai-msg-text{font-size:.86rem}
}
@media(min-width:820px){
  .kiai-shell{border-left:1px solid var(--border);border-right:1px solid var(--border)}
}