*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg:        #050d1a;
  --surface:   #0b1628;
  --surface2:  #112040;
  --border:    rgba(56,180,255,0.12);
  --accent:    #38b4ff;
  --accent2:   #00e5c3;
  --accent3:   #ff6b6b;
  --text:      #e8f4ff;
  --muted:     #6b8cad;
  --pill:      rgba(56,180,255,0.10);
  --user-bg:   linear-gradient(135deg,#0d2a4a,#0a1e38);
  --bot-bg:    #0b1f38;
  --glow:      0 0 40px rgba(56,180,255,0.18);
  --radius:    18px;
}

html, body {
  height: 100%;
  background: var(--bg);
  color: var(--text);
  font-family: 'Sora', sans-serif;
  overflow: hidden;
}

/* ── Background ── */
.bg-layer {
  position: fixed; inset: 0; z-index: 0; pointer-events: none;
  background:
    radial-gradient(ellipse 80% 60% at 20% 10%, rgba(56,180,255,0.07) 0%, transparent 60%),
    radial-gradient(ellipse 60% 50% at 80% 90%, rgba(0,229,195,0.05) 0%, transparent 55%),
    radial-gradient(ellipse 40% 40% at 50% 50%, rgba(5,13,26,0.9) 0%, transparent 100%);
}
.grid-overlay {
  position: fixed; inset: 0; z-index: 0; pointer-events: none; opacity: 0.03;
  background-image:
    linear-gradient(var(--accent) 1px, transparent 1px),
    linear-gradient(90deg, var(--accent) 1px, transparent 1px);
  background-size: 44px 44px;
}

/* ── App Shell ── */
.app {
  position: relative; z-index: 1;
  display: grid; grid-template-rows: auto 1fr auto;
  height: 100vh; max-width: 900px; margin: 0 auto;
  padding: 0 16px;
}

/* ── Header ── */
header {
  padding: 20px 0 14px;
  display: flex; align-items: center; gap: 16px;
  border-bottom: 1px solid var(--border);
}
.logo-ring {
  width: 46px; height: 46px; border-radius: 50%;
  border: 2px solid var(--accent);
  display: flex; align-items: center; justify-content: center;
  background: radial-gradient(circle at 40% 40%, #0d2a4a, #050d1a);
  box-shadow: 0 0 20px rgba(56,180,255,0.3);
  flex-shrink: 0; position: relative;
}
.pulse-ring {
  position: absolute; inset: -6px; border-radius: 50%;
  border: 1px solid rgba(56,180,255,0.25);
  animation: pulse-expand 2.4s ease-out infinite;
}
@keyframes pulse-expand {
  0%   { transform: scale(1); opacity: 0.6; }
  100% { transform: scale(1.55); opacity: 0; }
}
.logo-ring svg { width: 22px; height: 22px; }

.header-text h1 {
  font-family: 'DM Serif Display', serif; font-size: 1.45rem; letter-spacing: 0.01em;
  background: linear-gradient(100deg, #fff 30%, var(--accent));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
}
.header-text p { font-size: 0.72rem; color: var(--muted); margin-top: 1px; letter-spacing: 0.04em; }

.status-badge {
  margin-left: auto; display: flex; align-items: center; gap: 7px;
  font-size: 0.7rem; color: var(--accent2); letter-spacing: 0.06em;
  background: rgba(0,229,195,0.07); border: 1px solid rgba(0,229,195,0.2);
  padding: 5px 12px; border-radius: 99px;
}
.dot { width: 6px; height: 6px; border-radius: 50%; background: var(--accent2); animation: blink 1.6s ease-in-out infinite; }
@keyframes blink { 0%,100% { opacity:1; } 50% { opacity:0.2; } }

/* ── Messages ── */
.messages {
  overflow-y: auto; padding: 20px 0; display: flex; flex-direction: column; gap: 16px;
  scrollbar-width: thin; scrollbar-color: var(--surface2) transparent;
}
.messages::-webkit-scrollbar { width: 4px; }
.messages::-webkit-scrollbar-thumb { background: var(--surface2); border-radius: 4px; }

.msg { display: flex; gap: 12px; animation: slide-up 0.35s cubic-bezier(.22,.68,0,1.2) both; }
@keyframes slide-up { from { opacity:0; transform: translateY(14px); } to { opacity:1; transform: translateY(0); } }

.msg.user { flex-direction: row-reverse; }

.avatar {
  width: 34px; height: 34px; border-radius: 50%; flex-shrink: 0;
  display: flex; align-items: center; justify-content: center; font-size: 0.85rem;
}
.avatar.bot  { background: linear-gradient(135deg,#0d2a4a,#1a4080); border: 1px solid var(--accent); }
.avatar.user { background: linear-gradient(135deg,#0a2a1a,#0d3d28); border: 1px solid var(--accent2); font-size: 0.75rem; color: var(--accent2); font-weight: 600; }

.bubble {
  max-width: 78%; padding: 13px 17px; border-radius: var(--radius);
  line-height: 1.65; font-size: 0.88rem;
}
.msg.bot  .bubble { background: var(--bot-bg); border: 1px solid var(--border); border-top-left-radius: 4px; }
.msg.user .bubble { background: var(--user-bg); border: 1px solid rgba(0,229,195,0.15); border-top-right-radius: 4px; color: #cce8ff; }

.bubble strong { color: var(--accent); font-weight: 600; }
.bubble em     { color: var(--accent2); font-style: normal; font-weight: 500; }
.bubble .disclaimer {
  margin-top: 10px; font-size: 0.75rem; color: var(--muted);
  padding: 6px 10px; background: rgba(255,107,107,0.07);
  border-left: 2px solid var(--accent3); border-radius: 0 6px 6px 0;
}

/* ── Typing indicator ── */
.typing-bubble { display: flex; align-items: center; gap: 5px; padding: 14px 18px; }
.typing-bubble span {
  width: 7px; height: 7px; border-radius: 50%; background: var(--accent);
  display: block; animation: bounce 1.2s ease-in-out infinite;
}
.typing-bubble span:nth-child(2) { animation-delay: .18s; background: var(--accent2); }
.typing-bubble span:nth-child(3) { animation-delay: .36s; }
@keyframes bounce { 0%,60%,100% { transform:translateY(0); } 30% { transform:translateY(-7px); } }

/* ── Quick Chips ── */
.chips-wrap { display: flex; flex-wrap: wrap; gap: 8px; padding-bottom: 4px; }
.chip {
  font-size: 0.75rem; padding: 6px 13px; border-radius: 99px; cursor: pointer;
  background: var(--pill); border: 1px solid var(--border);
  color: #9ac8e8; transition: all .2s; font-family: 'Sora', sans-serif;
  white-space: nowrap;
}
.chip:hover { background: rgba(56,180,255,0.18); border-color: var(--accent); color: #fff; transform: translateY(-1px); }

/* ── Input Area ── */
.input-area {
  padding: 14px 0 20px;
  border-top: 1px solid var(--border);
  display: flex; flex-direction: column; gap: 10px;
}
.input-row { display: flex; gap: 10px; align-items: flex-end; }
.input-box {
  flex: 1; display: flex; align-items: center; gap: 8px;
  background: var(--surface); border: 1px solid var(--border);
  border-radius: 14px; padding: 11px 14px;
  transition: border-color .25s, box-shadow .25s;
}
.input-box:focus-within { border-color: var(--accent); box-shadow: var(--glow); }
.input-box textarea {
  flex: 1; background: transparent; border: none; outline: none; resize: none;
  color: var(--text); font-family: 'Sora', sans-serif; font-size: 0.88rem; line-height: 1.5;
  max-height: 120px; min-height: 24px;
}
.input-box textarea::placeholder { color: var(--muted); }

.mic-btn {
  background: none; border: none; cursor: pointer; padding: 2px;
  color: var(--muted); transition: color .2s;
  display: flex; align-items: center;
}
.mic-btn:hover { color: var(--accent2); }
.mic-btn.active { color: var(--accent3); animation: mic-pulse 1s ease-in-out infinite; }
@keyframes mic-pulse { 0%,100% { transform: scale(1); } 50% { transform: scale(1.2); } }

.send-btn {
  width: 46px; height: 46px; border-radius: 13px; border: none; cursor: pointer;
  background: linear-gradient(135deg, var(--accent), #1a7abf);
  display: flex; align-items: center; justify-content: center;
  box-shadow: 0 4px 18px rgba(56,180,255,0.3);
  transition: transform .18s, box-shadow .18s;
  flex-shrink: 0;
}
.send-btn:hover  { transform: translateY(-2px); box-shadow: 0 8px 24px rgba(56,180,255,0.45); }
.send-btn:active { transform: scale(0.95); }
.send-btn svg { width: 19px; height: 19px; }

/* ── Welcome ── */
.welcome {
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  height: 100%; text-align: center; gap: 12px; padding: 20px 0;
  animation: fade-in 0.6s ease both;
}
@keyframes fade-in { from { opacity:0; transform:translateY(8px); } to { opacity:1; transform:translateY(0); } }

.welcome-icon {
  width: 72px; height: 72px; border-radius: 50%;
  background: radial-gradient(circle at 35% 35%, #0d2a4a, #050d1a);
  border: 2px solid rgba(56,180,255,0.4);
  display: flex; align-items: center; justify-content: center;
  box-shadow: 0 0 40px rgba(56,180,255,0.15);
  margin-bottom: 4px;
}
.welcome-title {
  font-family: 'DM Serif Display', serif; font-size: 1.6rem;
  background: linear-gradient(120deg, #fff 40%, var(--accent));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
}
.welcome-sub { font-size: 0.88rem; color: var(--muted); line-height: 1.6; max-width: 360px; }
.welcome-sub strong { color: var(--accent2); font-weight: 500; }

.welcome-tags { display: flex; gap: 8px; flex-wrap: wrap; justify-content: center; margin-top: 4px; }
.tag {
  font-size: 0.7rem; padding: 4px 12px; border-radius: 99px;
  background: rgba(56,180,255,0.07); border: 1px solid var(--border);
  color: var(--muted); letter-spacing: 0.03em;
}