:root {
  --bg-0: #06061a;
  --bg-1: #0e0e2a;
  --bg-2: #181838;
  --surface: rgba(24, 24, 56, 0.7);
  --surface-2: rgba(40, 40, 80, 0.55);
  --border: rgba(150, 130, 255, 0.18);
  --border-strong: rgba(150, 130, 255, 0.4);
  --text: #e6e6f4;
  --text-dim: #9c9cc8;
  --accent: #a78bfa;
  --accent-2: #60a5fa;
  --accent-glow: rgba(167, 139, 250, 0.35);
  --ok: #34d399;
  --warn: #fbbf24;
  --err: #f87171;
  --tool-time: #60a5fa;
  --tool-calc: #fbbf24;
  --tool-service: #34d399;
  --tool-cup: #f472b6;
  --tool-list: #a78bfa;
}

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

html, body {
  height: 100%;
  background: var(--bg-0);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Inter", system-ui, sans-serif;
  font-size: 15px;
  line-height: 1.55;
  overflow: hidden;
}

body {
  display: flex;
  flex-direction: column;
  background:
    radial-gradient(ellipse at top, rgba(120, 80, 255, 0.15) 0%, transparent 50%),
    radial-gradient(ellipse at bottom, rgba(80, 100, 255, 0.1) 0%, transparent 60%),
    linear-gradient(180deg, var(--bg-0) 0%, var(--bg-1) 100%);
}

.stars {
  position: fixed; inset: 0; z-index: 0; pointer-events: none;
  background-image:
    radial-gradient(1px 1px at 13% 22%, rgba(255,255,255,0.6), transparent),
    radial-gradient(1px 1px at 47% 8%, rgba(255,255,255,0.5), transparent),
    radial-gradient(1px 1px at 78% 35%, rgba(255,255,255,0.7), transparent),
    radial-gradient(1px 1px at 28% 62%, rgba(255,255,255,0.4), transparent),
    radial-gradient(1px 1px at 67% 78%, rgba(255,255,255,0.55), transparent),
    radial-gradient(1px 1px at 91% 14%, rgba(255,255,255,0.5), transparent),
    radial-gradient(2px 2px at 35% 88%, rgba(180,160,255,0.6), transparent);
  background-size: 100% 100%;
  animation: twinkle 8s ease-in-out infinite alternate;
}
@keyframes twinkle { from { opacity: 0.5; } to { opacity: 0.9; } }

/* ─── Topbar ─────────────────────────────────────────────────────────────── */
.topbar {
  position: relative; z-index: 2;
  display: flex; justify-content: space-between; align-items: center;
  padding: 14px 24px;
  background: rgba(8, 8, 28, 0.6);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
}
.brand { display: flex; align-items: center; gap: 14px; }
.brand-icon {
  width: 42px; height: 42px;
  display: grid; place-items: center;
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-2) 100%);
  border-radius: 12px;
  color: #fff;
  font-size: 20px;
  box-shadow: 0 4px 24px var(--accent-glow);
  animation: pulse-glow 3s ease-in-out infinite;
}
@keyframes pulse-glow {
  0%, 100% { box-shadow: 0 4px 24px var(--accent-glow); }
  50% { box-shadow: 0 4px 36px rgba(167, 139, 250, 0.6); }
}
.brand h1 {
  font-size: 17px; font-weight: 600; letter-spacing: -0.01em;
  background: linear-gradient(90deg, #fff 0%, #c4b5fd 100%);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent;
}
.brand p { font-size: 12px; color: var(--text-dim); margin-top: 1px; }
.topbar-right { display: flex; align-items: center; gap: 8px; font-size: 13px; color: var(--text-dim); }
.status-dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--ok);
  box-shadow: 0 0 8px var(--ok);
  animation: pulse 2s ease-in-out infinite;
}
.status-dot.busy { background: var(--warn); box-shadow: 0 0 8px var(--warn); }
.status-dot.err { background: var(--err); box-shadow: 0 0 8px var(--err); animation: none; }
@keyframes pulse { 0%, 100% { opacity: 1; } 50% { opacity: 0.5; } }

/* ─── Chat ───────────────────────────────────────────────────────────────── */
.chat-shell {
  position: relative; z-index: 1;
  flex: 1; display: flex; flex-direction: column;
  max-width: 900px; width: 100%;
  margin: 0 auto;
  padding: 24px 24px 0;
  overflow: hidden;
}
.chat-stream {
  flex: 1; overflow-y: auto; padding-right: 8px;
  display: flex; flex-direction: column; gap: 14px;
  scroll-behavior: smooth;
}
.chat-stream::-webkit-scrollbar { width: 8px; }
.chat-stream::-webkit-scrollbar-thumb { background: var(--border); border-radius: 4px; }

.welcome {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 20px 22px;
  backdrop-filter: blur(10px);
}
.welcome i { color: var(--accent); margin-right: 8px; }
.welcome p { margin-bottom: 12px; }
.suggestions { list-style: none; display: flex; flex-wrap: wrap; gap: 8px; }
.suggestions li {
  background: var(--surface-2);
  border: 1px solid var(--border);
  padding: 7px 13px; border-radius: 20px;
  font-size: 13px; cursor: pointer;
  transition: all 0.18s ease;
  user-select: none;
}
.suggestions li:hover {
  background: rgba(167, 139, 250, 0.15);
  border-color: var(--border-strong);
  transform: translateY(-1px);
}

.msg {
  display: flex; gap: 12px;
  animation: slide-in 0.3s ease-out;
}
@keyframes slide-in {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}
.msg.user { justify-content: flex-end; }
.msg .bubble {
  max-width: 78%;
  padding: 12px 16px;
  border-radius: 16px;
  font-size: 14.5px;
  line-height: 1.55;
  white-space: pre-wrap;
  word-wrap: break-word;
}
.msg.user .bubble {
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-2) 100%);
  color: #fff;
  border-bottom-right-radius: 4px;
  box-shadow: 0 2px 12px var(--accent-glow);
}
.msg.assistant { flex-direction: column; gap: 8px; }
.msg.assistant .bubble {
  background: var(--surface);
  border: 1px solid var(--border);
  border-bottom-left-radius: 4px;
  backdrop-filter: blur(10px);
}
.msg.assistant .bubble .cursor {
  display: inline-block; width: 7px; height: 16px;
  background: var(--accent); margin-left: 2px;
  animation: blink 1s steps(2) infinite;
  vertical-align: text-bottom;
}
@keyframes blink { 50% { opacity: 0; } }

/* ─── Tool cards ─────────────────────────────────────────────────────────── */
.tool-card {
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  border-radius: 12px;
  padding: 12px 14px;
  font-size: 13.5px;
  max-width: 78%;
  animation: tool-pop 0.35s cubic-bezier(0.34, 1.56, 0.64, 1);
}
@keyframes tool-pop {
  from { opacity: 0; transform: scale(0.92) translateY(6px); }
  to { opacity: 1; transform: scale(1) translateY(0); }
}
.tool-card.tool-get_time { border-left-color: var(--tool-time); }
.tool-card.tool-calculate { border-left-color: var(--tool-calc); }
.tool-card.tool-check_service { border-left-color: var(--tool-service); }
.tool-card.tool-pillar_cup_status { border-left-color: var(--tool-cup); }
.tool-card.tool-list_running_services { border-left-color: var(--tool-list); }

.tool-header {
  display: flex; align-items: center; gap: 10px;
  margin-bottom: 8px;
  font-weight: 600;
}
.tool-header .tool-icon {
  width: 28px; height: 28px;
  display: grid; place-items: center;
  background: rgba(167, 139, 250, 0.15);
  border-radius: 8px;
  font-size: 13px;
  color: var(--accent);
}
.tool-card.tool-get_time .tool-icon { background: rgba(96,165,250,0.18); color: var(--tool-time); }
.tool-card.tool-calculate .tool-icon { background: rgba(251,191,36,0.18); color: var(--tool-calc); }
.tool-card.tool-check_service .tool-icon { background: rgba(52,211,153,0.18); color: var(--tool-service); }
.tool-card.tool-pillar_cup_status .tool-icon { background: rgba(244,114,182,0.18); color: var(--tool-cup); }
.tool-card.tool-list_running_services .tool-icon { background: rgba(167,139,250,0.18); color: var(--tool-list); }

.tool-header .tool-name { font-size: 13.5px; }
.tool-header .tool-status {
  margin-left: auto; font-size: 11.5px; font-weight: 500;
  color: var(--text-dim);
  display: flex; align-items: center; gap: 5px;
}
.tool-header .tool-status .spinner {
  width: 11px; height: 11px;
  border: 2px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }
.tool-header .tool-status.done { color: var(--ok); }
.tool-header .tool-status.err { color: var(--err); }

.tool-input, .tool-result {
  background: rgba(0,0,0,0.3);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 9px 11px;
  margin-top: 8px;
  font-family: "SF Mono", "Monaco", "Menlo", "Consolas", monospace;
  font-size: 12px;
  color: var(--text-dim);
  overflow-x: auto;
  white-space: pre-wrap;
  max-height: 220px;
  overflow-y: auto;
}
.tool-input::before { content: "input"; display: block; color: var(--accent); font-size: 10px; text-transform: uppercase; letter-spacing: 0.08em; margin-bottom: 4px; font-family: inherit; }
.tool-result::before { content: "result"; display: block; color: var(--ok); font-size: 10px; text-transform: uppercase; letter-spacing: 0.08em; margin-bottom: 4px; }
.tool-result.err::before { content: "error"; color: var(--err); }

/* ─── Composer ───────────────────────────────────────────────────────────── */
.composer {
  flex-shrink: 0;
  padding: 16px 0 18px;
  position: sticky; bottom: 0;
  background: linear-gradient(180deg, transparent 0%, var(--bg-0) 50%);
}
.composer-inner {
  display: flex; align-items: flex-end; gap: 10px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 10px 12px;
  backdrop-filter: blur(14px);
  transition: border-color 0.2s ease;
}
.composer-inner:focus-within {
  border-color: var(--border-strong);
  box-shadow: 0 0 0 3px var(--accent-glow);
}
#input {
  flex: 1; background: transparent; border: none; outline: none;
  resize: none; font-family: inherit; font-size: 15px; color: var(--text);
  padding: 6px 4px; max-height: 160px;
}
#input::placeholder { color: var(--text-dim); }
#send-btn {
  width: 38px; height: 38px;
  display: grid; place-items: center;
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-2) 100%);
  border: none; border-radius: 12px;
  color: #fff; cursor: pointer;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}
#send-btn:hover { transform: scale(1.05); box-shadow: 0 4px 18px var(--accent-glow); }
#send-btn:active { transform: scale(0.96); }
#send-btn:disabled { opacity: 0.5; cursor: not-allowed; transform: none; }

.composer-hint {
  display: flex; justify-content: space-between;
  margin-top: 8px; padding: 0 4px;
  font-size: 11.5px; color: var(--text-dim);
}
.composer-hint i { margin-right: 4px; }

@media (max-width: 640px) {
  .topbar { padding: 12px 16px; }
  .brand h1 { font-size: 15px; }
  .brand p { display: none; }
  .chat-shell { padding: 16px 12px 0; }
  .msg .bubble, .tool-card { max-width: 90%; }
}