:root {
  --ink: #102033;
  --ink-soft: #3a4a5c;
  --paper: #f3efe6;
  --paper-deep: #e7e0d2;
  --accent: #1f6b5a;
  --accent-bright: #2f9a82;
  --accent-deep: #164f43;
  --line: rgba(16, 32, 51, 0.12);
  --glow: rgba(47, 154, 130, 0.28);
}

* { box-sizing: border-box; }
html, body { margin: 0; min-height: 100%; }

body {
  font-family: "Noto Sans HK", "Instrument Sans", sans-serif;
  color: var(--ink);
  background:
    radial-gradient(1200px 700px at 85% -10%, var(--glow), transparent 55%),
    radial-gradient(900px 500px at -10% 100%, rgba(16, 32, 51, 0.08), transparent 50%),
    linear-gradient(160deg, var(--paper) 0%, var(--paper-deep) 100%);
}

.shell {
  width: min(1080px, calc(100% - 2rem));
  margin: 0 auto;
  padding: 2.5rem 0 4rem;
}

.brand {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.65rem 1rem;
  margin-bottom: 2.75rem;
}

.brand strong {
  font-family: "Instrument Sans", "Noto Sans HK", sans-serif;
  font-size: clamp(1.7rem, 4vw, 2.4rem);
  font-weight: 700;
  letter-spacing: -0.03em;
}

.brand span { color: var(--ink-soft); font-size: 0.95rem; }

h1 {
  font-family: "Instrument Sans", "Noto Sans HK", sans-serif;
  font-size: clamp(2rem, 5.5vw, 3.6rem);
  line-height: 1.12;
  letter-spacing: -0.035em;
  max-width: 14ch;
  margin: 0 0 1rem;
}

.lede {
  max-width: 38rem;
  font-size: 1.08rem;
  line-height: 1.65;
  color: var(--ink-soft);
  margin: 0 0 2rem;
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1rem 1.25rem;
  margin-bottom: 2.75rem;
}

.call-btn {
  position: relative;
  appearance: none;
  border: 0;
  cursor: pointer;
  color: #fff;
  background: linear-gradient(145deg, var(--accent-bright), var(--accent-deep));
  font: inherit;
  font-weight: 600;
  font-size: 1.05rem;
  letter-spacing: 0.01em;
  padding: 1rem 1.6rem 1rem 1.35rem;
  min-width: 12.5rem;
  transition: transform 160ms ease, box-shadow 160ms ease, filter 160ms ease;
  box-shadow: 0 10px 28px rgba(31, 107, 90, 0.28);
}

.call-btn:hover { transform: translateY(-1px); filter: brightness(1.05); }
.call-btn:active { transform: translateY(1px); }
.call-btn.is-live {
  background: linear-gradient(145deg, #b42318, #7a1510);
  box-shadow: 0 10px 28px rgba(180, 35, 24, 0.28);
}

.call-btn__pulse {
  display: inline-block;
  width: 0.55rem;
  height: 0.55rem;
  margin-right: 0.65rem;
  border-radius: 50%;
  background: #fff;
  box-shadow: 0 0 0 0 rgba(255, 255, 255, 0.55);
  animation: none;
  vertical-align: middle;
}

.call-btn.is-live .call-btn__pulse {
  animation: pulse 1.6s ease-out infinite;
}

@keyframes pulse {
  0% { box-shadow: 0 0 0 0 rgba(255, 255, 255, 0.55); }
  70% { box-shadow: 0 0 0 12px rgba(255, 255, 255, 0); }
  100% { box-shadow: 0 0 0 0 rgba(255, 255, 255, 0); }
}

.status {
  margin: 0;
  color: var(--ink-soft);
  font-size: 0.95rem;
}

.panel {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 1.25rem;
  margin-bottom: 1.5rem;
}

@media (max-width: 860px) {
  .panel { grid-template-columns: 1fr; }
}

.block, .transcript-panel {
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.55);
  padding: 1.25rem 1.35rem;
}

.block h2, .transcript-panel h2 {
  margin: 0 0 0.85rem;
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
}

.script { margin: 0; font-size: 1.05rem; line-height: 1.7; }
.script em { font-style: normal; color: var(--ink); font-weight: 600; }
.meta { margin-top: 1.5rem; font-size: 0.82rem; color: var(--ink-soft); }
ul { margin: 0; padding-left: 1.1rem; color: var(--ink-soft); line-height: 1.7; }

.transcript {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  max-height: 320px;
  overflow: auto;
}

.bubble {
  max-width: 92%;
  padding: 0.7rem 0.9rem;
  line-height: 1.55;
  font-size: 0.95rem;
}

.bubble.user {
  align-self: flex-end;
  background: rgba(16, 32, 51, 0.08);
}

.bubble.agent {
  align-self: flex-start;
  background: rgba(31, 107, 90, 0.1);
}

.bubble .who {
  display: block;
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.25rem;
}