:root {
  --bg: #07111f;
  --bg-soft: rgba(13, 25, 44, 0.76);
  --card: rgba(11, 18, 34, 0.82);
  --border: rgba(141, 173, 255, 0.18);
  --text: #eaf1ff;
  --muted: #9db1d6;
  --accent: #66d1ff;
  --accent-2: #8d6bff;
  --success: #59f3b0;
  --danger: #ff7f96;
  --shadow: 0 24px 60px rgba(0, 0, 0, 0.36);
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  min-height: 100vh;
  font-family: Inter, system-ui, sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(102, 209, 255, 0.14), transparent 28%),
    radial-gradient(circle at top right, rgba(141, 107, 255, 0.14), transparent 24%),
    linear-gradient(180deg, #08111c 0%, #050a12 100%);
}

.bg-grid {
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
  background-size: 34px 34px;
  mask-image: linear-gradient(180deg, rgba(255,255,255,0.7), rgba(255,255,255,0.15));
  pointer-events: none;
}

.shell {
  position: relative;
  z-index: 1;
  width: min(1300px, calc(100vw - 32px));
  margin: 28px auto;
}

.hero-card {
  padding: 28px;
  border: 1px solid var(--border);
  border-radius: 28px;
  background: linear-gradient(180deg, rgba(8, 14, 26, 0.9), rgba(8, 14, 26, 0.68));
  box-shadow: var(--shadow);
  backdrop-filter: blur(18px);
}

.hero-top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 24px;
}

.eyebrow {
  margin: 0 0 10px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.28em;
  color: var(--accent);
}

h1 {
  margin: 0;
  font-size: clamp(32px, 5vw, 56px);
  line-height: 1.02;
}

.hero-copy {
  max-width: 760px;
  margin: 14px 0 0;
  color: var(--muted);
  font-size: 16px;
  line-height: 1.7;
}

.hero-pill {
  padding: 12px 16px;
  border-radius: 999px;
  border: 1px solid rgba(102, 209, 255, 0.25);
  background: rgba(102, 209, 255, 0.08);
  color: #dff7ff;
  white-space: nowrap;
}

.panel-grid {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 24px;
}

.panel {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 24px;
  padding: 24px;
}

.panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 20px;
}

.panel-header h2 {
  margin: 0;
  font-size: 22px;
}

.status-chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 14px;
  border-radius: 999px;
  background: rgba(89, 243, 176, 0.12);
  color: #cffff1;
  border: 1px solid rgba(89, 243, 176, 0.18);
  font-size: 13px;
  font-weight: 700;
}

.status-chip.muted {
  background: rgba(141, 177, 214, 0.12);
  color: #dde9ff;
  border-color: rgba(141, 177, 214, 0.16);
}

.form-stack {
  display: grid;
  gap: 18px;
}

.field-grid,
.advanced-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.field {
  display: grid;
  gap: 8px;
}

.field-full {
  grid-column: 1 / -1;
}

.field span,
.response-label {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--muted);
  font-weight: 700;
}

input,
textarea {
  width: 100%;
  border: 1px solid rgba(141, 173, 255, 0.16);
  background: rgba(9, 15, 28, 0.88);
  color: var(--text);
  border-radius: 16px;
  padding: 14px 16px;
  font: inherit;
  outline: none;
  transition: border-color .2s ease, box-shadow .2s ease, transform .2s ease;
}

input:focus,
textarea:focus {
  border-color: rgba(102, 209, 255, 0.5);
  box-shadow: 0 0 0 4px rgba(102, 209, 255, 0.08);
}

textarea { resize: vertical; min-height: 120px; }

.audio-box,
.advanced-card,
.response-card,
.meta-box {
  border: 1px solid rgba(141, 173, 255, 0.12);
  border-radius: 20px;
  background: rgba(10, 15, 28, 0.62);
}

.audio-box,
.response-card {
  padding: 16px;
}

.audio-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
}

.audio-hint,
.reply-audio-placeholder {
  color: var(--muted);
  font-size: 14px;
}

.advanced-card {
  padding: 0 16px 16px;
}

.advanced-card summary {
  list-style: none;
  cursor: pointer;
  padding: 16px 0;
  font-weight: 700;
}

.advanced-card summary::-webkit-details-marker {
  display: none;
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.btn {
  border: 0;
  border-radius: 16px;
  padding: 14px 18px;
  font: inherit;
  font-weight: 700;
  cursor: pointer;
  transition: transform .2s ease, opacity .2s ease, box-shadow .2s ease;
}

.btn:hover { transform: translateY(-1px); }
.btn:disabled { opacity: .55; cursor: not-allowed; }

.btn-primary {
  background: linear-gradient(135deg, var(--accent), #6ef1ff);
  color: #04111e;
  box-shadow: 0 14px 26px rgba(102, 209, 255, 0.18);
}

.btn-secondary {
  background: linear-gradient(135deg, rgba(141, 107, 255, 0.92), rgba(102, 209, 255, 0.88));
  color: white;
}

.btn-ghost {
  background: rgba(255, 255, 255, 0.04);
  color: var(--text);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.response-meta {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin-bottom: 16px;
}

.meta-box {
  padding: 16px;
  display: grid;
  gap: 8px;
}

.meta-box strong {
  font-size: 12px;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--muted);
}

.reply-text {
  min-height: 86px;
  white-space: pre-wrap;
  line-height: 1.7;
  color: var(--text);
}

.code-card pre {
  margin: 0;
  white-space: pre-wrap;
  word-break: break-word;
  color: #dce8ff;
  font-size: 13px;
  line-height: 1.6;
}

audio {
  width: 100%;
  margin-top: 8px;
}

@media (max-width: 1024px) {
  .panel-grid { grid-template-columns: 1fr; }
  .hero-top { flex-direction: column; }
}

@media (max-width: 720px) {
  .shell { width: min(100vw - 18px, 100%); margin: 10px auto; }
  .hero-card, .panel { padding: 18px; }
  .field-grid, .advanced-grid, .response-meta { grid-template-columns: 1fr; }
  h1 { font-size: 34px; }
}