:root {
  color-scheme: light;
  --ink: #101828;
  --muted: #667085;
  --border: #d0d5dd;
  --surface: #ffffff;
  --surface-alt: #f8fafc;
  --primary: #155eef;
  --primary-dark: #004eeb;
  --primary-soft: #eff4ff;
  --success: #067647;
  --success-soft: #ecfdf3;
  --warning: #b54708;
  --warning-soft: #fffaeb;
  --danger: #b42318;
  --danger-soft: #fef3f2;
  --shadow: 0 18px 45px rgba(16, 24, 40, 0.08);
  font-family: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }
body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  background:
    radial-gradient(circle at top left, rgba(21, 94, 239, 0.08), transparent 32rem),
    #f4f7fb;
}
button, input, select { font: inherit; }
button { cursor: pointer; }
button:disabled { cursor: not-allowed; opacity: 0.48; }

.page-shell { width: min(1120px, calc(100% - 32px)); margin: 0 auto; padding: 40px 0 28px; }
.site-header { display: flex; justify-content: space-between; gap: 24px; align-items: flex-start; margin-bottom: 28px; }
.eyebrow { margin: 0 0 8px; text-transform: uppercase; letter-spacing: 0.12em; font-size: 0.74rem; font-weight: 800; color: var(--primary); }
h1 { margin: 0; font-size: clamp(2.3rem, 6vw, 4.6rem); line-height: 0.96; letter-spacing: -0.055em; }
.subtitle { margin: 14px 0 0; max-width: 620px; color: var(--muted); font-size: 1.08rem; line-height: 1.55; }

.layout { display: grid; gap: 22px; }
.card { background: rgba(255,255,255,0.95); border: 1px solid rgba(208,213,221,0.9); border-radius: 22px; box-shadow: var(--shadow); }
.setup-card { padding: 26px; }
.section-heading { display: flex; gap: 14px; align-items: flex-start; margin-bottom: 24px; }
.section-heading h2 { margin: 0 0 4px; font-size: 1.32rem; }
.section-heading p { margin: 0; color: var(--muted); }
.step { display: grid; place-items: center; flex: 0 0 32px; height: 32px; border-radius: 50%; background: var(--primary-soft); color: var(--primary); font-weight: 800; }

.field { display: grid; gap: 8px; font-weight: 650; }
.field > span { display: flex; justify-content: space-between; gap: 8px; font-size: 0.9rem; }
.field output { color: var(--primary); font-weight: 800; }
.full-width { width: 100%; }
input[type="url"], select {
  width: 100%;
  min-height: 44px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: white;
  color: var(--ink);
  padding: 10px 12px;
  outline: none;
}
input[type="url"]:focus, select:focus { border-color: var(--primary); box-shadow: 0 0 0 4px rgba(21,94,239,0.12); }
input[type="range"] { width: 100%; accent-color: var(--primary); }
.input-row { display: grid; grid-template-columns: 1fr auto; gap: 10px; }
.source-actions { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; margin-top: 14px; }
.checkbox-row { display: inline-flex; align-items: center; gap: 8px; color: var(--muted); font-size: 0.92rem; }
.helper { color: var(--muted); line-height: 1.55; font-size: 0.9rem; }
.inline-status { margin-top: 14px; padding: 10px 12px; border-radius: 10px; background: var(--surface-alt); color: var(--muted); font-size: 0.92rem; }
.inline-status[data-type="success"] { background: var(--success-soft); color: var(--success); }
.inline-status[data-type="error"] { background: var(--danger-soft); color: var(--danger); }
.inline-status[data-type="loading"] { background: var(--primary-soft); color: var(--primary); }

.button { min-height: 42px; border: 1px solid transparent; border-radius: 10px; padding: 10px 15px; font-weight: 750; transition: transform 120ms ease, background 120ms ease; }
.button:not(:disabled):active { transform: translateY(1px); }
.button.primary { background: var(--primary); color: white; }
.button.primary:hover:not(:disabled) { background: var(--primary-dark); }
.button.secondary { background: white; color: var(--ink); border-color: var(--border); }
.button.secondary:hover:not(:disabled) { background: var(--surface-alt); }
.button.ghost { background: transparent; color: var(--primary); border-color: rgba(21,94,239,0.25); }
.button.danger { background: var(--danger-soft); color: var(--danger); border-color: #fecdca; }
.file-button { display: inline-grid; place-items: center; }
.start-button { width: 100%; margin-top: 24px; min-height: 50px; font-size: 1rem; }

.mapping-panel { margin-top: 18px; padding: 18px; background: var(--surface-alt); border: 1px solid #eaecf0; border-radius: 14px; }
.mapping-panel h3 { margin: 0 0 14px; font-size: 1rem; }
.mapping-footer { display: flex; align-items: center; justify-content: space-between; gap: 14px; margin-top: 14px; color: var(--muted); }
.grid { display: grid; gap: 16px; }
.three-columns { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.two-columns { grid-template-columns: repeat(2, minmax(0, 1fr)); }

.mode-picker { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; border: 0; padding: 0; margin: 22px 0; }
.mode-picker legend { margin-bottom: 10px; font-size: 0.9rem; font-weight: 700; }
.mode-card { display: flex; align-items: flex-start; gap: 12px; border: 1px solid var(--border); border-radius: 14px; padding: 16px; cursor: pointer; background: white; }
.mode-card:has(input:checked) { border-color: var(--primary); background: var(--primary-soft); box-shadow: 0 0 0 3px rgba(21,94,239,0.08); }
.mode-card input { margin-top: 3px; accent-color: var(--primary); }
.mode-copy { display: grid; gap: 5px; }
.mode-copy small { color: var(--muted); line-height: 1.4; }

.notice { margin-bottom: 18px; padding: 13px 15px; border-radius: 12px; }
.notice.warning { background: var(--warning-soft); color: var(--warning); border: 1px solid #fedf89; }

.player-card { padding: 28px; }
.player-topline { display: flex; justify-content: space-between; gap: 12px; align-items: center; font-weight: 700; }
.player-topline > div { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.badge { display: inline-flex; padding: 4px 8px; border-radius: 999px; background: var(--surface-alt); color: var(--muted); font-size: 0.78rem; }
.status-badge { padding: 6px 10px; border-radius: 999px; background: var(--surface-alt); color: var(--muted); font-size: 0.82rem; }
.status-badge[data-status="running"], .status-badge[data-status="listening"], .status-badge[data-status="waiting"] { background: var(--primary-soft); color: var(--primary); }
.status-badge[data-status="paused"] { background: var(--warning-soft); color: var(--warning); }
.status-badge[data-status="complete"] { background: var(--success-soft); color: var(--success); }
.progress-track { height: 7px; margin: 14px 0 24px; background: #eaecf0; border-radius: 99px; overflow: hidden; }
.progress-track > div { height: 100%; width: 0; background: var(--primary); transition: width 200ms ease; }
.question-card, .answer-card, .response-card { border-radius: 18px; padding: 22px; }
.question-card { background: var(--ink); color: white; }
.answer-card { margin-top: 12px; background: var(--success-soft); color: #054f31; border: 1px solid #abefc6; }
.response-card { margin-top: 12px; background: var(--primary-soft); border: 1px solid #b2ccff; }
.card-label { display: block; margin-bottom: 10px; font-size: 0.72rem; font-weight: 850; letter-spacing: 0.1em; text-transform: uppercase; opacity: 0.68; }
.question-card p, .answer-card p, .response-card p { margin: 0; font-size: clamp(1.1rem, 2.5vw, 1.45rem); line-height: 1.5; }
.response-card small { display: block; margin-top: 9px; color: var(--muted); }
.listening { display: inline-flex; align-items: center; gap: 5px; margin-top: 14px; color: var(--primary); font-weight: 700; }
.listening span { width: 5px; height: 14px; border-radius: 4px; background: var(--primary); animation: pulse 850ms infinite ease-in-out; }
.listening span:nth-child(2) { animation-delay: 120ms; }
.listening span:nth-child(3) { animation-delay: 240ms; }
@keyframes pulse { 0%,100% { transform: scaleY(0.45); } 50% { transform: scaleY(1); } }

.review-decision {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  margin-top: 14px;
  padding: 14px;
  border: 1px solid #fedf89;
  border-radius: 14px;
  background: var(--warning-soft);
  color: #7a2e0e;
}
.review-decision > span { line-height: 1.45; font-size: 0.92rem; }
.review-decision > div { display: flex; flex-wrap: wrap; gap: 8px; flex: 0 0 auto; }

.transport-controls { display: flex; flex-wrap: wrap; justify-content: center; gap: 10px; margin-top: 22px; }
.icon-button { width: 44px; height: 44px; border-radius: 50%; border: 1px solid var(--border); background: white; font-size: 1.25rem; }
.shortcut-help { margin: 14px 0 0; text-align: center; color: var(--muted); font-size: 0.82rem; }

footer { margin-top: 24px; color: var(--muted); font-size: 0.82rem; line-height: 1.5; text-align: center; }

@media (max-width: 760px) {
  .page-shell { width: min(100% - 20px, 1120px); padding-top: 24px; }
  .site-header { align-items: center; }
  .input-row { grid-template-columns: 1fr; }
  .three-columns, .two-columns, .mode-picker { grid-template-columns: 1fr; }
  .mapping-footer { align-items: stretch; flex-direction: column; }
  .setup-card, .player-card { padding: 20px; border-radius: 18px; }
  .transport-controls .button { flex: 1 1 110px; }
  .player-topline { align-items: flex-start; }
  .review-decision { align-items: stretch; flex-direction: column; }
  .review-decision > div { width: 100%; }
  .review-decision .button { flex: 1 1 100px; }
}