/* ── Display panel ────────────────────────────────────────────────── */

#display-panel {
  position: fixed;
  inset: 0;
  overflow: hidden;
}

#display-bg {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background-color 0.5s ease;
}

/* Traffic light states */
#display-bg.traffic-idle    { background: var(--bg-primary); }
#display-bg.traffic-green   { background: #052e10; }
#display-bg.traffic-yellow  { background: #3a2e00; }
#display-bg.traffic-red     { background: #3a0000; }
#display-bg.traffic-overtime { background: var(--color-overtime); }

/* Flash animation for overtime */
#display-bg.flash-overtime {
  animation: flashStrobe 0.5s ease-in-out infinite alternate;
}

@keyframes flashStrobe {
  from { filter: brightness(1); }
  to   { filter: brightness(2.5); }
}

#display-inner {
  width: 100%;
  max-width: 1200px;
  padding: var(--space-xl);
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: clamp(var(--space-sm), 2vh, var(--space-xl));
}

/* Clock row */
#clock-row {
  display: flex;
  gap: var(--space-xl);
  font-family: var(--font-mono);
  font-size: clamp(1rem, 2.5vw, 1.6rem);
  color: rgba(255,255,255,0.7);
  letter-spacing: 0.05em;
}

#planned-end::before { content: '→ '; opacity: 0.6; }

/* Main countdown */
#countdown {
  line-height: 1;
}

#countdown-time {
  font-family: var(--font-display);
  font-size: clamp(4rem, 22vw, 18rem);
  font-weight: 700;
  color: #ffffff;
  letter-spacing: -0.02em;
  display: block;
  text-shadow: 0 0 60px rgba(255,255,255,0.15);
  transition: color 0.3s ease;
}

/* Overtime — counting UP, shown in bright red/white */
#display-bg.traffic-overtime #countdown-time {
  color: #ffffff;
}

/* Speaker info */
#speaker-info {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

#speaker-name {
  font-size: clamp(1.4rem, 4vw, 3.5rem);
  font-weight: 600;
  color: #ffffff;
}

#speaker-title {
  font-size: clamp(1rem, 2.5vw, 2rem);
  color: rgba(255,255,255,0.75);
  font-style: italic;
}

/* Next speaker */
#next-speaker-row {
  font-size: clamp(0.8rem, 1.8vw, 1.3rem);
  color: rgba(255,255,255,0.55);
  display: flex;
  gap: var(--space-sm);
  align-items: center;
}
#next-speaker-row.hidden { display: none; }

.next-label {
  font-weight: 600;
  text-transform: uppercase;
  font-size: 0.8em;
  letter-spacing: 0.1em;
}

/* Custom message overlay */
#custom-message {
  position: absolute;
  top: var(--space-xl);
  left: 50%;
  transform: translateX(-50%);
  background: rgba(0,0,0,0.75);
  color: #ffffff;
  padding: var(--space-md) var(--space-xl);
  border-radius: var(--radius-lg);
  font-size: clamp(1rem, 3vw, 2rem);
  max-width: 80%;
  text-align: center;
  border: 1px solid rgba(255,255,255,0.2);
  backdrop-filter: blur(8px);
  z-index: var(--z-overlay);
}
#custom-message.hidden { display: none; }

/* Pairing panel (shown when no controller connected) */
#pairing-panel {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-md);
  padding: var(--space-lg);
  background: rgba(0,0,0,0.85);
  backdrop-filter: blur(8px);
  color: rgba(255,255,255,0.9);
  overflow-y: auto;
}
#pairing-panel.hidden { display: none; }

/* Tab strip */
#d-pair-tabs {
  display: flex;
  gap: 2px;
  background: rgba(255,255,255,0.08);
  border-radius: var(--radius-lg);
  padding: 3px;
  flex-wrap: wrap;
  justify-content: center;
}

.d-pair-tab {
  background: none;
  color: rgba(255,255,255,0.6);
  border-radius: calc(var(--radius-lg) - 3px);
  padding: var(--space-sm) var(--space-md);
  font-size: clamp(0.75rem, 2vw, 0.9rem);
  transition: background var(--transition-fast), color var(--transition-fast);
}
.d-pair-tab.active {
  background: rgba(255,255,255,0.18);
  color: #ffffff;
  font-weight: 600;
}
.d-pair-tab:hover:not(.active) { color: rgba(255,255,255,0.85); }

/* Tab content panels */
.d-pair-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-md);
  width: 100%;
  max-width: 360px;
  animation: fadeIn 150ms ease;
}
.d-pair-content.hidden { display: none; }

@keyframes fadeIn { from { opacity: 0 } to { opacity: 1 } }

.pair-hint {
  font-size: clamp(0.8rem, 2vw, 1rem);
  color: rgba(255,255,255,0.6);
  text-align: center;
  margin: 0;
}

/* QR code display */
#display-qr canvas,
#d-offer-qr canvas,
.qr-wrapper canvas {
  width: min(180px, 45vw);
  height: min(180px, 45vw);
  border-radius: var(--radius-md);
  background: #fff;
  padding: 8px;
  display: block;
}

/* Pairing code badge */
.pairing-code {
  font-family: var(--font-mono);
  font-size: clamp(1.8rem, 6vw, 2.5rem);
  font-weight: 700;
  letter-spacing: 0.3em;
  color: #ffffff;
  background: rgba(255,255,255,0.1);
  padding: var(--space-sm) var(--space-lg);
  border-radius: var(--radius-md);
  border: 1px solid rgba(255,255,255,0.2);
  text-align: center;
}
.pairing-code.large { font-size: 3.5rem; }

/* Camera scanner */
#d-scan-video {
  width: min(260px, 70vw);
  height: min(260px, 70vw);
  border-radius: var(--radius-md);
  background: #000;
  object-fit: cover;
  display: none;
}
#d-scan-video.active { display: block; }

.d-scan-controls {
  display: flex;
  gap: var(--space-sm);
  flex-wrap: wrap;
  justify-content: center;
}

.d-file-label {
  display: inline-flex;
  align-items: center;
  background: var(--btn-neutral);
  color: var(--text-primary);
  border-radius: var(--radius-md);
  padding: var(--space-sm) var(--space-md);
  font-size: 1rem;
  cursor: pointer;
}
.d-file-label:hover { background: var(--btn-neutral-hover); }

/* Code input for display */
#d-pair-code input {
  background: rgba(255,255,255,0.1);
  border-color: rgba(255,255,255,0.3);
  color: #ffffff;
  width: 100%;
}
#d-pair-code input::placeholder { color: rgba(255,255,255,0.35); }

/* Offline SDP panel */
#d-sdp-step1, #d-sdp-step2 {
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.sdp-copy-row {
  display: flex;
  gap: var(--space-xs);
  align-items: flex-start;
  width: 100%;
}
.sdp-copy-row textarea {
  flex: 1;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  background: rgba(255,255,255,0.08);
  border-color: rgba(255,255,255,0.2);
  color: rgba(255,255,255,0.8);
  resize: none;
}
#d-pair-sdp textarea {
  background: rgba(255,255,255,0.08);
  border-color: rgba(255,255,255,0.2);
  color: rgba(255,255,255,0.8);
  width: 100%;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  resize: none;
}
#d-pair-sdp textarea::placeholder { color: rgba(255,255,255,0.3); }

#d-sdp-step2 { border-top: 1px solid rgba(255,255,255,0.12); padding-top: var(--space-md); }

/* Settings cog (always visible on display) */
#display-settings-btn {
  position: absolute;
  bottom: var(--space-md);
  right: var(--space-md);
  z-index: calc(var(--z-overlay) + 2);
  width: 2.75rem;
  height: 2.75rem;
  border-radius: 50%;
  background: rgba(255,255,255,0.1);
  border: 1px solid rgba(255,255,255,0.2);
  color: rgba(255,255,255,0.55);
  font-size: 1.3rem;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: background var(--transition-fast), color var(--transition-fast), transform 0.3s ease;
}
#display-settings-btn:hover {
  background: rgba(255,255,255,0.22);
  color: rgba(255,255,255,0.9);
}
#display-settings-btn.active {
  background: rgba(255,255,255,0.2);
  color: #fff;
  transform: rotate(45deg);
}

/* Overtime sign prefix */
#countdown-time[data-overtime="true"]::before {
  content: '+';
  color: rgba(255,255,255,0.8);
}

/* Controller SDP sub-tabs */
#ctrl-sdp-subtabs {
  display: flex;
  gap: var(--space-xs);
  margin-bottom: var(--space-md);
}
.ctrl-sdp-tab {
  background: var(--bg-tertiary);
  color: var(--text-secondary);
  border-radius: var(--radius-md);
  padding: var(--space-xs) var(--space-md);
  font-size: 0.85rem;
}
.ctrl-sdp-tab.active {
  background: var(--accent);
  color: #fff;
}

.sdp-copy-row {
  display: flex;
  gap: var(--space-xs);
  align-items: flex-start;
}