/* ═══════════════════════════════════════════════════════════════════════════
   NEXUS File Picker + Button States v1
   
   Two separate concerns in one file since they're both about making
   mobile UX readable and obvious:
   
     1. FILE PICKER POPUP — bottom sheet with 3 big buttons
     2. BUTTON STATE REDESIGN — mic/voice/send with clear visual states
   ═══════════════════════════════════════════════════════════════════════════ */

/* ─── FILE PICKER POPUP ────────────────────────────────────────────────── */

.nx-fp-popup {
  position: fixed;
  inset: 0;
  z-index: 6000;
  display: flex;
  align-items: flex-end;
  justify-content: center;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  animation: nxFpFade 0.18s ease-out;
}
@keyframes nxFpFade { from { opacity: 0; } to { opacity: 1; } }

.nx-fp-bg {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.65);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.nx-fp-card {
  position: relative;
  width: 100%;
  max-width: 420px;
  background: rgba(18, 15, 22, 0.98);
  border: 1px solid var(--nx-gold-line-2);
  border-radius: 20px 20px 0 0;
  padding: 16px 14px max(16px, env(safe-area-inset-bottom));
  margin: 0 auto;
  animation: nxFpSlideUp 0.22s cubic-bezier(0.22, 1, 0.36, 1);
  box-shadow: 0 -8px 40px rgba(0, 0, 0, 0.5);
}
@keyframes nxFpSlideUp {
  from { transform: translateY(20px); }
  to { transform: translateY(0); }
}
@media (min-width: 600px) {
  .nx-fp-popup { align-items: center; }
  .nx-fp-card { border-radius: 24px; }
}

.nx-fp-title {
  text-align: center;
  font-size: 12px;
  font-weight: 700;
  color: var(--accent, var(--accent));
  margin-bottom: 14px;
  text-transform: uppercase;
  letter-spacing: 0.8px;
}

.nx-fp-options {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 12px;
}

.nx-fp-btn {
  display: flex;
  align-items: center;
  gap: 14px;
  width: 100%;
  padding: 16px 18px;
  background: rgba(20, 18, 26, 0.8);
  border: 1.5px solid var(--nx-gold-line);
  border-radius: 18px;
  color: var(--text, #e6dccc);
  font-family: inherit;
  cursor: pointer;
  text-align: left;
  transition: all 0.15s ease-out;
  -webkit-tap-highlight-color: transparent;
}
.nx-fp-btn:active {
  background: var(--nx-gold-soft);
  border-color: var(--accent, var(--accent));
  transform: scale(0.98);
}
.nx-fp-btn:hover {
  border-color: var(--nx-gold-line-3);
}

.nx-fp-icon {
  font-size: 32px;
  line-height: 1;
  flex-shrink: 0;
  width: 44px;
  text-align: center;
}

.nx-fp-name {
  flex: 1;
  font-size: 15px;
  font-weight: 700;
  color: var(--accent, var(--accent));
}

.nx-fp-sub {
  font-size: 11px;
  color: var(--muted, #8a826f);
  display: block;
  margin-top: 2px;
  font-weight: 400;
}

/* Label stack inside the row */
.nx-fp-btn .nx-fp-name + .nx-fp-sub {
  display: none;
}
.nx-fp-btn {
  flex-wrap: wrap;
}
.nx-fp-btn .nx-fp-icon {
  grid-row: span 2;
}
/* Simpler: flex-direction column for the text part */
.nx-fp-btn {
  display: grid;
  grid-template-columns: 44px 1fr;
  grid-template-rows: auto auto;
  align-items: center;
  column-gap: 14px;
  row-gap: 0;
}
.nx-fp-btn .nx-fp-icon {
  grid-row: 1 / span 2;
  grid-column: 1;
  align-self: center;
}
.nx-fp-btn .nx-fp-name {
  grid-row: 1;
  grid-column: 2;
}
.nx-fp-btn .nx-fp-sub {
  grid-row: 2;
  grid-column: 2;
  display: block;
  margin-top: 1px;
}

.nx-fp-cancel {
  width: 100%;
  padding: 13px;
  background: transparent;
  border: 1px solid var(--nx-gold-line);
  border-radius: 16px;
  color: var(--muted, #8a826f);
  font-family: inherit;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.12s;
  -webkit-tap-highlight-color: transparent;
}
.nx-fp-cancel:active {
  background: var(--nx-gold-faint);
  color: var(--text, #e6dccc);
}

/* Light theme */
[data-theme="light"] .nx-fp-card {
  background: rgba(250, 248, 245, 0.98);
}
[data-theme="light"] .nx-fp-btn {
  background: white;
  border-color: var(--nx-gold-aura);
}

/* ═══════════════════════════════════════════════════════════════════════════
   CHAT HUD BUTTON STATES — FULL REDESIGN
   
   Before: subtle border-color changes that were impossible to read on mobile.
   After: clear solid fills when active, red pulsing ring when recording,
   amber glow when voice toggle is on, disabled state for send button.
   
   Each button now has THREE clear visual states:
     • default  — dark circle, muted icon color
     • active   — solid amber fill, dark icon (or red for recording)  
     • disabled — faded, no interaction
   ═══════════════════════════════════════════════════════════════════════════ */

/* Base — overrides the subtle default in nexus.css */
.hud-tool-btn,
.btn-mic,
.btn-voice,
.btn-mic-float,
.btn-voice-float {
  position: relative;
  border: 1.5px solid var(--nx-gold-aura) !important;
  background: rgba(20, 18, 26, 0.85) !important;
  color: var(--muted, #8a826f) !important;
  transition: all 0.18s ease-out !important;
}

/* Press feedback on ALL buttons — scale down for tactile feel */
.hud-tool-btn:active,
.btn-mic:active,
.btn-voice:active,
.btn-send:active:not(:disabled),
.btn-mic-float:active,
.btn-voice-float:active {
  transform: scale(0.9);
}

/* ─── MIC — RECORDING STATE ─────────────────────────────────────────────── */
/* When actively recording, the mic button becomes a solid red circle with
   a pulsing ring around it — impossible to miss. */
.btn-mic.recording,
.btn-mic-float.recording {
  background: #e74c3c !important;
  border-color: #e74c3c !important;
  color: white !important;
  box-shadow:
    0 0 0 4px rgba(231, 76, 60, 0.25),
    0 0 20px rgba(231, 76, 60, 0.45) !important;
  animation: nxMicPulse 1.1s ease-in-out infinite !important;
}
@keyframes nxMicPulse {
  0%, 100% {
    box-shadow:
      0 0 0 4px rgba(231, 76, 60, 0.25),
      0 0 20px rgba(231, 76, 60, 0.45);
    transform: scale(1);
  }
  50% {
    box-shadow:
      0 0 0 10px rgba(231, 76, 60, 0.08),
      0 0 28px rgba(231, 76, 60, 0.65);
    transform: scale(1.05);
  }
}

/* ─── VOICE TOGGLE — ON STATE ───────────────────────────────────────────── */
/* When TTS playback is enabled, voice button shows solid amber fill
   with subtle glow so user knows responses will be spoken. */
.btn-voice.on,
.btn-voice-float.on {
  background: var(--accent, var(--accent)) !important;
  border-color: var(--accent, var(--accent)) !important;
  color: #101626 !important;
  box-shadow:
    0 0 0 3px var(--nx-gold-haze),
    0 2px 12px var(--nx-gold-line-2) !important;
}

/* ─── CAMERA BUTTON — subtle hover/active to signal interactivity ───────── */
.hud-tool-btn:hover {
  border-color: var(--accent, var(--accent)) !important;
  color: var(--accent, var(--accent)) !important;
}

/* ─── SEND BUTTON — ENABLED vs DISABLED ─────────────────────────────────── */
/* Send button is ALWAYS amber (it's the primary action) but clearly
   disabled when input is empty. */
.btn-send {
  background: var(--accent, var(--accent)) !important;
  color: #101626 !important;
  border: none !important;
  transition: all 0.18s !important;
}
.btn-send:not(:disabled) {
  box-shadow: 0 2px 10px var(--nx-gold-line-2) !important;
}
.btn-send:disabled {
  opacity: 0.3 !important;
  box-shadow: none !important;
  cursor: default !important;
}

/* ─── LABELED PILLS UNDER BUTTONS (tooltips visible always on focus) ────── */
/* Optional tiny label that appears on active state so meaning is obvious */
.btn-voice.on::after {
  content: 'ON';
  position: absolute;
  top: calc(100% + 4px);
  left: 50%;
  transform: translateX(-50%);
  font-size: 8px;
  font-weight: 700;
  letter-spacing: 0.6px;
  color: var(--accent, var(--accent));
  background: rgba(20, 18, 26, 0.95);
  padding: 2px 6px;
  border-radius: 3px;
  white-space: nowrap;
  pointer-events: none;
  animation: nxFpFade 0.2s;
}
.btn-mic.recording::after,
.btn-mic-float.recording::after {
  content: 'REC';
  position: absolute;
  top: calc(100% + 4px);
  left: 50%;
  transform: translateX(-50%);
  font-size: 8px;
  font-weight: 800;
  letter-spacing: 0.6px;
  color: #e74c3c;
  background: rgba(20, 18, 26, 0.95);
  padding: 2px 7px;
  border-radius: 3px;
  white-space: nowrap;
  pointer-events: none;
}

/* Light theme adjustments */
[data-theme="light"] .hud-tool-btn,
[data-theme="light"] .btn-mic,
[data-theme="light"] .btn-voice {
  background: rgba(255, 255, 255, 0.9) !important;
}