/* =============================================================
   AI COACH CHAT WIDGET
   Floating action button + slide-up chat panel.
   Depends on: tokens.css, nav.css
   ============================================================= */

/* ── Floating action button ─────────────────────────────────── */

#aiCoachFab {
  position: fixed;
  bottom: 80px; /* above 64px nav + 8px gap */
  right: 16px;
  width: 52px;
  height: 52px;
  border-radius: 50%;
  background: var(--primary, #5fa87e);
  border: none;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.45), 0 0 0 2px rgba(95, 168, 126, 0.3);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  z-index: 998; /* below nav (1000) and focus bar (999) */
  transition: transform 0.2s cubic-bezier(0.34, 1.56, 0.64, 1), box-shadow 0.2s ease, opacity 0.2s ease;
  padding: 0;
  margin: 0;
}

#aiCoachFab:hover {
  transform: scale(1.08) translateY(-2px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.5), 0 0 0 3px rgba(95, 168, 126, 0.4);
}

#aiCoachFab:active {
  transform: scale(0.95);
}

#aiCoachFab[hidden] {
  display: none;
}

/* Pulse ring when panel is closed (draw attention once) */
#aiCoachFab.aic-pulse::after {
  content: '';
  position: absolute;
  inset: -4px;
  border-radius: 50%;
  border: 2px solid var(--primary, #5fa87e);
  animation: aic-ring 1.4s ease-out 3;
}

@keyframes aic-ring {
  0%   { opacity: 1; transform: scale(1); }
  100% { opacity: 0; transform: scale(1.6); }
}

/* Shift FAB up when workout focus bar is visible */
.workout-active #aiCoachFab {
  bottom: 126px; /* 64px nav + 44px focus bar + 18px gap */
}

/* ── Chat panel backdrop ─────────────────────────────────────── */

#aiCoachBackdrop {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(3px);
  z-index: 1050;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s ease;
}

#aiCoachBackdrop.aic-open {
  opacity: 1;
  pointer-events: auto;
}

/* ── Chat panel ─────────────────────────────────────────────── */

#aiCoachPanel {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  height: 72vh;
  max-height: calc(100dvh - 64px); /* never cover the nav */
  background: var(--card-bg, #0f1510);
  border-radius: 22px 22px 0 0;
  border-top: 1px solid var(--border-color, #2a3a2e);
  box-shadow: 0 -8px 32px rgba(0, 0, 0, 0.55);
  z-index: 1060;
  display: flex;
  flex-direction: column;
  transform: translateY(100%);
  transition: transform 0.32s cubic-bezier(0.32, 0.72, 0, 1);
}

#aiCoachPanel.aic-open {
  transform: translateY(0);
}

/* ── Panel header ───────────────────────────────────────────── */

.aic-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 16px 12px;
  border-bottom: 1px solid var(--border-color, #2a3a2e);
  flex-shrink: 0;
}

.aic-header-drag {
  position: absolute;
  top: 8px;
  left: 50%;
  transform: translateX(-50%);
  width: 36px;
  height: 4px;
  background: var(--border-color, #2a3a2e);
  border-radius: 2px;
}

.aic-header-info {
  display: flex;
  align-items: center;
  gap: 10px;
}

.aic-avatar {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: linear-gradient(135deg, #1e3a28 0%, #2d5c40 100%);
  border: 2px solid var(--primary, #5fa87e);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  flex-shrink: 0;
}

.aic-name {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-color);
}

.aic-status {
  font-size: 0.72rem;
  color: var(--secondary-text);
}

.aic-status.aic-typing {
  color: var(--primary, #5fa87e);
}

.aic-header-actions {
  display: flex;
  align-items: center;
  gap: 6px;
}

.aic-clear-btn,
.aic-close-btn {
  width: 34px;
  height: 34px;
  border-radius: 50%;
  border: none;
  background: var(--surface-bg, #141e17);
  color: var(--secondary-text);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  padding: 0;
  margin: 0;
  box-shadow: none;
  transition: background 0.15s, color 0.15s;
}

.aic-clear-btn:hover,
.aic-close-btn:hover {
  background: var(--border-color, #2a3a2e);
  color: var(--text-color);
  transform: none;
  box-shadow: none;
}

/* ── Messages area ──────────────────────────────────────────── */

.aic-messages {
  flex: 1;
  overflow-y: auto;
  padding: 12px 14px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  scroll-behavior: smooth;
  -webkit-overflow-scrolling: touch;
}

.aic-messages::-webkit-scrollbar {
  width: 3px;
}
.aic-messages::-webkit-scrollbar-track { background: transparent; }
.aic-messages::-webkit-scrollbar-thumb { background: var(--border-color); border-radius: 2px; }

/* Welcome / empty state */
.aic-welcome {
  text-align: center;
  padding: 24px 16px;
  color: var(--secondary-text);
  font-size: 0.85rem;
  line-height: 1.6;
}

.aic-welcome-icon {
  font-size: 2.4rem;
  margin-bottom: 10px;
}

.aic-welcome h3 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-color);
  margin: 0 0 6px;
}

.aic-suggestions {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  justify-content: center;
  margin-top: 14px;
}

.aic-suggestion-chip {
  background: var(--surface-bg, #141e17);
  border: 1px solid var(--border-color, #2a3a2e);
  color: var(--text-color);
  border-radius: 20px;
  padding: 6px 12px;
  font-size: 0.78rem;
  cursor: pointer;
  font-family: 'Poppins', sans-serif;
  margin: 0;
  box-shadow: none;
  transition: background 0.15s, border-color 0.15s;
}

.aic-suggestion-chip:hover {
  background: var(--border-color, #2a3a2e);
  border-color: var(--primary, #5fa87e);
  transform: none;
  box-shadow: none;
}

/* Message bubbles */
.aic-msg {
  display: flex;
  flex-direction: column;
  max-width: 82%;
}

.aic-msg--user {
  align-self: flex-end;
  align-items: flex-end;
}

.aic-msg--ai {
  align-self: flex-start;
  align-items: flex-start;
}

.aic-bubble {
  padding: 9px 13px;
  border-radius: 18px;
  font-size: 0.88rem;
  line-height: 1.55;
  word-break: break-word;
  white-space: pre-wrap;
}

.aic-msg--user .aic-bubble {
  background: var(--primary, #5fa87e);
  color: #0b130d;
  border-bottom-right-radius: 5px;
}

.aic-msg--ai .aic-bubble {
  background: var(--surface-bg, #141e17);
  color: var(--text-color);
  border: 1px solid var(--border-color, #2a3a2e);
  border-bottom-left-radius: 5px;
}

.aic-msg-time {
  font-size: 0.68rem;
  color: var(--secondary-text);
  margin-top: 3px;
  padding: 0 4px;
}

/* Typing indicator */
.aic-typing-indicator {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 10px 14px;
  background: var(--surface-bg, #141e17);
  border: 1px solid var(--border-color, #2a3a2e);
  border-radius: 18px;
  border-bottom-left-radius: 5px;
  align-self: flex-start;
  width: fit-content;
}

.aic-dot {
  width: 7px;
  height: 7px;
  background: var(--secondary-text);
  border-radius: 50%;
  animation: aic-bounce 1.2s ease-in-out infinite;
}
.aic-dot:nth-child(2) { animation-delay: 0.2s; }
.aic-dot:nth-child(3) { animation-delay: 0.4s; }

@keyframes aic-bounce {
  0%, 60%, 100% { transform: translateY(0); opacity: 0.5; }
  30%            { transform: translateY(-5px); opacity: 1; }
}

/* Error state */
.aic-msg--error .aic-bubble {
  background: rgba(224, 80, 96, 0.12);
  border-color: rgba(224, 80, 96, 0.35);
  color: #e05060;
}

/* ── Input area ─────────────────────────────────────────────── */

.aic-input-area {
  display: flex;
  align-items: flex-end;
  gap: 8px;
  padding: 10px 14px 14px;
  border-top: 1px solid var(--border-color, #2a3a2e);
  background: var(--card-bg, #0f1510);
  flex-shrink: 0;
}

.aic-input {
  flex: 1;
  background: var(--surface-bg, #141e17);
  border: 1px solid var(--border-color, #2a3a2e);
  border-radius: 22px;
  padding: 10px 14px;
  color: var(--text-color);
  font-size: 15px; /* ≥16px avoids iOS zoom */
  font-family: 'Poppins', sans-serif;
  resize: none;
  max-height: 120px;
  min-height: 44px;
  line-height: 1.4;
  margin: 0;
  transition: border-color 0.2s ease;
  box-shadow: none;
  /* override base.css textarea styles */
  width: auto;
  box-sizing: border-box;
}

.aic-input:focus {
  outline: none;
  border-color: var(--primary, #5fa87e);
  box-shadow: 0 0 0 2px rgba(95, 168, 126, 0.2);
}

.aic-send-btn {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--primary, #5fa87e);
  border: none;
  color: #0b130d;
  font-size: 20px;
  font-weight: 700;
  cursor: pointer;
  flex-shrink: 0;
  padding: 0;
  margin: 0;
  box-shadow: none;
  transition: background 0.15s, transform 0.15s, opacity 0.15s;
  display: flex;
  align-items: center;
  justify-content: center;
}

.aic-send-btn:hover {
  background: var(--primary-dark, #3d7a5a);
  transform: scale(1.08);
  box-shadow: none;
}

.aic-send-btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
  transform: none;
}

/* ── Embedded view (inside Coach tab) ──────────────────────────*/

.aic-embedded {
  display: flex;
  flex-direction: column;
  height: calc(100dvh - 200px);
  min-height: 400px;
  background: var(--card-bg, #0f1510);
  border-radius: 16px;
  border: 1px solid var(--border-color, #2a3a2e);
  overflow: hidden;
  margin: 8px 0 16px;
}

.aic-embedded .aic-messages {
  flex: 1;
}

.aic-embedded .aic-input-area {
  border-radius: 0 0 16px 16px;
}