/* ===================================================================
   Nimbus chat widget — scoped styles
   All classes prefixed with .nimbus-chat-widget__ to avoid collisions.
   Inherits design tokens from styles.css :root (--accent, --bg, etc.)
   =================================================================== */

.nimbus-chat-widget {
  --w-accent: var(--accent, #06B6D4);
  --w-accent-deep: var(--accent-deep, #0E7490);
  --w-bg: rgba(8, 9, 15, 0.92);
  --w-bg-card: var(--bg-card, #11141C);
  --w-border: rgba(255, 255, 255, 0.08);
  --w-text: var(--text, #ECEEF3);
  --w-text-dim: var(--text-dim, #8B92A5);

  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 9999;
  font-family: var(--font-sans, 'Inter', -apple-system, system-ui, sans-serif);
  color: var(--w-text);
  line-height: 1.5;
}

/* ============ Toggle button ============ */
.nimbus-chat-widget__button {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 20px;
  background: var(--w-bg);
  border: 1px solid var(--w-accent);
  border-radius: 999px;
  color: var(--w-text);
  font: inherit;
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  box-shadow:
    0 4px 24px rgba(0, 0, 0, 0.35),
    0 0 0 0 rgba(6, 182, 212, 0.0);
  transition: box-shadow 0.2s ease, transform 0.2s ease;
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
}

.nimbus-chat-widget__button:hover {
  box-shadow:
    0 6px 28px rgba(0, 0, 0, 0.45),
    0 0 0 6px rgba(6, 182, 212, 0.12);
  transform: translateY(-1px);
}

.nimbus-chat-widget__button:focus-visible {
  outline: 2px solid var(--w-accent);
  outline-offset: 3px;
}

.nimbus-chat-widget__button svg {
  width: 18px;
  height: 18px;
  color: var(--w-accent);
  flex-shrink: 0;
}

.nimbus-chat-widget--open .nimbus-chat-widget__button {
  display: none;
}

/* ============ Panel ============ */
.nimbus-chat-widget__panel {
  display: none;
  flex-direction: column;
  width: 380px;
  height: 560px;
  max-height: calc(100vh - 48px);
  background: var(--w-bg);
  border: 1px solid var(--w-border);
  border-radius: 16px;
  overflow: hidden;
  box-shadow: 0 16px 56px rgba(0, 0, 0, 0.55);
  -webkit-backdrop-filter: blur(20px);
  backdrop-filter: blur(20px);
}

.nimbus-chat-widget--open .nimbus-chat-widget__panel {
  display: flex;
}

/* ============ Header ============ */
.nimbus-chat-widget__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 18px;
  border-bottom: 1px solid var(--w-border);
  flex-shrink: 0;
}

.nimbus-chat-widget__header-title {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-weight: 600;
  font-size: 14px;
}

.nimbus-chat-widget__status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #28C840;
  box-shadow: 0 0 8px rgba(40, 200, 64, 0.6);
}

.nimbus-chat-widget__close {
  background: transparent;
  border: 0;
  cursor: pointer;
  color: var(--w-text-dim);
  padding: 4px;
  display: inline-flex;
  align-items: center;
  border-radius: 6px;
  transition: color 0.15s ease, background-color 0.15s ease;
}

.nimbus-chat-widget__close:hover {
  color: var(--w-text);
  background: rgba(255, 255, 255, 0.06);
}

.nimbus-chat-widget__close svg {
  width: 18px;
  height: 18px;
}

/* ============ Messages ============ */
.nimbus-chat-widget__messages {
  flex: 1;
  overflow-y: auto;
  padding: 16px 18px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  scroll-behavior: smooth;
}

.nimbus-chat-widget__message {
  display: flex;
  flex-direction: column;
  max-width: 85%;
  gap: 4px;
}

.nimbus-chat-widget__message--user {
  align-self: flex-end;
  align-items: flex-end;
}

.nimbus-chat-widget__message--bot {
  align-self: flex-start;
  align-items: flex-start;
}

.nimbus-chat-widget__bubble {
  padding: 10px 14px;
  border-radius: 14px;
  font-size: 14px;
  line-height: 1.5;
  word-wrap: break-word;
  white-space: pre-wrap;
}

.nimbus-chat-widget__message--user .nimbus-chat-widget__bubble {
  background: var(--w-accent);
  color: #06121A;
  border-bottom-right-radius: 4px;
}

.nimbus-chat-widget__message--bot .nimbus-chat-widget__bubble {
  background: var(--w-bg-card);
  border: 1px solid var(--w-border);
  border-bottom-left-radius: 4px;
}

.nimbus-chat-widget__timestamp {
  font-family: var(--font-mono, 'JetBrains Mono', ui-monospace, monospace);
  font-size: 10px;
  color: var(--w-text-dim);
  letter-spacing: 0.02em;
}

/* ============ Loader ============ */
.nimbus-chat-widget__loader {
  align-self: flex-start;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 12px 14px;
  background: var(--w-bg-card);
  border: 1px solid var(--w-border);
  border-radius: 14px;
  border-bottom-left-radius: 4px;
}

.nimbus-chat-widget__dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--w-text-dim);
  animation: nimbus-chat-widget-dot 1.4s infinite ease-in-out both;
}

.nimbus-chat-widget__dot:nth-child(2) { animation-delay: 0.16s; }
.nimbus-chat-widget__dot:nth-child(3) { animation-delay: 0.32s; }

@keyframes nimbus-chat-widget-dot {
  0%, 80%, 100% { opacity: 0.3; transform: translateY(0); }
  40% { opacity: 1; transform: translateY(-2px); }
}

/* ============ Chips ============ */
.nimbus-chat-widget__chips {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.nimbus-chat-widget__chip {
  background: transparent;
  border: 1px solid var(--w-border);
  border-radius: 999px;
  padding: 6px 12px;
  color: var(--w-text-dim);
  font: inherit;
  font-size: 12px;
  cursor: pointer;
  transition: border-color 0.15s ease, color 0.15s ease;
  text-align: left;
}

.nimbus-chat-widget__chip:hover {
  border-color: var(--w-accent);
  color: var(--w-text);
}

.nimbus-chat-widget__chip:focus-visible {
  outline: 2px solid var(--w-accent);
  outline-offset: 2px;
}

.nimbus-chat-widget__chip:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* ============ Input form ============ */
.nimbus-chat-widget__form {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 18px;
  border-top: 1px solid var(--w-border);
  flex-shrink: 0;
}

.nimbus-chat-widget__input {
  flex: 1;
  min-width: 0;
  background: var(--w-bg-card);
  border: 1px solid var(--w-border);
  border-radius: 10px;
  padding: 10px 14px;
  color: var(--w-text);
  font: inherit;
  font-size: 14px;
  outline: none;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.nimbus-chat-widget__input::placeholder {
  color: var(--w-text-dim);
}

.nimbus-chat-widget__input:focus {
  border-color: var(--w-accent);
  box-shadow: 0 0 0 3px rgba(6, 182, 212, 0.15);
}

.nimbus-chat-widget__input:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.nimbus-chat-widget__send {
  flex-shrink: 0;
  width: 40px;
  height: 40px;
  background: var(--w-accent);
  border: 0;
  border-radius: 10px;
  color: #06121A;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: opacity 0.15s ease, background-color 0.15s ease;
}

.nimbus-chat-widget__send:hover { background: var(--w-accent-deep); color: #ffffff; }
.nimbus-chat-widget__send:focus-visible { outline: 2px solid var(--w-accent); outline-offset: 2px; }
.nimbus-chat-widget__send:disabled { opacity: 0.4; cursor: not-allowed; background: var(--w-accent); color: #06121A; }
.nimbus-chat-widget__send svg { width: 18px; height: 18px; }

/* ============ Footer ============ */
.nimbus-chat-widget__footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 18px 12px;
  font-size: 11px;
  color: var(--w-text-dim);
  flex-shrink: 0;
}

.nimbus-chat-widget__clear {
  background: transparent;
  border: 0;
  color: var(--w-text-dim);
  cursor: pointer;
  font: inherit;
  font-size: 11px;
  text-decoration: underline;
  text-underline-offset: 2px;
  padding: 0;
}

.nimbus-chat-widget__clear:hover { color: var(--w-text); }
.nimbus-chat-widget__clear:focus-visible { outline: 2px solid var(--w-accent); outline-offset: 2px; }

.nimbus-chat-widget__footer-text {
  font-family: var(--font-mono, 'JetBrains Mono', ui-monospace, monospace);
  font-size: 10px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

/* ============ Mobile ============ */
@media (max-width: 640px) {
  .nimbus-chat-widget {
    bottom: 16px;
    right: 16px;
  }

  .nimbus-chat-widget__button {
    width: 52px;
    height: 52px;
    padding: 0;
    justify-content: center;
  }

  .nimbus-chat-widget__button-label {
    display: none;
  }

  .nimbus-chat-widget--open {
    inset: 0;
    bottom: 0;
    right: 0;
  }

  .nimbus-chat-widget--open .nimbus-chat-widget__panel {
    width: 100vw;
    height: 100vh;
    max-height: none;
    border-radius: 0;
    border: 0;
  }
}

/* ============ Reduced motion ============ */
@media (prefers-reduced-motion: reduce) {
  .nimbus-chat-widget__button,
  .nimbus-chat-widget__close,
  .nimbus-chat-widget__chip,
  .nimbus-chat-widget__input,
  .nimbus-chat-widget__send,
  .nimbus-chat-widget__messages {
    transition: none;
    scroll-behavior: auto;
  }
  .nimbus-chat-widget__dot {
    animation: none;
    opacity: 0.6;
  }
}