/*
 * Neron Signals — Chatbot v2
 * Modern AI chat surface. Mobile-first, expands gracefully on tablet/desktop.
 * Depends on design-tokens.css being loaded first.
 *
 * Layout:
 *   .ns-chat            — full-height grid (sidebar + main)
 *   .ns-chat__sidebar   — conversation list (collapsible on mobile)
 *   .ns-chat__main      — header + scroll area + composer
 *   .ns-chat__messages  — virtualised message list
 *   .ns-msg             — single message (user / assistant / system / error)
 *   .ns-composer        — input row (textarea + send button)
 *   .ns-suggest         — quick-reply chips when chat is empty
 */

/* Mobile (default): chat panel sits below the app header, fills the
 * remaining viewport, and lets the messages area scroll on its own.
 * Sidebar is a slide-in drawer (handled further down).
 */
.ns-chat {
  position: fixed;
  top: var(--ns-chrome-top, 56px);
  right: 0;
  bottom: var(--ns-chrome-bottom, 0px);
  left: 0;
  display: grid;
  grid-template-columns: 280px 1fr;
  background: var(--ns-surface-0);
  color: var(--ns-text-1);
  font-family: var(--ns-font-sans);
  /* Body already paid padding-top + padding-bottom for the fixed chrome
   * (see body.ns-chatbot-page rule below), so the chat panel just needs
   * to fill what's left. svh covers iOS Safari address-bar resize. */
  height: auto;
  min-height: 0;
  overflow: hidden;
  border-top: 1px solid var(--ns-surface-2);
  box-sizing: border-box;
}

/* Desktop / large-tablet: turn the chat into a centered floating card
 * inside the app shell. We add some breathing room top/bottom and a
 * radius so it reads as a panel, not the whole page.
 */
@media (min-width: 900px) {
  body.ns-chatbot-page .ns-chat {
    top: calc(var(--ns-chrome-top, 56px) + 24px);
    right: 24px;
    bottom: calc(var(--ns-chrome-bottom, 0px) + 24px);
    left: 24px;
    width: min(1240px, calc(100vw - 48px));
    height: auto;
    margin: 0 auto;
    border-radius: var(--ns-radius-xl);
    border: 1px solid var(--ns-surface-2);
    box-shadow: var(--ns-shadow-lg);
    grid-template-columns: 280px 1fr;
    overflow: hidden;
  }
  body.ns-chatbot-page .ns-chat__sidebar {
    position: static;
    transform: none;
    border-radius: var(--ns-radius-xl) 0 0 var(--ns-radius-xl);
  }
  body.ns-chatbot-page .ns-chat__main {
    border-radius: 0 var(--ns-radius-xl) var(--ns-radius-xl) 0;
    overflow: hidden;
  }
  body.ns-chatbot-page .ns-chat__sidebar-toggle,
  body.ns-chatbot-page .ns-chat__backdrop {
    display: none !important;
  }
}

@media (min-width: 1280px) {
  body.ns-chatbot-page .ns-chat {
    grid-template-columns: 300px 1fr;
  }
}

/* Sidebar collapses on mobile and is shown via .is-open */
.ns-chat__sidebar {
  background: var(--ns-surface-1);
  border-right: 1px solid var(--ns-surface-2);
  display: flex; flex-direction: column;
  min-width: 0;
  min-height: 0;
}
.ns-chat__sidebar-header {
  padding: var(--ns-space-4);
  display: flex; align-items: center; justify-content: space-between;
  gap: var(--ns-space-3);
  border-bottom: 1px solid var(--ns-surface-2);
}
.ns-chat__sidebar-title {
  font-weight: 600; font-size: var(--ns-text-base);
  color: var(--ns-text-1);
  display: flex; align-items: center; gap: var(--ns-space-2);
}
.ns-new-chat {
  display: inline-flex; align-items: center; gap: var(--ns-space-2);
  padding: var(--ns-space-2) var(--ns-space-3);
  background: var(--ns-grad-brand); color: #1a1300;
  border: none; border-radius: var(--ns-radius-md);
  font-weight: 600; font-size: var(--ns-text-sm);
  cursor: pointer; transition: transform var(--ns-dur-fast) var(--ns-ease);
}
.ns-new-chat:hover { transform: translateY(-1px); }
.ns-new-chat ion-icon { font-size: 1.05em; }

.ns-chat__history {
  flex: 1; overflow-y: auto;
  min-height: 0;
  padding: var(--ns-space-2);
  display: flex; flex-direction: column; gap: 2px;
}
.ns-history-item {
  padding: var(--ns-space-3);
  border-radius: var(--ns-radius-md);
  cursor: pointer;
  background: transparent;
  color: var(--ns-text-2);
  font-size: var(--ns-text-sm);
  border: 1px solid transparent;
  transition: background var(--ns-dur-fast) var(--ns-ease),
              color var(--ns-dur-fast) var(--ns-ease),
              border-color var(--ns-dur-fast) var(--ns-ease);
  display: flex; align-items: center; justify-content: space-between;
  gap: var(--ns-space-2);
}
.ns-history-item:hover { background: var(--ns-surface-2); color: var(--ns-text-1); }
.ns-history-item.is-active {
  background: var(--ns-brand-soft);
  color: var(--ns-text-1);
  border-color: var(--ns-brand);
}
.ns-history-item__title {
  flex: 1; min-width: 0;
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.ns-history-item__delete {
  background: transparent; border: 0; color: var(--ns-text-3);
  font-size: 1.1em; padding: 4px; border-radius: 6px;
  opacity: 0; transition: opacity var(--ns-dur-fast) var(--ns-ease),
                          color var(--ns-dur-fast) var(--ns-ease);
}
.ns-history-item:hover .ns-history-item__delete { opacity: 1; }
.ns-history-item__delete:hover { color: var(--ns-danger); background: rgba(255,57,111,.1); }

.ns-chat__history-empty {
  padding: var(--ns-space-6) var(--ns-space-4);
  color: var(--ns-text-3); font-size: var(--ns-text-sm);
  text-align: center;
}

/* ── Main column ──────────────────────────────────────────────── */
.ns-chat__main {
  display: flex; flex-direction: column; min-width: 0; min-height: 0;
  background: var(--ns-surface-0);
}

.ns-chat__header {
  flex: 0 0 auto;
  padding: var(--ns-space-3) var(--ns-space-4);
  display: flex; align-items: center; justify-content: space-between;
  gap: var(--ns-space-3);
  background: var(--ns-surface-1);
  border-bottom: 1px solid var(--ns-surface-2);
}
.ns-chat__brand {
  display: flex; align-items: center; gap: var(--ns-space-3); min-width: 0;
}
.ns-chat__avatar {
  width: 38px; height: 38px; border-radius: var(--ns-radius-pill);
  background: var(--ns-grad-brand);
  display: grid; place-items: center;
  font-weight: 700; color: #1a1300; font-size: var(--ns-text-base);
  flex: 0 0 auto;
  box-shadow: var(--ns-shadow-glow);
}
.ns-chat__avatar--img {
  /* Image variant: keep the brand gradient ring around the logo png. */
  padding: 4px;
  object-fit: contain;
  background: var(--ns-grad-brand);
}
.ns-chat__name      { font-weight: 600; font-size: var(--ns-text-base); }
.ns-chat__subtitle  { color: var(--ns-text-3); font-size: var(--ns-text-xs); }

.ns-chat__quota {
  display: inline-flex; align-items: center; gap: var(--ns-space-2);
  padding: var(--ns-space-1) var(--ns-space-3);
  background: var(--ns-surface-2); color: var(--ns-text-2);
  border-radius: var(--ns-radius-pill);
  font-size: var(--ns-text-xs); font-weight: 600;
}
.ns-chat__quota--warn  { background: var(--ns-danger-soft);  color: var(--ns-danger);  }
.ns-chat__quota--good  { background: var(--ns-success-soft); color: var(--ns-success); }

.ns-icon-btn {
  width: 38px; height: 38px;
  display: grid; place-items: center;
  background: var(--ns-surface-2); color: var(--ns-text-2);
  border: 0; border-radius: var(--ns-radius-md);
  cursor: pointer; font-size: 1.2em;
  transition: background var(--ns-dur-fast) var(--ns-ease), color var(--ns-dur-fast) var(--ns-ease);
}
.ns-icon-btn:hover { background: var(--ns-surface-3); color: var(--ns-text-1); }

/* ── Messages scroll ──────────────────────────────────────────── */
.ns-chat__messages {
  flex: 1 1 auto; overflow-y: auto;
  min-height: 0;
  padding: var(--ns-space-6) var(--ns-space-4);
  display: flex; flex-direction: column; gap: var(--ns-space-5);
  scroll-behavior: smooth;
}
.ns-chat__messages-inner {
  width: 100%; max-width: 760px; margin: 0 auto;
  display: flex; flex-direction: column; gap: var(--ns-space-5);
}

/* Empty state hero */
.ns-chat__empty {
  padding: var(--ns-space-12) var(--ns-space-4);
  text-align: center;
  display: flex; flex-direction: column; align-items: center; gap: var(--ns-space-4);
}
.ns-chat__empty-icon {
  width: 72px; height: 72px; border-radius: var(--ns-radius-pill);
  background: var(--ns-grad-brand);
  display: grid; place-items: center;
  font-size: 36px; color: #1a1300;
  box-shadow: var(--ns-shadow-glow);
}
.ns-chat__empty-title {
  font-size: var(--ns-text-2xl); font-weight: 700;
  background: linear-gradient(120deg, var(--ns-text-1), var(--ns-brand));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.ns-chat__empty-text { color: var(--ns-text-2); max-width: 460px; line-height: var(--ns-leading-relax); }

/* Quick-reply chips below empty state */
.ns-suggest {
  display: flex; flex-wrap: wrap; justify-content: center;
  gap: var(--ns-space-2);
  margin-top: var(--ns-space-4);
}
.ns-suggest__chip {
  padding: var(--ns-space-2) var(--ns-space-4);
  background: var(--ns-surface-1);
  border: 1px solid var(--ns-surface-3);
  color: var(--ns-text-1);
  border-radius: var(--ns-radius-pill);
  font-size: var(--ns-text-sm);
  cursor: pointer;
  transition: transform var(--ns-dur-fast) var(--ns-ease),
              border-color var(--ns-dur-fast) var(--ns-ease),
              background var(--ns-dur-fast) var(--ns-ease);
  display: inline-flex; align-items: center; gap: var(--ns-space-2);
}
.ns-suggest__chip:hover {
  transform: translateY(-2px);
  border-color: var(--ns-brand);
  background: var(--ns-surface-2);
}
.ns-suggest__chip ion-icon { color: var(--ns-brand); font-size: 1.1em; }

/* ── Single message ───────────────────────────────────────────── */
.ns-msg {
  display: flex; gap: var(--ns-space-3);
  align-items: flex-start;
  animation: ns-msg-in var(--ns-dur-base) var(--ns-ease-out);
}
@keyframes ns-msg-in {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}
.ns-msg__avatar {
  width: 32px; height: 32px; border-radius: var(--ns-radius-pill);
  flex: 0 0 auto;
  display: grid; place-items: center;
  font-size: 14px; font-weight: 700;
}
.ns-msg__avatar--bot {
  background: var(--ns-grad-brand); color: #1a1300;
}
.ns-msg__avatar--user {
  background: var(--ns-surface-3); color: var(--ns-text-1);
}
.ns-msg__bubble {
  background: var(--ns-surface-1);
  border: 1px solid var(--ns-surface-2);
  padding: var(--ns-space-4) var(--ns-space-5);
  border-radius: var(--ns-radius-lg);
  max-width: 78%;
  line-height: var(--ns-leading-relax);
  font-size: var(--ns-text-base);
  color: var(--ns-text-1);
  word-wrap: break-word;
}
.ns-msg--user { flex-direction: row-reverse; }
.ns-msg--user .ns-msg__bubble {
  background: var(--ns-brand-soft);
  border-color: rgba(245,180,23,.35);
}
.ns-msg--error .ns-msg__bubble {
  background: var(--ns-danger-soft);
  border-color: rgba(255,57,111,.35);
  color: var(--ns-danger);
}
/* Markdown content inside bubbles */
.ns-msg__bubble p:first-child { margin-top: 0; }
.ns-msg__bubble p:last-child  { margin-bottom: 0; }
.ns-msg__bubble strong        { color: var(--ns-brand); font-weight: 700; }
.ns-msg__bubble code {
  background: var(--ns-surface-2);
  padding: 2px 6px; border-radius: 4px;
  font-family: var(--ns-font-mono); font-size: .92em;
  color: var(--ns-text-1);
}
.ns-msg__bubble pre {
  background: var(--ns-surface-2);
  padding: var(--ns-space-3); border-radius: var(--ns-radius-md);
  overflow-x: auto; margin: var(--ns-space-3) 0;
  font-family: var(--ns-font-mono); font-size: var(--ns-text-sm);
}
.ns-msg__bubble pre code { background: transparent; padding: 0; }
.ns-msg__bubble ul, .ns-msg__bubble ol {
  padding-left: var(--ns-space-6); margin: var(--ns-space-2) 0;
}
.ns-msg__bubble li { margin: 4px 0; }
.ns-msg__bubble blockquote {
  border-left: 3px solid var(--ns-brand);
  padding-left: var(--ns-space-3);
  margin: var(--ns-space-3) 0; color: var(--ns-text-2); font-style: italic;
}
.ns-msg__image {
  margin-top: var(--ns-space-3);
  border-radius: var(--ns-radius-md);
  overflow: hidden;
  border: 1px solid var(--ns-surface-3);
  cursor: zoom-in;
  transition: transform var(--ns-dur-base) var(--ns-ease);
}
.ns-msg__image img { width: 100%; height: auto; display: block; }
.ns-msg__image:hover { transform: scale(1.01); }

/* Inline tool-running pill inside an assistant bubble (streaming UI) */
.ns-msg__tool {
  display: inline-flex; align-items: center; gap: var(--ns-space-2);
  margin-top: var(--ns-space-2);
  padding: 4px var(--ns-space-3);
  background: var(--ns-surface-2); color: var(--ns-text-2);
  border-radius: var(--ns-radius-pill);
  font-size: var(--ns-text-sm);
  line-height: 1.35;
}
.ns-msg__bubble--error {
  background: var(--ns-danger-soft) !important;
  border-color: rgba(255, 57, 111, .35) !important;
  color: var(--ns-danger) !important;
}

/* Typing dots while waiting for assistant */
.ns-typing { display: inline-flex; gap: 4px; padding: 4px 0; }
.ns-typing span {
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--ns-text-3);
  animation: ns-typing-bounce 1.2s infinite;
}
.ns-typing span:nth-child(2) { animation-delay: .15s; }
.ns-typing span:nth-child(3) { animation-delay: .30s; }
@keyframes ns-typing-bounce {
  0%,80%,100% { transform: translateY(0); opacity: .35; }
  40%        { transform: translateY(-4px); opacity: 1; }
}

/* ── Composer ─────────────────────────────────────────────────── */
.ns-composer {
  flex: 0 0 auto;
  padding: var(--ns-space-3) var(--ns-space-4) var(--ns-space-4);
  background: var(--ns-surface-1);
  border-top: 1px solid var(--ns-surface-2);
}
.ns-composer__inner {
  width: 100%; max-width: 760px; margin: 0 auto;
  display: flex; gap: var(--ns-space-3); align-items: flex-end;
}
.ns-composer__field {
  flex: 1 1 auto;
  display: flex; align-items: flex-end; gap: var(--ns-space-2);
  background: var(--ns-surface-2);
  border: 1px solid var(--ns-surface-3);
  border-radius: var(--ns-radius-lg);
  padding: var(--ns-space-2) var(--ns-space-3);
  transition: border-color var(--ns-dur-fast) var(--ns-ease),
              box-shadow var(--ns-dur-fast) var(--ns-ease);
}
.ns-composer__field:focus-within {
  border-color: var(--ns-brand);
  box-shadow: var(--ns-brand-glow);
}
.ns-composer__textarea {
  flex: 1; background: transparent; border: 0; outline: none;
  color: var(--ns-text-1);
  font: inherit; font-size: var(--ns-text-base);
  resize: none; padding: var(--ns-space-2) 0;
  max-height: 160px; min-height: 24px;
  line-height: var(--ns-leading-normal);
}
.ns-composer__textarea::placeholder { color: var(--ns-text-3); }
.ns-composer__send {
  width: 44px; height: 44px;
  border-radius: var(--ns-radius-md);
  background: var(--ns-grad-brand);
  border: 0; color: #1a1300;
  font-size: 1.25em;
  display: grid; place-items: center;
  cursor: pointer; flex: 0 0 auto;
  transition: transform var(--ns-dur-fast) var(--ns-ease), opacity var(--ns-dur-fast) var(--ns-ease);
}
.ns-composer__send:hover { transform: translateY(-1px); }
.ns-composer__send:disabled {
  opacity: .5; cursor: not-allowed; transform: none;
}
.ns-composer__hint {
  text-align: center; color: var(--ns-text-3);
  font-size: var(--ns-text-xs); margin-top: var(--ns-space-2);
}

/* ── Modal: fullscreen image lightbox ─────────────────────────── */
.ns-lightbox {
  position: fixed; inset: 0;
  background: rgba(0,0,0,.86);
  display: none; align-items: center; justify-content: center;
  padding: var(--ns-space-4);
  z-index: var(--ns-z-modal);
  animation: ns-fade-in var(--ns-dur-base) var(--ns-ease);
}
.ns-lightbox.is-open { display: flex; }
.ns-lightbox img { max-width: 100%; max-height: 92vh; border-radius: var(--ns-radius-md); }
.ns-lightbox__close {
  position: absolute; top: var(--ns-space-4); right: var(--ns-space-4);
  width: 40px; height: 40px;
  background: rgba(255,255,255,.1); color: white;
  border: 0; border-radius: var(--ns-radius-pill);
  font-size: 1.4em; display: grid; place-items: center; cursor: pointer;
}
@keyframes ns-fade-in {
  from { opacity: 0; }
  to   { opacity: 1; }
}

/* ── Sidebar mobile behaviour ─────────────────────────────────── */
@media (max-width: 768px) {
  .ns-chat { grid-template-columns: 1fr; }
  .ns-chat__sidebar {
    position: absolute; inset: 0 auto 0 0;
    width: 78%; max-width: 320px;
    transform: translateX(-100%);
    transition: transform var(--ns-dur-base) var(--ns-ease);
    z-index: var(--ns-z-overlay);
    box-shadow: var(--ns-shadow-lg);
  }
  .ns-chat__sidebar.is-open { transform: translateX(0); }
  .ns-chat__backdrop {
    position: absolute; inset: 0;
    background: rgba(0,0,0,.6);
    opacity: 0; pointer-events: none;
    transition: opacity var(--ns-dur-base) var(--ns-ease);
    z-index: calc(var(--ns-z-overlay) - 1);
  }
  .ns-chat__backdrop.is-open { opacity: 1; pointer-events: auto; }
  .ns-msg__bubble { max-width: 88%; }
}

/* Hide sidebar toggle on desktop */
.ns-chat__sidebar-toggle { display: none; }
@media (max-width: 768px) {
  .ns-chat__sidebar-toggle { display: grid; }
}

/* Keep the global header/menu visible so chat lives INSIDE the app shell.
 * The chat panel becomes a regular block element occupying the area below
 * the appHeader (and above the bottom menu / footer if present).
 *
 * --ns-chrome-top approximates the appHeader height; --ns-chrome-bottom
 * approximates the bottom-menu height when one is present. Pages that
 * choose to hide either can override these on body.
 */
body.ns-chatbot-page {
  /* .appHeader is { position: fixed; top: env(safe-area-inset-top); height: 56px }
   * .appBottomMenu is { position: fixed; bottom: 0; min-height: 56px }
   * — both account for safe-area on notched iOS devices. Mirror both
   * here so the chat panel sits between them, not under them. */
  --ns-chrome-top: calc(env(safe-area-inset-top, 0px) + 56px);
  --ns-chrome-bottom: calc(env(safe-area-inset-bottom, 0px) + 56px);
  margin: 0 !important;
  padding: 0 !important;
  padding-top: var(--ns-chrome-top) !important;
  padding-bottom: var(--ns-chrome-bottom) !important;
  height: 100vh !important;
  height: 100svh !important;
  overflow: hidden !important;
  overscroll-behavior: none;
}
body.ns-chatbot-page #appCapsule {
  /* appCapsule is the inner shell; we already paid the chrome offset on
   * <body>, so it sits flush. */
  padding: 0 !important;
  margin: 0 !important;
  background: var(--ns-surface-0);
  height: calc(100vh - var(--ns-chrome-top) - var(--ns-chrome-bottom));
  height: calc(100svh - var(--ns-chrome-top) - var(--ns-chrome-bottom));
  min-height: 0;
  overflow: hidden;
}