/* ============================================
   CHAT + DM + TRADE-THREADS CSS
   ============================================
   Extracted from base.css PR 4/8 (2026-05-15).
   Contains: Chat page layout, header, tabs, messages, input, context menu,
   plus DM conversation/thread, Owner Picker modal, and Trade Thread panels.
   Consumed by: js/components/pages/Chat.js and parts of TradeRoom.js
   (trade-thread-* classes are also referenced from TradeRoom — CSS is global). */

/* ===================================================================
   PHASE 4: Chat & Activity Feed Components
   =================================================================== */

/* ─── Chat Page Layout ──────────────────────────────────────── */

.chat-page {
  display: flex;
  flex-direction: column;
  height: 100vh;
  height: 100dvh;
  background: var(--bg-page);
  position: relative;
  overflow: hidden;
}

/* ─── Chat Header ───────────────────────────────────────────── */

.chat-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  background: var(--color-structure-primary, #317b9b);
  border-bottom: 3px solid var(--color-accent-aqua, #44a1bb);
  flex-shrink: 0;
}

.chat-header-btn {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  border: none;
  background: var(--scrim-white-medium);
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  min-height: 44px;
  min-width: 44px;
}

.chat-header-btn:active {
  background: rgba(255, 255, 255, 0.25);
}

.chat-header-title {
  font-family: var(--font-display, 'Bebas Neue', Impact, sans-serif);
  font-size: 1.6rem;
  letter-spacing: 3px;
  color: white;
  margin: 0;
}

/* ─── Chat Tabs ─────────────────────────────────────────────── */

.chat-tabs {
  display: flex;
  background: var(--color-structure-deepest, #183e4e);
  border-bottom: 2px solid var(--scrim-white-soft);
  flex-shrink: 0;
}

.chat-tab {
  flex: 1;
  padding: 10px 0;
  border: none;
  background: none;
  color: rgba(255, 255, 255, 0.5);
  font-family: var(--font-display, 'Bebas Neue', Impact, sans-serif);
  font-size: 0.9rem;
  letter-spacing: 2px;
  cursor: pointer;
  position: relative;
  min-height: 44px;
}

.chat-tab:disabled {
  opacity: 0.3;
  cursor: not-allowed;
}

.chat-tab.active {
  color: white;
}

.chat-tab.active::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 20%;
  right: 20%;
  height: 3px;
  background: var(--color-accent-aqua, #44a1bb);
  border-radius: 2px;
}

/* ─── Chat Pinned Message ───────────────────────────────────── */

.chat-pinned {
  background: var(--color-highlight-cream, #fff1d0);
  border-left: 4px solid var(--color-action-primary, #f07c0f);
  margin: 8px 12px;
  padding: 8px 12px;
  border-radius: 0 6px 6px 0;
  font-size: 12px;
  flex-shrink: 0;
}

.chat-pinned-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 4px;
}

.chat-pinned-label {
  font-family: var(--font-display, 'Bebas Neue', Impact, sans-serif);
  font-size: 0.7rem;
  letter-spacing: 2px;
  color: var(--color-action-primary, #f07c0f);
}

.chat-pinned-close {
  border: none;
  background: none;
  color: var(--color-structure-medium, #64aece);
  cursor: pointer;
  padding: 4px;
  min-height: 28px;
  min-width: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.chat-pinned-text {
  color: var(--color-structure-deepest, #183e4e);
  line-height: 1.4;
}

/* ─── Chat Messages Container ───────────────────────────────── */

.chat-messages {
  flex: 1;
  overflow-y: auto;
  padding: 8px 0;
  -webkit-overflow-scrolling: touch;
}

/* ─── Chat Message Bubbles ──────────────────────────────────── */

.chat-msg {
  padding: 8px 12px;
  margin: 3px 12px;
  border-radius: 12px;
  font-size: 13px;
  line-height: 1.45;
  max-width: 80%;
  position: relative;
  cursor: pointer;
}

.chat-msg--own {
  background: var(--color-structure-primary, #317b9b);
  color: white;
  margin-left: auto;
  border-bottom-right-radius: 2px;
}

.chat-msg--other {
  background: var(--bg-card);
  color: var(--color-structure-deepest, #183e4e);
  border: 1px solid var(--color-structure-lightest, #d8ebf3);
  border-bottom-left-radius: 2px;
  border-left: 3px solid var(--color-accent-aqua, #44a1bb);
}

.chat-msg--system {
  background: var(--color-structure-lightest, #d8ebf3);
  color: var(--color-structure-deep, #255c74);
  margin-left: auto;
  margin-right: auto;
  max-width: 90%;
  text-align: center;
  font-size: 12px;
  border-radius: 6px;
  border: 1px dashed var(--color-structure-lighter, #b1d7e7);
  cursor: default;
}

.chat-msg-text {
  word-wrap: break-word;
  overflow-wrap: break-word;
}

.chat-msg-pin {
  font-size: 10px;
  margin-left: 4px;
}

.chat-msg-sender {
  font-family: var(--font-display, 'Bebas Neue', Impact, sans-serif);
  font-size: 0.7rem;
  letter-spacing: 1.5px;
  opacity: 0.7;
  padding: 6px 16px 2px;
  color: var(--text-secondary);
}

.chat-msg-sender--right {
  text-align: right;
}

.chat-msg-time {
  font-family: var(--font-mono, monospace);
  font-size: 10px;
  color: var(--color-structure-medium, #64aece);
  text-align: right;
  padding: 1px 16px 2px;
}

.chat-msg-time--left {
  text-align: left;
}

/* ─── Chat Context Menu ─────────────────────────────────────── */

.chat-context-menu {
  position: relative;
  background: var(--bg-card);
  border: 1px solid var(--border-default);
  border-radius: 8px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
  margin: 4px 12px;
  overflow: hidden;
  max-width: 50%;
  z-index: 5;
}

.chat-context-menu--right {
  margin-left: auto;
}

.chat-context-btn {
  display: block;
  width: 100%;
  padding: 10px 16px;
  border: none;
  background: none;
  text-align: left;
  font-size: 13px;
  color: var(--text-primary);
  cursor: pointer;
  min-height: 44px;
}

.chat-context-btn:hover, .chat-context-btn:active {
  background: var(--bg-page);
}

.chat-context-btn + .chat-context-btn {
  border-top: 1px solid var(--border-default);
}

/* ─── Chat Input Bar ────────────────────────────────────────── */

.chat-input-bar {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 10px 12px;
  padding-bottom: max(10px, env(safe-area-inset-bottom, 10px));
  background: var(--bg-card);
  border-top: 2px solid var(--color-structure-lightest, #d8ebf3);
  display: flex;
  gap: 8px;
  align-items: center;
  z-index: 10;
}

@media (min-width: 1024px) {
  .chat-input-bar {
    left: 280px;
  }
}

.chat-input {
  flex: 1;
  height: 44px;
  border: 2px solid var(--color-structure-lighter, #b1d7e7);
  border-radius: 22px;
  padding: 0 16px;
  font-size: 14px;
  background: var(--bg-card);
  outline: none;
  color: var(--text-primary);
}

.chat-input:focus {
  border-color: var(--color-accent-aqua, #44a1bb);
}

.chat-input:disabled {
  opacity: 0.5;
}

.chat-send-btn {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: none;
  background: var(--color-action-primary, #f07c0f);
  color: white;
  font-size: 18px;
  font-weight: 700;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.chat-send-btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.chat-send-btn:active:not(:disabled) {
  background: var(--color-action-light, #f3963f);
}

.chat-input-spacer {
  height: 72px;
  flex-shrink: 0;
}

/* ─── Chat Loading ──────────────────────────────────────────── */

.chat-loading {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 12px;
  color: var(--text-secondary);
}

.chat-loading-spinner {
  width: 32px;
  height: 32px;
  border: 3px solid var(--color-structure-lightest, #d8ebf3);
  border-top-color: var(--color-accent-aqua, #44a1bb);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}


/* ═══════════════════════════════════════════════════════════════
   Phase 4 Sprint 2: DM, Trade Threads
   ═══════════════════════════════════════════════════════════════ */

/* ─── Chat Tab Badge ───────────────────────────────────────────── */

.chat-tab-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 18px;
  height: 18px;
  padding: 0 5px;
  margin-left: 6px;
  font-family: var(--font-mono, 'JetBrains Mono', monospace);
  font-size: 10px;
  font-weight: 700;
  line-height: 1;
  color: #fff;
  background: var(--color-danger-primary, #cf3e30);
  border-radius: 9px;
}

/* ─── DM Conversation List ─────────────────────────────────────── */

.dm-list {
  padding: 8px 0;
}

.dm-new-btn {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 8px 16px 12px;
  padding: 10px 16px;
  background: var(--color-structure-primary, #1a3a4a);
  color: #fff;
  border: none;
  border-radius: 10px;
  font-family: var(--font-primary, 'Inter', sans-serif);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  min-height: 44px;
}

.dm-new-btn:active {
  opacity: 0.8;
}

.dm-list-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  cursor: pointer;
  border-bottom: 1px solid var(--color-structure-lightest, #d8ebf3);
  min-height: 64px;
}

.dm-list-item:active {
  background: var(--color-structure-lightest, #d8ebf3);
}

.dm-list-item--unread {
  background: rgba(68, 161, 187, 0.05);
}

.dm-list-item--unread .dm-name {
  font-weight: 700;
}

.dm-list-item--unread .dm-preview {
  color: var(--text-primary, #0e1e28);
  font-weight: 500;
}

.dm-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-family: var(--font-display, 'Bebas Neue', sans-serif);
  font-size: 18px;
  font-weight: 400;
  letter-spacing: 0.5px;
  flex-shrink: 0;
}

.dm-info {
  flex: 1;
  min-width: 0;
}

.dm-name {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-primary, #0e1e28);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.dm-preview {
  font-size: 12px;
  color: var(--text-secondary, #5a7a8a);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  margin-top: 2px;
}

.dm-meta {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 4px;
  flex-shrink: 0;
}

.dm-time {
  font-size: 11px;
  color: var(--text-secondary, #5a7a8a);
  font-family: var(--font-mono, 'JetBrains Mono', monospace);
}

.dm-unread-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 20px;
  height: 20px;
  padding: 0 6px;
  font-family: var(--font-mono, 'JetBrains Mono', monospace);
  font-size: 11px;
  font-weight: 700;
  color: #fff;
  background: var(--color-accent-aqua, #44a1bb);
  border-radius: 10px;
}

.dm-empty {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 64px 24px;
  color: var(--text-secondary, #5a7a8a);
  text-align: center;
}

.dm-empty svg {
  opacity: 0.3;
  margin-bottom: 12px;
}

.dm-empty p {
  font-size: 14px;
  margin: 0;
}

.dm-empty-sub {
  font-size: 12px !important;
  margin-top: 4px !important;
  opacity: 0.7;
}

/* ─── DM Thread ────────────────────────────────────────────────── */

.dm-thread-empty {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 48px 24px;
  color: var(--text-secondary, #5a7a8a);
  font-size: 13px;
}

/* ─── Owner Picker Modal ───────────────────────────────────────── */

.dm-picker-overlay {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: flex;
  align-items: flex-end;
  justify-content: center;
  background: var(--scrim-black-overlay);
}

.dm-picker {
  width: 100%;
  max-width: 500px;
  max-height: 70vh;
  background: var(--color-structure-deepest);
  border-radius: 16px 16px 0 0;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.dm-picker-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  border-bottom: 1px solid var(--color-structure-deepest, #183e4e);
}

.dm-picker-header h2 {
  font-family: var(--font-display, 'Bebas Neue', sans-serif);
  font-size: 18px;
  letter-spacing: 1px;
  color: var(--text-primary);
  margin: 0;
}

.dm-picker-close {
  background: none;
  border: none;
  color: var(--text-secondary, #5a7a8a);
  cursor: pointer;
  padding: 4px;
}

.dm-picker-list {
  overflow-y: auto;
  padding: 8px 0;
  -webkit-overflow-scrolling: touch;
}

.dm-picker-item {
  display: flex;
  align-items: center;
  gap: 12px;
  width: 100%;
  padding: 12px 20px;
  background: none;
  border: none;
  cursor: pointer;
  text-align: left;
  min-height: 52px;
  color: var(--text-primary);
}

.dm-picker-item:active {
  background: var(--color-structure-deepest, #183e4e);
}

.dm-picker-name {
  font-size: 14px;
  font-weight: 600;
}

/* ─── Trade Threads List (Chat page) ───────────────────────────── */

.thread-list {
  padding: 8px 0;
}

.thread-list-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 16px;
  cursor: pointer;
  border-bottom: 1px solid var(--color-structure-lightest, #d8ebf3);
  min-height: 60px;
}

.thread-list-item:active {
  background: var(--color-structure-lightest, #d8ebf3);
}

.thread-icon {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(68, 161, 187, 0.15);
  font-size: 16px;
  flex-shrink: 0;
}

.thread-info {
  flex: 1;
  min-width: 0;
}

.thread-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-primary, #0e1e28);
}

.thread-status {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 3px;
}

.thread-status-badge {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  padding: 1px 6px;
  border-radius: 4px;
}

.thread-status--proposed {
  background: rgba(68, 161, 187, 0.15);
  color: var(--color-accent-aqua, #44a1bb);
}

.thread-status--countered {
  background: rgba(240, 124, 15, 0.15);
  color: var(--color-action-primary, #f07c0f);
}

.thread-status--accepted {
  background: rgba(46, 204, 113, 0.15);
  color: #2ECC71;
}

.thread-msg-count {
  font-size: 11px;
  color: var(--text-secondary, #5a7a8a);
}

.thread-chevron {
  flex-shrink: 0;
  color: var(--text-secondary, #5a7a8a);
  opacity: 0.5;
}

/* ─── Trade Thread Chat Button (TradeRoom cards) ───────────────── */

.trade-thread-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  min-height: 32px;
  background: rgba(68, 161, 187, 0.1);
  color: var(--color-accent-aqua, #44a1bb);
  border: 1px solid rgba(68, 161, 187, 0.2);
  border-radius: 8px;
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
  margin-left: auto;
}

.trade-thread-btn:active {
  background: rgba(68, 161, 187, 0.2);
}

/* ─── Trade Thread Slide-Up Panel ──────────────────────────────── */

.trade-thread-overlay {
  position: fixed;
  inset: 0;
  z-index: 90;
  /* Safe-area insets prevent content clipping on notched devices */
  padding: env(safe-area-inset-top, 0px) env(safe-area-inset-right, 0px)
           env(safe-area-inset-bottom, 0px) env(safe-area-inset-left, 0px);
}

.trade-thread-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.4);
}

.trade-thread-panel {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 75vh;
  max-height: 600px;
  background: var(--color-structure-deepest);
  border-radius: 16px 16px 0 0;
  display: flex;
  flex-direction: column;
  z-index: 1;
  overflow: hidden;
}

.trade-thread-header {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 16px;
  border-bottom: 1px solid var(--color-structure-deepest, #183e4e);
  flex-shrink: 0;
}

.trade-thread-close {
  background: none;
  border: none;
  color: var(--text-secondary, #5a7a8a);
  cursor: pointer;
  padding: 4px;
}

.trade-thread-title {
  font-family: var(--font-display, 'Bebas Neue', sans-serif);
  font-size: 16px;
  letter-spacing: 0.5px;
  color: var(--text-primary);
}

.trade-thread-summary {
  padding: 10px 16px;
  background: var(--color-structure-deepest, #183e4e);
  border-bottom: 1px solid var(--color-structure-primary, #1a3a4a);
  flex-shrink: 0;
}

.trade-thread-messages {
  flex: 1;
  overflow-y: auto;
  padding: 12px 16px;
  -webkit-overflow-scrolling: touch;
}

.trade-thread-loading,
.trade-thread-empty {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 32px 16px;
}

.trade-thread-msg {
  margin-bottom: 8px;
  max-width: 80%;
}

.trade-thread-msg--system {
  max-width: 100%;
  text-align: center;
  font-size: 11px;
  color: var(--text-secondary, #5a7a8a);
  padding: 6px 12px;
  background: rgba(68, 161, 187, 0.08);
  border-radius: 8px;
  margin: 8px auto;
}

.trade-thread-msg--own {
  margin-left: auto;
}

.trade-thread-msg--own .trade-thread-msg-text {
  background: var(--color-accent-aqua, #44a1bb);
  color: #fff;
  border-radius: 12px 12px 4px 12px;
}

.trade-thread-msg--other .trade-thread-msg-text {
  background: var(--color-structure-deepest, #183e4e);
  color: var(--text-primary);
  border-radius: 12px 12px 12px 4px;
}

.trade-thread-msg-sender {
  font-size: 11px;
  font-weight: 600;
  color: var(--text-secondary, #5a7a8a);
  margin-bottom: 2px;
  padding-left: 4px;
}

.trade-thread-msg-text {
  padding: 8px 12px;
  font-size: 13px;
  line-height: 1.4;
  word-break: break-word;
}

.trade-thread-msg-time {
  font-size: 10px;
  color: var(--text-secondary, #5a7a8a);
  margin-top: 2px;
  padding: 0 4px;
}

.trade-thread-msg--own .trade-thread-msg-time {
  text-align: right;
}

/* ─── Trade Thread Input ───────────────────────────────────────── */

.trade-thread-input {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 16px;
  padding-bottom: max(10px, env(safe-area-inset-bottom, 10px));
  border-top: 1px solid var(--color-structure-deepest, #183e4e);
  background: var(--color-structure-deepest);
  flex-shrink: 0;
}

.trade-thread-input-field {
  flex: 1;
  padding: 10px 14px;
  background: var(--color-structure-deepest, #183e4e);
  border: 1px solid var(--color-structure-primary, #1a3a4a);
  border-radius: 20px;
  color: var(--text-primary);
  font-size: 14px;
  font-family: var(--font-primary, 'Inter', sans-serif);
  outline: none;
  min-height: 40px;
}

.trade-thread-input-field:focus {
  border-color: var(--color-accent-aqua, #44a1bb);
}

.trade-thread-input-field::placeholder {
  color: var(--text-secondary, #5a7a8a);
}

.trade-thread-send-btn {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: none;
  background: var(--color-action-primary, #f07c0f);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  flex-shrink: 0;
}

.trade-thread-send-btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.trade-thread-send-btn:active:not(:disabled) {
  background: var(--color-action-light, #f3963f);
}

/* ─── Desktop: Trade Thread Panel ──────────────────────────────── */

@media (min-width: 768px) {
  .trade-thread-panel {
    max-width: 500px;
    left: auto;
    right: 0;
    height: 80vh;
  }

  .dm-picker {
    border-radius: 16px;
    margin-bottom: 10vh;
  }
}