/* ═══════════════════════════════════════════════════════════════
   SustBridge Shell — v1.0
   Cockpit layout: icon rail + topbar + tab bar + content + chat.
   Requires: design-tokens.css loaded first.
   Import: <link rel="stylesheet" href="/styles/shell.css">
   ═══════════════════════════════════════════════════════════════ */

/* ─── Shell grid ───
   ┌──────────┬──────────────────────────────────────┐
   │          │  TOPBAR (44px)                        │
   │  ICON    │──────────────────────────────────────│
   │  RAIL    │  TAB BAR (38px)                      │
   │  (56px)  │──────────────────────────────────────│
   │          │  CONTENT (flex-1, scrollable)        │
   │          │──────────────────────────────────────│
   │          │  CHAT PANEL (variable height)        │
   └──────────┴──────────────────────────────────────┘  */

.sb-shell {
  display: flex;
  height: 100vh;
  overflow: hidden;
  background: var(--base-bg);
}

/* ═══════════════════════════════════════
   Icon Rail (left, 56px)
   ═══════════════════════════════════════ */

.sb-rail {
  width: var(--rail-width);
  flex-shrink: 0;
  background: var(--base-alt);
  border-right: 1px solid var(--contrast-10);
  display: flex;
  flex-direction: column;
  z-index: var(--z-rail);
}

/* Hamburger / logo at top */
.sb-rail-header {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 8px 0;
  border-bottom: 1px solid var(--contrast-10);
  flex-shrink: 0;
  gap: 2px;
}

.sb-rail-hamburger {
  width: 36px;
  height: 36px;
  border: none;
  background: transparent;
  border-radius: var(--radius-s);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--contrast-60);
  transition: background var(--duration-fast) var(--ease-default);
}
.sb-rail-hamburger:hover {
  background: var(--contrast-5);
  color: var(--contrast-100);
}

/* Workflow stage icons */
.sb-rail-stages {
  flex: 1;
  display: flex;
  flex-direction: column;
  padding: 8px 0;
  gap: 2px;
}

.sb-rail-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 10px 0;
  cursor: pointer;
  position: relative;
  border: none;
  background: transparent;
  transition: background var(--duration-fast) var(--ease-default);
}
.sb-rail-item:hover {
  background: var(--contrast-5);
}

/* Active indicator — left green bar */
.sb-rail-item.active::before {
  content: '';
  position: absolute;
  left: 0;
  top: 8px;
  bottom: 8px;
  width: 3px;
  border-radius: 0 2px 2px 0;
  background: var(--primary);
}

/* Icon */
.sb-rail-item .sb-rail-icon {
  width: 20px;
  height: 20px;
  color: var(--text-muted);
  transition: color var(--duration-fast);
}
.sb-rail-item.active .sb-rail-icon {
  color: var(--primary);
}

/* Label */
.sb-rail-item .sb-rail-label {
  font-size: 9px;
  font-weight: 500;
  color: var(--text-muted);
  margin-top: 3px;
  letter-spacing: 0.02em;
}
.sb-rail-item.active .sb-rail-label {
  color: var(--primary);
  font-weight: 600;
}

/* Locked stage (junior "Build") */
.sb-rail-item.locked {
  cursor: default;
}
.sb-rail-item.locked .sb-rail-icon {
  opacity: 0.3;
}
.sb-rail-item.locked .sb-rail-label {
  color: var(--text-dim);
}
.sb-rail-item.locked::after {
  content: '';
  position: absolute;
  inset: 6px 10px;
  border: 1.5px dashed var(--contrast-20);
  border-radius: var(--radius-s);
  pointer-events: none;
}

/* Bottom section: DMs, user avatar */
.sb-rail-footer {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 8px 0 12px;
  gap: 4px;
  border-top: 1px solid var(--contrast-10);
  flex-shrink: 0;
}

.sb-rail-dm {
  position: relative;
  width: 36px;
  height: 36px;
  border: none;
  background: transparent;
  border-radius: var(--radius-s);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--contrast-60);
  transition: background var(--duration-fast);
}
.sb-rail-dm:hover {
  background: var(--contrast-5);
  color: var(--contrast-100);
}

/* Unread badge on DM icon */
.sb-rail-dm .sb-unread-dot {
  position: absolute;
  top: 6px;
  right: 6px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--error);
  border: 2px solid var(--base-alt);
  display: none;
}
.sb-rail-dm.has-unread .sb-unread-dot {
  display: block;
}

.sb-rail-feedback {
  width: 36px;
  height: 36px;
  border: none;
  background: transparent;
  border-radius: var(--radius-s);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--contrast-60);
  transition: background var(--duration-fast), color var(--duration-fast);
}
.sb-rail-feedback:hover {
  background: var(--primary-10);
  color: var(--primary);
}
.sb-rail-feedback:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

.sb-rail-avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--primary-10);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: box-shadow var(--duration-fast);
}
.sb-rail-avatar:hover {
  box-shadow: 0 0 0 2px var(--primary-50);
}

/* ═══════════════════════════════════════
   Main area (right of rail)
   ═══════════════════════════════════════ */

.sb-main {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-width: 0;
  position: relative;  /* for overlays */
}

/* ═══════════════════════════════════════
   Topbar (44px)
   ═══════════════════════════════════════ */

.sb-topbar {
  height: var(--topbar-height);
  border-bottom: 1px solid var(--contrast-10);
  display: flex;
  align-items: center;
  padding: 0 16px;
  flex-shrink: 0;
  z-index: var(--z-topbar);
  background: var(--base-bg);
}

/* Enterprise-ready: context slot for future workspace switcher */
.sb-topbar-context {
  display: none;  /* hidden until Phase I activates workspace switching */
  align-items: center;
  gap: 8px;
  margin-right: 16px;
  padding-right: 16px;
  border-right: 1px solid var(--contrast-10);
}

/* Workflow stepper (left side) */
.sb-stepper {
  display: flex;
  align-items: center;
  gap: 2px;
  flex: 1;
}

.sb-step {
  display: flex;
  align-items: center;
  gap: 5px;
  cursor: pointer;
  padding: 4px 6px;
  border-radius: var(--radius-s);
  border: none;
  background: transparent;
  transition: background var(--duration-fast);
}
.sb-step:hover {
  background: var(--contrast-5);
}

.sb-step-num {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 10px;
  font-weight: 600;
  flex-shrink: 0;
}
.sb-step.active .sb-step-num {
  background: var(--primary);
  color: #fff;
}
.sb-step.inactive .sb-step-num {
  border: 1.5px solid var(--contrast-20);
  color: var(--text-dim);
}
.sb-step.locked .sb-step-num {
  border: 1.5px dashed var(--contrast-20);
  color: var(--text-dim);
}

.sb-step-label {
  font-size: 12px;
  font-weight: 500;
}
.sb-step.active .sb-step-label {
  color: var(--primary);
  font-weight: 600;
}
.sb-step.inactive .sb-step-label {
  color: var(--text-dim);
}
.sb-step.locked .sb-step-label {
  color: var(--text-dim);
}

/* Chevron separator between steps */
.sb-step-sep {
  font-size: 10px;
  color: var(--contrast-20);
  margin: 0 1px;
  user-select: none;
}

/* XP + credits (right side) */
.sb-topbar-right {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

.sb-level-badge {
  font-size: 11px;
  font-weight: 600;
  padding: 2px 8px;
  border-radius: 100px;
}
.sb-level-badge.consultant {
  background: var(--primary-10);
  color: var(--primary);
}
.sb-level-badge.company {
  background: var(--company-10);
  color: var(--company);
}

.sb-xp-bar {
  display: flex;
  align-items: center;
  gap: 5px;
}
.sb-xp-track {
  width: 70px;
  height: 5px;
  background: var(--contrast-10);
  border-radius: 3px;
  overflow: hidden;
}
.sb-xp-fill {
  height: 100%;
  background: var(--primary);
  border-radius: 3px;
  transition: width var(--duration-normal) var(--ease-default);
}
.sb-xp-text {
  font-size: 11px;
  color: var(--text-muted);
  white-space: nowrap;
}

.sb-credits {
  font-size: 11px;
  color: var(--text-muted);
  padding-left: 10px;
  border-left: 1px solid var(--contrast-10);
  white-space: nowrap;
}

/* ═══════════════════════════════════════
   Tab bar
   ═══════════════════════════════════════ */

.sb-tabbar {
  display: flex;
  border-bottom: 1px solid var(--contrast-10);
  padding: 0 16px;
  flex-shrink: 0;
  background: var(--base-bg);
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

/* Hide scrollbar for tab overflow */
.sb-tabbar::-webkit-scrollbar { display: none; }
.sb-tabbar { -ms-overflow-style: none; scrollbar-width: none; }

.sb-tab {
  padding: 9px 16px;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-muted);
  cursor: pointer;
  border: none;
  background: transparent;
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
  white-space: nowrap;
  transition: color var(--duration-fast), border-color var(--duration-fast);
}
.sb-tab:hover:not(.active) {
  color: var(--contrast-80);
}
.sb-tab.active {
  color: var(--primary);
  border-bottom-color: var(--primary);
}

/* ═══════════════════════════════════════
   Content area
   ═══════════════════════════════════════ */

.sb-content {
  flex: 1;
  overflow-y: auto;
  padding: 20px;
  min-height: 0;
}

/* ═══════════════════════════════════════
   Chat panel (bottom)
   Three states: collapsed, expanded, full-focus
   ═══════════════════════════════════════ */

.sb-chat {
  border-top: 1px solid var(--contrast-10);
  flex-shrink: 0;
  background: var(--base-bg);
  z-index: var(--z-chat);
  transition: height var(--duration-normal) var(--ease-default);
}

/* State: collapsed — header + input, messages hidden */
.sb-chat.collapsed {
  /* height set by content — header + input row */
}
.sb-chat.collapsed .sb-chat-messages {
  display: none;
}

/* State: expanded — header + messages + input */
.sb-chat.expanded .sb-chat-messages {
  display: flex;
  height: var(--chat-expanded-height);
}

/* State: full focus — takes over main content */
.sb-chat.full-focus {
  position: absolute;
  inset: 0;
  left: 0;
  z-index: var(--z-chat);
  display: flex;
  flex-direction: column;
  border-top: none;
}
.sb-chat.full-focus .sb-chat-messages {
  display: flex;
  flex: 1;
  height: auto;
}

/* Chat header */
.sb-chat-header {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  cursor: pointer;
  user-select: none;
}
.sb-chat-header:hover {
  background: var(--contrast-5);
}

.sb-chat-title {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-heading);
  flex: 1;
}

.sb-chat-actions {
  display: flex;
  gap: 12px;
}

.sb-chat-action {
  font-size: 12px;
  color: var(--primary);
  cursor: pointer;
  border: none;
  background: transparent;
  font-weight: 500;
  padding: 2px 4px;
}
.sb-chat-action:hover {
  text-decoration: underline;
}

/* Chevron */
.sb-chat-chevron {
  width: 16px;
  height: 16px;
  color: var(--text-muted);
  transition: transform var(--duration-fast);
  flex-shrink: 0;
}
.sb-chat.collapsed .sb-chat-chevron {
  transform: rotate(0deg);    /* ▲ points up = expand */
}
.sb-chat.expanded .sb-chat-chevron {
  transform: rotate(180deg);  /* ▼ points down = collapse */
}

/* Chat messages */
.sb-chat-messages {
  display: none;
  flex-direction: column;
  overflow-y: auto;
  padding: 8px 14px;
  border-top: 1px solid var(--contrast-5);
}

/* Chat input */
.sb-chat-input-row {
  display: flex;
  gap: 8px;
  padding: 6px 14px 8px;
  align-items: flex-end;
}

.sb-chat-input {
  flex: 1;
  padding: 8px 12px;
  border: 1px solid var(--contrast-20);
  border-radius: var(--radius-m);
  font-family: var(--font-family);
  font-size: 14px;
  resize: none;
  min-height: 36px;
  max-height: 120px;
  background: var(--base-bg);
  color: var(--text-body);
  transition: border-color var(--duration-fast);
}
.sb-chat-input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 2px var(--primary-10);
}

.sb-chat-send {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-m);
  border: none;
  background: var(--primary);
  color: #fff;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: background var(--duration-fast);
}
.sb-chat-send:hover {
  background: var(--primary-dark);
}
.sb-chat-send:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

/* ═══════════════════════════════════════
   Overlay system
   Both overlays float OVER content, never push.
   ═══════════════════════════════════════ */

/* Backdrop */
.sb-overlay-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.12);
  z-index: var(--z-backdrop);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--duration-normal) var(--ease-default);
}
.sb-overlay-backdrop.visible {
  opacity: 1;
  pointer-events: auto;
}

/* Nav overlay (left) */
.sb-nav-overlay {
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  width: 260px;
  background: var(--base-alt);
  border-right: 1px solid var(--contrast-10);
  z-index: var(--z-overlay);
  transform: translateX(-100%);
  transition: transform var(--duration-normal) var(--ease-default);
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-l);
}
.sb-nav-overlay.open {
  transform: translateX(0);
}

.sb-nav-overlay-header {
  padding: 16px;
  border-bottom: 1px solid var(--contrast-10);
  display: flex;
  align-items: center;
  gap: 10px;
}
.sb-nav-overlay-logo {
  height: 28px;
  width: auto;
}

.sb-nav-section {
  padding: 12px 0;
}
.sb-nav-section-title {
  font-size: 10px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  padding: 0 16px 6px;
}

.sb-nav-link {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 16px;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-body);
  cursor: pointer;
  text-decoration: none;
  border: none;
  background: transparent;
  width: 100%;
  text-align: left;
  transition: background var(--duration-fast);
}
.sb-nav-link:hover {
  background: var(--contrast-5);
}
.sb-nav-link.active {
  color: var(--primary);
  background: var(--primary-10);
}

.sb-nav-link-icon {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
}

/* Subscribe CTA in nav */
.sb-nav-cta {
  margin: 12px 16px;
  padding: 12px 14px;
  background: var(--primary-10);
  border-radius: var(--radius-m);
  text-align: center;
}
.sb-nav-cta-title {
  font-size: 13px;
  font-weight: 600;
  color: var(--primary);
}
.sb-nav-cta-sub {
  font-size: 11px;
  color: var(--text-muted);
  margin: 2px 0 8px;
}
.sb-nav-cta-btn {
  font-size: 12px;
  color: var(--primary);
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
}
.sb-nav-cta-btn:hover {
  text-decoration: underline;
}

/* Nav footer — user profile */
.sb-nav-footer {
  margin-top: auto;
  padding: 16px;
  border-top: 1px solid var(--contrast-10);
  display: flex;
  align-items: center;
  gap: 10px;
}

/* DM overlay (right) */
.sb-dm-overlay {
  position: fixed;
  top: 0;
  right: 0;
  bottom: 0;
  width: 320px;
  background: var(--base-bg);
  border-left: 1px solid var(--contrast-10);
  z-index: var(--z-overlay);
  transform: translateX(100%);
  transition: transform var(--duration-normal) var(--ease-default);
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-l);
}
.sb-dm-overlay.open {
  transform: translateX(0);
}

.sb-dm-overlay-header {
  padding: 14px 16px;
  border-bottom: 1px solid var(--contrast-10);
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.sb-dm-overlay-title {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-heading);
}
.sb-dm-close {
  width: 28px;
  height: 28px;
  border: none;
  background: transparent;
  border-radius: var(--radius-s);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
}
.sb-dm-close:hover {
  background: var(--contrast-5);
  color: var(--contrast-100);
}

/* DM thread list */
.sb-dm-threads {
  flex: 1;
  overflow-y: auto;
}

.sb-dm-thread {
  display: flex;
  gap: 10px;
  padding: 12px 16px;
  cursor: pointer;
  border-bottom: 1px solid var(--contrast-5);
  transition: background var(--duration-fast);
}
.sb-dm-thread:hover {
  background: var(--contrast-5);
}
.sb-dm-thread.unread {
  background: var(--primary-10);
  border-left: 2px solid var(--primary);
}

/* Chat history drawer (inside nav overlay or separate) */
.sb-chat-history {
  flex: 1;
  overflow-y: auto;
  padding: 8px 0;
}

/* ═══════════════════════════════════════
   Admin shell variant
   Same rail with admin-specific icons,
   no stepper, no XP bar.
   ═══════════════════════════════════════ */

.sb-shell.admin .sb-stepper,
.sb-shell.admin .sb-xp-bar,
.sb-shell.admin .sb-credits {
  display: none;
}

.sb-shell.admin .sb-topbar-admin-title {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-heading);
  flex: 1;
}

/* ═══════════════════════════════════════
   Responsive: Tablet (≤768px)
   ═══════════════════════════════════════ */

@media (max-width: 768px) {
  .sb-rail {
    display: none;
  }

  .sb-shell {
    flex-direction: column;
  }

  /* Show mobile bottom tab bar */
  .sb-mobile-tabs {
    display: flex;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    height: 56px;
    background: var(--base-bg);
    border-top: 1px solid var(--contrast-10);
    z-index: var(--z-topbar);
    box-shadow: 0 -1px 4px rgba(0, 0, 0, 0.05);
  }

  .sb-mobile-tab {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 2px;
    border: none;
    background: transparent;
    cursor: pointer;
    color: var(--text-muted);
    font-size: 10px;
    font-weight: 500;
    padding: 4px 0;
  }
  .sb-mobile-tab.active {
    color: var(--primary);
  }
  .sb-mobile-tab .sb-mobile-tab-icon {
    width: 20px;
    height: 20px;
  }

  /* Content needs bottom padding for mobile tabs */
  .sb-content {
    padding-bottom: 72px;
  }

  /* Chat full-focus on mobile = full screen overlay */
  .sb-chat.full-focus {
    position: fixed;
    inset: 0;
    z-index: var(--z-overlay);
  }

  /* Stepper: hide labels, show only numbered dots */
  .sb-step-label {
    display: none;
  }

  /* DM overlay full width on mobile */
  .sb-dm-overlay {
    width: 100%;
  }
  .sb-nav-overlay {
    width: 85%;
    max-width: 320px;
  }
}

/* Desktop: hide mobile tabs */
@media (min-width: 769px) {
  .sb-mobile-tabs {
    display: none;
  }
}

/* ═══════════════════════════════════════
   Responsive: Phone (≤480px)
   ═══════════════════════════════════════ */

@media (max-width: 480px) {
  .sb-content {
    padding: 14px;
    padding-bottom: 72px;
  }

  .sb-topbar {
    padding: 0 10px;
  }

  .sb-tabbar {
    padding: 0 10px;
  }

  .sb-tab {
    padding: 8px 12px;
    font-size: 12px;
  }

  /* XP bar text: shorter format */
  .sb-xp-text {
    font-size: 10px;
  }

  .sb-nav-overlay {
    width: 100%;
    max-width: none;
  }
}

/* ─── Shell overrides: hide legacy page elements ─── */
.sb-shell .saved-sidebar,
.sb-shell .topbar-logo,
.sb-shell .sb-sidebar,
.sb-shell #sb-page-content > .sidebar {
  display: none !important;
}

/* Adjust page content when old sidebar is hidden */
.sb-shell .page {
  margin-left: 0 !important;
}

/* Rail logo */
.sb-rail-logo {
  height: 28px;
  width: auto;
  cursor: pointer;
  margin-bottom: 4px;
}

/* Full-focus chat: chevron points down */
.sb-chat.full-focus .sb-chat-chevron {
  transform: rotate(180deg);
}

/* ─── Chat message bubbles ─── */
.sb-chat-msg {
  max-width: 85%;
  padding: 10px 14px;
  border-radius: 12px;
  font-size: 14px;
  line-height: 1.5;
  margin-bottom: 8px;
  word-wrap: break-word;
}
.sb-chat-user {
  background: var(--primary, #2E7D4F);
  color: #fff;
  margin-left: auto;
  border-bottom-right-radius: 4px;
}
.sb-chat-assistant {
  background: var(--contrast-5, #f5f5f5);
  color: var(--text-primary, #1a1a1a);
  margin-right: auto;
  border-bottom-left-radius: 4px;
}
.sb-chat-assistant code {
  background: var(--contrast-10, #e8e8e8);
  padding: 1px 4px;
  border-radius: 3px;
  font-size: 13px;
}
.sb-chat-assistant a {
  color: var(--primary, #2E7D4F);
}
.sb-chat-msg.streaming {
  opacity: 0.85;
}
.sb-chat-msg.error-bubble {
  background: #fef2f2;
  color: #991b1b;
  border: 1px solid #fecaca;
}

/* AI chat — inline panel avatar treatment */
.sb-chat-row {
  display: flex;
  gap: 8px;
  align-items: flex-start;
  margin-bottom: 10px;
}
.sb-chat-row-user {
  justify-content: flex-end;
}
.sb-chat-avatar {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--primary-10);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.sb-chat-avatar img {
  display: block;
}

/* ─── DM thread items ─── */
.sb-dm-thread {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 16px;
  cursor: pointer;
  border-bottom: 1px solid var(--contrast-5, #f0f0f0);
  transition: background var(--duration-fast, 0.15s);
}
.sb-dm-thread:hover {
  background: var(--contrast-5, #f5f5f5);
}
.sb-dm-thread-avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--primary, #2E7D4F);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  font-weight: 600;
  flex-shrink: 0;
}
.sb-dm-thread-info {
  flex: 1;
  min-width: 0;
}
.sb-dm-thread-name {
  font-weight: 600;
  font-size: 13px;
  color: var(--text-primary, #1a1a1a);
}
.sb-dm-thread-preview {
  font-size: 12px;
  color: var(--text-muted, #888);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.sb-dm-thread-unread {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--primary, #2E7D4F);
  flex-shrink: 0;
}

/* Hide old top-bar and nav in engagements.html */
.sb-shell .top-bar {
  display: none !important;
}

/* ═══════════════════════════════════════
   Feedback overlay (rail bulb + nav drawer)
   ═══════════════════════════════════════ */
.sb-feedback-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.30);
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
}
.sb-feedback-card {
  background: var(--base-bg);
  border-radius: var(--radius-l);
  padding: 24px;
  max-width: 420px;
  width: 90%;
  box-shadow: var(--shadow-m);
}
.sb-feedback-title {
  font-size: 16px;
  font-weight: 600;
  color: var(--contrast-100);
  margin-bottom: 4px;
}
.sb-feedback-sub {
  font-size: 13px;
  color: var(--contrast-60);
  margin-bottom: 16px;
}
.sb-feedback-textarea {
  width: 100%;
  border: 1.5px solid var(--contrast-10);
  border-radius: var(--radius-m);
  padding: 10px 12px;
  font: 400 14px/1.5 Inter, sans-serif;
  color: var(--contrast-100);
  resize: none;
  outline: none;
  margin-bottom: 12px;
  box-sizing: border-box;
}
.sb-feedback-textarea:focus {
  border-color: var(--primary);
}
.sb-feedback-actions {
  display: flex;
  gap: 8px;
  justify-content: flex-end;
}
.sb-feedback-cancel {
  padding: 8px 16px;
  border: 1px solid var(--contrast-10);
  border-radius: var(--radius-m);
  background: none;
  font: 500 13px/1 Inter, sans-serif;
  color: var(--contrast-100);
  cursor: pointer;
}
.sb-feedback-send {
  padding: 8px 16px;
  border: none;
  border-radius: var(--radius-m);
  background: var(--primary);
  color: var(--primary-contrast);
  font: 600 13px/1 Inter, sans-serif;
  cursor: pointer;
}
.sb-feedback-send:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}
.sb-feedback-thanks {
  font-size: 14px;
  color: var(--contrast-100);
  text-align: center;
  padding: 8px 0;
}