/* ============================================
   Dashboard / Settings / Notifications / Messages
   ============================================ */

.app-shell {
  display: grid;
  grid-template-columns: 240px 1fr;
  min-height: calc(100vh - var(--header-h));
}

@media (max-width: 1024px) {
  .app-shell { grid-template-columns: 1fr; }
}

/* SIDEBAR */
.app-sidebar {
  border-right: 1px solid var(--border);
  background: var(--bg-elevated);
  padding: 28px 16px;
  position: sticky;
  top: var(--header-h);
  height: calc(100vh - var(--header-h));
  overflow-y: auto;
}

@media (max-width: 1024px) {
  .app-sidebar { display: none; }
}

.app-user {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px;
  border-radius: var(--radius);
  background: var(--bg-subtle);
  margin-bottom: 24px;
}

.app-user > div:nth-child(2) {
  display: flex;
  flex-direction: column;
}

.app-user strong {
  font-size: 14px;
  font-weight: 700;
}

.app-user span {
  font-size: 12px;
  color: var(--text-muted);
  font-family: var(--font-mono);
}

.nav-section {
  margin-bottom: 20px;
}

.nav-section-h {
  font-size: 11px;
  font-family: var(--font-mono);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--text-muted);
  font-weight: 500;
  margin-bottom: 8px;
  padding: 0 12px;
}

.app-nav-link {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 9px 12px;
  border-radius: var(--radius);
  color: var(--text-secondary);
  font-size: 14px;
  font-weight: 500;
  transition: background-color var(--t-fast), color var(--t-fast);
}

.app-nav-link:hover {
  background: var(--bg-subtle);
  color: var(--text-primary);
}

.app-nav-link.is-active {
  background: var(--text-primary);
  color: var(--bg);
}

.app-nav-link .icon {
  width: 18px;
  height: 18px;
}

.app-nav-link .badge {
  margin-left: auto;
  background: var(--accent);
  color: #fff;
  font-size: 10px;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: var(--radius-full);
  font-family: var(--font-mono);
}

.app-nav-link.is-active .badge {
  background: var(--bg);
  color: var(--text-primary);
}

/* MAIN */
.app-main {
  padding: 32px 40px 80px;
  min-width: 0;
}

@media (max-width: 768px) {
  .app-main { padding: 24px 20px 64px; }
}

.app-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 24px;
  margin-bottom: 28px;
  flex-wrap: wrap;
}

.app-head h1 {
  font-size: 36px;
  font-weight: 800;
  letter-spacing: -0.025em;
  line-height: 1;
}

.app-head .lead {
  font-size: 14px;
  margin-top: 8px;
}

.app-head-actions {
  display: flex;
  gap: 8px;
  align-items: center;
}

/* DASHBOARD STATS */
.kpi-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-bottom: 32px;
}

@media (max-width: 768px) {
  .kpi-grid { grid-template-columns: repeat(2, 1fr); }
}

.kpi-card {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 22px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  position: relative;
  overflow: hidden;
}

.kpi-card::after {
  content: "";
  position: absolute;
  bottom: -40px;
  right: -40px;
  width: 120px;
  height: 120px;
  background: radial-gradient(circle, var(--accent), transparent 70%);
  opacity: 0.08;
  pointer-events: none;
}

.kpi-label {
  font-size: 11px;
  font-family: var(--font-mono);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.kpi-value {
  font-size: 32px;
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1;
  font-feature-settings: "tnum";
}

.kpi-trend {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 12px;
  color: var(--success);
  font-family: var(--font-mono);
  font-weight: 500;
}

.kpi-trend.is-down { color: var(--accent); }

/* Row layout */
.dash-row {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 20px;
  margin-bottom: 20px;
}

@media (max-width: 1024px) {
  .dash-row { grid-template-columns: 1fr; }
}

/* Generic Card */
.dash-card {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px;
}

.dash-card-h {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}

.dash-card-h h3 {
  font-size: 16px;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.dash-card-h a {
  font-size: 13px;
  color: var(--text-secondary);
}

.dash-card-h a:hover { color: var(--accent); }

/* Activity feed */
.feed-list {
  display: flex;
  flex-direction: column;
}

.feed-item {
  display: flex;
  gap: 12px;
  padding: 14px 0;
  border-bottom: 1px solid var(--border);
}

.feed-item:last-child { border-bottom: 0; }

.feed-icon {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  flex-shrink: 0;
  background: var(--bg-subtle);
}

.feed-icon svg { width: 16px; height: 16px; }

.feed-text {
  flex: 1;
  font-size: 14px;
  line-height: 1.55;
}

.feed-text strong { font-weight: 700; }

.feed-time {
  font-size: 11px;
  font-family: var(--font-mono);
  color: var(--text-muted);
  letter-spacing: 0.04em;
  margin-top: 4px;
  display: block;
}

/* Quick links */
.quick-actions {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 8px;
}

.quick-action {
  padding: 14px;
  background: var(--bg-subtle);
  border-radius: var(--radius);
  display: flex;
  flex-direction: column;
  gap: 4px;
  transition: transform var(--t-fast);
}

.quick-action:hover { transform: translateY(-2px); }

.quick-action svg {
  width: 24px;
  height: 24px;
  color: var(--accent);
  margin-bottom: 4px;
}

.quick-action strong {
  font-size: 13px;
  font-weight: 600;
}

.quick-action span {
  font-size: 11px;
  color: var(--text-muted);
}

/* Settings tabs */
.settings-layout {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 32px;
  align-items: flex-start;
}

@media (max-width: 768px) {
  .settings-layout { grid-template-columns: 1fr; }
}

.settings-nav {
  display: flex;
  flex-direction: column;
  gap: 2px;
  position: sticky;
  top: calc(var(--header-h) + 24px);
}

.settings-nav-link {
  padding: 10px 14px;
  border-radius: var(--radius);
  font-size: 14px;
  font-weight: 500;
  color: var(--text-secondary);
  transition: all var(--t-fast);
}

.settings-nav-link:hover {
  background: var(--bg-subtle);
  color: var(--text-primary);
}

.settings-nav-link.is-active {
  background: var(--bg-subtle);
  color: var(--text-primary);
  font-weight: 700;
}

.settings-block {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px;
  margin-bottom: 16px;
}

.settings-block h2 {
  font-size: 20px;
  font-weight: 700;
  letter-spacing: -0.015em;
  margin-bottom: 4px;
}

.settings-block .lead {
  font-size: 14px;
  margin-bottom: 24px;
}

.form-row {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 20px;
  padding: 20px 0;
  border-top: 1px solid var(--border);
  align-items: flex-start;
}

.form-row:first-of-type { border-top: 0; padding-top: 0; }

.form-row > div:first-child {
  font-size: 14px;
  font-weight: 600;
}

.form-row > div:first-child small {
  display: block;
  font-weight: 400;
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 2px;
}

@media (max-width: 768px) {
  .form-row { grid-template-columns: 1fr; gap: 8px; }
}

.toggle {
  position: relative;
  width: 40px;
  height: 22px;
  background: var(--bg-subtle);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: all var(--t-fast);
}

.toggle::after {
  content: "";
  position: absolute;
  top: 2px;
  left: 2px;
  width: 16px;
  height: 16px;
  background: var(--bg-elevated);
  border-radius: 50%;
  transition: transform var(--t-fast);
  box-shadow: var(--shadow-sm);
}

.toggle.is-on {
  background: var(--text-primary);
  border-color: var(--text-primary);
}

.toggle.is-on::after { transform: translateX(18px); background: var(--bg); }

/* Notifications */
.notif-list {
  display: flex;
  flex-direction: column;
}

.notif-item {
  display: flex;
  gap: 14px;
  padding: 16px;
  border-bottom: 1px solid var(--border);
  transition: background-color var(--t-fast);
}

.notif-item:hover { background: var(--bg-hover); }

.notif-item.is-unread {
  background: var(--accent-soft);
  position: relative;
}

.notif-item.is-unread::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 50%;
  transform: translateY(-50%);
  width: 6px;
  height: 6px;
  background: var(--accent);
  border-radius: 50%;
}

.notif-text {
  flex: 1;
  font-size: 14px;
  line-height: 1.5;
}

.notif-text strong { font-weight: 700; }

.notif-time {
  font-size: 11px;
  font-family: var(--font-mono);
  color: var(--text-muted);
  letter-spacing: 0.04em;
  margin-top: 4px;
  display: block;
}

/* Messages */
.msg-shell {
  display: grid;
  grid-template-columns: 320px 1fr;
  height: calc(100vh - var(--header-h));
  background: var(--bg);
}

.msg-list {
  border-right: 1px solid var(--border);
  background: var(--bg-elevated);
  display: flex;
  flex-direction: column;
}

.msg-list-head {
  padding: 16px 20px;
  border-bottom: 1px solid var(--border);
}

.msg-search {
  width: 100%;
  border: 1px solid var(--border);
  border-radius: var(--radius-full);
  padding: 8px 14px;
  font-size: 13px;
  background: var(--bg-subtle);
  outline: none;
}

.conv-list {
  flex: 1;
  overflow-y: auto;
}

.conv-item {
  display: flex;
  gap: 12px;
  padding: 14px 20px;
  border-bottom: 1px solid var(--border);
  cursor: pointer;
  transition: background-color var(--t-fast);
}

.conv-item:hover { background: var(--bg-hover); }

.conv-item.is-active {
  background: var(--bg-subtle);
  border-left: 3px solid var(--accent);
  padding-left: 17px;
}

.conv-meta {
  flex: 1;
  min-width: 0;
}

.conv-meta-row {
  display: flex;
  justify-content: space-between;
  font-size: 14px;
  font-weight: 700;
  margin-bottom: 4px;
}

.conv-time {
  font-size: 11px;
  font-family: var(--font-mono);
  color: var(--text-muted);
  font-weight: 400;
}

.conv-preview {
  font-size: 13px;
  color: var(--text-secondary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.conv-item.has-unread .conv-preview {
  color: var(--text-primary);
  font-weight: 600;
}

.conv-item.has-unread::after {
  content: "";
  width: 8px;
  height: 8px;
  background: var(--accent);
  border-radius: 50%;
  align-self: center;
  flex-shrink: 0;
}

/* Conversation */
.conv-pane {
  display: flex;
  flex-direction: column;
  height: 100%;
}

.conv-head {
  padding: 16px 24px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: 12px;
  background: var(--bg-elevated);
}

.conv-head-meta {
  flex: 1;
}

.conv-head-meta strong {
  font-size: 15px;
  font-weight: 700;
}

.conv-head-meta span {
  font-size: 12px;
  color: var(--text-muted);
  display: block;
}

.conv-body {
  flex: 1;
  overflow-y: auto;
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.msg-day {
  text-align: center;
  font-size: 11px;
  font-family: var(--font-mono);
  color: var(--text-muted);
  letter-spacing: 0.16em;
  margin: 12px 0;
}

.msg {
  max-width: 70%;
  padding: 10px 16px;
  border-radius: 18px;
  font-size: 14px;
  line-height: 1.5;
}

.msg.in {
  background: var(--bg-subtle);
  color: var(--text-primary);
  align-self: flex-start;
  border-bottom-left-radius: 4px;
}

.msg.out {
  background: var(--accent);
  color: #fff;
  align-self: flex-end;
  border-bottom-right-radius: 4px;
}

.msg-time {
  font-size: 10px;
  font-family: var(--font-mono);
  color: var(--text-muted);
  margin: 0 12px;
  letter-spacing: 0.04em;
}

.msg-time.out { align-self: flex-end; }

.conv-foot {
  padding: 16px 20px;
  border-top: 1px solid var(--border);
  display: flex;
  align-items: flex-end;
  gap: 8px;
  background: var(--bg-elevated);
}

.composer {
  flex: 1;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 10px 14px;
  background: var(--bg-subtle);
  font-size: 14px;
  resize: none;
  min-height: 42px;
  max-height: 120px;
  outline: none;
  font-family: inherit;
  color: var(--text-primary);
}

.composer:focus { border-color: var(--text-primary); }

@media (max-width: 768px) {
  .msg-shell { grid-template-columns: 1fr; }
  .msg-list { display: none; }
}