/* ---- APP SHELL ---- */
.app-nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(12, 17, 23, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(255,255,255,0.06);
  padding: 0 var(--space-md);
}

.app-nav-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: var(--space-md);
  height: 60px;
}

.nav-brand {
  font-family: var(--font-display);
  font-size: 1.3rem;
  color: var(--accent);
  text-decoration: none;
  flex-shrink: 0;
}

.nav-links {
  display: flex;
  gap: var(--space-sm);
  flex: 1;
}

.nav-link {
  font-size: 0.9rem;
  color: var(--fg-muted);
  text-decoration: none;
  transition: color 0.2s;
}

.nav-link:hover {
  color: var(--fg);
}

.nav-logout {
  background: none;
  border: 1px solid rgba(255,255,255,0.1);
  color: var(--fg-muted);
  font-family: var(--font-body);
  font-size: 0.85rem;
  padding: 6px 14px;
  border-radius: 6px;
  cursor: pointer;
  transition: all 0.2s;
}

.nav-logout:hover {
  border-color: rgba(212,165,116,0.3);
  color: var(--accent);
}

.app-main {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: var(--space-lg) var(--space-md);
  min-height: calc(100vh - 60px);
}

/* ---- PAGE HEADERS ---- */
.page-header {
  margin-bottom: var(--space-lg);
}

.page-header h1 {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 3vw, 2.5rem);
  color: var(--fg);
  margin-bottom: var(--space-xs);
}

.page-header p {
  color: var(--fg-muted);
  font-size: 0.95rem;
}

/* ---- BUTTONS ---- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.9rem;
  padding: 10px 20px;
  border-radius: 8px;
  border: none;
  cursor: pointer;
  text-decoration: none;
  transition: all 0.2s;
}

.btn-primary {
  background: var(--accent);
  color: #0C1117;
}

.btn-primary:hover {
  background: var(--accent-light);
}

.btn-secondary {
  background: var(--bg-alt);
  color: var(--fg);
  border: 1px solid rgba(255,255,255,0.08);
}

.btn-secondary:hover {
  border-color: rgba(212,165,116,0.3);
}

.btn-ghost {
  background: none;
  color: var(--fg-muted);
  border: 1px solid rgba(255,255,255,0.08);
}

.btn-ghost:hover {
  color: var(--fg);
  border-color: rgba(255,255,255,0.15);
}

.btn-danger {
  background: rgba(220, 60, 60, 0.15);
  color: #e07070;
  border: 1px solid rgba(220, 60, 60, 0.2);
}

.btn-danger:hover {
  background: rgba(220, 60, 60, 0.25);
}

.btn-ai {
  background: linear-gradient(135deg, rgba(91,138,154,0.2) 0%, rgba(212,165,116,0.15) 100%);
  color: var(--accent-light);
  border: 1px solid rgba(91,138,154,0.25);
}

.btn-ai:hover {
  background: linear-gradient(135deg, rgba(91,138,154,0.3) 0%, rgba(212,165,116,0.25) 100%);
}

.btn-sm {
  padding: 6px 14px;
  font-size: 0.82rem;
}

/* ---- CARDS ---- */
.card {
  background: var(--bg-alt);
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: 12px;
  padding: var(--space-md);
  transition: border-color 0.2s;
}

.card:hover {
  border-color: rgba(212,165,116,0.15);
}

.card-link {
  text-decoration: none;
  color: inherit;
  display: block;
}

/* ---- STAT CARDS ---- */
.stats-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-sm);
  margin-bottom: var(--space-lg);
}

.stat-item {
  background: var(--bg-alt);
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: 12px;
  padding: var(--space-md);
}

.stat-item .stat-number {
  font-size: 2rem;
}

/* ---- FORMS ---- */
.form-group {
  margin-bottom: var(--space-md);
}

.form-label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--fg-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 8px;
}

.form-input,
.form-textarea,
.form-select {
  width: 100%;
  background: var(--bg);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 8px;
  padding: 10px 14px;
  color: var(--fg);
  font-family: var(--font-body);
  font-size: 0.95rem;
  transition: border-color 0.2s;
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
  outline: none;
  border-color: rgba(212,165,116,0.4);
}

.form-input::placeholder,
.form-textarea::placeholder {
  color: var(--fg-muted);
  opacity: 0.5;
}

.form-textarea {
  resize: vertical;
  min-height: 100px;
  line-height: 1.6;
}

.form-select option {
  background: var(--bg-alt);
}

.form-hint {
  font-size: 0.8rem;
  color: var(--fg-muted);
  margin-top: 6px;
}

.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-md);
}

.form-section {
  margin-bottom: var(--space-lg);
}

.form-section-title {
  font-family: var(--font-display);
  font-size: 1.15rem;
  color: var(--fg);
  margin-bottom: var(--space-md);
  padding-bottom: var(--space-xs);
  border-bottom: 1px solid rgba(255,255,255,0.06);
}

.error-banner {
  background: rgba(220, 60, 60, 0.12);
  border: 1px solid rgba(220, 60, 60, 0.25);
  color: #e07070;
  border-radius: 8px;
  padding: 12px 16px;
  margin-bottom: var(--space-md);
  font-size: 0.9rem;
}

/* ---- CONVERSATION LIST ---- */
.convo-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.convo-item {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  background: var(--bg-alt);
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: 10px;
  padding: 14px 18px;
  text-decoration: none;
  color: inherit;
  transition: border-color 0.2s, background 0.2s;
}

.convo-item:hover {
  border-color: rgba(212,165,116,0.2);
  background: rgba(19,25,32,0.9);
}

.convo-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--ocean-dark), var(--accent-glow));
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-size: 1.1rem;
  color: var(--accent-light);
  flex-shrink: 0;
}

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

.convo-name {
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--fg);
}

.convo-preview {
  font-size: 0.83rem;
  color: var(--fg-muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  margin-top: 2px;
}

.convo-meta {
  text-align: right;
  flex-shrink: 0;
}

.convo-time {
  font-size: 0.78rem;
  color: var(--fg-muted);
}

.convo-property {
  font-size: 0.78rem;
  color: var(--ocean);
  margin-top: 2px;
}

/* ---- MESSAGE THREAD ---- */
.thread-container {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: var(--space-md);
  align-items: start;
}

.thread-messages {
  background: var(--bg-alt);
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: 12px;
  overflow: hidden;
}

.thread-header {
  padding: 16px var(--space-md);
  border-bottom: 1px solid rgba(255,255,255,0.06);
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.thread-guest-name {
  font-family: var(--font-display);
  font-size: 1.1rem;
}

.thread-property-badge {
  font-size: 0.8rem;
  background: rgba(91,138,154,0.15);
  color: var(--ocean);
  padding: 3px 10px;
  border-radius: 20px;
  border: 1px solid rgba(91,138,154,0.2);
}

.messages-scroll {
  padding: var(--space-md);
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  min-height: 300px;
  max-height: 60vh;
  overflow-y: auto;
}

.message-bubble {
  max-width: 75%;
  padding: 10px 16px;
  border-radius: 14px;
  font-size: 0.92rem;
  line-height: 1.55;
}

.message-bubble.guest {
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.08);
  color: var(--fg);
  align-self: flex-start;
  border-bottom-left-radius: 4px;
}

.message-bubble.host {
  background: rgba(212,165,116,0.12);
  border: 1px solid rgba(212,165,116,0.2);
  color: var(--accent-light);
  align-self: flex-end;
  border-bottom-right-radius: 4px;
}

.message-bubble.ai {
  background: linear-gradient(135deg, rgba(91,138,154,0.12) 0%, rgba(212,165,116,0.08) 100%);
  border: 1px solid rgba(91,138,154,0.2);
  color: var(--fg);
  align-self: flex-end;
  border-bottom-right-radius: 4px;
}

.message-label {
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 4px;
  font-weight: 600;
}

.message-label.guest { color: var(--fg-muted); }
.message-label.host { color: var(--accent); text-align: right; }
.message-label.ai { color: var(--ocean); text-align: right; }

.message-time {
  font-size: 0.72rem;
  color: var(--fg-muted);
  margin-top: 4px;
  text-align: right;
}

.thread-actions {
  padding: var(--space-md);
  border-top: 1px solid rgba(255,255,255,0.06);
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.thread-input-row {
  display: flex;
  gap: 8px;
}

.thread-input-row .form-input {
  flex: 1;
}

/* Thread sidebar */
.thread-sidebar {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.sidebar-card {
  background: var(--bg-alt);
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: 12px;
  padding: var(--space-md);
}

.sidebar-card h3 {
  font-family: var(--font-display);
  font-size: 1rem;
  color: var(--fg);
  margin-bottom: var(--space-sm);
  padding-bottom: 8px;
  border-bottom: 1px solid rgba(255,255,255,0.06);
}

.detail-row {
  display: flex;
  flex-direction: column;
  gap: 3px;
  margin-bottom: 12px;
}

.detail-label {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--fg-muted);
}

.detail-value {
  font-size: 0.88rem;
  color: var(--fg);
}

/* ---- AUTH ---- */
.auth-page {
  min-height: calc(100vh - 1px);
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg);
  padding: var(--space-md);
}

.auth-card {
  width: 100%;
  max-width: 420px;
  background: var(--bg-alt);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 16px;
  padding: var(--space-lg);
}

.auth-card .brand {
  font-family: var(--font-display);
  font-size: 1.8rem;
  color: var(--accent);
  text-align: center;
  margin-bottom: var(--space-xs);
}

.auth-card .tagline {
  text-align: center;
  color: var(--fg-muted);
  font-size: 0.9rem;
  margin-bottom: var(--space-lg);
}

.auth-switch {
  text-align: center;
  margin-top: var(--space-md);
  font-size: 0.88rem;
  color: var(--fg-muted);
}

.auth-switch a {
  color: var(--accent);
  text-decoration: none;
}

/* ---- PROPERTY GRID ---- */
.property-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--space-md);
}

.property-card {
  background: var(--bg-alt);
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: 12px;
  padding: var(--space-md);
  transition: border-color 0.2s;
}

.property-card:hover {
  border-color: rgba(212,165,116,0.2);
}

.property-card h3 {
  font-family: var(--font-display);
  font-size: 1.15rem;
  color: var(--fg);
  margin-bottom: 6px;
}

.property-card .address {
  font-size: 0.85rem;
  color: var(--fg-muted);
  margin-bottom: var(--space-sm);
}

.property-actions {
  display: flex;
  gap: 8px;
  margin-top: var(--space-sm);
  flex-wrap: wrap;
}

/* ---- EMPTY STATES ---- */
.empty-state {
  text-align: center;
  padding: var(--space-xl) var(--space-md);
  color: var(--fg-muted);
}

.empty-state .empty-icon {
  font-size: 3rem;
  margin-bottom: var(--space-sm);
  opacity: 0.4;
}

.empty-state h3 {
  font-family: var(--font-display);
  font-size: 1.4rem;
  color: var(--fg);
  margin-bottom: var(--space-xs);
}

.empty-state p {
  font-size: 0.92rem;
  margin-bottom: var(--space-md);
}

/* ---- BADGES ---- */
.badge {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  padding: 3px 10px;
  border-radius: 20px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.badge-active {
  background: rgba(91,154,91,0.15);
  color: #7ec87e;
  border: 1px solid rgba(91,154,91,0.2);
}

.badge-ai {
  background: rgba(91,138,154,0.15);
  color: var(--ocean);
  border: 1px solid rgba(91,138,154,0.2);
}

/* ---- RESPONSIVE ---- */
@media (max-width: 768px) {
  .app-main {
    padding: var(--space-md) var(--space-sm);
  }
  .stats-row {
    grid-template-columns: 1fr 1fr;
  }
  .thread-container {
    grid-template-columns: 1fr;
  }
  .form-grid {
    grid-template-columns: 1fr;
  }
  .nav-links {
    display: none;
  }
}