/* ── App layout ───────────────────────────────────────────────── */

#app {
  display: flex;
  min-height: 100vh;
}

.app-sidebar {
  position: fixed;
  top: 0;
  left: 0;
  width: var(--nav-width);
  height: 100vh;
  background: var(--color-surface);
  border-right: 1px solid var(--color-border);
  display: flex;
  flex-direction: column;
  z-index: 100;
  transition: transform var(--duration) var(--ease);
}

.app-main {
  margin-left: var(--nav-width);
  flex: 1;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.app-header {
  position: sticky;
  top: 0;
  height: var(--header-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--sp-8);
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  z-index: 50;
}

.app-content {
  flex: 1;
  padding: var(--sp-8);
  max-width: var(--content-max);
  width: 100%;
  margin: 0 auto;
}

/* ── Sidebar nav ──────────────────────────────────────────────── */

.nav-brand {
  padding: var(--sp-5) var(--sp-6);
  border-bottom: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  gap: var(--sp-3);
}
.nav-brand-icon {
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.nav-brand-icon img {
  width: 56px;
  height: 56px;
  object-fit: contain;
}
.nav-brand-text {
  font-weight: 700;
  font-size: var(--text-lg);
}

.nav-section {
  padding: var(--sp-4) var(--sp-3);
}
.nav-section-label {
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--color-text-dim);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 0 var(--sp-3) var(--sp-2);
}
.nav-link {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  padding: var(--sp-2) var(--sp-3);
  border-radius: var(--radius-md);
  color: var(--color-text-muted);
  font-size: var(--text-sm);
  font-weight: 500;
  transition: all var(--duration) var(--ease);
  cursor: pointer;
  text-decoration: none;
}
.nav-link:hover {
  background: var(--color-surface-hover);
  color: var(--color-text);
}
.nav-link.active {
  background: var(--color-primary-dim);
  color: var(--color-primary);
}
.nav-link .nav-icon {
  width: 20px;
  height: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--text-base);
}

.nav-footer {
  margin-top: auto;
  padding: var(--sp-4) var(--sp-3);
  border-top: 1px solid var(--color-border);
}
.nav-user {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  padding: var(--sp-2) var(--sp-3);
  border-radius: var(--radius-md);
  cursor: pointer;
}
.nav-user:hover {
  background: var(--color-surface-hover);
}
.nav-avatar {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-full);
  background: var(--color-primary-dim);
  color: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  font-size: var(--text-sm);
}
.nav-user-info {
  flex: 1;
  min-width: 0;
}
.nav-user-name {
  font-size: var(--text-sm);
  font-weight: 500;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.nav-user-plan {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}

/* ── Page header ──────────────────────────────────────────────── */

.page-header {
  margin-bottom: var(--sp-8);
}
.page-title {
  font-size: var(--text-2xl);
  font-weight: 700;
  margin-bottom: var(--sp-1);
}
.page-desc {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

/* ── Auth pages ───────────────────────────────────────────────── */

.auth-layout {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  padding: var(--sp-4);
}
.auth-card {
  width: 100%;
  max-width: 420px;
}
.auth-card .nav-brand {
  justify-content: center;
  border: none;
  padding-bottom: var(--sp-8);
}

/* ── Marketplace grid ─────────────────────────────────────────── */

.marketplace-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: var(--sp-6);
}

.listing-card {
  display: flex;
  flex-direction: column;
  gap: var(--sp-3);
}
.listing-card .listing-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  background: var(--color-primary-dim);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
}
.listing-card .listing-name {
  font-size: var(--text-lg);
  font-weight: 600;
}
.listing-card .listing-seller {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}
.listing-card .listing-desc {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.listing-card .listing-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: auto;
  padding-top: var(--sp-3);
  border-top: 1px solid var(--color-border);
}
.listing-price {
  font-weight: 600;
  color: var(--color-success);
}

/* ── Agent builder ────────────────────────────────────────────── */

.builder-layout {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: var(--sp-6);
  min-height: 60vh;
}
.builder-library {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--sp-4);
  overflow-y: auto;
  max-height: 70vh;
}
.library-title {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--sp-3);
}
.library-item {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  padding: var(--sp-3);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  margin-bottom: var(--sp-2);
  background: var(--color-bg);
  font-size: var(--text-sm);
}
.library-item .item-icon {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.library-item .item-info {
  flex: 1;
  min-width: 0;
}
.library-item .item-name {
  font-weight: 500;
}
.library-item .item-desc {
  font-size: var(--text-xs);
  color: var(--color-text-dim);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.builder-canvas {
  display: flex;
  flex-direction: column;
  gap: var(--sp-6);
}
.builder-section {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--sp-6);
}
.builder-section-title {
  font-size: var(--text-base);
  font-weight: 600;
  margin-bottom: var(--sp-4);
  display: flex;
  align-items: center;
  gap: var(--sp-2);
}

/* ── Slots page ───────────────────────────────────────────────── */

.slots-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: var(--sp-4);
}
.slot-card {
  position: relative;
}
.slot-card .slot-status {
  position: absolute;
  top: var(--sp-3);
  right: var(--sp-3);
}
.slot-card .slot-agent-name {
  font-weight: 600;
  font-size: var(--text-lg);
}
.slot-empty {
  border-style: dashed;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--sp-3);
  color: var(--color-text-muted);
  min-height: 160px;
}

/* ── Dashboard ────────────────────────────────────────────────── */

.dashboard-stats {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: var(--sp-4);
  margin-bottom: var(--sp-8);
}

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

.chat-container {
  display: flex;
  flex-direction: column;
  height: calc(100vh - var(--header-height) - var(--sp-16));
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}
.chat-messages {
  flex: 1;
  overflow-y: auto;
  padding: var(--sp-6);
  display: flex;
  flex-direction: column;
  gap: var(--sp-4);
}
.chat-bubble {
  max-width: 70%;
  padding: var(--sp-3) var(--sp-4);
  border-radius: var(--radius-lg);
  font-size: var(--text-sm);
  line-height: 1.6;
}
.chat-bubble.user {
  align-self: flex-end;
  background: var(--color-primary);
  color: #fff;
  border-bottom-right-radius: var(--sp-1);
}
.chat-bubble.assistant {
  align-self: flex-start;
  background: var(--color-surface-alt);
  border-bottom-left-radius: var(--sp-1);
}
.chat-input-bar {
  display: flex;
  gap: var(--sp-3);
  padding: var(--sp-4) var(--sp-6);
  border-top: 1px solid var(--color-border);
}
.chat-input-bar .form-input {
  flex: 1;
}

/* ── Search bar ───────────────────────────────────────────────── */

.search-bar {
  position: relative;
}
.search-bar .search-icon {
  position: absolute;
  left: var(--sp-3);
  top: 50%;
  transform: translateY(-50%);
  color: var(--color-text-dim);
  pointer-events: none;
}
.search-bar .form-input {
  padding-left: var(--sp-10);
  width: 100%;
}

/* ── Filter bar ───────────────────────────────────────────────── */

.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-3);
  align-items: center;
  margin-bottom: var(--sp-6);
}

/* ── Toast ────────────────────────────────────────────────────── */

.toast-container {
  position: fixed;
  top: var(--sp-4);
  right: var(--sp-4);
  z-index: 1000;
  display: flex;
  flex-direction: column;
  gap: var(--sp-2);
}
.toast {
  padding: var(--sp-3) var(--sp-5);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  font-weight: 500;
  animation: toast-in 300ms var(--ease);
  box-shadow: var(--shadow-lg);
  max-width: 360px;
}
.toast.toast-success { background: #059669; color: #fff; }
.toast.toast-error { background: #dc2626; color: #fff; }
.toast.toast-info { background: var(--color-primary); color: #fff; }
@keyframes toast-in {
  from { opacity: 0; transform: translateX(100px); }
  to { opacity: 1; transform: translateX(0); }
}

/* ── Mobile responsive ────────────────────────────────────────── */

.mobile-menu-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--color-text);
  font-size: 1.5rem;
  cursor: pointer;
  padding: var(--sp-2);
}

.sidebar-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.5);
  z-index: 90;
}
.sidebar-overlay.open {
  display: block;
}

.sidebar-close {
  display: none;
  margin-left: auto;
  background: none;
  border: none;
  font-size: 1.75rem;
  line-height: 1;
  color: var(--color-text);
  cursor: pointer;
  padding: 0 var(--sp-2);
}

@media (max-width: 768px) {
  html, body {
    overflow-x: hidden;
  }
  .app-sidebar {
    transform: translateX(-100%);
    width: 280px;
  }
  .app-sidebar.open {
    transform: translateX(0);
  }
  .app-main {
    margin-left: 0;
    width: 100%;
    max-width: 100vw;
    overflow-x: hidden;
  }
  .mobile-menu-toggle {
    display: block;
  }
  .sidebar-close {
    display: block;
  }
  .builder-layout {
    grid-template-columns: 1fr;
  }
  .builder-library {
    max-height: 300px;
  }
  .marketplace-grid {
    grid-template-columns: 1fr;
  }
  .chat-bubble {
    max-width: 85%;
  }
  .app-header {
    padding: 0 var(--sp-4);
  }
  .app-content {
    padding: var(--sp-4);
    max-width: 100%;
  }
}

@media (max-width: 480px) {
  .dashboard-stats {
    grid-template-columns: 1fr;
  }
  .slots-grid {
    grid-template-columns: 1fr;
  }
}

/* ── Modal overlay ──────────────────────────────────────────── */

.modal-overlay {
  position: fixed;
  inset: 0;
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(4px);
  animation: fadeIn var(--duration) var(--ease);
}

.modal {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--sp-6);
  width: 90%;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.4);
  animation: slideUp 0.2s var(--ease);
}

@keyframes slideUp {
  from { transform: translateY(20px); opacity: 0; }
  to   { transform: translateY(0); opacity: 1; }
}

.plan-option {
  display: block;
  width: 100%;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--sp-4);
  cursor: pointer;
  text-align: left;
  transition: border-color var(--duration) var(--ease), background var(--duration) var(--ease);
}
.plan-option:hover:not(:disabled) {
  border-color: var(--color-primary);
  background: var(--color-surface);
}
.plan-option:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

/* ── Upload dropzone ────────────────────────────────────────── */

.upload-dropzone {
  border: 2px dashed var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--sp-8) var(--sp-4);
  text-align: center;
  cursor: pointer;
  transition: border-color var(--duration), background var(--duration);
}

.upload-dropzone:hover,
.upload-dropzone.dragover {
  border-color: var(--color-primary);
  background: var(--color-primary-dim);
}

/* ── KB-specific styles ─────────────────────────────────────── */

.kb-card {
  transition: border-color var(--duration), box-shadow var(--duration);
}

.kb-card:hover {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 1px var(--color-primary);
}

/* ── Analytics bar chart ─────────────────────────────────────── */

.analytics-bar-chart {
  display: flex;
  align-items: flex-end;
  gap: 2px;
  height: 64px;
  width: 100%;
}

.analytics-bar-col {
  flex: 1;
  display: flex;
  align-items: flex-end;
  height: 100%;
  cursor: default;
}

.analytics-bar {
  width: 100%;
  border-radius: 2px 2px 0 0;
  min-height: 2px;
  transition: opacity 0.15s;
}

.analytics-bar-col:hover .analytics-bar {
  opacity: 0.75;
}

/* ── Integration / Skill Catalogue ──────────────────────────── */

.catalogue-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: var(--sp-4);
}

.integration-card {
  transition: border-color var(--duration), box-shadow var(--duration);
}

.integration-card:hover {
  box-shadow: 0 2px 12px rgba(0,0,0,0.12);
}

.skill-card {
  transition: border-color var(--duration), box-shadow var(--duration);
  cursor: pointer;
}

.skill-card:hover {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 1px var(--color-primary-dim);
}

.tab-btn {
  border: 1px solid var(--border-color);
  background: var(--bg-secondary);
  color: var(--text-muted);
  border-radius: var(--radius-full);
  transition: all var(--duration);
}

.tab-btn.active,
.tab-btn:hover {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: #fff;
}

.btn-success {
  background: var(--color-success);
  border-color: var(--color-success);
  color: #fff;
}

.btn-success:hover {
  opacity: 0.88;
}

.col-span-full {
  grid-column: 1 / -1;
}

/* ── Learning System ─────────────────────────────────────────── */

.lesson-card {
  cursor: pointer;
  transition: border-color var(--duration), box-shadow var(--duration);
  position: relative;
}

.lesson-card:hover {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 1px var(--color-primary-dim);
}

.lesson-card.completed {
  border-color: var(--color-success);
}

.lesson-card.completed::after {
  content: '✓';
  position: absolute;
  top: var(--sp-3);
  right: var(--sp-3);
  background: var(--color-success);
  color: #fff;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 11px;
  font-weight: 700;
}

.lesson-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 2px 8px;
  border-radius: var(--radius-full);
  font-size: 11px;
  font-weight: 600;
  background: var(--bg-tertiary);
  color: var(--text-muted);
  border: 1px solid var(--border-color);
}

.lesson-badge.reward {
  background: #fef3c7;
  color: #92400e;
  border-color: #fde68a;
}

.path-card {
  cursor: pointer;
  transition: border-color var(--duration), box-shadow var(--duration);
}

.path-card:hover {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 1px var(--color-primary-dim);
}

.path-progress-bar {
  height: 4px;
  background: var(--border-color);
  border-radius: 2px;
  overflow: hidden;
  margin-top: var(--sp-2);
}

.path-progress-fill {
  height: 100%;
  background: var(--color-primary);
  border-radius: 2px;
  transition: width 0.4s ease;
}

.lesson-detail-step {
  display: flex;
  gap: var(--sp-3);
  margin-bottom: var(--sp-3);
}

.lesson-step-num {
  flex-shrink: 0;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--color-primary);
  color: #fff;
  font-size: 11px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
}

.example-prompt {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: var(--sp-2) var(--sp-3);
  font-size: 13px;
  cursor: pointer;
  transition: border-color var(--duration);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--sp-2);
}

.example-prompt:hover {
  border-color: var(--color-primary);
}

.gig-bubble {
  padding: var(--sp-3) var(--sp-4);
  border-radius: var(--radius);
  max-width: 85%;
  font-size: 13px;
  line-height: 1.5;
}

.gig-bubble.user {
  background: var(--color-primary);
  color: #fff;
  align-self: flex-end;
  margin-left: auto;
}

.gig-bubble.gig {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  align-self: flex-start;
}

.learn-stats-bar {
  display: flex;
  gap: var(--sp-4);
  flex-wrap: wrap;
  margin-bottom: var(--sp-6);
}

.learn-stat {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: var(--sp-3) var(--sp-4);
  min-width: 120px;
}

/* ───────────────────────────────────────────────────────────────
   Polish layer — light theme micro-interactions (2026-04-21)
   Adds engaging hover/focus states + page transitions without
   changing any existing selector structure.
   ─────────────────────────────────────────────────────────────── */

/* Page fade-in on route change */
.app-content > * {
  animation: exf-fade-in 260ms var(--ease-out) both;
}
@keyframes exf-fade-in {
  from { opacity: 0; transform: translateY(6px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* Card lift */
.card {
  box-shadow: var(--shadow-sm);
  transition: transform var(--duration-fast) var(--ease-out),
              box-shadow var(--duration-fast) var(--ease-out),
              border-color var(--duration-fast) var(--ease-out);
}
.card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  border-color: rgba(234,88,12,0.18);
}

/* Primary button — glow on hover, subtle press */
.btn-primary {
  box-shadow: 0 1px 3px rgba(234,88,12,0.18);
  background: linear-gradient(135deg, var(--color-primary), #f97316);
}
.btn-primary:hover:not(:disabled) {
  box-shadow: var(--shadow-glow);
  transform: translateY(-1px);
}
.btn-primary:active:not(:disabled) {
  transform: translateY(0);
}

/* Focus ring — keyboard nav accessibility */
:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

/* Sidebar link active state — accent bar */
.nav-link.active,
.nav-item.active {
  position: relative;
  color: var(--color-primary);
  background: var(--color-primary-dim);
}
.nav-link.active::before,
.nav-item.active::before {
  content: "";
  position: absolute;
  left: 0; top: 25%;
  width: 3px; height: 50%;
  background: var(--color-primary);
  border-radius: 0 3px 3px 0;
}

/* Toast pop-in */
.toast {
  animation: exf-toast-in 220ms var(--ease-out) both;
}
@keyframes exf-toast-in {
  from { opacity: 0; transform: translateY(8px) scale(0.98); }
  to   { opacity: 1; transform: translateY(0) scale(1); }
}

/* Link hover underline slide (subtle) */
a:not(.btn):not(.nav-brand):not(.nav-link):not(.nav-item) {
  background-image: linear-gradient(currentColor, currentColor);
  background-repeat: no-repeat;
  background-size: 0% 1px;
  background-position: 0 100%;
  transition: background-size var(--duration-fast) var(--ease-out);
}
a:not(.btn):not(.nav-brand):not(.nav-link):not(.nav-item):hover {
  background-size: 100% 1px;
}

/* Form focus — brand-ring */
.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  box-shadow: 0 0 0 3px rgba(234,88,12,0.18);
}

/* Disabled state contrast */
.btn:disabled {
  filter: grayscale(0.3);
}

/* Stat card hover */
.stat-card {
  box-shadow: var(--shadow-sm);
  transition: transform var(--duration-fast) var(--ease-out),
              box-shadow var(--duration-fast) var(--ease-out);
}
.stat-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}