/* ============================================
   NexusHQ — Layout
   ============================================ */

/* ---- App Shell ---- */
.app {
  display: flex;
  min-height: 100vh;
}

/* ---- Sidebar ---- */
.sidebar {
  width: var(--sidebar-width);
  background: var(--color-surface);
  border-right: 1px solid var(--color-border);
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0;
  left: 0;
  height: 100vh;
  overflow-y: auto;
  overflow-x: hidden;
  z-index: 100;
  flex-shrink: 0;
}

.sidebar__logo {
  padding: var(--space-5) var(--space-5);
  border-bottom: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex-shrink: 0;
}

.sidebar__logo-mark {
  width: 30px;
  height: 30px;
  background: linear-gradient(135deg, var(--color-gold) 0%, var(--color-lavender) 100%);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-size: var(--text-sm);
  font-weight: var(--weight-bold);
  color: var(--color-base);
  flex-shrink: 0;
}

.sidebar__logo-name {
  font-family: var(--font-display);
  font-size: var(--text-md);
  font-weight: var(--weight-semibold);
  color: var(--color-starlight);
  letter-spacing: 0.06em;
  line-height: 1;
}

.sidebar__nav {
  flex: 1;
  padding: var(--space-3) 0;
  overflow-y: auto;
}

.sidebar__section-label {
  font-size: var(--text-xs);
  font-weight: var(--weight-semibold);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-ash);
  padding: var(--space-4) var(--space-5) var(--space-1);
}

.sidebar__link {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-2) var(--space-5);
  color: var(--color-ash-light);
  font-size: var(--text-base);
  font-weight: var(--weight-medium);
  transition: all var(--transition-fast);
  border-left: 2px solid transparent;
  text-decoration: none;
}

.sidebar__link:hover {
  color: var(--color-starlight);
  background: var(--color-gold-dim);
  border-left-color: rgba(191, 160, 85, 0.4);
}

.sidebar__link.active {
  color: var(--color-gold);
  background: var(--color-gold-dim);
  border-left-color: var(--color-gold);
}

.sidebar__link-icon {
  font-size: 1rem;
  width: 18px;
  text-align: center;
  flex-shrink: 0;
  line-height: 1;
}

.sidebar__divider {
  height: 1px;
  background: var(--color-border);
  margin: var(--space-2) var(--space-5);
}

.sidebar__footer {
  padding: var(--space-4) var(--space-5);
  border-top: 1px solid var(--color-border);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  flex-shrink: 0;
}

.sidebar__user-email {
  font-size: var(--text-xs);
  color: var(--color-ash);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.sidebar__signout {
  font-size: var(--text-sm);
  color: var(--color-ash);
  font-weight: var(--weight-medium);
  cursor: pointer;
  text-align: left;
  transition: color var(--transition-fast);
}

.sidebar__signout:hover { color: var(--color-supernova); }

/* ---- Main Content ---- */
.main {
  flex: 1;
  margin-left: var(--sidebar-width);
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  min-width: 0;
}

.page-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-4);
  padding: var(--space-8) var(--space-8) var(--space-5);
  border-bottom: 1px solid var(--color-border);
  flex-shrink: 0;
}

.page-header__left {}

.page-header__title {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  color: var(--color-starlight);
  letter-spacing: 0.05em;
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.page-header__subtitle {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  color: var(--color-ash);
  margin-top: var(--space-1);
  font-weight: var(--weight-regular);
  letter-spacing: 0;
}

.page-header__actions {
  display: flex;
  gap: var(--space-3);
  align-items: center;
  flex-shrink: 0;
}

.page-content {
  flex: 1;
  padding: var(--space-8);
  overflow-y: auto;
}

/* ---- Detail Panel (slide-out) ---- */
.detail-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.55);
  backdrop-filter: blur(2px);
  z-index: 200;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-base);
}

.detail-overlay.open {
  opacity: 1;
  pointer-events: all;
}

.detail-panel {
  position: fixed;
  top: 0;
  right: 0;
  width: var(--panel-width);
  max-width: 100vw;
  height: 100vh;
  background: var(--color-surface);
  border-left: 1px solid var(--color-border);
  z-index: 201;
  display: flex;
  flex-direction: column;
  transform: translateX(100%);
  transition: transform var(--transition-slow);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
}

.detail-panel.open {
  transform: translateX(0);
}

.detail-panel__header {
  padding: var(--space-5) var(--space-6);
  border-bottom: 1px solid var(--color-border);
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-4);
  flex-shrink: 0;
}

.detail-panel__title {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  color: var(--color-starlight);
  letter-spacing: 0.03em;
  line-height: 1.3;
}

.detail-panel__close {
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  color: var(--color-ash);
  font-size: var(--text-lg);
  transition: all var(--transition-fast);
  flex-shrink: 0;
  cursor: pointer;
}

.detail-panel__close:hover {
  background: var(--color-surface-2);
  color: var(--color-starlight);
}

.detail-panel__body {
  flex: 1;
  overflow-y: auto;
  padding: var(--space-6);
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
}

.detail-panel__footer {
  padding: var(--space-4) var(--space-6);
  border-top: 1px solid var(--color-border);
  display: flex;
  gap: var(--space-3);
  align-items: center;
  flex-shrink: 0;
}

.detail-panel__footer .spacer { flex: 1; }

/* ---- Add Item Modal ---- */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.65);
  backdrop-filter: blur(2px);
  z-index: 300;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-8);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-base);
}

.modal-overlay.open {
  opacity: 1;
  pointer-events: all;
}

.modal {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  width: 100%;
  max-width: 560px;
  box-shadow: var(--shadow-lg);
  transform: translateY(16px);
  transition: transform var(--transition-base);
}

.modal-overlay.open .modal {
  transform: translateY(0);
}

.modal__header {
  padding: var(--space-5) var(--space-6);
  border-bottom: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.modal__title {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  color: var(--color-starlight);
  letter-spacing: 0.04em;
}

.modal__close {
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  color: var(--color-ash);
  font-size: var(--text-md);
  transition: all var(--transition-fast);
  cursor: pointer;
}

.modal__close:hover {
  background: var(--color-surface-2);
  color: var(--color-starlight);
}

.modal__body {
  padding: var(--space-6);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.modal__footer {
  padding: var(--space-4) var(--space-6);
  border-top: 1px solid var(--color-border);
  display: flex;
  justify-content: flex-end;
  gap: var(--space-3);
}