/* ═══════════════════════════════════════════════
   LAYOUT — Orbit
   Shell grid · nav bar · FAB · viewer chips
   ═══════════════════════════════════════════════ */

.shell {
  position: relative;
  z-index: var(--z-base);
  display: flex;
  flex-direction: column;
  min-height: 100dvh;
  overflow: hidden;
}

/* ── Main content area ── */
#app {
  flex: 1;
  position: relative;
  width: 100%;
  max-width: var(--content-max);
  margin: 0 auto;
  overflow: hidden;
  min-height: 0; /* allow flex shrink below content size */
}

/* Inner view scrollers get the scroll behavior */
#app > * {
  height: 100%;
  padding: calc(var(--space-lg) + (var(--safe-top) * 0.32)) var(--shell-padding);
  padding-bottom: calc(var(--nav-height) + var(--safe-bottom) + var(--space-2xl));
  overflow-y: auto;
  overflow-x: hidden;
  -webkit-overflow-scrolling: touch;
}

#app > .welcome-view {
  padding-top: calc(clamp(16px, 3.2vh, 40px) + (var(--safe-top) * 0.18));
  padding-bottom: max(var(--space-xl), calc(var(--safe-bottom) + var(--space-lg)));
}

.nav-bar,
.fab-container,
.session-exit-btn {
  transition:
    opacity var(--dur-fast) var(--ease-out),
    visibility var(--dur-fast) var(--ease-out),
    transform var(--dur-normal) var(--ease-out);
}

body[data-route="welcome"] .nav-bar {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transform: translateX(-50%) translateY(18px);
}

body[data-route="welcome"] .fab-container {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transform: translate(-50%, 40%);
}

body[data-route="welcome"] .session-exit-btn {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transform: translateY(-12px);
}

/* ── Bottom Navigation Bar ── */
.nav-bar {
  position: fixed;
  left: 50%;
  bottom: calc(8px + var(--safe-bottom));
  transform: translateX(-50%);
  width: min(calc(var(--content-max) + 40px), calc(100% - 20px));
  z-index: var(--z-nav);
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  align-items: center;
  gap: 0;
  min-height: var(--nav-height);
  padding: 6px 8px;
  background: rgba(17, 22, 39, 0.82);
  backdrop-filter: blur(20px) saturate(1.8);
  -webkit-backdrop-filter: blur(20px) saturate(1.8);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 20px;
  box-shadow:
    0 4px 24px rgba(0, 0, 0, 0.25),
    0 1px 4px rgba(0, 0, 0, 0.15);
}

.nav-bar::before {
  display: none;
}

.nav-item {
  appearance: none;
  border: none;
  background: transparent;
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2px;
  min-height: calc(var(--nav-height) - 16px);
  padding: 6px 4px 4px;
  border-radius: 14px;
  color: rgba(255, 255, 255, 0.45);
  z-index: 1;
  cursor: pointer;
  transition:
    color 200ms var(--ease-out),
    transform 100ms var(--ease-out);
  -webkit-tap-highlight-color: transparent;
}

.nav-item:focus-visible {
  outline: 2px solid var(--accent-shared);
  outline-offset: 2px;
}

.nav-item:active {
  transform: scale(0.92);
}

.nav-item:hover {
  color: rgba(255, 255, 255, 0.7);
}

.nav-icon-wrap {
  position: relative;
  width: 56px;
  height: 30px;
  border: none;
  border-radius: 999px;
  background: transparent;
  box-shadow: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition:
    background 250ms var(--ease-out),
    color 250ms var(--ease-out);
}

.nav-icon {
  position: relative;
  width: 22px;
  height: 22px;
  display: inline-flex;
  color: inherit;
}

.nav-badge {
  position: absolute;
  top: -4px;
  right: 6px;
  min-width: 16px;
  height: 16px;
  padding: 0 4px;
  border-radius: 999px;
  border: 2px solid rgba(255, 255, 255, 0.9);
  background: #ff3b30;
  color: #fff;
  font-size: 9px;
  line-height: 12px;
  font-weight: 700;
  text-align: center;
  box-shadow: 0 2px 6px rgba(255, 59, 48, 0.4);
  opacity: 0;
  transform: scale(0.5);
  transition:
    opacity 200ms var(--ease-spring),
    transform 200ms var(--ease-spring);
  pointer-events: none;
}

.nav-badge.visible {
  opacity: 1;
  transform: scale(1);
}

.nav-active-mark {
  display: none;
}

.nav-item.active {
  color: #fff;
}

.nav-item.active .nav-icon-wrap {
  background: rgba(255, 255, 255, 0.12);
  color: #fff;
}

.nav-label {
  position: relative;
  margin-top: 0;
  font-family: 'Neucha', var(--font-body);
  font-size: 11px;
  font-weight: var(--weight-medium);
  letter-spacing: 0.01em;
  line-height: 1;
  transition: color 200ms var(--ease-out);
}

.nav-item.active .nav-label {
  font-weight: var(--weight-bold);
}

.nav-icon svg {
  width: 100%;
  height: 100%;
}

/* ── FAB spacer in nav ── */
.nav-fab-spacer {
  width: var(--fab-size);
  flex-shrink: 0;
  justify-self: center;
  align-self: end;
  pointer-events: none;
}

/* ── Floating Action Button ── */
.fab-container {
  position: fixed;
  bottom: calc(var(--safe-bottom) + (var(--nav-height) / 2) + 8px);
  left: 50%;
  transform: translate(-50%, 24%);
  z-index: var(--z-fab);
}

.fab-button {
  width: 48px;
  height: 48px;
  border-radius: 16px;
  border: none;
  background: var(--accent-shared, #9d5fff);
  color: #fff;
  box-shadow:
    0 4px 16px rgba(157, 95, 255, 0.4),
    0 2px 6px rgba(0, 0, 0, 0.15);
  display: flex;
  align-items: center;
  justify-content: center;
  transition:
    transform 200ms var(--ease-out),
    background 200ms var(--ease-out),
    box-shadow 200ms var(--ease-out);
  -webkit-tap-highlight-color: transparent;
}

.fab-button:hover {
  transform: translateY(-2px);
  box-shadow:
    0 6px 24px rgba(157, 95, 255, 0.5),
    0 3px 8px rgba(0, 0, 0, 0.2);
}

.fab-button:active {
  transform: scale(0.92);
  box-shadow:
    0 2px 8px rgba(157, 95, 255, 0.3),
    0 1px 3px rgba(0, 0, 0, 0.12);
}

.fab-button:focus-visible {
  outline: 3px solid #111;
  outline-offset: 2px;
}

.fab-container.open .fab-button {
  background: #111;
  color: #fff;
  transform: translateY(-2px);
  box-shadow:
    0 6px 20px rgba(0, 0, 0, 0.35),
    0 2px 6px rgba(0, 0, 0, 0.2);
}

.fab-icon {
  position: relative;
  width: 18px;
  height: 18px;
}

.fab-icon::before,
.fab-icon::after {
  content: '';
  position: absolute;
  background: currentColor;
  border-radius: 2px;
  transition: transform var(--dur-normal) var(--ease-spring);
  top: 50%;
  left: 50%;
  width: 18px;
  height: 2px;
}

.fab-icon::before {
  transform: translate(-50%, -50%) rotate(0deg);
}

.fab-icon::after {
  transform: translate(-50%, -50%) rotate(90deg);
}

.fab-container.open .fab-icon::before {
  transform: translate(-50%, -50%) rotate(45deg);
}

.fab-container.open .fab-icon::after {
  transform: translate(-50%, -50%) rotate(-45deg);
}

/* ── FAB Menu ── */
.fab-menu {
  position: absolute;
  bottom: calc(100% + 10px);
  left: 50%;
  width: min(320px, calc(100vw - 26px));
  opacity: 0;
  transform: translate(-50%, 10px) scale(0.96);
  transition:
    opacity var(--dur-fast) var(--ease-out),
    transform var(--dur-normal) var(--ease-spring);
  pointer-events: none;
}

.fab-container.open .fab-menu {
  opacity: 1;
  transform: translate(-50%, 0) scale(1);
  pointer-events: auto;
}

.fab-menu-card {
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 20px;
  background: rgba(17, 22, 39, 0.88);
  backdrop-filter: blur(20px) saturate(1.8);
  -webkit-backdrop-filter: blur(20px) saturate(1.8);
  box-shadow:
    0 8px 32px rgba(0, 0, 0, 0.3),
    0 2px 8px rgba(0, 0, 0, 0.15);
  padding: 8px;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 6px;
}

.fab-menu-item {
  appearance: none;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  min-height: 72px;
  width: 100%;
  padding: 8px 6px;
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.08);
  box-shadow: none;
  color: #fff;
  gap: 4px;
  transition:
    transform 150ms var(--ease-out),
    background 150ms var(--ease-out);
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
}

.fab-menu-item:hover {
  transform: translateY(-1px);
  background: rgba(255, 255, 255, 0.14);
}

.fab-menu-item:active {
  transform: scale(0.95);
  background: rgba(255, 255, 255, 0.1);
}

.fab-menu-item:focus-visible {
  outline: 3px solid #111;
  outline-offset: 2px;
}

.fab-menu-icon {
  width: 28px;
  height: 28px;
  border: none;
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.1);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 15px;
  line-height: 1;
}

.fab-menu-copy {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1px;
  min-width: 0;
}

.fab-menu-title {
  font-size: 12px;
  line-height: 1.1;
  font-family: 'Neucha', var(--font-body);
  font-weight: var(--weight-semibold);
  white-space: nowrap;
}

.fab-menu-sub {
  font-size: 10px;
  line-height: 1.1;
  color: rgba(255, 255, 255, 0.5);
  max-width: 100%;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* ── FAB Overlay ── */
.fab-overlay {
  display: none;
  position: fixed;
  inset: 0;
  z-index: calc(var(--z-fab) - 1);
}

.fab-container.open .fab-overlay {
  display: block;
}

/* ── Session exit button ── */
.session-exit-btn {
  position: fixed;
  right: max(12px, calc((100vw - var(--content-max)) / 2 + 12px));
  top: calc(var(--safe-top) + 12px);
  left: auto;
  bottom: auto;
  z-index: calc(var(--z-nav) + 7);
  min-height: 34px;
  padding: 0 11px;
  border: 1.5px solid color-mix(in oklab, var(--comic-border) 84%, transparent);
  border-radius: 999px;
  background: color-mix(in oklab, var(--comic-bg-elevated) 88%, transparent);
  color: var(--comic-ink);
  font-family: 'Neucha', var(--font-body, sans-serif);
  font-size: 10.5px;
  letter-spacing: 0.04em;
  font-weight: 700;
  line-height: 1;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  box-shadow:
    0 10px 24px color-mix(in oklab, var(--comic-shadow) 50%, transparent),
    0 2px 5px color-mix(in oklab, var(--comic-shadow) 30%, transparent);
  backdrop-filter: blur(10px) saturate(1.4);
  -webkit-backdrop-filter: blur(10px) saturate(1.4);
  -webkit-tap-highlight-color: transparent;
}

body[data-dev-mode="1"] .session-exit-btn {
  top: calc(var(--safe-top) + 98px);
}

.session-exit-icon {
  width: 18px;
  height: 18px;
  border: 1.5px solid color-mix(in oklab, var(--comic-border) 72%, transparent);
  border-radius: 999px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  line-height: 1;
  background: color-mix(in oklab, var(--comic-bg) 88%, transparent);
}

.session-exit-label {
  white-space: nowrap;
}

.session-exit-btn:hover {
  transform: translateY(-2px);
  box-shadow:
    0 12px 26px color-mix(in oklab, var(--comic-shadow) 56%, transparent),
    0 3px 7px color-mix(in oklab, var(--comic-shadow) 32%, transparent);
}

.session-exit-btn:active {
  transform: translateY(0);
  box-shadow:
    0 6px 14px color-mix(in oklab, var(--comic-shadow) 40%, transparent),
    0 1px 4px color-mix(in oklab, var(--comic-shadow) 28%, transparent);
}

.session-exit-btn:focus-visible {
  outline: 2px solid var(--accent-shared);
  outline-offset: 2px;
}

.session-exit-btn.is-hidden {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transform: translateY(-10px);
}

/* ── Dev profile switcher ── */
.dev-profile-switcher {
  position: fixed;
  top: calc(env(safe-area-inset-top, 0px) + 12px);
  right: max(12px, calc((100vw - var(--content-max)) / 2 + 12px));
  z-index: calc(var(--z-nav) + 10);
  width: min(260px, calc(100vw - 24px));
  border: 2px solid var(--comic-border);
  border-radius: 14px;
  background: color-mix(in oklab, var(--comic-bg) 88%, transparent);
  backdrop-filter: blur(10px) saturate(1.5);
  -webkit-backdrop-filter: blur(10px) saturate(1.5);
  box-shadow: 3px 3px 0 var(--comic-shadow);
  padding: 8px;
  display: grid;
  gap: 8px;
}

.dev-profile-switcher.is-hidden {
  display: none;
}

.dev-profile-switcher-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.dev-profile-switcher-badge {
  min-height: 20px;
  padding: 0 8px;
  border-radius: 999px;
  border: 1.5px solid var(--comic-border);
  background: var(--comic-bg-elevated);
  font-family: 'Neucha', var(--font-body);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.08em;
}

.dev-profile-switcher-close {
  width: 22px;
  height: 22px;
  border: 1.5px solid var(--comic-border);
  border-radius: 50%;
  background: var(--comic-bg);
  color: var(--comic-ink);
  line-height: 1;
  font-size: 14px;
  cursor: pointer;
}

.dev-profile-switcher-buttons {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 6px;
}

.dev-profile-switcher-btn {
  border: 1.5px solid var(--comic-border);
  border-radius: 10px;
  min-height: 34px;
  background: var(--comic-bg);
  color: var(--comic-ink);
  font-family: var(--font-body, sans-serif);
  font-size: 12px;
  font-weight: 700;
  cursor: pointer;
  transition: transform var(--dur-fast) var(--ease-out), box-shadow var(--dur-fast) var(--ease-out);
}

.dev-profile-switcher-btn:hover {
  transform: translate(-1px, -1px);
  box-shadow: 2px 2px 0 var(--comic-shadow);
}

.dev-profile-switcher-btn.active {
  background: color-mix(in oklab, var(--dev-accent) 72%, var(--comic-bg));
  color: #fff;
}

/* ── Viewer Switch ── */
.viewer-switch {
  display: flex;
  gap: var(--space-sm);
  margin-bottom: var(--space-lg);
}

.viewer-chip {
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--radius-full);
  background: var(--surface);
  border: 1px solid var(--glass-border);
  font-size: var(--text-sm);
  font-weight: var(--weight-semibold);
  color: var(--ink-muted);
  transition: all var(--dur-fast) var(--ease-out);
  -webkit-tap-highlight-color: transparent;
}

.viewer-chip.active {
  color: #fff;
  border-color: transparent;
}

.viewer-chip[data-viewer="semen"].active {
  background: var(--accent-semen);
  box-shadow: var(--shadow-glow-s);
}

.viewer-chip[data-viewer="karina"].active {
  background: var(--accent-karina);
  box-shadow: var(--shadow-glow-k);
}

.viewer-chip:active {
  transform: scale(0.95);
}

.flow-viewer-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 34px;
  padding: 6px 12px;
  border-radius: 999px;
  border: 2px solid var(--comic-border);
  background: var(--comic-bg);
  box-shadow: 2px 2px 0 var(--comic-shadow);
}

.flow-viewer-dot {
  width: 10px;
  height: 10px;
  border-radius: 999px;
  background: var(--flow-viewer-accent, var(--accent-shared));
  box-shadow: 0 0 0 2px color-mix(in oklab, var(--flow-viewer-accent, var(--accent-shared)) 35%, transparent);
}

.flow-viewer-name {
  font-size: 13px;
  font-weight: 700;
  color: var(--comic-ink);
}

/* ── View Header ── */
.view-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-lg);
}

.view-header-left {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.view-header-right {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

/* ── Theme toggle ── */
.theme-toggle {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-full);
  background: var(--surface);
  border: 1px solid var(--glass-border);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--ink-muted);
  font-size: 16px;
  transition: all var(--dur-fast) var(--ease-out);
}

.theme-toggle:hover {
  background: var(--surface-hover);
  color: var(--ink);
}

/* ── Light theme overrides ── */
[data-theme="light"] .nav-bar {
  background: rgba(255, 255, 255, 0.88);
  border-color: rgba(0, 0, 0, 0.06);
  box-shadow:
    0 4px 24px rgba(0, 0, 0, 0.06),
    0 1px 4px rgba(0, 0, 0, 0.03);
}

[data-theme="light"] .nav-item {
  color: rgba(0, 0, 0, 0.38);
}

[data-theme="light"] .nav-item:hover {
  color: rgba(0, 0, 0, 0.6);
}

[data-theme="light"] .nav-item.active {
  color: #111;
}

[data-theme="light"] .nav-item.active .nav-icon-wrap {
  background: rgba(0, 0, 0, 0.07);
  color: #111;
}

[data-theme="light"] .nav-badge {
  border-color: rgba(255, 255, 255, 0.95);
}

[data-theme="light"] .fab-button {
  box-shadow:
    0 4px 16px rgba(131, 71, 224, 0.35),
    0 2px 6px rgba(0, 0, 0, 0.1);
}

[data-theme="light"] .fab-menu-card {
  background: rgba(255, 255, 255, 0.92);
  border-color: rgba(0, 0, 0, 0.06);
  box-shadow:
    0 8px 32px rgba(0, 0, 0, 0.12),
    0 2px 8px rgba(0, 0, 0, 0.06);
}

[data-theme="light"] .fab-menu-item {
  background: rgba(0, 0, 0, 0.04);
  border-color: rgba(0, 0, 0, 0.06);
  color: #111;
}

[data-theme="light"] .fab-menu-item:hover {
  background: rgba(0, 0, 0, 0.08);
}

[data-theme="light"] .fab-menu-icon {
  background: rgba(0, 0, 0, 0.06);
}

[data-theme="light"] .fab-menu-sub {
  color: #777;
}

[data-theme="light"] .viewer-chip {
  background: var(--surface-1);
  border-color: var(--glass-border);
}

[data-theme="light"] .dev-profile-switcher {
  background: color-mix(in oklab, #fff 86%, transparent);
}

[data-theme="light"] .session-exit-btn {
  background: color-mix(in oklab, #fff 90%, transparent);
}

[data-theme="light"] .theme-toggle {
  background: var(--surface-1);
}