/* Dev tooling — self-contained: carries its own reset, tokens, and motion so it
   drops into any Rails app unchanged. No framework assumed. */

.dev-trigger,
.dev-menu,
.dev-mailbox,
.dev-mailbox-dialog {
  --dev-page: #0c0a09;
  --dev-bg: #1c1917;
  --dev-hover: rgb(255 255 255 / 0.05);
  --dev-pressed: rgb(255 255 255 / 0.09);
  --dev-border: rgb(255 255 255 / 0.08);
  --dev-text: #fafaf9;
  --dev-text-muted: #a8a29e;
  --dev-text-faint: #78716c;
  --dev-accent: #fbbf24;
  --dev-danger: #f87171;
  --dev-sans: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --dev-mono: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  --ease-out-quint: cubic-bezier(0.23, 1, 0.32, 1);
  --ease-in-out-quart: cubic-bezier(0.77, 0, 0.175, 1);
}

body.dev-layout {
  margin: 0;
  min-height: 100dvh;
  background: var(--dev-page, #0c0a09);
}

.dev-mailbox-frame {
  display: block;
  height: 100%;
}

/* Trigger — a small dark glass chip fixed to the corner. */

.dev-trigger {
  position: fixed;
  inset: auto 1rem 1rem auto;
  z-index: 2000;
  touch-action: none;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.25rem;
  height: 2.25rem;
  border: 1px solid rgb(255 255 255 / 0.15);
  border-radius: 50%;
  background-color: rgb(12 10 9 / 0.4);
  background-image: linear-gradient(to bottom, rgb(255 255 255 / 0.15), rgb(255 255 255 / 0));
  color: #d6d3d1;
  cursor: pointer;
  user-select: none;
  -webkit-tap-highlight-color: transparent;
  -webkit-backdrop-filter: blur(12px) saturate(1.5);
  backdrop-filter: blur(12px) saturate(1.5);
  box-shadow:
    inset 0 1px 0 rgb(255 255 255 / 0.2),
    0 8px 16px -6px rgb(0 0 0 / 0.4);
  transition:
    transform 150ms var(--ease-out-quint),
    background-color 150ms ease,
    color 150ms ease;
}

/* 36px visual, 44px hit area. */
.dev-trigger::after {
  content: "";
  position: absolute;
  inset: -4px;
}

@media (hover: hover) and (pointer: fine) {
  .dev-trigger:hover {
    background-color: rgb(12 10 9 / 0.6);
    color: #fff;
  }
}

.dev-trigger:active {
  transform: scale(0.95);
}

.dev-trigger .dev-icon {
  width: 1rem;
  height: 1rem;
}

.dev-trigger:focus-visible {
  outline: 2px solid var(--dev-accent);
  outline-offset: 2px;
}

.dev-badge {
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: 1rem;
  height: 1rem;
  padding: 0 0.25rem;
  border-radius: 9999px;
  background: #ef4444;
  font: 700 0.625rem var(--dev-sans);
  color: #fff;
}

.dev-trigger .dev-badge {
  position: absolute;
  top: -0.25rem;
  right: -0.25rem;
  padding: 0;
}

/* The trigger can be dragged to any corner; the menu follows its anchor. */

html[data-dev-corner="bottom-left"] .dev-trigger {
  inset: auto auto 1rem 1rem;
}

html[data-dev-corner="top-right"] .dev-trigger {
  inset: 1rem 1rem auto auto;
}

html[data-dev-corner="top-left"] .dev-trigger {
  inset: 1rem auto auto 1rem;
}

html[data-dev-corner="bottom-left"] .dev-menu {
  inset: auto auto 3.75rem 1rem;
  transform-origin: bottom left;
}

html[data-dev-corner="top-right"] .dev-menu {
  inset: 3.75rem 1rem auto auto;
  transform-origin: top right;
}

html[data-dev-corner="top-left"] .dev-menu {
  inset: 3.75rem auto auto 1rem;
  transform-origin: top left;
}

/* Menu — the popover the trigger opens, styled like the mailbox panel. */

.dev-menu {
  position: fixed;
  inset: auto 1rem 3.75rem auto;
  margin: 0;
  width: 14rem;
  max-height: 70dvh;
  overflow-y: auto;
  overscroll-behavior: contain;
  padding: 0.75rem;
  border: 1px solid var(--dev-border);
  border-radius: 1rem;
  background: var(--dev-bg);
  color: var(--dev-text);
  font-family: var(--dev-sans);
  box-shadow: 0 25px 60px -15px rgb(0 0 0 / 0.6);
  transform-origin: bottom right;
}

.dev-menu:popover-open {
  opacity: 1;
  transform: scale(1);
  transition:
    opacity 150ms var(--ease-out-quint),
    transform 150ms var(--ease-out-quint);

  @starting-style {
    opacity: 0;
    transform: scale(0.95);
  }
}

.dev-menu__label {
  margin: 0.75rem 0 0.375rem;
  font: 700 0.625rem var(--dev-mono);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--dev-text-faint);
}

.dev-menu__label:first-child {
  margin-top: 0;
}

.dev-menu form {
  display: contents;
}

.dev-menu__item {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  width: 100%;
  margin-top: 0.25rem;
  padding: 0.4375rem 0.625rem;
  border: 0;
  border-radius: 0.5rem;
  background: var(--dev-hover);
  color: var(--dev-text);
  font: 500 0.8125rem var(--dev-sans);
  text-align: left;
  cursor: pointer;
  user-select: none;
  -webkit-tap-highlight-color: transparent;
  transition:
    background-color 150ms ease,
    transform 150ms var(--ease-out-quint);
}

@media (hover: hover) and (pointer: fine) {
  .dev-menu__item:hover {
    background: var(--dev-pressed);
  }
}

.dev-menu__item:active {
  background: var(--dev-pressed);
  transform: scale(0.98);
}

.dev-menu__item:focus-visible {
  outline: 2px solid var(--dev-accent);
  outline-offset: -2px;
}

.dev-menu__item-label {
  flex: 1;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.dev-menu__item-hint {
  width: 100%;
  color: var(--dev-text-muted);
  font: 400 0.6875rem/1.35 var(--dev-sans);
}

.dev-menu .dev-badge {
  flex-shrink: 0;
}

/* Panel — full page by default; the dialog context overrides below. */

.dev-mailbox,
.dev-mailbox *,
.dev-mailbox *::before,
.dev-mailbox *::after {
  box-sizing: border-box;
}

.dev-mailbox {
  container: dev-mailbox / inline-size;
  display: flex;
  flex-direction: column;
  height: 100dvh;
  background: var(--dev-bg);
  color: var(--dev-text);
  font-family: var(--dev-sans);
  font-size: 0.875rem;
  line-height: 1.4;
}

.dev-mailbox__bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  min-height: 3rem;
  padding: 0.375rem 0.625rem;
  border-bottom: 1px solid var(--dev-border);
  flex-shrink: 0;
}

.dev-mailbox__brand {
  display: flex;
  align-items: center;
  gap: 0.375rem;
  margin: 0 0 0 0.375rem;
  font: 700 0.6875rem var(--dev-mono);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--dev-accent);
}

.dev-icon {
  width: 0.875rem;
  height: 0.875rem;
  flex-shrink: 0;
}

.dev-mailbox__actions {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.dev-mailbox__actions form {
  display: contents;
}

.dev-mailbox__button {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  appearance: none;
  border: 0;
  background: transparent;
  color: var(--dev-text-muted);
  font: 500 0.75rem var(--dev-mono);
  padding: 0.5rem 0.625rem;
  border-radius: 0.5rem;
  cursor: pointer;
  user-select: none;
  -webkit-tap-highlight-color: transparent;
  text-decoration: none;
  transition:
    transform 150ms var(--ease-out-quint),
    background-color 150ms ease,
    color 150ms ease;
}

/* Small visual, 44px hit area. */
.dev-mailbox__button::after {
  content: "";
  position: absolute;
  inset: -6px;
}

@media (hover: hover) and (pointer: fine) {
  .dev-mailbox__button:hover {
    background: var(--dev-hover);
    color: var(--dev-text);
  }

  .dev-mailbox__button--danger:hover {
    color: var(--dev-danger);
  }
}

.dev-mailbox__button:active {
  transform: scale(0.94);
  background: var(--dev-pressed);
  color: var(--dev-text);
}

.dev-mailbox__button--danger:active {
  color: var(--dev-danger);
}

/* Expand and close only make sense inside the dialog. */
.dev-mailbox__button--expand,
.dev-mailbox__button--close {
  display: none;
}

.dev-mailbox-dialog .dev-mailbox__button--expand,
.dev-mailbox-dialog .dev-mailbox__button--close {
  display: inline-block;
}

.dev-icon--minimize {
  display: none;
}

.dev-mailbox-dialog--expanded .dev-icon--maximize {
  display: none;
}

.dev-mailbox-dialog--expanded .dev-icon--minimize {
  display: block;
}

.dev-mailbox__body {
  flex: 1;
  display: flex;
  min-height: 0;
  view-transition-name: dev-mailbox-body;
}

.dev-mailbox__pane {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-width: 0;
  min-height: 0;
}

/* One pane at a time when narrow; the wide container query below reveals both. */
.dev-mailbox__pane--content {
  display: none;
}

.dev-mailbox__body--detail .dev-mailbox__pane--list {
  display: none;
}

.dev-mailbox__body--detail .dev-mailbox__pane--content {
  display: flex;
}

.dev-mailbox__brand--wide {
  display: none;
}

/* Inbox */

.dev-mailbox__list {
  flex: 1;
  margin: 0;
  padding: 0 0 env(safe-area-inset-bottom);
  list-style: none;
  overflow-y: auto;
  overscroll-behavior: contain;
}

.dev-mailbox__list li + li {
  border-top: 1px solid var(--dev-border);
}

.dev-mailbox__row {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  min-height: 3.5rem;
  padding: 0.625rem 1rem;
  color: inherit;
  text-decoration: none;
  user-select: none;
  -webkit-tap-highlight-color: transparent;
  transition: background-color 150ms ease;
}

@media (hover: hover) and (pointer: fine) {
  .dev-mailbox__row:hover {
    background: var(--dev-hover);
  }
}

.dev-mailbox__row:active {
  background: var(--dev-pressed);
}

.dev-mailbox__row--selected {
  background: var(--dev-hover);
  box-shadow: inset 2px 0 0 var(--dev-accent);
}

.dev-mailbox__dot {
  width: 0.375rem;
  height: 0.375rem;
  border-radius: 50%;
  flex-shrink: 0;
}

.dev-mailbox__row--unread .dev-mailbox__dot {
  background: var(--dev-accent);
}

.dev-mailbox__row-main {
  flex: 1;
  min-width: 0;
}

.dev-mailbox__subject {
  display: block;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  color: var(--dev-text-muted);
}

.dev-mailbox__row--unread .dev-mailbox__subject {
  color: var(--dev-text);
  font-weight: 600;
}

.dev-mailbox__recipients {
  display: block;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-size: 0.75rem;
  color: var(--dev-text-faint);
}

.dev-mailbox__time {
  flex-shrink: 0;
  font: 400 0.6875rem var(--dev-mono);
  color: var(--dev-text-faint);
}

.dev-mailbox__empty,
.dev-mailbox__placeholder {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.625rem;
  margin: 0;
  font: 400 0.75rem var(--dev-mono);
  color: var(--dev-text-faint);
}

.dev-mailbox__empty .dev-icon,
.dev-mailbox__placeholder .dev-icon {
  width: 1.5rem;
  height: 1.5rem;
  opacity: 0.6;
}

/* Email */

.dev-mailbox__meta {
  flex-shrink: 0;
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--dev-border);
}

.dev-mailbox__meta-subject {
  margin: 0;
  font-size: 0.9375rem;
  font-weight: 600;
}

.dev-mailbox__meta-line {
  margin: 0.25rem 0 0;
  font: 400 0.6875rem var(--dev-mono);
  color: var(--dev-text-muted);
}

.dev-mailbox__html {
  flex: 1;
  width: 100%;
  border: 0;
  background: #fff;
}

.dev-mailbox__text {
  flex: 1;
  margin: 0;
  padding: 0.75rem 1rem env(safe-area-inset-bottom);
  overflow: auto;
  overscroll-behavior: contain;
  font: 400 0.8125rem var(--dev-mono);
  white-space: pre-wrap;
  color: var(--dev-text-muted);
}

/* Split view — list and reading pane side by side when the panel is wide enough. */

@container dev-mailbox (min-width: 44rem) {
  .dev-mailbox__pane--list,
  .dev-mailbox__body--detail .dev-mailbox__pane--list {
    display: flex;
    flex: none;
    width: min(18rem, 40cqi);
    border-right: 1px solid var(--dev-border);
  }

  .dev-mailbox__pane--content,
  .dev-mailbox__body--detail .dev-mailbox__pane--content {
    display: flex;
  }

  .dev-mailbox__button--back {
    display: none;
  }

  .dev-mailbox__brand--wide {
    display: flex;
  }

  /* Only the reading pane slides in split view; the list stays put. */
  .dev-mailbox__body {
    view-transition-name: none;
  }

  .dev-mailbox__pane--content {
    view-transition-name: dev-mailbox-body;
  }
}

.dev-mailbox__button:focus-visible,
.dev-mailbox__row:focus-visible {
  outline: 2px solid var(--dev-accent);
  outline-offset: -2px;
}

/* Dialog — compact panel that can expand in place. */

.dev-mailbox-dialog {
  margin: auto;
  padding: 0;
  border: 0;
  background: transparent;
  width: min(40rem, calc(100vw - 2rem));
  height: min(85dvh, 44rem);
  max-width: 100vw;
  max-height: 100dvh;
  overflow: visible;
  opacity: 0;
  transform: scale(0.97) translateY(0.5rem);
  transition:
    opacity 150ms var(--ease-out-quint),
    transform 150ms var(--ease-out-quint),
    width 300ms var(--ease-in-out-quart),
    height 300ms var(--ease-in-out-quart),
    overlay 150ms allow-discrete,
    display 150ms allow-discrete;
}

.dev-mailbox-dialog[open] {
  opacity: 1;
  transform: scale(1) translateY(0);
  transition:
    opacity 220ms var(--ease-out-quint),
    transform 220ms var(--ease-out-quint),
    width 300ms var(--ease-in-out-quart),
    height 300ms var(--ease-in-out-quart),
    overlay 220ms allow-discrete,
    display 220ms allow-discrete;

  @starting-style {
    opacity: 0;
    transform: scale(0.97) translateY(0.5rem);
  }
}

.dev-mailbox-dialog:focus-visible {
  outline: none;
}

.dev-mailbox-dialog--expanded {
  width: calc(100vw - 1.5rem);
  height: calc(100dvh - 1.5rem);
}

.dev-mailbox-dialog .dev-mailbox {
  height: 100%;
  border: 1px solid var(--dev-border);
  border-radius: 1rem;
  overflow: hidden;
  box-shadow: 0 25px 60px -15px rgb(0 0 0 / 0.6);
}

.dev-mailbox-dialog::backdrop {
  background: rgb(0 0 0 / 0.55);
  opacity: 0;
  transition:
    opacity 150ms ease,
    overlay 150ms allow-discrete,
    display 150ms allow-discrete;
}

.dev-mailbox-dialog[open]::backdrop {
  opacity: 1;
  transition:
    opacity 220ms ease,
    overlay 220ms allow-discrete,
    display 220ms allow-discrete;

  @starting-style {
    opacity: 0;
  }
}

/* iOS-style push/pop between inbox and email. dev_mailbox_slide_controller sets
   data-mailbox-slide on <html> for the duration of the view transition. */

html[data-mailbox-slide]::view-transition-group(dev-mailbox-body) {
  overflow: clip;
}

html[data-mailbox-slide="push"]::view-transition-old(dev-mailbox-body) {
  animation: 250ms cubic-bezier(0.32, 0.72, 0, 1) both dev-mailbox-recede;
}

html[data-mailbox-slide="push"]::view-transition-new(dev-mailbox-body) {
  animation: 250ms cubic-bezier(0.32, 0.72, 0, 1) both dev-mailbox-push-in;
}

html[data-mailbox-slide="pop"]::view-transition-old(dev-mailbox-body) {
  animation: 250ms cubic-bezier(0.32, 0.72, 0, 1) both dev-mailbox-pop-out;
  z-index: 1;
}

html[data-mailbox-slide="pop"]::view-transition-new(dev-mailbox-body) {
  animation: 250ms cubic-bezier(0.32, 0.72, 0, 1) both dev-mailbox-return;
}

@keyframes dev-mailbox-push-in {
  from { transform: translateX(100%); }
}

@keyframes dev-mailbox-recede {
  to { transform: translateX(-28%); opacity: 0.5; }
}

@keyframes dev-mailbox-pop-out {
  to { transform: translateX(100%); }
}

@keyframes dev-mailbox-return {
  from { transform: translateX(-28%); opacity: 0.5; }
}

@media (prefers-reduced-motion: reduce) {
  .dev-mailbox-dialog,
  .dev-mailbox-dialog[open] {
    transform: none;
    transition:
      opacity 150ms ease,
      overlay 150ms allow-discrete,
      display 150ms allow-discrete;
  }

  .dev-menu:popover-open {
    transform: none;
    transition: opacity 150ms ease;
  }

  .dev-mailbox__button:active,
  .dev-menu__item:active,
  .dev-trigger:active {
    transform: none;
  }
}