:root {
  color-scheme: dark;
  --bg: #111010;
  --bg-2: #171515;
  --panel: rgba(26, 24, 24, 0.9);
  --panel-strong: rgba(22, 20, 20, 0.98);
  --panel-soft: rgba(255, 255, 255, 0.03);
  --line: rgba(92, 87, 85, 0.24);
  --line-strong: rgba(92, 87, 85, 0.34);
  --text: #ede8e4;
  --muted: #9a9290;
  --accent: #ef4b4b;
  --accent-2: #6ea8fe;
  --warning: #ffd36a;
  --shadow: 0 30px 90px rgba(0, 0, 0, 0.46);
  --shadow-soft: 0 16px 36px rgba(0, 0, 0, 0.24);
  --radius-xl: 28px;
  --radius-lg: 22px;
  --radius-md: 16px;
  --radius-sm: 12px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--text);
  font:
    14px/1.4 Figtree,
    'Segoe UI',
    system-ui,
    sans-serif;
  background: linear-gradient(180deg, #131111 0%, #111010 100%);
}

body::before {
  content: '';
  position: fixed;
  inset: 0;
  pointer-events: none;
  opacity: 0.03;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.18) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.12) 1px, transparent 1px);
  background-size: 72px 72px;
  mask-image: radial-gradient(circle at center, black 10%, transparent 82%);
}

body::after {
  content: '';
  position: fixed;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.015), transparent 16%);
}

a {
  color: inherit;
}

button {
  font: inherit;
}

.mailbox-shell {
  position: relative;
  z-index: 1;
  width: min(1680px, calc(100vw - 24px));
  min-height: 100vh;
  margin: 0 auto;
  padding: 10px 0 10px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.app-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 1px 1px 0;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  text-decoration: none;
}

.brand-mark {
  width: 38px;
  height: 38px;
  display: grid;
  place-items: center;
  border-radius: 14px;
  color: #fff3f3;
  font-weight: 800;
  letter-spacing: 0.04em;
  background: linear-gradient(135deg, rgba(239, 75, 75, 0.98), rgba(184, 41, 41, 0.88));
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.34),
    var(--shadow-soft);
}

.brand-copy strong,
.column-head h1,
.detail-empty h2,
.detail-view h2 {
  display: block;
  font-family: 'Fraunces', Georgia, 'Iowan Old Style', serif;
  letter-spacing: -0.02em;
}

.brand-copy strong {
  font-size: 1rem;
  line-height: 1.05;
}

.brand-copy small {
  display: block;
  color: var(--muted);
  font-size: 0.72rem;
  margin-top: 2px;
}

.shell-nav {
  display: inline-flex;
  align-items: center;
  gap: 2px;
  padding: 3px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.02);
}

.shell-nav-link {
  min-height: 32px;
  display: inline-flex;
  align-items: center;
  padding: 0 12px;
  border-radius: 9px;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.01em;
  text-decoration: none;
}

.shell-nav-link--active {
  background: var(--accent);
  color: #fff;
}

.shell-nav-link--inactive {
  color: var(--muted);
}

.header-status {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 8px;
}

.shell-banner {
  display: flex;
  align-items: center;
  gap: 10px;
  min-height: 40px;
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.03);
  color: var(--text);
  box-shadow: var(--shadow-soft);
}

.shell-banner::before {
  content: 'Status';
  flex: 0 0 auto;
  padding: 4px 8px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.05);
  color: var(--muted);
  font-size: 0.7rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.shell-banner[data-tone='error'] {
  border-color: rgba(239, 75, 75, 0.24);
  background: rgba(239, 75, 75, 0.08);
  color: #ffd7d7;
}

.shell-banner[data-tone='error']::before {
  background: rgba(239, 75, 75, 0.16);
  color: #ffbdbd;
}

.shell-banner[data-tone='success'] {
  border-color: rgba(110, 168, 254, 0.22);
  background: rgba(110, 168, 254, 0.08);
  color: #dbe9ff;
}

.shell-banner[data-tone='success']::before {
  background: rgba(110, 168, 254, 0.18);
  color: #bdd4ff;
}

.status-chip,
.action-pill,
.meta-chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 28px;
  padding: 0 9px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.03);
  color: var(--muted);
  font-size: 0.74rem;
  letter-spacing: 0.01em;
}

.status-chip--accent {
  border-color: rgba(239, 75, 75, 0.24);
  color: var(--accent);
  background: rgba(239, 75, 75, 0.08);
}

.status-chip--soft {
  color: #c9d5e3;
}

.mailbox-grid {
  flex: 1;
  min-height: 0;
  display: grid;
  grid-template-columns: 240px minmax(320px, 410px) minmax(0, 1fr);
  gap: 10px;
}

.panel {
  min-height: 0;
  border: 1px solid var(--line);
  border-radius: 20px;
  background: var(--panel);
  backdrop-filter: blur(12px);
  box-shadow: 0 18px 42px rgba(0, 0, 0, 0.22);
}

.left-rail {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 14px;
  position: sticky;
  top: 16px;
  align-self: start;
}

.panel-head,
.column-head,
.detail-head,
.detail-foot,
.rail-note {
  display: flex;
  justify-content: space-between;
  gap: 10px;
}

.panel-head,
.rail-note {
  align-items: start;
  flex-direction: column;
}

.eyebrow {
  margin: 0;
  color: var(--muted);
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.panel-kicker,
.microcopy,
.detail-from,
.message-from,
.message-snippet,
.detail-body p,
.detail-empty p {
  color: var(--muted);
}

.panel-kicker {
  margin: 6px 0 0;
  font-size: 0.95rem;
}

.stack {
  display: grid;
  gap: 8px;
}

.action-button,
.detail-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 40px;
  padding: 0 12px;
  border-radius: 12px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.035);
  color: var(--text);
  cursor: pointer;
  transition:
    transform 160ms ease,
    border-color 160ms ease,
    background 160ms ease,
    color 160ms ease;
}

.action-button--primary {
  border-color: rgba(239, 75, 75, 0.24);
  background: linear-gradient(135deg, rgba(239, 75, 75, 0.16), rgba(239, 75, 75, 0.08));
}

.action-button:hover,
.detail-button:hover,
.message-row:hover,
.brand:hover .brand-mark {
  transform: translateY(-1px);
}

.action-button:hover,
.detail-button:hover {
  border-color: rgba(255, 255, 255, 0.24);
  background: rgba(255, 255, 255, 0.06);
}

.rail-note,
.rail-card {
  padding: 12px;
  border-radius: 16px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.02);
}

.rail-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.action-pill[aria-disabled='true'] {
  opacity: 0.6;
}

.mailbox-address {
  margin: 10px 0 8px;
  color: var(--accent);
  font-weight: 700;
  font-size: 0.98rem;
  word-break: break-all;
}

.status-copy {
  margin: 10px 0 8px;
  color: var(--text);
  font-size: 0.94rem;
}

.inbox-column,
.detail-column {
  display: flex;
  flex-direction: column;
  min-height: 0;
  overflow: hidden;
}

.inbox-column {
  padding: 18px;
}

.column-head {
  align-items: end;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line);
}

.column-head h1,
.detail-empty h2,
.detail-view h2 {
  margin: 4px 0 0;
  font-size: clamp(1.8rem, 3vw, 2.35rem);
  line-height: 0.98;
}

.message-list {
  flex: 1;
  min-height: 0;
  margin-top: 14px;
  display: grid;
  gap: 6px;
  overflow: auto;
  padding-right: 2px;
}

.message-row {
  display: flex;
  align-items: start;
  gap: 9px;
  width: 100%;
  padding: 11px 11px 10px;
  border-radius: 14px;
  border: 1px solid transparent;
  border-left-width: 2px;
  border-left-style: solid;
  background: rgba(255, 255, 255, 0.02);
  color: inherit;
  cursor: pointer;
  text-align: left;
  transition:
    transform 160ms ease,
    border-color 160ms ease,
    background 160ms ease,
    box-shadow 160ms ease;
}

.message-row.is-active {
  border-color: rgba(239, 75, 75, 0.22);
  border-left-color: var(--accent);
  background: linear-gradient(135deg, rgba(239, 75, 75, 0.12), rgba(239, 75, 75, 0.05));
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.05);
}

.message-row.is-unread {
  background: rgba(110, 168, 254, 0.045);
}

.message-row.is-selected {
  border-color: rgba(239, 75, 75, 0.24);
  border-left-color: var(--accent);
  background: linear-gradient(135deg, rgba(239, 75, 75, 0.12), rgba(239, 75, 75, 0.04));
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.04);
}

.message-dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  margin-top: 5px;
  background: rgba(160, 179, 198, 0.28);
  box-shadow: 0 0 0 4px rgba(255, 255, 255, 0.02);
  flex: 0 0 auto;
}

.message-dot.is-unread {
  background: var(--accent-2);
  box-shadow: 0 0 0 4px rgba(110, 168, 254, 0.12);
}

.message-meta {
  min-width: 0;
  flex: 1;
  display: grid;
  gap: 3px;
}

.message-topline {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
}

.message-topline strong,
.detail-from,
.detail-time {
  color: var(--text);
}

.message-topline strong {
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-size: 0.92rem;
}

.message-topline time,
.detail-time {
  flex: 0 0 auto;
  color: var(--muted);
  font-size: 0.72rem;
}

.message-from,
.message-snippet {
  display: -webkit-box;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.message-from {
  -webkit-line-clamp: 1;
  font-size: 0.76rem;
}

.message-snippet {
  -webkit-line-clamp: 1;
  font-size: 0.8rem;
}

.detail-column {
  padding: 14px;
}

.detail-shell {
  flex: 1;
  min-height: 0;
  display: grid;
}

.detail-empty,
.detail-view {
  min-height: 100%;
  border-radius: calc(var(--radius-xl) - 6px);
  border: 1px solid var(--line);
  background:
    radial-gradient(circle at top right, rgba(239, 75, 75, 0.08), transparent 28%),
    radial-gradient(circle at bottom left, rgba(110, 168, 254, 0.06), transparent 26%),
    var(--panel-strong);
}

.detail-empty {
  display: grid;
  align-content: center;
  justify-items: start;
  gap: 10px;
  padding: 28px;
}

.detail-empty p,
.detail-view p {
  margin: 0;
}

.detail-view {
  display: grid;
  grid-template-rows: auto auto auto minmax(0, 1fr) auto;
  padding: 18px;
  gap: 14px;
  overflow: hidden;
}

.detail-head {
  align-items: start;
  border-bottom: 1px solid var(--line);
  padding-bottom: 12px;
}

.detail-title-group {
  min-width: 0;
}

.detail-back {
  display: none;
  align-items: center;
  gap: 6px;
  margin: 0 0 8px;
  padding: 0;
  border: 0;
  background: transparent;
  color: var(--accent-2);
  font-size: 0.8rem;
  font-weight: 600;
  cursor: pointer;
}

.detail-back:hover {
  color: #91bcff;
}

.detail-primary {
  display: grid;
  gap: 10px;
}

.detail-primary-grid {
  display: grid;
  gap: 10px;
  grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
}

.verification-card,
.verification-mini-action {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.02);
  color: var(--text);
  cursor: pointer;
  transition:
    transform 160ms ease,
    border-color 160ms ease,
    background 160ms ease,
    box-shadow 160ms ease;
}

.verification-card:hover,
.verification-mini-action:hover {
  transform: translateY(-1px);
  border-color: rgba(255, 255, 255, 0.16);
}

.verification-card {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px;
}

.verification-card--link {
  background: linear-gradient(135deg, rgba(239, 75, 75, 0.12), rgba(239, 75, 75, 0.05));
  border-color: rgba(239, 75, 75, 0.22);
}

.verification-card--code {
  align-items: stretch;
  background: linear-gradient(135deg, rgba(110, 168, 254, 0.1), rgba(110, 168, 254, 0.04));
  border-color: rgba(110, 168, 254, 0.2);
}

.verification-card-icon {
  width: 32px;
  height: 32px;
  flex: 0 0 auto;
  display: grid;
  place-items: center;
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.06);
  color: var(--accent);
  font-size: 1rem;
}

.verification-card-body {
  min-width: 0;
  flex: 1;
  display: grid;
  gap: 2px;
}

.verification-card-meta {
  flex: 0 0 auto;
  align-self: center;
  display: grid;
  justify-items: end;
  gap: 8px;
}

.verification-card-kicker,
.verification-card-hint,
.verification-secondary-title {
  color: var(--muted);
  font-size: 0.68rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.verification-card-title {
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-size: 0.88rem;
  font-weight: 600;
}

.verification-card-title--code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  letter-spacing: 0.02em;
  white-space: normal;
  overflow-wrap: anywhere;
}

.verification-card-hint {
  margin-top: 2px;
  letter-spacing: 0.08em;
}

.verification-card--code {
  justify-content: space-between;
}

.verification-card-action {
  flex: 0 0 auto;
  align-self: center;
  padding: 7px 9px;
  border-radius: 999px;
  border: 1px solid rgba(110, 168, 254, 0.24);
  background: rgba(255, 255, 255, 0.03);
  color: var(--accent-2);
  font-size: 0.75rem;
  font-weight: 600;
}

.verification-secondary-group {
  padding: 12px;
  border-radius: 14px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.015);
}

.verification-secondary-list {
  margin-top: 8px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.verification-mini-action {
  display: grid;
  gap: 4px;
  align-content: start;
  text-align: left;
  padding: 10px 11px;
  min-width: 0;
}

.verification-mini-action--link {
  border-color: rgba(239, 75, 75, 0.18);
  background: rgba(239, 75, 75, 0.05);
}

.verification-mini-action--code {
  border-color: rgba(110, 168, 254, 0.18);
  background: rgba(110, 168, 254, 0.05);
}

.verification-mini-action-label {
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-size: 0.86rem;
  font-weight: 600;
}

.verification-mini-action-hint {
  color: var(--muted);
  font-size: 0.72rem;
}

.detail-title-group h2 {
  font-size: clamp(1.55rem, 2.1vw, 2.1rem);
}

.detail-from {
  margin-top: 6px;
  font-size: 0.88rem;
}

.detail-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.detail-body {
  overflow: auto;
  padding-right: 2px;
  color: #d9e4ef;
  line-height: 1.65;
}

.detail-body p {
  max-width: 64ch;
}

.detail-foot {
  align-items: center;
  flex-wrap: wrap;
  border-top: 1px solid var(--line);
  padding-top: 12px;
}

.page-footer {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  padding: 0 6px 2px;
  color: var(--muted);
  font-size: 0.84rem;
}

template {
  display: none;
}

@media (max-width: 1180px) {
  .mailbox-grid {
    grid-template-columns: 220px minmax(0, 1fr);
    grid-template-areas:
      'rail inbox'
      'detail detail';
  }

  .left-rail {
    position: static;
    grid-area: rail;
  }

  .inbox-column {
    grid-area: inbox;
  }

  .detail-column {
    grid-area: detail;
    min-height: 420px;
  }
}

@media (max-width: 840px) {
  .mailbox-shell {
    width: min(100vw, calc(100vw - 16px));
    padding-top: 8px;
  }

  .app-header,
  .column-head,
  .detail-head,
  .page-footer {
    flex-direction: column;
    align-items: start;
  }

  .header-status {
    justify-content: flex-start;
  }

  .mailbox-grid {
    grid-template-columns: 1fr;
    grid-template-areas:
      'rail'
      'inbox'
      'detail';
  }

  .left-rail,
  .inbox-column,
  .detail-column {
    padding: 12px;
  }

  .stack {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .action-button {
    min-height: 44px;
  }

  .rail-note,
  .rail-card,
  .detail-view,
  .detail-empty {
    border-radius: 16px;
  }

  .detail-column {
    min-height: 360px;
  }

  .mailbox-shell[data-mailbox-mobile-view='detail'] .left-rail,
  .mailbox-shell[data-mailbox-mobile-view='detail'] .inbox-column {
    display: none;
  }

  .mailbox-shell[data-mailbox-mobile-view='inbox'] .detail-column {
    display: none;
  }

  .mailbox-shell[data-mailbox-mobile-view='detail'] .detail-column {
    display: flex;
    min-height: 0;
  }

  .mailbox-shell[data-mailbox-mobile-view='detail'] .detail-back {
    display: inline-flex;
  }

  .verification-card {
    padding: 11px;
  }

  .detail-primary-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 560px) {
  .stack {
    grid-template-columns: 1fr;
  }

  .message-row {
    padding: 10px;
  }

  .message-topline {
    flex-direction: column;
    align-items: start;
    gap: 2px;
  }

  .detail-view {
    padding: 16px;
  }
}

@media (prefers-reduced-motion: no-preference) {
  .panel,
  .status-chip,
  .action-button,
  .detail-button,
  .message-row,
  .brand-mark {
    animation: rise 600ms ease both;
  }

  .left-rail {
    animation-delay: 60ms;
  }

  .inbox-column {
    animation-delay: 120ms;
  }

  .detail-column {
    animation-delay: 180ms;
  }

  @keyframes rise {
    from {
      opacity: 0;
      transform: translateY(10px);
    }

    to {
      opacity: 1;
      transform: translateY(0);
    }
  }
}