/* The email authentication tools: SPF, DMARC, DKIM, MTA-STS, BIMI and headers. The shell, rail, verdict, history,
   targets, code windows and ads are design system components; this file holds only what these tools show. */

/* The sample banner: says what is on screen and how to replace it. */
.mail-example { margin: 0; padding: var(--tb-space-2) var(--tb-space-3); border: 1px solid var(--tb-border-subtle); background: var(--tb-surface-inset); border-radius: var(--tb-radius-control); font-size: var(--tb-font-size-sm); line-height: var(--tb-leading-normal); color: var(--tb-text-body); }
.mail-example b { margin-right: var(--tb-space-1); color: var(--tb-text-strong); }
.mail-loading { color: var(--tb-text-muted); }
@media (prefers-reduced-motion: no-preference) { .mail-loading { animation: mail-breathe 1.2s var(--tb-ease-out) infinite alternate; } }
@keyframes mail-breathe { from { opacity: 1; } to { opacity: 0.45; } }
#result[aria-busy="true"] > :not(.tb-verdict) { opacity: 0.45; transition: opacity var(--tb-duration-base) var(--tb-ease-out); }
.mail-lede { margin: 0; max-width: var(--tb-layout-measure); font-size: var(--tb-font-size-sm); line-height: var(--tb-leading-relaxed); color: var(--tb-text-body); }
.mail-dnsname { font: var(--tb-font-size-xs) var(--tb-font-mono); color: var(--tb-text-muted); overflow-wrap: anywhere; }
.mail-optional { font-weight: var(--tb-weight-regular); color: var(--tb-text-muted); }
.mail-actions { display: flex; flex-wrap: wrap; align-items: center; gap: var(--tb-space-2) var(--tb-space-3); }
.mail-actions .tb-field__hint { margin: 0; }
.mail-selector { display: grid; grid-template-columns: minmax(0, 1fr); gap: var(--tb-space-2); }

/* Check the rest: the sibling checks, the current one marked. Navigation, so plain links. */
.mail-next { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: var(--tb-space-1); }
.mail-next__link { display: grid; place-items: center; min-height: var(--tb-control-sm); padding: 0 var(--tb-space-1); border: 1px solid var(--tb-border-subtle); border-radius: var(--tb-radius-control); background: var(--tb-surface-card); color: var(--tb-text-strong); font-size: var(--tb-font-size-xs); font-weight: var(--tb-weight-medium); text-decoration: none; }
.mail-next__link:hover { border-color: var(--tb-border-default); background: var(--tb-surface-hover); color: var(--tb-text-strong); }
.mail-next__link:focus-visible { outline: 2px solid var(--tb-focus-ring); outline-offset: 2px; }
.mail-next__link[aria-current="page"] { border-color: var(--tb-border-control); background: var(--tb-surface-raised); box-shadow: inset 0 0 0 1px var(--tb-border-control); }

/* Findings: worst first. The badge and the title say the result; the detail says what it means; the fix is a button. */
.mail-findings { list-style: none; display: grid; margin: 0; padding: 0; }
.mail-findings__none { padding: var(--tb-space-3) 0; font-size: var(--tb-font-size-sm); color: var(--tb-text-muted); }
.mail-finding { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: var(--tb-space-3); align-items: start; padding: var(--tb-space-3) 0; border-top: 1px solid var(--tb-border-subtle); }
.mail-finding__body { display: grid; gap: var(--tb-space-1); min-width: 0; }
.mail-finding__title { margin: 0; font-size: var(--tb-font-size-sm); font-weight: var(--tb-weight-semibold); color: var(--tb-text-strong); overflow-wrap: anywhere; }
.mail-finding__title .tb-badge { margin-right: var(--tb-space-1); vertical-align: 1px; }
.mail-finding__detail, .mail-finding__fix { margin: 0; font-size: var(--tb-font-size-xs); line-height: var(--tb-leading-relaxed); color: var(--tb-text-body); max-width: var(--tb-layout-measure); }
.mail-finding__fix { color: var(--tb-text-strong); }
.mail-finding[data-status="pass"] .mail-finding__title { font-weight: var(--tb-weight-medium); }

/* The record, term by term: the value column is the record text. */
.mail-anatomy { --_key: 8rem; }
.mail-anatomy__value { padding-right: var(--tb-space-3); font: var(--tb-font-size-xs) / var(--tb-leading-normal) var(--tb-font-mono); color: var(--tb-text-strong); overflow-wrap: anywhere; }
.mail-anatomy .tb-kv__meaning { width: 40%; }

/* Fact tiles: the few numbers that decide the verdict, large, with what they are under them. */
.mail-facts { display: grid; grid-template-columns: repeat(auto-fit, minmax(8rem, 1fr)); gap: var(--tb-space-2); margin: 0; }
.mail-facts > div { display: grid; gap: var(--tb-space-1); align-content: start; padding: var(--tb-space-3); border: 1px solid var(--tb-border-subtle); border-radius: var(--tb-radius-control); background: var(--tb-surface-card); min-width: 0; }
.mail-facts dt { order: 2; font-size: var(--tb-font-size-xs); color: var(--tb-text-muted); }
.mail-facts dd { margin: 0; font: var(--tb-weight-semibold) var(--tb-font-size-lg) / var(--tb-leading-snug) var(--tb-font-sans); color: var(--tb-text-strong); overflow-wrap: anywhere; }
.mail-facts dd[data-mono] { font: var(--tb-font-size-xs) / var(--tb-leading-normal) var(--tb-font-mono); font-weight: var(--tb-weight-regular); }
.mail-facts > div[data-status="fail"] { border-color: var(--tb-status-danger-border); background: var(--tb-status-danger-bg); }
.mail-facts > div[data-status="warn"] { border-color: var(--tb-status-warning-border); background: var(--tb-status-warning-bg); }
.mail-facts > div[data-wide] { grid-column: 1 / -1; }

/* DKIM discovery: selectors that answered get rows; the rest are named in one muted line. */
.mail-discovery__rest { padding: var(--tb-space-2) 0; border-top: 1px solid var(--tb-border-subtle); font-size: var(--tb-font-size-xs); line-height: var(--tb-leading-relaxed); color: var(--tb-text-muted); }

/* SPF lookup budget: one slot per lookup, in the order receivers make them. Past the tenth, slots turn red. */
.mail-budget { display: grid; grid-template-columns: auto minmax(0, 1fr); gap: var(--tb-space-4); align-items: center; }
.mail-budget__count { display: grid; margin: 0; }
.mail-budget__count b { font: var(--tb-weight-semibold) var(--tb-font-size-4xl) / 1 var(--tb-font-sans); letter-spacing: var(--tb-tracking-display); font-variant-numeric: tabular-nums; color: var(--tb-text-strong); }
.mail-budget__count[data-over] b { color: var(--tb-status-danger-fg); }
.mail-budget__count span { font-size: var(--tb-font-size-xs); color: var(--tb-text-muted); }
.mail-budget__slots { list-style: none; display: grid; grid-template-columns: repeat(auto-fill, minmax(var(--tb-control-lg), 1fr)); gap: var(--tb-space-1); margin: 0; padding: 0; }
.mail-budget__slots li { display: grid; place-items: center; gap: 0; min-height: var(--tb-control-lg); padding: var(--tb-space-1) 0; border: 1px solid var(--tb-border-default); border-radius: var(--tb-radius-control); background: var(--tb-surface-card); font: var(--tb-font-size-2xs) / 1.2 var(--tb-font-mono); color: var(--tb-text-muted); }
.mail-budget__slots li b { font: var(--tb-weight-semibold) var(--tb-font-size-sm) var(--tb-font-sans); color: var(--tb-text-strong); }
.mail-budget__slots li[data-over] { border-color: var(--tb-status-danger-border); background: var(--tb-status-danger-bg); color: var(--tb-status-danger-fg); }
.mail-budget__slots li[data-over] b { color: var(--tb-status-danger-fg); }
.mail-budget__slots li[data-empty] { border-style: dashed; background: transparent; }
.mail-budget__slots li[data-limit] { box-shadow: inset -2px 0 0 var(--tb-text-strong); }

/* SPF include tree: each record a receiver reads, indented under the include that reaches it. */
.mail-tree, .mail-tree ol { list-style: none; margin: 0; padding: 0; display: grid; gap: var(--tb-space-1); }
.mail-tree ol { margin: var(--tb-space-1) 0 0 var(--tb-space-3); padding-left: var(--tb-space-3); border-left: 1px solid var(--tb-border-default); }
.mail-node { display: grid; gap: 2px; padding: var(--tb-space-2) var(--tb-space-3); border: 1px solid var(--tb-border-subtle); border-radius: var(--tb-radius-control); background: var(--tb-surface-card); min-width: 0; }
.mail-node[data-status="fail"] { border-color: var(--tb-status-danger-border); }
.mail-node__head { display: flex; flex-wrap: wrap; align-items: baseline; gap: var(--tb-space-1) var(--tb-space-2); }
.mail-node__name { font: var(--tb-weight-semibold) var(--tb-font-size-xs) var(--tb-font-mono); color: var(--tb-text-strong); overflow-wrap: anywhere; }
.mail-node__cost { font: var(--tb-font-size-2xs) var(--tb-font-mono); color: var(--tb-text-muted); }
.mail-node__record { margin: 0; font: var(--tb-font-size-2xs) / var(--tb-leading-normal) var(--tb-font-mono); color: var(--tb-text-body); overflow-wrap: anywhere; }
.mail-node__error { margin: 0; font-size: var(--tb-font-size-xs); color: var(--tb-status-danger-fg); }

/* SPF flattening plan: what to flatten and what to keep, one line each. */
.mail-plan { list-style: none; display: grid; gap: var(--tb-space-1); margin: 0; padding: 0; }
.mail-plan li { display: grid; grid-template-columns: auto minmax(0, 1fr) auto; gap: var(--tb-space-2); align-items: baseline; padding: var(--tb-space-2) 0; border-top: 1px solid var(--tb-border-subtle); font-size: var(--tb-font-size-xs); }
.mail-plan b { font-family: var(--tb-font-mono); font-weight: var(--tb-weight-medium); color: var(--tb-text-strong); overflow-wrap: anywhere; }
.mail-plan span:last-child { color: var(--tb-text-muted); text-align: right; }

/* DMARC: the path to enforcement as target cards, and the builder as a form grid. */
.mail-steps { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: var(--tb-space-2); }
.mail-steps .tb-target__value { font-family: var(--tb-font-sans); }
.mail-steps .tb-target__value > span:first-child { font-weight: var(--tb-weight-semibold); }
.mail-steps .tb-target__value > span + span { font-family: var(--tb-font-mono); }
.mail-form { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: var(--tb-space-3); }
.mail-form__field { display: grid; gap: var(--tb-space-1); min-width: 0; }
.mail-form__field--wide { grid-column: span 3; }
.mail-form .tb-input, .mail-form .tb-select { height: var(--tb-control-md); }

/* MTA-STS and BIMI: the chain of things that must all hold, in the order a sender checks them. */
.mail-chain { list-style: none; display: grid; margin: 0; padding: 0; counter-reset: step; }
.mail-chain > li { position: relative; display: grid; grid-template-columns: var(--tb-control-sm) minmax(0, 1fr); gap: var(--tb-space-1) var(--tb-space-3); padding: 0 0 var(--tb-space-4); counter-increment: step; }
.mail-chain > li::before { content: counter(step); display: grid; place-items: center; width: var(--tb-control-sm); height: var(--tb-control-sm); border: 1px solid var(--tb-border-default); border-radius: var(--tb-radius-full); background: var(--tb-surface-card); font: var(--tb-weight-semibold) var(--tb-font-size-xs) var(--tb-font-sans); color: var(--tb-text-strong); }
.mail-chain > li:not(:last-child)::after { content: ""; position: absolute; top: var(--tb-control-sm); bottom: 0; left: calc(var(--tb-control-sm) / 2); border-left: 1px solid var(--tb-border-default); }
.mail-chain > li[data-status="fail"]::before { border-color: var(--tb-status-danger-border); background: var(--tb-status-danger-bg); color: var(--tb-status-danger-fg); }
.mail-chain > li[data-status="pass"]::before { border-color: var(--tb-status-success-border); background: var(--tb-status-success-bg); color: var(--tb-status-success-fg); }
.mail-chain > li[data-status="warn"]::before { border-color: var(--tb-status-warning-border); background: var(--tb-status-warning-bg); color: var(--tb-status-warning-fg); }
.mail-step { display: grid; gap: var(--tb-space-1); min-width: 0; padding-top: var(--tb-space-1); }
.mail-step__title { margin: 0; font-size: var(--tb-font-size-sm); font-weight: var(--tb-weight-semibold); color: var(--tb-text-strong); }
.mail-step__title .tb-badge { margin-left: var(--tb-space-2); vertical-align: 1px; }
.mail-step__detail { margin: 0; font-size: var(--tb-font-size-xs); line-height: var(--tb-leading-relaxed); color: var(--tb-text-body); max-width: var(--tb-layout-measure); }
.mail-step__value { margin: 0; padding: var(--tb-space-2) var(--tb-space-3); border-radius: var(--tb-radius-control); background: var(--tb-surface-code); font: var(--tb-font-size-xs) / var(--tb-leading-normal) var(--tb-font-mono); color: var(--tb-text-strong); white-space: pre-wrap; overflow-wrap: anywhere; }
.mail-table-wrap { overflow-x: auto; }
.mail-table { width: 100%; border-collapse: collapse; font: var(--tb-font-size-xs) / var(--tb-leading-normal) var(--tb-font-mono); }
.mail-table th { padding: 0 var(--tb-space-3) var(--tb-space-1) 0; font: var(--tb-font-size-2xs) var(--tb-font-sans); color: var(--tb-text-muted); text-align: left; }
.mail-table td { padding: var(--tb-space-2) var(--tb-space-3) var(--tb-space-2) 0; border-top: 1px solid var(--tb-border-subtle); color: var(--tb-text-strong); overflow-wrap: anywhere; }
.mail-table td:last-child { white-space: nowrap; }

/* BIMI: the logo where inboxes put it: a circle avatar in a list, a large header avatar, on both grounds. */
.mail-inbox { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: var(--tb-space-2); }
.mail-inbox__ground { display: grid; gap: var(--tb-space-3); padding: var(--tb-space-4); border: 1px solid var(--tb-border-subtle); border-radius: var(--tb-radius-card); }
/* Each ground resolves the system colours in its own scheme, so both previews look right in either page mode. */
.mail-inbox__ground[data-ground="light"] { color-scheme: light; background: var(--tb-surface-raised); color: var(--tb-text-strong); }
.mail-inbox__ground[data-ground="dark"] { color-scheme: dark; background: var(--tb-surface-page); color: var(--tb-text-strong); }
.mail-inbox__row { display: grid; grid-template-columns: auto minmax(0, 1fr); gap: var(--tb-space-3); align-items: center; }
.mail-inbox__avatar { display: block; width: var(--tb-control-md); height: var(--tb-control-md); border-radius: var(--tb-radius-full); object-fit: cover; background: var(--tb-surface-subtle); box-shadow: 0 0 0 1px var(--tb-border-subtle); }
.mail-inbox__avatar[data-size="large"] { width: var(--tb-space-16); height: var(--tb-space-16); }
.mail-inbox__text { display: grid; gap: 2px; min-width: 0; font-size: var(--tb-font-size-xs); color: var(--tb-text-muted); }
.mail-inbox__text b { font-size: var(--tb-font-size-sm); color: var(--tb-text-strong); }
.mail-inbox__empty { grid-column: 1 / -1; margin: 0; padding: var(--tb-space-6); border: 1px dashed var(--tb-border-default); border-radius: var(--tb-radius-card); font-size: var(--tb-font-size-sm); color: var(--tb-text-muted); text-align: center; }

/* Headers: the route as a timeline. The bar shows how long each hop held the message, against the slowest. */
.mail-route { list-style: none; display: grid; margin: 0; padding: 0; }
.mail-hop { position: relative; display: grid; grid-template-columns: var(--tb-control-sm) minmax(0, 1fr); gap: var(--tb-space-1) var(--tb-space-3); padding-bottom: var(--tb-space-4); }
.mail-hop:not(:last-child)::after { content: ""; position: absolute; top: var(--tb-control-sm); bottom: 0; left: calc(var(--tb-control-sm) / 2); border-left: 1px solid var(--tb-border-default); }
.mail-hop__index { display: grid; place-items: center; width: var(--tb-control-sm); height: var(--tb-control-sm); border: 1px solid var(--tb-border-default); border-radius: var(--tb-radius-full); background: var(--tb-surface-card); font: var(--tb-weight-semibold) var(--tb-font-size-xs) var(--tb-font-sans); color: var(--tb-text-strong); }
.mail-hop__body { display: grid; gap: var(--tb-space-1); min-width: 0; padding-top: var(--tb-space-1); }
.mail-hop__path { margin: 0; font: var(--tb-font-size-xs) / var(--tb-leading-normal) var(--tb-font-mono); color: var(--tb-text-strong); overflow-wrap: anywhere; }
.mail-hop__path span { color: var(--tb-text-muted); }
.mail-hop__meta { display: flex; flex-wrap: wrap; align-items: center; gap: var(--tb-space-1) var(--tb-space-3); margin: 0; font-size: var(--tb-font-size-xs); color: var(--tb-text-muted); }
.mail-hop__meta code { font: var(--tb-font-size-xs) var(--tb-font-mono); color: var(--tb-text-body); }
.mail-hop__delay { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: var(--tb-space-2); align-items: center; }
.mail-hop__bar { height: var(--tb-space-1); width: var(--_share, 0%); min-width: 2px; border-radius: var(--tb-radius-full); background: var(--tb-text-muted); }
.mail-hop__delay b { font: var(--tb-weight-semibold) var(--tb-font-size-xs) var(--tb-font-mono); font-variant-numeric: tabular-nums; color: var(--tb-text-strong); }
.mail-hop[data-slow] .mail-hop__bar { background: var(--tb-status-warning-fg); }
.mail-hop[data-slow] .mail-hop__delay b { color: var(--tb-status-warning-fg); }
.mail-hop[data-skew] .mail-hop__delay b { color: var(--tb-status-danger-fg); }
.mail-hop__ip { font-size: var(--tb-font-size-xs); color: var(--tb-text-body); }

/* Headers: SPF, DKIM and DMARC as three results side by side, each with what it was checked against. */
.mail-auth { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: var(--tb-space-2); }
.mail-auth__item { display: grid; gap: var(--tb-space-1); align-content: start; padding: var(--tb-space-3); border: 1px solid var(--tb-border-subtle); border-radius: var(--tb-radius-control); background: var(--tb-surface-card); min-width: 0; }
.mail-auth__item[data-status="fail"] { border-color: var(--tb-status-danger-border); background: var(--tb-status-danger-bg); }
.mail-auth__name { display: flex; align-items: center; justify-content: space-between; gap: var(--tb-space-2); font-size: var(--tb-font-size-sm); font-weight: var(--tb-weight-semibold); color: var(--tb-text-strong); }
.mail-auth__detail { margin: 0; font: var(--tb-font-size-2xs) / var(--tb-leading-normal) var(--tb-font-mono); color: var(--tb-text-body); overflow-wrap: anywhere; }

/* Every header: name and value, filterable; long values wrap rather than scroll. */
.mail-headers { list-style: none; display: grid; margin: var(--tb-space-2) 0 0; padding: 0; max-height: 24rem; overflow-y: auto; overscroll-behavior: contain; }
.mail-headers li { display: grid; grid-template-columns: 11rem minmax(0, 1fr); gap: var(--tb-space-3); padding: var(--tb-space-1) 0; border-top: 1px solid var(--tb-border-subtle); font: var(--tb-font-size-2xs) / var(--tb-leading-normal) var(--tb-font-mono); }
.mail-headers b { font-weight: var(--tb-weight-medium); color: var(--tb-data-key); overflow-wrap: anywhere; }
.mail-headers span { color: var(--tb-text-strong); overflow-wrap: anywhere; }
.mail-headers mark { border-radius: 2px; }

@media (max-width: 60rem) {
  .mail-steps { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .mail-form { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .mail-form__field--wide { grid-column: 1 / -1; }
  .mail-auth { grid-template-columns: minmax(0, 1fr); }
  .mail-headers li { grid-template-columns: minmax(0, 1fr); gap: 0; }
}
@media (max-width: 40rem) {
  .mail-budget { grid-template-columns: minmax(0, 1fr); gap: var(--tb-space-2); }
  .mail-form { grid-template-columns: minmax(0, 1fr); }
  .mail-inbox { grid-template-columns: minmax(0, 1fr); }
  .mail-finding { grid-template-columns: minmax(0, 1fr); }
  .mail-next__link { min-height: var(--tb-control-touch); }
}

/* Empty and error states: only the verdict shows, so nothing stale sits under a new question. */
#result[data-state="empty"] > :not(.tb-verdict), #result[data-state="error"] > :not(.tb-verdict) { display: none; }