/* NHMail: the NorthHead "Chartroom" look (paper, ink rail, harbour blue), system fonts. */
:root {
  --paper: #f3f1ea;
  --card: #fffdf8;
  --ink: #13261f;
  --rail: #13261f;
  --rail-ink: #e9efe9;
  --rail-muted: #9fb0a8;
  --harbour: #1f4f7a;
  --muted: #5d6b64;
  --rule: #ddd6c6;
  --warn-bg: #fbe9e3;
  --warn-ink: #8a2a1b;
  --ok: #2f6b57;
  --hello: #1f4f7a;
  --info: #2f6b57;
  --sales: #9a3324;
  --other: #6b6558;
}
@media (prefers-color-scheme: dark) {
  :root {
    --paper: #0f1a16;
    --card: #15241e;
    --ink: #e9efe9;
    --rail: #0a120f;
    --harbour: #8dbbe3;
    --muted: #9fb0a8;
    --rule: #2a3a33;
    --warn-bg: #3a1d17;
    --warn-ink: #f3b3a2;
    --ok: #7fc4a8;
    --hello: #8dbbe3;
    --info: #7fc4a8;
    --sales: #f0a08a;
    --other: #b8b09f;
  }
}
* {
  box-sizing: border-box;
}
/* Buttons set display, which would otherwise beat the hidden attribute. */
[hidden] {
  display: none !important;
}
html {
  -webkit-text-size-adjust: 100%;
}
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font:
    15px/1.5 system-ui,
    -apple-system,
    "Segoe UI",
    sans-serif;
}
a {
  color: var(--harbour);
}
h1 {
  font-size: 1.35rem;
  line-height: 1.25;
  margin: 0;
  overflow-wrap: anywhere;
}
.muted {
  color: var(--muted);
}
.small {
  font-size: 0.85rem;
}
button,
.button {
  font: inherit;
  font-size: 0.9rem;
  color: var(--ink);
  background: var(--card);
  border: 1px solid var(--rule);
  border-radius: 8px;
  padding: 6px 12px;
  cursor: pointer;
  text-decoration: none;
  display: inline-block;
  white-space: nowrap;
}
button:hover,
.button:hover {
  border-color: var(--harbour);
}

/* Layout: an ink rail beside the list on desktop, a scrolling strip on top on phones. */
body.app {
  display: grid;
  grid-template-columns: 220px 1fr;
  min-height: 100vh;
}
.rail {
  background: var(--rail);
  color: var(--rail-ink);
  padding: 16px 10px;
  position: sticky;
  top: 0;
  height: 100vh;
  overflow-y: auto;
}
.rail .brand {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--rail-ink);
  text-decoration: none;
  font-weight: 650;
  font-size: 1.1rem;
  padding: 4px 8px 16px;
}
.rail .brand img {
  border-radius: 7px;
}
.rail ul {
  list-style: none;
  margin: 0;
  padding: 0;
}
.rail li a {
  display: flex;
  justify-content: space-between;
  gap: 8px;
  color: var(--rail-ink);
  text-decoration: none;
  padding: 7px 10px;
  border-radius: 8px;
}
.rail li a:hover {
  background: rgba(255, 255, 255, 0.07);
}
.rail li a[aria-current="page"] {
  background: rgba(141, 187, 227, 0.18);
  font-weight: 600;
}
.rail .count {
  font-weight: 600;
  color: var(--rail-ink);
}
.rail .signout {
  margin-top: 24px;
  padding: 0 8px;
}
.rail .signout button {
  background: transparent;
  color: var(--rail-muted);
  border-color: rgba(255, 255, 255, 0.15);
}
main {
  min-width: 0;
  padding: 20px 28px 40px;
  max-width: 1100px;
}
.bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
}

/* Thread list */
.threads {
  list-style: none;
  margin: 0;
  padding: 0;
  background: var(--card);
  border: 1px solid var(--rule);
  border-radius: 12px;
  overflow: hidden;
}
.threads li + li {
  border-top: 1px solid var(--rule);
}
.threads a {
  display: grid;
  grid-template-columns: minmax(120px, 200px) 1fr auto;
  gap: 12px;
  align-items: baseline;
  padding: 10px 14px;
  color: var(--ink);
  text-decoration: none;
}
.threads a:hover {
  background: rgba(31, 79, 122, 0.06);
}
.threads .who,
.threads .what {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.threads .snippet {
  color: var(--muted);
}
.threads .n {
  color: var(--muted);
  font-size: 0.85em;
}
.threads .unread .who,
.threads .unread .subject {
  font-weight: 650;
}
.threads .unread a {
  box-shadow: inset 3px 0 0 var(--harbour);
}
.threads .meta {
  display: flex;
  gap: 8px;
  align-items: center;
  color: var(--muted);
  font-size: 0.85rem;
  white-space: nowrap;
}
.tag {
  font-size: 0.75rem;
  font-weight: 600;
  border-radius: 999px;
  padding: 1px 8px;
  border: 1px solid currentColor;
  white-space: nowrap;
}
.tag-hello {
  color: var(--hello);
}
.tag-info {
  color: var(--info);
}
.tag-sales {
  color: var(--sales);
}
.tag-other,
.tag-reports {
  color: var(--other);
}
.empty {
  color: var(--muted);
  padding: 32px 0;
}
.pager {
  text-align: center;
}

/* A conversation */
.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 16px;
}
.thread-head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin-bottom: 14px;
}
.message {
  background: var(--card);
  border: 1px solid var(--rule);
  border-radius: 12px;
  margin-bottom: 12px;
  overflow: hidden;
}
.message summary {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  padding: 12px 16px;
  cursor: pointer;
  list-style: none;
}
.message summary::-webkit-details-marker {
  display: none;
}
.message summary time {
  color: var(--muted);
  font-size: 0.85rem;
}
.message .headers {
  padding: 0 16px 10px;
  font-size: 0.88rem;
  overflow-wrap: anywhere;
}
.message .headers .muted {
  margin-right: 4px;
}
.auth {
  font-size: 0.78rem;
  font-weight: 600;
  margin-right: 8px;
}
.auth.ok {
  color: var(--ok);
}
.auth.warn,
.warn {
  color: var(--warn-ink);
}
.banner {
  margin: 0 16px 12px;
  padding: 10px 12px;
  border-radius: 8px;
}
.banner.warn {
  background: var(--warn-bg);
}
.images {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0 16px 10px;
  font-size: 0.88rem;
  color: var(--muted);
}
iframe.body {
  display: block;
  width: 100%;
  border: 0;
  border-top: 1px solid var(--rule);
  background: #fff;
  resize: vertical;
}
pre.text {
  margin: 0;
  padding: 14px 16px;
  border-top: 1px solid var(--rule);
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  font: inherit;
}
pre.text .quoted {
  color: var(--muted);
}
.attachments {
  list-style: none;
  margin: 0;
  padding: 10px 16px 14px;
  border-top: 1px solid var(--rule);
  display: grid;
  gap: 4px;
  font-size: 0.9rem;
}
.attachments li::before {
  content: "📎 ";
}
.attachments .missing {
  color: var(--muted);
}

/* Sign-in and offline */
body.plain main {
  max-width: 380px;
  margin: 10vh auto 0;
  padding: 0 16px;
}
.signin,
.offline {
  text-align: center;
}
.signin img,
.offline img {
  border-radius: 14px;
}
.signin form {
  display: grid;
  gap: 12px;
  text-align: left;
  margin-top: 20px;
}
.signin label {
  display: grid;
  gap: 4px;
  font-size: 0.9rem;
}
.signin input {
  font: inherit;
  padding: 9px 10px;
  border: 1px solid var(--rule);
  border-radius: 8px;
  background: var(--card);
  color: var(--ink);
}
.signin button {
  background: var(--harbour);
  color: #fff;
  border: 0;
  padding: 10px;
}
.error {
  color: var(--warn-ink);
  background: var(--warn-bg);
  padding: 8px 10px;
  border-radius: 8px;
}
.offline {
  max-width: 420px;
  margin: 12vh auto 0;
  padding: 0 16px;
}

/* Phones: 12px gutter, the rail becomes a scrolling strip, list rows stack. */
@media (max-width: 900px) {
  body.app {
    display: block;
  }
  .rail {
    position: sticky;
    height: auto;
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 8px 12px;
    overflow-x: auto;
    z-index: 2;
  }
  .rail .brand {
    padding: 0 6px 0 0;
  }
  .rail .brand span {
    display: none;
  }
  .rail ul {
    display: flex;
    gap: 2px;
  }
  .rail li a {
    white-space: nowrap;
    padding: 6px 10px;
  }
  .rail .signout {
    margin: 0;
    padding: 0;
  }
  .rail .signout button {
    white-space: nowrap;
  }
  main {
    padding: 14px 12px 32px;
  }
  .threads {
    margin: 0 -12px;
    border-radius: 0;
    border-left: 0;
    border-right: 0;
  }
  .threads a {
    grid-template-columns: 1fr auto;
    grid-template-areas: "who meta" "what what";
    row-gap: 2px;
    padding: 10px 12px;
  }
  .threads .who {
    grid-area: who;
  }
  .threads .what {
    grid-area: what;
    white-space: normal;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
  }
  .threads .meta {
    grid-area: meta;
  }
  .message {
    margin: 0 -12px 10px;
    border-radius: 0;
    border-left: 0;
    border-right: 0;
  }
}

/* Writing */
.rail .compose {
  display: block;
  margin: 0 4px 14px;
  padding: 9px 12px;
  border-radius: 10px;
  background: var(--harbour-strong, #2c6aa0);
  color: #fff;
  text-decoration: none;
  font-weight: 600;
  text-align: center;
}
.rail .settings {
  display: block;
  margin: 18px 8px 0;
  color: var(--rail-muted);
  text-decoration: none;
  font-size: 0.9rem;
}
button.primary {
  background: var(--harbour);
  border-color: var(--harbour);
  color: #fff;
}
button.quiet {
  background: transparent;
}
.reply-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding: 10px 16px 14px;
  border-top: 1px solid var(--rule);
}
.pending {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 10px;
  background: var(--card);
  border: 1px dashed var(--rule);
  border-radius: 12px;
  padding: 10px 14px;
  margin-bottom: 10px;
}
.pending form {
  margin: 0;
}
.pending.sending {
  border-style: solid;
  border-color: var(--harbour);
}
.pending.failed {
  background: var(--warn-bg);
  color: var(--warn-ink);
  border-style: solid;
}
.compose-form,
.settings-form {
  display: grid;
  gap: 12px;
  background: var(--card);
  border: 1px solid var(--rule);
  border-radius: 12px;
  padding: 16px;
  margin-bottom: 16px;
}
.compose-form label,
.settings-form label {
  display: grid;
  gap: 4px;
  font-size: 0.88rem;
  color: var(--muted);
}
.compose-form label.check,
.settings-form label.check {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--ink);
}
.compose-form input:not([type="checkbox"]):not([type="file"]),
.compose-form select,
.compose-form textarea,
.settings-form textarea {
  font: inherit;
  font-size: 16px;
  color: var(--ink);
  background: var(--paper);
  border: 1px solid var(--rule);
  border-radius: 8px;
  padding: 8px 10px;
  width: 100%;
}
.compose-form textarea {
  min-height: 280px;
  resize: vertical;
  line-height: 1.5;
}
.compose-form .copies summary {
  cursor: pointer;
  color: var(--harbour);
  font-size: 0.88rem;
  margin-bottom: 8px;
}
.compose-form .copies label + label {
  margin-top: 10px;
}
.compose-form fieldset {
  border: 1px solid var(--rule);
  border-radius: 8px;
  display: grid;
  gap: 6px;
}
.compose-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
}
.compose-form .banner,
.compose-form .error {
  margin: 0;
}
.compose-form .banner ul {
  margin: 4px 0 8px;
}
.saved {
  color: var(--ok);
  margin: 0;
}
.settings-form h2 {
  font-size: 1.05rem;
  margin: 0;
}
.issues {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 8px;
}
.issues li {
  display: flex;
  justify-content: space-between;
  gap: 10px;
  flex-wrap: wrap;
  align-items: center;
  overflow-wrap: anywhere;
}
@media (max-width: 900px) {
  .rail .compose {
    margin: 0;
    padding: 6px 12px;
    white-space: nowrap;
  }
  .rail .settings {
    margin: 0;
    padding: 6px 8px;
    white-space: nowrap;
  }
  .compose-form,
  .settings-form {
    margin: 0 -12px 12px;
    border-radius: 0;
    border-left: 0;
    border-right: 0;
    padding: 14px 12px;
  }
}

/* Search */
.bar {
  gap: 12px;
  flex-wrap: wrap;
}
.bar h1 {
  overflow-wrap: anywhere;
}
.search {
  flex: 1 1 260px;
  max-width: 420px;
}
.search input {
  width: 100%;
  font: inherit;
  font-size: 16px;
  padding: 8px 12px;
  border: 1px solid var(--rule);
  border-radius: 999px;
  background: var(--card);
  color: var(--ink);
}
.search-help {
  margin: 0 0 12px;
  line-height: 1.8;
}
.search-help code {
  background: var(--card);
  border: 1px solid var(--rule);
  border-radius: 4px;
  padding: 0 4px;
}
.threads mark {
  background: #f2e2a6;
  color: inherit;
  border-radius: 2px;
}
@media (prefers-color-scheme: dark) {
  .threads mark {
    background: #5a4a17;
  }
}
@media (max-width: 900px) {
  .search {
    max-width: none;
  }
}