/* Mailwright
   Palette: cool paper and postal blue. Signal colours are reserved for delivery
   state, never decoration. One radius (3px) on controls, square panels.
   Type: Plex Sans for the interface, Plex Serif for the letter preview (the
   preview is a letter, so it should read like one), Plex Mono only where the
   content really is data: merge tokens, addresses, ids. */

:root {
  --paper: #edf0f3;
  --card: #ffffff;
  --ink: #15202a;
  --ink-soft: #566475;
  --ink-faint: #8794a2;
  --rule: #d7dde3;
  --rule-soft: #e6eaee;
  --accent: #2b4acb;
  --accent-dark: #1f39a8;
  --accent-wash: #eef1fd;
  --sent: #157f5c;
  --queued: #a7761b;
  --failed: #b3392c;
  --focus: #a9b8f0;
  --rail: 232px;
  --sans: "IBM Plex Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --serif: "IBM Plex Serif", Georgia, "Times New Roman", serif;
  --mono: "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

* { box-sizing: border-box; }

html, body { height: 100%; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font: 15px/1.55 var(--sans);
  -webkit-font-smoothing: antialiased;
}

a { color: var(--accent); }
h1, h2, h3 { font-weight: 600; letter-spacing: -0.014em; margin: 0; }
h1 { font-size: 1.5rem; }
h2 { font-size: 1.0625rem; }
h3 { font-size: .9375rem; }
p { margin: 0 0 .9rem; }

:focus-visible { outline: 3px solid var(--focus); outline-offset: 2px; border-radius: 2px; }

@media (prefers-reduced-motion: reduce) {
  * { animation-duration: .01ms !important; transition-duration: .01ms !important; }
}

/* ---------- shell ---------- */

.app { display: grid; grid-template-columns: var(--rail) 1fr; min-height: 100vh; }

.rail {
  background: var(--card);
  border-right: 1px solid var(--rule);
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 20px 14px;
  position: sticky;
  top: 0;
  height: 100vh;
}

.brand { display: flex; align-items: baseline; gap: 8px; padding: 2px 10px 20px; }
.brand b { font-size: 1.0625rem; font-weight: 600; letter-spacing: -0.02em; }
.brand span { font-size: .75rem; color: var(--ink-faint); font-family: var(--mono); }

.rail nav { display: flex; flex-direction: column; gap: 1px; }
.rail nav a {
  display: flex; justify-content: space-between; align-items: center; gap: 8px;
  padding: 8px 10px; border-radius: 3px; color: var(--ink-soft);
  text-decoration: none; font-size: .9375rem;
}
.rail nav a:hover { background: var(--paper); color: var(--ink); }
.rail nav a.on { background: var(--accent-wash); color: var(--accent-dark); font-weight: 500; }
.rail nav a em { font-style: normal; font-family: var(--mono); font-size: .75rem; color: var(--ink-faint); }

.rail-foot { margin-top: auto; border-top: 1px solid var(--rule-soft); padding-top: 14px; }

.quota { padding: 0 10px 14px; }
.quota-head { display: flex; justify-content: space-between; font-size: .8125rem; color: var(--ink-soft); margin-bottom: 6px; }
.quota-head b { font-family: var(--mono); font-weight: 500; color: var(--ink); }
.meter { height: 4px; background: var(--rule-soft); overflow: hidden; }
.meter i { display: block; height: 100%; background: var(--accent); }
.meter i[data-full="true"] { background: var(--failed); }

.who { display: flex; align-items: center; gap: 9px; padding: 4px 10px; }
.who img { width: 26px; height: 26px; border-radius: 50%; }
.who div { min-width: 0; }
.who strong { display: block; font-size: .8125rem; font-weight: 500; }
.who small { display: block; color: var(--ink-faint); font-size: .75rem; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

main { min-width: 0; }
.page { padding: 34px 40px 72px; max-width: 1180px; }
.page-head { display: flex; align-items: flex-start; justify-content: space-between; gap: 20px; margin-bottom: 26px; }
.page-head p { color: var(--ink-soft); margin: 6px 0 0; max-width: 58ch; }

/* ---------- controls ---------- */

button, .btn {
  font: 500 .9375rem/1 var(--sans);
  padding: 10px 16px; border-radius: 3px; border: 1px solid transparent;
  background: var(--accent); color: #fff; cursor: pointer; text-decoration: none;
  display: inline-flex; align-items: center; gap: 7px;
}
button:hover, .btn:hover { background: var(--accent-dark); }
button:disabled { background: var(--rule); color: var(--ink-faint); cursor: not-allowed; }

.btn-quiet, button.quiet {
  background: var(--card); color: var(--ink); border-color: var(--rule);
}
.btn-quiet:hover, button.quiet:hover { background: var(--paper); border-color: var(--ink-faint); }
button.ghost { background: transparent; color: var(--ink-soft); padding: 6px 8px; }
button.ghost:hover { background: var(--paper); color: var(--ink); }
button.danger { background: var(--card); color: var(--failed); border-color: var(--rule); }
button.danger:hover { background: #fdf2f0; border-color: var(--failed); }
button.small, .btn.small { padding: 6px 11px; font-size: .8125rem; }

input[type="text"], input[type="email"], input[type="number"], input[type="datetime-local"], input[type="search"], select, textarea {
  font: 15px/1.5 var(--sans); color: var(--ink); background: var(--card);
  border: 1px solid var(--rule); border-radius: 3px; padding: 9px 11px; width: 100%;
}
input:focus, select:focus, textarea:focus { border-color: var(--accent); }
label { display: block; font-size: .8125rem; color: var(--ink-soft); margin-bottom: 5px; }
.field { margin-bottom: 16px; }
.row { display: flex; gap: 12px; }
.row > * { flex: 1; }

.switch { display: flex; align-items: center; gap: 9px; font-size: .9375rem; color: var(--ink); margin-bottom: 10px; }
.switch input { width: auto; accent-color: var(--accent); }

/* ---------- panels ---------- */

.panel { background: var(--card); border: 1px solid var(--rule); }
.panel + .panel { margin-top: 18px; }
.panel-head { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 14px 18px; border-bottom: 1px solid var(--rule-soft); }
.panel-body { padding: 18px; }

.empty { border: 1px dashed var(--rule); background: var(--card); padding: 44px 32px; text-align: center; }
.empty h2 { margin-bottom: 8px; }
.empty p { color: var(--ink-soft); max-width: 46ch; margin: 0 auto 18px; }

table { width: 100%; border-collapse: collapse; font-size: .875rem; }
th { text-align: left; font-weight: 500; color: var(--ink-soft); font-size: .8125rem; padding: 10px 14px; border-bottom: 1px solid var(--rule); }
td { padding: 11px 14px; border-bottom: 1px solid var(--rule-soft); vertical-align: middle; }
tr:last-child td { border-bottom: 0; }
tbody tr:hover { background: #fafbfc; }
.mono, .email { font-family: var(--mono); font-size: .8125rem; }

/* ---------- status ---------- */

.tag { display: inline-flex; align-items: center; gap: 6px; font-size: .8125rem; color: var(--ink-soft); }
.tag::before { content: ""; width: 7px; height: 7px; border-radius: 50%; background: var(--ink-faint); }
.tag[data-s="sent"]::before, .tag[data-s="completed"]::before { background: var(--sent); }
.tag[data-s="pending"]::before, .tag[data-s="sending"]::before, .tag[data-s="scheduled"]::before { background: var(--queued); }
.tag[data-s="failed"]::before, .tag[data-s="cancelled"]::before { background: var(--failed); }
.tag[data-s="sending"]::before { animation: pulse 1.6s ease-in-out infinite; }
@keyframes pulse { 50% { opacity: .25; } }

.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(118px, 1fr)); border-top: 1px solid var(--rule-soft); }
.stat { padding: 16px 18px; border-right: 1px solid var(--rule-soft); }
.stat:last-child { border-right: 0; }
.stat b { display: block; font: 500 1.5rem/1.1 var(--mono); letter-spacing: -0.02em; }
.stat span { font-size: .8125rem; color: var(--ink-soft); }
.stat[data-tone="sent"] b { color: var(--sent); }
.stat[data-tone="failed"] b { color: var(--failed); }
.stat[data-tone="queued"] b { color: var(--queued); }

/* ---------- campaign list ---------- */

.campaign { display: block; padding: 16px 18px; border-bottom: 1px solid var(--rule-soft); text-decoration: none; color: inherit; }
.campaign:last-child { border-bottom: 0; }
.campaign:hover { background: #fafbfc; }
.campaign-top { display: flex; align-items: baseline; justify-content: space-between; gap: 16px; }
.campaign-top strong { font-weight: 600; font-size: .9375rem; }
.campaign-sub { color: var(--ink-soft); font-size: .8125rem; margin-top: 4px; display: flex; gap: 14px; flex-wrap: wrap; }
.progress { height: 3px; background: var(--rule-soft); margin-top: 11px; display: flex; }
.progress i { display: block; height: 100%; }
.progress i[data-k="sent"] { background: var(--sent); }
.progress i[data-k="failed"] { background: var(--failed); }
.progress i[data-k="pending"] { background: var(--queued); opacity: .45; }

/* ---------- composer ---------- */

.build { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 480px); gap: 20px; align-items: start; }

.toolbar { display: flex; gap: 2px; padding: 7px 10px; border-bottom: 1px solid var(--rule-soft); flex-wrap: wrap; align-items: center; }
.toolbar button { background: transparent; color: var(--ink-soft); padding: 5px 9px; font-size: .875rem; border-radius: 3px; }
.toolbar button:hover { background: var(--paper); color: var(--ink); }
.toolbar .sep { width: 1px; height: 18px; background: var(--rule); margin: 0 6px; }

.editor {
  min-height: 320px; padding: 20px 22px; outline: none;
  font: 15px/1.7 var(--sans); color: var(--ink);
}
.editor:focus { box-shadow: inset 0 0 0 2px var(--accent-wash); }
.editor p { margin: 0 0 1em; }
.editor a { color: var(--accent); }

/* A merge token is data, so it is set in mono and outlined rather than filled —
   it should read as a slot to be filled, not as a button. */
.token {
  font-family: var(--mono); font-size: .8125em; color: var(--accent-dark);
  background: var(--accent-wash); border: 1px solid #ccd6f7;
  border-radius: 2px; padding: 1px 4px; white-space: nowrap;
}

.fields { display: flex; flex-wrap: wrap; gap: 6px; padding: 12px 18px; border-top: 1px solid var(--rule-soft); background: #fbfcfd; }
.fields button { background: var(--card); border: 1px solid var(--rule); color: var(--accent-dark); font-family: var(--mono); font-size: .75rem; padding: 4px 8px; }
.fields button:hover { border-color: var(--accent); background: var(--accent-wash); }
.fields > span { font-size: .8125rem; color: var(--ink-soft); align-self: center; margin-right: 4px; }

/* ---------- preview ---------- */

.preview { position: sticky; top: 20px; }
.preview-nav { display: flex; align-items: center; justify-content: space-between; gap: 10px; padding: 10px 14px; border-bottom: 1px solid var(--rule-soft); }
.preview-nav select { width: auto; flex: 1; font-family: var(--mono); font-size: .8125rem; padding: 6px 8px; }
.letter { padding: 24px 26px; font: 15.5px/1.72 var(--serif); color: #1b2732; max-height: 62vh; overflow: auto; }
.letter-subject { font: 600 1rem/1.4 var(--sans); margin-bottom: 4px; }
.letter-meta { font-family: var(--mono); font-size: .75rem; color: var(--ink-faint); padding-bottom: 14px; margin-bottom: 18px; border-bottom: 1px solid var(--rule-soft); }
.letter a { color: var(--accent); }
.letter img { max-width: 100%; }

.notice { display: flex; gap: 10px; padding: 11px 16px; font-size: .8125rem; border-bottom: 1px solid var(--rule-soft); }
.notice[data-tone="warn"] { background: #fdf8ee; color: #6d4c0e; }
.notice[data-tone="bad"] { background: #fdf2f0; color: #7e2a20; }
.notice[data-tone="good"] { background: #f0f8f4; color: #10583f; }
.notice code { font-family: var(--mono); }

/* ---------- misc ---------- */

.bar { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.bar-spacer { flex: 1; }
.filters { display: flex; gap: 2px; }
.filters button { background: transparent; border: 1px solid transparent; color: var(--ink-soft); font-size: .8125rem; padding: 5px 10px; }
.filters button.on { background: var(--accent-wash); color: var(--accent-dark); }

.hours { display: flex; align-items: flex-end; gap: 3px; height: 92px; padding: 18px; }
.hours div { flex: 1; min-width: 3px; background: var(--accent); opacity: .8; }
.hours div[data-k="click"] { background: var(--sent); }

.toast {
  position: fixed; left: 50%; bottom: 26px; transform: translateX(-50%);
  background: var(--ink); color: #fff; padding: 11px 18px; border-radius: 3px;
  font-size: .875rem; z-index: 40; max-width: 90vw;
}
.toast[data-tone="bad"] { background: var(--failed); }

.modal-veil { position: fixed; inset: 0; background: rgba(21, 32, 42, .42); display: grid; place-items: center; padding: 20px; z-index: 30; }
.modal { background: var(--card); border: 1px solid var(--rule); width: 100%; max-width: 540px; max-height: 88vh; overflow: auto; }

.signin { min-height: 100vh; display: grid; place-items: center; padding: 24px; }
.signin-card { background: var(--card); border: 1px solid var(--rule); max-width: 460px; width: 100%; padding: 40px 38px; }
.signin-card h1 { font-size: 1.6rem; margin-bottom: 10px; }
.signin-card p { color: var(--ink-soft); }
.signin-card ul { list-style: none; padding: 0; margin: 22px 0; color: var(--ink-soft); font-size: .875rem; }
.signin-card li { padding: 7px 0 7px 20px; position: relative; border-top: 1px solid var(--rule-soft); }
.signin-card li::before { content: ""; position: absolute; left: 4px; top: 15px; width: 5px; height: 5px; background: var(--accent); }

.skeleton { background: linear-gradient(90deg, var(--rule-soft), #f3f5f7, var(--rule-soft)); background-size: 200% 100%; animation: shimmer 1.3s linear infinite; height: 13px; border-radius: 2px; }
@keyframes shimmer { to { background-position: -200% 0; } }

@media (max-width: 1080px) {
  .build { grid-template-columns: 1fr; }
  .preview { position: static; }
}
@media (max-width: 780px) {
  .app { grid-template-columns: 1fr; }
  .rail { position: static; height: auto; flex-direction: row; align-items: center; flex-wrap: wrap; gap: 10px; }
  .rail nav { flex-direction: row; flex-wrap: wrap; flex: 1; }
  .rail-foot, .quota { display: none; }
  .page { padding: 22px 16px 60px; }
  .stat b { font-size: 1.25rem; }
}

/* ---------- sequences, attachments, integrations ---------- */

/* A follow-up is a block on a timeline, so it carries a rule down its left edge
   rather than sitting in its own card like an unrelated thing. */
.step { border-bottom: 1px solid var(--rule-soft); border-left: 2px solid var(--accent-wash); }
.step:last-child { border-bottom: 0; }
.step-when { display: flex; align-items: center; gap: 8px; padding: 11px 16px; font-size: .875rem; color: var(--ink-soft); background: #fbfcfd; }
.step-when input[type="number"] { width: 68px; padding: 5px 7px; font-family: var(--mono); font-size: .8125rem; }
.step-when select { width: auto; flex: 0 1 auto; padding: 5px 7px; font-size: .8125rem; }
.step .editor { min-height: 96px; padding: 14px 16px; font-size: .9375rem; }
.step-foot { display: flex; align-items: center; justify-content: space-between; gap: 10px; padding: 8px 16px 12px; font-size: .8125rem; color: var(--ink-faint); }

.pill {
  display: inline-block; margin-left: 6px; padding: 1px 7px;
  background: var(--accent-wash); color: var(--accent-dark);
  border-radius: 10px; font-size: .6875rem; font-family: var(--mono);
}

.grant { display: flex; align-items: flex-start; justify-content: space-between; gap: 16px; padding: 13px 0; border-bottom: 1px solid var(--rule-soft); }
.grant:last-child { border-bottom: 0; }
.grant > div { max-width: 58ch; }

input[type="file"] {
  font: .875rem var(--sans); color: var(--ink-soft);
  padding: 10px; border: 1px dashed var(--rule); border-radius: 3px; width: 100%; background: #fbfcfd;
}
input[type="file"]:hover { border-color: var(--accent); }