:root {
  --bg: #12141a;
  --bg-2: #181c24;
  --rail: #0e1015;
  --line: #2b3140;
  --ink: #eef1f6;
  --muted: #8b95a6;
  --accent: #c9923a;
  --accent-ink: #1a1408;
  --ok: #3fae82;
  --warn: #d4a054;
  --danger: #d4605a;
  --paper: #f3eee4;
  --paper-ink: #1d1812;
  --paper-line: #d7cfc2;
  --shadow: 0 18px 40px rgba(0, 0, 0, 0.28);
  --sans: "Segoe UI", "Source Sans 3", "IBM Plex Sans", system-ui, sans-serif;
  --mono: "IBM Plex Mono", "ui-monospace", "SFMono-Regular", Menlo, monospace;
}

* { box-sizing: border-box; }
html, body { margin: 0; min-height: 100%; }
body {
  font-family: var(--sans);
  background:
    radial-gradient(1200px 500px at 10% -10%, #243049 0%, transparent 55%),
    var(--bg);
  color: var(--ink);
  line-height: 1.45;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
code { font-family: var(--mono); font-size: 0.92em; }

.shell {
  display: grid;
  grid-template-columns: 240px 1fr;
  min-height: 100vh;
}
.rail {
  background: var(--rail);
  border-right: 1px solid var(--line);
  padding: 1.25rem 1rem;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}
.brand {
  display: flex;
  gap: 0.75rem;
  align-items: center;
  color: inherit;
  text-decoration: none;
}
.brand strong { display: block; font-size: 0.95rem; letter-spacing: 0.02em; }
.brand em { display: block; font-style: normal; color: var(--muted); font-size: 0.78rem; }
.mark {
  width: 34px; height: 34px; border-radius: 8px;
  background:
    conic-gradient(from 210deg, #c9923a, #7ea4c8, #c9923a);
  position: relative;
  box-shadow: inset 0 0 0 6px var(--rail);
}
.mark::after {
  content: "";
  position: absolute; inset: 10px;
  border: 2px solid #f3eee4;
  border-radius: 3px;
  transform: rotate(12deg);
}
.rail nav { display: flex; flex-direction: column; gap: 0.25rem; }
.rail nav a {
  color: var(--ink);
  padding: 0.55rem 0.7rem;
  border-radius: 8px;
  text-decoration: none;
}
.rail nav a.active, .rail nav a:hover {
  background: var(--bg-2);
  text-decoration: none;
}
.logout { margin-top: auto; display: grid; gap: 0.4rem; }
.logout button {
  background: transparent;
  color: var(--ink);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 0.5rem 0.7rem;
  cursor: pointer;
}
.who { color: var(--muted); font-size: 0.8rem; padding: 0 0.2rem; }

.main { min-width: 0; }
.top {
  display: flex; align-items: center; gap: 0.75rem;
  padding: 1rem 1.5rem 0;
}
.top h1 { font-size: 1.35rem; font-weight: 650; margin: 0; }
.menu { display: none; }
.content { padding: 1rem 1.5rem 2.5rem; display: grid; gap: 1rem; }

.card {
  background: var(--bg-2);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 1.1rem 1.2rem;
  box-shadow: var(--shadow);
}
.card h2 { margin: 0 0 0.7rem; font-size: 1rem; }
.muted { color: var(--muted); }
.grid { display: grid; gap: 1rem; }
.grid.stats { grid-template-columns: repeat(3, 1fr); }
.grid.two { grid-template-columns: 1fr 1fr; gap: 0.9rem; }
.row-head { display: flex; justify-content: space-between; align-items: center; gap: 1rem; flex-wrap: wrap; }
.actions { display: flex; gap: 0.5rem; flex-wrap: wrap; }
.stack { display: grid; gap: 1rem; }

label { display: grid; gap: 0.35rem; font-size: 0.92rem; margin: 0.55rem 0; }
label.inline { display: flex; align-items: center; gap: 0.45rem; }
input, select, textarea, button {
  font: inherit;
}
input, select, textarea {
  background: #10131a;
  color: var(--ink);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 0.55rem 0.7rem;
  width: 100%;
}
.help { color: var(--muted); font-size: 0.8rem; }

.btn {
  display: inline-flex; align-items: center; justify-content: center;
  border-radius: 8px;
  border: 1px solid var(--line);
  background: #222836;
  color: var(--ink);
  padding: 0.55rem 0.9rem;
  cursor: pointer;
  text-decoration: none;
}
.btn:hover { text-decoration: none; filter: brightness(1.08); }
.btn.primary { background: var(--accent); color: var(--accent-ink); border-color: transparent; font-weight: 650; }
.btn.danger { background: #4a2422; border-color: #7a3b37; }
.btn.small { padding: 0.3rem 0.55rem; font-size: 0.85rem; }
.btn.block { width: 100%; }

.flash {
  border-radius: 10px;
  padding: 0.8rem 1rem;
  border: 1px solid var(--line);
}
.flash-success { background: #163328; border-color: #2d6b52; }
.flash-error { background: #3a1c1b; border-color: #7a3b37; }
.flash-info { background: #1c2738; }

.status { font-weight: 650; margin: 0 0 0.4rem; }
.status.ok { color: var(--ok); }
.status.warn { color: var(--warn); }
.pill {
  display: inline-block;
  padding: 0.1rem 0.45rem;
  border-radius: 999px;
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
.pill-sent { background: #163328; color: #8ee0bf; }
.pill-queued { background: #1c2738; color: #9ec3f0; }
.pill-deferred { background: #3a2e16; color: #e6c37a; }
.pill-failed { background: #3a1c1b; color: #f0b0ac; }

.table-wrap { overflow: auto; }
table { width: 100%; border-collapse: collapse; font-size: 0.92rem; }
th, td { text-align: left; padding: 0.55rem 0.4rem; border-bottom: 1px solid var(--line); vertical-align: top; }
th { color: var(--muted); font-weight: 600; }

.compose {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(240px, 280px);
  gap: 1rem;
  align-items: start;
  width: 100%;
  min-width: 0;
}
.compose > .flash { grid-column: 1 / -1; }
.letter {
  background: var(--paper);
  color: var(--paper-ink);
  border-radius: 16px;
  padding: 1.25rem;
  box-shadow: var(--shadow);
  min-width: 0;
}
.letter input, .letter textarea, .letter select {
  background: #fffdf8;
  color: var(--paper-ink);
  border-color: var(--paper-line);
}
.letter .help, .letter .muted { color: #6d6458; }
.letter-meta { display: grid; grid-template-columns: 1fr 1fr; gap: 0 0.8rem; }
.letter-meta label:nth-child(n+5) { grid-column: 1 / -1; }
.mode-row { display: flex; gap: 1rem; align-items: center; margin: 0.4rem 0; }
.compose-side { display: grid; gap: 1rem; min-width: 0; }

@media (max-width: 1100px) {
  .compose { grid-template-columns: 1fr; }
}

.filters { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0.6rem 0.8rem; align-items: end; }
.pager { display: flex; gap: 0.8rem; align-items: center; margin-top: 1rem; }
.kv { display: grid; grid-template-columns: 160px 1fr; gap: 0.4rem 1rem; }
.kv dt { color: var(--muted); }

.auth { min-height: 100vh; display: grid; place-items: center; padding: 1.5rem; }
.login-card {
  width: min(420px, 100%);
  background: var(--bg-2);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 1.5rem;
  box-shadow: var(--shadow);
}
.brand-lg { margin-bottom: 1.2rem; }

@media (max-width: 980px) {
  .shell { grid-template-columns: 1fr; }
  .rail {
    display: none;
    position: fixed; inset: 0 auto 0 0; width: 240px; z-index: 20;
  }
  body.nav-open .rail { display: flex; }
  .menu {
    display: inline-flex;
    background: #222836; color: var(--ink); border: 1px solid var(--line);
    border-radius: 8px; padding: 0.3rem 0.55rem; cursor: pointer;
  }
  .grid.stats, .grid.two, .compose, .letter-meta, .filters { grid-template-columns: 1fr; }
  .kv { grid-template-columns: 1fr; }
}