:root {
  --bg: #f6f7f9;
  --panel: #ffffff;
  --ink: #1b1f24;
  --muted: #6b7480;
  --line: #e2e6eb;
  --accent: #6f4ef2;
  --accent-ink: #ffffff;
  --ok: #17794c;
  --ok-bg: #e4f6ec;
  --bad: #b4232c;
  --bad-bg: #fdeaea;
  --warn: #8a5a00;
  --warn-bg: #fdf3e0;
  --radius: 10px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #14171c;
    --panel: #1c2027;
    --ink: #e8eaed;
    --muted: #98a1ae;
    --line: #2c323c;
    --accent: #9d86ff;
    --accent-ink: #14171c;
    --ok: #63d39b;
    --ok-bg: #17342a;
    --bad: #ff8b8b;
    --bad-bg: #3a1f22;
    --warn: #f0c069;
    --warn-bg: #38301c;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 15px/1.55 system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

a { color: var(--accent); }
h1 { font-size: 1.6rem; margin: 0 0 .3rem; }
h2 { font-size: 1.05rem; margin: 0 0 .8rem; }
code { background: var(--bg); padding: .1em .35em; border-radius: 4px; font-size: .9em; }

/* ------------------------------------------------------------------ layout */
.wrap { max-width: 1100px; margin: 0 auto; padding: 1.5rem 1rem 4rem; }

.topbar {
  display: flex; align-items: center; gap: 1rem; flex-wrap: wrap;
  padding: .7rem 1rem; background: var(--panel); border-bottom: 1px solid var(--line);
  position: sticky; top: 0; z-index: 10;
}
.brand { font-weight: 700; text-decoration: none; color: var(--ink); margin-right: auto; }
.topbar nav { display: flex; align-items: center; gap: .25rem; flex-wrap: wrap; }
.topbar nav a {
  padding: .4rem .7rem; border-radius: var(--radius); text-decoration: none;
  color: var(--muted); font-weight: 500;
}
.topbar nav a:hover { background: var(--bg); color: var(--ink); }
.topbar nav a.on { background: var(--accent); color: var(--accent-ink); }
.nav-toggle { display: none; }

@media (max-width: 720px) {
  .brand { margin-right: 0; }
  .nav-toggle { display: block; margin-left: auto; }
  .topbar nav { display: none; width: 100%; flex-direction: column; align-items: stretch; }
  .topbar nav.open { display: flex; }
}

.page-head { display: flex; align-items: center; gap: 1rem; flex-wrap: wrap; margin-bottom: 1rem; }
.page-head h1 { margin-right: auto; }

.card {
  background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 1.1rem; margin-bottom: 1.1rem;
}
.card.center { text-align: center; }
.grid-2 { display: grid; grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); gap: 1.1rem; }

/* ------------------------------------------------------------------- stats */
.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: .8rem; margin: 1rem 0 1.3rem; }
.stat {
  background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 1rem; text-decoration: none; color: var(--ink); display: block;
}
.stat:hover { border-color: var(--accent); }
.stat-value { display: block; font-size: 1.9rem; font-weight: 700; line-height: 1.1; }
.stat-label { color: var(--muted); font-size: .85rem; }
.stat-bad .stat-value { color: var(--bad); }

/* ------------------------------------------------------------------ tables */
table { width: 100%; border-collapse: collapse; }
th, td { text-align: left; padding: .55rem .5rem; border-bottom: 1px solid var(--line); vertical-align: top; }
th { font-size: .78rem; text-transform: uppercase; letter-spacing: .04em; color: var(--muted); }
tbody tr:last-child td { border-bottom: none; }
.table-scroll { overflow-x: auto; }
.right { text-align: right; }
.nowrap { white-space: nowrap; }

/* ------------------------------------------------------------------- forms */
label { display: block; margin: .85rem 0 .3rem; font-weight: 600; font-size: .9rem; }
input, select, textarea {
  width: 100%; padding: .55rem .65rem; border: 1px solid var(--line);
  border-radius: 8px; background: var(--bg); color: var(--ink); font: inherit;
}
input:focus, select:focus, textarea:focus { outline: 2px solid var(--accent); outline-offset: 1px; }
textarea { resize: vertical; }
.checkline { display: flex; gap: .5rem; align-items: flex-start; font-weight: 400; }
.checkline input { width: auto; margin-top: .25rem; }
.help { color: var(--muted); font-size: .85rem; margin: .35rem 0 0; }
.actions { display: flex; gap: .5rem; margin-top: 1.1rem; flex-wrap: wrap; }

button, .button {
  display: inline-block; padding: .5rem .9rem; border: 1px solid var(--line);
  border-radius: 8px; background: var(--panel); color: var(--ink);
  font: inherit; font-weight: 600; cursor: pointer; text-decoration: none;
}
button:hover, .button:hover { border-color: var(--accent); }
.primary { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); }
.ghost { background: transparent; color: var(--muted); }
.danger { color: var(--bad); }
.small { padding: .28rem .55rem; font-size: .82rem; }
.block { width: 100%; margin-top: 1.2rem; }
.inline { display: inline; }
.linkish { border: none; background: none; color: var(--muted); padding: .4rem .7rem; }

.filters { display: flex; gap: .5rem; flex-wrap: wrap; align-items: center; margin-bottom: 1rem; }
.filters input, .filters select { width: auto; min-width: 190px; flex: 1 1 190px; }
.filters button, .filters .button { margin-top: 0; }

/* ------------------------------------------------------------------ pieces */
.muted { color: var(--muted); }
.small-text { font-size: .82rem; }
.error-text { color: var(--bad); }
.plain { list-style: none; padding: 0; margin: 0; }
.plain li { padding: .3rem 0; border-bottom: 1px solid var(--line); }

.tag {
  display: inline-block; background: var(--bg); border: 1px solid var(--line);
  border-radius: 999px; padding: .1rem .55rem; margin: .1rem .2rem .1rem 0;
  font-size: .78rem; color: var(--muted);
}

.badge {
  display: inline-block; border-radius: 999px; padding: .1rem .55rem;
  font-size: .76rem; font-weight: 700; text-transform: uppercase; letter-spacing: .03em;
  background: var(--bg); color: var(--muted);
}
.badge-sent { background: var(--ok-bg); color: var(--ok); }
.badge-failed { background: var(--bad-bg); color: var(--bad); }
.badge-pending, .badge-preview { background: var(--warn-bg); color: var(--warn); }

.flash { padding: .7rem .9rem; border-radius: var(--radius); margin-bottom: 1rem;
  border: 1px solid transparent; }
.flash ul { margin: 0; padding-left: 1.1rem; }
.flash-success { background: var(--ok-bg); color: var(--ok); border-color: currentColor; }
.flash-error { background: var(--bad-bg); color: var(--bad); border-color: currentColor; }
.flash-warning { background: var(--warn-bg); color: var(--warn); border-color: currentColor; }

.details { display: grid; grid-template-columns: minmax(120px, auto) 1fr; gap: .35rem .9rem; margin: 0; }
.details dt { color: var(--muted); font-size: .85rem; }
.details dd { margin: 0; }

.preview {
  white-space: pre-wrap; word-break: break-word; background: var(--bg);
  border: 1px solid var(--line); border-radius: 8px; padding: .9rem;
  margin-top: 1rem; font-size: .9rem;
}

.login-card {
  max-width: 380px; margin: 8vh auto 0; background: var(--panel);
  border: 1px solid var(--line); border-radius: var(--radius); padding: 1.8rem;
}
.login-card h1 { margin-bottom: .1rem; }