:root {
  --bg: #0f1115;
  --panel: #171a21;
  --panel2: #1d212b;
  --border: #2a2f3a;
  --text: #e6e9ef;
  --muted: #8b93a3;
  --accent: #4f9cf9;
  --ok: #35c26b;
  --err: #e5544d;
  --warn: #e0a13c;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  font-size: 15px;
  line-height: 1.5;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 24px;
  background: var(--panel);
  border-bottom: 1px solid var(--border);
}

.brand { font-weight: 700; color: var(--accent); text-decoration: none; font-size: 17px; }

nav a { color: var(--muted); text-decoration: none; margin-left: 16px; }
nav a:hover { color: var(--text); }

main { max-width: 1000px; margin: 24px auto; padding: 0 16px; }

a { color: var(--accent); }

h1, h2, h3 { margin: 0 0 12px; font-weight: 600; }
h2 { font-size: 17px; }
h3 { font-size: 15px; }

.card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 18px 20px;
  margin-bottom: 18px;
}

.card.narrow { max-width: 360px; margin: 40px auto; }
.card.span2 { grid-column: span 2; }

.grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
}
.grid:has(.span2) { grid-template-columns: 1fr 1fr; }

.big { font-size: 28px; font-weight: 700; color: var(--accent); }
.muted { color: var(--muted); font-size: 13px; }
.pre { white-space: pre-wrap; }

.chip {
  display: inline-block;
  background: var(--panel2);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 2px 10px;
  font-size: 12px;
  color: var(--muted);
  margin: 2px 4px 2px 0;
}

.badge { border-radius: 6px; padding: 1px 8px; font-size: 12px; }
.badge.sent { background: rgba(53, 194, 107, 0.15); color: var(--ok); }
.badge.pending { background: rgba(224, 161, 60, 0.15); color: var(--warn); }
.badge.failed { background: rgba(229, 84, 77, 0.15); color: var(--err); }

.flash {
  border-radius: 8px;
  padding: 10px 14px;
  margin-bottom: 16px;
  font-size: 14px;
}
.flash.ok { background: rgba(53, 194, 107, 0.12); border: 1px solid var(--ok); color: var(--ok); }
.flash.err { background: rgba(229, 84, 77, 0.12); border: 1px solid var(--err); color: var(--err); }

label { display: flex; flex-direction: column; gap: 4px; font-size: 13px; color: var(--muted); margin-right: 14px; }

input, select {
  background: var(--panel2);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 8px;
  padding: 8px 10px;
  font-size: 14px;
  min-width: 0;
}
input:focus, select:focus { outline: 2px solid var(--accent); outline-offset: -1px; }
input[type="checkbox"] { width: auto; }

.row { display: flex; flex-wrap: wrap; align-items: flex-end; gap: 10px; margin-bottom: 10px; }
.row.between { justify-content: space-between; align-items: center; }
.inline { display: inline; }

button, .button {
  background: var(--accent);
  color: #fff;
  border: 0;
  border-radius: 8px;
  padding: 9px 16px;
  font-size: 14px;
  cursor: pointer;
  text-decoration: none;
  display: inline-block;
}
button:hover, .button:hover { filter: brightness(1.1); }
button.ghost { background: var(--panel2); border: 1px solid var(--border); color: var(--text); }
button.danger { color: var(--err); }

table { width: 100%; border-collapse: collapse; font-size: 13px; }
th, td { text-align: left; padding: 7px 10px; border-bottom: 1px solid var(--border); vertical-align: top; }
th { color: var(--muted); font-weight: 600; }

.channel { border: 1px solid var(--border); border-radius: 8px; padding: 12px 14px; margin-bottom: 10px; background: var(--panel2); }

.quiz-item { border: 1px solid var(--border); border-radius: 8px; padding: 10px 14px; margin-bottom: 10px; }
.correct { color: var(--ok); }
code { background: var(--panel2); padding: 1px 5px; border-radius: 5px; font-size: 12px; }

.footer { text-align: center; color: var(--muted); font-size: 12px; padding: 24px; }

@media (max-width: 720px) {
  .grid, .grid:has(.span2) { grid-template-columns: 1fr; }
  .topbar { flex-direction: column; gap: 8px; }
  nav a { margin: 0 8px; }
}