:root {
  --bg: #f4f6fa;
  --card: #ffffff;
  --ink: #16233a;
  --muted: #67748c;
  --line: #e3e8f0;
  --accent: #2456e6;
  --accent-ink: #ffffff;
  --good: #128a5c;
  --good-bg: #e6f6ee;
  --bad: #c23737;
  --bad-bg: #fdecec;
  --warn-bg: #fff6e2;
  --shadow: 0 1px 2px rgba(18, 32, 60, .06), 0 8px 24px rgba(18, 32, 60, .06);
}
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  background: var(--bg);
  color: var(--ink);
  font: 15px/1.5 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}
.wrap { max-width: 1080px; margin: 0 auto; padding: 0 20px; }
h1, h2, h3 { margin: 0 0 10px; font-weight: 650; letter-spacing: -.01em; }
h2 { font-size: 19px; }
h3 { font-size: 16px; margin-top: 26px; }
.muted { color: var(--muted); font-size: 13.5px; margin: 4px 0 14px; }
a { color: var(--accent); }

/* --- login --- */
.login-wrap { min-height: 100vh; display: flex; align-items: center; justify-content: center; }
.login-card { width: 380px; padding: 34px 30px; text-align: center; }
.login-card .logo, .brand { font-weight: 800; letter-spacing: .04em; }
.login-card .logo { font-size: 22px; margin-bottom: 18px; }
.login-card .logo span, .brand span { color: var(--accent); }
.login-card form { display: flex; flex-direction: column; gap: 12px; margin-top: 18px; }
.login-card input {
  padding: 13px 14px; border: 1px solid var(--line); border-radius: 10px; font-size: 15px; outline: none;
}
.login-card input:focus { border-color: var(--accent); }

/* --- topbar --- */
.topbar { background: #101b33; color: #eaf0ff; margin-bottom: 26px; }
.topbar-inner { display: flex; align-items: center; justify-content: space-between; padding: 14px 20px; gap: 16px; flex-wrap: wrap; }
.brand { font-size: 17px; }
.brand em { font-style: normal; font-weight: 400; opacity: .65; font-size: 13px; margin-left: 10px; letter-spacing: 0; }
.topbar-right { display: flex; align-items: center; gap: 14px; }
.balance-box {
  background: rgba(255,255,255,.08); border: 1px solid rgba(255,255,255,.14);
  border-radius: 10px; padding: 7px 14px; font-size: 13.5px; color: #c8d4f2;
}
.balance-box strong { color: #fff; font-size: 16px; margin-left: 6px; }
.who { opacity: .8; font-size: 14px; }

/* --- cards --- */
.card {
  background: var(--card); border: 1px solid var(--line); border-radius: 14px;
  padding: 22px 22px 18px; margin-bottom: 22px; box-shadow: var(--shadow);
}
.card-head { display: flex; align-items: center; gap: 10px; }
.pill {
  background: var(--bg); border: 1px solid var(--line); color: var(--muted);
  border-radius: 999px; padding: 2px 11px; font-size: 12.5px; font-weight: 600;
}

/* --- form --- */
.send-form { display: grid; grid-template-columns: 1fr 1.3fr; gap: 16px; }
.send-form label { display: block; font-size: 13px; color: var(--muted); font-weight: 600; }
.send-form input, .send-form textarea, .admin-actions input {
  width: 100%; margin-top: 7px; padding: 11px 12px; border: 1px solid var(--line);
  border-radius: 10px; font-size: 15px; color: var(--ink); outline: none; resize: vertical;
}
.send-form input:focus, .send-form textarea:focus { border-color: var(--accent); }
.counter { display: block; text-align: right; font-size: 12px; color: var(--muted); margin-top: 4px; }

/* --- buttons --- */
.btn {
  background: var(--accent); color: var(--accent-ink); border: 0; border-radius: 10px;
  padding: 11px 18px; font-size: 14.5px; font-weight: 600; cursor: pointer;
}
.btn:hover { filter: brightness(1.07); }
.btn:disabled { opacity: .55; cursor: default; filter: none; }
.btn.ghost {
  background: transparent; color: #dfe7fb; border: 1px solid rgba(255,255,255,.22);
}
.btn.small { padding: 7px 12px; font-size: 13px; border-radius: 8px; }
.btn.tiny { padding: 5px 10px; font-size: 12.5px; border-radius: 7px; }
.btn.danger { background: var(--bad); }
.btn.okbtn { background: var(--good); }

/* --- tables --- */
.table-scroll { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: 14px; }
th, td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--line); white-space: nowrap; }
th { font-size: 12px; text-transform: uppercase; letter-spacing: .05em; color: var(--muted); font-weight: 700; }
tbody tr:hover { background: #f8fafd; }
td.num { font-variant-numeric: tabular-nums; font-weight: 600; }
td.msg { white-space: normal; min-width: 180px; }

.status { display: inline-block; border-radius: 999px; padding: 2px 10px; font-size: 12px; font-weight: 700; }
.status.sent { background: var(--good-bg); color: var(--good); }
.status.failed { background: var(--bad-bg); color: var(--bad); }
.status.pending { background: var(--warn-bg); color: #9a6b12; }

/* --- messages --- */
.error, .ok {
  display: none; margin-top: 12px; padding: 11px 14px; border-radius: 10px; font-size: 14px;
}
.error.show { display: block; background: var(--bad-bg); color: var(--bad); }
.ok.show { display: block; background: var(--good-bg); color: var(--good); }

/* --- admin --- */
.admin-card { border-color: #d9e2f5; }
.admin-actions { display: flex; gap: 10px; align-items: center; margin: 8px 0 16px; flex-wrap: wrap; }
.admin-actions input { max-width: 260px; margin-top: 0; }
.chk { display: flex; align-items: center; gap: 6px; font-size: 13.5px; color: var(--muted); }
.bal-edit { display: inline-flex; gap: 6px; align-items: center; }
.bal-edit input { width: 110px; padding: 6px 8px; border: 1px solid var(--line); border-radius: 8px; font-size: 13px; }
.token-secret {
  display: block; background: #101b33; color: #9fe9c4; padding: 12px 14px; border-radius: 10px;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: 13px; word-break: break-all; margin-top: 10px;
}

@media (max-width: 760px) {
  .send-form { grid-template-columns: 1fr; }
}