:root {
  --bg: #0a0f1f;
  --bg-soft: #101733;
  --card: #151f3f;
  --line: #253363;
  --text: #e8ecf8;
  --muted: #9ca7ca;
  --warn: #f6a400;
  --ok: #15c67a;
  --bad: #ff4f6d;
  --mono: 'Menlo', 'Monaco', 'Consolas', monospace;
  --ui: 'Segoe UI', 'Helvetica Neue', Arial, sans-serif;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  background: radial-gradient(circle at top right, #1b2a57 0%, var(--bg) 45%);
  color: var(--text);
  font-family: var(--ui);
  min-height: 100vh;
}

a { color: inherit; text-decoration: none; }

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 18px;
  border-bottom: 1px solid var(--line);
  background: rgba(16, 23, 51, 0.8);
  position: sticky;
  top: 0;
  backdrop-filter: blur(8px);
  z-index: 10;
}

.brand { font-weight: 800; color: var(--warn); }
.nav { display: flex; gap: 10px; }
.nav a {
  padding: 8px 10px;
  border: 1px solid var(--line);
  border-radius: 10px;
  font-size: 13px;
}
.nav a.danger { border-color: #6a2b3a; color: #ff8fa3; }

.page {
  padding: 18px;
  max-width: 1200px;
  margin: 0 auto;
}
.auth-page { max-width: 900px; }

.card {
  border: 1px solid var(--line);
  border-radius: 16px;
  background: linear-gradient(180deg, rgba(21,31,63,0.95), rgba(16,23,51,0.95));
  padding: 18px;
}

h1 { margin-top: 0; color: var(--warn); }
h2 { margin: 0 0 10px; font-size: 18px; }
.muted { color: var(--muted); font-size: 13px; }

.stack { display: grid; gap: 8px; }
.grid-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 10px; }
.auth-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 18px; margin: 16px 0; }

label { display: grid; gap: 6px; font-size: 13px; color: var(--muted); }
.inp {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: #0f1732;
  color: var(--text);
  padding: 10px 12px;
}

.btn {
  border: 1px solid #90651d;
  border-radius: 10px;
  padding: 10px 12px;
  background: linear-gradient(180deg, #f9b22a, #c17e00);
  color: #191919;
  font-weight: 700;
  cursor: pointer;
}
.btn.secondary {
  background: linear-gradient(180deg, #4f7ae8, #3658b4);
  border-color: #35509f;
  color: #ecf2ff;
}
.btn.success {
  background: linear-gradient(180deg, #32d693, #149963);
  border-color: #128154;
  color: #031a11;
}
.btn.ghost {
  background: transparent;
  border-color: var(--line);
  color: var(--text);
}
.btn:disabled { opacity: 0.5; cursor: not-allowed; }

.inline-form { display: flex; gap: 8px; flex-wrap: wrap; }
.inline-form .inp { flex: 1; min-width: 120px; }

.actions { display: flex; flex-wrap: wrap; gap: 8px; margin: 14px 0; }
.subsection {
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 12px;
  margin-top: 12px;
  background: rgba(15, 23, 50, 0.7);
}
.hidden { display: none; }
.status {
  min-height: 24px;
  margin-top: 8px;
  color: var(--muted);
}
.alert {
  padding: 10px;
  border-radius: 10px;
  margin: 8px 0;
}
.alert.error {
  background: rgba(255, 79, 109, 0.15);
  border: 1px solid rgba(255, 79, 109, 0.4);
  color: #ffb8c5;
}

.tag-list { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 10px; }
.tag {
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 4px 10px;
  background: rgba(37, 51, 99, 0.4);
  display: inline-flex;
  gap: 8px;
  align-items: center;
}
.tag button {
  border: 0;
  background: transparent;
  color: #ff8fa3;
  cursor: pointer;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 10px;
}
.stat {
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 10px;
  background: rgba(15, 23, 50, 0.7);
}
.stat .k { color: var(--muted); font-size: 11px; text-transform: uppercase; }
.stat .v { font-size: 20px; font-weight: 800; margin-top: 4px; }

.admin-grid {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 12px;
}
.miners-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 10px;
}
.miner {
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 10px;
  background: rgba(15, 23, 50, 0.75);
}
.miner.winner { border-color: rgba(21, 198, 122, 0.9); }

.list {
  display: grid;
  gap: 6px;
  max-height: 260px;
  overflow: auto;
}
.row {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 8px;
  background: rgba(12, 18, 38, 0.8);
}
.mono { font-family: var(--mono); font-size: 12px; }

@media (max-width: 900px) {
  .grid-3 { grid-template-columns: 1fr 1fr; }
  .auth-grid { grid-template-columns: 1fr; }
  .admin-grid { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 640px) {
  .grid-3,
  .stats-grid { grid-template-columns: 1fr; }
}