:root {
  --bg: #090e18;
  --sidebar: #0d1421;
  --panel: #111b2b;
  --panel-light: #162338;
  --border: #26354a;
  --text: #edf3fc;
  --muted: #91a2b9;
  --green: #3ee0a0;
  --blue: #6aa9ff;
  --red: #ff7777;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: Inter, "Segoe UI", Arial, sans-serif;
  font-size: 14px;
}

button, input, select { font: inherit; }
button { cursor: pointer; }

.app { display: flex; min-height: 100vh; }

.sidebar {
  width: 245px;
  flex-shrink: 0;
  background: var(--sidebar);
  border-right: 1px solid var(--border);
  padding: 25px 16px;
  display: flex;
  flex-direction: column;
}

.brand { display: flex; align-items: center; gap: 11px; padding: 0 7px 32px; }
.brand-icon {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  background: #183b38;
  color: var(--green);
  border-radius: 12px;
  font-size: 23px;
}
.brand h2 { font-size: 15px; letter-spacing: 1px; margin: 0 0 5px; }
.brand p, .eyebrow, .menu-label { color: var(--muted); font-size: 10px; letter-spacing: 1.5px; margin: 0; }
.menu-label { margin: 0 10px 12px; }

.nav-link {
  display: block;
  text-align: left;
  width: 100%;
  color: #a9b8cb;
  background: transparent;
  border: 1px solid transparent;
  border-radius: 8px;
  padding: 13px 12px;
  margin: 3px 0;
}
.nav-link:hover, .nav-link.active {
  color: var(--text);
  background: #18263a;
  border-color: #293d55;
}
.nav-link.active { box-shadow: inset 3px 0 var(--green); }

.sidebar-bottom {
  margin-top: auto;
  border-top: 1px solid var(--border);
  padding: 22px 8px 0;
  color: var(--muted);
  font-size: 12px;
}
.sidebar-bottom p { font-size: 11px; }

.status-dot {
  display: inline-block;
  width: 8px;
  height: 8px;
  background: var(--green);
  border-radius: 50%;
  margin-right: 7px;
  box-shadow: 0 0 9px #3ee0a055;
}

.main { min-width: 0; flex: 1; padding: 27px 32px; }

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 27px;
}
.topbar h1 { margin: 7px 0 0; font-size: 27px; }
.network-pill, .tag {
  border: 1px solid #285344;
  background: #102a26;
  color: var(--green);
  padding: 9px 12px;
  border-radius: 20px;
  font-size: 11px;
  white-space: nowrap;
}
.tag { border-radius: 6px; padding: 6px 9px; }

.page { display: none; }
.page.active-page { display: block; }

.welcome {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 20px;
  padding: 27px;
  background: linear-gradient(120deg, #14283a, #111b2b 70%);
  border: 1px solid var(--border);
  border-radius: 14px;
  margin-bottom: 20px;
}
.welcome h2 { font-size: 22px; margin: 10px 0; }
.welcome p:not(.eyebrow), .section-intro p { color: var(--muted); line-height: 1.6; }

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 15px;
  margin-bottom: 20px;
}
.stat-card, .panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px;
  min-width: 0;
}
.stat-card > p { color: var(--muted); margin: 0 0 15px; }
.stat-card h2 { font-size: 26px; margin: 0 0 12px; overflow-wrap: anywhere; }
.stat-card h2 small, .big-number small { color: var(--muted); font-size: 13px; }
.stat-card > span { color: var(--muted); font-size: 11px; }

.content-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
  align-items: start;
}
.panel-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 20px;
}
.panel-heading h3 { margin: 0 0 6px; font-size: 15px; }
.panel-heading p { margin: 0; color: var(--muted); font-size: 12px; }

.station-list { display: grid; gap: 10px; }
.station-row, .transaction-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  padding: 13px;
  border: 1px solid var(--border);
  border-radius: 8px;
}
.station-row strong, .transaction-row strong { display: block; margin-bottom: 5px; }
.station-row small, .transaction-row small { color: var(--muted); }
.online-label { color: var(--green); font-size: 11px; white-space: nowrap; }

.text-btn { color: var(--blue); background: none; border: 0; padding: 5px; }
.primary-btn, .secondary-btn, .danger-btn {
  border-radius: 8px;
  padding: 12px 16px;
  font-weight: 650;
  border: 1px solid transparent;
}
.primary-btn { color: #071610; background: var(--green); }
.primary-btn:hover { filter: brightness(1.08); }
.secondary-btn { background: #1a2a40; color: var(--text); border-color: var(--border); }
.danger-btn { background: #3a1e29; color: #ffaaaa; border-color: #6c3441; }
button:disabled { opacity: .4; cursor: not-allowed; }
.full-btn { width: 100%; margin-top: 12px; }
.notice { color: var(--muted); font-size: 11px; line-height: 1.6; margin-top: 18px; }

.section-intro { margin-bottom: 20px; }
.section-intro h2 { margin: 0 0 7px; font-size: 22px; }
.section-intro p { margin: 0; }

.station-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 15px;
}
.station-card {
  padding: 22px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
}
.station-card h3 { margin: 13px 0 8px; }
.station-card p { color: var(--muted); line-height: 1.6; }
.station-card .station-power { color: var(--green); font-size: 22px; font-weight: 700; }

form label { display: block; color: #c8d5e7; margin: 18px 0 8px; }
input, select {
  width: 100%;
  background: #0b1320;
  color: var(--text);
  border: 1px solid #2c3d54;
  border-radius: 7px;
  padding: 12px;
  outline: none;
}
input:focus, select:focus { border-color: var(--green); }
form label:first-of-type { margin-top: 0; }
.form-message { color: var(--muted); font-size: 12px; line-height: 1.5; }

.telemetry-label { color: var(--muted); }
.big-number { font-size: 38px; margin: 10px 0 17px; }
.progress-track { height: 6px; border-radius: 6px; background: #243349; overflow: hidden; margin-bottom: 25px; }
.progress-fill { height: 100%; width: 0%; background: var(--green); transition: width .3s; }
.telemetry-row { display: flex; justify-content: space-between; gap: 15px; padding: 13px 0; border-bottom: 1px solid var(--border); }
.telemetry-row span { color: var(--muted); }
.telemetry-row strong { text-align: right; overflow-wrap: anywhere; }
.callout { background: #122b2a; color: #a8e7d1; border: 1px solid #28534a; border-radius: 8px; padding: 14px; line-height: 1.6; margin-top: 20px; font-size: 12px; }
.callout.warning { background: #302719; border-color: #5c482b; color: #f1d7a3; margin-top: 18px; }

.table-wrap { overflow-x: auto; }
table { border-collapse: collapse; width: 100%; text-align: left; }
th, td { padding: 13px 10px; border-bottom: 1px solid var(--border); vertical-align: top; }
th { color: var(--muted); font-size: 11px; font-weight: 600; }
td { font-size: 12px; }
.hash { max-width: 210px; overflow-wrap: anywhere; color: #9fc8ff; font-family: monospace; font-size: 11px; }
.empty-state { padding: 25px 10px; color: var(--muted); text-align: center; line-height: 1.6; }
.verification-summary { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 15px; margin-bottom: 18px; }
.result-item { padding: 15px; margin: 10px 0; border: 1px solid var(--border); border-radius: 8px; overflow-wrap: anywhere; }
.result-pass { border-left: 3px solid var(--green); }
.result-fail { border-left: 3px solid var(--red); }
.result-item p { color: var(--muted); line-height: 1.5; }
.pass-text { color: var(--green); }
.fail-text { color: var(--red); }

@media (max-width: 1050px) {
  .sidebar { width: 210px; }
  .main { padding: 22px; }
  .stats-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 760px) {
  .app { display: block; }
  .sidebar { width: 100%; padding: 15px; }
  .brand { padding-bottom: 15px; }
  .menu-label, .sidebar-bottom { display: none; }
  .sidebar { display: block; }
  .nav-link { display: inline-block; width: auto; padding: 10px; font-size: 12px; }
  .main { padding: 18px 14px; }
  .topbar { align-items: flex-start; }
  .topbar h1 { font-size: 23px; }
  .network-pill { font-size: 10px; padding: 8px; }
  .content-grid, .station-grid { grid-template-columns: 1fr; }
  .welcome { display: block; padding: 20px; }
  .welcome .primary-btn { margin-top: 12px; }
  .stats-grid { gap: 10px; }
  .stat-card, .panel { padding: 15px; }
  .stat-card h2 { font-size: 22px; }
  .verification-summary { gap: 8px; }
  .verification-summary .stat-card { padding: 12px; }
  .verification-summary .stat-card h2 { font-size: 21px; }
}

/* Station status and hover effect */

.station-in-use {
  border-color: #a86b32 !important;
  background: #241e19 !important;
}

.in-use-label {
  color: #ffbd70;
  font-size: 11px;
  font-weight: 700;
  white-space: nowrap;
}

.in-use-tag {
  color: #ffbd70;
  background: #392719;
  border-color: #a86b32;
}

.station-row,
.station-card {
  transition: border-color 0.2s ease, background 0.2s ease;
}

.station-row:hover,
.station-card:hover {
  border-color: #3ee0a0;
}

.station-row.station-in-use:hover,
.station-card.station-in-use:hover {
  border-color: #ffbd70 !important;
}

.station-card button:disabled {
  color: #ffbd70;
  background: #392719;
  border-color: #a86b32;
  opacity: 1;
  cursor: not-allowed;
}