:root {
  --bg: #0b1120;
  --panel: #111827;
  --panel-light: #1a2333;
  --border: #1f2a3c;
  --text: #e5e7eb;
  --text-dim: #94a3b8;
  --accent: #38bdf8;
  --accent-dim: #0c3a55;
  --green: #34d399;
  --red: #f87171;
  --yellow: #fbbf24;
  --radius: 12px;
  --nv-green-bg: #06362a;
  --nv-red-bg: #3b1414;
  --nv-input: #0e1626;
  --nv-hover: #162033;
}
:root[data-theme="light"] {
  --bg: #f1f5f9;
  --panel: #ffffff;
  --panel-light: #f8fafc;
  --border: #e2e8f0;
  --text: #0f172a;
  --text-dim: #64748b;
  --accent: #2563eb;
  --accent-dim: #dbeafe;
  --green: #059669;
  --red: #dc2626;
  --yellow: #b45309;
  --nv-green-bg: #d1fae5;
  --nv-red-bg: #fee2e2;
  --nv-input: #ffffff;
  --nv-hover: #f1f5f9;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: "Inter", "Segoe UI", system-ui, -apple-system, Roboto, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--accent); }

.sidebar { background: var(--panel); border-right: 1px solid var(--border); }
.sidebar .brand { color: var(--text); letter-spacing: .2px; }
.sidebar .brand span { color: var(--accent); }
.sidebar nav a {
  display: block; margin: 2px 10px; padding: 10px 14px;
  border-radius: 10px; color: var(--text-dim);
  border-left: 3px solid transparent;
}
.sidebar nav a:hover { background: var(--nv-hover); color: var(--text); }
.sidebar nav a.active {
  background: var(--accent-dim); color: var(--accent);
  border-left-color: var(--accent); font-weight: 600;
}
.sidebar .logout { border-top: 1px solid var(--border); }

.main { background: var(--bg); }
.topbar { border-bottom: 1px solid var(--border); padding-bottom: 14px; margin-bottom: 20px; }
.topbar h1 { font-size: 24px; font-weight: 700; letter-spacing: -.3px; color: var(--text); }
.topbar .who { color: var(--text-dim); }

.cards { gap: 16px; }
.card {
  background: var(--panel); border: 1px solid var(--border);
  border-radius: 14px; padding: 18px 20px;
}
.card .label { color: var(--text-dim); font-size: 13px; text-transform: none; letter-spacing: 0; }
.card .value { font-size: 30px; font-weight: 700; letter-spacing: -.5px; margin-top: 6px; }
.card .value.green { color: var(--green); }
.card .value.blue { color: var(--accent); }
.card .value.yellow { color: var(--yellow); }
.card .value.red { color: var(--red); }

.panel {
  background: var(--panel); border: 1px solid var(--border);
  border-radius: 14px; padding: 20px 22px; margin-bottom: 18px;
}
.panel h2 { font-size: 17px; font-weight: 700; color: var(--text); margin-bottom: 14px; }

table { width: 100%; border-collapse: collapse; }
th, td { padding: 12px 14px; border-bottom: 1px solid var(--border); text-align: left; }
th {
  color: var(--text-dim); font-size: 12px; font-weight: 600;
  text-transform: none; letter-spacing: .2px; background: transparent;
}
td { color: var(--text); font-size: 14px; }
tr:hover td { background: var(--nv-hover); }

.badge { display: inline-block; padding: 3px 10px; border-radius: 999px; font-size: 12px; font-weight: 600; }
.badge.online { background: var(--nv-green-bg); color: var(--green); }
.badge.offline { background: var(--panel-light); color: var(--text-dim); border: 1px solid var(--border); }

.form-group label { color: var(--text-dim); font-size: 13px; font-weight: 600; }
.form-group input, .form-group select, input[type="text"], input[type="date"],
input[type="number"], input[type="password"], select {
  background: var(--nv-input); color: var(--text);
  border: 1px solid var(--border); border-radius: 10px; padding: 10px 12px;
}
.form-group input:focus, .form-group select:focus, input:focus, select:focus {
  outline: none; border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-dim);
}

.btn {
  background: var(--accent); color: #ffffff; border: none;
  border-radius: 10px; padding: 10px 18px; font-weight: 600; cursor: pointer;
}
:root:not([data-theme="light"]) .btn { color: #04121f; }
.btn:hover { filter: brightness(1.08); }
.btn.secondary { background: transparent; color: var(--text); border: 1px solid var(--border); }
.btn.secondary:hover { background: var(--nv-hover); }
.btn.danger { background: var(--red); color: #ffffff; }

.success-msg {
  background: var(--nv-green-bg); color: var(--green);
  border: 1px solid var(--green); border-radius: 10px; padding: 12px 14px;
}
.error-msg {
  background: var(--nv-red-bg); color: var(--red);
  border: 1px solid var(--red); border-radius: 10px; padding: 12px 14px;
}
code { background: var(--panel-light); color: var(--accent); padding: 2px 6px; border-radius: 6px; }

#netvocha-saa { background: var(--panel-light) !important; border: 1px solid var(--border); color: var(--text); }

.nv-theme-toggle {
  display: block; width: calc(100% - 20px); margin: 8px 10px;
  padding: 9px 12px; border-radius: 10px; cursor: pointer;
  background: var(--panel-light); color: var(--text);
  border: 1px solid var(--border); font-size: 13px; font-weight: 600;
}
.nv-theme-toggle:hover { border-color: var(--accent); }

* { scrollbar-width: thin; scrollbar-color: var(--border) transparent; }

/* NV-COMPACT-MOBILE */
/* ---------- Maumbo madogo zaidi (kila mahali) ---------- */
.topbar h1 { font-size: 20px; }
.panel { padding: 16px 18px; }
.panel h2 { font-size: 15px; margin-bottom: 10px; }
.cards { gap: 12px; }
.card { padding: 14px 16px; }
.card .label { font-size: 12px; }
.card .value { font-size: 24px; margin-top: 4px; }
th, td { padding: 9px 12px; }
td { font-size: 13px; }

/* Hotspot / PPPoE */
.panel .nvo-safu { gap: 8px; margin-top: 6px; }
.panel .nvo-aina { padding: 10px 14px; border-radius: 10px; }
.panel .nvo-alama { width: 30px; height: 30px; font-size: 14px; border-radius: 8px; }
.panel .nvo-jina { gap: 10px; }
.panel .nvo-jina b { font-size: 14px; }
.panel .nvo-jina small { font-size: 11px; }
.panel .nvo-idadi { font-size: 24px; }
.panel .nvo-kiungo { margin-top: 8px; font-size: 13px; }

/* Grafu ya mwezi */
.panel .nvg-takwimu { gap: 8px; margin: 12px 0 14px; }
.panel .nvg-takwimu > div { padding: 8px 12px; border-radius: 10px; }
.panel .nvg-takwimu small { font-size: 11px; margin-bottom: 2px; }
.panel .nvg-takwimu b { font-size: 15px; }
.panel .nvg-y, .panel .nvg-plot { height: 180px; }
.panel .nvg-bar { max-width: 40px; }
.panel .nvg-thamani { font-size: 10px; }
.panel .nvg-lebo div { font-size: 11px; }
.panel .nvg-vitufe a { padding: 5px 10px; font-size: 12px; }

/* Saa na kitufe cha mandhari */
#netvocha-saa { padding: 8px 10px !important; margin: 4px 10px 10px !important; }
#netvocha-saa #nv-saa { font-size: 18px !important; }
.nv-theme-toggle { padding: 7px 10px; font-size: 12px; }

/* ---------- Simu (skrini ndogo) ---------- */
@media (max-width: 768px) {
  .app { flex-direction: column !important; display: flex !important; }
  .sidebar {
    position: static !important; width: 100% !important; height: auto !important;
    min-height: 0 !important; border-right: none !important; border-bottom: 1px solid var(--border);
    padding: 8px 0 !important;
  }
  .sidebar .brand { padding: 6px 12px !important; font-size: 16px; }
  .sidebar nav {
    display: flex !important; flex-wrap: nowrap; overflow-x: auto;
    gap: 4px; padding: 4px 8px; -webkit-overflow-scrolling: touch;
  }
  .sidebar nav a {
    white-space: nowrap; margin: 0 !important; padding: 8px 12px !important;
    border-left: none !important; border-bottom: 3px solid transparent; font-size: 13px;
  }
  .sidebar nav a.active { border-bottom-color: var(--accent); }
  .sidebar .logout { border-top: none !important; padding: 4px 12px !important; }
  #netvocha-saa { display: flex !important; justify-content: center; gap: 10px; align-items: baseline; margin: 4px 10px 6px !important; }
  #netvocha-saa #nv-saa { font-size: 15px !important; }
  .nv-theme-toggle { width: auto; display: inline-block; margin: 4px 10px; }

  .main { margin-left: 0 !important; padding: 12px !important; width: 100% !important; box-sizing: border-box; }
  .topbar { flex-wrap: wrap; gap: 6px; margin-bottom: 12px; }
  .topbar h1 { font-size: 18px; }

  .cards { display: grid !important; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 8px; }
  .card { padding: 10px 12px; }
  .card .value { font-size: 18px; }
  .card .label { font-size: 11px; }

  .panel { padding: 12px; overflow-x: auto; }
  table { font-size: 12px; }
  th, td { padding: 8px; white-space: nowrap; }
  .form-row { flex-direction: column; }

  .panel .nvo-idadi { font-size: 20px; }
  .panel .nvg-takwimu { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .panel .nvg-takwimu b { font-size: 13px; }
  .panel .nvg-y, .panel .nvg-plot { height: 150px; }
  .panel .nvg-y { width: 32px; }
  .panel .nvg-safu, .panel .nvg-lebo { gap: 6px !important; }
  .panel .nvg-lebo { padding-left: 42px; }
  .panel .nvg-lebo div { font-size: 10px; }
}