:root {
  --bg: #060b16;
  --bg-soft: #0a1324;
  --card: #0d1730;
  --card-border: #1b2a4a;
  --blue: #2e9bff;
  --blue-bright: #58c4ff;
  --blue-deep: #0a58ff;
  --text: #e8eefc;
  --text-muted: #8aa0c7;
  --danger: #ff5470;
  --success: #34d399;
  --radius: 14px;
  --shadow-glow: 0 0 24px rgba(46, 155, 255, 0.25);
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: 'Segoe UI', Roboto, Inter, Arial, sans-serif;
  min-height: 100%;
}

body {
  background-image:
    radial-gradient(ellipse 900px 500px at 50% -10%, rgba(46, 155, 255, 0.16), transparent 60%),
    linear-gradient(rgba(46, 155, 255, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(46, 155, 255, 0.06) 1px, transparent 1px);
  background-size: auto, 42px 42px, 42px 42px;
  background-position: 0 0, 0 0, 0 0;
  background-attachment: fixed;
}

a { color: var(--blue-bright); text-decoration: none; }
a:hover { text-decoration: underline; }

.container { max-width: 1100px; margin: 0 auto; padding: 0 20px; }

/* ---------- Navbar ---------- */
.navbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 0;
  border-bottom: 1px solid var(--card-border);
  background: rgba(6, 11, 22, 0.85);
  backdrop-filter: blur(6px);
  position: sticky;
  top: 0;
  z-index: 20;
}
.navbar .brand { display: flex; align-items: center; gap: 10px; font-weight: 800; font-size: 20px; }
.navbar .brand img { height: 34px; width: 34px; border-radius: 8px; }
.navbar nav a {
  color: var(--text-muted);
  margin-left: 22px;
  font-weight: 600;
  font-size: 14px;
}
.navbar nav a:hover, .navbar nav a.active { color: var(--blue-bright); text-decoration: none; }
.navbar .balance-pill {
  background: linear-gradient(135deg, var(--blue-deep), var(--blue));
  padding: 6px 14px;
  border-radius: 999px;
  font-weight: 700;
  font-size: 14px;
  box-shadow: var(--shadow-glow);
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 22px;
  border-radius: 10px;
  font-weight: 700;
  font-size: 15px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 0.12s ease, box-shadow 0.12s ease;
}
.btn:hover { text-decoration: none; }
.btn-primary {
  background: linear-gradient(135deg, var(--blue-deep), var(--blue-bright));
  color: #04101f;
  box-shadow: var(--shadow-glow);
}
.btn-primary:hover { transform: translateY(-1px); }
.btn-outline {
  background: transparent;
  border-color: var(--card-border);
  color: var(--text);
}
.btn-outline:hover { border-color: var(--blue); color: var(--blue-bright); }
.btn-danger { background: var(--danger); color: #200; }
.btn-sm { padding: 7px 14px; font-size: 13px; }
.btn[disabled] { opacity: 0.5; cursor: not-allowed; }

/* ---------- Cards ---------- */
.card {
  background: linear-gradient(180deg, var(--card), var(--bg-soft));
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  padding: 24px;
}
.card + .card { margin-top: 18px; }
.grid { display: grid; gap: 18px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
@media (max-width: 800px) {
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
}

.badge {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 700;
}
.badge-success { background: rgba(52, 211, 153, 0.15); color: var(--success); }
.badge-danger { background: rgba(255, 84, 112, 0.15); color: var(--danger); }
.badge-muted { background: rgba(138, 160, 199, 0.15); color: var(--text-muted); }
.badge-blue { background: rgba(46, 155, 255, 0.15); color: var(--blue-bright); }

/* ---------- Forms ---------- */
label { display: block; font-size: 13px; color: var(--text-muted); margin-bottom: 6px; font-weight: 600; }
input, select, textarea {
  width: 100%;
  padding: 11px 13px;
  border-radius: 9px;
  border: 1px solid var(--card-border);
  background: var(--bg-soft);
  color: var(--text);
  font-size: 15px;
  margin-bottom: 16px;
}
input:focus, select:focus, textarea:focus {
  outline: none;
  border-color: var(--blue);
  box-shadow: 0 0 0 3px rgba(46, 155, 255, 0.15);
}
.form-narrow { max-width: 420px; margin: 0 auto; }
.errors { color: var(--danger); margin-bottom: 14px; font-size: 14px; }
.errors li { margin-bottom: 4px; }
.hint { color: var(--text-muted); font-size: 13px; margin-top: -10px; margin-bottom: 16px; }

/* ---------- Tables ---------- */
table { width: 100%; border-collapse: collapse; font-size: 14px; }
th, td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--card-border); }
th { color: var(--text-muted); font-weight: 700; font-size: 12px; text-transform: uppercase; letter-spacing: 0.04em; }
tr:hover td { background: rgba(46, 155, 255, 0.04); }

/* ---------- Hero ---------- */
.hero { text-align: center; padding: 90px 20px 60px; }
.hero img.logo-big { width: 130px; margin-bottom: 24px; filter: drop-shadow(0 0 30px rgba(46,155,255,0.5)); }
.hero h1 { font-size: 42px; margin: 0 0 14px; }
.hero p { color: var(--text-muted); font-size: 18px; max-width: 620px; margin: 0 auto 30px; }
.hero .cta { display: flex; gap: 14px; justify-content: center; }

.section-title { font-size: 26px; margin-bottom: 6px; }
.section-sub { color: var(--text-muted); margin-bottom: 26px; }

/* ---------- Admin layout ---------- */
.admin-layout { display: flex; min-height: calc(100vh - 68px); }
.admin-sidebar {
  width: 220px;
  border-right: 1px solid var(--card-border);
  padding: 24px 0;
}
.admin-sidebar a {
  display: block;
  padding: 10px 24px;
  color: var(--text-muted);
  font-weight: 600;
  font-size: 14px;
}
.admin-sidebar a:hover, .admin-sidebar a.active {
  color: var(--blue-bright);
  background: rgba(46, 155, 255, 0.08);
  text-decoration: none;
}
.admin-content { flex: 1; padding: 30px; max-width: 1100px; }

.stat-box { text-align: center; }
.stat-box .num { font-size: 30px; font-weight: 800; color: var(--blue-bright); }
.stat-box .label { color: var(--text-muted); font-size: 13px; margin-top: 4px; }

footer.site-footer {
  border-top: 1px solid var(--card-border);
  padding: 30px 0;
  margin-top: 60px;
  color: var(--text-muted);
  font-size: 13px;
  text-align: center;
}

.device-counter {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 16px;
}
.device-counter button {
  width: 38px; height: 38px;
  border-radius: 9px;
  border: 1px solid var(--card-border);
  background: var(--bg-soft);
  color: var(--text);
  font-size: 18px;
  cursor: pointer;
}
.device-counter .count { font-size: 20px; font-weight: 800; min-width: 30px; text-align: center; }

.price-tag { font-size: 30px; font-weight: 800; color: var(--blue-bright); }
.price-tag small { font-size: 14px; color: var(--text-muted); font-weight: 600; }

.duration-tabs { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 4px; }
.duration-btn {
  padding: 8px 14px;
  border-radius: 8px;
  border: 1px solid var(--card-border);
  background: var(--bg-soft);
  color: var(--text-muted);
  font-weight: 700;
  font-size: 13px;
  cursor: pointer;
  transition: all 0.12s ease;
}
.duration-btn:hover { border-color: var(--blue); color: var(--blue-bright); }
.duration-btn.active {
  background: linear-gradient(135deg, var(--blue-deep), var(--blue-bright));
  color: #04101f;
  border-color: transparent;
  box-shadow: var(--shadow-glow);
}