@import url('https://fonts.googleapis.com/css2?family=DM+Sans:ital,opsz,wght@0,9..40,400;0,9..40,500;0,9..40,600;0,9..40,700&family=JetBrains+Mono:wght@400;500&display=swap');

:root {
  --bg: #0b1220;
  --bg-elevated: #111827;
  --surface: #151f32;
  --surface-hover: #1a2740;
  --border: rgba(148, 163, 184, 0.14);
  --text: #f1f5f9;
  --text-muted: #94a3b8;
  --accent: #14b8a6;
  --accent-strong: #0d9488;
  --accent-glow: rgba(20, 184, 166, 0.25);
  --danger: #f87171;
  --success: #34d399;
  --warning: #fbbf24;
  --radius: 14px;
  --shadow: 0 20px 50px rgba(0, 0, 0, 0.35);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: 'DM Sans', system-ui, sans-serif;
  background: radial-gradient(1200px 600px at 10% -10%, rgba(20, 184, 166, 0.12), transparent 60%),
              radial-gradient(900px 500px at 100% 0%, rgba(59, 130, 246, 0.08), transparent 55%),
              var(--bg);
  color: var(--text);
  min-height: 100vh;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 28px;
  background: rgba(11, 18, 32, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 50;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 700;
  font-size: 17px;
  letter-spacing: -0.02em;
}

.brand img {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  box-shadow: 0 4px 14px var(--accent-glow);
}

.nav { display: flex; flex-wrap: wrap; align-items: center; gap: 4px; }

.nav a {
  color: var(--text-muted);
  text-decoration: none;
  padding: 8px 14px;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 500;
  transition: color 0.15s, background 0.15s;
}

.nav a:hover { color: var(--text); background: rgba(255,255,255,0.05); }
.nav a.active { color: var(--bg); background: var(--accent); }
.nav a.nav-logout { color: var(--danger); }
.nav a.nav-logout:hover { background: rgba(248, 113, 113, 0.12); color: var(--danger); }

.container { max-width: 1180px; margin: 0 auto; padding: 28px 20px 56px; }

.page-header { margin-bottom: 28px; }
.page-header h1 { margin: 0 0 8px; font-size: clamp(1.6rem, 3vw, 2rem); letter-spacing: -0.03em; }
.page-header p { margin: 0; color: var(--text-muted); font-size: 15px; }

.card {
  background: linear-gradient(180deg, rgba(255,255,255,0.03), rgba(255,255,255,0.01));
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  margin-bottom: 20px;
  box-shadow: var(--shadow);
}

.card-highlight {
  border-color: rgba(20, 184, 166, 0.35);
  background: linear-gradient(135deg, rgba(20, 184, 166, 0.08), rgba(59, 130, 246, 0.04));
}

h1 { margin: 0 0 16px; font-size: 24px; }
h2 { margin: 0 0 14px; font-size: 1.1rem; letter-spacing: -0.02em; }

.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 14px; }

.stat {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 18px;
}

.stat .value { font-size: 2rem; font-weight: 700; color: var(--accent); line-height: 1; }
.stat .label { font-size: 12px; color: var(--text-muted); margin-top: 8px; text-transform: uppercase; letter-spacing: 0.06em; }

label { display: block; font-weight: 600; margin-bottom: 8px; font-size: 13px; color: var(--text-muted); }

input[type="text"], input[type="password"], input[type="number"], input[type="file"], select, textarea {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--border);
  border-radius: 10px;
  font-size: 14px;
  margin-bottom: 16px;
  background: var(--bg-elevated);
  color: var(--text);
  font-family: inherit;
}

input:focus, select:focus, textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

textarea { min-height: 130px; resize: vertical; }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 18px;
  border: none;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--accent), var(--accent-strong));
  color: #042f2e;
  font-size: 14px;
  font-weight: 700;
  cursor: pointer;
  text-decoration: none;
  transition: transform 0.12s, box-shadow 0.12s;
  box-shadow: 0 8px 24px var(--accent-glow);
}

.btn:hover { transform: translateY(-1px); box-shadow: 0 12px 28px var(--accent-glow); }
.btn-secondary { background: var(--surface); color: var(--text); box-shadow: none; border: 1px solid var(--border); }
.btn-secondary:hover { background: var(--surface-hover); }
.btn-danger { background: #991b1b; color: #fff; box-shadow: none; }
.btn-small { padding: 7px 12px; font-size: 12px; }

table { width: 100%; border-collapse: collapse; font-size: 14px; }
th, td { border-bottom: 1px solid var(--border); padding: 12px 10px; text-align: left; vertical-align: top; }
th { color: var(--text-muted); font-size: 11px; text-transform: uppercase; letter-spacing: 0.06em; font-weight: 600; }

.alert { padding: 14px 16px; border-radius: 10px; margin-bottom: 18px; font-size: 14px; border: 1px solid transparent; }
.alert-success { background: rgba(52, 211, 153, 0.12); color: var(--success); border-color: rgba(52, 211, 153, 0.25); }
.alert-error { background: rgba(248, 113, 113, 0.12); color: var(--danger); border-color: rgba(248, 113, 113, 0.25); }

.login-wrap { min-height: 100vh; display: flex; align-items: center; justify-content: center; padding: 24px; }
.login-card {
  width: 100%; max-width: 420px; background: var(--surface); border: 1px solid var(--border);
  border-radius: 20px; padding: 36px 32px; box-shadow: var(--shadow); text-align: center;
}
.login-card .brand-logo { width: 72px; height: 72px; border-radius: 18px; margin: 0 auto 16px; box-shadow: 0 12px 32px var(--accent-glow); }
.login-card h1 { margin: 0 0 8px; font-size: 1.5rem; }
.login-card form { text-align: left; margin-top: 24px; }

.muted { color: var(--text-muted); font-size: 14px; }
.row { display: flex; gap: 16px; flex-wrap: wrap; }
.row > * { flex: 1; min-width: 220px; }

code, .mono { font-family: 'JetBrains Mono', monospace; font-size: 12px; background: rgba(0,0,0,0.25); padding: 2px 6px; border-radius: 6px; }

.badge { display: inline-block; padding: 4px 10px; border-radius: 999px; font-size: 10px; font-weight: 700; text-transform: uppercase; letter-spacing: 0.04em; }
.badge-pending { background: rgba(251, 191, 36, 0.15); color: var(--warning); }
.badge-sent, .badge-completed { background: rgba(52, 211, 153, 0.15); color: var(--success); }
.badge-failed { background: rgba(248, 113, 113, 0.15); color: var(--danger); }
.badge-queued, .badge-sending { background: rgba(96, 165, 250, 0.15); color: #93c5fd; }
.badge-draft { background: rgba(148, 163, 184, 0.15); color: var(--text-muted); }
.badge-online { background: rgba(52, 211, 153, 0.15); color: var(--success); }
.badge-offline { background: rgba(248, 113, 113, 0.15); color: var(--danger); }

.steps { display: grid; gap: 16px; }
.step { display: flex; gap: 16px; align-items: flex-start; padding: 18px; background: var(--surface); border: 1px solid var(--border); border-radius: 12px; }
.step-num { flex-shrink: 0; width: 32px; height: 32px; border-radius: 50%; background: var(--accent); color: #042f2e; font-weight: 800; display: flex; align-items: center; justify-content: center; font-size: 14px; }
.qr-wrap { text-align: center; padding: 24px; background: #fff; border-radius: 16px; display: inline-block; }
.qr-wrap img { display: block; border-radius: 8px; }
.mobile-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.status-pill { display: inline-flex; align-items: center; gap: 8px; padding: 8px 14px; border-radius: 999px; background: var(--surface); border: 1px solid var(--border); font-size: 13px; }
.status-dot { width: 8px; height: 8px; border-radius: 50%; background: var(--success); box-shadow: 0 0 8px var(--success); }
.status-dot.off { background: var(--danger); box-shadow: 0 0 8px var(--danger); }
.pair-page { min-height: 100vh; padding: 24px 16px 48px; max-width: 480px; margin: 0 auto; }
.pair-page .brand { justify-content: center; margin-bottom: 24px; }
.download-btn { width: 100%; padding: 16px; font-size: 16px; }

@media (max-width: 800px) {
  .mobile-grid { grid-template-columns: 1fr; }
  .topbar { flex-direction: column; gap: 12px; align-items: flex-start; }
}