:root {
  --bg: #0f1115;
  --surface: #171a21;
  --surface-hover: #1e222b;
  --border: #2a2f3a;
  --accent: #3b82f6;
  --accent-dark: #1d4ed8;
  --text: #e5e7eb;
  --text-muted: #8b93a3;
  --success: #22c55e;
  --danger: #ef4444;
  --radius: 12px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background:
    radial-gradient(circle at 15% 20%, rgba(59,130,246,0.25), transparent 40%),
    radial-gradient(circle at 85% 10%, rgba(249,115,22,0.18), transparent 45%),
    radial-gradient(circle at 50% 90%, rgba(34,197,94,0.12), transparent 40%),
    var(--bg);
  color: var(--text);
  min-height: 100vh;
}

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

/* HEADER */
.header {
  background: linear-gradient(90deg, rgba(29,78,216,0.55), rgba(59,130,246,0.55));
  backdrop-filter: blur(16px) saturate(150%);
  -webkit-backdrop-filter: blur(16px) saturate(150%);
  border-bottom: 1px solid rgba(255,255,255,0.12);
  padding: 12px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.header .brand { display: flex; align-items: center; gap: 10px; font-weight: 600; font-size: 15px; }
.header .stats { display: flex; gap: 10px; }
.stat-pill {
  background: rgba(255,255,255,0.15);
  border-radius: 8px;
  padding: 6px 14px;
  text-align: center;
  min-width: 70px;
}
.stat-pill .label { font-size: 10px; opacity: 0.85; }
.stat-pill .value { font-size: 17px; font-weight: 600; }

/* BODY LAYOUT */
.body { display: flex; flex: 1; overflow: hidden; }

.sidebar {
  width: 100px;
  background: rgba(23,26,33,0.45);
  backdrop-filter: blur(16px) saturate(150%);
  -webkit-backdrop-filter: blur(16px) saturate(150%);
  border-right: 1px solid rgba(255,255,255,0.08);
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 16px 0;
  gap: 22px;
}
.sidebar button {
  background: none;
  border: 1px solid transparent;
  color: var(--text-muted);
  cursor: pointer;
  padding: 10px 6px;
  border-radius: 12px;
  transition: 0.2s;
  width: 84px;
  height: 66px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
}
.sidebar button:hover {
  color: var(--text);
  background: rgba(255,255,255,0.08);
  border-color: rgba(255,255,255,0.1);
}
.sidebar button.active {
  color: white;
  background: rgba(59,130,246,0.35);
  border-color: rgba(59,130,246,0.5);
  box-shadow: 0 0 16px rgba(59,130,246,0.35);
}

.content { flex: 1; overflow-y: auto; padding: 20px; }

/* CARDS */
.client-card {
  border: 1px solid rgba(255,255,255,0.10);
  border-radius: var(--radius);
  padding: 14px 16px;
  margin-bottom: 14px;
  background: rgba(23,26,33,0.45);
  backdrop-filter: blur(14px) saturate(140%);
  -webkit-backdrop-filter: blur(14px) saturate(140%);
  box-shadow: 0 4px 24px rgba(0,0,0,0.25);
}
.client-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 10px;
}
.client-card-title { display: flex; align-items: center; gap: 8px; font-weight: 600; font-size: 14px; }
.client-card-title .count { font-size: 11px; color: var(--text-muted); font-weight: 400; }

.peer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 12px;
}
.peer-tile {
  background: rgba(255,255,255,0.05);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-radius: 10px;
  padding: 16px 18px;
  font-size: 14px;
  cursor: pointer;
  border: 1px solid rgba(255,255,255,0.08);
  transition: 0.2s;
}
.peer-tile:hover {
  border-color: rgba(59,130,246,0.6);
  background: rgba(255,255,255,0.08);
  transform: translateY(-1px);
}
.peer-tile .name { font-weight: 600; font-size: 16px; margin-bottom: 6px; }
.status { font-size: 12px; }
.status.online { color: var(--success); }
.status.offline { color: var(--text-muted); }

/* TABLE (Users) */
table { width: 100%; border-collapse: collapse; font-size: 13px; }
th { text-align: left; color: var(--text-muted); font-weight: 500; padding: 8px; font-size: 11px; text-transform: uppercase; }
td { padding: 8px; border-top: 1px solid var(--border); }
tr:hover td { background: var(--surface-hover); }

/* BUTTONS / INPUTS */
button.primary {
  background: var(--accent);
  color: white;
  border: none;
  border-radius: 8px;
  padding: 8px 14px;
  cursor: pointer;
  font-size: 13px;
}
button.primary:hover { background: var(--accent-dark); }
button.ghost {
  background: none;
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 8px;
  padding: 6px 12px;
  cursor: pointer;
  font-size: 12px;
}
input, select {
  background: var(--surface-hover);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 8px;
  padding: 8px 10px;
  font-size: 13px;
}

.toolbar { display: flex; justify-content: space-between; align-items: center; margin-bottom: 16px; }
.section-title { font-size: 16px; font-weight: 600; margin-bottom: 12px; }

/* LOGIN */
.login-screen {
  height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
}
.login-box {
  background: rgba(23,26,33,0.55);
  backdrop-filter: blur(20px) saturate(150%);
  -webkit-backdrop-filter: blur(20px) saturate(150%);
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: var(--radius);
  padding: 32px;
  width: 320px;
  text-align: center;
  box-shadow: 0 12px 48px rgba(0,0,0,0.4);
}
.login-box h1 { font-size: 16px; margin-bottom: 20px; }
.login-box input { width: 100%; margin-bottom: 12px; }
.login-box button { width: 100%; }
.error-msg { color: var(--danger); font-size: 12px; margin-top: 8px; }

.modal-overlay {
  position: fixed; inset: 0; background: rgba(0,0,0,0.6);
  display: flex; align-items: center; justify-content: center; z-index: 100;
}
.modal {
  background: rgba(23,26,33,0.65);
  backdrop-filter: blur(24px) saturate(160%);
  -webkit-backdrop-filter: blur(24px) saturate(160%);
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: var(--radius); padding: 20px; width: 420px;
  box-shadow: 0 12px 48px rgba(0,0,0,0.4);
}
.modal h3 { margin-top: 0; font-size: 15px; }
.modal-actions { display: flex; flex-wrap: wrap; justify-content: center; gap: 8px; margin-top: 16px; }
.modal-actions button { flex: 0 0 auto; white-space: nowrap; }
.field { margin-bottom: 12px; }
.field label { display: block; font-size: 12px; color: var(--text-muted); margin-bottom: 4px; }
.field input, .field select { width: 100%; }