:root {
  --bg-dark: #0d1117;
  --bg-primary: #161b22;
  --bg-lighter: #1f2630;
  --border: #2d333b;
  --text-primary: #e6edf3;
  --text-secondary: #9da7b3;
  --text-muted: #6e7681;
  --accent-blue: #4facfe;
  --accent-orange: #ff8c00;
  --accent-red: #f85149;
  --accent-green: #3fb950;
  --shadow: 0 8px 30px rgba(0, 0, 0, 0.35);
}

* { margin: 0; padding: 0; box-sizing: border-box; }

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg-dark);
  color: var(--text-primary);
  min-height: 100vh;
  line-height: 1.5;
}

a { color: var(--accent-blue); text-decoration: none; }

/* ---------- NAV ---------- */
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 28px;
  border-bottom: 1px solid var(--border);
  background: rgba(13, 17, 23, 0.9);
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: blur(8px);
}
.brand { display: flex; align-items: center; gap: 10px; font-weight: 800; font-size: 18px; }
.brand-icon {
  width: 36px; height: 36px; border-radius: 10px;
  background: linear-gradient(135deg, var(--accent-blue), var(--accent-orange));
  display: flex; align-items: center; justify-content: center; font-size: 18px;
}
.topbar nav { display: flex; gap: 8px; align-items: center; }

/* ---------- BUTTONS ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 10px 18px; border-radius: 8px; border: 1px solid var(--border);
  background: var(--bg-lighter); color: var(--text-primary);
  font-size: 14px; font-weight: 600; cursor: pointer; transition: all 0.15s;
}
.btn:hover { filter: brightness(1.15); }
.btn-primary { background: linear-gradient(135deg, var(--accent-blue), var(--accent-orange)); border: none; color: #fff; }
.btn-secondary { background: transparent; }
.btn-danger { background: rgba(248, 81, 73, 0.15); border-color: var(--accent-red); color: var(--accent-red); }
.btn-success { background: rgba(63, 185, 80, 0.15); border-color: var(--accent-green); color: var(--accent-green); }
.btn-sm { padding: 6px 12px; font-size: 13px; }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }

/* ---------- FORMS ---------- */
.form-group { margin-bottom: 16px; }
.form-label { display: block; font-size: 13px; font-weight: 600; margin-bottom: 6px; color: var(--text-secondary); }
.form-input {
  width: 100%; padding: 11px 14px; border-radius: 8px;
  border: 1px solid var(--border); background: var(--bg-primary);
  color: var(--text-primary); font-size: 14px; outline: none;
}
.form-input:focus { border-color: var(--accent-blue); }
.form-select {
  width: 100%; padding: 11px 14px; border-radius: 8px;
  border: 1px solid var(--border); background: var(--bg-primary); color: var(--text-primary); font-size: 14px;
}

/* ---------- CARDS ---------- */
.card {
  background: var(--bg-primary); border: 1px solid var(--border);
  border-radius: 14px; padding: 24px; box-shadow: var(--shadow);
}

/* ---------- HERO ---------- */
.hero {
  text-align: center; padding: 64px 24px 48px;
  background: radial-gradient(circle at 50% 0%, rgba(79, 172, 254, 0.12), transparent 60%);
}
.hero h1 { font-size: 42px; font-weight: 900; letter-spacing: -0.5px; max-width: 800px; margin: 0 auto; }
.hero h1 span { background: linear-gradient(90deg, var(--accent-blue), var(--accent-orange)); -webkit-background-clip: text; background-clip: text; color: transparent; }
.hero p { color: var(--text-secondary); max-width: 640px; margin: 16px auto 28px; font-size: 17px; }

.features {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 16px; max-width: 1080px; margin: 0 auto; padding: 0 24px 48px;
}
.feature {
  background: var(--bg-primary); border: 1px solid var(--border);
  border-radius: 14px; padding: 22px;
}
.feature .ico { font-size: 26px; margin-bottom: 10px; }
.feature h3 { font-size: 16px; margin-bottom: 8px; }
.feature p { color: var(--text-secondary); font-size: 14px; }

/* ---------- AUTH ---------- */
.auth-wrap {
  max-width: 460px; margin: 0 auto; padding: 24px 24px 64px;
}
.auth-tabs { display: flex; gap: 8px; margin-bottom: 20px; }
.auth-tabs button {
  flex: 1; padding: 11px; border-radius: 8px; border: 1px solid var(--border);
  background: var(--bg-primary); color: var(--text-secondary); font-size: 14px; font-weight: 700; cursor: pointer;
}
.auth-tabs button.active { background: var(--bg-lighter); color: var(--text-primary); border-color: var(--accent-blue); }
.alert {
  padding: 12px 14px; border-radius: 8px; font-size: 14px; margin-bottom: 14px;
}
.alert-error { background: rgba(248, 81, 73, 0.12); border: 1px solid var(--accent-red); color: var(--accent-red); }
.alert-success { background: rgba(63, 185, 80, 0.12); border: 1px solid var(--accent-green); color: var(--accent-green); }
.alert-info { background: rgba(79, 172, 254, 0.1); border: 1px solid var(--accent-blue); color: var(--accent-blue); }

/* ---------- PENDING / STATUS ---------- */
.status-card { max-width: 560px; margin: 48px auto; text-align: center; }
.status-card .big-ico { font-size: 56px; margin-bottom: 16px; }
.status-card h2 { margin-bottom: 12px; }
.status-card p { color: var(--text-secondary); margin-bottom: 8px; }
.status-chip {
  display: inline-block; padding: 6px 14px; border-radius: 999px;
  font-size: 13px; font-weight: 700; margin-bottom: 16px;
}
.status-chip.pending { background: rgba(255, 140, 0, 0.15); color: var(--accent-orange); border: 1px solid var(--accent-orange); }
.status-chip.suspended { background: rgba(248, 81, 73, 0.15); color: var(--accent-red); border: 1px solid var(--accent-red); }
.status-chip.active { background: rgba(63, 185, 80, 0.15); color: var(--accent-green); border: 1px solid var(--accent-green); }

/* ---------- ADMIN ---------- */
.admin-layout { max-width: 1200px; margin: 0 auto; padding: 24px; }
.admin-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 24px; flex-wrap: wrap; gap: 12px; }
.stats-row { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 14px; margin-bottom: 24px; }
.stat-box { background: var(--bg-primary); border: 1px solid var(--border); border-radius: 12px; padding: 16px; text-align: center; }
.stat-box .num { font-size: 28px; font-weight: 800; }
.stat-box .lbl { font-size: 13px; color: var(--text-secondary); }

.table { width: 100%; border-collapse: collapse; }
.table th, .table td { text-align: left; padding: 12px 14px; border-bottom: 1px solid var(--border); font-size: 14px; }
.table th { color: var(--text-secondary); font-weight: 600; font-size: 13px; text-transform: uppercase; letter-spacing: 0.4px; }
.table tr:hover td { background: rgba(255, 255, 255, 0.02); }
.badge { padding: 4px 10px; border-radius: 999px; font-size: 12px; font-weight: 700; }
.badge.pending { background: rgba(255, 140, 0, 0.15); color: var(--accent-orange); }
.badge.active { background: rgba(63, 185, 80, 0.15); color: var(--accent-green); }
.badge.suspended { background: rgba(248, 81, 73, 0.15); color: var(--accent-red); }
.badge.rejected { background: rgba(110, 118, 129, 0.15); color: var(--text-muted); }
.badge.admin { background: rgba(79, 172, 254, 0.15); color: var(--accent-blue); }
.badge.connected { background: rgba(63, 185, 80, 0.15); color: var(--accent-green); }
.badge.offline { background: rgba(110, 118, 129, 0.15); color: var(--text-muted); }
.row-actions { display: flex; gap: 6px; flex-wrap: wrap; }

.footer { text-align: center; color: var(--text-muted); font-size: 13px; padding: 32px; border-top: 1px solid var(--border); }

@media (max-width: 720px) {
  .hero h1 { font-size: 30px; }
  .topbar { padding: 12px 16px; }
}