:root {
  --ins-bg:       #fafafa;
  --ins-surface:  #ffffff;
  --ins-border:   #e5e7eb;
  --ins-text:     #18181b;
  --ins-muted:    #6b7280;
  --ins-accent:   #3b82f6;
  --ins-accent-2: #2563eb;
  --ins-good:     #16a34a;
  --ins-good-bg:  #f0fdf4;
  --ins-bad:      #dc2626;
  --ins-bad-bg:   #fef2f2;
  --ins-code-bg:  #18181b;
  --ins-code-fg:  #e5e7eb;
}

@media (prefers-color-scheme: dark) {
  :root {
    --ins-bg:       #09090b;
    --ins-surface:  #18181b;
    --ins-border:   #27272a;
    --ins-text:     #fafafa;
    --ins-muted:    #a1a1aa;
    --ins-accent:   #60a5fa;
    --ins-accent-2: #3b82f6;
    --ins-good:     #4ade80;
    --ins-good-bg:  #052e16;
    --ins-bad:      #f87171;
    --ins-bad-bg:   #2c0b0b;
    --ins-code-bg:  #09090b;
    --ins-code-fg:  #d4d4d8;
  }
}

* { box-sizing: border-box; }

body.ins {
  margin: 0;
  min-height: 100vh;
  background: var(--ins-bg);
  color: var(--ins-text);
  font-family: "Noto Sans KR", system-ui, -apple-system, "Apple SD Gothic Neo", sans-serif;
  line-height: 1.6;
  display: flex;
  justify-content: center;
  padding: 4rem 1.25rem;
}

.ins-wrap { width: 100%; max-width: 640px; }

.ins-brand {
  display: flex; align-items: center; gap: .6rem;
  margin-bottom: 1.5rem; color: var(--ins-text);
}
.ins-brand .ic {
  width: 34px; height: 34px; border-radius: 9px;
  background: var(--ins-accent); color: #fff;
  display: grid; place-items: center; flex: none;
}
.ins-brand strong { font-size: 1.2rem; font-weight: 800; letter-spacing: -.01em; }
.ins-brand small { display: block; color: var(--ins-muted); font-size: .8rem; }

.ins-card {
  background: var(--ins-surface);
  border: 1px solid var(--ins-border);
  border-radius: 14px;
  padding: 1.75rem;
  margin-bottom: 1.25rem;
  box-shadow: 0 1px 2px rgba(0,0,0,.04);
}

.ins-card h2 {
  margin: 0 0 .25rem;
  font-size: 1.05rem;
  font-weight: 700;
}
.ins-card .sub { margin: 0 0 1.1rem; color: var(--ins-muted); font-size: .85rem; }

.ins-check-list { list-style: none; margin: 0; padding: 0; }
.ins-check-list li {
  display: flex; align-items: center; gap: .6rem;
  padding: .55rem 0;
  border-top: 1px solid var(--ins-border);
  font-size: .88rem;
}
.ins-check-list li:first-child { border-top: none; }
.ins-check-list .dot {
  width: 20px; height: 20px; border-radius: 999px;
  flex: none; display: grid; place-items: center;
  font-size: .7rem; font-weight: 800;
}
.ins-check-list .dot.ok  { background: var(--ins-good-bg); color: var(--ins-good); }
.ins-check-list .dot.bad { background: var(--ins-bad-bg);  color: var(--ins-bad); }
.ins-check-list .label { flex: 1; }
.ins-check-list .detail { color: var(--ins-muted); font-size: .8rem; }

.ins-alert {
  border-radius: 10px; padding: .7rem .9rem; font-size: .85rem;
  margin-bottom: 1rem;
}
.ins-alert.bad  { background: var(--ins-bad-bg);  color: var(--ins-bad); }
.ins-alert.good { background: var(--ins-good-bg); color: var(--ins-good); }

.ins-field { margin-bottom: 1rem; }
.ins-field label {
  display: block; font-size: .82rem; font-weight: 600;
  margin-bottom: .35rem; color: var(--ins-text);
}
.ins-field .hint { font-size: .76rem; color: var(--ins-muted); margin-top: .3rem; }
.ins-field input[type="text"],
.ins-field input[type="email"],
.ins-field input[type="password"] {
  width: 100%; padding: .6rem .75rem;
  border: 1px solid var(--ins-border); border-radius: 8px;
  background: var(--ins-bg); color: var(--ins-text);
  font-size: .9rem; font-family: inherit;
}
.ins-field input:focus {
  outline: 2px solid var(--ins-accent); outline-offset: 1px;
}
.ins-row2 { display: grid; grid-template-columns: 1fr 1fr; gap: .8rem; }
@media (max-width: 480px) { .ins-row2 { grid-template-columns: 1fr; } }

.ins-btn {
  display: inline-flex; align-items: center; justify-content: center; gap: .4rem;
  width: 100%; padding: .75rem 1rem;
  border: none; border-radius: 9px;
  background: var(--ins-accent); color: #fff;
  font-size: .92rem; font-weight: 700; cursor: pointer;
  font-family: inherit;
}
.ins-btn:hover { background: var(--ins-accent-2); }
.ins-btn:disabled { opacity: .5; cursor: not-allowed; }
.ins-btn.ghost {
  background: transparent; color: var(--ins-text);
  border: 1px solid var(--ins-border);
}
.ins-btn.ghost:hover { background: var(--ins-bg); }
.ins-actions { display: flex; gap: .6rem; margin-top: 1.25rem; }
.ins-actions .ins-btn { width: auto; flex: 1; }

.ins-steps { list-style: none; margin: 0; padding: 0; }
.ins-steps li {
  border-top: 1px solid var(--ins-border);
  padding: .6rem 0;
}
.ins-steps li:first-child { border-top: none; }
.ins-steps summary {
  cursor: pointer; display: flex; align-items: center; gap: .5rem;
  font-size: .86rem; font-weight: 600; list-style: none;
}
.ins-steps summary::-webkit-details-marker { display: none; }
.ins-steps .dot {
  width: 18px; height: 18px; border-radius: 999px; flex: none;
  display: grid; place-items: center; font-size: .65rem; font-weight: 800;
}
.ins-steps .dot.ok  { background: var(--ins-good-bg); color: var(--ins-good); }
.ins-steps .dot.bad { background: var(--ins-bad-bg);  color: var(--ins-bad); }
.ins-steps pre {
  margin: .5rem 0 0 1.6rem; padding: .75rem .9rem;
  background: var(--ins-code-bg); color: var(--ins-code-fg);
  border-radius: 8px; font-size: .78rem; overflow: auto;
  white-space: pre-wrap; word-break: break-word;
}

.ins-done {
  text-align: center; padding: .5rem 0 1rem;
}
.ins-done .ic-big {
  width: 56px; height: 56px; border-radius: 999px; margin: 0 auto .9rem;
  display: grid; place-items: center; font-size: 1.6rem;
}
.ins-done.ok .ic-big  { background: var(--ins-good-bg); color: var(--ins-good); }
.ins-done.bad .ic-big { background: var(--ins-bad-bg);  color: var(--ins-bad); }
.ins-done h1 { margin: 0 0 .35rem; font-size: 1.25rem; }
.ins-done p { margin: 0; color: var(--ins-muted); font-size: .88rem; }

.ins-kv { margin: 1.1rem 0; border: 1px solid var(--ins-border); border-radius: 10px; overflow: hidden; }
.ins-kv div { display: flex; padding: .6rem .9rem; font-size: .86rem; }
.ins-kv div + div { border-top: 1px solid var(--ins-border); }
.ins-kv .k { width: 8rem; color: var(--ins-muted); flex: none; }
.ins-kv .v { font-weight: 600; word-break: break-all; }

.ins-footer { text-align: center; color: var(--ins-muted); font-size: .78rem; margin-top: 1.5rem; }