:root {
  --bg: #0b0d12;
  --card: #121726;
  --text: #e9eefc;
  --muted: #aab3c8;
  --line: #27304a;
  --btn: #3b82f6;
  --btn2: #1f2937;
  --bg-grad: radial-gradient(1200px 600px at 20% 0%, #111a35 0%, var(--bg) 60%);
  --card-bg: rgba(18, 23, 38, 0.85);
  --card-border: rgba(39, 48, 74, 0.7);
  --input-bg: rgba(0,0,0,0.25);
  --result-bg: rgba(0,0,0,0.2);
  --recent-border: rgba(39, 48, 74, 0.9);
  --code: #93c5fd;
}

[data-theme="light"] {
  --bg: #f5f6fa;
  --card: #ffffff;
  --text: #0f172a;
  --muted: #4b5563;
  --line: #e5e7eb;
  --btn: #2563eb;
  --btn2: #e5e7eb;
  --bg-grad: radial-gradient(1200px 600px at 20% 0%, #ffffff 0%, #eef1f7 60%);
  --card-bg: rgba(255, 255, 255, 0.9);
  --card-border: rgba(229, 231, 235, 0.9);
  --input-bg: rgba(15, 23, 42, 0.05);
  --result-bg: rgba(15, 23, 42, 0.04);
  --recent-border: rgba(229, 231, 235, 0.9);
  --code: #1d4ed8;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: ui-sans-serif, system-ui, -apple-system, "Apple SD Gothic Neo", "Noto Sans KR", Arial;
  background: var(--bg-grad);
  color: var(--text);
}

.wrap {
  max-width: 760px;
  margin: 48px auto;
  padding: 0 16px;
}

.topbar {
  display: flex;
  gap: 14px;
  align-items: flex-start;
  justify-content: space-between;
  flex-wrap: wrap;
}
h1 { margin: 0 0 8px; font-size: 40px; letter-spacing: -0.5px; }
.sub { margin: 0 0 18px; color: var(--muted); }
.cardTitle { margin: 0 0 6px; font-size: 20px; }

.nav {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 10px 0 18px;
}
.nav a {
  text-decoration: none;
  color: var(--text);
  border: 1px solid var(--line);
  padding: 6px 10px;
  border-radius: 999px;
  font-size: 13px;
  background: rgba(255,255,255,0.02);
}
.nav a:hover { border-color: var(--btn); color: var(--btn); }

.card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 18px;
  padding: 18px;
  box-shadow: 0 10px 30px rgba(0,0,0,0.35);
  backdrop-filter: blur(6px);
}

.row {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.btn {
  border: 0;
  border-radius: 12px;
  padding: 12px 16px;
  cursor: pointer;
  font-weight: 700;
  background: var(--btn);
  color: white;
}
.btn.sm { padding: 10px 14px; font-size: 13px; }
.btn.ghost {
  background: transparent;
  border: 1px solid var(--line);
  color: var(--text);
}
.btn:disabled { opacity: 0.5; cursor: not-allowed; }

.options { margin: 14px 0 10px; }
.chk { display: inline-flex; gap: 10px; align-items: center; color: var(--muted); }

.recentBox {
  border: 1px dashed var(--recent-border);
  border-radius: 14px;
  padding: 12px;
  margin: 10px 0 14px;
}
.hidden { display: none; }

textarea {
  width: 100%;
  border-radius: 12px;
  border: 1px solid var(--line);
  background: var(--input-bg);
  color: var(--text);
  padding: 10px;
  resize: vertical;
}
input[type="text"],
input[type="email"] {
  width: 100%;
  border-radius: 12px;
  border: 1px solid var(--line);
  background: var(--input-bg);
  color: var(--text);
  padding: 10px;
}

.hint { margin: 0 0 10px; color: var(--muted); line-height: 1.4; }
.hint.small { margin-top: 8px; font-size: 12px; }

.result {
  min-height: 120px;
  border-radius: 14px;
  border: 1px solid var(--line);
  background: var(--result-bg);
  padding: 14px;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
  white-space: pre-wrap;
  line-height: 1.7;
}
.result.empty { color: rgba(233, 238, 252, 0.55); }

.footer { margin-top: 12px; color: var(--muted); font-size: 13px; }
code { color: var(--code); }

[data-theme="light"] .result.empty { color: rgba(15, 23, 42, 0.5); }

.form { display: grid; gap: 12px; }
.field { display: grid; gap: 6px; color: var(--muted); font-size: 13px; }
.field span { color: var(--muted); }

.grid {
  display: grid;
  gap: 12px;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  margin: 10px 0 0;
}
.panel {
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 12px;
  background: rgba(0,0,0,0.15);
}
[data-theme="light"] .panel { background: rgba(15, 23, 42, 0.03); }
.panel h3 { margin: 0 0 6px; font-size: 15px; }
.panel p { margin: 0; color: var(--muted); }

.list {
  margin: 0 0 12px;
  padding-left: 18px;
  color: var(--muted);
}
.list li { margin: 6px 0; }

.faq details {
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 10px 12px;
  margin-bottom: 10px;
  background: rgba(0,0,0,0.12);
}
[data-theme="light"] .faq details { background: rgba(15, 23, 42, 0.03); }
.faq summary {
  cursor: pointer;
  font-weight: 600;
  color: var(--text);
}
.faq p { margin: 8px 0 0; color: var(--muted); }

.small { font-size: 12px; }
.link { color: var(--btn); text-decoration: none; }
.link:hover { text-decoration: underline; }
.footerLinks {
  display: inline-flex;
  gap: 6px;
  align-items: center;
  margin-left: 10px;
}
.dot { color: var(--muted); }