:root {
  --bg: #0f1420;
  --panel: #171d2c;
  --border: #2a3348;
  --text: #e6e9f0;
  --muted: #98a2b8;
  --accent: #4da3ff;
  --ok: #3ecf8e;
  --err: #ff6b6b;
  font-family: -apple-system, "Segoe UI", Pretendard, Roboto, sans-serif;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
}

header, footer {
  max-width: 960px;
  margin: 0 auto;
  padding: 24px 20px;
}

header h1 { margin: 0 0 8px; font-size: 1.5rem; }
header p { color: var(--muted); margin: 0; }

main {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 20px 60px;
}

section.category {
  margin-bottom: 28px;
}

section.category h2 {
  font-size: 1.05rem;
  border-bottom: 1px solid var(--border);
  padding-bottom: 6px;
  margin-bottom: 12px;
}

.query-card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 14px 16px;
  margin-bottom: 12px;
}

.query-card p.desc {
  margin: 0 0 10px;
  color: var(--text);
}

button.run {
  background: var(--accent);
  color: #06101f;
  border: none;
  border-radius: 6px;
  padding: 8px 14px;
  font-weight: 600;
  cursor: pointer;
}

button.run:hover { opacity: 0.9; }
button.run:disabled { opacity: 0.5; cursor: default; }

pre.sql {
  background: #0b0f18;
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 10px 12px;
  overflow-x: auto;
  font-size: 0.85rem;
  color: #9fd0ff;
  margin: 10px 0;
}

.result { margin-top: 10px; }

.result table {
  border-collapse: collapse;
  width: 100%;
  font-size: 0.85rem;
  overflow-x: auto;
  display: block;
}

.result th, .result td {
  border: 1px solid var(--border);
  padding: 6px 8px;
  text-align: left;
  white-space: nowrap;
}

.result th { background: #1f2740; }

.result .message { color: var(--ok); font-weight: 600; }
.result .error { color: var(--err); font-weight: 600; }

footer p { color: var(--muted); font-size: 0.8rem; text-align: center; }

.hidden { display: none !important; }

.user-bar {
  margin-top: 12px;
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.9rem;
  color: var(--muted);
}

.btn-link {
  background: none;
  border: none;
  color: var(--accent);
  cursor: pointer;
  font-size: 0.9rem;
  padding: 0;
  text-decoration: underline;
}

.auth-section {
  max-width: 400px;
  margin: 0 auto;
  padding: 0 20px 60px;
}

.auth-card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 20px;
}

.auth-tabs {
  display: flex;
  gap: 8px;
  margin-bottom: 16px;
}

.auth-tab {
  flex: 1;
  background: none;
  border: 1px solid var(--border);
  color: var(--muted);
  padding: 8px;
  border-radius: 6px;
  cursor: pointer;
  font-weight: 600;
}

.auth-tab.active {
  background: var(--accent);
  color: #06101f;
  border-color: var(--accent);
}

.auth-form label {
  display: block;
  margin-bottom: 12px;
  font-size: 0.85rem;
  color: var(--muted);
}

.auth-form input {
  display: block;
  width: 100%;
  margin-top: 6px;
  padding: 8px 10px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text);
  font-size: 0.95rem;
}

.auth-form button.run {
  width: 100%;
  padding: 10px;
  margin-top: 4px;
}

.auth-error {
  color: var(--err);
  font-size: 0.85rem;
  min-height: 1.2em;
  margin: 10px 0 0;
}

.auth-hint {
  color: var(--muted);
  font-size: 0.8rem;
  margin: 16px 0 0;
  text-align: center;
}

.auth-links {
  text-align: center;
  margin: 10px 0 0;
}

.auth-resend {
  text-align: center;
  margin: 4px 0 0;
}

.auth-message p#register-success-text {
  color: var(--text);
  margin: 0 0 14px;
  line-height: 1.5;
}

.auth-error.message {
  color: var(--ok);
}

@media (prefers-color-scheme: light) {
  :root {
    --bg: #f7f8fb;
    --panel: #ffffff;
    --border: #dde2ec;
    --text: #1b2130;
    --muted: #5b6478;
  }
  pre.sql { background: #f1f4fa; color: #1a5fa8; }
  .result th { background: #eef1f8; }
}