:root {
  --bg: #ffffff;
  --bg-deep: #f5f5f6;
  --ink: #3d3e3f;
  --muted: #6e6f70;
  --line: #e2e2e3;
  --panel: #ffffff;
  --accent: #692ecc;
  --accent-ink: #4d1fa0;
  --danger: #9b2c2c;
  --shadow: 0 12px 40px rgba(61, 62, 63, 0.08);
  --radius: 18px;
  --font: "Raleway", system-ui, sans-serif;
  --display: "Raleway", system-ui, sans-serif;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: var(--font);
  color: var(--ink);
  background:
    radial-gradient(circle at top left, rgba(105, 46, 204, 0.08), transparent 42%),
    linear-gradient(180deg, var(--bg), var(--bg-deep));
  min-height: 100vh;
}

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

.top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1.5rem;
  padding: 1.1rem 1.5rem;
  border-bottom: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(8px);
  position: sticky;
  top: 0;
  z-index: 10;
}

.brand { display: flex; gap: 0.85rem; align-items: center; }
.brand-mark {
  width: 42px; height: 42px; border-radius: 12px;
  display: grid; place-items: center;
  background: var(--accent); color: #ffffff;
  font-weight: 700; letter-spacing: 0.04em;
}
.brand strong { display: block; font-family: var(--display); font-size: 1.05rem; }
.brand small { color: var(--muted); }

nav { display: flex; flex-wrap: wrap; gap: 0.85rem; align-items: center; }
nav a, .linkish {
  color: var(--ink); font-weight: 600; font-size: 0.95rem;
}
nav a.active { color: var(--accent); }

.wrap {
  width: min(1040px, calc(100% - 2rem));
  margin: 2rem auto 3rem;
}

h1 {
  font-family: var(--display);
  font-size: clamp(1.8rem, 3vw, 2.4rem);
  margin: 0 0 0.4rem;
  letter-spacing: -0.02em;
}
h2 { font-family: var(--display); margin: 0 0 1rem; font-size: 1.35rem; }
h3 { margin: 1.2rem 0 0.5rem; }
.lead { color: var(--muted); margin: 0 0 1.5rem; max-width: 46rem; }

.panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.25rem 1.35rem;
  box-shadow: var(--shadow);
  margin-bottom: 1.25rem;
}
.panel-head {
  display: flex; justify-content: space-between; align-items: baseline; gap: 1rem;
  margin-bottom: 0.75rem;
}
.panel-head h2 { margin: 0; }

.stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 1rem;
  margin-bottom: 1.5rem;
}
.stat {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.2rem 1.3rem;
  box-shadow: var(--shadow);
}
.stat-value {
  display: block;
  font-family: var(--display);
  font-size: 2.2rem;
  color: var(--accent-ink);
  line-height: 1;
}
.stat-label { color: var(--muted); font-size: 0.92rem; }

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.95rem;
}
th, td {
  text-align: left;
  padding: 0.75rem 0.5rem;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}
th { color: var(--muted); font-weight: 600; font-size: 0.85rem; }

.grid-form, .stack {
  display: grid;
  gap: 0.85rem;
}
.grid-form {
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  align-items: end;
}
label {
  display: grid;
  gap: 0.35rem;
  font-size: 0.9rem;
  color: var(--muted);
  font-weight: 600;
}
input {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 0.7rem 0.85rem;
  font: inherit;
  color: var(--ink);
  background: #fff;
}
button {
  border: 0;
  border-radius: 999px;
  padding: 0.75rem 1.2rem;
  background: var(--accent);
  color: #ffffff;
  font: inherit;
  font-weight: 700;
  cursor: pointer;
}
button:hover { filter: brightness(1.05); }
button.danger {
  background: transparent;
  color: var(--danger);
  border: 1px solid color-mix(in srgb, var(--danger) 35%, white);
  padding: 0.4rem 0.8rem;
  font-size: 0.85rem;
}
button.linkish {
  background: transparent;
  color: var(--ink);
  padding: 0;
  font-weight: 600;
}
.inline { display: inline; margin: 0; }

.plain-list { margin: 0; padding-left: 1.2rem; }
.plain-list li { margin: 0.55rem 0; }
.count {
  display: inline-block;
  min-width: 1.6rem;
  padding: 0.1rem 0.45rem;
  border-radius: 999px;
  background: color-mix(in srgb, var(--accent) 12%, white);
  color: var(--accent-ink);
  font-weight: 700;
  font-size: 0.85rem;
  margin-right: 0.35rem;
}

.muted { color: var(--muted); }
.error {
  color: var(--danger);
  background: color-mix(in srgb, var(--danger) 8%, white);
  border: 1px solid color-mix(in srgb, var(--danger) 25%, white);
  padding: 0.75rem 1rem;
  border-radius: 12px;
}
.notice {
  color: var(--accent-ink);
  background: color-mix(in srgb, var(--accent) 10%, white);
  border: 1px solid color-mix(in srgb, var(--accent) 25%, white);
  padding: 0.75rem 1rem;
  border-radius: 12px;
}
.field-hint { margin: 0.75rem 0 0; font-size: 0.9rem; }
.row-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  align-items: center;
  justify-content: flex-end;
}
.row-actions button {
  padding: 0.4rem 0.85rem;
  font-size: 0.85rem;
}
.hint {
  background: color-mix(in srgb, var(--accent) 8%, white);
  border: 1px solid color-mix(in srgb, var(--accent) 22%, white);
  border-radius: 14px;
  padding: 1rem 1.15rem;
  margin: 0 0 1.25rem;
  max-width: 46rem;
}
.hint-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  margin-bottom: 0.45rem;
}
.hint-head strong { margin: 0; color: var(--accent-ink); }
button.ghost {
  background: #ffffff;
  color: var(--accent);
  border: 1px solid color-mix(in srgb, var(--accent) 35%, white);
  padding: 0.4rem 0.9rem;
  font-size: 0.85rem;
  white-space: nowrap;
}
button.ghost:hover { background: color-mix(in srgb, var(--accent) 8%, white); }
.hint-intro { margin: 0 0 0.65rem; color: var(--muted); font-size: 0.92rem; }
.hint-copy {
  margin: 0;
  padding: 0.85rem 1rem;
  border-left: 3px solid var(--accent);
  background: #fff;
  border-radius: 0 12px 12px 0;
  color: var(--ink);
  line-height: 1.45;
}
.hint-copy p { margin: 0 0 0.65rem; }
.hint-copy ol {
  margin: 0;
  padding-left: 1.25rem;
}
.hint-copy li { margin: 0.35rem 0; }
code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.9em;
}

.login {
  width: min(420px, 100%);
  margin: 12vh auto 0;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 2rem;
  box-shadow: var(--shadow);
}

.question-box, .answer-box {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 1rem;
  white-space: pre-wrap;
  word-break: break-word;
}
.answer-box { font-family: inherit; margin: 0; }

.thread { display: grid; gap: 0.85rem; }
.bubble {
  border-radius: 16px;
  padding: 0.9rem 1rem;
  border: 1px solid var(--line);
  background: #fff;
}
.bubble.user {
  border-left: 4px solid var(--accent);
}
.bubble.bot {
  border-left: 4px solid var(--ink);
  background: #f5f5f6;
}
.bubble header {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 0.4rem;
  color: var(--muted);
  font-size: 0.85rem;
}
.bubble-body { white-space: pre-wrap; word-break: break-word; }

@media (max-width: 720px) {
  .top { flex-direction: column; align-items: flex-start; }
  table { display: block; overflow-x: auto; }
}