:root {
  color-scheme: light;
  --bg: #f2efe9;
  --ink: #0f1722;
  --muted: #4f5a6a;
  --card: #ffffff;
  --line: #d3d8e2;
  --brand: #0f766e;
  --brand-soft: #d8f2ef;
  --warn: #b45309;
  --warn-soft: #fff7ed;
  --ok: #166534;
  --ok-soft: #dcfce7;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  min-height: 100%;
  font-family: "Avenir Next", "Trebuchet MS", "Segoe UI", sans-serif;
  color: var(--ink);
  background:
    radial-gradient(circle at 15% 0%, #dff6f2 0%, transparent 33%),
    radial-gradient(circle at 85% 20%, #f6e8d3 0%, transparent 36%),
    var(--bg);
}

a {
  color: var(--brand);
  text-decoration-color: color-mix(in oklab, var(--brand), transparent 55%);
}

a:hover {
  text-decoration-thickness: 2px;
}

.wrap {
  max-width: 980px;
  margin: 0 auto;
  padding: 28px 16px 52px;
}

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 22px;
  box-shadow: 0 10px 28px rgba(15, 23, 34, 0.06);
  margin-top: 16px;
}

.card.hero {
  background:
    linear-gradient(115deg, #ffffff 5%, #f3fbfa 60%, #fdf8ef 100%);
}

h1 {
  font-size: clamp(1.6rem, 3.2vw, 2.4rem);
  line-height: 1.2;
  margin: 0 0 10px;
}

h2 {
  font-size: clamp(1.2rem, 2.2vw, 1.55rem);
  margin: 24px 0 10px;
}

h3 {
  font-size: 1rem;
  margin: 20px 0 8px;
}

p,
li {
  line-height: 1.6;
}

.muted {
  color: var(--muted);
}

nav {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 0 0 14px;
}

.badge-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 10px 0 14px;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  border-radius: 999px;
  padding: 6px 12px;
  font-size: 0.82rem;
  font-weight: 600;
  border: 1px solid var(--line);
  background: #fff;
}

.badge.ok {
  border-color: #b7e4c7;
  background: var(--ok-soft);
  color: var(--ok);
}

.badge.warn {
  border-color: #fed7aa;
  background: var(--warn-soft);
  color: var(--warn);
}

.notice {
  border: 1px solid #fed7aa;
  background: var(--warn-soft);
  color: #7c2d12;
  border-radius: 12px;
  padding: 12px 14px;
}

.highlight {
  border: 1px solid #bde8e3;
  background: var(--brand-soft);
  border-radius: 12px;
  padding: 12px 14px;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 14px;
}

.button-link {
  display: inline-block;
  text-decoration: none;
  border-radius: 10px;
  padding: 10px 14px;
  border: 1px solid #9cd7cf;
  background: #ecf9f7;
  color: #0b5c56;
  font-weight: 600;
}

.button-link.secondary {
  border-color: var(--line);
  background: #fff;
  color: var(--ink);
}

.split {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}

.todo-group {
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 14px;
  background: #fff;
}

.todo-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  margin: 8px 0;
}

.todo-item input[type="checkbox"] {
  margin-top: 4px;
  width: 18px;
  height: 18px;
  accent-color: var(--brand);
}

.todo-meta {
  color: var(--muted);
  font-size: 0.9rem;
}

.progress {
  margin: 10px 0 16px;
  width: 100%;
  height: 10px;
  border-radius: 999px;
  background: #e8edf3;
  overflow: hidden;
}

.progress-bar {
  height: 100%;
  width: 0;
  background: linear-gradient(90deg, #14b8a6 0%, #0f766e 100%);
  transition: width 0.22s ease;
}

hr {
  border: 0;
  border-top: 1px solid var(--line);
  margin: 20px 0;
}

@media (min-width: 860px) {
  .split {
    grid-template-columns: 1fr 1fr;
  }
}

.tool-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}

.tool-card {
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #fff;
  padding: 12px;
}

.tool-card h3 {
  margin-top: 4px;
}

.copy-box {
  width: 100%;
  min-height: 74px;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 10px;
  font: 0.9rem/1.4 "SFMono-Regular", Menlo, Monaco, Consolas, "Liberation Mono", monospace;
  background: #f8fafc;
  color: #0f1722;
  resize: vertical;
}

.copy-actions {
  margin-top: 8px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.copy-btn {
  border: 1px solid #8bd0c7;
  background: #e8fbf8;
  color: #0b5c56;
  border-radius: 10px;
  padding: 8px 12px;
  font-weight: 600;
  cursor: pointer;
}

.copy-btn.secondary {
  border-color: var(--line);
  background: #fff;
  color: var(--ink);
}

.copy-state {
  font-size: 0.84rem;
  color: var(--muted);
}

.seq-list {
  margin: 0;
  padding-left: 20px;
}

.seq-list li {
  margin: 6px 0;
}

@media (min-width: 860px) {
  .tool-grid {
    grid-template-columns: 1fr 1fr;
  }
}