:root {
  color-scheme: light;
  --bg: #f4f7fb;
  --surface: #ffffff;
  --ink: #172033;
  --muted: #5d687a;
  --line: #d9e0ea;
  --brand: #155eef;
  --brand-dark: #0f3fa6;
  --warn-bg: #fff7e8;
  --warn-ink: #8a4b04;
  --shadow: 0 14px 35px rgba(23, 32, 51, 0.08);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-width: 320px;
  background: var(--bg);
  color: var(--ink);
  font-family: Arial, Helvetica, sans-serif;
  font-size: 16px;
  line-height: 1.45;
}

.app-shell {
  width: min(100%, 820px);
  margin: 0 auto;
  padding: 16px;
}

.hero,
.panel {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 12px;
  box-shadow: var(--shadow);
}

.hero {
  padding: 20px;
  margin-bottom: 14px;
}

.brand-row {
  display: flex;
  gap: 12px;
  align-items: center;
}

.brand-mark {
  display: inline-grid;
  width: 46px;
  height: 46px;
  place-items: center;
  border-radius: 12px;
  background: var(--brand);
  color: #fff;
  font-weight: 800;
}

.eyebrow {
  margin: 0 0 4px;
  color: var(--brand-dark);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

h1,
h2,
p,
li,
a {
  overflow-wrap: anywhere;
}

h1 {
  margin: 0;
  font-size: 1.55rem;
}

h2 {
  margin: 0;
  font-size: 1.2rem;
}

.hero-copy {
  margin: 14px 0 0;
  color: var(--muted);
}

.quick-answers,
.link-grid,
.checklist {
  display: grid;
  gap: 8px;
  margin-top: 16px;
}

.quick-answers span {
  display: inline-flex;
  width: fit-content;
  border-radius: 999px;
  padding: 7px 10px;
  background: #eaf1ff;
  color: var(--brand-dark);
  font-weight: 700;
  font-size: 0.88rem;
}

.panel {
  padding: 16px;
  margin-bottom: 14px;
}

.warning-panel {
  background: var(--warn-bg);
  border-color: #f0ca8b;
}

.warning-panel .eyebrow,
.warning-panel h2 {
  color: var(--warn-ink);
}

.section-heading {
  margin-bottom: 12px;
}

.app-link,
.summary-row,
.checklist label {
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 12px;
  background: #fbfcff;
}

.app-link {
  color: var(--brand-dark);
  font-weight: 800;
  text-decoration: none;
}

.sequence-list,
.plain-list {
  margin: 0;
  padding-left: 22px;
}

.sequence-list li,
.plain-list li {
  margin-bottom: 8px;
}

.summary-row,
.checklist label {
  color: var(--muted);
}

.checklist label.completed {
  border-color: var(--brand);
  color: var(--ink);
  background: #f0f5ff;
}

button {
  min-height: 48px;
  width: 100%;
  border: 0;
  border-radius: 10px;
  padding: 12px 14px;
  font: inherit;
  font-weight: 800;
  cursor: pointer;
}

.secondary-button {
  margin-top: 12px;
  background: #e8edf5;
  color: var(--ink);
}

@media (min-width: 700px) {
  .app-shell {
    padding: 24px;
  }

  .quick-answers,
  .link-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .link-grid .app-link:last-child {
    grid-column: span 3;
  }
}