:root {
  --bg: #eef1f8;
  --card: #ffffff;
  --ink: #12141c;
  --ink-soft: #6b7280;
  --line: #e2e5ea;

  /* informational blue — icons, step numbers, links */
  --blue: #1258ff;
  --blue-soft: #eaf0ff;

  /* navy — headers, question nodes, structure */
  --navy: #0a1a4a;
  --q-bg: #e8ecf7;
  --q-border: #c3cbe4;

  /* accent — reserved for the two install/signup CTAs only */
  --accent: #0060ff;
  --accent-dark: #0026a3;
  --accent-soft: #e4ecff;

  --radius: 14px;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: 'Pretendard', -apple-system, BlinkMacSystemFont, 'Malgun Gothic', sans-serif;
  -webkit-font-smoothing: antialiased;
}

.page {
  max-width: 480px;
  margin: 0 auto;
  padding: 0 20px 56px;
}

/* HERO */
.hero {
  text-align: center;
  padding: 40px 10px 6px;
}

.dday-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 18px;
  background: var(--navy);
  border-radius: 999px;
}
.dday-icon {
  width: 16px;
  height: 16px;
  color: #fff;
  flex-shrink: 0;
}
.dday {
  font-size: 19px;
  font-weight: 800;
  color: #fff;
  letter-spacing: -0.01em;
}
.dday-sub {
  font-size: 12.5px;
  font-weight: 600;
  color: rgba(255, 255, 255, 0.7);
}

/* CHART */
.chart {
  display: flex;
  flex-direction: column;
  align-items: stretch;
  padding-top: 14px;
}

.node {
  border: 1.5px solid var(--line);
  background: var(--card);
  border-radius: var(--radius);
  text-align: left;
  box-shadow: 0 1px 2px rgba(16, 20, 30, 0.04);
}

.start {
  padding: 14px 16px;
  border-color: var(--line);
}
.start-title {
  font-size: 15px;
  font-weight: 700;
  color: var(--ink);
  margin: 0 0 4px;
}
.start-note {
  display: inline-block;
  font-size: 15px;
  font-weight: 800;
  color: var(--blue);
  background: var(--blue-soft);
  padding: 5px 10px;
  border-radius: 8px;
  margin: 0;
}

.final {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  padding: 22px 20px;
  border: 1.5px solid var(--navy);
}
.final .num-badge { margin-bottom: 10px; }
.final-label {
  font-size: 15.5px;
  font-weight: 700;
  color: var(--navy);
  margin: 0 0 8px;
}
.final-note {
  font-size: 13px;
  color: var(--ink-soft);
  line-height: 1.6;
  margin: 0;
}

/* NUMBER BADGE (shown on every step so YES/NO can point at a number
   instead of a drawn connector line) */
.num-badge {
  flex-shrink: 0;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: var(--blue);
  color: #fff;
  font-size: 13px;
  font-weight: 800;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}
.num-badge-neutral {
  background: var(--line);
  color: var(--ink-soft);
}

/* QUESTION (decision point — visually separated from the clickable
   benefit boxes: tinted navy card, dashed edge, "Q" badge, no chevron) */
.question {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 14px 16px;
  text-align: left;
  background: var(--q-bg);
  border: 1.5px dashed var(--q-border);
  box-shadow: none;
}
.q-row {
  display: flex;
  align-items: center;
  gap: 10px;
}
.q-badge {
  flex-shrink: 0;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: var(--navy);
  color: #fff;
  font-size: 12.5px;
  font-weight: 800;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}
.q-text {
  font-size: 16px;
  font-weight: 700;
  color: var(--navy);
}
.q-jump {
  display: flex;
  gap: 8px;
  padding-left: 36px;
}
.jump {
  font-size: 13px;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: 8px;
}
.jump-yes { background: var(--navy); color: #fff; }
.jump-no { background: #fff; color: var(--ink-soft); border: 1px solid var(--q-border); }

/* ARROWS */
.arrow {
  align-self: center;
  width: 2px;
  height: 26px;
  background: var(--line);
  margin: 0 auto;
  position: relative;
}
.arrow::after {
  content: '';
  position: absolute;
  bottom: -1px;
  left: 50%;
  transform: translateX(-50%);
  border-left: 5px solid transparent;
  border-right: 5px solid transparent;
  border-top: 7px solid var(--ink-soft);
}
.arrow.small { height: 14px; }

/* BOX (clickable benefit — reward/coupon/point steps) */
.box {
  display: flex;
  align-items: center;
  justify-content: flex-start;
  gap: 10px;
  padding: 14px 16px;
  font-size: 15px;
  font-weight: 600;
  color: var(--ink);
  text-decoration: none;
  transition: box-shadow .15s ease, transform .15s ease;
}
.box:active { transform: scale(0.98); }

.box::after {
  content: '›';
  margin-left: auto;
  padding-left: 8px;
  font-size: 22px;
  font-weight: 700;
  line-height: 1;
  color: var(--ink-soft);
  flex-shrink: 0;
}

.box.link-missing {
  border-style: dashed;
  border-color: var(--ink-soft);
  opacity: 0.7;
}

/* HIGHLIGHT — the two install/signup steps (2, 4) that should be the
   single most-clickable thing on the page: a vivid, saturated blue no
   other element on the page is filled with (icons/badges elsewhere are
   only small blue accents on white), stronger elevation, and a subtle
   attention pulse. */
.box-highlight {
  position: relative;
  background: linear-gradient(135deg, var(--accent), var(--accent-dark));
  border: 2px solid var(--accent-dark);
  color: #fff;
  font-weight: 800;
  font-size: 15.5px;
  padding: 17px 18px;
  box-shadow: 0 8px 20px rgba(0, 96, 255, 0.35), 0 2px 6px rgba(0, 38, 163, 0.25);
  animation: cta-pulse 2.4s ease-in-out infinite;
}
.box-highlight .num-badge { background: #fff; color: var(--accent-dark); }
.box-highlight::after { color: rgba(255, 255, 255, 0.9); font-weight: 800; }

@keyframes cta-pulse {
  0%, 100% {
    box-shadow: 0 8px 20px rgba(0, 96, 255, 0.35), 0 0 0 0 rgba(0, 96, 255, 0.4);
  }
  50% {
    box-shadow: 0 8px 20px rgba(0, 96, 255, 0.35), 0 0 0 8px rgba(0, 96, 255, 0);
  }
}
@media (prefers-reduced-motion: reduce) {
  .box-highlight { animation: none; }
}

/* GROUP BOX (contains several stacked boxes) */
.group {
  padding: 16px 14px 14px;
  display: flex;
  flex-direction: column;
}
.group-label {
  font-size: 13.5px;
  font-weight: 700;
  color: var(--ink-soft);
  margin: 0 0 10px;
}

/* FOOTER */
.footer {
  text-align: center;
  padding: 30px 10px 0;
  font-size: 12px;
  color: var(--ink-soft);
}