/* =========================================================
   Start page: name sign-in + welcome popup with roadmap preview
   ========================================================= */
.onboard {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 2rem 1rem;
}
.onboard-card { width: 100%; max-width: 440px; text-align: center; }

.hero-art { display: block; width: 100%; max-width: 300px; height: auto; margin: 0 auto 1.25rem; }
.hero-art .label { font-size: 10px; font-weight: 800; letter-spacing: .1em; fill: var(--muted); }

.tagline { color: var(--muted); margin-inline: auto; }

.chip-list {
  list-style: none;
  padding: 0;
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: .5rem;
}

.chip-list button.chip {
  cursor: pointer;
  transition: transform .1s, background-color .15s, border-color .15s;
}
.chip-list button.chip:hover {
  border-color: var(--blue);
  color: var(--blue-dark);
  transform: translateY(-2px);
}
.chip-list button.chip:active {
  transform: translateY(1px);
}

/* Name form */
.name-form .form-label { font-weight: 800; }
.name-form .form-control {
  border: 2px solid var(--line);
  border-radius: 14px;
  padding: .8rem 1rem;
  font-weight: 700;
}
.name-form .form-control:focus { border-color: var(--blue); box-shadow: 0 0 0 .2rem rgba(28, 176, 246, .25); }

/* Welcome popup */
.modal-content { border: 2px solid var(--line); border-radius: 20px; }
.welcome-points { padding-left: 1.2rem; }
.welcome-points li + li { margin-top: .35rem; }

/* Native modal fallback */
.modal.show {
  display: block;
  background-color: rgba(0, 0, 0, 0.45);
}
.modal-backdrop.show {
  opacity: 0.5;
}

/* Roadmap preview: interactive 5-lesson path preview */
.preview-box {
  max-height: 280px;
  overflow-y: auto;
  border: 2px solid var(--line);
  border-radius: 16px;
  padding: .75rem;
  background: var(--bg);
}
.path-preview .unit-banner { padding: .6rem 1rem; }
.path-preview .unit-banner h2 { font-size: 1rem; }
.path-preview .path { padding-top: 2.5rem; gap: 2.25rem; }
.path-preview .node { width: 52px; height: 52px; font-size: 1.1rem; cursor: pointer; }
.path-preview .node svg { width: 22px; height: 22px; }