.signin-content {
  grid-area: main;
  display: grid;
  align-items: center;
  padding: 48px 20px 72px;
}

.signin-shell {
  max-width: 480px;
  margin: 0 auto;
  padding: 40px 32px 32px;
  background:
    radial-gradient(circle at top, rgba(59, 130, 246, 0.12), transparent 55%),
    linear-gradient(180deg, rgba(15, 23, 42, 0.96), rgba(2, 6, 23, 0.98));
  border: 1px solid rgba(148, 163, 184, 0.18);
  border-radius: 20px;
  box-shadow: 0 24px 60px rgba(2, 6, 23, 0.42);
  text-align: center;
}

.signin-kicker {
  color: #60a5fa;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 0.78rem;
  font-weight: 700;
  margin-bottom: 10px;
}

.signin-copy h1 {
  margin-bottom: 12px;
  color: #f8fafc;
}

.signin-intro {
  color: #cbd5e1;
  font-size: 1rem;
  line-height: 1.6;
}

.signin-actions {
  display: grid;
  gap: 14px;
  margin-top: 30px;
}

.signin-google-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 14px;
  width: 100%;
  min-height: 56px;
  padding: 0 20px;
  border: 1px solid rgba(226, 232, 240, 0.8);
  border-radius: 12px;
  background: #fff;
  color: #111827;
  font-size: 1.05rem;
  font-weight: 600;
  cursor: pointer;
  transition: border-color 140ms ease, box-shadow 140ms ease, transform 140ms ease;
}

.signin-google-button:hover {
  border-color: #fff;
  box-shadow: 0 12px 28px rgba(15, 23, 42, 0.24);
  transform: translateY(-1px);
}

.signin-google-button:focus-visible {
  outline: none;
  border-color: #2563eb;
  box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.14);
}

.signin-google-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 22px;
  height: 22px;
  flex: 0 0 auto;
}

.signin-google-mark svg {
  width: 100%;
  height: 100%;
}

.signin-cancel {
  color: #94a3b8;
  font-size: 0.95rem;
  text-decoration: none;
}

.signin-cancel:hover {
  color: #f8fafc;
}

@media (max-width: 768px) {
  .signin-shell {
    padding: 32px 22px 24px;
  }
}