/* ==========================================================================
   VPNQF · tutorial.css
   Page-scoped layout for the five-step onboarding flow:
   numbered step rail, counter sub-steps, platform import blocks,
   deeper-reading link cards.
   ========================================================================== */

/* ---- step rail ---- */

.step-flow{
  display:grid;
  gap:clamp(26px,3.4vw,42px);
  margin-top:clamp(22px,3vw,34px);
}

.step{
  position:relative;
  display:grid;
  grid-template-columns:56px minmax(0,1fr);
  gap:0 clamp(14px,2vw,22px);
  min-width:0;
}

.step::before{
  content:"";
  position:absolute;
  left:27px;
  top:62px;
  bottom:calc(-1 * clamp(26px,3.4vw,42px));
  border-left:2px dashed var(--accent-24);
}
.step:last-child::before{display:none;}

.step-badge{
  position:relative;
  z-index:1;
  grid-row:1 / span 2;
  display:grid;
  place-items:center;
  width:56px;
  height:56px;
  margin:0;
  border-radius:50%;
  background-image:linear-gradient(180deg,var(--accent-light),var(--accent) 55%,var(--accent-dark));
  color:var(--white);
  font-family:var(--font-mono);
  font-size:15px;
  font-weight:700;
  letter-spacing:.02em;
  box-shadow:0 16px 26px -14px var(--accent-40),inset 0 1px 0 var(--white-24);
  flex:none;
}

.step-body{min-width:0;}

.step-title{
  margin:0 0 10px;
  padding-top:6px;
  font-size:clamp(21px,2.1vw,27px);
  line-height:1.22;
  letter-spacing:-.024em;
}

.step-lead{
  margin:0 0 var(--space-4);
  font-size:15px;
  line-height:1.8;
  color:var(--text-muted);
}

.step-body p{
  margin:0 0 var(--space-3);
  font-size:14.5px;
  line-height:1.8;
  color:var(--text-muted);
}
.step-body p strong{color:var(--text);}
.step-body h3{
  margin:var(--space-6) 0 var(--space-2);
  font-size:clamp(17px,1.5vw,20px);
  letter-spacing:-.018em;
}
.step-body pre{margin-block:var(--space-3) var(--space-4);}

.step-actions{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:10px;
  margin-top:var(--space-4);
}

/* ---- numbered sub-steps ---- */

.tut-steps{
  counter-reset:tut;
  display:grid;
  gap:11px;
  margin:0 0 var(--space-4);
  padding:0;
  list-style:none;
}
.tut-steps li{
  position:relative;
  min-width:0;
  padding-left:36px;
  font-size:14.5px;
  line-height:1.8;
  color:var(--text-muted);
}
.tut-steps li::before{
  counter-increment:tut;
  content:counter(tut,decimal-leading-zero);
  position:absolute;
  left:0;
  top:3px;
  display:grid;
  place-items:center;
  width:24px;
  height:24px;
  border:1px solid var(--accent-24);
  border-radius:50%;
  background:var(--accent-08);
  font-family:var(--font-mono);
  font-size:10.5px;
  font-weight:700;
  line-height:1;
  color:var(--accent-dark);
}

/* ---- platform import blocks ---- */

.step-body .plat-grid{margin:0 0 var(--space-5);}

.tut-plat{
  min-width:0;
  margin:0 0 var(--space-4);
  padding:16px 18px 14px;
  border:1px solid var(--border);
  border-radius:var(--r-md);
  background:var(--bg-panel);
  box-shadow:var(--shadow-soft);
}
.tut-plat:last-of-type{margin-bottom:var(--space-4);}

.tut-plat-head{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:10px;
  margin-bottom:8px;
}
.tut-plat-icon{
  display:grid;
  place-items:center;
  width:30px;
  height:30px;
  border-radius:var(--r-xs);
  background:var(--surface-3);
  color:var(--text);
  flex:none;
}
.tut-plat-name{
  margin:0;
  font-size:16px;
  letter-spacing:-.014em;
}
.tut-plat-tag{
  margin-left:auto;
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.12em;
  color:var(--text-muted);
  white-space:nowrap;
}
.tut-plat p{
  margin:0 0 8px;
  font-size:14px;
  line-height:1.78;
  color:var(--text-muted);
}
.tut-plat p:last-child{margin-bottom:0;}

/* ---- callout links ---- */

.callout a{
  color:var(--accent-dark);
  font-weight:600;
  text-decoration:underline;
  text-underline-offset:2px;
}

/* ---- deeper-reading link cards ---- */

.tut-links{
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(220px,1fr));
  gap:14px;
  margin:0 0 var(--space-6);
  padding:0;
  list-style:none;
}
.tut-links li{min-width:0;}
.tut-links a{
  display:flex;
  flex-direction:column;
  gap:6px;
  height:100%;
  min-width:0;
  padding:18px;
  border:1px solid var(--border);
  border-radius:var(--r-md);
  background:var(--surface-1);
  box-shadow:var(--shadow-card);
  text-decoration:none;
  transition:transform .2s ease,border-color .2s ease,box-shadow .2s ease;
}
.tut-links a:hover{
  transform:translateY(-2px);
  border-color:var(--border-strong);
  box-shadow:0 22px 38px -28px var(--ink-40);
}
.tut-link-tag{
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.14em;
  color:var(--accent-dark);
}
.tut-link-title{
  font-family:var(--font-display);
  font-size:16px;
  font-weight:900;
  letter-spacing:-.018em;
  line-height:1.35;
  color:var(--text);
}
.tut-link-desc{
  font-size:13px;
  line-height:1.7;
  color:var(--text-muted);
}

/* ---- responsive ---- */

@media (max-width:640px){
  .tut-plat{padding:14px;}
  .tut-plat-tag{margin-left:0;}
}

@media (max-width:560px){
  .step{grid-template-columns:44px minmax(0,1fr);gap:0 12px;}
  .step-badge{width:44px;height:44px;font-size:12.5px;}
  .step::before{left:21px;top:52px;}
  .step-title{padding-top:2px;}
  .tut-steps li{padding-left:32px;}
}

@media (prefers-reduced-motion: reduce){
  .tut-links a{transition:none;}
  .tut-links a:hover{transform:none;}
}