/* ==========================================================================
   COMPONENTS
   Reusable pieces: nav, scroll rail, buttons, cards, chips, work items.
   Section-specific arrangement/layout lives in sections.css.
   ========================================================================== */

/* ---------- Scroll progress rail ---------- */

.rail{
  position: fixed;
  left: var(--space-md);
  top: 50%;
  transform: translateY(-50%);
  z-index: var(--z-rail);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-sm);
}

.rail-track{
  width: 2px;
  height: 160px;
  background: var(--border);
  border-radius: 2px;
  position: relative;
  overflow: hidden;
}

/* Height of .rail-fill is driven by interactions.js (0%–100% scroll progress) */
.rail-fill{
  position: absolute;
  top: 0; left: 0;
  width: 100%;
  height: 0%;
  background: var(--accent-violet);
  border-radius: 2px;
  transition: height var(--dur-fast) linear;
}

.rail-label{
  font-size: 0.62rem;
  letter-spacing: 0.14em;
  color: var(--ink-faint);
  writing-mode: vertical-rl;
  transform: rotate(180deg);
  white-space: nowrap;
}

@media (max-width: 900px){
  .rail{ display: none; }
}

/* ---------- Nav ---------- */

.site-nav{
  position: sticky;
  top: 0;
  z-index: var(--z-nav);
  background: rgba(10, 11, 16, 0.82);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.nav-inner{
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
  padding-block: 18px;
}

.logo{
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.05rem;
  letter-spacing: -0.02em;
  flex-shrink: 0;
}

.nav-links{
  display: flex;
  gap: var(--space-lg);
  flex: 1;
  justify-content: center;
}

.nav-links a{
  font-family: var(--font-mono);
  font-size: 0.86rem;
  color: var(--ink-dim);
  position: relative;
  transition: color var(--dur-fast) var(--ease-out);
}

.nav-links a:hover,
.nav-links a.is-active{
  color: var(--ink);
}

/* Underline grows from center on hover/active — set via JS class toggle */
.nav-links a::after{
  content: "";
  position: absolute;
  left: 50%; bottom: -6px;
  width: 0; height: 1px;
  background: var(--accent-violet);
  transition: width var(--dur-fast) var(--ease-out), left var(--dur-fast) var(--ease-out);
}
.nav-links a:hover::after,
.nav-links a.is-active::after{
  width: 100%; left: 0;
}

.nav-status{
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.78rem;
  color: var(--ink-dim);
  flex-shrink: 0;
}

.status-dot{
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--signal-green);
  box-shadow: 0 0 0 0 rgba(74, 222, 128, 0.5);
  animation: statusPulse 2.4s infinite;
  flex-shrink: 0;
}

@keyframes statusPulse{
  0%   { box-shadow: 0 0 0 0 rgba(74, 222, 128, 0.45); }
  70%  { box-shadow: 0 0 0 8px rgba(74, 222, 128, 0); }
  100% { box-shadow: 0 0 0 0 rgba(74, 222, 128, 0); }
}

@media (prefers-reduced-motion: reduce){
  .status-dot{ animation: none; }
}

.nav-toggle{
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 6px;
}
.nav-toggle span{
  width: 20px; height: 2px;
  background: var(--ink);
  border-radius: 2px;
  transition: transform var(--dur-fast) var(--ease-out), opacity var(--dur-fast) var(--ease-out);
}

@media (max-width: 900px){
  .nav-links{
    position: fixed;
    top: 64px; left: 0; right: 0;
    flex-direction: column;
    background: var(--bg-panel);
    border-bottom: 1px solid var(--border);
    padding: var(--space-md) var(--wrap-pad-x);
    gap: var(--space-md);
    transform: translateY(-8px);
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--dur-fast) var(--ease-out), transform var(--dur-fast) var(--ease-out);
  }
  .nav-links.is-open{
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
  }
  .nav-status{ display: none; }
  .nav-toggle{ display: flex; }
}

/* ---------- Buttons ---------- */

.btn{
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 26px;
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-size: 0.85rem;
  border: 1px solid transparent;
  transition: transform var(--dur-fast) var(--ease-out),
              background var(--dur-fast) var(--ease-out),
              border-color var(--dur-fast) var(--ease-out),
              color var(--dur-fast) var(--ease-out);
  position: relative;
  will-change: transform;
}

.btn-amber{
  background: var(--accent-amber);
  color: var(--accent-amber-ink);
  font-weight: 500;
}
.btn-amber:hover{
  background: #ffb872;
}

.btn-ghost{
  border-color: var(--border-strong);
  color: var(--ink);
}
.btn-ghost:hover{
  border-color: var(--accent-violet);
  color: var(--accent-violet);
}

.nav-cta{
  padding: 9px 18px;
  flex-shrink: 0;
}

@media (max-width: 900px){
  .nav-cta{ display: none; }
}

/* Magnetic buttons: interactions.js applies an inline transform (translate)
   on mousemove within a radius; this just establishes the transition base */
[data-magnetic]{
  transition: transform var(--dur-fast) var(--ease-out);
}

/* ---------- Cards ---------- */

.card{
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: var(--space-lg) var(--space-md);
  position: relative;
  transition: border-color var(--dur-fast) var(--ease-out),
              background var(--dur-fast) var(--ease-out);
}

.card:hover{
  border-color: var(--border-strong);
  background: var(--bg-panel-raised);
}

/* Tilt cards: interactions.js sets --rx / --ry (rotation degrees) inline
   on mousemove; perspective lives on the parent grid in sections.css */
[data-tilt]{
  transform: perspective(900px) rotateX(var(--ry, 0deg)) rotateY(var(--rx, 0deg));
  transition: transform var(--dur-fast) var(--ease-out);
}

.card-tag{
  font-size: 0.72rem;
  color: var(--accent-violet);
  letter-spacing: 0.08em;
  display: block;
  margin-bottom: var(--space-sm);
}

.card h3{
  margin-bottom: var(--space-xs);
}

.card p{
  color: var(--ink-dim);
  font-size: 0.94rem;
  margin-bottom: var(--space-sm);
}

.card-list li{
  font-size: 0.86rem;
  color: var(--ink-dim);
  padding-left: 16px;
  position: relative;
  margin-bottom: 6px;
}
.card-list li::before{
  content: "—";
  position: absolute;
  left: 0;
  color: var(--ink-faint);
}

.check-list li::before{
  content: "✓";
  color: var(--accent-amber);
  font-size: 0.78rem;
}

/* ---------- Chips ---------- */

.chip-row{
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.chip{
  font-family: var(--font-mono);
  font-size: 0.72rem;
  padding: 5px 12px;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  color: var(--ink-dim);
}

/* ---------- Work item ---------- */

.work-item{
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: var(--space-lg);
}

.work-num{
  font-size: 0.8rem;
  color: var(--ink-faint);
}

.work-item h3{
  margin: var(--space-xs) 0 var(--space-sm);
}

.work-links{
  display: flex;
  gap: var(--space-md);
  margin-top: var(--space-sm);
}
.work-links a{
  color: var(--accent-violet);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  border-bottom: 1px solid transparent;
  transition: border-color var(--dur-fast) var(--ease-out);
}
.work-links a:hover{
  border-color: var(--accent-violet);
}

.work-desc{
  color: var(--ink-dim);
  font-size: 0.94rem;
}

/* ---------- Process ---------- */

.process-item{
  border-top: 1px solid var(--border);
  padding-top: var(--space-md);
}

.process-num{
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 600;
  color: var(--accent-amber);
  opacity: 0.9;
  display: block;
  margin-bottom: var(--space-sm);
}

/* ---------- Stat counters (hero) ---------- */

.stat{
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.stat-num{
  font-family: var(--font-display);
  font-size: 1.8rem;
  font-weight: 600;
  color: var(--ink);
}

.stat-label{
  font-size: 0.7rem;
  color: var(--ink-faint);
  letter-spacing: 0.06em;
}