/* ============================================================
   PIER — styles/pier-layout.css
   Project : Pier (rebuild of Piererra portfolio + tools)
   Phase   : 2 — Portfolio shell

   This file owns structural layout only:
     - Page container / max-width
     - Nav bar layout
     - Section spacing / grid rhythm
     - Responsive breakpoints

   Requires styles/pier-tokens.css. Pairs with styles/pier-components.css
   (which owns visual styling of individual pieces: buttons, cards, chips).
============================================================ */

.pier-container {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ── Nav ── */
.pier-nav {
  position: sticky;
  top: 0;
  z-index: 40;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 18px 24px;
  background: color-mix(in srgb, var(--pier-bg) 88%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--pier-border);
}

.pier-nav__links {
  display: flex;
  align-items: center;
  gap: 28px;
}

.pier-nav__controls {
  display: flex;
  align-items: center;
  gap: 12px;
}

.pier-nav__mobile-menu {
  position: fixed;
  inset: 0 0 auto 0;
  top: 64px;
  z-index: 39;
  display: none;
  flex-direction: column;
  gap: 4px;
  padding: 16px 24px 24px;
  background: var(--pier-panel);
  border-bottom: 1px solid var(--pier-border);
}

.pier-nav__mobile-menu[data-open="true"] {
  display: flex;
}

@media (min-width: 721px) {
  .pier-nav__mobile-menu { display: none !important; }
}

@media (max-width: 720px) {
  .pier-nav__links { display: none; }
  .pier-nav { padding: 16px; gap: 12px; }
  .pier-nav__controls { gap: 8px; }
}

@media (max-width: 420px) {
  .pier-nav__controls .pier-btn--primary { display: none; }
}

/* ── Sections ── */
.pier-section {
  padding: 88px 0;
  border-bottom: 1px solid var(--pier-border);
}

.pier-section:last-of-type {
  border-bottom: none;
}

.pier-hero {
  padding: 120px 0 96px;
}

/* ── About: two-column text + timeline ── */
.pier-about {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 56px;
  align-items: start;
  margin-top: 40px;
}

@media (max-width: 780px) {
  .pier-about { grid-template-columns: 1fr; gap: 40px; }
}

/* ── Skills: chip grid ── */
.pier-skills__grid {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 32px;
}

/* ── Projects: featured card + tool tile grid ── */
.pier-tool-tiles {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  margin-top: 24px;
}

@media (max-width: 560px) {
  .pier-tool-tiles { grid-template-columns: 1fr; }
}

/* ── Reveal-on-scroll target (see scripts/pier-nav.js) ── */
.pier-reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

.pier-reveal[data-visible="true"] {
  opacity: 1;
  transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
  .pier-reveal { opacity: 1; transform: none; transition: none; }
}

/* ── Footer ── */
.pier-footer {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 32px 24px 40px;
  max-width: 960px;
  margin: 0 auto;
}