/* ============================================================================
   NOVA Logistics — Layout & responsive grid system
   Generalizes the auto-fill/minmax card-grid pattern already proven in
   index.php (.trip-grid), carpool.php (.board-grid), and admin's
   .stats-grid into reusable utility classes — plus fills the missing
   "phablet" (600px) breakpoint tier found during the redesign audit.

   ── Agreed breakpoint scale (documented here; native @custom-media isn't
      available without a build step, so these are literal values used
      consistently across all stylesheets and page-level overrides):
        420px  — small phones
        600px  — large phones / phablets   (CURRENTLY MISSING site-wide)
        768px  — tablets / admin sidebar collapse
        1024px — small laptops / landscape tablets
        1280px — wide desktop (most containers cap at 900px anyway)
   ========================================================================= */

/* ── Containers ──────────────────────────────────────────────────────────── */
.container        { max-width: 1100px; margin: 0 auto; padding: 0 20px; }
.container-narrow { max-width: 680px;  margin: 0 auto; padding: 0 20px; }
.container-wide   { max-width: 1280px; margin: 0 auto; padding: 0 20px; }

/* ── Hero shell (mirrors index.php / carpool.php / *-terms.php patterns) ──── */
.hero {
  background: var(--navy);
  padding: clamp(28px, 6vw, 48px) 20px clamp(32px, 7vw, 48px);
  text-align: center;
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 50% 0%, rgba(201,168,76,.15) 0%, transparent 70%);
  pointer-events: none;
}
.hero-inner { position: relative; z-index: 1; max-width: 700px; margin: 0 auto; }
.hero img {
  width: 80px; height: 80px;
  border-radius: 50%;
  object-fit: cover;
  border: 3px solid var(--gold);
  margin: 0 auto var(--space-4);
}
.hero h1 { color: var(--white); margin-bottom: var(--space-2); }
.hero p  { color: rgba(255,255,255,.7); font-size: var(--font-size-body); }

/* Corner link inside a hero (admin-link / home-link patterns unified) */
.hero-corner-link {
  position: absolute;
  top: 0; left: 0;
  z-index: 2;
  display: flex;
  align-items: center;
  min-height: 44px;
  background: rgba(255,255,255,.1);
  color: rgba(255,255,255,.7);
  text-decoration: none;
  font-size: var(--font-size-sm);
  padding: 8px 14px;
  border-radius: 0 0 8px 0;
  transition: background var(--transition-fast);
}
.hero-corner-link.right { left: auto; right: 0; border-radius: 0 0 0 8px; }
.hero-corner-link:hover { background: rgba(255,255,255,.2); color: var(--white); text-decoration: none; }

/* ── Fluid card grids ────────────────────────────────────────────────────── */
.grid-cards {
  display: grid;
  gap: var(--space-5);
  grid-template-columns: repeat(auto-fill, minmax(var(--card-min, 280px), 1fr));
}
.grid-cards-sm { --card-min: 220px; }
.grid-cards-lg { --card-min: 320px; }

.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-3); }
.grid-3 { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: var(--space-3); }
.grid-responsive-3 { display: grid; gap: var(--space-4); grid-template-columns: repeat(auto-fill, minmax(180px, 1fr)); }

/* ── Site footer (normalizes the previously-inconsistent per-page markup) ─── */
footer {
  text-align: center;
  padding: var(--space-5);
  font-size: var(--font-size-sm);
  color: var(--text-muted);
  border-top: 1px solid var(--border);
}

/* ── Section helpers ─────────────────────────────────────────────────────── */
.section-title {
  font-size: var(--font-size-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--text-muted);
  margin-bottom: var(--space-5);
}
.empty-state, .empty {
  text-align: center;
  padding: clamp(40px, 10vw, 64px) 20px;
  color: var(--text-muted);
}
.empty-state .empty-icon, .empty .empty-icon { font-size: 44px; margin-bottom: var(--space-3); }

/* ── Responsive tiers ────────────────────────────────────────────────────── */

/* 1024px — small laptops / landscape tablets */
@media (max-width: 1024px) {
  .container, .container-wide { padding: 0 18px; }
}

/* 768px — tablets (also where admin sidebar collapses, see admin overrides) */
@media (max-width: 768px) {
  .grid-2, .grid-3 { grid-template-columns: 1fr; }
}

/* 600px — phablets / large phones (the previously-missing tier) */
@media (max-width: 600px) {
  .container, .container-narrow, .container-wide { padding: 0 16px; }
  .grid-cards { gap: var(--space-4); }
  .hero { padding-top: 28px; padding-bottom: 32px; }
}

/* 420px — small phones */
@media (max-width: 420px) {
  .grid-cards, .grid-cards-sm, .grid-cards-lg, .grid-responsive-3 {
    grid-template-columns: 1fr;
  }
}