/* ============================================
   PixelCalm — Layout (Header, Footer, Pages)
   ============================================ */

/* ── Page Container ── */
.page {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.page-content {
  flex: 1;
  padding-top: var(--header-height);
}

.container {
  width: 100%;
  max-width: var(--container-xl);
  margin: 0 auto;
  padding: 0 var(--space-6);
}

.container-sm { max-width: var(--container-sm); }
.container-md { max-width: var(--container-md); }
.container-lg { max-width: var(--container-lg); }

/* ── Header ── */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  z-index: var(--z-header);
  background: rgba(12, 10, 9, 0.7);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-subtle);
  transition: background var(--duration-normal) var(--ease-out);
}

.header.scrolled {
  background: rgba(12, 10, 9, 0.94);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  max-width: var(--container-xl);
  margin: 0 auto;
  padding: 0 var(--space-6);
}

/* ── Logo ── */
.logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
  color: var(--text-primary);
  flex-shrink: 0;
}

.logo-icon {
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  box-shadow: 0 0 20px var(--glow-primary);
  position: relative;
}

.logo-icon::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, transparent 40%, rgba(255,255,255,0.2));
  border-radius: inherit;
}

.logo-text {
  font-size: var(--text-lg);
  font-weight: 700;
  letter-spacing: var(--tracking-tight);
}

/* ── Navigation ── */
.nav {
  display: flex;
  align-items: center;
  gap: var(--space-1);
}

.nav-link {
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-sm);
  color: var(--text-secondary);
  border-radius: var(--radius-md);
  transition: all var(--duration-fast) var(--ease-out);
  font-weight: 500;
}

.nav-link:hover {
  color: var(--text-primary);
  background: rgba(245, 158, 11, 0.05);
}

.nav-link.active {
  color: var(--color-primary-light);
  background: rgba(245, 158, 11, 0.08);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

/* ── Mobile menu ── */
.mobile-toggle {
  display: none;
  width: 36px;
  height: 36px;
  background: none;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  cursor: pointer;
  color: var(--text-primary);
  align-items: center;
  justify-content: center;
  font-size: 18px;
}

@media (max-width: 768px) {
  .mobile-toggle {
    display: flex;
  }

  .nav {
    display: none;
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--bg-primary);
    flex-direction: column;
    padding: var(--space-6);
    gap: var(--space-2);
    z-index: var(--z-overlay);
  }

  .nav.open {
    display: flex;
  }

  .nav-link {
    width: 100%;
    padding: var(--space-4);
    font-size: var(--text-base);
  }

  .nav-actions {
    display: none;
  }

  .nav-actions.open {
    display: flex;
    flex-direction: column;
    width: 100%;
    margin-top: var(--space-4);
    padding-top: var(--space-4);
    border-top: 1px solid var(--border-subtle);
  }

  .nav-actions.open .btn {
    width: 100%;
    justify-content: center;
  }
}

/* ── Footer ── */
.footer {
  border-top: 1px solid var(--border-subtle);
  background: var(--bg-secondary);
  padding: var(--space-16) 0 var(--space-8);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--space-10);
  margin-bottom: var(--space-12);
}

.footer-brand {
  max-width: 280px;
}

.footer-brand-desc {
  font-size: var(--text-sm);
  color: var(--text-muted);
  margin-top: var(--space-4);
  line-height: var(--leading-relaxed);
}

.footer-col-title {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--space-4);
  text-transform: uppercase;
  letter-spacing: var(--tracking-wide);
}

.footer-link {
  display: block;
  font-size: var(--text-sm);
  color: var(--text-muted);
  padding: var(--space-1) 0;
  transition: color var(--duration-fast) var(--ease-out);
}

.footer-link:hover {
  color: var(--color-primary-light);
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: var(--space-8);
  border-top: 1px solid var(--border-subtle);
  font-size: var(--text-xs);
  color: var(--text-muted);
}

@media (max-width: 768px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-8);
  }

  .footer-brand {
    grid-column: span 2;
    max-width: none;
  }

  .footer-bottom {
    flex-direction: column;
    gap: var(--space-3);
    text-align: center;
  }
}

@media (max-width: 480px) {
  .footer-grid {
    grid-template-columns: 1fr;
  }

  .footer-brand {
    grid-column: 1;
  }
}

/* ── Section Spacing ── */
.section {
  padding: var(--space-20) 0;
}

.section-lg {
  padding: var(--space-24) 0;
}

@media (max-width: 768px) {
  .section {
    padding: var(--space-12) 0;
  }

  .section-lg {
    padding: var(--space-16) 0;
  }
}