/* PHONE MENU: the ☰ button and the full-screen menu, for small screens.
   On big screens none of this is visible: the normal menu bar is used. */

/* The ☰ button: hidden on big screens */
.menu-btn {
  display: none;
  position: relative;      /* so the three lines can be placed inside it */
  width: 44px;             /* 44px is big enough to tap with a finger */
  height: 44px;
  padding: 0;
  border: 0;
  background: transparent;
  color: var(--navy);
  cursor: pointer;
}

/* The three lines of the ☰: each <span> is drawn as one short, thick line */
.menu-btn span {
  position: absolute;
  left: 12px;
  width: 20px;
  height: 2px;
  border-radius: 2px;
  background: currentColor;   /* the same colour as the button's text: navy */
}
.menu-btn span:nth-child(1) { top: 15px; }   /* nth-child(1) = the first span, the top line */
.menu-btn span:nth-child(2) { top: 21px; }
.menu-btn span:nth-child(3) { top: 27px; }

/* On small screens (800px wide or less): hide the normal menu bar, show ☰ instead */
@media (max-width: 800px) {
  .main-nav { display: none; }
  .menu-btn { display: block; }
}

/* The menu: a white page that covers the whole screen */
.phone-menu {
  width: 100%;
  height: 100%;
  max-width: none;          /* a <dialog> normally has a maximum size and sits in the middle. Not this one */
  max-height: none;
  margin: 0;
  padding: 0 16px 32px;     /* 16px at the sides, the same as the header */
  border: 0;
  background: var(--white);
  color: var(--navy);
}

/* Only while it is open: the parts in a column, top to bottom */
.phone-menu[open] {
  display: flex;
  flex-direction: column;
}

/* The top row: the logo on the left, ✕ on the right, as tall as the header */
.phone-menu-top {
  height: var(--header-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* The ✕ button */
.menu-close {
  width: 44px;
  height: 44px;
  padding: 0;
  border: 0;
  background: transparent;
  color: var(--navy);
  font-size: 32px;
  line-height: 1;
  cursor: pointer;
}

/* The links: big, one per line, with a thin line between them */
.phone-menu-links {
  display: flex;
  flex-direction: column;
  margin-top: 16px;
}
.phone-menu-links a {
  display: flex;
  justify-content: space-between;   /* the ⌄ goes to the right end */
  align-items: center;
  padding: 14px 0;
  font-size: 22px;
  font-weight: 400;
  border-bottom: 1px solid var(--lavender);
}

/* The "Sign the Manifesto" button: at the bottom, full width */
.phone-menu .btn {
  margin-top: auto;      /* "auto" takes all the empty space above it, which pushes the button to the bottom */
  text-align: center;
  padding: 16px 24px;
  font-size: 13px;
}

/* While the menu is open, the page behind it can't scroll */
html:has(.phone-menu[open]) { overflow: hidden; }