/* ================= Header / Top-bar / Nav (Menu burger mobile) =================
   Usage:
   - header element: <header class="site-header" id="site-header">...</header>
   - burger button:  <button id="nav-toggle" class="nav-toggle" aria-expanded="false">...</button>
   - main nav:       <nav id="primary-nav" class="primary-nav">...</nav>
   JS expected: toggle .nav-open on .site-header and .open on .nav-toggle
*/

/* rely on root color vars: --cyan, --violet, --black-alt, --muted, etc. */

/* ---------- Base / desktop layout ---------- */
.site-header {
  display: grid;
  grid-template-columns: 1fr 4fr;
  grid-template-areas: "logo nav";
  padding: 0 25px;
  min-height: 80px;
  position: sticky;
  top: 0;
  z-index: 1100;               /* header above page content */
  background: var(--black-alt);
  align-items: center;
  box-shadow: 0 1px 0 rgba(255,255,255,0.02);
}

/* logo container */
.site-header .logo {
  grid-area: logo;
  display: flex;
  align-items: center;
  justify-content: flex-start;
}
.site-header .logo a { display:inline-block; }
.site-header .logo img {
  width: 70px;
  height: auto;
  display: block;
}

/* navigation wrapper (desktop) */
.site-header .navigation {
  grid-area: nav;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 6px;
  width: 100%;
  box-sizing: border-box;
  padding-left: 12px;
}

/* top-bar (icons phone / mail / socials) */
.top-bar {
  display: flex;
  gap: 18px;
  align-items: center;
  color: var(--cyan);
  font-size: .85rem;
}
.top-bar a { text-decoration: none; color: inherit; }

/* nav row (desktop) */
.primary-nav {
  display: flex;
  align-items: flex-end;
  justify-content: flex-end;
}
.primary-nav .nav-links {
  display: flex;
  gap: 20px;
  list-style: none;
  margin: 0;
  padding: 0;
  align-items: center;
}
.primary-nav a {
  color: var(--cyan);
  text-decoration: none;
  font-size: .8rem;
  display: inline-flex;
  gap: 8px;
  align-items: center;
  padding: 6px 8px;
  border-radius: 8px;
}
.primary-nav a:hover {
  color: var(--violet);
  background: rgba(255,255,255,0.01);
}

/* small access focus style */
.primary-nav a:focus,
.top-bar a:focus {
  outline: 3px solid rgba(102,221,237,0.12);
  outline-offset: 4px;
  border-radius: 8px;
}

/* ---------- Burger button (hidden on desktop) ---------- */
.nav-toggle {
  display: none;
  background: transparent;
  border: 0;
  padding: 8px;
  cursor: pointer;
  align-self: center;
  appearance: none;
}
.hamburger {
  display: inline-grid;
  gap: 5px;
  width: 28px;
  height: 20px;
}
.hamburger .line {
  display: block;
  height: 3px;
  border-radius: 3px;
  background: var(--violet);
  transform-origin: center;
  transition: transform .28s ease, opacity .2s ease, background .25s ease;
}

/* burger open/close animation (toggle .open class on .nav-toggle) */
.nav-toggle.open .line-1 { transform: translateY(7px) rotate(45deg); background:var(--cyan); }
.nav-toggle.open .line-2 { opacity: 0; transform: scaleX(.2); }
.nav-toggle.open .line-3 { transform: translateY(-7px) rotate(-45deg); background:var(--cyan); }

/* ---------- MOBILE / SMALL SCREENS ---------- */
@media (max-width: 600px) {
  .site-header {
    grid-template-columns: 1fr;
    grid-template-areas:
      "logo"
      "nav";
    padding: 12px 18px;
    min-height: var(--header-height, 72px);
    align-items: start;
  }

  .site-header .logo {
    justify-content: center;
    margin: 6px 0;
  }
  .site-header .logo img { width: 80px; }

  .site-header .navigation {
    align-items: center;    /* centre la nav sous le logo */
  }

  /* show burger on mobile */
  .nav-toggle {
    display: block;
    position: absolute;
    top: 12px;
    right: 12px;
    z-index: 1150; /* above header so it's always visible and clickable */
  }

  /* keep top-bar visible under the logo */
  .top-bar {
    display: flex;
    gap: 15px;
    justify-content: center;
    align-items: center;
    margin-top: 6px;
  }

  /* PRIMARY NAV becomes a full-bleed fixed panel under the header */
  .primary-nav {
    align-items: flex-start;
    position: fixed;
    top: var(--header-height);   /* placed directly under header || J'ai changé cette valeur qui n'était plus de 72px mais de la valeur du header en version mobile -  De plus la variable header-height n'apparait nulle part déclarée en "root "*/
    left: 0;
    right: 0;
    width: 100%;                        /* full width (respects scrollbars) */
    height: calc(100vh - var(--header-height));
    background: var(--black-alt);
    transform-origin: top center;
    transform: translateY(-6px) scaleY(1);
    opacity: 0;
    pointer-events: none;
    transition: transform .28s ease, opacity .28s ease;
    box-shadow: none;
    padding: 28px 18px;
    box-sizing: border-box;
    z-index: 1099;       /* below header (header = 1100) so header stays visible */
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
    /*background: var(--obsidian-prunus); J'ai mis un background provisoire pour me repérer pour le calucl du top*/
  }

  /* when header has the nav-open class, show the panel */
  .site-header.nav-open .primary-nav {
    transform: translateY(0) scaleY(1);
    opacity: 1;
    pointer-events: auto;
  }

  /* nav links become vertical, centered, with controlled width */
  .primary-nav .nav-links {
    display: flex;
    flex-direction: column;
    gap: 10px;
    align-items: center;
    justify-content: flex-start;
    margin: 0 auto;
    padding: 6px 0;
    width: 100%;
    height: 100%;
  }

  .primary-nav a {
    font-size: 0.9rem;
    color: var(--cyan);
    text-align: center;
    padding: 10px 14px;
    border-radius: 10px;
    display: block;
  }
  .primary-nav a:hover { color: var(--violet); background: rgba(255,255,255,0.02); }

  /* remove header shadow when menu open to avoid visual layering artifacts */
  .site-header.nav-open {
    box-shadow: none;
    background: var(--black-alt);
  }

  /* block page scroll when menu open (JS should add/remove these classes too) */
  html.nav-locked, body.nav-locked {
    overflow: hidden;
    height: 100%;
    touch-action: none;
  }

  /* ensure burger remains clearly visible above the header/panel */
  .nav-toggle { z-index: 1150; }
}

/* ---------- Accessibility helpers ---------- */
/* hide focus outline only for mouse users (keep it for keyboard) */
:focus:not(:focus-visible) { outline: none; }