/* =============================================================================
   assets/css/header.css
   =============================================================================
   Header styles (sidebar + hamburger & theme toggles)
   Uses global CSS variables from styles.css or fallbacks defined here.
   ============================================================================= */

/* —————————— 0) Global/fallback variables —————————— */
:root {
  --hd-surface:        var(--surface, #ffffff);
  --hd-text:           var(--text, #1f2937);
  --hd-accent:         var(--accent, #2563eb);
  --hd-accent-hover:   var(--accent-hover, #1e40af);
  --hd-shadow-light:   var(--shadow-light, rgba(0,0,0,0.1));
  --hd-shadow-strong:  var(--shadow-strong, rgba(0,0,0,0.2));
  --hd-radius:         var(--radius, 15px);
  --hd-transition:     var(--transition, 0.3s ease);

  /* Toggle buttons in Light mode */
  --toggle-bg:         rgba(0,0,0,0.4);
  --toggle-bg-hover:   rgba(0,0,0,0.6);
  --toggle-icon:       var(--surface, #ffffff);

  /* Size and offset for toggles */
  --toggle-size:       2.5rem;
  --toggle-offset:     0.5rem;
}

/* —————————— 1) Dark mode overrides —————————— */
html[data-theme="dark"] {
  --toggle-bg:         rgba(255,255,255,0.4);
  --toggle-bg-hover:   rgba(255,255,255,0.6);
  --toggle-icon:       var(--hd-text);
}

/* —————————— 2) Box-sizing & Cairo font inside header —————————— */
.site-header,
.site-header * {
  box-sizing: border-box;
  font-family: var(--font-base, 'Cairo', sans-serif);
  font-size: var(--font-size, 16px);
  line-height: var(--line-height, 1.6);
}

/* —————————— 3) Header container —————————— */
.site-header {
  position: relative;   /* to contain absolute toggles */
  width: 100%;
  top: 0;
  left: 0;
  z-index: 100;
  background: var(--hd-surface);
  transition: background var(--hd-transition);
}

/* —————————— 4) Sidebar + overlay —————————— */
.site-header .sidebar {
  position: fixed;
  top: 0rem; left: 0;
  width: 250px;
  max-height: calc(100vh - 2rem);
  overflow-y: auto;
  background: var(--hd-surface);
  backdrop-filter: blur(10px);
  box-shadow: 0 8px 32px var(--hd-shadow-strong);
  border-radius: 0 var(--hd-radius) var(--hd-radius) 0;
  transform: translateX(-100%);
  transition: transform 0.4s cubic-bezier(0.25,1,0.5,1);
  z-index: 10000;
}
.site-header .sidebar.open {
  transform: translateX(0);
}
.site-header .sidebar::-webkit-scrollbar {
  width: 6px;
}
.site-header .sidebar::-webkit-scrollbar-thumb {
  background: rgba(255,255,255,0.2);
  border-radius: 3px;
}

.site-header .overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.4);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity var(--hd-transition), visibility var(--hd-transition);
  z-index: 900;
}
.site-header .overlay.open {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}

/* —————————— 5) Sidebar links —————————— */
.site-header .sidebar-menu {
  list-style: none;
  margin: 0;
  padding: 1rem 0;
}
.site-header .sidebar-menu li + li {
  margin-top: 0.5rem;
}
.site-header .sidebar-menu a {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.75rem 1rem;
  font-size: 1rem;
  color: var(--hd-text);
  text-decoration: none;
  border-radius: var(--hd-radius);
  transition: background var(--hd-transition),
              color var(--hd-transition),
              box-shadow var(--hd-transition);
}
.site-header .sidebar-menu a:hover {
  background: var(--hd-accent);
  color: var(--hd-surface);
  box-shadow: inset 0 0 8px rgba(0,0,0,0.1);
}

/* —————————— 6) Font Awesome icons —————————— */
.site-header [class*="fa-"] {
  font-family: "Font Awesome 5 Free"; /* or 6 Free */
  font-weight: 900;
}

/* ==========================
   Toggle Buttons – ثابتتان في الحافة
   ========================== */

/* 1) زرّ الهامبرغر */
.menu-toggle {
  position: absolute !important;              /* ثابت بالنسبة للنافذة */
  top: 0.5 !important;    /* المسافة من الأعلى */
  left: var(--toggle-offset) !important;   /* المسافة من اليسار */
  
  width: var(--toggle-size) !important;
  height: var(--toggle-size) !important;
  padding: 0 !important;
  
  background: var(--toggle-bg) !important;
  color: var(--toggle-icon) !important;
  border: none !important;
  border-radius: 50% !important;
  
  display: flex !important;
  align-items: center !important;
  justify-content: center !important;
  
  cursor: pointer !important;
  z-index: 1 !important;               /* أعلى من sidebar */
  
  transition: 
    background var(--hd-transition) !important,
    transform var(--hd-transition) !important;
}

/* 2) زرّ تبديل الثيم */
#theme-toggle {
  position: absolute !important;
  top: 0.5 !important;
  right: var(--toggle-offset) !important;  /* المسافة من اليمين */
  
  width: var(--toggle-size) !important;
  height: var(--toggle-size) !important;
  padding: 0 !important;
  
  background: var(--toggle-bg) !important;
  color: var(--toggle-icon) !important;
  border: none !important;
  border-radius: 50% !important;
  
  display: flex !important;
  align-items: center !important;
  justify-content: center !important;
  
  cursor: pointer !important;
  z-index: 1 !important;
  
  transition: 
    background var(--hd-transition) !important,
    transform var(--hd-transition) !important;
}

/* 3) تأثير Hover */
.menu-toggle:hover,
#theme-toggle:hover {
  background: var(--toggle-bg-hover) !important;
  transform: scale(1.1) !important;
}