/* =====================================================================
   styles.css — Full Responsive, Slim Navbar, Compact Sidebar & Cleaned UI
   ===================================================================== */

/* --- 1. ROOT VARIABLES --- */
:root {
  --primary: #1c3f94; 
  --primary-light: #4361ee;
  --secondary: #1e293b; 
  --bg-light: #f8fafc;
  --text-main: #1b263b; 
  --white: #ffffff;
  
  --color-sec: #9c27b0; 
  --color-mid: #ff9800; 
  --color-pri: #4CAF50;
  
  --sidebar-purple-hover: #6a1b9a; 
  --sidebar-orange-hover: #ef6c00; 
  --sidebar-green-hover: #2e7d32;
  
  /* SLIM NAVBAR HEIGHT */
  --header-h: 48px; 
  
  --radius: 12px; 
  --radius-lg: 20px;
  
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.05); 
  --shadow: 0 4px 15px rgba(0,0,0,0.08);
  --shadow-hover: 10px 25px rgba(0,0,0,0.12);
  
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);

  --welcome-angle: 135deg;
  --welcome-col1: #f8f9fa; 
  --welcome-col2: #0083ff; 
  --welcome-col3: #0083ff;
  --welcome-col4: #4CAF50; 
  --welcome-col5: #4CAF50; 
  --welcome-col6: #ff9800;
  --welcome-col7: #9c27b0; 
  --welcome-col8: #9c27b0; 
  --welcome-col9: #1b263b;
  --welcome-bg-size: 300% 300%;
  --welcome-gradient-dur: 18s; 
  --welcome-float-dur: 8s; 
  --welcome-blob-dur: 20s;
  --welcome-gloss-opacity: .55;
}

html.dark-mode, 
body.dark-mode {
  --bg-light: #0f172a; 
  --text-main: #f1f5f9; 
  --white: #1e293b; 
  --secondary: #020617;
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.2); 
  --shadow: 0 4px 20px rgba(0,0,0,0.3);
  --sidebar-purple-hover: #b27ad9; 
  --sidebar-orange-hover: #ffbf1d; 
  --sidebar-green-hover: #44e680;
}

/* --- 2. RESET & BASE --- */
* { 
  margin: 0; 
  padding: 0; 
  box-sizing: border-box; 
  font-family: 'Tajawal', sans-serif; 
}

body { 
  background: var(--bg-light); 
  color: var(--text-main); 
  overflow-x: hidden; 
  min-height: 100vh; 
  display: flex; 
  flex-direction: column; 
}

ul { list-style: none; }
a { text-decoration: none; color: inherit; transition: 0.2s; }
button { font-family: inherit; cursor: pointer; }

/* --- 3. HEADER LAYOUT --- */
.app-header { 
  height: var(--header-h); 
  background: var(--white); 
  box-shadow: var(--shadow); 
  position: sticky; 
  top: 0; 
  z-index: 1000; 
  display: flex; 
  align-items: center; 
  transition: transform 0.3s ease, background 0.3s; 
}

.app-header.hide-on-scroll { 
  transform: translateY(-100%); 
  box-shadow: none; 
}

.header-container { 
  width: 95%; 
  max-width: 1400px; 
  margin: 0 auto; 
  display: flex; 
  justify-content: space-between; 
  align-items: center; 
}

/* --- 4. VERTICALLY CENTERED LOGO --- */
.app-title { 
  display: flex; 
  flex-direction: column; 
  align-items: center; 
  justify-content: center;
  gap: 0; 
  text-align: center;
  transition: transform 0.2s cubic-bezier(0.175, 0.885, 0.32, 1.275);
  overflow: visible;
  height: var(--header-h);
  max-height: var(--header-h);
}

.schoolep-logo { 
  width: 32px; 
  height: 32px; 
  margin-bottom: -11px; 
  flex-shrink: 0;
  transition: transform 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
  z-index: 2;
}

.logo-text { 
  font-size: 1.15rem; 
  font-weight: 900; 
  background: linear-gradient(to right, var(--color-sec) 0%, var(--primary-light) 25%, var(--color-mid) 50%, var(--color-pri) 75%, var(--color-sec) 100%);
  background-size: 200% auto;
  color: transparent;
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  animation: logo-glow-light 4s linear infinite;
  display: block;
  line-height: 1.2; 
  margin-top: 2px; 
  padding-bottom: 2px; 
  transition: letter-spacing 0.3s ease;
}

body.dark-mode .logo-text { 
  background: linear-gradient(to right, #c084fc 0%, #60a5fa 25%, #fbbf24 50%, #4ade80 85%, #c084fc 100%);
  background-size: 200% auto;
  -webkit-background-clip: text;
  background-clip: text;
  animation: logo-glow-dark 4s linear infinite;
}

.app-title:hover .schoolep-logo { transform: translateY(-1px) scale(1.05); }
.app-title:active { transform: scale(0.95); }

@keyframes logo-glow-light {
  0% { background-position: 0% center; filter: drop-shadow(0 0 2px rgba(67, 97, 238, 0.2)); }
  50% { background-position: 100% center; filter: drop-shadow(0 0 6px rgba(156, 39, 176, 0.4)); }
  100% { background-position: 200% center; filter: drop-shadow(0 0 2px rgba(67, 97, 238, 0.2)); }
}

@keyframes logo-glow-dark {
  0% { background-position: 0% center; filter: drop-shadow(0 0 4px rgba(96, 165, 250, 0.4)); }
  50% { background-position: 100% center; filter: drop-shadow(0 0 10px rgba(192, 132, 252, 0.6)); }
  100% { background-position: 200% center; filter: drop-shadow(0 0 4px rgba(96, 165, 250, 0.4)); }
}

/* --- 5. BALANCED HEADER ACTIONS --- */
.header-actions { 
  display: flex; 
  gap: 6px; 
  align-items: center; 
}

.action-btn, 
.mobile-btn { 
  background: var(--bg-light); 
  border: none; 
  width: 30px; 
  height: 30px; 
  border-radius: 50%; 
  display: flex; 
  align-items: center; 
  justify-content: center; 
  color: var(--text-main); 
  font-size: 0.9rem; 
  transition: var(--transition); 
}

.action-btn:hover { 
  background: var(--primary); 
  color: #fff; 
  transform: translateY(-2px); 
}

#language-icon {
  font-size: 0.90em; 
  transform: scale(0.95);
}

/* --- 6. PC NAVIGATION --- */
.desktop-nav .menu-root { display: flex; gap: 12px; }
.menu-item { position: relative; }

.menu-toggle { 
  background: transparent; 
  border: none; 
  padding: 6px 16px; 
  font-weight: 800; 
  color: var(--text-main); 
  display: flex; 
  align-items: center; 
  justify-content: center; 
  gap: 8px; 
  border-radius: 8px; 
  transition: var(--transition); 
  font-size: 1.1em; 
}

.desktop-nav .menu-root > li:nth-child(1) .menu-toggle { color: var(--color-pri); }
.desktop-nav .menu-root > li:nth-child(2) .menu-toggle { color: var(--color-mid); }
.desktop-nav .menu-root > li:nth-child(3) .menu-toggle { color: var(--color-sec); }
.menu-toggle:hover { background: rgba(0,0,0,0.03); }
body.dark-mode .menu-toggle:hover { background: rgba(255,255,255,0.05); }

/* PC SUB NAVBAR */
.sub-menu { 
  position: absolute; 
  top: 120%; 
  right: 0; 
  background: var(--white); 
  min-width: 180px; 
  border-radius: var(--radius); 
  box-shadow: var(--shadow); 
  padding: 6px; 
  visibility: hidden; 
  opacity: 0; 
  transform: translateY(10px); 
  transition: 0.3s; 
  border: 1px solid rgba(0,0,0,0.05); 
  z-index: 1010; 
}

[dir="ltr"] .sub-menu { right: auto; left: 0; }
.menu-item:hover .sub-menu { visibility: visible; opacity: 1; transform: translateY(0); }

.sub-menu li a { 
  display: block; 
  padding: 10px 20px; 
  color: var(--text-main); 
  border-radius: 6px; 
  font-weight: 700; 
  font-size: 0.95rem; 
  text-align: center; 
  white-space: nowrap; 
}

.desktop-nav .menu-root > li:nth-child(1) .sub-menu li a:hover { color: var(--color-pri); background: rgba(76, 175, 80, 0.1); }
.desktop-nav .menu-root > li:nth-child(2) .sub-menu li a:hover { color: var(--color-mid); background: rgba(255, 152, 0, 0.1); }
.desktop-nav .menu-root > li:nth-child(3) .sub-menu li a:hover { color: var(--color-sec); background: rgba(156, 39, 176, 0.1); }

/* --- 7. MAIN WRAPPER & SIDEBAR CENTERED FIX --- */
.main-wrapper { 
  display: flex; 
  gap: 25px; 
  margin: 30px auto 0 auto; 
  width: 95%; 
  max-width: 1400px; 
  flex: 1; 
  align-items: flex-start; 
}

.content-area { flex: 1; min-width: 0; width: 100%; transition: width 0.3s; }

.levels-sidebar { 
  position: sticky; top: calc(var(--header-h) + 30px); order: -1; 
  width: 240px; flex-shrink: 0; transition: width 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.sidebar-card { 
  background: var(--white); border-radius: var(--radius-lg); 
  padding: 15px; box-shadow: var(--shadow-sm); border: 1px solid rgba(0,0,0,0.03); 
  display: flex; flex-direction: column; align-items: center; /* CENTER CONTENT */
}

/* --- BADGE STYLE FOR TITLES (CENTERED & BIGGER) --- */
.level-group { margin-bottom: 25px; width: 100%; transition: 0.3s; display: flex; flex-direction: column; align-items: center; }
.level-group h4 { 
  font-size: 1.25rem; /* BIGGER TITLES */
  font-weight: 800; margin-bottom: 15px; 
  padding: 10px 12px; border-radius: 10px; display: flex; 
  align-items: center; justify-content: center; gap: 10px;
  background: var(--bg-light); border: 1px solid rgba(0,0,0,0.03);
  text-align: center; width: 90%;
}

.level-group:nth-child(1) h4 { color: var(--color-sec); border-bottom: 3.5px solid var(--color-sec); }
.level-group:nth-child(2) h4 { color: var(--color-mid); border-bottom: 3.5px solid var(--color-mid); }
.level-group:nth-child(3) h4 { color: var(--color-pri); border-bottom: 3.5px solid var(--color-pri); }

/* --- SMALLER BUTTONS FOR HIERARCHY --- */
.level-btn { 
  display: flex; align-items: center; justify-content: center; gap: 8px; width: 90%; 
  padding: 10px 12px; margin-bottom: 10px; border-radius: 10px; 
  font-weight: 700; 
  font-size: 0.85rem; /* ALWAYS SMALLER THAN TITLES */
  color: #fff; transition: var(--transition); white-space: nowrap;
}

.level-btn i { font-size: 1.1rem; flex-shrink: 0; }
.btn-text { transition: opacity 0.2s, width 0.2s; opacity: 1; }

.level-group:nth-child(1) .level-btn { background: var(--color-sec); }
.level-group:nth-child(1) .level-btn:hover { background: var(--sidebar-purple-hover); transform: translateY(-2px); }
.level-group:nth-child(2) .level-btn { background: var(--color-mid); }
.level-group:nth-child(2) .level-btn:hover { background: var(--sidebar-orange-hover); transform: translateY(-2px); }
.level-group:nth-child(3) .level-btn { background: var(--color-pri); }
.level-group:nth-child(3) .level-btn:hover { background: var(--sidebar-green-hover); transform: translateY(-2px); }

/* --- PC COLLAPSED MODE FIX (PERFECT CENTERING) --- */
@media (min-width: 993px) {
  .levels-sidebar.pc-collapsed { width: 110px; } 
  
  .levels-sidebar.pc-collapsed .sidebar-card { padding: 15px 5px; }

  .levels-sidebar.pc-collapsed h4 { 
    font-size: 0.75rem; padding: 6px 4px; flex-direction: column; 
    gap: 4px; white-space: normal; line-height: 1.2; border-bottom-width: 2px;
    width: 90px; margin: 0 auto 15px auto;
  }
  
  .levels-sidebar.pc-collapsed .level-btn { 
    flex-direction: column; justify-content: center; align-items: center; 
    padding: 8px 4px; gap: 4px; width: 85px; margin: 0 auto 8px auto; 
    border-radius: 15px;
  }
  
  .levels-sidebar.pc-collapsed .btn-text { 
    display: block; font-size: 0.62rem; white-space: normal; 
    line-height: 1.1; text-align: center;
  }
  
  .levels-sidebar.pc-collapsed .level-btn i { font-size: 1.25rem; margin: 0; }
}

.pc-collapse-btn {
  position: absolute; top: 15px; left: -15px; width: 32px; height: 32px;
  background: var(--primary); color: white; border: none; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  box-shadow: 0 4px 10px rgba(0,0,0,0.15); cursor: pointer; z-index: 100; transition: 0.3s;
}

.pc-collapse-btn:hover { background: var(--primary-light); transform: scale(1.1); }
[dir="ltr"] .pc-collapse-btn { left: auto; right: -15px; }
.pc-collapse-btn i { transition: transform 0.3s; }
.levels-sidebar.pc-collapsed .pc-collapse-btn i { transform: rotate(180deg); }

/* --- 8. HERO & INDEX CONTENT --- */
.index-welcome {
  position: relative; overflow: hidden; color: #fff; text-align: center; 
  padding: 25px 20px; margin-bottom: 30px; border-radius: var(--radius-lg); box-shadow: var(--shadow);
  background: linear-gradient(
    var(--welcome-angle), var(--welcome-col1) 7%, var(--welcome-col2) 11%, 
    var(--welcome-col3) 22%, var(--welcome-col4) 34%, var(--welcome-col5) 46%, 
    var(--welcome-col6) 58%, var(--welcome-col7) 70%, var(--welcome-col8) 82%, var(--welcome-col9) 100%
  );
  background-size: var(--welcome-bg-size);
  animation: welcome-float var(--welcome-float-dur) ease-in-out infinite, welcome-gradient var(--welcome-gradient-dur) linear infinite;
}

.index-welcome::after { 
  content: ""; position: absolute; inset: -20%; z-index: 0; pointer-events: none; 
  background: radial-gradient(circle at 20% 30%, rgba(255,255,255,0.1), transparent 40%); 
  animation: welcome-blobs var(--welcome-blob-dur) infinite; 
}

.welcome-inner { position: relative; z-index: 2; }
.welcome-inner h2 { font-size: 1.8rem; margin-bottom: 8px; font-weight: 800; }

.stats-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(120px, 1fr)); gap: 12px; margin-top: 20px; }
.stat-card { background: rgba(255,255,255,0.15); padding: 12px; border-radius: 12px; backdrop-filter: blur(5px); }

.index-levels { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 20px; }
.level-card { background: var(--white); border-radius: var(--radius-lg); overflow: hidden; box-shadow: var(--shadow-sm); transition: 0.3s; }
.level-header { padding: 15px; color: #fff; text-align: center; font-weight: 800; font-size: 1.2rem; }

.card-secondary .level-header { background: linear-gradient(90deg, var(--color-sec), #7b1fa2); }
.card-middle .level-header { background: linear-gradient(90deg, var(--color-mid), #f57c00); }
.card-primary .level-header { background: linear-gradient(90deg, var(--color-pri), #388e3c); }

.level-links { padding: 15px; display: flex; flex-direction: column; gap: 8px; }
.level-link { display: flex; align-items: center; gap: 12px; padding: 12px 14px; background: var(--bg-light); border-radius: 10px; font-weight: 700; font-size: 1.08rem; border: 1px solid transparent; }
.link-icon { width: 34px; height: 34px; background: rgba(0,0,0,0.05); display: flex; align-items: center; justify-content: center; border-radius: 50%; font-weight: 800; font-size: 1.1rem; transition: 0.3s; }

/* --- 9. FOOTER --- */
.app-footer { background: var(--secondary); color: #fff; padding: 40px 5% 20px; margin-top: 50px; }
.footer-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 30px; max-width: 1400px; margin: 0 auto; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,0.1); padding-top: 15px; margin-top: 30px; text-align: center; color: #94a3b8; font-size: 0.85rem; }

/* --- 10. GLOBALS & OVERLAYS --- */
@keyframes welcome-gradient { 0%{background-position:0% 50%} 50%{background-position:100% 50%} 100%{background-position:0% 50%} }
@keyframes welcome-float { 0%{transform:translateY(-3px)} 50%{transform:translateY(3px)} 100%{transform:translateY(-3px)} }
@keyframes welcome-blobs { 0%, 100% { transform: scale(1); } 50% { transform: scale(1.1) translate(10px, 10px); } }

.sidebar-overlay { 
  position: fixed; inset: 0; background: rgba(0,0,0,0.5); 
  z-index: 1500; backdrop-filter: blur(5px); -webkit-backdrop-filter: blur(5px); 
  opacity: 0; visibility: hidden; transition: 0.3s; 
}
.sidebar-overlay.active { opacity: 1; visibility: visible; }
.mobile-sidebar-container.active .sidebar-overlay { opacity: 1; visibility: visible; }

/* --- 11. MOBILE MEDIA QUERIES (FIXED CENTERING) --- */
@media (max-width: 992px) {
  .desktop-nav { display: none; }
  .pc-collapse-btn { display: none; }
  .main-wrapper { flex-direction: column; align-items: stretch; margin-top: 20px; }
  
  .levels-sidebar { 
    position: fixed; top: 0; right: 0; width: 220px; height: 100%; 
    z-index: 2000; transform: translateX(100%); background: var(--bg-light); 
    padding: 15px; box-shadow: -5px 0 25px rgba(0,0,0,0.15); margin: 0 !important; overflow-y: auto; 
    display: flex; flex-direction: column; align-items: center; /* CENTERED */
  }
  [dir="ltr"] .levels-sidebar { right: auto; left: 0; transform: translateX(-100%); }
  .levels-sidebar.active { transform: translateX(0); }

  .mobile-sidebar-container { position: fixed; inset: 0; z-index: 2000; visibility: hidden; pointer-events: none; transition: visibility 0.3s; }
  .mobile-sidebar-container.active { visibility: visible; pointer-events: auto; }
  
  .mobile-sidebar { 
    position: absolute; top: 0; right: 0; width: 220px; 
    height: auto; max-height: 85vh; 
    background: var(--white); transform: translateX(100%); transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1); 
    display: flex; flex-direction: column; z-index: 1600; box-shadow: -5px 5px 25px rgba(0,0,0,0.15); 
    border-bottom-left-radius: 20px; overflow-y: auto; overflow-x: hidden;
    align-items: center; /* CENTERED */
  }
  [dir="ltr"] .mobile-sidebar { right: auto; left: 0; transform: translateX(-100%); border-bottom-right-radius: 20px; border-bottom-left-radius: 0; }
  .mobile-sidebar-container.active .mobile-sidebar { transform: translateX(0); }

  .schoolep-logo { width: 28px; height: 28px; margin-bottom: -6px; }
  .logo-text { font-size: 1.05rem; line-height: 1.2; margin-top: 2px; padding-bottom: 2px; }
  .mobile-sidebar .app-title:active { transform: scale(0.95); }

  /* MOBILE BUTTON ALIGNMENT */
  .mobile-acc-btn { 
    width: 90%; padding: 12px 14px; margin: 0 auto 8px auto; border-radius: 8px; 
    border: none; background: rgba(0, 0, 0, 0.04); font-weight: 800; 
    font-size: 1rem; 
    display: flex; flex-direction: column; /* STACKS VERTICALLY */
    justify-content: center; align-items: center; text-align: center;
    overflow: hidden; gap: 6px;
  }
  
  .mobile-acc-content a { 
    display: block; padding: 10px 25px; color: var(--text-main); 
    font-size: 0.82rem; /* SMALLER TEXT */
    font-weight: 700; border-bottom: 1px solid rgba(0,0,0,0.03); text-align: center; transition: background 0.2s; 
  }
  
  .sidebar-header { padding: 15px; border-bottom: 1px solid rgba(0,0,0,0.05); display: flex; justify-content: space-between; align-items: center; width: 100%; }
  .close-btn { width: 28px; height: 28px; border-radius: 50%; border: none; background: var(--bg-light); cursor: pointer; font-size: 1.6rem; display: flex; align-items: center; justify-content: center; }
  .sidebar-content { flex: 1; overflow-y: auto; padding: 15px; width: 100%; }
  .sidebar-card { padding: 15px; width: 100%; }
}

@media (min-width: 993px) { .mobile-sidebar-container, .mobile-btn { display: none !important; } }