/* =============================
   assets/styles.css
   Centralized Dark Cyberpunk Theme for Java Guide & DSA Tracker
   Green/Blue Accents | Mobile-Responsive | 2025 Edition
   ============================= */

/* Base Reset & Typography */
* { margin: 0; padding: 0; box-sizing: border-box; }
body { 
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  background: #000000; 
  min-height: 100vh; 
  color: #e0e0e0; 
  line-height: 1.6;
}

/* Layout & Containers */
.container {
  max-width: 1600px;
  margin: 0 auto;
  background: #0a0a0a;
  border-radius: 15px;
  box-shadow: 0 20px 60px rgba(0,0,0,0.9);
  overflow: hidden;
  border: 1px solid #1a1a1a;
}
.layout { display: flex; flex-direction: row; }
.header {
  background: linear-gradient(135deg, #1a1a1a 0%, #0d0d0d 100%);
  color: #00ff88;
  padding: 30px;
  text-align: center;
  border-bottom: 2px solid #00ff88;}
.header h1 { 
  font-size: 2.5em; 
  margin-bottom: 10px;
  text-shadow: 0 0 20px rgba(0, 255, 136, 0.5);
}
.header .subtitle { 
  font-size: 1.1em; 
  color: #a0a0a0;
}
.brand { display: flex; align-items: center; gap: 15px; justify-content: center; }
.logo { font-size: 2em; }
.top-actions { display: flex; gap: 10px; justify-content: center; margin-top: 20px; flex-wrap: wrap; }
.btn, .btn.ghost { 
  padding: 8px 16px; 
  border: 2px solid #00ff88; 
  border-radius: 6px; 
  text-decoration: none; 
  color: #00ff88; 
  font-weight: 600; 
  transition: all 0.3s;
  background: transparent;
}
.btn:hover, .btn.ghost:hover { 
  background: #00ff88; 
  color: #000; 
  transform: translateY(-2px);
  box-shadow: 0 5px 20px rgba(0, 255, 136, 0.4);
}

/* Sidebar - W3Schools Style: Always Visible, Fixed Left */
.sidebar-toggle { display: none; } /* Hide toggle since always visible */
.sidebar { 
  position: fixed;
  left: 0;
  top: 0;
  width: 280px;
  height: 100vh;
  background: #111111;
  padding: 20px 0;
  border-right: 1px solid #1a1a1a;
  overflow-y: auto;
  z-index: 1000;
  transform: none; /* Always visible, no transform */
}
.toc-title { 
  color: #00ff88; 
  margin: 0 20px 15px; 
  font-weight: bold; 
  text-shadow: 0 0 10px rgba(0,255,136,0.3); 
  font-size: 1.2em;
  padding-bottom: 10px;
  border-bottom: 1px solid #1a1a1a;
}
.search-container {
  margin: 0 20px 20px;
  position: relative;
}
#searchInput {
  width: 100%;
  padding: 10px 40px 10px 15px;
  background: #1a1a1a;
  border: 1px solid #00ff88;
  border-radius: 6px;
  color: #e0e0e0;
  font-size: 14px;
  transition: border-color 0.3s;
}
#searchInput:focus {
  outline: none;
  border-color: #00ccff;
  box-shadow: 0 0 5px rgba(0, 204, 255, 0.3);
}
#searchInput::placeholder { color: #808080; }
.toc { list-style: none; margin: 0; padding: 0; }
.toc li { margin: 0; }
.toc a { 
  color: #a0a0a0; 
  text-decoration: none; 
  display: block; 
  padding: 12px 20px; 
  border-left: 3px solid transparent;
  transition: all 0.3s;
  font-size: 14px;
}
.toc a:hover, .toc a.active { 
  color: #00ff88; 
  background: rgba(0, 255, 136, 0.1); 
  border-left-color: #00ff88;
}
.subtoc { 
  margin-left: 0; 
  font-size: 0.9em; 
  list-style: none; 
  background: rgba(0, 255, 136, 0.05);
  border-left: 1px solid #1a1a1a;
}
.subtoc a { padding-left: 30px; }
.sidebar-footer { 
  margin-top: auto; 
  padding: 20px; 
  color: #808080; 
  font-size: 12px; 
  border-top: 1px solid #1a1a1a;
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
}

/* Content Panels */
.content { 
  flex: 1; 
  padding: 20px; 
  overflow-y: auto; 
  background: #0a0a0a; 
  margin-left: 280px; /* Offset for fixed sidebar */
  min-height: 100vh;
}
.panel { 
  margin: 2rem 0; 
  padding: 1.5rem; 
  background: #111111; 
  border-radius: 12px; 
  border: 1px solid #1a1a1a; 
  box-shadow: 0 4px 12px rgba(0,0,0,0.5);
}
h2 { color: #00ff88; border-bottom: 2px solid #00ff88; padding-bottom: 8px; margin-bottom: 1rem; text-shadow: 0 0 10px rgba(0,255,136,0.3); }
h3 { color: #00ccff; margin-top: 1.8rem; text-shadow: 0 0 5px rgba(0,204,255,0.3); }
.muted { color: #a0a0a0; }
.bullets { list-style: none; }
.bullets li { margin: 0.5rem 0; padding-left: 1rem; position: relative; }
.bullets li:before { content: '•'; color: #00ff88; font-weight: bold; position: absolute; left: 0; }

/* Code Blocks */
.code { 
  background: #1a1a1a; 
  color: #e2e8f0; 
  padding: 1rem; 
  border-radius: 8px; 
  overflow-x: auto; 
  position: relative; 
  border: 1px solid #00ff88;
  font-family: 'Courier New', monospace;
  font-size: 14px;
}
.copy { 
  position: absolute; 
  top: 8px; 
  right: 8px; 
  background: #00ff88; 
  color: #000;
  border: none; 
  padding: 6px 10px; 
  border-radius: 4px; 
  cursor: pointer; 
  font-size: 12px;
  transition: all 0.3s;
}
.copy:hover { background: #00ccff; transform: scale(1.05); }

/* Tracker Specific Styles (Conditional for java.html) */
.info-box, .data-info, .heatmap-container, .stats, .progress-bar, .controls, .table-container, .footer {
  /* These are hidden or not used in guide; defined for tracker */
  display: none; /* Override in tracker pages via JS or specific class */
}

/* Modal */
.modal {
  display: none;
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(0,0,0,0.85);
  z-index: 2000;
  align-items: center;
  justify-content: center;
  padding: 20px;
}
.modal-inner {
  background: #1a1a1a;
  color: #e2e8f0;
  padding: 20px;
  border-radius: 12px;
  max-width: 90%;
  max-height: 90%;
  overflow: auto;
  position: relative;
  border: 1px solid #00ff88;
}
.modal-close {
  position: absolute;
  top: 10px; right: 15px;
  background: #ff4444;
  color: white;
  border: none;
  width: 36px; height: 36px;
  border-radius: 50%;
  font-size: 20px;
  cursor: pointer;
  transition: all 0.3s;
}
.modal-close:hover { background: #ef4444; transform: scale(1.1); }

/* Mobile Responsiveness - Sidebar Overlays on Mobile */
@media (max-width: 968px) {
  .sidebar {
    transform: translateX(-100%);
    transition: transform 0.3s ease;
  }
  .sidebar.open {
    transform: translateX(0);
  }
  .sidebar-toggle {
    display: block;
    position: fixed;
    top: 15px;
    left: 15px;
    z-index: 1001;
    background: #00ff88;
    color: #000;
    border: none;
    padding: 10px 14px;
    font-size: 18px;
    border-radius: 8px;
    cursor: pointer;
    box-shadow: 0 4px 12px rgba(0,255,136,0.3);
  }
  .content, .header {
    margin-left: 0 !important;
  }
  .content {
    padding: 10px;
  }
  .header {
    padding: 20px;
  }
  .panel {
    margin: 1rem 0;
    padding: 1rem;
  }
  /* Overlay backdrop for mobile sidebar */
  .sidebar-backdrop {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.5);
    z-index: 999;
  }
  .sidebar.open + .sidebar-backdrop {
    display: block;
  }
}

/* Tracker Overrides (for dsa.html/java-tracker.html if separate) */
body.tracker .content { display: none; }
body.tracker .container { display: block; margin-left: 0 !important; }
/* Add more as needed for tracker elements in CSS */
.footer {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  padding: 10px 20px;
  color:darkgoldenrod
}