:root{
  --bg:#0b0f14;
  --panel:#0f1622;
  --panel2:#101a29;
  --text:#e7eef8;
  --muted:#a8b3c7;
  --border:rgba(255,255,255,.08);
  --accent:#4ea1ff;
  --danger:#ff5a5f;
  --shadow:0 12px 30px rgba(0,0,0,.35);
  --mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
  --sans: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji","Segoe UI Emoji";
}
*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;
  font-family:var(--sans);
  color:var(--text);
  background:linear-gradient(180deg, var(--bg), #070a0f);
}
a{color:inherit}
code, pre{font-family:var(--mono)}

/* Main Layout */
.app{
  height:100%;
  display:grid;
  grid-template-columns: 340px 1fr; /* Default open state */
  grid-template-rows: 64px 1fr;
  grid-template-areas:
    "topbar topbar"
    "sidebar content";
  /* Smooth animation for toggling sidebar width */
  transition: grid-template-columns 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Desktop Collapsed State (added via JS) */
.app.sidebar-collapsed {
  grid-template-columns: 0px 1fr;
}

.topbar{
  grid-area:topbar;
  display:flex;
  align-items:center;
  justify-content:space-between;
  padding:0 16px;
  border-bottom:1px solid var(--border);
  background:rgba(10,14,20,.75);
  backdrop-filter: blur(10px);
}
.brand{display:flex; align-items:center}
.brand-title{font-weight:700; letter-spacing:.2px}
.brand-name{display:inline}
.brand-subtitle{font-size:12px; color:var(--muted); margin-top:2px}
.topbar-actions{display:flex; align-items:center; gap:10px; min-width: 520px; justify-content:flex-end}
.search{position:relative; flex: 1; max-width: 520px}
.search input{
  width:100%;
  padding:10px 12px;
  border-radius:12px;
  border:1px solid var(--border);
  background:rgba(255,255,255,.04);
  color:var(--text);
  outline:none;
}
.search input:focus{border-color: rgba(78,161,255,.6); box-shadow: 0 0 0 4px rgba(78,161,255,.12)}
.search-results{
  position:absolute;
  top:44px;
  left:0;
  right:0;
  background: var(--panel);
  border:1px solid var(--border);
  border-radius: 14px;
  box-shadow: var(--shadow);
  max-height: 380px;
  overflow:auto;
  display:none;
  z-index: 20;
}
.search-results .item{
  padding:10px 12px;
  border-bottom:1px solid var(--border);
  cursor:pointer;
}
.search-results .item:last-child{border-bottom:none}
.search-results .item:hover{background: rgba(255,255,255,.04)}
.search-results .path{font-family: var(--mono); font-size:12px; color:var(--muted)}
.search-results .name{font-size:13px}

.btn{
  display:inline-flex; /* Always visible now */
  align-items:center;
  justify-content:center;
  padding:10px 12px;
  border-radius: 12px;
  border:1px solid var(--border);
  background: rgba(78,161,255,.16);
  color: var(--text);
  text-decoration:none;
  cursor:pointer;
  user-select:none;
}
.btn:hover{background: rgba(78,161,255,.22)}
.btn.secondary{background: rgba(255,255,255,.04)}
.btn.secondary:hover{background: rgba(255,255,255,.07)}
#repoBtn{
  padding:3px 3px;
}
.sidebar{
  grid-area:sidebar;
  border-right:1px solid var(--border);
  background: rgba(15,22,34,.7);
  backdrop-filter: blur(8px);
  display:flex;
  flex-direction:column;
  min-width: 0;
  overflow: hidden; /* Important for clean collapse animation */
  
  /* Transition for both desktop collapse and mobile slide */
  transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1), opacity 0.2s;
  opacity: 1;
}

/* When collapsed on Desktop, hide content */
.app.sidebar-collapsed .sidebar {
  opacity: 0;
  pointer-events: none;
  transform: translateX(-20px); /* Slight slide effect */
}

.sidebar-header{
  display:flex;
  align-items:center;
  justify-content:space-between;
  padding:14px 16px;
  border-bottom:1px solid var(--border);
  min-width: 339px; /* Prevent header squishing during animation */
}
.sidebar-title{font-weight:700}
.sidebar-meta{display:flex; align-items:center; gap:8px}
.pill{
  font-size:12px;
  padding:4px 10px;
  border-radius: 999px;
  background: rgba(255,255,255,.06);
  border: 1px solid var(--border);
  color: var(--muted);
}
.pill.ok{color:#b9f6ca; border-color: rgba(185,246,202,.18); background: rgba(185,246,202,.08)}
.pill.warn{color:#ffe082; border-color: rgba(255,224,130,.18); background: rgba(255,224,130,.08)}
.pill.bad{color:#ff8a80; border-color: rgba(255,138,128,.18); background: rgba(255,138,128,.08)}

.tree{
  padding: 10px 10px 18px 10px;
  overflow:auto;
  flex:1;
  min-width: 339px; /* Prevent content squishing */
}
.node{
  display:flex;
  align-items:center;
  gap:8px;
  padding:8px 10px;
  border-radius: 10px;
  cursor:pointer;
  user-select:none;
}
.node:hover{background: rgba(255,255,255,.04)}
.node.active{background: rgba(78,161,255,.16); border:1px solid rgba(78,161,255,.24)}
.node .icon{
  width:18px; height:18px; opacity:.85; display:inline-flex; align-items:center; justify-content:center;
}
.node .label{
  font-size:13px;
  overflow:hidden;
  text-overflow:ellipsis;
  white-space:nowrap;
}
.node .badge{
  margin-left:auto;
  font-size:11px;
  color: var(--muted);
  font-family: var(--mono);
}
.children{margin-left: 18px; display:none}
.children.open{display:block}
.sidebar-footer{
  padding: 12px 16px;
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size:12px;
  min-width: 339px;
}
.sidebar-footer .hint{margin-top:6px}
.sidebar-footer code{
  background: rgba(255,255,255,.06);
  padding:2px 6px;
  border-radius:8px;
  border:1px solid var(--border);
}
.content{
  grid-area:content;
  display:flex;
  flex-direction:column;
  min-width:0;
}
.content-header{
  display:flex;
  align-items:center;
  justify-content:space-between;
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
  background: rgba(16,26,41,.55);
  backdrop-filter: blur(8px);
  gap:12px;
}
.breadcrumbs{
  min-width:0;
  overflow:hidden;
  text-overflow:ellipsis;
  white-space:nowrap;
  color: var(--muted);
  font-family: var(--mono);
  font-size:12px;
}
.viewer{
  padding: 18px 22px 32px 22px;
  overflow:auto;
  flex:1;
  max-width: 1100px;
}
.footer{
  padding: 10px 16px;
  color: var(--muted);
  font-size:12px;
  border-top: 1px solid var(--border);
  background: rgba(10,14,20,.6);
}
.empty h1{margin:0 0 8px 0}
.empty p{margin:8px 0; color: var(--muted)}
.small{font-size:12px}

.viewer h1,.viewer h2,.viewer h3{scroll-margin-top: 90px}
.viewer h1{font-size:32px; margin: 12px 0}
.viewer h2{font-size:22px; margin: 18px 0 10px 0}
.viewer h3{font-size:18px; margin: 16px 0 8px 0}
.viewer p{line-height:1.6; color: var(--text)}
.viewer a{color: var(--accent); text-decoration:none}
.viewer a:hover{text-decoration:underline}
.viewer blockquote{
  margin: 12px 0;
  padding: 10px 12px;
  border-left: 3px solid rgba(78,161,255,.55);
  background: rgba(78,161,255,.06);
  border-radius: 10px;
  color: var(--muted);
}
.viewer pre{
  background: rgba(255,255,255,.04);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 12px;
  overflow:auto;
}
.viewer code{
  background: rgba(255,255,255,.06);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1px 6px;
}
.viewer pre code{
  background: transparent;
  border: none;
  padding: 0;
}
.viewer table{
  width: 100%;
  border-collapse: collapse;
  margin: 10px 0;
  font-size: 13px;
}
.viewer th,.viewer td{
  border: 1px solid var(--border);
  padding: 8px 10px;
  vertical-align: top;
}
.viewer th{
  background: rgba(255,255,255,.04);
  text-align:left;
  color: var(--muted);
}
.file-meta{
  display:flex; gap:10px; flex-wrap:wrap;
  margin: 10px 0 16px 0;
  color: var(--muted);
  font-size: 12px;
}
.file-meta .chip{
  padding: 4px 10px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: rgba(255,255,255,.04);
}
.notice{
  border: 1px solid rgba(255,224,130,.2);
  background: rgba(255,224,130,.07);
  border-radius: 14px;
  padding: 12px 14px;
  color: var(--muted);
}
.notice strong{color: var(--text)}
.viewer img{
  max-width: 100%;
  border-radius: 16px;
  border: 1px solid var(--border);
  margin: 10px 0;
}
.iframe-wrap{
  height: calc(100vh - 160px);
  border: 1px solid var(--border);
  border-radius: 16px;
  overflow:hidden;
  background: rgba(0,0,0,.2);
}
.iframe-wrap iframe{width:100%; height:100%; border:0}

/* Mobile Overlay */
.mobile-overlay {
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(0,0,0,0.5);
  backdrop-filter: blur(2px);
  z-index: 99;
  display: none;
  opacity: 0;
  transition: opacity 0.3s;
}
.mobile-overlay.open {
  display: block;
  opacity: 1;
}

@media (max-width: 999px){
  .brand-name{display:block}
}

/* Mobile Layout overrides */
@media (max-width: 980px){
  .app{
    /* Force simple single-column grid on mobile */
    /* This overrides the .sidebar-collapsed rule if it exists */
    grid-template-columns: 1fr !important;
    grid-template-rows: 64px 1fr;
    grid-template-areas:
      "topbar"
      "content";
  }
  
  /* Sidebar becomes an off-canvas drawer */
  .sidebar {
    display: flex;
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    width: 280px;
    z-index: 100;
    /* Default hidden on mobile */
    transform: translateX(-100%) !important; 
    opacity: 1 !important; /* Ensure visibility when opening */
    pointer-events: auto !important;
    box-shadow: 4px 0 24px rgba(0,0,0,0.5);
  }

  /* "Open" state for mobile */
  .sidebar.open {
    transform: translateX(0) !important;
  }

  .topbar-actions{min-width: 0}
  .viewer{padding: 14px 14px 80px 14px}
}