/* Theme variables - default dark */
:root{
  color-scheme: dark;
  --bg:#0f1115;
  --panel:#151823;
  --panel-2:#1b2030;
  --text:#e6e8ef;
  --muted:#98a2b3;
  --brand:#7aa2ff;
  --accent:#00d4aa;
  --danger:#ff6b6b;
  --warning:#ffcc66;
  --border:#263048;
  --shadow:rgba(0,0,0,.5);
  --tab:#2a3248;
  --tab-active:#4a5470;
  --tab-active-border:#ff4757;
  --radius:8px;
  --radius-sm:4px;
  --transition:all .2s cubic-bezier(.4,0,.2,1);
  --shadow-sm:0 1px 2px 0 rgba(0,0,0,.05);
  --shadow-md:0 4px 6px -1px rgba(0,0,0,.1),0 2px 4px -1px rgba(0,0,0,.06);
  --shadow-lg:0 10px 15px -3px rgba(0,0,0,.1),0 4px 6px -2px rgba(0,0,0,.05);
  --gradient-brand:linear-gradient(135deg,var(--brand),var(--accent));
  --backdrop:rgba(15,17,21,.6);
}



/* Light theme override */
:root.theme-light{
  color-scheme: light;
  --bg:#f7f9fc;
  --panel:#ffffff;
  --panel-2:#f2f5fb;
  --text:#0b1420;
  --muted:#52677d;
  --brand:#0b72e7;
  --accent:#00a389;
  --danger:#c62828;
  --warning:#f59e0b;
  --border:#d6e0ea;
  --shadow:rgba(16,24,40,.12);
  --tab:#e8eef7;
  --tab-active:#ffffff;
  --tab-active-border:#dc2626;
  --gradient-brand:linear-gradient(135deg,var(--brand),#54a3ff);
  --backdrop:rgba(16,18,24,.4);
}
*{box-sizing:border-box;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}

/* Reduce motion for accessibility */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}
html,body{height:100%;margin:0;padding:0;background:var(--bg);color:var(--text);font:14px/1.4 system-ui,-apple-system,Segoe UI,Roboto,Ubuntu,Cantarell,"Helvetica Neue",Arial,"Noto Sans","Apple Color Emoji","Segoe UI Emoji"}
/* Menubar background should adapt with theme */
#menubar{display:flex;align-items:center;justify-content:space-between;padding:10px 12px;background:var(--panel);border-bottom:1px solid var(--border);position:sticky;top:0;z-index:10;transition:background-color .2s ease, color .2s ease, border-color .2s ease}
#brand{font-weight:700;letter-spacing:.2px;color:var(--brand);margin-right:24px}
#menubar-buttons{display:flex;align-items:center;gap:12px;width:100%}

/* Create left group for functional buttons */
#button-save, #button-savenew, #button-reload, #button-delete{
  order:1;
}

/* Create spacer to push right elements to the end */
#menubar-buttons::after{
  content:'';
  flex:1;
  order:2;
}

/* Right group - optional UI elements */
#theme-toggle, #status-indicator, #tab-color-picker{
  order:3;
}

/* Export button at the very end */
#button-export{
  order:4;
}

#menubar-buttons button, #button-export, .theme-toggle{appearance:none;border:1px solid var(--border);background:var(--panel);color:var(--text);padding:8px 16px;border-radius:8px;cursor:pointer;font-size:14px;font-weight:500;position:relative;overflow:hidden;box-shadow:var(--shadow-sm);transition:background-color .2s ease, color .2s ease, border-color .2s ease, filter .15s ease, transform .15s ease;height:36px;white-space:nowrap;display:inline-flex;align-items:center;justify-content:center;gap:8px}
#menubar-buttons button:hover, #button-export:hover, .theme-toggle:hover{background:var(--panel-2);transform:translateY(-1px);box-shadow:var(--shadow-md);border-color:var(--brand)}
#menubar-buttons button:active, #button-export:active, .theme-toggle:active{transform:translateY(0);box-shadow:var(--shadow-sm)}
#menubar-buttons button:disabled{opacity:.5;cursor:not-allowed;transform:none;box-shadow:var(--shadow-sm)}
#menubar-buttons button.primary{background:var(--gradient-brand);color:var(--text);border:1px solid var(--brand)}
#menubar-buttons button.primary:hover{filter:brightness(1.05)}
#menubar-buttons button.danger{background:var(--danger);color:#fff;border-color:var(--danger)}
#menubar-buttons button.danger:hover{filter:brightness(1.05)}
#main-content-outter{position:fixed;inset:100px 0 0 0;overflow:hidden}
/* These classes are applied via JS to obscure the UI when a dialog is open */
.app-masked{filter:blur(8px) saturate(0.9) brightness(0.9);opacity:.35;pointer-events:none;user-select:none}
.app-hidden{visibility:hidden;pointer-events:none}
.tabs{height:100%;display:flex;flex-direction:column}
.tab-headers{
  margin:0;
  padding:0;
  list-style:none;
  display:block; /* container for wrapping rows */
  background:var(--panel);
  border-bottom:2px solid var(--border);
  position:relative;
  /* height now auto based on rows; min height for first row */
  min-height:52px;
  box-shadow:0 2px 4px rgba(0,0,0,0.1);
  overflow:visible;
}
.tab-headers-container{
  display:flex;
  align-items:flex-start;
  flex-wrap:wrap;             /* allow multi-row wrapping */
  gap:8px 10px;               /* row and column gaps */
  padding:6px 48px 8px 12px;  /* leave space for + button on the right */
  max-height:none;
  overflow:visible;           /* no horizontal scroll; we wrap */
}
.tab-headers-container::-webkit-scrollbar{display:none}

.tab-header{
  display:flex;
  align-items:center;
  gap:6px;
  padding:8px 10px;
  border-radius:var(--radius) var(--radius) 0 0;
  background:var(--tab);
  border:2px solid var(--border);
  border-bottom:2px solid var(--border);
  max-width:180px;            /* slightly narrower to fit more */
  width:fit-content;
  min-width:56px;
  overflow:hidden;
  user-select:none;
  transition:all 0.2s ease;
  position:relative;
  flex:0 1 auto;              /* allow shrinking, keep content sized */
  z-index:2;
  white-space:nowrap;
  box-shadow:0 2px 4px rgba(0,0,0,0.05)
}
.tab-header:hover{background:var(--tab-active);transform:translateY(-2px);box-shadow:0 4px 8px rgba(0,0,0,0.15);border-color:var(--brand)}
.tab-header.active:hover{border-color:var(--tab-active-border)}
.tab-header.active{background:var(--tab-active);box-shadow:0 8px 0 0 var(--tab-active),0 -4px 12px rgba(0,0,0,0.2);transform:translateY(-2px);z-index:3;border:2px solid var(--tab-active-border);border-bottom:2px solid var(--tab-active-border);font-weight:700}
.tab-title{
  overflow:hidden;
  text-overflow:ellipsis;
  white-space:nowrap;
  text-decoration:none;
  color:var(--text);
  font-weight:600;
  letter-spacing:.1px;
  display:inline-block;
  max-width:140px; /* ensure truncation inside smaller tab */
}
.tab-header.modified .tab-title::after{content:'•';color:var(--accent);margin-left:4px;font-size:18px}
.tab-header .close{color:var(--muted);cursor:pointer;font-weight:700;padding:1px 3px;border-radius:var(--radius-sm);flex-shrink:0;opacity:0.3;transition:opacity 0.2s ease;font-size:12px}
.tab-header:hover .close{opacity:1}
.tab-header .close:hover{color:white;background:var(--danger)}

/* Colored tab styling */
.tab-header[data-tab-color] {
  border-color: rgba(0,0,0,0.2);
}

.tab-header[data-tab-color].active {
  border-color: var(--tab-active-border);
  border-bottom: 2px solid var(--tab-active-border);
}

.tab-header[data-tab-color] .tab-title {
  color: rgba(0,0,0,0.8);
}

.tab-header[data-tab-color].active .tab-title {
  color: rgba(0,0,0,0.9);
  font-weight: 700;
}

.tab-header[data-tab-color] .close {
  color: rgba(0,0,0,0.6);
}

.tab-header[data-tab-color] .close:hover {
  color: white;
  background: var(--danger);
}

#tab-color-picker {
  width: 24px;
  height: 24px;
  border: 1px solid var(--border);
  border-radius: 4px;
  cursor: pointer;
  background: none;
  padding: 0;
  margin: 0 4px;
  transition: border-color 0.2s ease, transform 0.15s ease;
}

#tab-color-picker:hover {
  border-color: var(--brand);
  transform: translateY(-1px);
}

#tab-color-picker:active {
  transform: translateY(0);
}
.tab-header[draggable="true"]{cursor:move}
.tab-header[draggable="true"]:hover{cursor:grab}
.tab-header[draggable="true"]:active{cursor:grabbing}
.tab-header.dragging{opacity:0.5;transform:rotate(2deg)}
.tab-headers-container{position:relative}
.tab-headers-container .drag-placeholder{background:var(--accent);opacity:0.3;height:2px;position:absolute;top:0;left:0;right:0;z-index:1000;transition:all 0.2s ease}
.add-tab{
  width:28px;height:28px;border-radius:var(--radius);border:1px solid var(--border);
  background:var(--panel-2);color:var(--text);cursor:pointer;transition:var(--transition);
  flex-shrink:0;margin:0 10px 8px 8px;position:absolute;top:10px;right:10px;z-index:10
}
.add-tab:hover{filter:brightness(1.1);transform:scale(1.1);background:var(--tab)}

/* Tab panels should account for variable header height */
.tab-panel{
  display:none;
  height:calc(100% - 8px);
  margin-top:8px;
  border-radius:var(--radius);
  background:var(--bg);
  box-shadow:0 2px 8px rgba(0,0,0,0.1);
  border:1px solid var(--border)
}
.tab-panel.active{display:block}

/* Editor with line number gutter */
.editor-wrap{
  position:relative;
  height:100%;
  display:flex;
  background:var(--bg);
  border-radius:var(--radius);
  box-shadow:inset 0 1px 3px rgba(0,0,0,.08);
  overflow:hidden; /* ensure pseudo element can render beyond without layout spill */
  contain: content; /* stronger containment to isolate heavy textareas */
  margin:4px;
  will-change: transform;
  position: relative;
}

/* Active line highlighting */
.editor-wrap .active-line {
  position: absolute;
  left: 0;
  right: 0;
  background-color: rgba(122, 162, 255, 0.15); /* Subtle blue highlight */
  pointer-events: none;
  z-index: 0;
}

/* Selected lines highlighting */
.editor-wrap .selected-line {
  position: absolute;
  left: 0;
  right: 0;
  background-color: rgba(122, 162, 255, 0.25); /* Slightly more prominent highlight */
  pointer-events: none;
  z-index: 0;
}

/* Typography and rhythm sync for editor and gutter */
:root{
  --editor-font-family: ui-monospace,SFMono-Regular,Menlo,Consolas,"Liberation Mono",monospace;
  --editor-font-size: 14px;
  --editor-line-height: 1.6; /* unitless preferred for consistent layout */
  --editor-pad-top: 20px;
  --editor-pad-right: 20px;
  --editor-pad-bottom: 20px;
  --editor-pad-left: 12px;
  --gutter-width: 52px;
  --gutter-pad-right: 8px;
  --gutter-pad-left: 6px;
}

/* Fixed gutter */
.line-gutter{
  width:var(--gutter-width);
  flex:0 0 var(--gutter-width);
  background:var(--panel);
  border-right:1px solid var(--border);
  color:var(--muted);
  text-align:right;
  padding:var(--editor-pad-top) var(--gutter-pad-right) var(--editor-pad-bottom) var(--gutter-pad-left);
  font-family:var(--editor-font-family);
  font-size:var(--editor-font-size);
  line-height:var(--editor-line-height);
  user-select:none;
  overflow:visible; /* allow full number text to render */
  position:relative;
  contain: content; /* isolate heavy number painting */
  will-change: transform;
  z-index: 2;
}

/* Use a pseudo element to paint numbers in a single layer for perf
   It will be transformed on scroll for smooth sync without layout thrash */
.line-gutter::before{
  content: attr(data-lines);
  white-space:pre;
  position:absolute;
  top:var(--editor-pad-top);
  right:var(--gutter-pad-right);
  color:inherit;
  will-change: transform;
  transform: var(--gutter-before-transform, translateY(0)); /* synced via JS */
}

/* Textarea sits to the right and scrolls normally */
.textarea-contents{
  width:100%;
  height:100%;
  resize:none;
  border:none;
  outline:none;
  background:transparent;
  color:var(--text);
  padding:var(--editor-pad-top) var(--editor-pad-right) var(--editor-pad-bottom) var(--editor-pad-left); /* left padding smaller; gutter provides left margin */
  font-family:var(--editor-font-family);
  font-size:var(--editor-font-size);
  line-height:var(--editor-line-height);
  caret-color:var(--accent);
  transition:var(--transition);
  border-radius:0 0 var(--radius) var(--radius);
  overflow: auto; /* ensure scrollbars appear as needed */
  contain: content; /* prevent large text layout from bubbling up on tab switch */
  will-change: contents;
  position: relative;
  z-index: 2;
}
.textarea-contents:focus{background:var(--panel-2);box-shadow:inset 0 1px 3px rgba(0,0,0,.12),0 0 0 2px var(--brand)}
.textarea-contents::placeholder{color:var(--muted);opacity:.7;font-style:italic}
.textarea-contents::selection {
  background: #e6c87c; /* Muted yellow */
  color: #000000;
}

/* Keep line-height of gutter and textarea identical for alignment */
.editor-wrap .textarea-contents,
.editor-wrap .line-gutter{line-height:var(--editor-line-height)}

/* Ensure the gutter pseudo element spans beyond the visible area to avoid clipping at bottom */
.editor-wrap .line-gutter{min-height:100%}
#outer-toast{position:fixed;left:50%;bottom:18px;transform:translateX(-50%);z-index:2147483647;isolation:isolate;contain:paint}
#toast{background:var(--panel);border:1px solid var(--border);padding:10px 14px;border-radius:10px;box-shadow:0 10px 24px var(--shadow);color:var(--text);min-width:140px;text-align:center;transition:background-color .2s ease, color .2s ease, border-color .2s ease}
.loader{position:fixed;inset:0;background:rgba(0,0,0,.25);display:flex;align-items:center;justify-content:center;z-index:999}
.spinner{width:36px;height:36px;border-radius:50%;border:3px solid #2b3550;border-top-color:var(--accent)}
.app-obscure-overlay{position:fixed;inset:0;background:var(--backdrop);z-index:2147483580;pointer-events:none;opacity:1;transition:opacity .15s ease}
.app-obscure-overlay.hidden{opacity:0;display:none}
/* Keep dialog high, but below toast */
.app-dialog{border:none;border-radius:12px;padding:0;background:var(--panel);color:var(--text);box-shadow:var(--shadow-lg);width:min(420px,calc(100% - 32px));position:relative;overflow:hidden;z-index:2147483600;transition:background-color .2s ease, color .2s ease, border-color .2s ease, box-shadow .2s ease}
.app-dialog::backdrop{background:rgba(0,0,0,0)!important;backdrop-filter:none!important;z-index:2147483590}
html.password-mode #menubar,
html.password-mode #main-content-outter,
html.password-mode .tabs{ /* defensive */
  /* Using blur+opacity for privacy while keeping structure for layout stability */
}
html.password-mode #menubar,
html.password-mode #main-content-outter{ /* classes toggled from JS for stronger control too */
  /* no direct rules here; JS applies .app-masked or .app-hidden to these nodes */
}
.app-dialog::before{content:'';position:absolute;top:0;left:0;right:0;height:4px;background:var(--gradient-brand)}
.app-dialog form{padding:32px}
.app-dialog h3{margin:0 0 20px 0;font-size:20px;font-weight:600;letter-spacing:-.025em}
.app-dialog .additional-text{color:var(--muted);margin:0 0 20px 0;opacity:.9}
.app-dialog input[type="password"]{width:100%;padding:14px 16px;border:2px solid var(--border);border-radius:var(--radius);background:var(--bg);color:var(--text);margin-bottom:20px;transition:background-color .2s ease, color .2s ease, border-color .2s ease; font-family:inherit}
.app-dialog input[type="password"]:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 3px rgba(122,162,255,.15);background:rgba(26,32,44,.8)}
.app-dialog input[type="password"]::placeholder{color:var(--muted);opacity:.8}
.app-dialog menu{display:flex;gap:12px;justify-content:center;margin:24px 0 0 0;padding:0}
.app-dialog button{appearance:none;border:1px solid var(--border);background:var(--panel-2);color:var(--text);padding:12px 20px;border-radius:var(--radius);cursor:pointer;font-size:14px;font-weight:600;transition:var(--transition);position:relative;overflow:hidden}
.app-dialog button:hover{transform:translateY(-1px)}
.app-dialog .primary{background:var(--gradient-brand);border-color:var(--brand);color:white;box-shadow:var(--shadow-sm)}
.app-dialog .primary:hover{background:var(--brand);box-shadow:var(--shadow-md)}
.app-dialog .danger{background:var(--danger);border-color:var(--danger);color:white}
.app-dialog .danger:hover{background:#ff5252;border-color:#ff5252}
.app-dialog .secondary{opacity:.85}
.app-dialog .secondary:hover{background:var(--border)}
.hint.error{color:#ffb3b3;font-size:12px}
/* Ensure toasts render above dialogs and any overlays */
.toast-container{position:fixed;top:20px;right:20px;z-index:2147483647;display:flex;flex-direction:column;gap:12px;pointer-events:none;isolation:isolate;contain:paint}
.toast{background:var(--panel);color:var(--text);padding:16px 20px;border-radius:var(--radius);box-shadow:0 10px 24px var(--shadow);border-left:4px solid var(--brand);min-width:300px;max-width:400px;pointer-events:auto;position:relative;overflow:hidden;z-index:2147483647;transition:background-color .2s ease, color .2s ease, border-color .2s ease}
.toast.success{border-left-color:var(--accent)}
.toast.error{border-left-color:var(--danger)}
.toast.warning{border-left-color:var(--warning)}
.toast-content{display:flex;align-items:center;gap:12px}
.toast-icon{font-size:18px;flex-shrink:0}
.toast-message{flex:1;font-size:14px;line-height:1.4}
.toast-close{background:none;border:none;color:var(--muted);cursor:pointer;padding:4px;border-radius:var(--radius-sm);margin-left:8px}
.toast-close:hover{background:var(--panel-2);color:var(--text)}
.loading-overlay{position:fixed;top:0;left:0;right:0;bottom:0;background:var(--backdrop);display:flex;align-items:center;justify-content:center;z-index:999;backdrop-filter:blur(0)}
.loading-spinner{width:40px;height:40px;border:3px solid var(--border);border-top:3px solid var(--brand);border-radius:50%}
/* Light theme specific readability tweaks */

:root.theme-light .tab-header .close{color:#6b7280}
:root.theme-light .tab-header .close:hover{color:#ffffff;background:#ef4444}
:root.theme-light .status-indicator{background:var(--panel);color:var(--text);border:1px solid var(--border)}
.shortcuts-grid{display:grid;gap:12px;margin:16px 0;max-height:400px;overflow-y:auto}
.shortcut-item{display:flex;justify-content:space-between;align-items:center;padding:8px 12px;background:var(--bg);border-radius:var(--radius-sm);border:1px solid var(--border);transition:background-color .2s ease, color .2s ease, border-color .2s ease}
.shortcut-item kbd{background:var(--panel);border:1px solid var(--border);border-radius:4px;padding:4px 8px;font-family:'Courier New',monospace;font-size:.85em;font-weight:600;color:var(--accent);box-shadow:0 1px 2px rgba(0,0,0,.1);min-width:120px;text-align:center;transition:background-color .2s ease, color .2s ease, border-color .2s ease}
.shortcut-item span{color:var(--muted);font-size:.9em}
.status-indicator{display:flex;align-items:center;gap:6px;padding:6px 12px;background:var(--panel);border-radius:var(--radius-sm);border:1px solid var(--border);font-size:.85em;margin-left:12px;transition:background-color .2s ease, color .2s ease, border-color .2s ease}
.status-dot{width:8px;height:8px;border-radius:50%;background:var(--accent);transition:background-color .2s ease}
.status-indicator.saving .status-dot{background:var(--warning)}
.status-indicator.error .status-dot{background:var(--danger)}
.status-indicator.modified .status-dot{background:var(--accent)}
.last-saved{font-size:.75em;color:var(--muted);margin-left:8px;opacity:0.8}

.hidden{display:none!important}
.loading{opacity:.5;pointer-events:none}
.error{color:var(--danger)!important}
.success{color:var(--accent)!important}
.warning{color:var(--warning)!important}
.fade-in{opacity:1}
.fade-out{opacity:0}

/* Notification System */
.notification {
  position: fixed;
  top: 20px;
  right: 20px;
  padding: 12px 16px;
  border-radius: var(--radius);
  color: white;
  font-weight: 500;
  z-index: 10000;
  transform: translateX(100%);
  transition: transform 0.3s ease;
  max-width: 400px;
  word-wrap: break-word;
  box-shadow: var(--shadow-lg);
}

.notification.show {
  transform: translateX(0);
}

.notification-info {
  background: var(--brand);
}

.notification-success {
  background: var(--accent);
}

.notification-error {
  background: var(--danger);
}

.notification-warning {
  background: var(--warning);
  color: var(--bg);
}

/* Responsive design */
@media (max-width: 720px){
  .notification {
    top: 10px;
    right: 10px;
    left: 10px;
    max-width: none;
  }
}

@media (max-width: 460px){
  #brand{display:none}
}

.form-group{display:flex;flex-direction:column;gap:4px}
.form-group label{font-weight:500;color:var(--text);font-size:.9em}
.form-group input[type="text"]{padding:8px 12px;border:1px solid var(--border);border-radius:var(--radius-sm);background:var(--bg);color:var(--text);font-size:.9em;transition:var(--transition)}
.form-group input[type="text"]:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 2px rgba(122,162,255,.15)}
.search-options{display:flex;gap:16px;flex-wrap:wrap}
.search-options label{display:flex;align-items:center;gap:6px;font-size:.9em;cursor:pointer}
.search-options input[type="checkbox"]{margin:0}
.search-results{padding:8px 12px;background:var(--panel);border-radius:var(--radius-sm);border:1px solid var(--border);font-size:.85em;color:var(--muted);text-align:center}