:root {
  --bg: #ffffff;
  --fg: #111111;
  --border: #e0e0e0;
  --accent: #007bff;
  --header-bg: #ffffff;
  --input-bg: transparent;
  --input-hover: #f8f9fa;
  --active-line: rgba(0, 0, 0, 0.03);
  --selection: rgba(0, 123, 255, 0.15); /* Soft Blue */
  --font-ui: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #292d3e; 
    --fg: #d0d0d0;
    --border: #3b4054;
    --accent: #82aaff;
    --header-bg: #292d3e;
    --input-bg: rgba(255,255,255,0.03);
    --input-hover: rgba(255,255,255,0.08);
    --active-line: rgba(255, 255, 255, 0.04);
    --selection: rgba(137, 180, 250, 0.3); /* Soft Lavender Blue */
  }
}

* { box-sizing: border-box; }
::selection { background: var(--selection); }

/* Custom Scrollbar */
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: rgba(128,128,128,0.2); border-radius: 10px; border: 3px solid var(--bg); }
::-webkit-scrollbar-thumb:hover { background: rgba(128,128,128,0.4); }

body { 
  margin: 0; 
  background: var(--bg); 
  color: var(--fg); 
  font-family: var(--font-ui); 
  height: 100vh; 
  display: flex; 
  flex-direction: column; 
  overflow: hidden; 
  transition: background 0.3s cubic-bezier(0.4, 0, 0.2, 1), color 0.3s; 
}

header {
  padding: 0 2rem;
  border-bottom: 1px solid var(--border);
  background: var(--header-bg);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-shrink: 0;
  height: 64px;
  user-select: none;
  z-index: 100;
}

.brand { 
  font-weight: 700; 
  font-size: 1.15rem; 
  letter-spacing: -0.6px; 
  text-decoration: none; 
  color: var(--fg); 
  display: flex; 
  align-items: center; 
  gap: 0.6rem;
  transition: opacity 0.2s;
}
.brand:hover { opacity: 0.8; }
.brand i { font-size: 1.1rem; color: var(--accent); }

.meta { font-size: 0.8rem; color: #7f849c; display: flex; align-items: center; gap: 1.2rem; }
.divider { color: var(--border); margin: 0 0.5rem; opacity: 0.8; }

/* Language Input Refinement */
.lang-select-wrapper {
    position: relative;
    display: inline-flex;
    align-items: center;
}

.lang-input {
    appearance: none;
    -webkit-appearance: none;
    background: var(--input-bg);
    border: 1px solid transparent; 
    font-family: var(--font-ui);
    font-size: 0.82rem;
    color: var(--fg);
    padding: 0.45rem 2rem 0.45rem 0.75rem; 
    border-radius: 6px;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    outline: none;
    font-weight: 500;
    width: 160px;
}

.lang-input:hover { background: var(--input-hover); }
.lang-input:focus { 
    background: var(--bg);
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(137, 180, 250, 0.2);
    width: 200px;
}

.input-icon {
    position: absolute;
    right: 0.75rem;
    color: #6c7086;
    font-size: 0.75rem;
    pointer-events: none;
}

main { flex: 1; display: flex; flex-direction: column; position: relative; overflow: hidden; }

/* Editor / Viewer Container */
#editor-wrapper, #viewer-container {
  flex: 1;
  width: 100%;
  height: 100%;
  overflow: hidden; /* CM handles scroll */
  position: relative;
  background: var(--bg);
  cursor: text; /* Show text cursor in the whole editor area */
}

#editor-container {
    height: 100%;
    width: 100%;
}

/* CodeMirror Specifics */
.CodeMirror {
    height: 100% !important;
    font-family: var(--font-mono) !important;
    font-size: 14px;
    line-height: 1.6;
    background: transparent;
    color: var(--fg);
}
.CodeMirror-gutters { 
    background: var(--bg); 
    border-right: 1px solid var(--border);
    width: 3.5rem; /* Wider Gutter */
}
.CodeMirror-linenumber { 
    color: #6c7086; 
    padding-left: 1rem !important; /* Move numbers right */
}
.CodeMirror-activeline-background { background: var(--active-line) !important; }
.CodeMirror-cursor { border-left-color: var(--fg); }
.CodeMirror-selected { background: var(--selection) !important; }
.CodeMirror-selectedtext { background: none; }

/* Prism Overrides for Consistency */
pre[class*="language-"] {
    font-family: var(--font-mono) !important;
    font-size: 14px !important;
    line-height: 1.6 !important;
    text-shadow: none !important;
    border-radius: 0 !important;
    margin: 0 !important;
    background: transparent !important;
    padding: 1rem !important; /* Padding only on PRE */
    height: auto !important;
    min-height: 100%;
    box-sizing: border-box; 
    color: var(--fg);
    position: relative;
}

/* Ensure code acts as block for full height calculation */
code[class*="language-"] {
    font-family: var(--font-mono) !important;
    font-size: 14px !important;
    line-height: 1.6 !important;
    text-shadow: none !important;
    background: transparent !important;
    padding: 0 !important; /* NO padding on CODE */
    display: block; 
}

/* Prism Selection Style */
code[class*="language-"]::selection, code[class*="language-"] *::selection { background: var(--selection); }
pre[class*="language-"]::selection, pre[class*="language-"] *::selection { background: var(--selection); }

/* Line numbers adjustments */
pre[class*="language-"].line-numbers {
    padding-left: 4.5rem !important; /* Total left space */
}

.line-numbers .line-numbers-rows {
    position: absolute;
    top: 0;
    left: -4.5rem !important; /* Pull back to the left edge of PRE */
    width: 3.5rem !important; /* Width of the number column */
    border-right: 1px solid #ddd !important; /* High contrast for light mode */
    padding-top: 0 !important; /* Remove incorrect padding */
    height: 100%; /* Ensure full height */
    background: var(--bg); /* Optional: distinct bg for gutter */
    pointer-events: none;
}

@media (prefers-color-scheme: dark) {
    .line-numbers .line-numbers-rows {
        border-right-color: #4a5068 !important; /* High contrast for dark mode */
    }
}

/* Adjust inner spans to align vertically */
.line-numbers-rows > span {
    display: block;
    counter-increment: linenumber;
}

/* Copy Code Button */
.copy-code-btn {
    position: absolute;
    top: 1rem;
    right: 1rem;
    z-index: 50;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 0.4rem 0.8rem;
    font-size: 0.8rem;
    color: var(--fg);
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.4rem;
    transition: all 0.2s;
    box-shadow: 0 2px 5px rgba(0,0,0,0.05);
}

.copy-code-btn:hover {
    background: var(--input-hover);
    border-color: #999;
}

/* Controls */
.controls {
  position: absolute;
  bottom: 2rem;
  right: 2rem;
  z-index: 100;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 1rem;
}

.status-indicator {
    font-size: 0.8rem;
    color: var(--fg);
    background: var(--bg);
    border: 1px solid var(--border);
    padding: 0.3rem 0.8rem;
    border-radius: 20px;
    opacity: 0;
    transition: opacity 0.3s;
    pointer-events: none;
    box-shadow: 0 2px 8px rgba(0,0,0,0.05);
}
.status-indicator.visible { opacity: 1; }

.btn {
  background: var(--fg);
  color: var(--bg);
  border: none;
  padding: 0.75rem 1.5rem;
  font-family: var(--font-ui);
  font-weight: 600;
  font-size: 0.9rem;
  cursor: pointer;
  transition: all 0.2s;
  border-radius: 8px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.1);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

@media (prefers-color-scheme: dark) {
    .btn { box-shadow: 0 4px 12px rgba(0,0,0,0.4); }
}

.btn:hover {
  transform: translateY(-1px);
  filter: brightness(1.1);
  box-shadow: 0 6px 16px rgba(0,0,0,0.15);
}
.btn:disabled { opacity: 0.6; cursor: not-allowed; transform: none; box-shadow: none; }

/* Toast */
.toast { 
  position: fixed;
  top: 80px;
  right: 2rem;
  background: var(--fg);
  color: var(--bg);
  padding: 0.8rem 1.2rem;
  border-radius: 8px;
  font-size: 0.9rem;
  opacity: 0;
  transform: translateY(-10px);
  transition: all 0.3s ease;
  pointer-events: none;
  z-index: 1000;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  box-shadow: 0 4px 12px rgba(0,0,0,0.15);
}
.toast.show { opacity: 1; transform: translateY(0); }

/* Overlay for result */
#result-overlay {
  position: absolute;
  inset: 0;
  background: rgba(0,0,0,0.4); /* Backdrop */
  backdrop-filter: blur(4px);
  display: none;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  z-index: 200;
  opacity: 0;
  transition: opacity 0.3s ease;
}

#result-overlay.visible { opacity: 1; }

.result-box {
  border: 1px solid var(--border);
  padding: 2.5rem;
  background: var(--bg);
  color: var(--fg);
  text-align: center;
  min-width: 320px;
  max-width: 90%;
  border-radius: 16px;
  box-shadow: 0 20px 50px rgba(0,0,0,0.25);
  transform: scale(0.95);
  transition: transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}

#result-overlay.visible .result-box { transform: scale(1); }
.result-box h3 { margin-top: 0; font-weight: 700; margin-bottom: 1.5rem; }

.link-display {
  background: var(--input-hover);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1rem;
  font-family: var(--font-mono);
  font-size: 0.9rem;
  word-break: break-all;
  user-select: all;
  color: var(--fg);
  margin-bottom: 1rem;
}
.action-row { display: flex; gap: 0.8rem; justify-content: center; margin-top: 1.5rem; }

/* Style the secondary button in result box */
.result-box .btn[style*="background:transparent"] {
    background: transparent !important;
    color: var(--fg) !important;
    border-color: transparent !important;
    box-shadow: none !important;
}
.result-box .btn[style*="background:transparent"]:hover {
    background: var(--input-hover) !important;
}