/*
  Ultra Premium Markdown Previewer
  Black & White glassmorphism aesthetic
*/

:root {
  --bg: #0b0b0b;
  --bg-soft: #111;
  --fg: #fafafa;
  --muted: #b5b5b5;
  --glass: rgba(255, 255, 255, 0.06);
  --glass-strong: rgba(255, 255, 255, 0.12);
  --stroke: rgba(255, 255, 255, 0.22);
  --ring: rgba(255, 255, 255, 0.38);
  --shadow: 0 10px 40px rgba(0,0,0,.45), 0 2px 10px rgba(0,0,0,.35);
}

* { box-sizing: border-box; }
html, body { height: 100%; }

body {
  margin: 0;
  color: var(--fg);
  background: radial-gradient(1200px 800px at 10% 10%, #151515 0%, var(--bg) 55%, #050505 100%);
  font-family: 'Inter', system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  letter-spacing: .2px;
  overflow-x: hidden;
}

.brand-title { font-family: 'Playfair Display', serif; letter-spacing: .5px; }

/* Three.js canvas behind everything */
#bg-canvas {
  position: fixed;
  inset: 0;
  width: 100vw;
  height: 100vh;
  z-index: 1;
}

/* Panels */
.panel {
  position: relative;
  z-index: 10;
  border-radius: 18px;
  border: 1px solid var(--stroke);
  background: linear-gradient(180deg, var(--glass-strong) 0%, var(--glass) 100%);
  backdrop-filter: blur(16px) saturate(130%);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.panel-header, .panel-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: .75rem;
  padding: .9rem 1.1rem;
  border-bottom: 1px solid rgba(255,255,255,.12);
}
.panel-footer { border-top: 1px solid rgba(255,255,255,.12); border-bottom: none; }

.panel-body { padding: 0.75rem; }

.glassy-btn {
  backdrop-filter: blur(8px) saturate(150%);
  background: rgba(255,255,255,.08);
  border-color: rgba(255,255,255,.28) !important;
}
.glassy-btn:hover{ background: rgba(255,255,255,.16); }

/* Editor */
.editor-textarea {
  width: 100%;
  height: clamp(420px, 70vh, 74vh);
  resize: vertical;
  padding: 1rem 1.25rem;
  color: var(--fg);
  background: rgba(255,255,255,.03);
  border: 1px solid rgba(255,255,255,.18);
  outline: none;
  border-radius: 14px;
  box-shadow: inset 0 0 0 1px rgba(255,255,255,.04);
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
  line-height: 1.6;
}
.editor-textarea:focus {
  box-shadow: 0 0 0 3px var(--ring), inset 0 0 0 1px rgba(255,255,255,.08);
}

/* Preview */
#preview-wrapper { overflow: auto; }
#preview {
  padding: 1rem 1.25rem;
  min-height: clamp(420px, 70vh, 74vh);
}

.markdown-body {
  color: var(--fg);
  --md-muted: var(--muted);
}

.markdown-body h1,.markdown-body h2,.markdown-body h3,.markdown-body h4,.markdown-body h5,.markdown-body h6{
  font-family: 'Playfair Display', serif;
  letter-spacing: .4px;
}
.markdown-body h1{ font-size: 2.2rem; }
.markdown-body h2{ font-size: 1.8rem; }
.markdown-body h3{ font-size: 1.5rem; }

.markdown-body p, .markdown-body li, .markdown-body td, .markdown-body th { color: var(--fg); }
.markdown-body blockquote {
  border-left: 3px solid rgba(255,255,255,.35);
  background: rgba(255,255,255,.05);
  padding: .75rem 1rem;
  color: var(--muted);
  margin: 1rem 0;
}

.markdown-body a { color: #fff; text-decoration-color: rgba(255,255,255,.35); }

.markdown-body pre { background: rgba(0,0,0,.5); border: 1px solid rgba(255,255,255,.18); border-radius: 12px; }
.markdown-body code { color: #fff; }

.markdown-body .toc { padding: .5rem .75rem; border: 1px solid rgba(255,255,255,.18); border-radius: 10px; background: rgba(255,255,255,.04); }

/* Callout containers */
.markdown-body .info, .markdown-body .tip, .markdown-body .warning, .markdown-body .success, .markdown-body .note {
  border: 1px solid rgba(255,255,255,.22);
  background: rgba(255,255,255,.05);
  border-radius: 12px;
  padding: .75rem .9rem;
  margin: 1rem 0;
}
.markdown-body .info { border-color: rgba(255,255,255,.28); }
.markdown-body .tip { border-color: rgba(255,255,255,.34); }
.markdown-body .warning { border-color: rgba(255,255,255,.42); }
.markdown-body .success { border-color: rgba(255,255,255,.30); }
.markdown-body .note { border-color: rgba(255,255,255,.26); }

.markdown-body .info::before,
.markdown-body .tip::before,
.markdown-body .warning::before,
.markdown-body .success::before,
.markdown-body .note::before{
  display:inline-block; margin-right:.5rem; color: #fff; opacity:.75;
}
.markdown-body .info::before{ content: "ⓘ"; }
.markdown-body .tip::before{ content: "✓"; }
.markdown-body .warning::before{ content: "!"; }
.markdown-body .success::before{ content: "★"; }
.markdown-body .note::before{ content: "✧"; }

.markdown-body table {
  width: 100%;
  border-collapse: collapse;
  overflow: hidden;
  border: 1px solid rgba(255,255,255,.18);
}
.markdown-body th, .markdown-body td {
  border: 1px solid rgba(255,255,255,.18);
  padding: .5rem .75rem;
}
.markdown-body tr:nth-child(2n){ background: rgba(255,255,255,.04); }

kbd {
  background: #000;
  border: 1px solid rgba(255,255,255,.25);
  box-shadow: inset 0 -2px rgba(255,255,255,.1);
  border-radius: 6px;
  padding: 2px 6px;
}

/* Fancy ring animation target */
.ring-pulse {
  position: relative;
}
.ring-pulse::after {
  content: "";
  position: absolute; inset: -2px;
  border-radius: 16px;
  border: 2px solid rgba(255,255,255,.3);
  opacity: 0;
  transition: opacity .2s ease;
}

.ring-pulse:hover::after, .ring-pulse.dragover::after, .ring-pulse:focus-within::after {
  opacity: 1;
  box-shadow: inset 0 0 0 6px rgba(255,255,255,.06);
}

/* Scrollbar */
*::-webkit-scrollbar{ width: 10px; }
*::-webkit-scrollbar-thumb{ background: rgba(255,255,255,.22); border-radius: 8px; }
*::-webkit-scrollbar-track{ background: rgba(255,255,255,.06); }

/* Shimmer accent */
.panel::before{
  content:""; position:absolute; inset:0; pointer-events:none;
  background: radial-gradient(120px 60px at 0% 0%, rgba(255,255,255,.2), transparent 60%),
              radial-gradient(200px 120px at 100% 0%, rgba(255,255,255,.08), transparent 60%),
              radial-gradient(200px 120px at 0% 100%, rgba(255,255,255,.06), transparent 60%);
  opacity:.55;
}

/* Small screens */
@media (max-width: 576px) {
  .panel-body { padding: .5rem; }
  #preview, .editor-textarea { min-height: 56vh; }
}