/* ═══════════════════════════════════════════════════════════════════
   markdown-tool.css  -  Markdown Editor  |  Scoped under #mde-root
   Theme: Obsidian Night × Emerald Accent - Premium SaaS Editor
═══════════════════════════════════════════════════════════════════ */

/* ── Tokens ────────────────────────────────────────────────────── */
#mde-root {
  --mde-bg:           #0b0e18;
  --mde-surface:      #111520;
  --mde-surface2:     #181d2e;
  --mde-surface3:     #1e2438;
  --mde-border:       #262c47;
  --mde-border2:      #303758;

  --mde-accent:       #10b981;
  --mde-accent-soft:  rgba(16, 185, 129, 0.14);
  --mde-accent2:      #34d399;
  --mde-accent-dark:  #059669;
  --mde-glow:         rgba(16, 185, 129, 0.28);

  --mde-blue:         #60a5fa;
  --mde-purple:       #a78bfa;
  --mde-orange:       #fb923c;

  --mde-ok:           #34d399;
  --mde-err:          #f87171;
  --mde-warn:         #fbbf24;

  --mde-text:         #dde2f4;
  --mde-muted:        #6b7499;
  --mde-faint:        #2d3352;

  --mde-radius:       14px;
  --mde-radius-sm:    8px;
  --mde-font:         'DM Sans', 'Outfit', system-ui, sans-serif;
  --mde-mono:         'JetBrains Mono', 'Fira Code', 'Cascadia Code', monospace;

  --mde-shadow:       0 6px 32px rgba(0,0,0,0.55);
  --mde-shadow-sm:    0 2px 12px rgba(0,0,0,0.35);

  font-family: var(--mde-font);
  background: var(--mde-bg);
  color: var(--mde-text);
  min-height: 100vh;
  box-sizing: border-box;
}

/* Light theme override */
#mde-root.mde-light {
  --mde-bg:           #f4f6fb;
  --mde-surface:      #ffffff;
  --mde-surface2:     #f0f2f8;
  --mde-surface3:     #e8ebf4;
  --mde-border:       #d1d8ee;
  --mde-border2:      #b8c3df;
  --mde-text:         #1a1f38;
  --mde-muted:        #5a6285;
  --mde-faint:        #d1d8ee;
  --mde-glow:         rgba(16, 185, 129, 0.18);
  --mde-shadow:       0 6px 32px rgba(0,0,0,0.12);
  --mde-shadow-sm:    0 2px 12px rgba(0,0,0,0.08);
}

#mde-root *, #mde-root *::before, #mde-root *::after {
  box-sizing: inherit;
}

/* ── Hero ──────────────────────────────────────────────────────── */
.mde-hero {
  text-align: center;
  padding: 52px 24px 36px;
  background:
    radial-gradient(ellipse 65% 45% at 50% 0%, rgba(16,185,129,0.14) 0%, transparent 70%),
    var(--mde-bg);
  border-bottom: 1px solid var(--mde-border);
  position: relative;
  overflow: hidden;
}

.mde-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%2310b981' fill-opacity='0.03'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
  pointer-events: none;
}

.mde-hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  background: var(--mde-accent-soft);
  border: 1px solid rgba(16,185,129,0.3);
  color: var(--mde-accent2);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .06em;
  text-transform: uppercase;
  padding: 5px 14px;
  border-radius: 99px;
  margin-bottom: 22px;
}

.mde-hero-badge svg {
  width: 14px; height: 14px;
}

.mde-hero h1 {
  font-size: clamp(2rem, 5vw, 3.2rem);
  font-weight: 800;
  letter-spacing: -.03em;
  line-height: 1.1;
  color: var(--mde-text);
  margin: 0 0 14px;
}

.mde-hero h1 span {
  color: var(--mde-accent);
}

.mde-hero p {
  font-size: 1.05rem;
  color: var(--mde-muted);
  max-width: 580px;
  margin: 0 auto;
  line-height: 1.65;
}

/* ── App Shell ─────────────────────────────────────────────────── */
.mde-app {
  max-width: 1480px;
  margin: 0 auto;
  padding: 28px 20px 48px;
}

/* ── Controls Bar ──────────────────────────────────────────────── */
.mde-controls {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 14px;
  flex-wrap: wrap;
}

.mde-toolbar {
  display: flex;
  align-items: center;
  gap: 3px;
  background: var(--mde-surface);
  border: 1px solid var(--mde-border);
  border-radius: var(--mde-radius-sm);
  padding: 5px 8px;
  flex: 1;
  flex-wrap: wrap;
  min-width: 0;
  overflow-x: auto;
}

.mde-tb-btn {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  background: transparent;
  border: none;
  color: var(--mde-muted);
  font-family: var(--mde-font);
  font-size: 13px;
  font-weight: 600;
  padding: 6px 10px;
  border-radius: 6px;
  cursor: pointer;
  transition: background .15s, color .15s;
  white-space: nowrap;
  flex-shrink: 0;
}

.mde-tb-btn:hover {
  background: var(--mde-surface2);
  color: var(--mde-text);
}

.mde-tb-btn svg {
  width: 15px; height: 15px;
  flex-shrink: 0;
}

.mde-tb-divider {
  width: 1px;
  height: 20px;
  background: var(--mde-border);
  margin: 0 4px;
  flex-shrink: 0;
}

/* Right-side controls */
.mde-ctrl-group {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}

.mde-icon-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px; height: 36px;
  border-radius: var(--mde-radius-sm);
  border: 1px solid var(--mde-border);
  background: var(--mde-surface);
  color: var(--mde-muted);
  cursor: pointer;
  transition: background .15s, color .15s, border-color .15s;
}

.mde-icon-btn:hover {
  background: var(--mde-surface2);
  color: var(--mde-text);
  border-color: var(--mde-border2);
}

.mde-icon-btn.is-active {
  background: var(--mde-accent-soft);
  color: var(--mde-accent);
  border-color: rgba(16,185,129,0.4);
}

.mde-icon-btn svg {
  width: 16px; height: 16px;
}

/* Action buttons */
.mde-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 14px;
  flex-wrap: wrap;
}

.mde-btn {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 8px 16px;
  border-radius: var(--mde-radius-sm);
  font-family: var(--mde-font);
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: all .18s;
  border: 1px solid transparent;
  white-space: nowrap;
}

.mde-btn svg {
  width: 15px; height: 15px;
  flex-shrink: 0;
}

.mde-btn-ghost {
  background: var(--mde-surface);
  border-color: var(--mde-border);
  color: var(--mde-muted);
}

.mde-btn-ghost:hover {
  background: var(--mde-surface2);
  color: var(--mde-text);
  border-color: var(--mde-border2);
}

.mde-btn-primary {
  background: var(--mde-accent);
  color: #fff;
  border-color: var(--mde-accent);
  box-shadow: 0 0 0 0 var(--mde-glow);
}

.mde-btn-primary:hover {
  background: var(--mde-accent2);
  box-shadow: 0 0 18px var(--mde-glow);
}

.mde-btn-danger {
  background: var(--mde-surface);
  border-color: var(--mde-border);
  color: var(--mde-err);
}

.mde-btn-danger:hover {
  background: rgba(248,113,113,0.1);
  border-color: rgba(248,113,113,0.4);
}

/* Word / char counter */
.mde-stats {
  margin-left: auto;
  font-size: 12px;
  color: var(--mde-muted);
  display: flex;
  gap: 12px;
}

.mde-stats span {
  white-space: nowrap;
}

/* ── Mobile Tab Switcher ────────────────────────────────────────── */
.mde-tab-switcher {
  display: none;
  background: var(--mde-surface);
  border: 1px solid var(--mde-border);
  border-radius: var(--mde-radius-sm);
  padding: 4px;
  margin-bottom: 14px;
  width: 100%;
}

.mde-tab-btn {
  flex: 1;
  padding: 8px;
  border: none;
  border-radius: 6px;
  background: transparent;
  color: var(--mde-muted);
  font-family: var(--mde-font);
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: all .15s;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
}

.mde-tab-btn svg { width: 14px; height: 14px; }

.mde-tab-btn.is-active {
  background: var(--mde-accent-soft);
  color: var(--mde-accent);
}

/* ── Editor / Preview Split ─────────────────────────────────────── */
.mde-split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  height: 560px;
  transition: height .2s;
}

.mde-split.mde-fullscreen {
  position: fixed;
  inset: 0;
  z-index: 9999;
  grid-template-columns: 1fr 1fr;
  height: 100vh;
  gap: 0;
  background: var(--mde-bg);
  border-radius: 0;
  padding: 0;
}

/* ── Panel ──────────────────────────────────────────────────────── */
.mde-panel {
  display: flex;
  flex-direction: column;
  background: var(--mde-surface);
  border: 1px solid var(--mde-border);
  border-radius: var(--mde-radius);
  overflow: hidden;
  min-height: 0;
}

.mde-split.mde-fullscreen .mde-panel {
  border-radius: 0;
  border: none;
  border-right: 1px solid var(--mde-border);
}

.mde-split.mde-fullscreen .mde-panel:last-child {
  border-right: none;
}

.mde-panel-header {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 11px 16px;
  border-bottom: 1px solid var(--mde-border);
  background: var(--mde-surface2);
  font-size: 12px;
  font-weight: 600;
  color: var(--mde-muted);
  letter-spacing: .04em;
  text-transform: uppercase;
  flex-shrink: 0;
}

.mde-panel-header svg { width: 13px; height: 13px; }

.mde-panel-header-dot {
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--mde-accent);
  flex-shrink: 0;
  animation: mde-pulse 2.5s ease-in-out infinite;
}

@keyframes mde-pulse {
  0%, 100% { opacity: 1; }
  50%       { opacity: .35; }
}

/* ── Textarea (Editor) ──────────────────────────────────────────── */
#mde-editor {
  flex: 1;
  width: 100%;
  border: none;
  outline: none;
  resize: none;
  background: var(--mde-surface);
  color: var(--mde-text);
  font-family: var(--mde-mono);
  font-size: 14px;
  line-height: 1.75;
  padding: 18px 20px;
  tab-size: 2;
  caret-color: var(--mde-accent);
  overflow-y: auto;
  min-height: 0;
}

#mde-editor::placeholder { color: var(--mde-faint); }
#mde-editor:focus { background: var(--mde-surface); }

/* ── Preview Panel ──────────────────────────────────────────────── */
#mde-preview {
  flex: 1;
  overflow-y: auto;
  padding: 18px 22px;
  min-height: 0;
  /* Prose styles for rendered markdown */
  font-family: var(--mde-font);
  font-size: 15px;
  line-height: 1.8;
  color: var(--mde-text);
}

/* Scrollbars */
#mde-editor::-webkit-scrollbar,
#mde-preview::-webkit-scrollbar { width: 5px; }
#mde-editor::-webkit-scrollbar-track,
#mde-preview::-webkit-scrollbar-track { background: transparent; }
#mde-editor::-webkit-scrollbar-thumb,
#mde-preview::-webkit-scrollbar-thumb {
  background: var(--mde-border2);
  border-radius: 99px;
}

/* ── Preview Markdown Prose ─────────────────────────────────────── */
#mde-preview h1,
#mde-preview h2,
#mde-preview h3,
#mde-preview h4,
#mde-preview h5,
#mde-preview h6 {
  font-weight: 700;
  line-height: 1.25;
  margin: 1.4em 0 .6em;
  color: var(--mde-text);
  letter-spacing: -.02em;
}

#mde-preview h1 { font-size: 1.85em; border-bottom: 2px solid var(--mde-border); padding-bottom: .35em; }
#mde-preview h2 { font-size: 1.45em; border-bottom: 1px solid var(--mde-border); padding-bottom: .25em; }
#mde-preview h3 { font-size: 1.2em; }
#mde-preview h4 { font-size: 1em; color: var(--mde-muted); }

#mde-preview p { margin: 0 0 1em; }

#mde-preview a {
  color: var(--mde-accent2);
  text-decoration: underline;
  text-underline-offset: 3px;
}
#mde-preview a:hover { color: var(--mde-accent); }

#mde-preview strong { color: var(--mde-text); font-weight: 700; }
#mde-preview em     { color: var(--mde-accent2); font-style: italic; }

#mde-preview ul,
#mde-preview ol {
  padding-left: 1.6em;
  margin: 0 0 1em;
}
#mde-preview li { margin-bottom: .35em; }
#mde-preview li > ul,
#mde-preview li > ol { margin: .25em 0 0; }

#mde-preview blockquote {
  border-left: 3px solid var(--mde-accent);
  background: var(--mde-accent-soft);
  margin: 1em 0;
  padding: 10px 18px;
  border-radius: 0 var(--mde-radius-sm) var(--mde-radius-sm) 0;
  color: var(--mde-muted);
  font-style: italic;
}

#mde-preview code {
  font-family: var(--mde-mono);
  font-size: .88em;
  background: var(--mde-surface2);
  color: var(--mde-accent2);
  padding: 2px 7px;
  border-radius: 5px;
  border: 1px solid var(--mde-border);
}

#mde-preview pre {
  background: var(--mde-surface2);
  border: 1px solid var(--mde-border);
  border-radius: var(--mde-radius-sm);
  padding: 16px 18px;
  overflow-x: auto;
  margin: 1em 0;
  position: relative;
}

#mde-preview pre code {
  background: none;
  border: none;
  padding: 0;
  color: var(--mde-text);
  font-size: .9em;
}

#mde-preview hr {
  border: none;
  border-top: 1px solid var(--mde-border);
  margin: 2em 0;
}

#mde-preview table {
  width: 100%;
  border-collapse: collapse;
  margin: 1em 0;
  font-size: .93em;
}

#mde-preview th {
  background: var(--mde-surface2);
  border: 1px solid var(--mde-border);
  padding: 8px 14px;
  font-weight: 700;
  text-align: left;
  color: var(--mde-accent2);
}

#mde-preview td {
  border: 1px solid var(--mde-border);
  padding: 7px 14px;
}

#mde-preview tr:nth-child(even) td {
  background: var(--mde-surface2);
}

#mde-preview img {
  max-width: 100%;
  border-radius: var(--mde-radius-sm);
  border: 1px solid var(--mde-border);
}

#mde-preview .mde-empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100%;
  gap: 12px;
  color: var(--mde-faint);
  text-align: center;
  padding: 20px;
  min-height: 200px;
}

#mde-preview .mde-empty-state svg {
  width: 48px; height: 48px;
  opacity: .35;
}

#mde-preview .mde-empty-state p {
  font-size: 13px;
  color: var(--mde-muted);
  margin: 0;
}

/* ── Drop Zone Overlay ──────────────────────────────────────────── */
#mde-drop-overlay {
  display: none;
  position: absolute;
  inset: 0;
  background: rgba(16,185,129,0.12);
  border: 2px dashed var(--mde-accent);
  border-radius: var(--mde-radius);
  z-index: 100;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  font-weight: 600;
  color: var(--mde-accent);
  gap: 10px;
  pointer-events: none;
}

#mde-drop-overlay.is-active {
  display: flex;
}

#mde-editor-wrap {
  position: relative;
  display: flex;
  flex-direction: column;
  flex: 1;
  min-height: 0;
}

/* ── Toast ──────────────────────────────────────────────────────── */
.mde-toast {
  position: fixed;
  bottom: 28px;
  left: 50%;
  transform: translateX(-50%) translateY(10px);
  background: var(--mde-surface3);
  border: 1px solid var(--mde-border2);
  color: var(--mde-text);
  font-size: 13px;
  font-weight: 500;
  padding: 10px 20px;
  border-radius: 99px;
  box-shadow: var(--mde-shadow);
  z-index: 10000;
  opacity: 0;
  pointer-events: none;
  transition: opacity .2s, transform .2s;
  white-space: nowrap;
}

.mde-toast.is-visible {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

.mde-toast.mde-toast-ok    { border-color: rgba(52,211,153,.4); color: var(--mde-ok); }
.mde-toast.mde-toast-err   { border-color: rgba(248,113,113,.4); color: var(--mde-err); }

/* ── SEO / Docs section ─────────────────────────────────────────── */
.mde-seo {
  max-width: 860px;
  margin: 60px auto 0;
  padding: 0 4px;
}

.mde-seo h2 {
  font-size: 1.55rem;
  font-weight: 800;
  letter-spacing: -.025em;
  color: var(--mde-text);
  margin: 0 0 16px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--mde-border);
}

.mde-seo h3 {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--mde-accent2);
  margin: 28px 0 8px;
}

.mde-seo p {
  color: var(--mde-muted);
  line-height: 1.75;
  margin: 0 0 14px;
}

.mde-seo code {
  font-family: var(--mde-mono);
  font-size: .88em;
  background: var(--mde-surface);
  color: var(--mde-accent2);
  padding: 2px 7px;
  border-radius: 5px;
  border: 1px solid var(--mde-border);
}

.mde-seo table {
  width: 100%;
  border-collapse: collapse;
  margin: 12px 0 20px;
  font-size: .93em;
}

.mde-seo th {
  background: var(--mde-surface);
  border: 1px solid var(--mde-border);
  padding: 9px 14px;
  font-weight: 700;
  text-align: left;
  color: var(--mde-accent2);
}

.mde-seo td {
  border: 1px solid var(--mde-border);
  padding: 8px 14px;
  color: var(--mde-muted);
}

.mde-seo em { color: var(--mde-text); font-style: normal; font-weight: 600; }

/* FAQ */
.mde-faq-item {
  border: 1px solid var(--mde-border);
  border-radius: var(--mde-radius-sm);
  margin-bottom: 10px;
  overflow: hidden;
  transition: border-color .15s;
}

.mde-faq-item:hover { border-color: var(--mde-border2); }

.mde-faq-q {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 18px;
  cursor: pointer;
  font-weight: 600;
  font-size: .95rem;
  color: var(--mde-text);
  background: var(--mde-surface);
  user-select: none;
  transition: background .15s;
}

.mde-faq-q:hover { background: var(--mde-surface2); }

.mde-faq-chevron {
  transition: transform .2s;
  flex-shrink: 0;
  color: var(--mde-muted);
}

.mde-faq-item.is-open .mde-faq-chevron { transform: rotate(180deg); }

.mde-faq-a {
  display: none;
  padding: 14px 18px;
  font-size: .93rem;
  color: var(--mde-muted);
  line-height: 1.7;
  background: var(--mde-surface2);
  border-top: 1px solid var(--mde-border);
}

.mde-faq-item.is-open .mde-faq-a { display: block; }

/* ── Responsive: Mobile ─────────────────────────────────────────── */
@media (max-width: 768px) {
  .mde-hero { padding: 36px 16px 28px; }

  .mde-tab-switcher {
    display: flex;
    gap: 4px;
  }

  .mde-split {
    grid-template-columns: 1fr;
    height: 480px;
  }

  .mde-split .mde-panel:last-child { display: none; }
  .mde-split.mde-show-preview .mde-panel:first-child { display: none; }
  .mde-split.mde-show-preview .mde-panel:last-child { display: flex; }

  .mde-toolbar { overflow-x: auto; flex-wrap: nowrap; }
  .mde-tb-btn span { display: none; }

  .mde-actions { gap: 6px; }
  .mde-stats { display: none; }

  .mde-controls { gap: 8px; }
}

@media (max-width: 480px) {
  .mde-split { height: 400px; }
  .mde-btn span { display: none; }
}