.page { padding: 40px 20px; max-width: 1400px; margin: 0 auto; }
.page h1 { font-size: 26px; font-weight: 700; color: #fff; margin-bottom: 6px; }
.page .subtitle { color: #888; margin-bottom: 20px; font-size: 14px; }

label {
  display: block; font-size: 13px; font-weight: 600; color: #aaa;
  margin-bottom: 6px; text-transform: uppercase; letter-spacing: 0.5px;
}

.actions { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 16px; align-items: center; }
.btn {
  padding: 9px 16px; background: #141414; border: 1px solid #2a2a2a;
  color: #ccc; border-radius: 6px; font-size: 13px; cursor: pointer; transition: all 0.15s;
  font-family: inherit;
}
.btn:hover { border-color: #ff4444; color: #fff; background: #1f1f1f; }
.btn-reset { margin-left: auto; }
.btn-reset:hover { border-color: #f87171; color: #f87171; }

.tabs { display: none; gap: 4px; margin-bottom: 10px; }
.tab {
  padding: 8px 16px; background: #141414; border: 1px solid #2a2a2a;
  color: #888; border-radius: 6px 6px 0 0; font-size: 13px; cursor: pointer;
  font-family: inherit;
}
.tab.active { color: #fff; border-color: #ff4444; background: #1f1f1f; }

.grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.col { display: flex; flex-direction: column; }

#md-input {
  width: 100%; min-height: 560px; resize: vertical;
  background: #0d0d0d; border: 1px solid #2a2a2a; border-radius: 8px;
  color: #e1e1e1; font-size: 13px; padding: 14px; outline: none;
  font-family: 'SF Mono', Monaco, 'Cascadia Code', monospace;
  line-height: 1.6; transition: border-color 0.2s; tab-size: 2;
}
#md-input:focus { border-color: #ff4444; }

.preview {
  min-height: 560px;
  background: #0d0d0d; border: 1px solid #2a2a2a; border-radius: 8px;
  padding: 20px 24px; color: #e1e1e1;
  overflow-x: auto;
  line-height: 1.6; font-size: 15px;
}
.preview h1, .preview h2, .preview h3, .preview h4, .preview h5, .preview h6 {
  color: #fff; margin: 24px 0 12px; line-height: 1.3; font-weight: 700;
}
.preview h1 { font-size: 28px; border-bottom: 1px solid #2a2a2a; padding-bottom: 8px; }
.preview h2 { font-size: 22px; border-bottom: 1px solid #222; padding-bottom: 6px; }
.preview h3 { font-size: 18px; }
.preview h4 { font-size: 16px; }
.preview h5, .preview h6 { font-size: 14px; color: #bbb; }
.preview p { margin: 0 0 14px; }
.preview a { color: #ff4444; }
.preview strong { color: #fff; font-weight: 700; }
.preview em { color: #e1e1e1; font-style: italic; }
.preview del { color: #888; }
.preview code {
  font-family: 'SF Mono', Monaco, monospace; font-size: 0.88em;
  background: #1a1a1a; padding: 2px 6px; border-radius: 4px;
  color: #ff9e64; border: 1px solid #222;
}
.preview pre {
  background: #0a0a0a; border: 1px solid #222; border-radius: 8px;
  padding: 14px 16px; margin: 0 0 14px; overflow-x: auto;
}
.preview pre code {
  background: transparent; padding: 0; border: 0; color: #e1e1e1;
  font-size: 13px; line-height: 1.5;
}
.preview blockquote {
  border-left: 3px solid #ff4444; padding: 4px 14px;
  margin: 0 0 14px; color: #aaa; background: rgba(255,68,68,0.04);
  border-radius: 0 6px 6px 0;
}
.preview blockquote p:last-child { margin-bottom: 0; }
.preview ul, .preview ol { margin: 0 0 14px; padding-left: 28px; }
.preview li { margin-bottom: 4px; }
.preview hr {
  border: 0; border-top: 1px solid #2a2a2a; margin: 22px 0;
}
.preview table {
  border-collapse: collapse; margin-bottom: 14px;
  border: 1px solid #2a2a2a; border-radius: 6px; overflow: hidden;
}
.preview th, .preview td {
  padding: 8px 14px; border: 1px solid #2a2a2a; text-align: left;
}
.preview th { background: #141414; color: #fff; font-weight: 700; }
.preview tr:nth-child(even) td { background: #0f0f0f; }
.preview img { max-width: 100%; border-radius: 6px; margin: 8px 0; }

.stats {
  color: #666; font-size: 12px; margin-top: 6px; text-transform: none;
  letter-spacing: normal; font-weight: 500; display: block;
  font-family: 'SF Mono', Monaco, monospace;
}

@media (max-width: 800px) {
  .tabs { display: flex; }
  .grid { grid-template-columns: 1fr; }
  .col-write, .col-preview { display: none; }
  .col.tab-active { display: flex; }
  #md-input, .preview { min-height: 400px; }
  .btn-reset { margin-left: 0; }
}