*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg:         #0d0f14;
  --surface:    #13161d;
  --card:       #181c25;
  --panel:      #1c2030;
  --border:     #252a36;
  --border-hi:  #2f3647;
  --accent:     #00e5a0;
  --accent-dim: #00b07a;
  --accent2:    #0099ff;
  --danger:     #ff4d6d;
  --warn:       #ffb627;
  --text:       #e2e8f0;
  --muted:      #64748b;
  --mono:       'JetBrains Mono', monospace;
  --sans:       'Syne', sans-serif;
}

html, body { height: 100%; }

body {
  font-family: var(--mono);
  background: var(--bg); color: var(--text);
  min-height: 100vh; display: flex; flex-direction: column;
  position: relative; overflow-x: hidden;
}

body::before {
  content: ''; position: fixed; inset: 0;
  background-image:
    linear-gradient(rgba(0,229,160,.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,229,160,.025) 1px, transparent 1px);
  background-size: 44px 44px; pointer-events: none; z-index: 0;
}

body::after {
  content: ''; position: fixed; width: 700px; height: 700px; border-radius: 50%;
  background: radial-gradient(circle, rgba(0,153,255,.04) 0%, transparent 70%);
  bottom: -200px; right: -150px; pointer-events: none; z-index: 0;
}

.page {
  position: relative; z-index: 1;
  display: flex; flex-direction: column;
  min-height: 100vh;
  padding: 1.75rem 1.5rem 2rem;
  max-width: 1400px; margin: 0 auto; width: 100%;
  gap: .75rem;
}

/* Header */
.header { display: flex; align-items: flex-end; justify-content: space-between; gap: 1rem; flex-wrap: wrap; }
.header-left .tag { font-size: .68rem; letter-spacing: .18em; text-transform: uppercase; color: var(--accent); margin-bottom: .35rem; display: flex; align-items: center; gap: .4rem; }
.header-left .tag::before { content: '>'; }
h1 { font-family: var(--sans); font-size: 1.9rem; font-weight: 700; letter-spacing: -.015em; line-height: 1; }
h1 span { color: var(--accent); }
.header-meta { font-size: .68rem; color: var(--muted); line-height: 1.7; text-align: right; }

/* Toolbar */
.toolbar {
  background: var(--card); border: 1px solid var(--border);
  border-radius: 10px; padding: .5rem .75rem;
  display: flex; align-items: center; gap: .25rem; flex-wrap: wrap;
}
.toolbar-btn {
  padding: .25rem .5rem; border-radius: 5px; border: none;
  background: none; color: var(--muted);
  font-family: var(--mono); font-size: .72rem; font-weight: 600;
  cursor: pointer; transition: all .12s; white-space: nowrap;
  display: flex; align-items: center;
}
.toolbar-btn:hover { color: var(--text); background: var(--surface); }
.toolbar-sep { width: 1px; height: 18px; background: var(--border); margin: 0 .15rem; flex-shrink: 0; }

/* Panels */
.panels { display: grid; grid-template-columns: 1fr 1fr; gap: .75rem; flex: 1; min-height: 0; }

.panel {
  display: flex; flex-direction: column;
  background: var(--card); border: 1px solid var(--border);
  border-radius: 12px; overflow: hidden; min-height: 500px;
}
.panel-header {
  display: flex; align-items: center; gap: .6rem;
  padding: .6rem 1rem; border-bottom: 1px solid var(--border);
  background: var(--surface); flex-shrink: 0;
}
.panel-title { font-size: .65rem; letter-spacing: .14em; text-transform: uppercase; color: var(--muted); flex: 1; }
.panel-actions { display: flex; align-items: center; gap: .4rem; }
.btn-sm {
  font-size: .65rem; color: var(--muted); cursor: pointer;
  padding: .22rem .5rem; border-radius: 4px;
  border: 1px solid transparent; background: none;
  font-family: var(--mono); transition: all .12s;
  display: flex; align-items: center; gap: .3rem;
}
.btn-sm:hover { color: var(--text); border-color: var(--border-hi); background: var(--card); }
.copy-ok { font-size: .65rem; color: var(--accent); opacity: 0; transition: opacity .2s; }
.copy-ok.show { opacity: 1; }

/* Output tabs */
.out-tabs { display: flex; gap: .15rem; }
.out-tab {
  font-size: .65rem; letter-spacing: .08em; text-transform: uppercase;
  padding: .2rem .6rem; border-radius: 4px; border: 1px solid transparent;
  background: none; color: var(--muted); font-family: var(--mono);
  cursor: pointer; transition: all .12s;
}
.out-tab.active { background: rgba(0,229,160,.1); color: var(--accent); border-color: rgba(0,229,160,.2); }
.out-tab:not(.active):hover { color: var(--text); }

textarea {
  flex: 1; width: 100%; background: transparent; border: none; outline: none;
  padding: 1rem; font-family: var(--mono); font-size: .8rem;
  color: var(--text); resize: none; line-height: 1.75;
  caret-color: var(--accent);
}
textarea::placeholder { color: var(--muted); opacity: .5; }
textarea:focus { background: rgba(0,229,160,.012); }

/* HTML output */
.html-output {
  flex: 1; padding: 1rem; overflow-y: auto;
  font-family: var(--mono); font-size: .78rem; line-height: 1.7;
  color: var(--text); white-space: pre-wrap; word-break: break-all;
}
.html-output.hidden { display: none; }

/* Preview */
.preview-output {
  flex: 1; padding: 1.25rem 1.5rem; overflow-y: auto;
  font-family: Georgia, 'Times New Roman', serif;
  font-size: .9rem; line-height: 1.8; color: #cbd5e1;
}
.preview-output.hidden { display: none; }
.preview-output h1,.preview-output h2,.preview-output h3,
.preview-output h4,.preview-output h5,.preview-output h6 {
  font-family: var(--sans); color: var(--text); margin: 1.4em 0 .5em; line-height: 1.3; font-weight: 700;
}
.preview-output h1 { font-size: 1.7em; }
.preview-output h2 { font-size: 1.4em; border-bottom: 1px solid var(--border); padding-bottom: .3em; }
.preview-output h3 { font-size: 1.15em; }
.preview-output h4 { font-size: 1em; }
.preview-output p { margin: .75em 0; }
.preview-output a { color: var(--accent); text-decoration: underline; }
.preview-output strong { color: var(--text); font-weight: 700; }
.preview-output em { font-style: italic; }
.preview-output del { opacity: .6; text-decoration: line-through; }
.preview-output code { font-family: var(--mono); font-size: .82em; background: rgba(0,229,160,.08); border: 1px solid rgba(0,229,160,.15); border-radius: 3px; padding: .1em .35em; color: var(--accent); }
.preview-output pre { background: var(--surface); border: 1px solid var(--border); border-radius: 8px; padding: 1rem; margin: 1em 0; overflow-x: auto; }
.preview-output pre code { background: none; border: none; padding: 0; color: var(--text); font-size: .82rem; }
.preview-output blockquote { border-left: 3px solid var(--accent); margin: 1em 0; padding: .5em 1em; color: var(--muted); background: rgba(0,229,160,.04); border-radius: 0 6px 6px 0; }
.preview-output ul,.preview-output ol { margin: .75em 0; padding-left: 1.75em; }
.preview-output li { margin: .25em 0; }
.preview-output hr { border: none; border-top: 1px solid var(--border); margin: 1.5em 0; }
.preview-output img { max-width: 100%; border-radius: 6px; }
.preview-output table { width: 100%; border-collapse: collapse; margin: 1em 0; font-size: .85em; font-family: var(--mono); }
.preview-output th { background: var(--surface); color: var(--accent); font-weight: 600; padding: .5em .75em; border: 1px solid var(--border); text-align: left; }
.preview-output td { padding: .45em .75em; border: 1px solid var(--border); }
.preview-output tr:nth-child(even) td { background: rgba(255,255,255,.02); }

/* Stats */
.stats-bar {
  display: flex; gap: 1.5rem; padding: .55rem 1rem;
  border-bottom: 1px solid var(--border); background: var(--surface); flex-wrap: wrap;
}
.stat { display: flex; align-items: center; gap: .4rem; font-size: .64rem; }
.stat-label { color: var(--muted); letter-spacing: .08em; text-transform: uppercase; }
.stat-val { color: var(--accent); font-weight: 600; }

/* Footer */
.footer-note { font-size: .63rem; color: var(--muted); text-align: center; letter-spacing: .04em; }
.footer-note a { color: var(--accent-dim); text-decoration: none; }
.footer-note a:hover { color: var(--accent); }

::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border-hi); border-radius: 99px; }

@keyframes fadeUp { from { opacity: 0; transform: translateY(12px); } to { opacity: 1; transform: none; } }
.page { animation: fadeUp .35s ease both; }

@media (max-width: 860px) {
  .panels { grid-template-columns: 1fr; }
  .header-meta { display: none; }
}

/* ── Site Nav ── */
.site-nav { position: sticky; top: 0; z-index: 1000; background: rgba(13,15,20,.92); backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px); border-bottom: 1px solid var(--border); }
.site-nav-inner { display: flex; align-items: center; height: 56px; gap: 2rem; max-width: 1400px; margin: 0 auto; padding: 0 2rem; width: 100%; }
.nav-logo { font-family: var(--mono); font-size: .85rem; font-weight: 700; color: var(--accent); text-decoration: none; letter-spacing: -.01em; white-space: nowrap; display: flex; align-items: center; gap: .15rem; }
.nav-logo .brace { color: var(--muted); font-weight: 400; }
.nav-links { display: flex; align-items: center; gap: 1.5rem; flex: 1; }
.nav-links a { font-family: var(--mono); font-size: .78rem; color: var(--muted); text-decoration: none; letter-spacing: .03em; transition: color .14s; }
.nav-links a:hover { color: var(--text); }
.nav-dropdown { position: relative; }
.nav-dropdown-toggle { display: inline-flex; align-items: center; gap: .35rem; background: none; border: none; cursor: pointer; font-family: var(--mono); font-size: .78rem; color: var(--accent); padding: 0; letter-spacing: .03em; transition: color .14s; }
.nav-dropdown-toggle:hover { color: #00ffb3; }
.nav-dropdown-toggle svg { transition: transform .2s ease; }
.nav-dropdown.open .nav-dropdown-toggle svg { transform: rotate(180deg); }
.nav-dropdown-menu { position: absolute; top: calc(100% + 1rem); left: 50%; transform: translateX(-50%); min-width: 220px; background: #181c25; border: 1px solid var(--border-hi); border-radius: 10px; padding: .4rem; display: none; flex-direction: column; gap: .15rem; box-shadow: 0 12px 32px rgba(0,0,0,.6); z-index: 999; }
.nav-dropdown.open .nav-dropdown-menu { display: flex; animation: dropIn .15s ease both; }
.nav-dropdown-menu a { display: flex; align-items: center; gap: .6rem; padding: .55rem .75rem; border-radius: 7px; font-size: .75rem; color: #94a3b8; text-decoration: none; transition: background .12s, color .12s; white-space: nowrap; letter-spacing: .02em; }
.nav-dropdown-menu a:hover { background: rgba(0,229,160,.07); color: var(--accent); }
.nav-dropdown-menu a.active { background: rgba(0,229,160,.1); color: var(--accent); }
.nav-dropdown-menu a svg { opacity: .55; flex-shrink: 0; }
.nav-dropdown-menu a:hover svg, .nav-dropdown-menu a.active svg { opacity: 1; }
@keyframes dropIn { from { opacity: 0; transform: translateX(-50%) translateY(-6px); } to { opacity: 1; transform: translateX(-50%) translateY(0); } }
.nav-cv { font-family: var(--mono); font-size: .72rem; font-weight: 700; padding: .35rem .85rem; border-radius: 6px; background: var(--accent); color: #0d0f14; text-decoration: none; letter-spacing: .05em; transition: background .14s; white-space: nowrap; margin-left: auto; }
.nav-cv:hover { background: #00ffb3; }
@media (max-width: 640px) { .nav-links a:not(.nav-dropdown-toggle) { display: none; } }