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

:root {
  --bg:         #0d0f14;
  --surface:    #13161d;
  --card:       #181c25;
  --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: 600px;
  height: 600px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(0,229,160,.05) 0%, transparent 70%);
  top: -100px;
  right: -100px;
  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%;
}

/* Header */
.header { display: flex; align-items: flex-end; justify-content: space-between; gap: 1rem; margin-bottom: 1.5rem; 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; }

/* Mode switcher */
.mode-bar { display: flex; align-items: center; gap: .5rem; margin-bottom: 1rem; flex-wrap: wrap; }
.mode-tabs { display: flex; background: var(--surface); border: 1px solid var(--border); border-radius: 8px; padding: .25rem; gap: .2rem; }
.mode-tab {
  font-family: var(--mono); font-size: .72rem; font-weight: 500; letter-spacing: .07em;
  padding: .4rem 1rem; border-radius: 6px; border: none; cursor: pointer;
  transition: all .15s ease; background: transparent; color: var(--muted);
}
.mode-tab.active { background: var(--accent); color: #0d0f14; font-weight: 700; }
.mode-tab:not(.active):hover { color: var(--text); background: var(--border); }
.toolbar-sep { width: 1px; height: 22px; background: var(--border); flex-shrink: 0; }

/* Buttons */
.btn {
  font-family: var(--mono); font-size: .7rem; font-weight: 500; letter-spacing: .07em;
  padding: .42rem .85rem; border-radius: 6px; border: 1px solid var(--border-hi);
  cursor: pointer; transition: all .14s ease;
  display: inline-flex; align-items: center; gap: .4rem; white-space: nowrap;
}
.btn-ghost { background: transparent; color: var(--muted); }
.btn-ghost:hover { color: var(--text); background: var(--surface); border-color: var(--border-hi); }
.btn-swap { background: rgba(0,153,255,.08); color: var(--accent2); border-color: rgba(0,153,255,.25); }
.btn-swap:hover { background: rgba(0,153,255,.15); }
.btn-danger { background: transparent; color: var(--danger); border-color: rgba(255,77,109,.3); }
.btn-danger:hover { background: rgba(255,77,109,.08); }

/* Flash */
.flash { font-size: .68rem; padding: .35rem .7rem; border-radius: 5px; opacity: 0; transition: opacity .2s; margin-left: auto; }
.flash.show { opacity: 1; }
.flash.ok   { color: var(--accent);  background: rgba(0,229,160,.08);  border: 1px solid rgba(0,229,160,.2); }
.flash.err  { color: var(--danger);  background: rgba(255,77,109,.08); border: 1px solid rgba(255,77,109,.2); }
.flash.warn { color: var(--warn);    background: rgba(255,182,39,.08); border: 1px solid rgba(255,182,39,.2); }

/* Panels */
.panels { display: grid; grid-template-columns: 1fr auto 1fr; gap: .75rem; align-items: start; flex: 1; }

@media (max-width: 720px) {
  .panels { grid-template-columns: 1fr; }
  .swap-col { display: none; }
  .header-meta { display: none; }
}

.panel {
  display: flex; flex-direction: column;
  background: var(--card); border: 1px solid var(--border);
  border-radius: 12px; overflow: hidden; min-height: 420px;
}
.panel-header {
  display: flex; align-items: center; gap: .6rem;
  padding: .65rem 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-badge { font-size: .6rem; padding: .15rem .45rem; border-radius: 4px; letter-spacing: .06em; text-transform: uppercase; font-weight: 600; }
.badge-ok   { background: rgba(0,229,160,.12); color: var(--accent); border: 1px solid rgba(0,229,160,.25); }
.badge-err  { background: rgba(255,77,109,.12); color: var(--danger); border: 1px solid rgba(255,77,109,.25); }
.badge-idle { background: rgba(100,116,139,.1);  color: var(--muted);  border: 1px solid var(--border); }
.panel-action {
  font-size: .65rem; color: var(--muted); cursor: pointer;
  padding: .2rem .4rem; border-radius: 4px; border: 1px solid transparent;
  transition: all .12s; background: none; font-family: var(--mono);
  display: flex; align-items: center; gap: .3rem;
}
.panel-action:hover { color: var(--text); border-color: var(--border-hi); background: var(--card); }

textarea {
  flex: 1; font-family: var(--mono); font-size: .8rem; line-height: 1.7;
  color: var(--text); background: transparent; border: none; outline: none;
  resize: none; padding: 1rem; tab-size: 2; caret-color: var(--accent); min-height: 360px;
}
textarea::placeholder { color: var(--muted); opacity: .55; }
textarea:focus { background: rgba(0,229,160,.015); }
textarea.output-ta { color: var(--accent); }
textarea.error-ta  { color: var(--danger); }

/* Swap column */
.swap-col { display: flex; flex-direction: column; align-items: center; justify-content: center; padding-top: 3rem; gap: .75rem; }
.swap-btn {
  width: 38px; height: 38px; border-radius: 50%;
  border: 1px solid var(--border-hi); background: var(--surface);
  color: var(--muted); cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  transition: all .15s ease;
}
.swap-btn:hover { border-color: var(--accent); color: var(--accent); background: rgba(0,229,160,.06); transform: rotate(180deg); }

/* File upload zone */
.file-zone {
  margin: .5rem 1rem 1rem;
  border: 1px dashed var(--border-hi);
  border-radius: 8px; padding: .7rem 1rem;
  display: flex; align-items: center; gap: .75rem;
  cursor: pointer; transition: all .15s;
  font-size: .7rem; color: var(--muted);
}
.file-zone:hover { border-color: var(--accent-dim); color: var(--text); background: rgba(0,229,160,.03); }
.file-zone input { display: none; }
.file-zone svg { flex-shrink: 0; opacity: .6; }
.file-zone:hover svg { opacity: 1; }
.file-name { color: var(--accent); font-size: .68rem; margin-left: auto; }

/* Stats */
.stats-bar {
  display: flex; gap: 1.5rem; padding: .7rem 1.5rem;
  border-top: 1px solid var(--border); background: var(--surface);
  flex-wrap: wrap; margin-top: .6rem; border-radius: 10px; align-items: center;
}
.stat { display: flex; align-items: center; gap: .4rem; font-size: .65rem; }
.stat-label { color: var(--muted); letter-spacing: .08em; text-transform: uppercase; }
.stat-val   { color: var(--accent); font-weight: 600; }

.footer-note { font-size: .63rem; color: var(--muted); text-align: center; margin-top: .9rem; 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; }
::-webkit-scrollbar-thumb:hover { background: var(--muted); }

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(12px); }
  to   { opacity: 1; transform: translateY(0); }
}
.page { animation: fadeUp .35s ease both; }

@keyframes spin { to { transform: rotate(360deg); } }


/* ── 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: 210px;
  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; }
}