*, *::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; gap: .75rem;
  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; 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; }

/* Single UUID hero */
.uuid-hero {
  background: var(--card); border: 1px solid var(--border);
  border-radius: 14px; padding: 1.5rem;
}
.hero-label { font-size: .63rem; letter-spacing: .14em; text-transform: uppercase; color: var(--muted); margin-bottom: .75rem; }
.uuid-display {
  font-family: var(--mono); font-size: clamp(.85rem, 2vw, 1.15rem);
  color: var(--accent); letter-spacing: .04em; word-break: break-all;
  margin-bottom: 1rem; cursor: pointer; transition: color .12s;
}
.uuid-display:hover { color: #00ffb3; }
.hero-actions { display: flex; align-items: center; gap: .6rem; flex-wrap: wrap; }

/* Version tabs */
.version-tabs { display: flex; background: var(--surface); border: 1px solid var(--border); border-radius: 8px; padding: .2rem; gap: .15rem; }
.version-tab {
  padding: .3rem .75rem; border-radius: 6px; border: none;
  background: none; color: var(--muted); font-family: var(--mono);
  font-size: .73rem; cursor: pointer; transition: all .12s; white-space: nowrap;
}
.version-tab.active { background: var(--accent); color: #0d0f14; font-weight: 700; }
.version-tab:not(.active):hover { color: var(--text); }

/* Buttons */
.btn {
  display: inline-flex; align-items: center; gap: .4rem;
  padding: .4rem .9rem; border-radius: 7px; border: none;
  font-family: var(--mono); font-size: .75rem; cursor: pointer;
  transition: all .14s; white-space: nowrap;
}
.btn-primary { background: var(--accent); color: #0d0f14; font-weight: 700; }
.btn-primary:hover { background: #00ffb3; }
.btn-ghost {
  background: none; color: var(--muted);
  border: 1px solid var(--border);
}
.btn-ghost:hover { color: var(--text); border-color: var(--border-hi); background: var(--surface); }

.copy-ok { font-size: .7rem; color: var(--accent); opacity: 0; transition: opacity .2s; }
.copy-ok.show { opacity: 1; }

/* Controls */
.controls {
  background: var(--card); border: 1px solid var(--border);
  border-radius: 12px; padding: 1rem 1.25rem;
  display: flex; flex-wrap: wrap; gap: 1.25rem; align-items: flex-end;
}
.ctrl-group { display: flex; flex-direction: column; gap: .4rem; }
.ctrl-label { font-size: .63rem; letter-spacing: .12em; text-transform: uppercase; color: var(--muted); }

.count-row { display: flex; align-items: center; gap: .6rem; }
input[type=range] {
  -webkit-appearance: none; appearance: none;
  width: 130px; height: 4px;
  background: var(--border); border-radius: 99px; outline: none; cursor: pointer;
}
input[type=range]::-webkit-slider-thumb {
  -webkit-appearance: none; width: 14px; height: 14px;
  border-radius: 50%; background: var(--accent); cursor: pointer; border: none;
}
input[type=range]::-moz-range-thumb {
  width: 14px; height: 14px; border-radius: 50%;
  background: var(--accent); cursor: pointer; border: none;
}
.count-num {
  width: 58px; padding: .32rem .5rem;
  background: var(--surface); border: 1px solid var(--border);
  border-radius: 6px; color: var(--text);
  font-family: var(--mono); font-size: .82rem; outline: none;
  text-align: center; transition: border-color .12s;
}
.count-num:focus { border-color: var(--accent); }

/* Toggle options */
.toggle-row { display: flex; gap: .9rem; flex-wrap: wrap; }
.toggle-label {
  display: flex; align-items: center; gap: .45rem;
  font-size: .73rem; color: var(--muted); cursor: pointer; user-select: none;
}
.toggle-label input { display: none; }
.toggle-box {
  width: 15px; height: 15px; border-radius: 3px;
  border: 1px solid var(--border); background: var(--surface);
  display: flex; align-items: center; justify-content: center; flex-shrink: 0;
  transition: all .12s;
}
.toggle-label input:checked + .toggle-box { background: var(--accent); border-color: var(--accent); }
.toggle-label input:checked + .toggle-box::after {
  content: ''; display: block; width: 7px; height: 4px;
  border-left: 1.8px solid #0d0f14; border-bottom: 1.8px solid #0d0f14;
  transform: rotate(-45deg) translate(1px, -1px);
}

/* Bulk output */
.bulk-panel {
  background: var(--card); border: 1px solid var(--border);
  border-radius: 12px; overflow: hidden; flex: 1; display: flex; flex-direction: column;
  min-height: 300px;
}
.panel-header {
  display: flex; align-items: center; gap: .75rem;
  padding: .6rem 1rem; border-bottom: 1px solid var(--border);
  background: var(--surface); flex-shrink: 0; flex-wrap: wrap;
}
.panel-title { font-size: .65rem; letter-spacing: .14em; text-transform: uppercase; color: var(--muted); flex: 1; }
.panel-actions { display: flex; align-items: center; gap: .5rem; }
.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); }

.uuid-list {
  flex: 1; overflow-y: auto; padding: .5rem;
  display: flex; flex-direction: column; gap: .25rem;
}
.uuid-row {
  display: flex; align-items: center; gap: .75rem;
  padding: .5rem .75rem; border-radius: 7px;
  border: 1px solid transparent; transition: border-color .12s, background .12s;
  cursor: pointer;
}
.uuid-row:hover { border-color: var(--border); background: var(--surface); }
.uuid-idx { font-size: .62rem; color: var(--muted); min-width: 2rem; }
.uuid-val { font-size: .8rem; color: var(--text); flex: 1; word-break: break-all; letter-spacing: .03em; }
.uuid-copy-hint { font-size: .6rem; color: var(--muted); opacity: 0; transition: opacity .12s; white-space: nowrap; }
.uuid-row:hover .uuid-copy-hint { opacity: 1; }

/* 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: 640px) {
  .uuid-display { font-size: .75rem; }
  input[type=range] { width: 100px; }
}

/* ── 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; } }