*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
:root {
  --bg-primary:   #0a0a0f;
  --bg-secondary: #12121a;
  --bg-card:      #16161f;
  --bg-input:     #1a1a25;
  --border:       #2a2a3a;
  --border-glow:  #6c63ff40;
  --text-primary: #e8e8f0;
  --text-secondary: #8888a0;
  --text-muted:   #555570;
  --accent:       #6c63ff;
  --accent-hover: #7f78ff;
  --accent-glow:  #6c63ff30;
  --green:        #22c55e;
  --red:          #ef4444;
  --orange:       #f59e0b;
  --cyan:         #06b6d4;
  --pink:         #ec4899;
  --yellow:       #eab308;
  --radius:       12px;
  --radius-sm:    8px;
  --font-mono:    'SF Mono', 'Cascadia Code', 'Fira Code', 'JetBrains Mono', monospace;
  --font-sans:    'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --transition:   all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}
body {
  font-family: var(--font-sans);
  background: var(--bg-primary);
  color: var(--text-primary);
  min-height: 100vh;
  overflow-x: hidden;
}
/* ─── Background Glow ─────────────────────────────────── */
.bg-glow { position: fixed; inset: 0; z-index: -1; overflow: hidden; }
.bg-glow::before, .bg-glow::after {
  content: ''; position: absolute; width: 600px; height: 600px;
  border-radius: 50%; filter: blur(120px); opacity: 0.07;
  animation: float 20s ease-in-out infinite;
}
.bg-glow::before { background: var(--accent); top: -200px; left: -100px; }
.bg-glow::after { background: var(--pink); bottom: -200px; right: -100px; animation-delay: -10s; }
@keyframes float {
  0%, 100% { transform: translate(0, 0) scale(1); }
  33% { transform: translate(100px, 50px) scale(1.1); }
  66% { transform: translate(-50px, -30px) scale(0.95); }
}
/* ─── Particles ─────────────────────────────────────── */
.particles { position: fixed; inset: 0; z-index: -1; pointer-events: none; }
.particle {
  position: absolute; width: 2px; height: 2px;
  background: var(--accent); border-radius: 50%; opacity: 0;
  animation: particle-float 15s linear infinite;
}
@keyframes particle-float {
  0% { opacity: 0; transform: translateY(100vh) scale(0); }
  10% { opacity: 0.6; }
  90% { opacity: 0.6; }
  100% { opacity: 0; transform: translateY(-10vh) scale(1); }
}
/* ─── Header ──────────────────────────────────────────── */
header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(10, 10, 15, 0.85);
  backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  padding: 0 24px;
}
.header-inner {
  max-width: 1400px; margin: 0 auto;
  display: flex; align-items: center; justify-content: space-between;
  height: 64px; gap: 16px;
}
.logo {
  font-size: 1.35rem; font-weight: 800;
  background: linear-gradient(135deg, var(--accent), var(--pink));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
  cursor: pointer; letter-spacing: -0.5px; white-space: nowrap;
}
.logo span { opacity: 0.5; font-weight: 400; }
.search-bar {
  flex: 1; max-width: 400px; position: relative;
}
.search-bar input {
  width: 100%; background: var(--bg-input); border: 1px solid var(--border);
  border-radius: 24px; color: var(--text-primary);
  padding: 8px 16px 8px 36px; font-size: 0.85rem;
  transition: var(--transition); outline: none; font-family: var(--font-sans);
}
.search-bar input:focus { border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-glow); }
.search-bar i { position: absolute; left: 12px; top: 50%; transform: translateY(-50%); color: var(--text-muted); font-size: 0.8rem; }
.header-actions { display: flex; gap: 8px; align-items: center; }
.header-actions button {
  background: var(--bg-input); border: 1px solid var(--border); color: var(--text-secondary);
  width: 36px; height: 36px; border-radius: 50%; cursor: pointer;
  transition: var(--transition); display: flex; align-items: center; justify-content: center;
  font-size: 0.85rem;
}
.header-actions button:hover { border-color: var(--accent); color: var(--accent); }
/* ─── Main ────────────────────────────────────────────── */
main { max-width: 1400px; margin: 0 auto; padding: 32px 24px 80px; }
.page { display: none; animation: fadeIn 0.35s ease; }
.page.active { display: block; }
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: translateY(0); }
}
/* ─── Hero ────────────────────────────────────────────── */
.hero { text-align: center; padding: 60px 0 48px; }
.hero h1 {
  font-size: clamp(2.2rem, 5vw, 3.5rem);
  font-weight: 800; letter-spacing: -1.5px; line-height: 1.1; margin-bottom: 14px;
}
.hero h1 .gradient {
  background: linear-gradient(135deg, var(--accent), var(--cyan), var(--pink));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
}
.hero p { color: var(--text-secondary); font-size: 1.1rem; max-width: 520px; margin: 0 auto 12px; line-height: 1.6; }
.hero .stats {
  display: flex; gap: 32px; justify-content: center; margin-top: 20px;
}
.hero .stat { text-align: center; }
.hero .stat-num { font-size: 1.8rem; font-weight: 800; color: var(--accent); }
.hero .stat-label { font-size: 0.75rem; color: var(--text-muted); text-transform: uppercase; letter-spacing: 1px; }
/* ─── Category Tabs ───────────────────────────────────── */
.categories { display: flex; gap: 6px; flex-wrap: wrap; justify-content: center; margin-bottom: 28px; }
.cat-btn {
  background: var(--bg-input); border: 1px solid var(--border); color: var(--text-secondary);
  padding: 6px 16px; border-radius: 20px; font-size: 0.8rem; font-weight: 500;
  cursor: pointer; transition: var(--transition); font-family: var(--font-sans);
}
.cat-btn:hover { border-color: var(--accent); color: var(--text-primary); }
.cat-btn.active { background: var(--accent-glow); border-color: var(--accent); color: var(--accent); }
/* ─── Tools Grid ──────────────────────────────────────── */
.tools-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 16px;
}
.tool-card {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 24px; cursor: pointer;
  transition: var(--transition); position: relative; overflow: hidden;
}
.tool-card::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0; height: 3px;
  opacity: 0; transition: var(--transition);
}
.tool-card:hover {
  border-color: var(--border-glow); transform: translateY(-3px);
  box-shadow: 0 16px 32px rgba(0,0,0,0.3), 0 0 20px var(--accent-glow);
}
.tool-card:hover::before { opacity: 1; }
.tool-card .tc-top { display: flex; align-items: center; gap: 12px; margin-bottom: 10px; }
.tool-card .icon {
  width: 42px; height: 42px; border-radius: var(--radius-sm);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.1rem; flex-shrink: 0;
}
.tool-card h3 { font-size: 1rem; font-weight: 700; }
.tool-card p { color: var(--text-secondary); font-size: 0.82rem; line-height: 1.5; }
.tool-card .tag {
  display: inline-block; padding: 2px 8px; border-radius: 20px;
  font-size: 0.65rem; font-weight: 600; text-transform: uppercase; letter-spacing: 0.5px;
  margin-left: auto;
}
/* Icon colors */
.ic-purple { background: #6c63ff15; color: var(--accent); }
.ic-green  { background: #22c55e15; color: var(--green); }
.ic-red    { background: #ef444415; color: var(--red); }
.ic-cyan   { background: #06b6d415; color: var(--cyan); }
.ic-orange { background: #f59e0b15; color: var(--orange); }
.ic-pink   { background: #ec489915; color: var(--pink); }
.ic-yellow { background: #eab30815; color: var(--yellow); }
/* Gradient bars */
[data-cat="format"]::before  { background: linear-gradient(90deg, var(--accent), var(--cyan)); }
[data-cat="encode"]::before  { background: linear-gradient(90deg, var(--green), var(--cyan)); }
[data-cat="generate"]::before{ background: linear-gradient(90deg, var(--orange), var(--yellow)); }
[data-cat="text"]::before    { background: linear-gradient(90deg, var(--pink), var(--accent)); }
[data-cat="web"]::before     { background: linear-gradient(90deg, var(--cyan), var(--green)); }
[data-cat="dev"]::before     { background: linear-gradient(90deg, var(--red), var(--orange)); }
.tag-purple { background: #6c63ff20; color: var(--accent); }
.tag-green  { background: #22c55e20; color: var(--green); }
.tag-red    { background: #ef444420; color: var(--red); }
.tag-cyan   { background: #06b6d420; color: var(--cyan); }
.tag-orange { background: #f59e0b20; color: var(--orange); }
.tag-pink   { background: #ec489920; color: var(--pink); }
.tag-yellow { background: #eab30820; color: var(--yellow); }
/* ─── Section Header / Back ───────────────────────────── */
.section-header { margin-bottom: 24px; }
.section-header h2 { font-size: 1.6rem; font-weight: 800; letter-spacing: -0.5px; margin-bottom: 4px; }
.section-header p { color: var(--text-secondary); font-size: 0.9rem; }
.back-btn {
  background: transparent; border: 1px solid var(--border);
  color: var(--text-secondary); padding: 6px 14px; border-radius: var(--radius-sm);
  cursor: pointer; font-size: 0.8rem; margin-bottom: 16px;
  transition: var(--transition); font-family: var(--font-sans);
}
.back-btn:hover { border-color: var(--accent); color: var(--accent); }
/* ─── Form Controls ───────────────────────────────────── */
textarea, input[type="text"], input[type="url"], input[type="number"], input[type="password"], select {
  width: 100%; background: var(--bg-input); border: 1px solid var(--border);
  border-radius: var(--radius-sm); color: var(--text-primary);
  padding: 12px 16px; font-family: var(--font-mono); font-size: 0.85rem;
  transition: var(--transition); outline: none;
}
textarea:focus, input:focus, select:focus {
  border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-glow);
}
textarea { resize: vertical; min-height: 180px; line-height: 1.6; }
input[type="color"] {
  width: 60px; height: 42px; border: 1px solid var(--border);
  border-radius: var(--radius-sm); background: var(--bg-input);
  cursor: pointer; padding: 4px;
}
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 10px 20px; border: none; border-radius: var(--radius-sm);
  font-family: var(--font-sans); font-size: 0.85rem; font-weight: 600;
  cursor: pointer; transition: var(--transition); white-space: nowrap;
}
.btn-primary { background: var(--accent); color: white; }
.btn-primary:hover { background: var(--accent-hover); box-shadow: 0 4px 20px var(--accent-glow); }
.btn-secondary { background: var(--bg-input); color: var(--text-secondary); border: 1px solid var(--border); }
.btn-secondary:hover { border-color: var(--accent); color: var(--text-primary); }
.btn-green { background: var(--green); color: white; }
.btn-green:hover { background: #16a34a; }
.btn-red { background: var(--red); color: white; }
.btn-red:hover { background: #dc2626; }
.btn-cyan { background: var(--cyan); color: white; }
.btn-cyan:hover { background: #0891b2; }
.btn-orange { background: var(--orange); color: #000; }
.btn-orange:hover { background: #d97706; }
.btn-pink { background: var(--pink); color: white; }
.btn-pink:hover { background: #db2777; }
.btn-sm { padding: 6px 14px; font-size: 0.78rem; }
.btn-group { display: flex; gap: 8px; flex-wrap: wrap; margin: 14px 0; }
/* ─── Panels ──────────────────────────────────────────── */
.split-panel { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.panel-label {
  font-size: 0.72rem; font-weight: 600; text-transform: uppercase;
  letter-spacing: 1px; color: var(--text-muted); margin-bottom: 8px;
}
/* ─── Result Cards ────────────────────────────────────── */
.result-card {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 20px; margin-top: 16px;
}
.result-row {
  display: flex; justify-content: space-between; align-items: center;
  padding: 10px 14px; background: var(--bg-input);
  border-radius: var(--radius-sm); margin-bottom: 6px;
  border: 1px solid var(--border);
}
.result-row .label { font-size: 0.72rem; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.5px; }
.result-row .value {
  font-family: var(--font-mono); font-size: 0.82rem; color: var(--cyan);
  word-break: break-all; cursor: pointer; text-align: right; max-width: 70%;
}
.result-row .value:hover { color: var(--accent); }
/* ─── Status ──────────────────────────────────────────── */
.status {
  padding: 10px 14px; border-radius: var(--radius-sm); font-size: 0.82rem;
  margin-top: 10px; display: none; font-family: var(--font-mono);
}
.status.success { display: block; background: #22c55e12; border: 1px solid #22c55e30; color: var(--green); }
.status.error   { display: block; background: #ef444412; border: 1px solid #ef444430; color: var(--red); }
.status.info    { display: block; background: #6c63ff12; border: 1px solid #6c63ff30; color: var(--accent); }
.status.warning { display: block; background: #f59e0b12; border: 1px solid #f59e0b30; color: var(--orange); }
/* ─── Short URL ───────────────────────────────────────── */
.short-url-result { display: none; margin-top: 16px; }
.short-url-result.visible { display: block; animation: fadeIn 0.35s ease; }
.short-url-display {
  display: flex; align-items: center; gap: 12px;
  background: var(--bg-input); border: 1px solid var(--accent);
  border-radius: var(--radius-sm); padding: 14px 16px; margin: 10px 0;
}
.short-url-display a { flex: 1; color: var(--accent); font-family: var(--font-mono); font-size: 0.9rem; text-decoration: none; }
.short-url-display a:hover { text-decoration: underline; }
/* ─── YouTube Card ────────────────────────────────────── */
.yt-result { display: none; overflow: hidden; margin-top: 16px; }
.yt-result.visible { display: block; animation: fadeIn 0.35s ease; }
.yt-thumb { width: 100%; aspect-ratio: 16/9; object-fit: cover; display: block; border-radius: var(--radius) var(--radius) 0 0; }
.yt-info { padding: 20px; background: var(--bg-card); border: 1px solid var(--border); border-top: 0; border-radius: 0 0 var(--radius) var(--radius); }
.yt-info h3 { font-size: 1.1rem; margin-bottom: 6px; line-height: 1.4; }
.yt-info .author { color: var(--text-secondary); font-size: 0.85rem; margin-bottom: 14px; }
.yt-info .author a { color: var(--accent); text-decoration: none; }
.yt-links { display: flex; gap: 8px; flex-wrap: wrap; }
/* ─── Color Preview ───────────────────────────────────── */
.color-preview-box {
  width: 100%; height: 120px; border-radius: var(--radius);
  border: 1px solid var(--border); margin-bottom: 16px;
  transition: background 0.3s ease;
}
/* ─── Checkbox & Toggle ───────────────────────────────── */
.checkbox-group { display: flex; flex-wrap: wrap; gap: 16px; margin: 12px 0; }
.checkbox-group label {
  display: flex; align-items: center; gap: 6px; font-size: 0.85rem;
  color: var(--text-secondary); cursor: pointer;
}
.checkbox-group input[type="checkbox"] {
  width: 16px; height: 16px; accent-color: var(--accent); cursor: pointer;
}
/* ─── Password Display ────────────────────────────────── */
.pw-display {
  font-family: var(--font-mono); font-size: 1.1rem;
  padding: 16px; background: var(--bg-input);
  border: 1px solid var(--border); border-radius: var(--radius-sm);
  word-break: break-all; cursor: pointer;
  transition: var(--transition); margin: 12px 0;
}
.pw-display:hover { border-color: var(--accent); }
/* ─── Strength Meter ──────────────────────────────────── */
.strength-bar { height: 4px; border-radius: 2px; background: var(--border); margin-top: 8px; overflow: hidden; }
.strength-bar-fill { height: 100%; border-radius: 2px; transition: all 0.3s ease; }
/* ─── Markdown Preview ────────────────────────────────── */
.md-preview {
  background: var(--bg-input); border: 1px solid var(--border);
  border-radius: var(--radius-sm); padding: 20px; min-height: 180px;
  line-height: 1.7; font-size: 0.9rem; overflow-y: auto; max-height: 600px;
}
.md-preview h1, .md-preview h2, .md-preview h3 { margin: 16px 0 8px; color: var(--text-primary); }
.md-preview h1 { font-size: 1.5rem; border-bottom: 1px solid var(--border); padding-bottom: 8px; }
.md-preview h2 { font-size: 1.25rem; }
.md-preview h3 { font-size: 1.1rem; }
.md-preview p { margin-bottom: 10px; color: var(--text-secondary); }
.md-preview code {
  background: #1e1e2e; padding: 2px 6px; border-radius: 4px;
  font-family: var(--font-mono); font-size: 0.82rem; color: var(--cyan);
}
.md-preview pre { background: #1e1e2e; padding: 14px; border-radius: var(--radius-sm); margin: 10px 0; overflow-x: auto; }
.md-preview pre code { background: none; padding: 0; }
.md-preview ul, .md-preview ol { padding-left: 24px; margin-bottom: 10px; color: var(--text-secondary); }
.md-preview blockquote { border-left: 3px solid var(--accent); padding-left: 14px; margin: 10px 0; color: var(--text-muted); font-style: italic; }
.md-preview a { color: var(--accent); }
.md-preview strong { color: var(--text-primary); }
.md-preview hr { border: none; border-top: 1px solid var(--border); margin: 16px 0; }
/* ─── Diff View ───────────────────────────────────────── */
.diff-output { font-family: var(--font-mono); font-size: 0.82rem; margin-top: 16px; }
.diff-line { padding: 4px 12px; border-radius: 2px; margin: 1px 0; }
.diff-add { background: #22c55e10; color: var(--green); }
.diff-del { background: #ef444410; color: var(--red); }
.diff-same { color: var(--text-muted); }
/* ─── Regex Matches ───────────────────────────────────── */
.regex-match { background: var(--accent-glow); border: 1px solid var(--accent); border-radius: 3px; padding: 0 2px; }
/* ─── IP Info ─────────────────────────────────────────── */
.ip-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); gap: 10px; }
.ip-card {
  background: var(--bg-input); border: 1px solid var(--border);
  border-radius: var(--radius-sm); padding: 14px;
}
.ip-card .label { font-size: 0.7rem; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.5px; margin-bottom: 4px; }
.ip-card .value { font-family: var(--font-mono); font-size: 0.9rem; color: var(--cyan); }
/* ─── QR Code ─────────────────────────────────────────── */
#qrCanvas { display: inline-block; }
/* ─── Footer ──────────────────────────────────────────── */
footer {
  text-align: center; padding: 28px 24px; color: var(--text-muted);
  font-size: 0.78rem; border-top: 1px solid var(--border);
}
footer a { color: var(--accent); text-decoration: none; }
/* ─── Scrollbar ───────────────────────────────────────── */
::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: var(--bg-primary); }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-muted); }
::selection { background: var(--accent); color: white; }
/* ─── Toast ───────────────────────────────────────────── */
.copy-toast {
  position: fixed; bottom: 30px; left: 50%; transform: translateX(-50%);
  background: var(--accent); color: white; padding: 10px 24px;
  border-radius: 30px; font-size: 0.85rem; font-weight: 600;
  opacity: 0; pointer-events: none; transition: opacity 0.3s ease; z-index: 999;
}
.copy-toast.show { opacity: 1; }
/* ─── Responsive ──────────────────────────────────────── */
@media (max-width: 768px) {
  .split-panel { grid-template-columns: 1fr; }
  .search-bar { display: none; }
  .tools-grid { grid-template-columns: 1fr; }
  .ip-grid { grid-template-columns: 1fr; }
}
/* ─── Slider ──────────────────────────────────────────── */
input[type="range"] {
  -webkit-appearance: none; width: 100%; height: 6px;
  background: var(--border); border-radius: 3px; outline: none;
}
input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none; width: 18px; height: 18px;
  border-radius: 50%; background: var(--accent); cursor: pointer;
  box-shadow: 0 0 8px var(--accent-glow);
}
.hidden { display: none !important; }
/* ─── API Usage Section ───────────────────────────────── */
.api-usage {
  margin-top: 24px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}
.api-usage-toggle {
  width: 100%;
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 18px;
  background: var(--bg-card);
  border: none; color: var(--text-secondary);
  cursor: pointer; font-family: var(--font-sans);
  font-size: 0.82rem; font-weight: 600;
  transition: var(--transition);
}
.api-usage-toggle:hover { color: var(--text-primary); background: var(--bg-input); }
.api-usage-toggle i { transition: transform 0.25s ease; }
.api-usage-toggle.open i { transform: rotate(180deg); }
.api-usage-toggle .badge {
  background: var(--accent-glow); color: var(--accent);
  padding: 2px 8px; border-radius: 10px; font-size: 0.68rem;
  font-weight: 700; text-transform: uppercase; letter-spacing: 0.5px;
  margin-left: 8px;
}
.api-usage-body {
  display: none; padding: 18px;
  background: var(--bg-primary);
  border-top: 1px solid var(--border);
}
.api-usage-body.open { display: block; animation: fadeIn 0.25s ease; }
.api-usage-body .api-endpoint {
  margin-bottom: 18px;
}
.api-usage-body .api-endpoint:last-child { margin-bottom: 0; }
.api-method {
  display: inline-block;
  padding: 2px 8px; border-radius: 4px;
  font-size: 0.7rem; font-weight: 700;
  font-family: var(--font-mono);
  margin-right: 6px;
}
.api-method.post { background: #22c55e20; color: var(--green); }
.api-method.get { background: #06b6d420; color: var(--cyan); }
.api-path {
  font-family: var(--font-mono); font-size: 0.82rem;
  color: var(--text-primary);
}
.api-desc {
  font-size: 0.78rem; color: var(--text-muted);
  margin: 4px 0 8px; line-height: 1.4;
}
.api-code {
  background: #0d0d14;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 14px 16px;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  color: var(--text-secondary);
  line-height: 1.65;
  overflow-x: auto;
  white-space: pre;
  position: relative;
}
.api-code .kw { color: var(--pink); }
.api-code .str { color: var(--green); }
.api-code .cm { color: var(--text-muted); font-style: italic; }
.api-code .fn { color: var(--cyan); }
.api-code .var { color: var(--orange); }
.api-code-copy {
  position: absolute; top: 8px; right: 8px;
  background: var(--bg-input); border: 1px solid var(--border);
  color: var(--text-muted); border-radius: 4px;
  padding: 3px 8px; font-size: 0.68rem; cursor: pointer;
  transition: var(--transition); font-family: var(--font-sans);
}
.api-code-copy:hover { color: var(--accent); border-color: var(--accent); }
.api-baseurl-note {
  background: var(--bg-input); border: 1px solid var(--border);
  border-radius: var(--radius-sm); padding: 10px 14px;
  font-size: 0.76rem; color: var(--text-muted);
  margin-bottom: 14px; line-height: 1.5;
}
.api-baseurl-note code {
  background: #0d0d14; padding: 1px 6px; border-radius: 3px;
  font-family: var(--font-mono); color: var(--accent); font-size: 0.74rem;
}