:root {
  --bg: #f6fbf7;
  --surface: #ffffff;
  --text: #183026;
  --muted: #5b7067;
  --accent: #39a96b;
  --accent-dark: #2f8756;
  --border: #d8e7dc;
  --shadow: 0 10px 30px rgba(27, 80, 54, 0.1);
}

[data-theme="dark"] {
  --bg: #0f1a15;
  --surface: #17261f;
  --text: #e9f7ee;
  --muted: #a5c2b1;
  --accent: #61d694;
  --accent-dark: #4db97d;
  --border: #294238;
  --shadow: 0 12px 35px rgba(0, 0, 0, 0.35);
}

* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: Inter, Segoe UI, Arial, sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
}
a { color: var(--accent-dark); text-decoration: none; }
a:hover { text-decoration: underline; }

.container { max-width: 1120px; margin: 0 auto; padding: 0 1rem; }
.site-header {
  position: sticky; top: 0; z-index: 30;
  background: color-mix(in oklab, var(--surface) 90%, transparent);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(7px);
}
.header-inner { display: flex; align-items: center; justify-content: space-between; padding: .85rem 0; gap: 1rem; }
.brand img { height: 36px; }
.nav-links { display: flex; flex-wrap: wrap; gap: .35rem; }
.nav-links a {
  padding: .45rem .75rem; border-radius: 999px; color: var(--text); font-weight: 600; font-size: .95rem;
}
.nav-links a.active, .nav-links a:hover { background: var(--accent); color: #fff; text-decoration: none; }
.theme-toggle { border: 1px solid var(--border); background: var(--surface); color: var(--text); border-radius: 999px; padding: .45rem .75rem; cursor: pointer; }

.hero { padding: 3.5rem 0 2.5rem; }
.hero h1 { font-size: clamp(1.8rem, 4vw, 3rem); line-height: 1.2; margin: 0 0 1rem; }
.hero p { color: var(--muted); margin: 0; max-width: 800px; }

.grid { display: grid; gap: 1rem; }
.grid-3 { grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); }

.grid-2 { grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); }
.compare-inputs h3, .compare-results h3 { margin: 0 0 .5rem; }
.compare-status { min-height: auto; margin-bottom: 1rem; }
.diff-panel {
  min-height: 320px;
  max-height: 420px;
  overflow: auto;
  padding: 0;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  white-space: pre;
}
.diff-line {
  display: grid;
  grid-template-columns: 56px 1fr;
  border-bottom: 1px solid var(--border);
  min-width: max-content;
}
.diff-line:last-child { border-bottom: 0; }
.diff-line-number {
  padding: .35rem .55rem;
  color: var(--muted);
  border-right: 1px solid var(--border);
  background: color-mix(in oklab, var(--surface) 88%, var(--bg));
}
.diff-line-text { padding: .35rem .55rem; }
.diff-removed { background: rgba(214, 69, 69, 0.16); }
.diff-added { background: rgba(14, 173, 105, 0.18); }
.diff-empty { background: color-mix(in oklab, var(--surface) 75%, var(--bg)); }
.diff-inline { border-radius: 4px; padding: 0 .05rem; }
.diff-inline-remove { background: rgba(214, 69, 69, 0.34); }
.diff-inline-add { background: rgba(14, 173, 105, 0.32); }
.card {
  background: var(--surface); border: 1px solid var(--border); border-radius: 14px; box-shadow: var(--shadow);
  padding: .85rem;
}
.tool-card h3 { font-size: 1rem; margin-bottom: .35rem; }
.tool-card p { margin: 0; font-size: .9rem; color: var(--muted); display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.tool-card .cta { margin-top: .6rem; padding: .42rem .72rem; font-size: .85rem; }
.card h2, .card h3 { margin-top: 0; line-height: 1.25; }
.tool-card .cta { display: inline-block; background: var(--accent); color: #fff; border-radius: 10px; font-weight: 700; }

.section { margin: 1.35rem 0; }
.content-section { background: var(--surface); border: 1px solid var(--border); border-radius: 16px; padding: 1.2rem; margin: 1rem 0; }
.benefits { padding-left: 1.1rem; }

textarea, pre {
  width: 100%; min-height: 220px; border-radius: 12px; border: 1px solid var(--border); background: var(--bg); color: var(--text);
  padding: .9rem; font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
}
.tool-actions { display: flex; flex-wrap: wrap; gap: .6rem; margin: .8rem 0 1rem; }
button {
  border: 0; background: var(--accent); color: #fff; border-radius: 10px; padding: .6rem .95rem; cursor: pointer; font-weight: 700;
}
button.secondary { background: transparent; border: 1px solid var(--border); color: var(--text); }
.output.ok { border-left: 4px solid #0ead69; }
.output.error { border-left: 4px solid #d64545; }
small, .muted { color: var(--muted); }
.compare-diff { white-space: pre-wrap; }
.compare-diff .changed { background: rgba(214, 69, 69, 0.15); padding: 0 .15rem; border-radius: 4px; }

.site-footer { margin-top: 3rem; border-top: 1px solid var(--border); background: var(--surface); }
.footer-inner { padding: 1.5rem 0; display: grid; gap: .9rem; }
.footer-links { display: flex; flex-wrap: wrap; gap: .75rem; font-size: .95rem; }

.tool-menu-toggle {
  display: inline-flex;
  align-items: center;
  gap: .4rem;
  margin: 1rem 0;
}
.tool-menu-toggle .menu-icon {
  font-size: 1rem;
  line-height: 1;
}
.tool-layout { position: relative; display: block; }
.tool-layout .tool-menu-toggle {
  position: sticky;
  top: .7rem;
  z-index: 25;
  width: fit-content;
}

.tool-sidebar {
  position: absolute;
  top: 0;
  left: 0;
  z-index: 20;
  width: min(280px, 85vw);
  max-height: min(70vh, 560px);
  overflow: auto;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: .9rem;
  box-shadow: var(--shadow);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-8px);
  transition: opacity .2s ease, transform .2s ease, visibility .2s;
}
.tool-sidebar-header { font-weight: 800; margin-bottom: .75rem; }
.tool-menu-group + .tool-menu-group { margin-top: .7rem; padding-top: .7rem; border-top: 1px solid var(--border); }
.tool-menu-title { display: block; font-weight: 800; color: var(--text); margin-bottom: .35rem; }
.tool-submenu { display: grid; gap: .25rem; }
.tool-submenu-link { display: block; padding: .38rem .55rem; border-radius: 8px; color: var(--muted); }
.tool-submenu-link:hover, .tool-submenu-link.active { background: var(--accent); color: #fff; text-decoration: none; }
.tool-menu-title.active { color: var(--accent-dark); }
.tool-main-content { min-width: 0; }
.tool-layout.sidebar-open .tool-sidebar {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

@media (max-width: 760px) {
  .header-inner { flex-direction: column; align-items: flex-start; }
  .tool-sidebar {
    width: min(300px, calc(100vw - 2rem));
    max-height: min(65vh, 500px);
  }
}

.compare-page { padding-top: 0; }
.compare-toolbar {
  position: sticky;
  top: .6rem;
  z-index: 12;
  background: color-mix(in oklab, var(--surface) 95%, var(--bg));
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: .8rem;
  margin-bottom: .75rem;
}
.compare-toolbar-group { display: flex; flex-wrap: wrap; gap: .5rem; }
.compare-toolbar-group + .compare-toolbar-group { margin-top: .6rem; }
.compare-toggles label { display: inline-flex; align-items: center; gap: .35rem; font-size: .92rem; color: var(--muted); }
.compare-inline-status {
  border-radius: 10px;
  padding: .55rem .75rem;
  border: 1px solid transparent;
  min-height: 1.2rem;
  margin-bottom: .75rem;
}
.compare-inline-status.ok { border-color: rgba(14,173,105,.4); background: rgba(14,173,105,.08); }
.compare-inline-status.error { border-color: rgba(214,69,69,.45); background: rgba(214,69,69,.1); }
.compare-editors { display: grid; gap: 1rem; grid-template-columns: repeat(2, minmax(0, 1fr)); }
.compare-pane h2 { margin: 0 0 .5rem; font-size: 1.02rem; }
.compare-editor-shell {
  display: grid;
  grid-template-columns: 62px 1fr;
  border: 1px solid var(--border);
  border-radius: 14px;
  overflow: hidden;
  background: var(--bg);
}
.compare-gutter {
  overflow: auto;
  max-height: 62vh;
  background: color-mix(in oklab, var(--surface) 90%, var(--bg));
  border-right: 1px solid var(--border);
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
}
.compare-editor-stack { position: relative; overflow: hidden; }
.compare-overlay,
.compare-input {
  margin: 0;
  font: 13px/1.5 ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  tab-size: 2;
  white-space: pre;
}
.compare-overlay {
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  overflow: auto;
  min-height: 62vh;
  max-height: 62vh;
  color: transparent;
  background: transparent;
}
.compare-input {
  position: relative;
  z-index: 2;
  border: 0;
  background: transparent;
  color: var(--text);
  width: 100%;
  min-height: 62vh;
  max-height: 62vh;
  resize: none;
  overflow: auto;
  border-radius: 0;
}
.cmp-gutter-line,
.cmp-overlay-line {
  height: 1.5em;
  line-height: 1.5em;
}
.cmp-gutter-line {
  display: flex;
  align-items: center;
  padding: 0 .35rem;
  color: var(--muted);
}
.cmp-marker {
  width: 4px;
  height: 1.1em;
  border-radius: 999px;
  margin-right: .4rem;
  background: transparent;
}
.cmp-line-no { font-size: .82rem; }
.cmp-overlay-line { padding: 0 .75rem; }

.cmp-added { background: rgba(14, 173, 105, 0.2); }
.cmp-removed { background: rgba(214, 69, 69, 0.2); }
.cmp-modified { background: rgba(217, 153, 26, 0.2); }
.cmp-gutter-line.cmp-added .cmp-marker { background: #0ead69; }
.cmp-gutter-line.cmp-removed .cmp-marker { background: #d64545; }
.cmp-gutter-line.cmp-modified .cmp-marker { background: #d9991a; }

@media (max-width: 900px) {
  .compare-editors { grid-template-columns: 1fr; }
  .compare-input, .compare-overlay, .compare-gutter { max-height: 46vh; min-height: 46vh; }
}

:root { --accent:#6c5ce7; --accent-dark:#4b3ecf; --bg:#f4f7ff; --surface:#ffffff; --text:#1f2440; --muted:#5a6287; --border:#d9def4; }
.premium-hero { background: linear-gradient(135deg,#eef2ff,#f8f5ff); border:1px solid var(--border); border-radius:20px; padding:2rem; margin-top:1rem; }
.hero-badge { display:inline-block; background:#1f2440; color:#fff; border-radius:999px; padding:.3rem .7rem; font-size:.8rem; margin-bottom:.7rem; }
.hero-banner { margin-top:1rem; }
.split-workspace { display:grid; grid-template-columns:repeat(2,minmax(0,1fr)); gap:.8rem; align-items:start; }
.split-workspace .tool-actions { grid-column: 1 / -1; margin: 0 0 .25rem; }
.split-workspace textarea, .split-workspace pre { min-height:340px; margin:0; }
input, select { border:1px solid var(--border); border-radius:10px; padding:.55rem .65rem; background:var(--surface); color:var(--text); }
@media (max-width:900px){ .split-workspace{grid-template-columns:1fr;} }