*, *::before, *::after{ box-sizing: border-box; }
html{ scroll-behavior: smooth; }
body{
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: 'Inter', sans-serif;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
p{ margin: 0; }
h1,h2,h3{
  font-family: 'Inter', sans-serif;
  font-weight: 600;
  letter-spacing: -0.01em;
  margin: 0;
}
.mono{ font-family: 'JetBrains Mono', monospace; }
a{ color: inherit; text-decoration: none; }
.wrap{ max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }

:root{
  --ink:        #071120;
  --ink-dim:    #51606F;
  --signal:     #00C896;
  --signal-soft: rgba(0,200,150,0.12);
  --surface:    #F5F7F9;
  --paper:      #ffffff;
  --border:     #E2E7EC;
  --alert:     #E14F4F;
  --maxw:       1180px;
}

/* ---------- BUTTONS ---------- */
button, .btn{
  font-family: 'Inter', sans-serif;
  font-weight: 600;
  font-size: 15px;
  border: none;
  border-radius: 6px;
  padding: 13px 24px;
  cursor: pointer;
  transition: transform 0.15s ease, opacity 0.15s ease;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
button:hover, .btn:hover{ opacity: 0.88; }
button:active, .btn:active{ transform: translateY(1px); }
button:focus-visible, .btn:focus-visible, a:focus-visible{
  outline: 2px solid var(--signal);
  outline-offset: 3px;
}
.btn-primary{ background: var(--signal); color: var(--ink); }

/* ---------- NAV ---------- */
nav{
  display: flex; align-items: center;
  justify-content: space-between;
  padding: 20px 0; position: relative;
}
.brand{
  font-family: 'Inter', sans-serif; font-weight: 700;
  font-size: 19px; letter-spacing: -0.01em;
  color: var(--signal); cursor: pointer;
  transition: opacity 0.25s ease; width: fit-content;
}
.brand:hover{ opacity: 0.85; }
nav .links{ display: flex; gap: 28px; font-size: 14px; color: var(--ink-dim); }
nav .links a:hover{ color: var(--ink); }
nav .links a.active{ color: var(--signal) !important; font-weight: 600; }
.nav-right{ display: flex; align-items: center; gap: 14px; }
.nav-toggle{
  display: none; background: transparent;
  border: 1px solid var(--border); padding: 9px;
  flex-direction: column; gap: 4px;
}
.nav-toggle span{ width: 18px; height: 2px; background: var(--ink); display: block; }

/* ---------- EYEBROW ---------- */
.eyebrow{
  font-family: 'JetBrains Mono', monospace;
  font-size: 12px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--signal);
  margin-bottom: 14px;
  display: flex;
  align-items: center;
  gap: 8px;
}

/* ---------- DISCLAIMER ---------- */
.disclaimer{
  background: var(--surface);
  border-top: 1px solid var(--border);
  padding: 20px 0;
}
.disclaimer {
  text-align: center;
}
.disclaimer p{
  font-size: 12.5px; color: var(--ink-dim);
  line-height: 1.55; margin: 0 auto; max-width: 720px;
}

/* ---------- PAGE HEADER ---------- */
.page-header{ padding: 56px 0 40px; border-bottom: 1px solid var(--border); }
.page-header h1{ font-size: 36px; margin: 8px 0 12px; color: var(--ink); }
.page-header p{ font-size: 15.5px; color: var(--ink-dim); max-width: 560px; }

/* ---------- SEARCH ---------- */
.tools-search-section{ padding: 28px 0; border-bottom: 1px solid var(--border); }
.tools-search-wrap{
  display: flex; align-items: center; gap: 10px;
  background: var(--surface); border: 1px solid var(--border);
  border-radius: 10px; padding: 12px 18px; max-width: 480px;
}
.tools-search-wrap svg{ width: 18px; height: 18px; color: var(--ink-dim); flex-shrink: 0; }
.tools-search-wrap input{
  border: none; background: transparent; font-size: 14px;
  color: var(--ink); width: 100%; outline: none;
}
.tools-search-wrap input::placeholder{ color: var(--ink-dim); }

/* ---------- SHELL ---------- */
.tools-shell-section{ padding: 40px 0 72px; }
.tools-shell{
  display: grid; grid-template-columns: 200px 1fr;
  gap: 48px; align-items: start;
}
.tools-sidenav{
  position: sticky; top: 24px;
  display: flex; flex-direction: column; gap: 4px;
}
.tools-sidenav a{
  font-size: 13.5px; color: var(--ink-dim);
  padding: 9px 12px; border-radius: 7px; font-weight: 500;
}
.tools-sidenav a:hover{ background: var(--surface); color: var(--ink); }
.tools-main{ min-width: 0; }

/* ---------- CATEGORY ---------- */
.tool-category{ padding-bottom: 56px; scroll-margin-top: 24px; }
.tool-category-head{
  display: flex; align-items: flex-start; gap: 14px;
  margin-bottom: 20px; padding-bottom: 18px;
  border-bottom: 1px solid var(--border);
}
.tool-category-head svg{
  width: 24px; height: 24px; color: var(--signal);
  flex-shrink: 0; margin-top: 2px;
}
.tool-category-head h2{ font-size: 21px; color: var(--ink); margin: 0 0 4px; }
.tool-category-head p{ font-size: 13.5px; color: var(--ink-dim); margin: 0; }

/* ---------- TOOL ROWS ---------- */
.tool-list{ display: flex; flex-direction: column; }
.tool-row{ border-bottom: 1px solid var(--border); }
.tool-row.hidden{ display: none; }
.tool-row-head{
  width: 100%; display: flex; align-items: center; gap: 16px;
  background: transparent; border: none; padding: 16px 4px;
  cursor: pointer; text-align: left; font-family: 'Inter', sans-serif;
}
.tool-row-static{ cursor: default; }
.tool-row-main{ flex: 1; }
.tool-row-main h3{ font-size: 15px; color: var(--ink); margin: 0 0 4px; font-weight: 600; }
.tool-row-main p{ font-size: 13px; color: var(--ink-dim); margin: 0; }
.status-badge{
  font-family: 'JetBrains Mono', monospace; font-size: 11px;
  font-weight: 600; text-transform: uppercase;
  letter-spacing: 0.03em; padding: 4px 10px;
  border-radius: 20px; white-space: nowrap; flex-shrink: 0;
}
.status-badge.available{ background: var(--signal-soft); color: var(--ink); }
.status-badge.development{ background: var(--surface); color: var(--ink-dim); border: 1px solid var(--border); }
.row-chev{
  width: 16px; height: 16px; color: var(--ink-dim);
  flex-shrink: 0; transition: transform 0.2s ease;
}
.tool-row.open .row-chev{ transform: rotate(180deg); color: var(--signal); }

/* ---------- PANEL ---------- */
.tool-panel{ max-height: 0; overflow: hidden; transition: max-height 0.25s ease; }
.tool-row.open .tool-panel{ max-height: 420px; }
.tool-panel-inner{ padding: 4px 4px 28px; }
.tool-grid{
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: 16px; margin-bottom: 18px;
}
.tool-grid label{ display: block; font-size: 12.5px; color: var(--ink-dim); }
.tool-grid input{
  display: block; width: 100%; margin-top: 6px;
  background: var(--surface); border: 1px solid var(--border);
  border-radius: 6px; padding: 9px 12px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 13.5px; color: var(--ink);
}
.tool-grid input:focus-visible{ outline: 2px solid var(--signal); outline-offset: 1px; }
.conv-input-wrap select{
  display: block; width: 100%; margin-top: 6px;
  background: var(--surface); border: 1px solid var(--border);
  border-radius: 6px; padding: 9px 12px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 13.5px; color: var(--ink);
  cursor: pointer; appearance: auto;
}
.conv-input-wrap select:focus-visible{ outline: 2px solid var(--signal); outline-offset: 1px; }
.conv-quick{
  display: flex; gap: 4px; margin-top: 6px; flex-wrap: wrap;
}
.conv-quick-btn{
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px; font-weight: 600; padding: 3px 8px;
  background: var(--surface); border: 1px solid var(--border);
  border-radius: 4px; color: var(--ink-dim); cursor: pointer;
  transition: all 0.15s ease;
}
.conv-quick-btn:hover{
  background: var(--signal-soft); border-color: var(--signal); color: var(--ink);
}
.tool-btn{ font-size: 13.5px; padding: 10px 20px; }
.tool-result{
  margin-top: 18px; border-top: 1px solid var(--border);
  padding-top: 14px;
}
.result-row{
  display: flex; justify-content: space-between; align-items: baseline;
  padding: 5px 0; font-size: 13.5px; color: var(--ink-dim);
}
.result-row strong{
  font-family: 'JetBrains Mono', monospace;
  font-size: 15px; color: var(--signal);
}
.no-results-tools{
  text-align: center; color: var(--ink-dim);
  font-size: 14px; padding: 48px 0;
}

/* ---------- RESPONSIVE ---------- */
@media (max-width: 860px){
  nav .links{
    display: none; position: absolute; top: 100%; left: 0; right: 0;
    background: var(--paper); border: 1px solid var(--border);
    border-radius: 10px;
    box-shadow: 0 8px 20px rgba(7,17,32,0.08);
    flex-direction: column; gap: 0; padding: 8px; z-index: 20;
  }
  nav .links.open{ display: flex; }
  nav .links a{ padding: 12px 14px; border-radius: 6px; }
  nav .links a:hover{ background: var(--surface); }
  .nav-toggle{ display: flex; }
  footer .foot-row{ grid-template-columns: 1fr 1fr; gap: 30px; }
}

@media (max-width: 900px){
  .tools-shell{ grid-template-columns: 1fr; }
  .tools-sidenav{
    position: static; flex-direction: row; overflow-x: auto;
    gap: 8px; padding-bottom: 8px;
    border-bottom: 1px solid var(--border); margin-bottom: 24px;
  }
  .tools-sidenav a{ white-space: nowrap; }
  .tool-grid{ grid-template-columns: 1fr 1fr; }
}
@media (max-width: 560px){
  .tool-grid{ grid-template-columns: 1fr; }
  .tool-row-head{ flex-wrap: wrap; }
}