/* Base = Dark mode; Light overrides under .light */
:root{
  /* Dark neutrals */
  --bg: #0f1218;
  --text: #eef2f8;
  --muted:#a7b0c2;
  --panel:#151a23;
  --panel-2:#0f131b;
  --border: #273244;
  --ring:#60a5fa;
  /* Accent */
  --accent:#3b82f6;
  --accent-2:#2563eb;
  --success:#22c55e;
  --warning:#f59e0b;
  --danger:#ef4444;
  --shadow: 0 16px 40px rgba(0,0,0,.45);
}

:root.light{
  /* Light neutrals */
  --bg: #f6f8fb;
  --text: #171a21;
  --muted:#5f6b7e;
  --panel:#ffffff;
  --panel-2:#f2f5f9;
  --border: #e2e7ef;
  --ring:#3b82f6;
  /* Accent */
  --accent:#2563eb;
  --accent-2:#1d4ed8;
  --success:#16a34a;
  --warning:#d97706;
  --danger:#dc2626;
  --shadow: 0 12px 30px rgba(16,24,40,.08);
}

*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;
  font: 15.5px/1.65 Inter, ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial;
  color:var(--text);
  background:
    radial-gradient(900px 500px at 10% -10%, rgba(59,130,246,.12), transparent 60%),
    radial-gradient(800px 500px at 90% -10%, rgba(99,102,241,.10), transparent 60%),
    var(--bg);
}
:root.light body{
  background:
    radial-gradient(900px 500px at 10% -10%, rgba(37,99,235,.07), transparent 60%),
    radial-gradient(800px 500px at 90% -10%, rgba(99,102,241,.06), transparent 60%),
    var(--bg);
}
a{color:inherit;text-decoration:none}
.skip-link{position:absolute;left:-9999px;top:auto;width:1px;height:1px;overflow:hidden}
.skip-link:focus{left:10px;top:10px;width:auto;height:auto;background:#000;color:#fff;padding:6px 10px;border-radius:8px;z-index:999}

/* Header */
.banner{
  display:flex;align-items:flex-start;justify-content:space-between;gap:12px;
  padding:16px 20px;border-bottom:1px solid var(--border);background: color-mix(in oklab, var(--panel) 80%, transparent);
  backdrop-filter: blur(8px);
  position:sticky;top:0;z-index:20;
}
.gradient-text{
  font-size: clamp(22px, 3vw, 30px);
  background: linear-gradient(90deg,color-mix(in oklab, var(--text) 92%, transparent), color-mix(in oklab, var(--muted) 40%, transparent));
  -webkit-background-clip:text;background-clip:text;color:transparent;margin:0;font-weight:800;letter-spacing:.2px;
}
.subtitle{margin:.35rem 0 0;color:var(--muted);font-size:.95rem}
.badges{display:flex;gap:8px;margin-top:8px;flex-wrap:wrap}
.badge{border:1px solid var(--border);padding:5px 10px;border-radius:999px;font-size:.78rem;background:var(--panel)}

.header-actions{display:flex;gap:8px}
.btn{
  display:inline-flex;align-items:center;gap:8px;
  border:1px solid var(--border);background:var(--panel);color:var(--text);
  padding:8px 10px;border-radius:10px;cursor:pointer;transition:background .15s ease, box-shadow .15s ease, transform .06s ease;
}
.btn:hover{box-shadow:var(--shadow); transform: translateY(-1px);}

.app{display:grid;grid-template-columns: 280px 1fr; gap:16px; padding:16px}
@media (max-width: 980px){ .app{grid-template-columns:1fr} .nav{order:2} .content{order:1} }

/* Sidebar */
.nav{
  position:sticky; top:74px; align-self:start;
  background:var(--panel); border:1px solid var(--border); border-radius:14px; padding:12px; box-shadow: var(--shadow);
}
.search-wrap{display:flex; align-items:center; gap:8px; border:1px solid var(--border); border-radius:10px; padding:8px 10px; background:var(--panel-2)}
.search-wrap input{flex:1; border:0; outline:0; background:transparent; color:var(--text); font-size:.95rem}
.tool-list{list-style:none; padding:10px 0 0; margin:0; display:flex; flex-direction:column; gap:6px; max-height:50vh; overflow:auto}

/* Tool list buttons */
.tool-list button{
  width:100%; text-align:left; padding:10px 12px; border-radius:10px;
  border:1px solid var(--border); background:var(--panel); color:var(--text); cursor:pointer;
  font-weight:600; font-size:.92rem; position:relative; transition:background .12s ease, border-color .12s ease;
}
.tool-list button:hover{background:var(--panel-2)}
.tool-list button[aria-selected="true"]{
  background: var(--panel-2);
  border-color: var(--ring);
  box-shadow: inset 3px 0 0 0 var(--ring);
}

/* Main content panel */
.content{
  min-height:60vh; background:var(--panel);
  border:1px solid var(--border); border-radius:16px; padding:14px; box-shadow: var(--shadow);
}

.empty{padding:40px; text-align:center}
.empty h2{margin:0 0 8px}
.empty p{color:var(--muted); margin:0}

/* Tool layout */
.tool{display:grid; gap:12px}
.tool header{display:flex; align-items:center; justify-content:space-between; gap:10px; flex-wrap:wrap}
.tool-actions{display:flex; gap:8px; flex-wrap:wrap}

/* Action buttons */
.action{
  display:inline-flex; align-items:center; gap:6px; padding:8px 12px; border-radius:10px; cursor:pointer;
  background: var(--panel); color: var(--text); border:1px solid var(--border); font-weight:600;
}
.tool-actions .action:not([data-act="swap"]):not([data-act="clear"]):not([data-act="format"]):not([data-act="minify"]):not(select){
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}
.action:hover{filter:brightness(1.05)}

/* Select */
.tool-actions select.action{padding:8px 10px}

/* Textareas */
.row{display:grid; grid-template-columns:1fr; gap:12px}
.textarea{
  width:100%; min-height:220px; padding:12px 14px; border-radius:12px;
  border:1px solid var(--border); background: var(--panel-2); color:var(--text); resize:vertical;
}
.counter{color:var(--muted); font-size:.85rem; text-align:right; margin-top:6px}

/* Toast */
.toast{position:fixed; right:16px; bottom:16px; background:var(--panel); border:1px solid var(--border); padding:10px 12px; border-radius:10px; opacity:0; transform: translateY(8px); transition: .2s; box-shadow:var(--shadow); font-weight:600}
.toast.show{opacity:1; transform: translateY(0)}

/* Command palette */
.cmd::backdrop{background:rgba(0,0,0,.45)}
.cmd{border:1px solid var(--border); border-radius:12px; padding:0; width:min(680px, 92vw); background:var(--panel)}
.cmd-body{padding:12px}
.cmd-body input{width:100%; padding:10px 12px; border-radius:10px; border:1px solid var(--border); background:var(--panel-2); color:var(--text)}
.cmd-results{list-style:none; margin:10px 0 0; padding:0; max-height:50vh; overflow:auto}
.cmd-results li{padding:10px 12px; border-radius:8px; cursor:pointer}
.cmd-results li[aria-selected="true"], .cmd-results li:hover{background:var(--panel-2)}

kbd{padding:2px 6px; border-radius:4px; border:1px solid var(--border); font-size:.85em}
[hidden]{display:none !important}
:focus-visible{outline:2px solid var(--ring); outline-offset:3px}

/* Headings inside tool */
.tool h2{ font-size: clamp(18px, 2.2vw, 22px); margin: 0; }
.muted{color:var(--muted); font-size:.9rem}