/* ============================================================
   ToolBox — styles.css
   Dark, modern, responsive. No frameworks, no build step.
   ============================================================ */

:root{
  --bg:#0b1020;
  --bg-2:#0f1730;
  --panel:#141d38;
  --panel-2:#1a2445;
  --line:#26314f;
  --line-soft:#1e2947;
  --text:#e8edf9;
  --muted:#97a3c4;
  --brand:#6c8cff;
  --brand-2:#22d3ee;
  --ok:#34d399;
  --warn:#fbbf24;
  --danger:#fb7185;
  --radius:14px;
  --radius-sm:10px;
  --shadow:0 10px 30px rgba(2,6,23,.45);
  --sidebar-w:268px;
}

@media (prefers-color-scheme: light){
  :root{
    --bg:#f5f7fc;
    --bg-2:#ffffff;
    --panel:#ffffff;
    --panel-2:#f2f5fb;
    --line:#dbe2f1;
    --line-soft:#e8edf8;
    --text:#132039;
    --muted:#5b6b8c;
    --brand:#3b5bdb;
    --brand-2:#0e9db0;
    --shadow:0 8px 24px rgba(15,32,64,.08);
  }
}

*,*::before,*::after{box-sizing:border-box}

html,body{margin:0;padding:0}

body{
  background:
    radial-gradient(1100px 600px at 12% -10%, rgba(108,140,255,.16), transparent 60%),
    radial-gradient(900px 500px at 92% 0%, rgba(34,211,238,.12), transparent 55%),
    var(--bg);
  color:var(--text);
  font-family:"Inter",-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  font-size:15px;
  line-height:1.6;
  min-height:100vh;
  -webkit-font-smoothing:antialiased;
}

a{color:var(--brand);text-decoration:none}
a:hover{text-decoration:underline}
img,canvas,video,svg{max-width:100%}
h1,h2,h3,h4{line-height:1.25;margin:0 0 .4em}
h1{font-size:clamp(1.5rem,3vw,2rem);letter-spacing:-.02em}
h2{font-size:1.2rem}
h3{font-size:1rem}
p{margin:0 0 .9em}
hr{border:0;border-top:1px solid var(--line);margin:1.4rem 0}
code,kbd,pre{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace}

/* ---------- Top bar ---------- */
.topbar{
  position:sticky;top:0;z-index:50;
  display:flex;align-items:center;gap:16px;
  padding:12px 18px;
  background:color-mix(in srgb, var(--bg) 82%, transparent);
  backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line);
}
.brand{display:flex;align-items:center;gap:10px;color:var(--text);text-decoration:none;flex:0 0 auto}
.brand:hover{text-decoration:none}
.brand-mark{
  width:34px;height:34px;border-radius:10px;display:grid;place-items:center;
  background:linear-gradient(135deg,var(--brand),var(--brand-2));color:#fff;
  box-shadow:0 6px 16px rgba(108,140,255,.35);
}
.brand-mark svg{width:19px;height:19px}
.brand-text{font-weight:800;letter-spacing:-.02em;font-size:1.12rem}
.brand-text span{color:var(--brand)}

.search-wrap{position:relative;flex:1 1 auto;max-width:520px}
.search-ico{
  position:absolute;left:12px;top:50%;transform:translateY(-50%);
  width:17px;height:17px;color:var(--muted);pointer-events:none;
}
#search{
  width:100%;padding:10px 12px 10px 38px;
  background:var(--panel);color:var(--text);
  border:1px solid var(--line);border-radius:999px;
  font-size:.92rem;outline:none;transition:border-color .15s, box-shadow .15s;
}
#search:focus{border-color:var(--brand);box-shadow:0 0 0 3px rgba(108,140,255,.2)}
#search::placeholder{color:var(--muted)}

.topbar-actions{display:flex;align-items:center;gap:8px;margin-left:auto}
.menu-toggle{display:none}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:7px;
  padding:9px 15px;border-radius:10px;border:1px solid var(--line);
  background:var(--panel);color:var(--text);
  font-size:.9rem;font-weight:600;font-family:inherit;
  cursor:pointer;transition:transform .08s, background .15s, border-color .15s, opacity .15s;
  text-decoration:none;white-space:nowrap;
}
.btn:hover{background:var(--panel-2);border-color:color-mix(in srgb,var(--brand) 45%, var(--line));text-decoration:none}
.btn:active{transform:translateY(1px)}
.btn:disabled{opacity:.5;cursor:not-allowed}
.btn-primary{
  background:linear-gradient(135deg,var(--brand),#8a6dff);
  border-color:transparent;color:#fff;
  box-shadow:0 8px 20px rgba(108,140,255,.28);
}
.btn-primary:hover{background:linear-gradient(135deg,#7d99ff,#9a80ff);border-color:transparent}
.btn-ghost{background:transparent;border-color:transparent;color:var(--muted)}
.btn-ghost:hover{color:var(--text);background:var(--panel)}
.btn-sm{padding:6px 11px;font-size:.82rem;border-radius:8px}
.btn-danger{border-color:color-mix(in srgb,var(--danger) 45%, var(--line));color:var(--danger)}
.btn-danger:hover{background:color-mix(in srgb,var(--danger) 14%, transparent)}
.btn-ok{border-color:color-mix(in srgb,var(--ok) 45%, var(--line));color:var(--ok)}
.btn svg{width:16px;height:16px;flex:0 0 auto}

/* ---------- Layout ---------- */
.layout{
  display:grid;
  grid-template-columns:var(--sidebar-w) minmax(0,1fr);
  gap:22px;
  max-width:1480px;margin:0 auto;padding:22px 18px 40px;
  align-items:start;
}

.sidebar{
  position:sticky;top:74px;
  max-height:calc(100vh - 96px);
  overflow-y:auto;
  padding:14px 10px;
  background:color-mix(in srgb,var(--panel) 60%, transparent);
  border:1px solid var(--line);
  border-radius:var(--radius);
  scrollbar-width:thin;
}
.nav-group-label{
  font-size:.7rem;text-transform:uppercase;letter-spacing:.11em;
  color:var(--muted);font-weight:700;
  padding:14px 10px 6px;
}
.nav-group-label:first-child{padding-top:4px}
.nav-item{
  display:flex;align-items:center;gap:10px;
  padding:8px 10px;border-radius:9px;
  color:var(--text);font-size:.885rem;font-weight:500;
  text-decoration:none;transition:background .13s,color .13s;
}
.nav-item:hover{background:var(--panel-2);text-decoration:none}
.nav-item.active{background:color-mix(in srgb,var(--brand) 20%, transparent);color:var(--text);font-weight:650}
.nav-item .ico{width:18px;height:18px;flex:0 0 auto;color:var(--muted)}
.nav-item.active .ico{color:var(--brand)}
.nav-item .num{
  margin-left:auto;font-size:.7rem;color:var(--muted);
  font-variant-numeric:tabular-nums;font-weight:600;
}
.side-foot{margin-top:16px;padding:12px 10px 4px;border-top:1px solid var(--line-soft)}
.side-foot .tiny{margin:0;font-size:.75rem;line-height:1.5;color:var(--muted)}

.view{min-width:0;outline:none}

/* ---------- Cards / panels ---------- */
.card{
  background:var(--panel);
  border:1px solid var(--line);
  border-radius:var(--radius);
  padding:20px;
  box-shadow:var(--shadow);
  margin-bottom:18px;
}
.card-pad-sm{padding:14px}
.card h2:first-child,.card h3:first-child{margin-top:0}

.grid{display:grid;gap:14px}
.grid-2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid-3{grid-template-columns:repeat(3,minmax(0,1fr))}
.grid-auto{grid-template-columns:repeat(auto-fill,minmax(230px,1fr))}

.row{display:flex;gap:10px;flex-wrap:wrap;align-items:center}
.row-between{display:flex;gap:12px;flex-wrap:wrap;align-items:center;justify-content:space-between}
.stack{display:flex;flex-direction:column;gap:12px}
.mt{margin-top:12px}
.mb{margin-bottom:12px}
.center{text-align:center}
.hidden{display:none !important}

/* ---------- Hero ---------- */
.hero{
  position:relative;overflow:hidden;
  border-radius:18px;padding:34px 28px;margin-bottom:22px;
  background:
    radial-gradient(700px 300px at 88% 10%, rgba(34,211,238,.20), transparent 60%),
    linear-gradient(135deg, rgba(108,140,255,.24), rgba(138,109,255,.12) 45%, transparent);
  border:1px solid var(--line);
}
.hero h1{margin:0 0 8px;font-size:clamp(1.6rem,3.4vw,2.3rem)}
.hero p{color:var(--muted);max-width:62ch;margin:0 0 18px}
.hero .badges{display:flex;gap:8px;flex-wrap:wrap}
.pill{
  display:inline-flex;align-items:center;gap:6px;
  padding:5px 11px;border-radius:999px;
  background:color-mix(in srgb,var(--panel) 75%, transparent);
  border:1px solid var(--line);
  font-size:.76rem;font-weight:600;color:var(--muted);
}
.pill svg{width:13px;height:13px}

/* ---------- Tool grid (home) ---------- */
.tool-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:14px}
.tool-card{
  position:relative;display:flex;flex-direction:column;gap:8px;
  padding:17px;border-radius:var(--radius);
  background:var(--panel);border:1px solid var(--line);
  color:var(--text);text-decoration:none;
  transition:transform .15s, border-color .15s, background .15s, box-shadow .15s;
}
.tool-card:hover{
  transform:translateY(-3px);
  border-color:color-mix(in srgb,var(--brand) 55%, var(--line));
  text-decoration:none;
  box-shadow:0 14px 30px rgba(2,6,23,.35);
}
.tool-card .t-ico{
  width:38px;height:38px;border-radius:11px;display:grid;place-items:center;
  background:color-mix(in srgb,var(--brand) 16%, transparent);
  color:var(--brand);border:1px solid color-mix(in srgb,var(--brand) 24%, transparent);
}
.tool-card .t-ico svg{width:19px;height:19px}
.tool-card h3{margin:2px 0 0;font-size:.98rem;font-weight:700}
.tool-card p{margin:0;font-size:.83rem;color:var(--muted);line-height:1.5}
.tool-card .tag{
  position:absolute;top:13px;right:13px;
  font-size:.66rem;font-weight:800;letter-spacing:.06em;text-transform:uppercase;
  color:var(--muted);background:var(--panel-2);
  border:1px solid var(--line);padding:2px 7px;border-radius:999px;
}

/* ---------- Tool page ---------- */
.tool-head{display:flex;align-items:flex-start;gap:14px;margin-bottom:18px;flex-wrap:wrap}
.tool-head .t-ico{
  width:46px;height:46px;border-radius:13px;display:grid;place-items:center;flex:0 0 auto;
  background:linear-gradient(135deg,rgba(108,140,255,.22),rgba(34,211,238,.16));
  border:1px solid color-mix(in srgb,var(--brand) 30%, transparent);
  color:var(--brand);
}
.tool-head .t-ico svg{width:22px;height:22px}
.tool-head h1{margin:0 0 3px;font-size:1.45rem}
.tool-head .sub{margin:0;color:var(--muted);font-size:.9rem}
.tool-head .crumbs{font-size:.78rem;color:var(--muted);margin-bottom:6px}
.tool-head .crumbs a{color:var(--muted)}
.tool-head .crumbs a:hover{color:var(--brand)}

/* ---------- Forms ---------- */
label.field{display:block;margin-bottom:12px}
label.field > span.lbl{
  display:block;font-size:.78rem;font-weight:700;letter-spacing:.03em;
  text-transform:uppercase;color:var(--muted);margin-bottom:5px;
}
textarea,input[type=text],input[type=number],input[type=password],input[type=url],input[type=email],select{
  width:100%;padding:10px 12px;
  background:var(--bg-2);color:var(--text);
  border:1px solid var(--line);border-radius:var(--radius-sm);
  font-family:inherit;font-size:.92rem;outline:none;
  transition:border-color .15s, box-shadow .15s;
}
textarea{resize:vertical;min-height:140px;line-height:1.55}
textarea.mono,input.mono{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:.86rem}
textarea:focus,input:focus,select:focus{border-color:var(--brand);box-shadow:0 0 0 3px rgba(108,140,255,.18)}
input[type=range]{width:100%;accent-color:var(--brand);cursor:pointer}
input[type=checkbox],input[type=radio]{accent-color:var(--brand);width:16px;height:16px;cursor:pointer}
.check{display:inline-flex;align-items:center;gap:8px;font-size:.88rem;cursor:pointer;user-select:none}
select{cursor:pointer}

/* Drop zone */
.dropzone{
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:8px;
  padding:34px 20px;text-align:center;cursor:pointer;
  border:2px dashed var(--line);border-radius:var(--radius);
  background:color-mix(in srgb,var(--panel-2) 45%, transparent);
  transition:border-color .15s, background .15s;
}
.dropzone:hover,.dropzone.over{
  border-color:var(--brand);
  background:color-mix(in srgb,var(--brand) 10%, transparent);
}
.dropzone svg{width:30px;height:30px;color:var(--brand)}
.dropzone strong{font-size:.95rem}
.dropzone span{font-size:.8rem;color:var(--muted)}
.dropzone input[type=file]{display:none}

/* ---------- Canvas / preview ---------- */
.canvas-wrap{
  position:relative;display:inline-block;max-width:100%;
  border:1px solid var(--line);border-radius:var(--radius-sm);overflow:hidden;
  background:
    repeating-conic-gradient(#00000010 0% 25%, transparent 0% 50%) 50% / 18px 18px,
    var(--bg-2);
}
.canvas-wrap canvas{display:block;max-width:100%;height:auto;cursor:crosshair}
.canvas-wrap video{display:block;max-width:100%;height:auto}
.preview-img{max-width:100%;border-radius:var(--radius-sm);border:1px solid var(--line);display:block}

.split{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:16px;align-items:start}
@media (max-width:900px){.split{grid-template-columns:1fr}}

.hint{font-size:.8rem;color:var(--muted);margin:6px 0 0}
.tiny{font-size:.78rem;color:var(--muted)}

/* ---------- Stats ---------- */
.stats{display:grid;grid-template-columns:repeat(auto-fill,minmax(120px,1fr));gap:10px}
.stat{
  background:var(--panel-2);border:1px solid var(--line-soft);
  border-radius:var(--radius-sm);padding:11px 13px;
}
.stat b{display:block;font-size:1.25rem;font-variant-numeric:tabular-nums;letter-spacing:-.02em}
.stat span{font-size:.72rem;color:var(--muted);text-transform:uppercase;letter-spacing:.07em;font-weight:700}

/* ---------- Output box ---------- */
.output-box{
  position:relative;
  background:var(--bg-2);border:1px solid var(--line);
  border-radius:var(--radius-sm);padding:12px;
  font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  font-size:.86rem;white-space:pre-wrap;word-break:break-word;
  max-height:420px;overflow:auto;line-height:1.55;
}
.out-actions{display:flex;gap:8px;flex-wrap:wrap;margin-top:10px}

/* ---------- Progress ---------- */
.progress{height:8px;border-radius:99px;background:var(--panel-2);overflow:hidden;border:1px solid var(--line-soft)}
.progress > i{
  display:block;height:100%;width:0;
  background:linear-gradient(90deg,var(--brand),var(--brand-2));
  transition:width .2s;
}

/* ---------- Tabs / segmented ---------- */
.seg{display:inline-flex;gap:4px;padding:3px;background:var(--panel-2);border:1px solid var(--line);border-radius:10px;flex-wrap:wrap}
.seg button{
  padding:6px 13px;border-radius:7px;border:0;background:transparent;color:var(--muted);
  font-size:.84rem;font-weight:650;font-family:inherit;cursor:pointer;
}
.seg button.on{background:var(--brand);color:#fff}

/* ---------- Table ---------- */
.tbl{width:100%;border-collapse:collapse;font-size:.87rem}
.tbl th,.tbl td{text-align:left;padding:8px 10px;border-bottom:1px solid var(--line-soft)}
.tbl th{font-size:.72rem;text-transform:uppercase;letter-spacing:.07em;color:var(--muted)}
.tbl tr:last-child td{border-bottom:0}

/* ---------- Swatches ---------- */
.swatches{display:grid;grid-template-columns:repeat(auto-fill,minmax(84px,1fr));gap:8px}
.swatch{border-radius:9px;overflow:hidden;border:1px solid var(--line);cursor:pointer;background:var(--panel-2)}
.swatch i{display:block;height:56px}
.swatch span{display:block;padding:5px 6px;font-size:.72rem;text-align:center;font-family:ui-monospace,monospace}

/* ---------- Toast ---------- */
.toast{
  position:fixed;left:50%;bottom:26px;transform:translate(-50%,20px);
  background:var(--panel);color:var(--text);
  border:1px solid var(--line);border-radius:11px;
  padding:11px 18px;font-size:.88rem;font-weight:600;
  box-shadow:0 16px 40px rgba(2,6,23,.5);
  opacity:0;pointer-events:none;transition:opacity .2s, transform .2s;z-index:200;
  max-width:90vw;text-align:center;
}
.toast.show{opacity:1;transform:translate(-50%,0)}
.toast.err{border-color:color-mix(in srgb,var(--danger) 55%, var(--line));color:var(--danger)}
.toast.ok{border-color:color-mix(in srgb,var(--ok) 55%, var(--line));color:var(--ok)}

/* ---------- Footer ---------- */
.foot{
  max-width:1480px;margin:0 auto;padding:22px 18px 40px;
  border-top:1px solid var(--line);
  color:var(--muted);font-size:.83rem;text-align:center;
}
.foot p{margin:0 0 4px}
.foot .tiny{font-size:.76rem;opacity:.8}

/* ---------- Loading spinner ---------- */
.spinner{
  width:15px;height:15px;border-radius:50%;
  border:2px solid color-mix(in srgb,var(--brand) 30%, transparent);
  border-top-color:var(--brand);
  animation:spin .7s linear infinite;display:inline-block;
}
@keyframes spin{to{transform:rotate(360deg)}}

/* ---------- Responsive ---------- */
@media (max-width:1080px){
  .grid-3{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:860px){
  .menu-toggle{display:inline-flex}
  .layout{grid-template-columns:1fr;padding:16px 14px 32px}
  .sidebar{
    position:fixed;top:0;left:0;bottom:0;z-index:100;
    width:min(300px,84vw);max-height:none;border-radius:0;
    background:var(--bg-2);
    transform:translateX(-102%);transition:transform .22s ease;
    padding-top:20px;
  }
  .sidebar.open{transform:translateX(0)}
  .grid-2,.grid-3{grid-template-columns:1fr}
  .hero{padding:24px 18px}
  .brand-text{display:none}
  #search{font-size:.86rem}
  .topbar{padding:10px 12px;gap:10px}
}
@media (max-width:520px){
  .tool-grid{grid-template-columns:1fr}
  .card{padding:15px}
  .btn{padding:8px 12px;font-size:.85rem}
}
@media (prefers-reduced-motion:reduce){
  *{animation-duration:.001ms !important;transition-duration:.001ms !important}
}