:root{
  --bg:#0b0c10;
  --panel:#0f1117;
  --panel2:#0d0f14;
  --ink:#f3f4f6;
  --muted:#a7aab3;
  --line:#232634;
  --accent:#ffffff;
  --accent2:#c7c7c7;
  --danger:#ff4d4d;

  --shadow: 0 16px 40px rgba(0,0,0,.45);
  --radius: 18px;
  --radius2: 12px;

  --mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
  --sans: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji","Segoe UI Emoji";
}

*{ box-sizing:border-box; }
html,body{ height:100%; }
body{
  margin:0;
  font-family: var(--sans);
  color: var(--ink);
  background:
    radial-gradient(900px 400px at 10% 0%, rgba(255,255,255,.08), transparent 55%),
    radial-gradient(900px 400px at 90% 0%, rgba(255,255,255,.05), transparent 60%),
    linear-gradient(180deg, #07080b, #0b0c10);
}

/* NAV */
.nav-wrap{
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(10px);
  background: rgba(11,12,16,.75);
  border-bottom: 1px solid rgba(255,255,255,.06);
}
.nav{
  max-width: 1180px;
  margin: 0 auto;
  padding: 12px 18px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap: 14px;
}
.brand{
  display:flex; align-items:center; gap:10px;
  font-weight: 800;
  letter-spacing: .2px;
}
.brand-mark{
  display:inline-flex;
  width:34px;height:34px;
  align-items:center;justify-content:center;
  border-radius: 12px;
  border: 1px solid rgba(255,255,255,.18);
  box-shadow: inset 0 0 0 1px rgba(0,0,0,.35);
}
.brand-name{ white-space:nowrap; }

.nav-links{
  display:flex; gap: 10px;
  align-items:center;
}
.nav a{
  color: var(--ink);
  text-decoration:none;
  padding: 10px 12px;
  border-radius: 12px;
  border: 1px solid transparent;
  transition: transform .15s ease, background .2s ease, border-color .2s ease;
}
.nav a:hover{
  background: rgba(255,255,255,.08);
  border-color: rgba(255,255,255,.14);
  transform: translateY(-1px);
}

.nav-toggle{
  display:none;
  width:44px;height:40px;
  border-radius: 12px;
  border:1px solid rgba(255,255,255,.14);
  background: rgba(255,255,255,.05);
  color: var(--ink);
}
.nav-toggle span{
  display:block;
  height:2px; width:18px;
  background: var(--ink);
  margin: 4px auto;
  border-radius: 2px;
}

/* PAGE */
.page{
  max-width: 1180px;
  margin: 0 auto;
  padding: 22px 18px 54px;
}

.hero{
  margin-top: 10px;
}
.hero-top{
  display:flex;
  align-items:flex-end;
  justify-content:space-between;
  gap: 16px;
  margin-bottom: 14px;
}
.hero h1{
  margin:0;
  font-size: clamp(1.6rem, 2.8vw, 2.4rem);
  letter-spacing: .2px;
}
.sub{ margin:.35rem 0 0; color: var(--muted); }
.hero-badges{ display:flex; gap: 8px; flex-wrap:wrap; justify-content:flex-end; }
.badge{
  font-family: var(--mono);
  font-size: 12px;
  padding: 7px 10px;
  border-radius: 999px;
  border: 1px solid rgba(255,255,255,.12);
  background: rgba(255,255,255,.06);
}

/* TOOL GRID */
.tool{
  display:grid;
  grid-template-columns: 420px 1fr;
  gap: 14px;
  align-items: start;
}
.panel{
  background: linear-gradient(180deg, rgba(255,255,255,.06), rgba(255,255,255,.03));
  border: 1px solid rgba(255,255,255,.09);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow:hidden;
}
.panel-title{
  padding: 14px 14px 10px;
  border-bottom: 1px solid rgba(255,255,255,.08);
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap: 10px;
}
.panel-title h2{
  margin:0;
  font-size: 15px;
  letter-spacing: .4px;
  text-transform: uppercase;
  color: rgba(255,255,255,.92);
}
.panel-actions{ display:flex; gap: 8px; }

.controls{
  padding-bottom: 8px;
}
.group{
  padding: 14px;
  border-bottom: 1px solid rgba(255,255,255,.06);
}
.group:last-child{ border-bottom: none; }
.group h3{
  margin:0 0 10px;
  font-size: 13px;
  letter-spacing: .4px;
  text-transform: uppercase;
  color: rgba(255,255,255,.88);
}
.field{
  display:flex;
  flex-direction:column;
  gap: 6px;
  margin-bottom: 10px;
}
.field span{
  color: rgba(255,255,255,.88);
  font-size: 12px;
}
.field .mini{
  color: var(--muted);
  font-family: var(--mono);
  font-size: 11px;
  margin-left: 6px;
}
textarea, select, input[type="color"]{
  width:100%;
}
textarea{
  resize: vertical;
  min-height: 90px;
  padding: 10px 12px;
  border-radius: 14px;
  border:1px solid rgba(255,255,255,.12);
  background: rgba(0,0,0,.25);
  color: var(--ink);
  outline:none;
}
select, input[type="range"], input[type="color"]{
  border-radius: 12px;
}
select{
  padding: 10px 12px;
  border:1px solid rgba(255,255,255,.12);
  background: rgba(0,0,0,.25);
  color: var(--ink);
  outline:none;
}
input[type="range"]{
  accent-color: #ffffff;
}
input[type="color"]{
  height: 42px;
  padding: 6px;
  border:1px solid rgba(255,255,255,.12);
  background: rgba(0,0,0,.25);
}

.grid-2{
  display:grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}
.row{
  display:flex;
  flex-wrap:wrap;
  gap: 8px;
  margin: 6px 0 10px;
}
.chip{
  display:inline-flex;
  align-items:center;
  gap: 8px;
  padding: 8px 10px;
  border-radius: 999px;
  border: 1px solid rgba(255,255,255,.12);
  background: rgba(255,255,255,.05);
  font-size: 12px;
  color: rgba(255,255,255,.9);
  user-select:none;
}
.chip input{ transform: translateY(1px); }

.hint{
  margin: 6px 0 0;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.35;
}
kbd{
  font-family: var(--mono);
  font-size: 11px;
  padding: 2px 6px;
  border-radius: 8px;
  border: 1px solid rgba(255,255,255,.12);
  background: rgba(0,0,0,.25);
}

.preset-row, .export-row{
  display:flex;
  gap: 10px;
  flex-wrap:wrap;
}

.btn{
  border: 1px solid rgba(255,255,255,.14);
  border-radius: 14px;
  padding: 10px 12px;
  background: rgba(255,255,255,.06);
  color: var(--ink);
  cursor:pointer;
  transition: transform .15s ease, background .2s ease, border-color .2s ease;
  font-weight: 650;
}
.btn:hover{
  transform: translateY(-1px);
  background: rgba(255,255,255,.10);
  border-color: rgba(255,255,255,.22);
}
.btn:active{ transform: translateY(0px); }
.btn-primary{
  background: #ffffff;
  color: #0b0c10;
  border-color: rgba(255,255,255,.3);
}
.btn-primary:hover{ background: #f2f2f2; }
.btn-ghost{
  background: rgba(0,0,0,.20);
}
.btn-soft{
  background: rgba(255,255,255,.08);
}
.btn-danger{
  background: rgba(255,77,77,.12);
  border-color: rgba(255,77,77,.35);
  color: #ffd5d5;
}
.btn-danger:hover{
  background: rgba(255,77,77,.18);
  border-color: rgba(255,77,77,.55);
}

.status{
  margin: 10px 0 0;
  color: var(--muted);
  font-size: 12px;
  min-height: 18px;
}

/* PREVIEW */
.preview{
  min-height: 720px;
}
.preview-wrap{
  position:relative;
  padding: 14px;
}
#canvas{
  width: 100%;
  height: min(74vh, 820px);
  border-radius: 16px;
  border: 1px solid rgba(255,255,255,.10);
  background: transparent; /* canvas stays transparent; checkerboard drawn by JS */
  display:block;
}
.preview-help{
  position:absolute;
  left: 26px;
  bottom: 26px;
  padding: 10px 12px;
  border-radius: 14px;
  background: rgba(0,0,0,.45);
  border: 1px solid rgba(255,255,255,.10);
  color: rgba(255,255,255,.92);
  font-size: 12px;
  max-width: 320px;
}

/* INFO SECTIONS */
.info{
  margin-top: 28px;
  padding: 18px 4px;
}
.info h2{
  margin:0 0 12px;
  font-size: 18px;
  letter-spacing: .3px;
}
.info p{ color: var(--muted); line-height: 1.6; margin:0; }

.cards{
  display:grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}
.card{
  background: rgba(255,255,255,.05);
  border: 1px solid rgba(255,255,255,.08);
  border-radius: var(--radius);
  padding: 14px;
}
.card h3{ margin:0 0 8px; font-size: 14px; text-transform: uppercase; letter-spacing: .35px; }
.card p{ margin:0; color: var(--muted); }

/* FOOTER */
.footer{
  border-top: 1px solid rgba(255,255,255,.08);
  background: rgba(0,0,0,.25);
}
.footer-inner{
  max-width: 1180px;
  margin:0 auto;
  padding: 18px;
  display:flex;
  gap: 12px;
  justify-content:space-between;
  align-items:center;
  color: rgba(255,255,255,.75);
}
.footer-links{
  display:flex; gap: 10px;
}
.footer a{
  color: rgba(255,255,255,.78);
  text-decoration:none;
  padding: 6px 10px;
  border-radius: 12px;
  transition: background .2s ease;
}
.footer a:hover{ background: rgba(255,255,255,.08); }

/* RESPONSIVE */
@media (max-width: 980px){
  .tool{ grid-template-columns: 1fr; }
  .preview{ min-height: 520px; }
  .cards{ grid-template-columns: 1fr; }
  .hero-top{ align-items:flex-start; flex-direction:column; }
  .hero-badges{ justify-content:flex-start; }
}

@media (max-width: 760px){
  .nav-toggle{ display:block; }
  .nav-links{
    display:none;
    position:absolute;
    right: 18px;
    top: 58px;
    flex-direction:column;
    gap: 6px;
    background: rgba(10,11,15,.95);
    border: 1px solid rgba(255,255,255,.10);
    border-radius: 16px;
    padding: 10px;
    width: 210px;
  }
  .nav-links.open{ display:flex; }
  .nav a{ width:100%; }
}