:root {
  --bg: #0b0f17;
  --card: #101827;
  --text: #e5e7eb;
  --muted: #9ca3af;
  --btn1: #a1f3d1;
  --btn2: #ffd166;
  --btn3: #60a5fa;
  --btn4: #f472b6;
  --btn5: #34d399;
  --btn6: #f59e0b;
  --btn7: #c4b5fd;
  --shadow: 0 10px 30px rgba(0,0,0,.35);
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial;
  background: radial-gradient(1200px 800px at 80% -10%, #1f2937 0%, #0b0f17 55%);
  color: var(--text);
  display: grid;
  place-items: center;
}

.container {
  width: min(820px, 92vw);
  background: linear-gradient(180deg, rgba(255,255,255,.04), rgba(255,255,255,.02));
  border: 1px solid rgba(255,255,255,.08);
  box-shadow: var(--shadow);
  border-radius: 20px;
  padding: clamp(18px, 4vw, 28px);
  backdrop-filter: blur(6px);
}

.header { display: flex; align-items: center; gap: 12px; margin-bottom: 10px; }
.logo { width: 36px; height: 36px; border-radius: 10px;
  background: conic-gradient(from 180deg, #60a5fa, #a78bfa, #34d399, #60a5fa);
}
h1 { font-size: 22px; margin: 0; letter-spacing: .2px; }
p.desc { color: var(--muted); margin: 8px 0 18px; line-height: 1.6; }

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 12px;
}

.btn {
  border: 0; padding: 14px 16px; border-radius: 16px; cursor: pointer;
  font-weight: 600; letter-spacing: .2px;
  display: flex; align-items: center; justify-content: center; gap: 8px;
  filter: saturate(1.05);
  transition: transform .06s ease, filter .2s ease, opacity .2s ease;
  user-select: none; -webkit-tap-highlight-color: transparent;
}
.btn:active { transform: translateY(1px) scale(.99); }
.btn span.icon { font-size: 18px; line-height: 1; }
.btn-1 { background: var(--btn1); color: #064e3b; }
.btn-2 { background: var(--btn2); color: #7c2d12; }
.btn-3 { background: var(--btn3); color: #0b2545; }
.btn-4 { background: var(--btn4); color: #4a044e; }
.btn-5 { background: var(--btn5); color: #052e2b; }
.btn-6 { background: var(--btn6); color: #3d1e01; }
.btn-7 { background: var(--btn7); color: #1f1147; }

.card {
  margin-top: 14px; padding: 12px 14px; border-radius: 14px;
  background: rgba(255,255,255,.03); border: 1px solid rgba(255,255,255,.08);
  color: var(--muted); font-size: 14px;
}

.footer { text-align: center; color: var(--muted); font-size: 12px; margin-top: 16px; }

.mask { position: fixed; inset: 0; display: none; place-items: center; z-index: 50; background: rgba(0,0,0,.62); }
.mask.show { display: grid; }
.mask .panel { width: min(520px, 92vw); background: #111827; color: #e5e7eb; border-radius: 18px;
  padding: 18px; box-shadow: var(--shadow); }
.mask h3 { margin: 0 0 8px; font-size: 18px; }
.mask p { margin: 8px 0; color: #cbd5e1; }
.mask code, .mono { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; background: #0b1220; padding: 2px 6px; border-radius: 6px; color: #93c5fd; }
.mask .actions { display: flex; gap: 10px; margin-top: 10px; }
.mask .actions button { padding: 10px 14px; border-radius: 12px; border: 0; cursor: pointer; }
.mask .primary { background: #60a5fa; color: #0b1220; font-weight: 700;}
.mask .secondary { background: #1f2937; color: #e5e7eb; border: 1px solid #374151;}