:root {
  --ink: #102033;
  --paper: #f2f5f8;
  --accent: #0f8a70;
  --warm: #c26c39;
  --panel: #ffffff;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: "Segoe UI", "Avenir Next", sans-serif;
  color: var(--ink);
  background: radial-gradient(circle at 20% 20%, #dcecff 0, transparent 35%),
              radial-gradient(circle at 80% 10%, #ffe7d6 0, transparent 30%),
              var(--paper);
}

.app-shell {
  width: min(960px, 92vw);
  margin: 1.5rem auto 3rem;
  display: grid;
  gap: 1rem;
}

.panel {
  background: var(--panel);
  border: 1px solid #d9e2ea;
  border-radius: 14px;
  padding: 1rem;
  box-shadow: 0 8px 22px rgba(16, 32, 51, 0.06);
}

.hero h1 { margin: 0; }
.subtitle { margin-top: 0.4rem; }
.notice {
  margin-top: 0.8rem;
  padding: 0.65rem;
  border-left: 4px solid var(--warm);
  background: #fff8f3;
}

h2 { margin-top: 0; }
label { display: block; margin-bottom: 0.7rem; font-size: 0.95rem; }
input, textarea, button {
  width: 100%;
  margin-top: 0.3rem;
  border-radius: 8px;
  border: 1px solid #b8c7d5;
  padding: 0.55rem;
  font: inherit;
}

textarea { resize: vertical; }
.actions { display: flex; gap: 0.7rem; }
.actions button { width: auto; min-width: 150px; }
button {
  background: var(--accent);
  color: #fff;
  border: none;
  cursor: pointer;
}
button:disabled { opacity: 0.45; cursor: not-allowed; }
.status { min-height: 1.2rem; color: #2c4f73; }
.checkbox-row { display: flex; align-items: center; gap: 0.45rem; }
.checkbox-row input { width: auto; margin-top: 0; }

@media (max-width: 720px) {
  .actions { flex-direction: column; }
  .actions button { width: 100%; }
}