:root {
  --bg: #f4f6fb;
  --panel: rgba(255,255,255,.86);
  --panel-solid: #ffffff;
  --text: #172033;
  --muted: #6b7280;
  --line: #e7eaf1;
  --primary: #1f4e79;
  --primary2: #3b82f6;
  --accent: #c9a45c;
  --danger: #e5484d;
  --sale: #c2413b;
  --contract: #1f5f99;
  --shadow: 0 24px 70px rgba(23, 32, 51, .10);
  --radius: 18px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans JP", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at 10% 10%, rgba(59,130,246,.18), transparent 32%),
    radial-gradient(circle at 90% 0%, rgba(201,164,92,.18), transparent 28%),
    linear-gradient(135deg, #f7f9fd 0%, #eef2f8 100%);
}

button, input, textarea {
  font: inherit;
}

button {
  border: 0;
}

.hidden { display: none !important; }

.glass {
  background: var(--panel);
  backdrop-filter: blur(18px);
  border: 1px solid rgba(255,255,255,.7);
  box-shadow: var(--shadow);
}

.primary-btn,
.ghost-btn,
.mode-btn,
.icon-btn {
  border-radius: 12px;
  cursor: pointer;
  transition: .18s ease;
}

.primary-btn {
  background: linear-gradient(135deg, var(--primary), var(--primary2));
  color: #fff;
  padding: 10px 16px;
  font-weight: 700;
  box-shadow: 0 12px 30px rgba(31,78,121,.20);
}

.primary-btn:hover { transform: translateY(-1px); }

.ghost-btn {
  background: #fff;
  color: var(--primary);
  border: 1px solid var(--line);
  padding: 10px 16px;
  font-weight: 700;
}

.large {
  font-size: 16px;
  padding: 14px 20px;
}

.full { width: 100%; }

.icon-btn {
  width: 34px;
  height: 34px;
  background: #f4f6fa;
  color: var(--muted);
  font-weight: 800;
}

.locked,
.locked-action {
  opacity: .42;
  pointer-events: none;
  filter: grayscale(.2);
}

input, textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 11px 12px;
  outline: none;
  background: #fff;
}

input:focus,
textarea:focus {
  border-color: rgba(59,130,246,.65);
  box-shadow: 0 0 0 4px rgba(59,130,246,.10);
}

label {
  display: grid;
  gap: 7px;
  color: #374151;
  font-size: 13px;
  font-weight: 700;
}

h1, h2, h3, p { margin-top: 0; }