* {
  box-sizing: border-box;
}

html {
  min-height: 100%;
  background: #02030a url("img/SamirinVPM_BackGround.png") center / cover fixed no-repeat;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  max-width: 720px;
  margin: 0 auto;
  padding: 2rem 1.5rem;
  line-height: 1.5;
  color: #f9fafb;
  background: rgba(2, 3, 10, 0.88);
  border-radius: 16px;
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.75);
}

h1 {
  font-size: 1.5rem;
  margin-bottom: 0.5rem;
}

.subtitle {
  color: #d0d7de;
  margin-bottom: 2rem;
}

h2 {
  font-size: 1.1rem;
  margin-top: 2rem;
  margin-bottom: 0.75rem;
}

ol {
  padding-left: 1.5rem;
  margin: 0.5rem 0;
}

li {
  margin: 0.25rem 0;
}

.url-box {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  background: rgba(15, 23, 42, 0.9);
  border: 1px solid rgba(148, 163, 184, 0.5);
  border-radius: 10px;
  padding: 0.5rem 0.75rem;
  margin: 0.75rem 0;
  backdrop-filter: blur(10px);
}

.url-box code {
  flex: 1;
  word-break: break-all;
  font-size: 0.875rem;
}

/* Samirin SButton 風ボタン */
.btn,
.btn-outline {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.45rem 1rem;
  font-size: 0.875rem;
  font-weight: 600;
  border-radius: 8px;
  border-width: 3px;
  border-style: solid;
  border-color: rgba(255, 255, 255, 0.25);
  cursor: pointer;
  text-decoration: none;
  text-shadow: 0 0 18px rgba(0, 0, 0, 0.9);
  box-shadow: 0 6px 0 rgba(0, 0, 0, 0.6);
  transition: transform 0.06s ease-out, box-shadow 0.06s ease-out,
    filter 0.1s ease-out, background 0.1s ease-out;
}

.btn {
  color: #ffffff;
  background-image: linear-gradient(135deg, #ff6fa6, #ff9a6f);
}

.btn-outline {
  color: #ff6fa6;
  background: rgba(15, 23, 42, 0.9);
  border-color: rgba(255, 111, 166, 0.8);
}

.btn:hover,
.btn-outline:hover {
  filter: brightness(1.08);
}

.btn:active,
.btn-outline:active {
  transform: translateY(2px);
  box-shadow: 0 2px 0 rgba(0, 0, 0, 0.7);
}

.card {
  border: 1px solid rgba(148, 163, 184, 0.4);
  border-radius: 12px;
  padding: 1rem 1.25rem;
  margin: 1rem 0;
  background: rgba(15, 23, 42, 0.92);
  backdrop-filter: blur(10px);
}

.card h3 {
  font-size: 1rem;
  margin: 0 0 0.25rem 0;
}

.card .meta {
  font-size: 0.875rem;
  color: #e2e8f0;
  margin-bottom: 0.25rem;
}

.card .desc {
  font-size: 0.875rem;
  margin: 0.5rem 0;
}

.card .actions {
  margin-top: 0.75rem;
}

.toast {
  position: fixed;
  bottom: 1.5rem;
  left: 50%;
  transform: translateX(-50%);
  padding: 0.5rem 1rem;
  background: rgba(15, 23, 42, 0.95);
  color: #ffffff;
  border-radius: 6px;
  font-size: 0.875rem;
  opacity: 0;
  transition: opacity 0.2s;
  pointer-events: none;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.8);
}

.toast.show {
  opacity: 1;
}

a {
  color: #7dd3fc;
}

a:hover {
  text-decoration: underline;
}

.docs-link {
  font-size: 0.875rem;
  margin-top: 1.5rem;
  color: #cbd5f5;
}