:root {
  --bg: #7cb0e4;
  --card: rgba(0, 0, 0, 0.06);
  --card2: rgba(255, 255, 255, 0.08);
  --text: rgb(255, 255, 255);
  --muted: rgba(255, 255, 255, 0.9);
  --border: rgba(255, 255, 255, 0.434);
  --shadow: 0 12px 40px rgba(50, 45, 100, 0.35);
  --radius: 20px;
  --pad: 32px;
  --max: 1100px;
  --mono: --mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Cascadia Mono",
        "Noto Sans Mono CJK JP", "Noto Sans Mono", "JetBrains Mono", "Source Code Pro",
        "Liberation Mono", "Courier New", monospace;
}

:root[data-theme="light"] {
  --bg: #f6f7fb;
  --card: rgba(0, 0, 0, 0.04);
  --card2: rgba(0, 0, 0, 0.06);
  --text: rgba(10, 12, 16, 0.92);
  --muted: rgba(10, 12, 16, 0.65);
  --border: rgba(10, 12, 16, 0.1);
  --shadow: 0 12px 40px rgba(10, 12, 16, 0.1);
}

* {
  box-sizing: border-box;
}
html,
body {
  min-height: 100%;
}

body {
  margin: 0;
  /* font-family: system-ui, -apple-system, "Kaisei Decol", Roboto, "Noto Sans JP", "Hiragino Kaku Gothic ProN", "Yu Gothic", sans-serif; */
  font-family: "Noto Sans JP", sans-serif, system-ui, -apple-system;
  background: radial-gradient(1200px 600px at 10% -10%, rgb(107, 255, 250), transparent 60%),
    radial-gradient(900px 500px at 100% 0%, rgba(255, 255, 255, 0.594), transparent 60%), var(--bg);
    background-attachment:fixed;
  color: var(--text);
}

html {
  overflow-y:auto;
  scroll-behavior:smooth;
  font-family: "Noto Sans JP", sans-serif, system-ui, -apple-system;
}

hr {
  border: none;
  border-top: 3px solid var(--border);
  margin: 12px 0;
}

/* ===== Scrollbar (Chrome/Edge/Safari) ===== */
*::-webkit-scrollbar{
  width: 12px;
  height: 12px;
}

*::-webkit-scrollbar-track{
  background: transparent;           /* 背景は馴染ませる */
}

*::-webkit-scrollbar-thumb{
  background: rgba(255,255,255,0.18); /* つまみを薄く */
  border: 3px solid transparent;      /* 太さ調整 + 角丸を綺麗に */
  background-clip: padding-box;
  border-radius: 999px;
}

*::-webkit-scrollbar-thumb:hover{
  background: rgba(255,255,255,0.28);
  border: 3px solid transparent;
  background-clip: padding-box;
}

/* ===== Scrollbar (Firefox) ===== */
html{
  scrollbar-width:none;
  scrollbar-gutter: calc();
  scrollbar-color: rgba(255, 255, 255, 0.63) transparent;
}

/* ===== Light theme tuning ===== */
:root[data-theme="light"] *::-webkit-scrollbar-thumb{
  background: rgba(0,0,0,0.20);
  border: 3px solid transparent;
  background-clip: padding-box;
}
:root[data-theme="light"] *::-webkit-scrollbar-thumb:hover{
  background: rgba(0,0,0,0.30);
  border: 3px solid transparent;
  background-clip: padding-box;
}
:root[data-theme="light"] html{
  scrollbar-color: rgba(0,0,0,0.28) transparent;
}


.container {
  width: min(var(--max), calc(100% - 32px));
  margin: 0 auto;
}

.header {
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border);
  background: rgba(0, 0, 0, 0.18);
}
:root[data-theme="light"] .header {
  background: rgba(255, 255, 255, 0.65);
}

.header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 14px 0;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
}
.logo {
  width: 46px;
  height: 46px;
  border-radius: 14px;
  display: grid;
  place-items: center;
  background: linear-gradient(135deg, rgba(124, 92, 255, 0.35), rgba(0, 200, 255, 0.25));
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
}

h1 {
  font-size: 36px;
  font-weight: 1000;
  margin: 0;
  font-family: "Noto Sans JP", sans-serif, system-ui, -apple-system;
}
.sub {
  margin: 2px 0 0 0;
  color: var(--muted);
  font-size: 13px;
}

.header-actions {
  display: flex;
  gap: 10px;
  align-items: center;
}

main {
  padding: 18px 0 40px;
}

.grid {
  display: grid;
  grid-template-columns: repeat(9, 1fr);
  gap: 14px;
  margin-top: 16px;
}

.card {
  font-weight: 600;
  grid-column: span 12;
  background: linear-gradient(180deg, var(--card), transparent 160%);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: var(--pad);
  box-shadow: var(--shadow);
}

@media (min-width: 820px) {
  .grid .card:nth-child(1) {
    grid-column: span 6;
  }
  .grid .card:nth-child(2) {
    grid-column: span 3;
  }
  .grid .card:nth-child(3) {
    grid-column: span 3;
  }
}

.row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}
.row-right {
  display: flex;
  gap: 10px;
  align-items: center;
}

h2 {
  margin: 0 0 10px 0;
  font-weight: 600;
  font-size: 36px;
}
h3 {
  margin: 0 0 8px 0;
  font-size: 24px;
}
p {
  margin: 10px 0;
}
.muted {
  color: var(--muted);
}
.hint {
  color: var(--muted);
  font-size: 12px;
  margin-top: 10px;
}

.list {
  margin: 0px 0;
  padding-left: 18px;
  color: var(--text);
}
.list li {
  margin: 30px 0;
}

.chip {
  display: inline-block;
  padding: 10px 8px;
  border-radius: 16px;
  border: 2px solid var(--border);
  background: var(--card2);
  font-size: 14px;
}

.stack {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 16px 12px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: var(--card2);
  color: var(--text);
  text-decoration: none;
  cursor: pointer;
  user-select: none;
  transition: transform 0.12s ease, background 0.12s ease;
}
.btn:hover {
  transform: scale(1.05);
  background: rgba(255, 255, 255, 0.206);
}
:root[data-theme="light"] .btn:hover {
  background: rgba(0, 0, 0, 0.08);
}
.btn:active {
  transform: scale(1.0);
}
.btn.wide {
  width: 100%;
}
.btn.ghost {
  background: transparent;
}

.search {
  width: min(360px, 46vw);
  padding: 10px 12px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text);
  outline: none;
}

.tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 10px 0 12px;
}
.tab {
  font-size: 18px;
  font-weight: 600;
  padding: 9px 10px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text);
  cursor: pointer;
}
.tab.active {
  background: rgba(255, 255, 255, 0.206);
}
.tab:hover {
  transform: scale(1.05);
  background: rgba(255, 255, 255, 0.206);
}

/* ===== Panels fade switch (fixed) ===== */
.panels{
  margin-top: 6px;
  position: relative;
  transition: height 200ms ease;
}

/* inset:0 をやめる（下まで伸びないようにする！） */
.panel{
  position: absolute;
  top: 0;
  left: 0;
  right: 0;

  opacity: 0;
  transform: translateY(8px);
  pointer-events: none;
  visibility: hidden;
  transition: opacity 280ms ease, transform 280ms ease, visibility 0ms linear 280ms;
}

.panel.active{
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
  visibility: visible;
  transition: opacity 280ms ease, transform 280ms ease, visibility 0ms;
}

@media (prefers-reduced-motion: reduce){
  .panels{ transition: none; }
  .panel{ transition: none; transform: none; }
}



.steps details {
  will-change: height;
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 10px 12px;
  background: linear-gradient(180deg, var(--card2), transparent 140%);
  margin: 10px 0;
}
.steps summary {
  cursor: pointer;
  font-weight: 650;
  margin: -2px 0 6px;
  font-size: 30px;
}
.steps ol {
  margin: 8px 0 0 18px;
}
.steps ol li {
  font-size: 18px;
  margin: 20px;
}
.steps ol li p {
  font-size: 16px;
  margin: 8px;
}
.steps ol li a {
  color:rgb(34, 76, 145);
}

.steps li {
  margin: 6px 0;
}
.steps ul {
  margin: 8px 0 0 18px;
}
.steps ul li {
  margin: 6px 0;
}

.callout {
  margin-top: 12px;
  padding: 10px 12px;
  border-radius: 14px;
  border: 1px solid var(--border);
  background: radial-gradient(700px 180px at 20% 20%, rgba(124, 92, 255, 0.25), transparent 70%),
    radial-gradient(650px 200px at 90% 0%, rgba(0, 200, 255, 0.18), transparent 65%), var(--card);
}

code {
  margin: 8px 0 0;
  padding: 4px;
  border-radius: 8px;
  border: 2px solid rgba(0, 0, 0, 0.236);
  background: rgba(72, 119, 150, 0.663);
  overflow: auto;
  font-family: var(--mono);
  font-size: 16px;
  line-height: 2;
  white-space: pre-wrap;
}
:root[data-theme="light"] .code {
  background: rgba(255, 255, 255, 0.55);
}

.footer {
  margin-top: 18px;
  margin-bottom: 18px;
  text-align: center;
}