/* ===== Base ===== */
*,
*::before,
*::after {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: #0b0b0b;
  color: #eee;
  line-height: 1.7;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: #d9a6ff;
  text-decoration: none;
}

a:hover {
  color: #f0d6ff;
}

/* ===== Layout ===== */
.container {
  max-width: 1000px;
  margin: 0 auto;
  padding: 80px 20px;
}

/* ===== Header ===== */
.install-hero {
  text-align: center;
  padding: 100px 20px 80px;
  background:
    linear-gradient(180deg, #83088730, transparent 45%),
    repeating-linear-gradient(
      90deg,
      #ffffff08,
      #ffffff08 1px,
      transparent 2px,
      transparent 10px
    ),
    #0b0b0b;
}

.install-hero h1 {
  font-size: 2.6em;
  margin-bottom: 0.3em;
}

.install-hero p {
  color: #ccc;
  max-width: 700px;
  margin: 0 auto;
}

/* ===== OS Tabs ===== */
.os-tabs {
  display: flex;
  justify-content: center;
  gap: 12px;
  margin-top: 40px;
}

.os-tab {
  padding: 8px 22px;
  border-radius: 999px;
  background: #2e2e2eaa;
  color: #ccc;
  cursor: pointer;
  font-weight: 600;
}

.os-tab.active {
  background: linear-gradient(135deg, #a100c4, #520065);
  color: #fff;
}

/* ===== Step ===== */
.step {
  margin-bottom: 70px;
  padding: 36px;
  border-radius: 10px;
  background: #1a0f1fdd;
  box-shadow: 0 0 40px #00000088;
}

.step-header {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 20px;
}

.step-number {
  width: 44px;
  height: 44px;
  border-radius: 10px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #a100c4, #520065);
  font-weight: bold;
  color: #fff;
  flex-shrink: 0;
}

.step h2 {
  font-size: 1.9em;
  margin: 0;
}

.step p {
  color: #ddd;
  margin-bottom: 20px;
}

/* ===== Code ===== */
.code-block {
  background: #0b0b0b;
  border-radius: 14px;
  padding: 18px 22px;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.95em;
  overflow-x: auto;
  box-shadow: inset 0 0 0 1px #ffffff12;
}

.code-block code {
  color: #e6c8ff;
}

/* ===== Image ===== */
.step-image {
  margin-top: 28px;
  border-radius: 14px;
  overflow: hidden;
  box-shadow: 0 12px 50px #000000aa;
}

/* ===== Notice ===== */
.notice {
  margin-top: 24px;
  padding: 14px 18px;
  border-left: 4px solid #a100c4;
  background: #2a1532cc;
  color: #f1d9ff;
  font-size: 0.95em;
}

/* ===== Links ===== */

/* 基本リンク（本文用） */
a {
  color: #d9a6ff;
  text-decoration: underline;
  text-decoration-color: #a100c4;
  text-underline-offset: 3px;
}

a:hover {
  color: #f0d6ff;
  text-decoration-color: #d9a6ff;
}

/* 外部リンク（視認性重視） */
a.external {
  font-weight: 600;
}

/* ボタン的リンク */
.link-button {
  display: inline-block;
  margin-top: 20px;
  padding: 10px 28px;
  border-radius: 10px;
  background: linear-gradient(135deg, #a100c4, #520065);
  color: #fff;
  font-weight: bold;
  text-decoration: none;
}

.link-button:hover {
  background: linear-gradient(135deg, #c000ec, #6b008a);
}

/* コードブロック内リンク */
.code-block a {
  color: #e6c8ff;
  text-decoration: underline;
}

.code-block a:hover {
  color: #ffffff;
}
/* ===== Inline code ===== */
p code,
li code,
.notice code {
  padding: 2px 6px;
  border-radius: 6px;
  background: #0b0b0b;
  color: #e6c8ff;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.95em;
  box-shadow: inset 0 0 0 1px #ffffff14;
}

/* ===== Footer ===== */
footer {
  background: #14001a;
  text-align: center;
  color: #aaa;
  padding: 20px 10px;
  font-size: 0.9em;
}