/* ------------------------------
   Base
------------------------------ */

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  padding: 0;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Yu Gothic", "Meiryo",
    sans-serif;
  line-height: 1.7;
  color: #f5f5f5;
  background-color: #0f1115;
}

/* ------------------------------
   Layout
------------------------------ */

.site-wrapper {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 1.25rem 3rem;
}

/* ------------------------------
   Hero header
------------------------------ */

.hero-header {
  background: radial-gradient(circle at top left, #3b82f6, #0f172a 55%);
  color: #f9fafb;
  padding: 2.5rem 1.5rem 2.75rem;
  margin: 0 -1.25rem 2rem;
  text-align: center;
}

.hero-header h1[class="bazzite-os-guide" i] {
  font-size: clamp(2.4rem, 4vw, 3rem);
  letter-spacing: 0.08em;
  text-transform: none; /* ← これで入力通りに表示される */
}

/* ------------------------------
   Article
------------------------------ */

.bazzite-article {
  background-color: #111827;
  border-radius: 1rem;
  padding: 2rem 1.5rem 2.5rem;
  box-shadow: 0 18px 40px rgba(0, 0, 0, 0.45);
  border: 1px solid rgba(148, 163, 184, 0.25);
}

.bazzite-article > h1 {
  margin-top: 0;
  margin-bottom: 1.5rem;
  font-size: clamp(1.5rem, 2.4vw, 1.9rem);
  line-height: 1.4;
}

.bazzite-article p {
  margin: 0 0 1.25rem;
  font-size: 0.95rem;
  color: #e5e7eb;
}

strong {
  font-weight: 700;
  color: #fbbf24;
}

/* ------------------------------
   Headings
------------------------------ */

h2 {
  margin: 2.25rem 0 1rem;
  font-size: 1.25rem;
  border-left: 4px solid #3b82f6;
  padding-left: 0.6rem;
  color: #f9fafb;
}

h3 {
  margin: 1.75rem 0 0.75rem;
  font-size: 1.05rem;
  color: #e5e7eb;
}

/* ------------------------------
   Horizontal rule
------------------------------ */

hr {
  border: none;
  border-top: 1px solid rgba(148, 163, 184, 0.35);
  margin: 2rem 0;
}

/* ------------------------------
   Links
------------------------------ */

a {
  color: #60a5fa;
  transition: color 0.2s ease, opacity 0.2s ease;
}

a:hover {
  color: #93c5fd;
  opacity: 0.9;
}

/* ------------------------------
   Lists
------------------------------ */

ul,
ol {
  margin: 0 0 1.25rem 1.25rem;
  padding: 0;
}

li {
  margin-bottom: 0.35rem;
  font-size: 0.95rem;
}

/* ------------------------------
   Feature block with image
------------------------------ */

.features-with-image {
  display: flex;
  gap: 1.5rem;
  align-items: flex-start;
  margin: 1.5rem 0;
}

.features-text {
  flex: 1 1 60%;
}

.features-image {
  flex: 0 0 260px;
  max-width: 260px;
}

.features-image img {
  width: 100%;
  height: auto;
  display: block;
  border-radius: 0.75rem;
  border: 1px solid rgba(148, 163, 184, 0.4);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.55);
}

/* ------------------------------
   Tables
------------------------------ */

.spec-table {
  width: 100%;
  border-collapse: collapse;
  margin: 0.75rem 0 1.5rem;
  font-size: 0.93rem;
  background-color: #020617;
  border-radius: 0.75rem;
  overflow: hidden;
  border: 1px solid rgba(148, 163, 184, 0.4);
}

.spec-table td {
  padding: 0.7rem 0.9rem;
  border-bottom: 1px solid rgba(30, 64, 175, 0.6);
  vertical-align: top;
}

.spec-table tr:last-child td {
  border-bottom: none;
}

.spec-table td:first-child {
  width: 26%;
  background: linear-gradient(90deg, #0f172a, #020617);
  font-weight: 600;
  color: #bfdbfe;
}

/* ------------------------------
   Install banner
------------------------------ */

.install-banner {
  display: inline-block;
  margin: 2rem auto 0;
  padding: 0.9rem 1.6rem;
  font-size: 1.05rem;
  border-radius: 999px;
  background: linear-gradient(135deg, #3b82f6, #22c55e);
  color: #0b1120;
  text-align: center;
  border: none;
  box-shadow: 0 12px 30px rgba(37, 99, 235, 0.45);
  transition: transform 0.15s ease, box-shadow 0.15s ease, filter 0.15s ease;
}

a:hover .install-banner {
  transform: translateY(-1px);
  box-shadow: 0 16px 40px rgba(37, 99, 235, 0.6);
  filter: brightness(1.05);
}

/* ------------------------------
   Footer
------------------------------ */

footer {
  margin-top: 2.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid rgba(75, 85, 99, 0.7);
  font-size: 0.8rem;
  color: #9ca3af;
  text-align: center;
}

footer p {
  margin: 0.2rem 0;
}

/* ------------------------------
   Responsive
------------------------------ */

@media (max-width: 900px) {
  .site-wrapper {
    padding: 0 1rem 2.5rem;
  }

  .hero-header {
    margin: 0 -1rem 1.75rem;
    padding-inline: 1.25rem;
  }

  .bazzite-article {
    padding-inline: 1.25rem;
  }

  .features-with-image {
    gap: 1.25rem;
  }

  .features-image {
    flex-basis: 220px;
    max-width: 220px;
  }
}

@media (max-width: 720px) {
  .features-with-image {
    flex-direction: column;
  }

  .features-image {
    flex: 1 1 auto;
    max-width: 100%;
    order: 2; /* 画像を下に固定したい場合は 2、上にしたい場合は 0 */
  }

  .features-text {
    order: 1;
  }

  .bazzite-article {
    padding: 1.5rem 1.1rem 2rem;
  }

  h2 {
    font-size: 1.15rem;
  }

  .spec-table td:first-child {
    width: 32%;
  }
}

@media (max-width: 480px) {
  body {
    font-size: 15px;
  }

  .hero-header {
    padding: 2rem 1rem 2.25rem;
  }

  .bazzite-article > h1 {
    font-size: 1.3rem;
  }

  .install-banner {
    width: 100%;
    box-sizing: border-box;
  }
}