:root {
  --sls-white: #ffffff;
  --sls-blue: #0a2540;
  --sls-green: #1a7a4c;
  --sls-orange: #c47a1a;
  --sls-ink: #152033;
  --sls-muted: #5b6b7c;
  --sls-surface: #f4f7f5;
  --sls-line: #d5e3da;
  --sls-max: 1080px;
  --sls-font: "IBM Plex Sans", "Hiragino Sans", "Noto Sans JP", system-ui, sans-serif;
  --sls-display: "IBM Plex Serif", "Source Han Serif JP", Georgia, serif;
}

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

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--sls-font);
  color: var(--sls-ink);
  background: var(--sls-white);
  line-height: 1.6;
}

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

a { color: var(--sls-green); text-underline-offset: 0.15em; }
a:hover { color: var(--sls-orange); }

.sls-skip {
  position: absolute;
  left: -9999px;
}
.sls-skip:focus {
  left: 1rem;
  top: 1rem;
  z-index: 100;
  background: #fff;
  padding: 0.5rem 1rem;
}

.sls-top {
  position: sticky;
  top: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.75rem 1.25rem;
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--sls-line);
}

.sls-brand {
  font-weight: 700;
  color: var(--sls-blue);
  text-decoration: none;
  letter-spacing: -0.02em;
}

.sls-nav {
  display: none;
  gap: 0.9rem;
  flex-wrap: wrap;
}
.sls-nav a {
  color: var(--sls-muted);
  text-decoration: none;
  font-size: 0.9rem;
}
.sls-nav a:hover { color: var(--sls-blue); }

.sls-lang {
  display: inline-flex;
  border: 1px solid var(--sls-line);
  border-radius: 999px;
  overflow: hidden;
}
.sls-lang button {
  border: 0;
  background: transparent;
  padding: 0.35rem 0.7rem;
  font: inherit;
  cursor: pointer;
  color: var(--sls-muted);
}
.sls-lang button[aria-pressed="true"] {
  background: var(--sls-blue);
  color: #fff;
}

.sls-hero {
  position: relative;
  min-height: min(88vh, 720px);
  display: grid;
  align-items: end;
  color: #fff;
  background:
    linear-gradient(180deg, rgba(10,37,64,0.35) 0%, rgba(10,37,64,0.88) 70%),
    linear-gradient(135deg, #0a2540 0%, #1a7a4c 55%, #c47a1a 120%);
  overflow: hidden;
}
.sls-hero__media {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(180deg, rgba(10,37,64,0.22), rgba(10,37,64,0.86)),
    center / cover no-repeat url("/second-life-solar/assets/images/hero-globe-japan.png");
  opacity: 0.95;
}
.sls-hero__inner {
  position: relative;
  z-index: 1;
  width: min(var(--sls-max), calc(100% - 2rem));
  margin: 0 auto;
  padding: clamp(4rem, 12vw, 7rem) 0 3rem;
}
.sls-eyebrow {
  display: inline-block;
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-weight: 700;
  background: rgba(196,122,26,0.95);
  padding: 0.35rem 0.75rem;
  border-radius: 999px;
  margin-bottom: 1rem;
}
.sls-hero h1 {
  font-family: var(--sls-display);
  font-size: clamp(2rem, 6vw, 3.4rem);
  line-height: 1.15;
  margin: 0 0 0.5rem;
  letter-spacing: -0.02em;
}
.sls-hero__sub {
  font-size: clamp(1.1rem, 2.5vw, 1.45rem);
  margin: 0 0 0.75rem;
  color: rgba(255,255,255,0.92);
}
.sls-hero__tag {
  font-family: var(--sls-display);
  font-size: clamp(1.05rem, 2.4vw, 1.45rem);
  margin: 0 0 1.5rem;
  max-width: 28ch;
}
.sls-cta-row { display: flex; flex-wrap: wrap; gap: 0.75rem; }

.sls-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.75rem;
  padding: 0.65rem 1.2rem;
  border-radius: 999px;
  border: 1px solid transparent;
  text-decoration: none;
  font-weight: 700;
}
.sls-btn--primary { background: var(--sls-orange); color: #fff; }
.sls-btn--ghost { background: transparent; color: #fff; border-color: rgba(255,255,255,0.45); }
.sls-btn--solid { background: var(--sls-green); color: #fff; }
.sls-btn--outline { background: #fff; color: var(--sls-blue); border-color: var(--sls-line); }

.sls-main { width: min(var(--sls-max), calc(100% - 2rem)); margin: 0 auto; }
.sls-section { padding: clamp(2.5rem, 6vw, 4.5rem) 0; border-bottom: 1px solid var(--sls-line); }
.sls-section h2 {
  font-family: var(--sls-display);
  font-size: clamp(1.5rem, 3vw, 2rem);
  color: var(--sls-blue);
  margin: 0 0 0.75rem;
}
.sls-lead {
  font-size: 1.15rem;
  color: var(--sls-blue);
  margin: 0 0 1rem;
  max-width: 40rem;
}
.sls-callout {
  font-family: var(--sls-display);
  font-size: clamp(1.2rem, 2.8vw, 1.65rem);
  line-height: 1.4;
  color: var(--sls-blue);
  margin: 0 0 1.25rem;
  max-width: 36rem;
  padding: 1rem 1.15rem;
  background: linear-gradient(90deg, rgba(26,122,76,0.12), rgba(196,122,26,0.1));
  border-left: 5px solid var(--sls-orange);
}
.sls-section--concept {
  background: linear-gradient(180deg, #f4f7f5 0%, #fff 100%);
  margin-inline: calc(50% - 50vw);
  padding-inline: calc(50vw - 50%);
}
.sls-section p { max-width: 42rem; color: var(--sls-muted); }

.sls-photo-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 0.85rem;
  margin: 1.5rem 0 0;
}
.sls-photo-grid figure {
  margin: 0;
  border-radius: 14px;
  overflow: hidden;
  border: 1px solid var(--sls-line);
  background: #fff;
}
.sls-photo-grid img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  background: #0a2540;
}
.sls-photo-grid figcaption {
  padding: 0.65rem 0.8rem;
  font-size: 0.82rem;
  color: var(--sls-muted);
}

.sls-pilots {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1rem;
}
.sls-pilot {
  padding: 1.15rem 1.2rem;
  border-radius: 16px;
  border: 1px solid var(--sls-line);
  background: #fff;
}
.sls-pilot__status {
  margin: 0 0 0.45rem;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--sls-orange);
}
.sls-pilot h3 {
  margin: 0 0 0.5rem;
  color: var(--sls-blue);
  font-size: 1.05rem;
}
.sls-pilot p:last-child {
  margin: 0;
  font-size: 0.95rem;
}

.sls-section--vision {
  background: linear-gradient(180deg, #fff 0%, #f4f7f5 55%, #fff8ee 100%);
  margin-inline: calc(50% - 50vw);
  padding-inline: calc(50vw - 50%);
}
.sls-vision {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1rem;
  margin-top: 1.35rem;
}
.sls-vision__card {
  padding: 1.25rem;
  border-radius: 16px;
  border: 1px solid var(--sls-line);
  background: #fff;
  display: grid;
  gap: 0.55rem;
  align-content: start;
}
.sls-vision__card h3 {
  margin: 0;
  color: var(--sls-blue);
  font-size: 1.05rem;
}
.sls-vision__card p {
  margin: 0;
  font-size: 0.95rem;
}
.sls-vision__card a {
  font-weight: 700;
  text-decoration: none;
  color: var(--sls-orange);
}
.sls-vision__card a:hover { color: var(--sls-green); }

.sls-list {
  margin: 1rem 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 0.75rem;
}
.sls-list li {
  padding: 0.9rem 1rem;
  border-left: 4px solid var(--sls-green);
  background: var(--sls-surface);
}

.sls-steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: 0.75rem;
  margin-top: 1.25rem;
}
.sls-step {
  background: var(--sls-surface);
  border: 1px solid var(--sls-line);
  border-radius: 14px;
  padding: 1rem 0.75rem;
  text-align: center;
}
.sls-step__n {
  display: block;
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  color: var(--sls-orange);
  font-weight: 700;
  margin-bottom: 0.35rem;
}
.sls-step__label { font-weight: 700; color: var(--sls-blue); font-size: 0.95rem; }

.sls-figure {
  margin: 1.5rem 0 0;
  padding: 1rem;
  background: var(--sls-surface);
  border-radius: 16px;
  border: 1px solid var(--sls-line);
}
.sls-figure figcaption {
  margin-top: 0.75rem;
  font-size: 0.85rem;
  color: var(--sls-muted);
}

.sls-benefits {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1rem;
  margin-top: 1.25rem;
}
.sls-benefit {
  padding: 1.25rem;
  border-radius: 16px;
  background: #fff;
  border: 1px solid var(--sls-line);
}
.sls-benefit h3 {
  margin: 0 0 0.5rem;
  color: var(--sls-blue);
  font-size: 1.05rem;
}
.sls-benefit p { margin: 0; }

.sls-partners {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1rem;
  margin-top: 1.25rem;
}
.sls-partner {
  padding: 1.25rem;
  border-radius: 16px;
  border: 1px solid var(--sls-line);
  background: #fff;
  text-decoration: none;
  color: inherit;
}
.sls-partner img { height: 40px; width: auto; margin-bottom: 0.75rem; }
.sls-partner h3 { margin: 0 0 0.35rem; color: var(--sls-blue); font-size: 1.05rem; }
.sls-partner p { margin: 0; font-size: 0.92rem; }

.sls-note {
  margin-top: 1.25rem;
  padding: 0.9rem 1rem;
  border-radius: 12px;
  background: #fff8ee;
  border-left: 4px solid var(--sls-orange);
  color: var(--sls-ink);
  font-size: 0.92rem;
}

.sls-footer {
  padding: 2rem 1.25rem 3rem;
  background: var(--sls-blue);
  color: rgba(255,255,255,0.85);
  font-size: 0.9rem;
}
.sls-footer a { color: #9ad4b0; }
.sls-footer__inner {
  width: min(var(--sls-max), 100%);
  margin: 0 auto;
  display: grid;
  gap: 0.75rem;
}

/* QR page */
.sls-qr {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 2rem 1rem;
  background: linear-gradient(180deg, #f4f7f5, #fff);
}
.sls-qr__card {
  width: min(420px, 100%);
  background: #fff;
  border: 1px solid var(--sls-line);
  border-radius: 20px;
  padding: 1.75rem;
  box-shadow: 0 18px 40px rgba(10,37,64,0.08);
  text-align: center;
}
.sls-qr__card h1 {
  font-family: var(--sls-display);
  font-size: 1.45rem;
  color: var(--sls-blue);
  margin: 0 0 0.5rem;
}
.sls-qr__links {
  display: grid;
  gap: 0.75rem;
  margin-top: 1.25rem;
}
.sls-qr__links a {
  display: block;
  padding: 0.9rem 1rem;
  border-radius: 12px;
  background: var(--sls-surface);
  color: var(--sls-blue);
  text-decoration: none;
  font-weight: 700;
  border: 1px solid var(--sls-line);
}

@media (min-width: 900px) {
  .sls-nav { display: flex; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}