:root {
  --solar-orange: #f97316;
  --solar-orange-dark: #d97706;
  --link-blue: #1d4ed8;
  --text: #1f2937;
  --muted: #6b7280;
  --border: #e5e7eb;
  --surface: #ffffff;
  --surface-soft: #f8fafc;
  --surface-tint: #fff7ed;
  --background: #f3f4f6;
  --success: #16a34a;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background:
    radial-gradient(circle at top left, rgba(249, 115, 22, 0.12), transparent 22rem),
    linear-gradient(180deg, #ffffff 0%, var(--background) 100%);
  color: var(--text);
  font-family:
    "SF Pro Text",
    "SF Pro Display",
    "Segoe UI",
    Inter,
    Roboto,
    Arial,
    sans-serif;
  line-height: 1.6;
}

a {
  color: var(--link-blue);
}

.page-shell {
  max-width: 1120px;
  margin: 0 auto;
  padding: 32px 20px 72px;
}

.hero {
  background:
    linear-gradient(135deg, rgba(249, 115, 22, 0.12), rgba(29, 78, 216, 0.1)),
    var(--surface);
  border: 1px solid rgba(29, 78, 216, 0.08);
  border-radius: 28px;
  padding: 28px;
  box-shadow: 0 24px 48px rgba(15, 23, 42, 0.08);
}

.brand-row {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 18px;
}

.brand-logo {
  width: 72px;
  height: 72px;
  border-radius: 20px;
  background: #fff;
  box-shadow: 0 12px 24px rgba(29, 78, 216, 0.12);
  padding: 8px;
  object-fit: contain;
}

.brand-title {
  margin: 0;
  font-size: clamp(2rem, 5vw, 3rem);
  line-height: 1.05;
  letter-spacing: -0.03em;
}

.brand-title .solar {
  color: var(--solar-orange);
}

.brand-title .link {
  color: var(--link-blue);
}

.hero p {
  margin: 0;
  max-width: 780px;
  color: var(--muted);
  font-size: 1rem;
}

.meta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 20px;
}

.pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 14px;
  border-radius: 999px;
  border: 1px solid rgba(29, 78, 216, 0.12);
  background: rgba(255, 255, 255, 0.92);
  color: var(--text);
  font-size: 0.94rem;
}

.pill strong {
  color: var(--solar-orange-dark);
}

.nav-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
  gap: 14px;
  margin-top: 22px;
}

.nav-card {
  display: block;
  text-decoration: none;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 18px;
  color: inherit;
  box-shadow: 0 10px 24px rgba(15, 23, 42, 0.04);
}

.nav-card:hover {
  border-color: rgba(29, 78, 216, 0.2);
  box-shadow: 0 14px 28px rgba(15, 23, 42, 0.08);
}

.nav-card h2,
.section-card h2 {
  margin: 0 0 8px;
  font-size: 1.1rem;
  line-height: 1.3;
}

.nav-card p,
.section-card p,
.section-card li {
  margin: 0;
  color: var(--muted);
}

.content-grid {
  display: grid;
  grid-template-columns: minmax(0, 2.15fr) minmax(260px, 0.85fr);
  gap: 22px;
  margin-top: 24px;
}

.stack {
  display: grid;
  gap: 18px;
}

.section-card,
.aside-card,
.notice-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 22px;
  padding: 22px;
  box-shadow: 0 14px 30px rgba(15, 23, 42, 0.04);
}

.section-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 10px;
  color: var(--solar-orange-dark);
  font-size: 0.84rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.section-card ul,
.section-card ol,
.aside-card ul {
  margin: 10px 0 0;
  padding-left: 22px;
}

.section-card li + li,
.aside-card li + li {
  margin-top: 8px;
}

.aside-card h3,
.notice-card h3 {
  margin-top: 0;
  margin-bottom: 8px;
  font-size: 1rem;
}

.notice-card {
  background: var(--surface-tint);
  border-color: rgba(249, 115, 22, 0.18);
}

.notice-card.success {
  background: #f0fdf4;
  border-color: rgba(22, 163, 74, 0.18);
}

.cta-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 12px;
  color: var(--link-blue);
  font-weight: 700;
  text-decoration: none;
}

.footer {
  margin-top: 28px;
  color: var(--muted);
  font-size: 0.94rem;
}

.footer a {
  text-decoration: none;
}

@media (max-width: 860px) {
  .content-grid {
    grid-template-columns: 1fr;
  }

  .hero {
    padding: 22px;
  }

  .brand-row {
    align-items: flex-start;
  }
}