:root {
  --ink-900: #0b1c2e;
  --ink-800: #13263c;
  --ink-700: #1a3250;
  --paper-100: #f7f8fb;
  --paper-200: #edf0f5;
  --paper-300: #e3e7ef;
  --stone-400: #8b95a7;
  --stone-700: #2f3a4a;
  --accent-cobalt: #2f5ea1;
  --accent-jade: #2f7a6b;
  --accent-slate: #556277;
  --radius: 16px;
  --shadow: 0 24px 60px rgba(11, 28, 46, 0.12);
  --shadow-soft: 0 10px 28px rgba(11, 28, 46, 0.08);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Noto Sans JP", "Hiragino Kaku Gothic ProN", "Hiragino Sans", "Yu Gothic", "Meiryo", sans-serif;
  color: var(--stone-700);
  background:
    radial-gradient(circle at top left, rgba(47, 94, 161, 0.08), transparent 45%),
    radial-gradient(circle at bottom right, rgba(47, 122, 107, 0.06), transparent 55%),
    var(--paper-100);
  min-height: 100vh;
}

a {
  color: inherit;
  text-decoration: none;
}

.container {
  width: min(1120px, 92vw);
  margin: 0 auto;
}

.site-header {
  background: rgba(247, 249, 252, 0.92);
  color: var(--ink-900);
  position: sticky;
  top: 0;
  z-index: 10;
  border-bottom: 1px solid var(--paper-300);
  backdrop-filter: blur(10px);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 0;
  gap: 24px;
  flex-wrap: wrap;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand-text {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.brand-logo {
  width: 44px;
  height: 44px;
  object-fit: contain;
  border-radius: 12px;
  background: var(--paper-200);
  padding: 6px;
}

.brand-title {
  font-size: 19px;
  font-weight: 600;
  letter-spacing: 0.02em;
}

.brand-subtitle {
  font-size: 12px;
  color: var(--stone-400);
  text-transform: uppercase;
}

.site-nav {
  display: flex;
  gap: 20px;
  font-size: 14px;
}

.site-nav a {
  color: var(--ink-800);
  transition: color 0.2s ease;
}

.site-nav a:hover {
  color: var(--accent-cobalt);
}

.hero {
  background-image:
    url("../images/finance-light.svg"),
    linear-gradient(135deg, rgba(247, 249, 252, 0.6) 0%, rgba(231, 237, 246, 0.55) 100%);
  background-size: cover;
  background-position: center;
  background-blend-mode: multiply;
  color: var(--ink-900);
  padding: 78px 0 86px;
  position: relative;
  overflow: hidden;
}

.page-hero {
  background-image:
    url("../images/finance-light.svg"),
    linear-gradient(140deg, rgba(247, 249, 252, 0.6) 0%, rgba(231, 237, 246, 0.55) 100%);
  background-size: cover;
  background-position: center;
  background-blend-mode: multiply;
  color: var(--ink-900);
  padding: 58px 0 64px;
  border-bottom: 1px solid rgba(14, 26, 42, 0.08);
}

.page-hero-inner {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 32px;
  align-items: center;
}

.page-hero-kicker {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.24em;
  color: rgba(15, 32, 55, 0.6);
  margin-bottom: 10px;
}

.page-hero h1 {
  margin: 0 0 12px;
  font-size: clamp(30px, 4vw, 44px);
}

.page-hero-text {
  font-size: 16px;
  color: rgba(15, 32, 55, 0.8);
  line-height: 1.7;
}

.page-hero-panel {
  background: rgba(255, 255, 255, 0.7);
  border: 1px solid rgba(14, 26, 42, 0.08);
  border-radius: var(--radius);
  padding: 20px 22px;
  backdrop-filter: blur(10px);
}

.page-hero-label {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.24em;
  color: rgba(15, 32, 55, 0.6);
  margin-bottom: 8px;
}

.hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: linear-gradient(120deg, rgba(255, 255, 255, 0.25) 0%, transparent 65%);
  pointer-events: none;
}

.hero-inner {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  align-items: center;
  gap: 46px;
}

.hero h1 {
  font-size: clamp(30px, 4vw, 44px);
  margin-bottom: 12px;
}

.subtitle {
  font-size: 15px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: rgba(15, 32, 55, 0.7);
  margin: 0 0 12px;
}

.tagline {
  font-size: 16px;
  margin-bottom: 24px;
  color: rgba(15, 32, 55, 0.8);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 24px;
  border-radius: 999px;
  background: var(--accent-cobalt);
  color: #fff;
  font-weight: 500;
  transition: background 0.2s ease, transform 0.2s ease;
}

.btn:hover {
  background: #2a548f;
  transform: translateY(-1px);
}

.hero-panel {
  background: rgba(255, 255, 255, 0.7);
  border: 1px solid rgba(14, 26, 42, 0.08);
  border-radius: var(--radius);
  padding: 26px;
  backdrop-filter: blur(10px);
}

.hero-label {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  color: rgba(15, 32, 55, 0.6);
  margin-bottom: 10px;
}

.hero-text {
  font-size: 16px;
  line-height: 1.7;
  color: rgba(15, 32, 55, 0.85);
}

.section {
  padding: 64px 0;
}

.section-soft {
  background: linear-gradient(180deg, rgba(237, 240, 245, 0.6), rgba(247, 248, 251, 0.4));
  border-top: 1px solid var(--paper-300);
  border-bottom: 1px solid var(--paper-300);
}

.section-title {
  font-size: 20px;
  font-weight: 600;
  color: var(--ink-900);
  margin-bottom: 24px;
}

.grid {
  display: grid;
  gap: 20px;
}

.cards {
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

.category-grid {
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

.category-card {
  padding: 26px;
  border-radius: var(--radius);
  border: 1px solid var(--paper-300);
  background: #fff;
  box-shadow: var(--shadow-soft);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.category-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow);
}

.category-title {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 6px;
}

.category-sub {
  color: var(--stone-700);
}

.category-desc {
  margin-top: 12px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--stone-400);
}

.card {
  background: #fff;
  padding: 22px;
  border-radius: var(--radius);
  border: 1px solid var(--paper-300);
  box-shadow: var(--shadow-soft);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow);
}

.card-header {
  display: flex;
  gap: 10px;
  align-items: center;
  margin-bottom: 10px;
}

.tag {
  display: inline-flex;
  align-items: center;
  padding: 4px 10px;
  border-radius: 999px;
  font-size: 12px;
  background: var(--paper-200);
  color: var(--ink-800);
  font-weight: 500;
}

.tag.cat-futures {
  background: rgba(58, 110, 165, 0.15);
  color: var(--accent-cobalt);
}

.tag.cat-fx {
  background: rgba(63, 122, 107, 0.15);
  color: var(--accent-jade);
}

.tag.cat-options {
  background: rgba(92, 111, 141, 0.15);
  color: #5c6f8d;
}

.status {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 4px 10px;
  border-radius: 999px;
  background: var(--paper-200);
  color: var(--stone-700);
}

.status.upcoming {
  background: rgba(47, 94, 161, 0.16);
  color: var(--accent-cobalt);
}

.status.past {
  background: rgba(85, 98, 119, 0.16);
  color: var(--accent-slate);
}

.card-title {
  font-size: 17px;
  margin: 6px 0 10px;
  color: var(--ink-900);
}

.card-title a {
  color: inherit;
  transition: color 0.2s ease;
}

.card-title a:hover {
  color: var(--accent-cobalt);
}

.card-meta {
  font-size: 13px;
  color: var(--stone-700);
  display: grid;
  gap: 4px;
}

.announcement-card .card-meta {
  margin-top: 8px;
}

.single {
  background: #fff;
  padding: 32px;
  border-radius: var(--radius);
  border: 1px solid var(--paper-300);
  box-shadow: var(--shadow);
}

.single-banner {
  background-size: cover;
  background-position: center;
  border-radius: 16px;
  height: 140px;
  margin-bottom: 22px;
  border: 1px solid var(--paper-300);
}

.single-banner--seminar {
  background-image:
    url("../images/finance-banner.svg"),
    linear-gradient(140deg, rgba(247, 249, 252, 0.7) 0%, rgba(231, 237, 246, 0.6) 100%);
}

.single-banner--tech {
  background-image:
    url("../images/tech-banner.svg"),
    linear-gradient(140deg, rgba(248, 250, 252, 0.7) 0%, rgba(230, 238, 249, 0.6) 100%);
}

.single-header {
  display: flex;
  gap: 12px;
  align-items: center;
  margin-bottom: 16px;
}

.single h1 {
  margin: 0 0 12px;
  color: var(--ink-900);
}

.single-meta {
  display: grid;
  gap: 6px;
  font-size: 14px;
  color: var(--stone-700);
  margin-bottom: 24px;
}

.single-body {
  line-height: 1.8;
  color: var(--stone-700);
}

.single-body iframe {
  margin-top: 16px;
  border-radius: 12px;
  border: 1px solid var(--paper-300);
  box-shadow: var(--shadow-soft);
  background: #fff;
}

.info-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
  margin: 20px 0 28px;
}

.info-card {
  background: #fff;
  border: 1px solid var(--paper-300);
  border-radius: 14px;
  padding: 16px 18px;
  box-shadow: var(--shadow-soft);
}

.info-label {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--stone-400);
  margin-bottom: 8px;
}

.info-value {
  font-size: 15px;
  color: var(--ink-900);
  line-height: 1.6;
}

.intro {
  color: var(--stone-700);
  margin-top: 12px;
}

.empty {
  padding: 20px;
  background: var(--paper-200);
  border-radius: var(--radius);
  color: var(--stone-700);
}

.cat-futures {
  border-left: 4px solid var(--accent-cobalt);
}

.cat-fx {
  border-left: 4px solid var(--accent-jade);
}

.cat-options {
  border-left: 4px solid #5c6f8d;
}

.site-footer {
  background: var(--ink-900);
  color: rgba(255, 255, 255, 0.8);
  padding: 40px 0;
  margin-top: 40px;
}

.site-main {
  padding-bottom: 40px;
}

.footer-inner {
  display: grid;
  gap: 20px;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

.footer-title {
  font-weight: 600;
  color: #fff;
}

.footer-disclaimer p {
  margin: 6px 0 0;
  line-height: 1.7;
}

@media (max-width: 720px) {
  .site-nav {
    flex-wrap: wrap;
    gap: 12px;
  }

  .hero {
    padding: 50px 0 60px;
  }

  .single {
    padding: 24px;
  }
}