/* ============================================================
   BBB — Section Layouts (Navy × Cyan Pop / Corporate Quality)
   ネイビーヒーロー・水色シアンアクセント・ライトブルー地セクション
   ============================================================ */

/* --- Header / Nav ------------------------------------------ */
.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 50;
  padding-block: 1.1rem;
  transition: background-color var(--duration-normal) var(--ease-out-expo),
    backdrop-filter var(--duration-normal) var(--ease-out-expo),
    border-color var(--duration-normal) var(--ease-out-expo),
    padding var(--duration-normal) var(--ease-out-expo);
  border-bottom: 1px solid transparent;
}

.site-header.is-scrolled {
  background-color: rgba(11, 26, 46, 0.94);
  backdrop-filter: blur(16px);
  border-bottom-color: rgba(0, 208, 255, 0.15);
  padding-block: 0.7rem;
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-6);
}

.brand-mark {
  display: flex;
  align-items: center;
  gap: 0.7rem;
}

.brand-mark img {
  height: 38px;
  width: auto;
}

.primary-nav ul {
  display: flex;
  gap: clamp(1rem, 2.6vw, 2.4rem);
}

.primary-nav a {
  position: relative;
  font-family: var(--font-heading);
  font-size: 0.88rem;
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: rgba(240, 248, 255, 0.62);
  transition: color var(--duration-fast) var(--ease-out-expo);
}

.primary-nav a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -5px;
  width: 100%;
  height: 1px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--duration-normal) var(--ease-out-expo);
}

.primary-nav a:hover {
  color: rgba(240, 248, 255, 0.95);
}

.primary-nav a:hover::after {
  transform: scaleX(1);
}

@media (max-width: 920px) {
  .primary-nav {
    display: none;
  }
}

/* --- Hero (flat dark navy) --------------------------------- */
.hero {
  position: relative;
  min-height: 100svh;
  display: flex;
  align-items: center;
  background: #0b1a2e;
  overflow: hidden;
  isolation: isolate;
  text-align: center;
}

/* Thin cyan rule at very bottom of hero */
.hero::after {
  content: "";
  position: absolute;
  inset: auto 0 0 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
}

.hero__glow {
  display: none;
}

.hero__watermark {
  position: absolute;
  z-index: 0;
  left: 50%;
  bottom: -8vh;
  transform: translateX(-50%);
  font-family: var(--font-heading);
  font-size: var(--text-brand);
  font-weight: 700;
  line-height: 0.8;
  letter-spacing: var(--tracking-brand);
  color: transparent;
  -webkit-text-stroke: 1px rgba(0, 208, 255, 0.06);
  user-select: none;
  pointer-events: none;
  white-space: nowrap;
}

.hero__inner {
  position: relative;
  z-index: 1;
  padding-top: 6rem;
}

/* Eyebrow-style label above lead */
.hero__lead {
  font-family: var(--font-heading);
  font-size: var(--text-sm);
  font-weight: 500;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
}

.hero__lead::before,
.hero__lead::after {
  content: "";
  display: block;
  width: 32px;
  height: 1px;
  background: var(--accent);
  opacity: 0.5;
}

.hero__brand {
  font-family: var(--font-heading);
  font-size: var(--text-brand);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 0.9;
  margin-top: var(--space-6);
  color: #ffffff;
}

.hero__brand .three-b {
  color: var(--accent);
}

.hero__name {
  display: block;
  margin-top: var(--space-4);
  font-family: var(--font-heading);
  font-size: clamp(0.78rem, 0.6rem + 0.9vw, 1rem);
  font-weight: 500;
  letter-spacing: 0.4em;
  text-transform: uppercase;
  color: rgba(240, 248, 255, 0.5);
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-4);
  margin-top: var(--space-12);
}

.hero__scroll {
  position: absolute;
  left: 50%;
  bottom: 2.2rem;
  transform: translateX(-50%);
  font-family: var(--font-heading);
  font-size: 0.65rem;
  font-weight: 500;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: rgba(240, 248, 255, 0.3);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.7rem;
  z-index: 1;
}

.hero__scroll span.line {
  width: 1px;
  height: 44px;
  background: linear-gradient(var(--accent), transparent);
  animation: scrollPulse 2.4s var(--ease-in-out) infinite;
}

@keyframes scrollPulse {
  0%,
  100% {
    transform: scaleY(0.3);
    opacity: 0.3;
    transform-origin: top;
  }
  50% {
    transform: scaleY(1);
    opacity: 1;
    transform-origin: top;
  }
}

@media (prefers-reduced-motion: reduce) {
  .hero__scroll span.line {
    animation: none;
  }
}

/* --- Shared LP section ------------------------------------- */
.lp-section {
  position: relative;
  padding-block: var(--space-section);
  overflow: hidden;
  isolation: isolate;
}

.lp-head {
  text-align: center;
}

/* Eyebrow: flanked by thin lines */
.lp-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.9rem;
  font-family: var(--font-heading);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--accent);
}

.lp-eyebrow::before,
.lp-eyebrow::after {
  content: "";
  display: block;
  width: 24px;
  height: 1px;
  background: var(--accent);
  opacity: 0.55;
}

.lp-eyebrow--center {
  display: inline-flex;
}

.dots {
  display: block;
  width: 64px;
  height: 8px;
  margin: var(--space-4) auto var(--space-6);
  background-image: radial-gradient(circle, var(--accent) 0 3.5px, transparent 3.5px);
  background-size: 22px 8px;
  background-repeat: repeat-x;
  background-position: center;
  opacity: 0.6;
}

.lp-title {
  font-family: var(--font-heading);
  font-size: var(--text-h2);
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: -0.02em;
  color: var(--text-strong);
}

.lp-title .accent {
  color: var(--accent);
}

.lp-text {
  margin: var(--space-8) auto 0;
  max-width: 600px;
  color: var(--text-muted);
  line-height: 1.9;
  font-size: var(--text-base);
}

.lp-text--tight {
  margin-top: var(--space-6);
  font-size: var(--text-sm);
}

/* --- Decorative sparks ------------------------------------- */
.deco-spark {
  position: absolute;
  z-index: 0;
  width: clamp(40px, 5.5vw, 80px);
  opacity: 0.65;
  pointer-events: none;
}

.deco-spark--a {
  top: 10%;
  right: 7%;
  color: var(--accent);
}

.deco-spark--b {
  bottom: 12%;
  left: 5%;
  color: var(--accent-2);
}

.deco-spark--c {
  top: 16%;
  left: 9%;
  color: var(--accent-3);
}

/* --- About / What is --------------------------------------- */
.about {
  background: var(--surface-base);
}

.about::before {
  content: "";
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 60px;
  height: 3px;
  background: var(--accent);
  border-radius: 2px;
}

.whatis {
  background: var(--surface-alt);
}

/* --- Field (venue cards) ----------------------------------- */
.field {
  background: var(--surface-base);
}

.venues {
  margin-top: var(--space-12);
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-6);
  max-width: 820px;
}

@media (min-width: 720px) {
  .venues {
    grid-template-columns: repeat(2, 1fr);
  }
}

.venue-card {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: var(--space-3);
  padding: var(--space-8);
  border: 1px solid var(--border-hairline);
  border-top: 3px solid var(--accent);
  border-radius: var(--radius-lg);
  background: var(--surface-card);
  transition: transform var(--duration-normal) var(--ease-out-expo),
    box-shadow var(--duration-normal) var(--ease-out-expo);
}

.venue-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 24px 48px -20px rgba(11, 26, 46, 0.18),
    0 0 0 1px rgba(0, 208, 255, 0.2);
}

.venue-card__cat {
  font-family: var(--font-heading);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.26em;
  text-transform: uppercase;
  color: var(--accent);
}

.venue-card__name {
  font-family: var(--font-heading);
  font-size: var(--text-h3);
  font-weight: 700;
  color: var(--text-strong);
  letter-spacing: -0.01em;
}

.venue-card__ig {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  margin-top: var(--space-4);
  font-family: var(--font-heading);
  font-size: var(--text-sm);
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--text-muted);
  transition: color var(--duration-fast) var(--ease-out-expo);
}

.venue-card__ig svg {
  flex-shrink: 0;
}

.venue-card__ig .arrow {
  transition: transform var(--duration-normal) var(--ease-out-expo);
}

.venue-card:hover .venue-card__ig {
  color: var(--accent);
}

.venue-card:hover .venue-card__ig .arrow {
  transform: translateX(4px);
}

/* --- Why BBB? ---------------------------------------------- */
.why {
  background: var(--surface-alt);
}

.reasons {
  margin-top: var(--space-12);
  display: grid;
  gap: 0;
}

.reason {
  text-align: center;
  font-family: var(--font-body);
  font-size: var(--text-h3);
  font-style: italic;
  letter-spacing: 0.01em;
  padding: var(--space-6) var(--space-4);
  border-top: 1px solid var(--border-hairline);
  color: var(--text-strong);
  transition: color var(--duration-fast) var(--ease-out-expo),
    background-color var(--duration-fast) var(--ease-out-expo);
}

.reason:last-of-type {
  border-bottom: 1px solid var(--border-hairline);
}

.reason:hover {
  color: var(--accent);
  background: rgba(0, 208, 255, 0.04);
}

.why__note {
  margin-top: var(--space-10, 2.5rem);
  text-align: center;
  font-family: var(--font-heading);
  font-size: var(--text-sm);
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
}

/* --- Contact (dark feature block) -------------------------- */
.contact {
  background: var(--surface-dark);
  color: var(--text-on-dark);
  text-align: center;
}

.contact .lp-eyebrow {
  color: var(--accent);
}

.contact__glow {
  position: absolute;
  inset: 0;
  z-index: 0;
  background: radial-gradient(
    55% 70% at 50% 0%,
    rgba(0, 208, 255, 0.14),
    transparent 70%
  );
  pointer-events: none;
}

.contact__inner {
  position: relative;
  z-index: 1;
}

.dots--center {
  margin-inline: auto;
}

.contact__title {
  font-family: var(--font-heading);
  font-size: var(--text-h2);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text-on-dark);
  line-height: 1.2;
}

.contact__title .accent {
  color: var(--accent);
}

.contact__lead {
  max-width: 520px;
  margin: var(--space-6) auto 0;
  color: var(--text-on-dark-muted);
  line-height: 1.9;
}

.contact__methods {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-4);
  margin-top: var(--space-12);
}

.contact__detail {
  margin-top: var(--space-6);
  font-family: var(--font-heading);
  font-size: var(--text-sm);
  color: rgba(127, 179, 212, 0.7);
  letter-spacing: 0.04em;
}

.contact__detail a {
  color: var(--text-on-dark-muted);
  transition: color var(--duration-fast) var(--ease-out-expo);
}

.contact__detail a:hover {
  color: var(--accent);
}

/* --- Company ----------------------------------------------- */
.company {
  background: var(--surface-base);
}

.company__table {
  margin-top: var(--space-12);
  width: 100%;
  border-collapse: collapse;
}

.company__table th,
.company__table td {
  text-align: left;
  padding: var(--space-6) var(--space-4);
  border-bottom: 1px solid var(--border-soft);
  vertical-align: top;
}

.company__table tr:first-child th,
.company__table tr:first-child td {
  border-top: 2px solid var(--accent);
}

.company__table th {
  width: 30%;
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: var(--text-sm);
  letter-spacing: 0.04em;
  color: var(--color-dark);
}

.company__table td {
  color: var(--text-body);
}

@media (max-width: 560px) {
  .company__table,
  .company__table tbody,
  .company__table tr,
  .company__table th,
  .company__table td {
    display: block;
    width: 100%;
  }
  .company__table th {
    border-bottom: none;
    padding-bottom: 0;
    color: var(--accent);
    font-size: var(--text-xs);
    letter-spacing: 0.12em;
    text-transform: uppercase;
  }
  .company__table td {
    padding-top: 0.4rem;
  }
}

/* --- Footer ------------------------------------------------ */
.site-footer {
  background: var(--surface-dark);
  color: var(--text-on-dark);
  padding-block: var(--space-12);
  border-top: 1px solid rgba(0, 208, 255, 0.1);
}

.site-footer__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-6);
}

.site-footer__nav ul {
  display: flex;
  flex-wrap: wrap;
  gap: clamp(0.9rem, 2vw, 1.6rem);
}

.site-footer__nav a {
  font-family: var(--font-heading);
  font-size: 0.82rem;
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: rgba(127, 179, 212, 0.6);
  transition: color var(--duration-fast) var(--ease-out-expo);
}

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

.site-footer__copy {
  font-family: var(--font-heading);
  font-size: var(--text-xs);
  letter-spacing: 0.06em;
  color: rgba(127, 179, 212, 0.45);
}