/* =====================================================
   TSUNAGINATION - loading & hero imitation
   ===================================================== */

:root {
  --bg: #0a0a0a;
  --fg: #f5f5f2;
  --fg-dim: rgba(245, 245, 242, 0.6);
  --fg-faint: rgba(245, 245, 242, 0.32);
  --accent: #ff3b30;
  --font-en: "Archivo Black", "Noto Sans JP", sans-serif;
  --font-jp: "Noto Sans JP", sans-serif;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-jp);
}

body.is-loading {
  overflow: hidden;
  height: 100vh;
}

a { color: inherit; text-decoration: none; }
ul { list-style: none; margin: 0; padding: 0; }

/* ===== ローディング画面 ===== */
.loader {
  position: fixed;
  inset: 0;
  z-index: 999;
  background: var(--bg);
  color: var(--fg);
  display: flex;
  align-items: flex-end;
  overflow: hidden;
  transition: transform 0.9s cubic-bezier(0.76, 0, 0.24, 1);
}

.loader.is-done {
  transform: translateY(-100%);
}

.loader-letter {
  position: absolute;
  top: clamp(-40px, -4vw, -10px);
  left: clamp(-20px, -2vw, 0px);
  font-family: var(--font-en);
  font-size: clamp(220px, 46vw, 640px);
  line-height: 1;
  color: transparent;
  -webkit-text-stroke: 1px rgba(245, 245, 242, 0.18);
  user-select: none;
  pointer-events: none;
}

.loader-bottom {
  position: relative;
  z-index: 2;
  width: 100%;
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  padding: clamp(20px, 4vw, 48px);
  gap: 16px;
}

.loader-word {
  font-family: var(--font-en);
  font-size: clamp(14px, 1.6vw, 20px);
  letter-spacing: 0.12em;
}

.loader-count {
  font-family: var(--font-en);
  font-size: clamp(28px, 5vw, 56px);
  line-height: 1;
  font-variant-numeric: tabular-nums;
}

.loader-count::after {
  content: "%";
  font-size: 0.4em;
  margin-left: 4px;
  color: var(--fg-faint);
}

.loader-bar {
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 2px;
  background: rgba(245, 245, 242, 0.14);
}

.loader-bar span {
  display: block;
  height: 100%;
  width: 0%;
  background: var(--accent);
  transition: width 0.15s linear;
}

/* ===== ヘッダー ===== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: clamp(16px, 2.4vw, 28px) 0;
  opacity: 0;
  transform: translateY(-16px);
  transition: opacity 0.8s ease, transform 0.8s ease, background 0.3s ease, padding 0.3s ease;
}

.site-header.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.site-header.is-scrolled {
  background: rgba(10, 10, 10, 0.85);
  backdrop-filter: blur(8px);
  padding-top: clamp(10px, 1.4vw, 16px);
  padding-bottom: clamp(10px, 1.4vw, 16px);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand {
  font-family: var(--font-en);
  font-size: clamp(15px, 1.6vw, 19px);
  letter-spacing: 0.08em;
}

.main-nav ul {
  display: flex;
  align-items: center;
  gap: clamp(20px, 2.6vw, 40px);
}

.main-nav a {
  font-family: var(--font-en);
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--fg-dim);
  transition: color 0.2s ease;
}

.main-nav a:hover { color: var(--fg); }

.nav-cta {
  border: 1px solid var(--fg-faint);
  padding: 8px 18px;
  border-radius: 999px;
  color: var(--fg) !important;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  background: none;
  border: none;
  cursor: pointer;
}

.nav-toggle span {
  display: block;
  height: 1px;
  background: var(--fg);
  width: 100%;
  transition: transform 0.3s ease, opacity 0.3s ease;
}

/* ===== ヒーロー ===== */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  overflow: hidden;
  padding-top: clamp(90px, 12vh, 140px);
  padding-bottom: clamp(40px, 6vh, 64px);
  background:
    radial-gradient(ellipse at 80% 0%, rgba(255, 59, 48, 0.12), transparent 55%),
    var(--bg);
}

.hero-ticker {
  position: absolute;
  top: clamp(74px, 10vh, 108px);
  left: 0;
  width: 100%;
  overflow: hidden;
  border-top: 1px solid rgba(245, 245, 242, 0.12);
  border-bottom: 1px solid rgba(245, 245, 242, 0.12);
  padding: 10px 0;
}

.hero-ticker-track {
  display: flex;
  width: max-content;
  animation: ticker 32s linear infinite;
}

.hero-ticker-track span {
  font-size: clamp(11px, 1.2vw, 13px);
  letter-spacing: 0.04em;
  color: var(--fg-dim);
  white-space: nowrap;
  padding-right: 48px;
  position: relative;
}

.hero-ticker-track span::after {
  content: "//";
  color: var(--accent);
  margin-left: 48px;
}

@keyframes ticker {
  from { transform: translateX(0); }
  to { transform: translateX(-50%); }
}

.hero-inner {
  position: relative;
  z-index: 2;
  padding-top: clamp(28px, 5vh, 56px);
}

.hero-eyebrow {
  font-family: var(--font-en);
  font-size: clamp(11px, 1.1vw, 13px);
  letter-spacing: 0.14em;
  color: var(--fg-dim);
  line-height: 1.6;
  margin: 0 0 clamp(16px, 2.4vw, 28px);
}

.hero-title {
  margin: 0 0 clamp(20px, 3vw, 32px);
  font-family: var(--font-en);
  font-weight: 400;
  line-height: 1.04;
  text-transform: uppercase;
  text-wrap: balance;
}

.hero-row {
  display: block;
  overflow: hidden;
}

.hero-row .reveal {
  font-size: clamp(26px, 4.6vw, 64px);
}

.hero-title em {
  font-style: normal;
  color: var(--accent);
}

.reveal {
  display: inline-block;
  opacity: 0;
  transform: translateY(100%);
  transition: opacity 0.7s cubic-bezier(0.16, 1, 0.3, 1), transform 0.7s cubic-bezier(0.16, 1, 0.3, 1);
}

body.hero-ready .reveal {
  opacity: 1;
  transform: translateY(0);
}

body.hero-ready .hero-row:nth-child(1) .reveal { transition-delay: 0.05s; }
body.hero-ready .hero-row:nth-child(2) .reveal { transition-delay: 0.15s; }
body.hero-ready .hero-row:nth-child(3) .reveal { transition-delay: 0.25s; }
body.hero-ready .hero-row:nth-child(4) .reveal { transition-delay: 0.35s; }
body.hero-ready .hero-row:nth-child(5) .reveal { transition-delay: 0.45s; }
body.hero-ready .hero-row:nth-child(6) .reveal { transition-delay: 0.55s; }
body.hero-ready .hero-lead.reveal { transition-delay: 0.68s; }

.hero-lead {
  max-width: 640px;
  font-size: clamp(14px, 1.5vw, 16px);
  line-height: 1.9;
  color: var(--fg-dim);
  margin: 0 0 clamp(32px, 5vw, 56px);
}

.hero-scroll {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  opacity: 0;
  animation: fadeIn 1s ease forwards;
  animation-delay: 1.1s;
}

.hero-scroll span:first-child {
  font-family: var(--font-en);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--fg-faint);
}

.hero-scroll-line {
  width: 1px;
  height: 40px;
  background: var(--fg-faint);
  position: relative;
  overflow: hidden;
}

.hero-scroll-line::after {
  content: "";
  position: absolute;
  top: -100%;
  left: 0;
  width: 100%;
  height: 100%;
  background: var(--accent);
  animation: scrollLine 1.8s ease-in-out infinite;
}

@keyframes scrollLine {
  0% { top: -100%; }
  60% { top: 100%; }
  100% { top: 100%; }
}

@keyframes fadeIn {
  to { opacity: 1; }
}

.pc-only { display: inline; }

/* ===== レスポンシブ ===== */
@media screen and (max-width: 767px) {
  .pc-only { display: none; }

  .main-nav {
    position: fixed;
    top: 0;
    right: 0;
    height: 100vh;
    width: min(78vw, 320px);
    background: #0a0a0a;
    transform: translateX(100%);
    transition: transform 0.35s ease;
    display: flex;
    align-items: center;
    padding: 0 32px;
    border-left: 1px solid rgba(245, 245, 242, 0.1);
  }

  .main-nav.is-open { transform: translateX(0); }

  .main-nav ul {
    flex-direction: column;
    align-items: flex-start;
    gap: 28px;
    width: 100%;
  }

  .nav-toggle { display: flex; }

  .nav-toggle.is-open span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
  .nav-toggle.is-open span:nth-child(2) { opacity: 0; }
  .nav-toggle.is-open span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

  .hero-ticker { top: 66px; }
  .hero { padding-top: 110px; }
}

@media screen and (min-width: 1024px) {
  .hero-row--vertical { align-items: flex-end; }
}