/* ===================================================
   Design Tokens
=================================================== */
:root {
  --gold:      #c9a227;
  --gold-lt:   #e8c55a;
  --gold-dim:  rgba(201, 162, 39, 0.12);
  --teal:      #00d4d4;
  --teal-dim:  rgba(0, 212, 212, 0.12);
  --dark:      #06060e;
  --dark-2:    #0c0c1a;
  --serif:     'Noto Serif JP', serif;
  --sans:      'Noto Sans JP', sans-serif;
  --ease-out:  cubic-bezier(0.16, 1, 0.3, 1);
}

/* ===================================================
   Base
=================================================== */
html { scroll-behavior: smooth; }

body {
  font-family: var(--sans);
  background: var(--dark);
  color: #dddde8;
}

/* ===================================================
   Hero
=================================================== */
#hero-video {
  filter: brightness(0.5) saturate(0.85);
}

/* subtle cyber grid over video */
.hero-grid {
  background-image:
    linear-gradient(rgba(0, 212, 212, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 212, 212, 0.035) 1px, transparent 1px);
  background-size: 72px 72px;
  pointer-events: none;
  z-index: 5;
}

.hero-content {
  animation: heroIn 1.6s var(--ease-out) forwards;
  opacity: 0;
  z-index: 10;
}

@keyframes heroIn {
  from { opacity: 0; transform: translateY(28px); }
  to   { opacity: 1; transform: translateY(0); }
}

.hero-title {
  font-family: var(--serif);
  font-size: clamp(2.4rem, 6.5vw, 5.2rem);
  font-weight: 900;
  line-height: 1.25;
  letter-spacing: 0.04em;
  text-shadow: 0 4px 48px rgba(0, 0, 0, 0.9);
}

/* ===================================================
   Decorative elements
=================================================== */
.gold-bar {
  width: 72px;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--gold), transparent);
  display: block;
}

.divider-gold {
  width: 56px;
  height: 1px;
  background: var(--gold);
  display: block;
}

/* ===================================================
   Buttons
=================================================== */
.btn-gold {
  display: inline-block;
  padding: 14px 40px;
  background: var(--gold);
  color: var(--dark);
  font-family: var(--sans);
  font-weight: 600;
  font-size: 0.95rem;
  letter-spacing: 0.07em;
  text-decoration: none;
  border-radius: 2px;
  transition: background 0.3s ease, box-shadow 0.3s ease, transform 0.25s ease;
}

.btn-gold:hover {
  background: var(--gold-lt);
  box-shadow: 0 0 36px rgba(201, 162, 39, 0.5);
  transform: translateY(-2px);
}

.btn-outline {
  display: inline-block;
  padding: 13px 40px;
  border: 1px solid var(--gold);
  color: var(--gold);
  font-family: var(--sans);
  font-weight: 400;
  font-size: 0.95rem;
  letter-spacing: 0.07em;
  text-decoration: none;
  border-radius: 2px;
  transition: background 0.3s ease, box-shadow 0.3s ease, transform 0.25s ease;
}

.btn-outline:hover {
  background: var(--gold-dim);
  box-shadow: 0 0 24px rgba(201, 162, 39, 0.22);
  transform: translateY(-2px);
}

/* ===================================================
   Scroll hint
=================================================== */
.scroll-hint { animation: scrollBounce 2.4s ease-in-out infinite; }

.scroll-arrow {
  width: 18px;
  height: 18px;
  border-right: 2px solid rgba(201, 162, 39, 0.55);
  border-bottom: 2px solid rgba(201, 162, 39, 0.55);
  transform: rotate(45deg);
}

@keyframes scrollBounce {
  0%, 100% { transform: translateX(-50%) translateY(0);    opacity: 0.7; }
  50%       { transform: translateX(-50%) translateY(10px); opacity: 0.3; }
}

/* ===================================================
   Section typography
=================================================== */
.label-mono {
  font-family: 'Courier New', monospace;
  font-size: 0.72rem;
  letter-spacing: 0.28em;
  color: var(--teal);
  text-transform: uppercase;
}

.section-title {
  font-family: var(--serif);
  font-size: clamp(1.9rem, 4vw, 3.2rem);
  font-weight: 700;
  color: #e4e4f0;
}

/* ===================================================
   Feature blocks
=================================================== */
.feat-num {
  font-family: 'Courier New', monospace;
  font-size: clamp(3rem, 6vw, 5rem);
  font-weight: 700;
  color: transparent;
  -webkit-text-stroke: 1px rgba(201, 162, 39, 0.22);
  line-height: 1;
  display: block;
  margin-bottom: -4px;
}

.feat-title {
  font-family: var(--serif);
  font-size: clamp(1.6rem, 3vw, 2.4rem);
  font-weight: 700;
  line-height: 1.4;
  color: #e4e4f0;
  margin-bottom: 20px;
}

.feat-desc {
  font-size: 0.95rem;
  color: #7a7a9a;
  line-height: 2.1;
  margin-bottom: 22px;
}

.feat-list {
  list-style: none;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.feat-list li {
  font-size: 0.875rem;
  color: #6a6a8a;
  padding-left: 22px;
  position: relative;
  line-height: 1.7;
}

.feat-list li::before {
  content: '▸';
  color: var(--teal);
  position: absolute;
  left: 0;
}

/* ===================================================
   Image wrappers
=================================================== */
.img-wrap {
  position: relative;
  border-radius: 8px;
  overflow: hidden;
  /* teal border glow on hover */
  box-shadow: 0 0 0 1px rgba(0, 212, 212, 0.15);
  transition: box-shadow 0.4s ease;
}

.img-wrap:hover {
  box-shadow: 0 0 0 1px rgba(0, 212, 212, 0.4),
              0 20px 60px rgba(0, 0, 0, 0.5);
}

.img-wrap img {
  display: block;
  width: 100%;
  height: auto;
  transition: transform 0.7s var(--ease-out);
}

.img-wrap:hover img { transform: scale(1.04); }

/* glow beneath image */
.img-glow {
  position: absolute;
  bottom: -20px;
  left: 50%;
  transform: translateX(-50%);
  width: 70%;
  height: 60px;
  background: radial-gradient(ellipse at center, rgba(0, 212, 212, 0.18), transparent 70%);
  pointer-events: none;
  z-index: 2;
}

/* ===================================================
   Roadmap
=================================================== */
.roadmap-bg {
  background: linear-gradient(180deg, var(--dark) 0%, var(--dark-2) 50%, var(--dark) 100%);
}

/* ---- timeline layout ---- */
/* padding-left leaves space for the dot + line.
   line center = 20px from timeline left edge.
   dot width = 32px → left in tl-item = (20 - 16) - 56 = -52px  */
.timeline {
  position: relative;
  padding-left: 56px;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 20px;
  top: 16px;
  bottom: 16px;
  width: 1px;
  background: linear-gradient(180deg, var(--gold) 0%, rgba(201, 162, 39, 0.03) 100%);
}

.tl-item {
  position: relative;
  padding-bottom: 44px;
}

.tl-item:last-child { padding-bottom: 0; }

.tl-dot {
  position: absolute;
  left: -52px;
  top: 3px;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  border: 1px solid rgba(201, 162, 39, 0.28);
  background: var(--dark);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: box-shadow 0.4s ease;
}

.tl-dot::after {
  content: '';
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: rgba(201, 162, 39, 0.28);
  transition: background 0.4s ease;
}

.tl-dot.active {
  border-color: var(--gold);
  box-shadow: 0 0 22px rgba(201, 162, 39, 0.4);
}

.tl-dot.active::after { background: var(--gold); }

.tl-phase {
  font-family: 'Courier New', monospace;
  font-size: 0.68rem;
  color: var(--teal);
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.tl-title {
  font-family: var(--serif);
  font-size: 1.15rem;
  font-weight: 700;
  color: #ccccdc;
  margin: 6px 0 8px;
}

.tl-desc {
  font-size: 0.875rem;
  color: #5a5a7a;
  line-height: 2;
}

/* roadmap items stagger */
.tl-item:nth-child(2).reveal { transition-delay: 0.08s; }
.tl-item:nth-child(3).reveal { transition-delay: 0.16s; }
.tl-item:nth-child(4).reveal { transition-delay: 0.24s; }

/* ===================================================
   Footer
=================================================== */
.footer-name {
  font-family: var(--serif);
  font-size: 1.5rem;
  font-weight: 700;
  color: #ccccdc;
}

/* ===================================================
   Scroll-reveal animations (Intersection Observer)
=================================================== */
.reveal {
  opacity: 0;
  transform: translateY(44px);
  transition:
    opacity  0.9s var(--ease-out),
    transform 0.9s var(--ease-out);
}

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

/* Feature rows: image side slides from its direction */
.feature-row:nth-child(odd)  .img-wrap { transform: translateX(-24px); }
.feature-row:nth-child(even) .img-wrap { transform: translateX(24px);  }

.feature-row .img-wrap {
  opacity: 0;
  transition:
    opacity   0.9s var(--ease-out),
    transform 0.9s var(--ease-out),
    box-shadow 0.4s ease;
}

.feature-row.is-visible .img-wrap {
  opacity: 1;
  transform: translateX(0) !important;
}

/* text side fades up with slight delay */
.feature-row > div:last-child {
  opacity: 0;
  transform: translateY(24px);
  transition:
    opacity   0.9s 0.18s var(--ease-out),
    transform 0.9s 0.18s var(--ease-out);
}

.feature-row.is-visible > div:last-child {
  opacity: 1;
  transform: translateY(0);
}

/* ===================================================
   Responsive
=================================================== */
@media (max-width: 768px) {
  .feat-num { font-size: 2.8rem; }

  .timeline { padding-left: 48px; }
  .timeline::before { left: 16px; }
  /* recalc dot: (16 - 16) - 48 = -48px */
  .tl-dot { left: -48px; }
}