*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg:        #0a0a0f;
  --surface:   #111118;
  --border:    #1e1e2e;
  --accent:    #4af0c4;
  --accent2:   #7b6fff;
  --text:      #e8e8f0;
  --muted:     #6b6b88;
  --mono:      'DM Mono', monospace;
  --sans:      'Noto Sans JP', sans-serif;
  --title:     'Space Mono', monospace;
}

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  font-weight: 300;
  line-height: 1.7;
  overflow-x: hidden;
}

body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(rgba(74,240,196,0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(74,240,196,0.03) 1px, transparent 1px);
  background-size: 40px 40px;
  pointer-events: none;
  z-index: 0;
}

/* =====================
   NAV
   ===================== */
nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.2rem 2.5rem;
  background: rgba(10,10,15,0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.nav-logo {
  font-family: var(--title);
  font-size: 1.05rem;
  letter-spacing: 0.15em;
  color: var(--accent);
  text-decoration: none;
}

.nav-links {
  display: flex;
  gap: 2rem;
  list-style: none;
}

.nav-links a {
  font-family: var(--mono);
  font-size: 0.78rem;
  letter-spacing: 0.1em;
  color: var(--muted);
  text-decoration: none;
  transition: color 0.2s;
}
.nav-links a:hover { color: var(--accent); }

/* =====================
   HERO
   ===================== */
#hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 8rem 2.5rem 4rem;
  overflow: hidden;
}

.hero-glow {
  position: absolute;
  width: 600px; height: 600px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(74,240,196,0.08) 0%, transparent 70%);
  top: 50%; left: 50%;
  transform: translate(-50%, -60%);
  pointer-events: none;
  animation: pulse 6s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { transform: translate(-50%, -60%) scale(1); opacity: 1; }
  50%       { transform: translate(-50%, -60%) scale(1.1); opacity: 0.7; }
}

.hero-eyebrow {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.25em;
  color: var(--accent);
  text-transform: uppercase;
  margin-bottom: 1.5rem;
  opacity: 0;
  animation: fadeUp 0.8s 0.2s forwards;
}

.hero-title {
  font-family: var(--title);
  font-size: clamp(2.8rem, 8vw, 6.5rem);
  line-height: 1.05;
  letter-spacing: -0.02em;
  color: var(--text);
  max-width: 900px;
  opacity: 0;
  animation: fadeUp 0.8s 0.4s forwards;
}

.hero-title .accent  { color: var(--accent); }
.hero-title .accent2 { color: var(--accent2); }

.hero-sub {
  margin-top: 2rem;
  font-size: 1.05rem;
  color: var(--muted);
  max-width: 520px;
  line-height: 1.9;
  opacity: 0;
  animation: fadeUp 0.8s 0.6s forwards;
}

.hero-cta {
  margin-top: 3rem;
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  opacity: 0;
  animation: fadeUp 0.8s 0.8s forwards;
}

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(24px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* =====================
   BUTTONS
   ===================== */
.btn {
  font-family: var(--mono);
  font-size: 0.82rem;
  letter-spacing: 0.1em;
  padding: 0.85rem 2rem;
  border-radius: 4px;
  text-decoration: none;
  transition: all 0.25s;
  cursor: pointer;
  border: none;
}

.btn-primary {
  background: var(--accent);
  color: #0a0a0f;
  font-weight: 500;
}
.btn-primary:hover {
  background: #fff;
  transform: translateY(-2px);
  box-shadow: 0 0 30px rgba(74,240,196,0.4);
}

.btn-ghost {
  background: transparent;
  color: var(--muted);
  border: 1px solid var(--border);
}
.btn-ghost:hover {
  border-color: var(--accent);
  color: var(--accent);
  transform: translateY(-2px);
}

/* =====================
   CONCEPT
   ===================== */
#concept {
  position: relative;
  padding: 7rem 2.5rem;
  border-top: 1px solid var(--border);
}

.section-label {
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.3em;
  color: var(--accent);
  text-transform: uppercase;
  margin-bottom: 3rem;
}

.concept-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  max-width: 1000px;
}

.concept-text h2 {
  font-family: var(--title);
  font-size: clamp(1.6rem, 3vw, 2.4rem);
  line-height: 1.3;
  letter-spacing: -0.02em;
  margin-bottom: 1.5rem;
}

.concept-text p {
  color: var(--muted);
  font-size: 0.95rem;
  line-height: 2;
}

.concept-visual {
  display: flex;
  align-items: center;
  justify-content: center;
}

.container-diagram {
  position: relative;
  width: 280px;
  height: 220px;
}

.c-box {
  position: absolute;
  border: 1.5px solid;
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
}

.c-box-a {
  width: 100px; height: 64px;
  top: 20px; left: 10px;
  border-color: var(--accent);
  color: var(--accent);
  background: rgba(74,240,196,0.05);
  animation: boxPulse 3s ease-in-out infinite;
}
.c-box-b {
  width: 100px; height: 64px;
  top: 20px; right: 10px;
  border-color: var(--accent2);
  color: var(--accent2);
  background: rgba(123,111,255,0.05);
  animation: boxPulse 3s ease-in-out 1s infinite;
}
.c-box-c {
  width: 120px; height: 64px;
  bottom: 20px; left: 50%;
  transform: translateX(-50%);
  border-color: #f0a24a;
  color: #f0a24a;
  background: rgba(240,162,74,0.05);
  animation: boxPulse 3s ease-in-out 2s infinite;
}

@keyframes boxPulse {
  0%, 100% { opacity: 0.7; }
  50%       { opacity: 1; }
}

.c-line {
  position: absolute;
  background: linear-gradient(to bottom, var(--accent), var(--accent2));
  width: 1.5px;
}
.c-line-1 { height: 40px; top: 84px; left: 62px; }
.c-line-2 { height: 40px; top: 84px; right: 62px; }

.c-dot {
  position: absolute;
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--accent);
}
.c-dot-1 { top: 84px; left: 59px; }
.c-dot-2 { top: 84px; right: 59px; }

/* =====================
   PRODUCT
   ===================== */
#product {
  padding: 7rem 2.5rem;
  border-top: 1px solid var(--border);
}

.product-card {
  max-width: 720px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 2.5rem;
  position: relative;
  overflow: hidden;
  transition: border-color 0.3s;
}
.product-card:hover { border-color: rgba(74,240,196,0.3); }

.product-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(to right, var(--accent), var(--accent2));
}

/* 開発中（オレンジ） */
.product-status {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.15em;
  border-radius: 100px;
  padding: 0.3rem 0.9rem;
  margin-bottom: 1.5rem;
  color: #f0a24a;
  background: rgba(240,162,74,0.08);
  border: 1px solid rgba(240,162,74,0.2);
}

/* リリース済み（グリーン） */
.product-status--released {
  color: var(--accent);
  background: rgba(74,240,196,0.08);
  border-color: rgba(74,240,196,0.2);
}

.product-status::before {
  content: '';
  width: 6px; height: 6px;
  border-radius: 50%;
  background: currentColor;
  animation: blink 1.5s ease-in-out infinite;
}

@keyframes blink {
  0%, 100% { opacity: 1; }
  50%       { opacity: 0.3; }
}

.product-card h3 {
  font-family: var(--title);
  font-size: 1.5rem;
  letter-spacing: -0.01em;
  margin-bottom: 0.8rem;
  color: var(--text);
}

.product-card p {
  color: var(--muted);
  font-size: 0.9rem;
  line-height: 1.9;
  margin-bottom: 1.5rem;
}

.product-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
}

.tag {
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.1em;
  color: var(--accent);
  background: rgba(74,240,196,0.06);
  border: 1px solid rgba(74,240,196,0.15);
  border-radius: 4px;
  padding: 0.25rem 0.7rem;
}

.product-links {
  display: flex;
  gap: 1.5rem;
  padding-top: 1.2rem;
  border-top: 1px solid var(--border);
  flex-wrap: wrap;
  align-items: center;
}

.product-links a {
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  color: var(--muted);
  text-decoration: none;
  transition: color 0.2s;
  display: flex;
  align-items: center;
  gap: 0.4rem;
}
.product-links a:hover { color: var(--accent); }
.product-links a::before { content: '→'; font-size: 0.75rem; }

.product-links a.link-detail {
  color: var(--accent);
  border: 1px solid rgba(74,240,196,0.25);
  background: rgba(74,240,196,0.05);
  border-radius: 4px;
  padding: 0.3rem 0.8rem;
}
.product-links a.link-detail:hover {
  background: rgba(74,240,196,0.12);
}

/* =====================
   CONTACT
   ===================== */
#contact {
  padding: 7rem 2.5rem;
  border-top: 1px solid var(--border);
}

.contact-inner { max-width: 560px; }

.contact-inner h2 {
  font-family: var(--title);
  font-size: clamp(1.5rem, 3vw, 2.2rem);
  margin-bottom: 1rem;
  letter-spacing: -0.02em;
}

.contact-inner p {
  color: var(--muted);
  font-size: 0.92rem;
  margin-bottom: 2rem;
  line-height: 1.9;
}

/* =====================
   FOOTER
   ===================== */
footer {
  border-top: 1px solid var(--border);
  padding: 2.5rem 2.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
}

.footer-logo {
  font-family: var(--title);
  font-size: 0.9rem;
  color: var(--muted);
  letter-spacing: 0.15em;
}

.footer-links {
  display: flex;
  gap: 1.5rem;
  list-style: none;
}

.footer-links a {
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--muted);
  text-decoration: none;
  transition: color 0.2s;
}
.footer-links a:hover { color: var(--accent); }

.footer-copy {
  font-family: var(--mono);
  font-size: 0.68rem;
  color: var(--muted);
  opacity: 0.5;
  width: 100%;
  text-align: right;
}

/* =====================
   SCROLL REVEAL
   ===================== */
.reveal {
  opacity: 0;
  transform: translateY(32px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}
.reveal.visible {
  opacity: 1;
  transform: none;
}

/* =====================
   RESPONSIVE
   ===================== */
@media (max-width: 768px) {
  nav { padding: 1rem 1.2rem; }
  .nav-links { gap: 1.2rem; }
  .nav-links a { font-size: 0.72rem; }
  #hero, #concept, #product, #contact { padding-left: 1.2rem; padding-right: 1.2rem; }
  .concept-grid { grid-template-columns: 1fr; gap: 2.5rem; }
  .concept-visual { display: none; }
  footer { padding: 2rem 1.2rem; flex-direction: column; align-items: flex-start; }
  .footer-copy { text-align: left; }
}

@media (max-width: 480px) {
  .nav-links { display: none; }
}