/* ========================================
   djf.co.jp Corporate Site — Style
   ======================================== */

/* ---------- Reset & Base ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --c-black: #0a0a0a;
  --c-dark: #141418;
  --c-gray-900: #1a1a22;
  --c-gray-800: #24242e;
  --c-gray-700: #3a3a48;
  --c-gray-400: #8888a0;
  --c-gray-200: #c8c8d8;
  --c-white: #f8f8fc;
  --c-accent: #b08d57;
  --c-accent-light: #d4b87a;
  --c-accent-dark: #8a6d3b;
  --c-blue: #4a6fa5;
  --font-sans: 'Inter', 'Noto Sans JP', -apple-system, BlinkMacSystemFont, sans-serif;
  --container: 1200px;
  --gap: 2rem;
}

html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: var(--font-sans);
  background: var(--c-black);
  color: var(--c-white);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
img { max-width: 100%; display: block; }

.container { max-width: var(--container); margin: 0 auto; padding: 0 var(--gap); }
.hide-sp { display: inline; }

/* ---------- Header ---------- */
.header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  background: rgba(10,10,10,.85);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(176,141,87,.15);
  transition: background .3s;
}
.header-inner {
  max-width: var(--container); margin: 0 auto;
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 var(--gap); height: 70px;
}
.logo-text {
  font-size: 1.25rem; font-weight: 700; letter-spacing: .02em;
  color: var(--c-white);
}
.logo-tm { font-size: .6em; vertical-align: super; color: var(--c-accent); }
.nav { display: flex; gap: 1.5rem; align-items: center; }
.nav a {
  font-size: .85rem; font-weight: 500; color: var(--c-gray-200);
  transition: color .2s; letter-spacing: .02em;
}
.nav a:hover { color: var(--c-accent-light); }
.nav-cta {
  background: var(--c-accent); color: var(--c-black) !important;
  padding: .45rem 1.2rem; border-radius: 4px; font-weight: 600;
}
.nav-cta:hover { background: var(--c-accent-light); }

.hamburger {
  display: none; background: none; border: none; cursor: pointer;
  flex-direction: column; gap: 5px; padding: 8px;
}
.hamburger span {
  width: 24px; height: 2px; background: var(--c-white);
  transition: .3s;
}

/* ---------- Hero ---------- */
.hero {
  position: relative; min-height: 100vh;
  display: flex; align-items: center; justify-content: center;
  text-align: center; padding: 120px var(--gap) 80px;
}
.hero-bg {
  position: absolute; inset: 0;
  background: radial-gradient(ellipse at 30% 40%, rgba(176,141,87,.12) 0%, transparent 60%),
              radial-gradient(ellipse at 70% 70%, rgba(74,111,165,.08) 0%, transparent 50%);
}
.hero-content { position: relative; z-index: 1; max-width: 800px; }
.hero-label {
  font-size: .85rem; font-weight: 600; letter-spacing: .2em; text-transform: uppercase;
  color: var(--c-accent); margin-bottom: 1.5rem;
}
.hero-title {
  font-size: clamp(2.5rem, 6vw, 4.5rem); font-weight: 900;
  line-height: 1.15; margin-bottom: 1.5rem;
  background: linear-gradient(135deg, var(--c-white) 0%, var(--c-accent-light) 100%);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-sub {
  font-size: 1.05rem; color: var(--c-gray-200); line-height: 1.8;
  margin-bottom: 2.5rem;
}
.hero-cta { display: flex; gap: 1rem; justify-content: center; flex-wrap: wrap; }

.hero-scroll {
  position: absolute; bottom: 2rem; left: 50%; transform: translateX(-50%);
  display: flex; flex-direction: column; align-items: center; gap: .5rem;
}
.hero-scroll span { font-size: .7rem; letter-spacing: .15em; color: var(--c-gray-400); }
.hero-scroll-line {
  width: 1px; height: 40px; background: linear-gradient(to bottom, var(--c-accent), transparent);
  animation: scrollPulse 2s ease-in-out infinite;
}
@keyframes scrollPulse {
  0%, 100% { opacity: .3; } 50% { opacity: 1; }
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-block; padding: .75rem 2rem; border-radius: 4px;
  font-size: .9rem; font-weight: 600; letter-spacing: .02em;
  transition: all .25s; cursor: pointer; border: 1px solid transparent;
}
.btn-primary {
  background: var(--c-accent); color: var(--c-black);
  border-color: var(--c-accent);
}
.btn-primary:hover { background: var(--c-accent-light); border-color: var(--c-accent-light); }
.btn-outline {
  background: transparent; color: var(--c-white);
  border-color: var(--c-gray-700);
}
.btn-outline:hover { border-color: var(--c-accent); color: var(--c-accent-light); }

/* ---------- Sections ---------- */
.section { padding: 100px 0; }
.section--dark { background: var(--c-dark); }
.section--light { background: var(--c-gray-900); }
.section--accent {
  background: linear-gradient(135deg, rgba(176,141,87,.08) 0%, rgba(74,111,165,.06) 100%);
  border-top: 1px solid rgba(176,141,87,.15);
  border-bottom: 1px solid rgba(176,141,87,.15);
}
.section-label {
  font-size: .75rem; font-weight: 600; letter-spacing: .2em; text-transform: uppercase;
  color: var(--c-accent); margin-bottom: 1rem;
}
.section-title {
  font-size: clamp(1.8rem, 4vw, 2.8rem); font-weight: 800;
  line-height: 1.3; margin-bottom: 2rem;
}
.section-body { font-size: 1rem; color: var(--c-gray-200); line-height: 1.9; }
.section-body--narrow { max-width: 720px; }
.section-note {
  font-size: .95rem; color: var(--c-gray-400); margin-top: 2rem;
  max-width: 640px; text-align: center; margin-left: auto; margin-right: auto;
}
.section-cta { margin-top: 2.5rem; }

/* ---------- Stats Grid ---------- */
.stats-grid {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.5rem;
  margin-top: 3rem;
}
.stat-card {
  background: var(--c-dark); border: 1px solid var(--c-gray-800);
  border-radius: 8px; padding: 2rem; text-align: center;
}
.stat-number {
  font-size: 2rem; font-weight: 800; color: var(--c-accent-light);
  margin-bottom: .5rem;
}
.stat-desc { font-size: .85rem; color: var(--c-gray-400); line-height: 1.5; }

/* ---------- Compare Grid ---------- */
.compare-grid {
  display: flex; gap: 2rem; align-items: center; justify-content: center;
  margin-top: 2rem; flex-wrap: wrap;
}
.compare-card {
  flex: 1; min-width: 260px; max-width: 360px;
  padding: 2rem; border-radius: 8px;
}
.compare-card--old {
  background: var(--c-gray-900); border: 1px solid var(--c-gray-700);
}
.compare-card--new {
  background: rgba(176,141,87,.1); border: 1px solid var(--c-accent);
}
.compare-label {
  font-size: .8rem; font-weight: 700; letter-spacing: .1em; text-transform: uppercase;
  margin-bottom: 1rem; color: var(--c-accent-light);
}
.compare-card--old .compare-label { color: var(--c-gray-400); }
.compare-card li {
  padding: .4rem 0; font-size: .95rem; color: var(--c-gray-200);
  border-bottom: 1px solid rgba(255,255,255,.05);
}
.compare-vs {
  font-size: 1.2rem; font-weight: 800; color: var(--c-accent);
  flex-shrink: 0;
}

/* ---------- Value Grid ---------- */
.value-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.5rem;
  margin-top: 2rem;
}
.value-card {
  background: var(--c-dark); border: 1px solid var(--c-gray-800);
  border-radius: 8px; padding: 2rem;
  transition: border-color .3s;
}
.value-card:hover { border-color: var(--c-accent); }
.value-icon { font-size: 1.5rem; margin-bottom: 1rem; }
.value-card h3 { font-size: 1.05rem; font-weight: 700; margin-bottom: .5rem; }
.value-card p { font-size: .9rem; color: var(--c-gray-400); line-height: 1.7; }

/* ---------- Flow Steps ---------- */
.flow-steps {
  display: flex; align-items: center; justify-content: center;
  gap: 1rem; margin-top: 2.5rem; flex-wrap: wrap;
}
.flow-step {
  background: var(--c-dark); border: 1px solid var(--c-gray-800);
  border-radius: 8px; padding: 1.5rem 1.2rem; text-align: center;
  min-width: 120px;
}
.flow-num {
  font-size: 1.5rem; font-weight: 800; color: var(--c-accent);
  margin-bottom: .3rem;
}
.flow-name { font-size: .8rem; font-weight: 600; letter-spacing: .05em; }
.flow-arrow { font-size: 1.5rem; color: var(--c-accent); }
.flow-note {
  text-align: center; margin-top: 1.5rem;
  font-size: .9rem; color: var(--c-accent-light); font-weight: 600;
}

/* ---------- Platform Layers ---------- */
.platform-layers { display: flex; flex-direction: column; gap: 1rem; margin-top: 2rem; }
.platform-layer {
  background: var(--c-gray-900); border: 1px solid var(--c-gray-700);
  border-radius: 8px; padding: 1.5rem 2rem;
  display: flex; align-items: center; gap: 1.5rem; flex-wrap: wrap;
}
.platform-layer-label {
  font-size: .85rem; font-weight: 700; letter-spacing: .1em;
  color: var(--c-accent); min-width: 180px;
}
.platform-layer-tags { display: flex; gap: .5rem; flex-wrap: wrap; }
.platform-layer-tags span {
  background: var(--c-gray-800); color: var(--c-gray-200);
  padding: .35rem .8rem; border-radius: 4px; font-size: .8rem;
}

/* ---------- Bridal Features ---------- */
.bridal-features {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.5rem;
  margin-top: 2rem;
}
.bridal-feature {
  background: var(--c-dark); border: 1px solid var(--c-gray-800);
  border-radius: 8px; padding: 2rem;
}
.bridal-feature h3 { font-size: 1rem; font-weight: 700; margin-bottom: .5rem; color: var(--c-accent-light); }
.bridal-feature p { font-size: .9rem; color: var(--c-gray-400); }

/* ---------- Model Flow ---------- */
.model-flow {
  display: flex; align-items: center; justify-content: center;
  gap: 1.5rem; margin-top: 2rem; flex-wrap: wrap;
}
.model-step {
  background: var(--c-gray-900); border: 1px solid var(--c-gray-700);
  border-radius: 8px; padding: 1.2rem 1.5rem;
  font-size: .9rem; font-weight: 600; text-align: center;
}
.model-arrow { font-size: 1.5rem; color: var(--c-accent); }

/* ---------- Two Column ---------- */
.two-col { display: grid; grid-template-columns: 1fr 1fr; gap: 2rem; margin-top: 2rem; }
.two-col-item {
  background: var(--c-dark); border: 1px solid var(--c-gray-800);
  border-radius: 8px; padding: 2.5rem;
}
.two-col-item h3 {
  font-size: 1.3rem; font-weight: 700; margin-bottom: 1rem;
  color: var(--c-accent-light);
}
.two-col-item p { font-size: .95rem; color: var(--c-gray-200); }

/* ---------- Partner Types ---------- */
.partner-types {
  display: flex; gap: .8rem; flex-wrap: wrap; justify-content: center;
  margin-top: 2rem;
}
.partner-type {
  background: var(--c-dark); border: 1px solid var(--c-gray-800);
  padding: .8rem 1.5rem; border-radius: 40px;
  font-size: .85rem; font-weight: 500;
}

/* ---------- Tech Grid ---------- */
.tech-grid {
  display: grid; grid-template-columns: repeat(2, 1fr); gap: 1.5rem;
  margin-top: 2rem;
}
.tech-card {
  background: var(--c-gray-900); border: 1px solid var(--c-gray-700);
  border-radius: 8px; padding: 2rem;
  transition: border-color .3s;
}
.tech-card:hover { border-color: var(--c-accent); }
.tech-card h3 { font-size: 1.05rem; font-weight: 700; margin-bottom: .5rem; color: var(--c-accent-light); }
.tech-card p { font-size: .9rem; color: var(--c-gray-400); }

/* ---------- Yamanashi Points ---------- */
.yamanashi-points {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.5rem;
  margin-top: 2rem;
}
.yamanashi-point {
  background: var(--c-dark); border: 1px solid var(--c-gray-800);
  border-radius: 8px; padding: 2rem;
}
.yamanashi-point h3 { font-size: 1rem; font-weight: 700; margin-bottom: .5rem; color: var(--c-accent-light); }
.yamanashi-point p { font-size: .9rem; color: var(--c-gray-400); }

/* ---------- Impact Stats ---------- */
.impact-stats {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.5rem;
  margin-top: 2rem;
}
.impact-stat { text-align: center; }
.impact-number {
  font-size: 2.5rem; font-weight: 900; color: var(--c-accent-light);
  margin-bottom: .3rem;
}
.impact-desc { font-size: .9rem; color: var(--c-gray-400); }

/* ---------- R&D ---------- */
.rnd-grid {
  display: grid; grid-template-columns: repeat(2, 1fr); gap: 1.5rem;
  margin-top: 2rem;
}
.rnd-item {
  background: var(--c-gray-900); border: 1px solid var(--c-gray-700);
  border-radius: 8px; padding: 1.5rem;
}
.rnd-item h3 { font-size: 1rem; font-weight: 700; margin-bottom: .3rem; }
.rnd-item p { font-size: .85rem; color: var(--c-gray-400); }
.rnd-themes { margin-top: 2rem; }
.rnd-themes h3 { font-size: 1rem; font-weight: 700; margin-bottom: 1rem; }
.rnd-theme-tags { display: flex; gap: .5rem; flex-wrap: wrap; }
.rnd-theme-tags span {
  background: rgba(176,141,87,.12); color: var(--c-accent-light);
  padding: .4rem 1rem; border-radius: 4px; font-size: .85rem; font-weight: 500;
  border: 1px solid rgba(176,141,87,.25);
}

/* ---------- Trust Grid ---------- */
.trust-grid {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.5rem;
  margin-top: 2rem;
}
.trust-card {
  background: var(--c-dark); border: 1px solid var(--c-gray-800);
  border-radius: 8px; padding: 1.5rem; text-align: center;
}
.trust-badge {
  display: inline-block; padding: .2rem .7rem; border-radius: 4px;
  font-size: .7rem; font-weight: 700; letter-spacing: .08em;
  background: var(--c-accent); color: var(--c-black);
  margin-bottom: .8rem;
}
.trust-card h3 { font-size: .9rem; font-weight: 700; margin-bottom: .3rem; }
.trust-card p { font-size: .8rem; color: var(--c-gray-400); }

/* ---------- Roadmap ---------- */
.roadmap-timeline {
  display: flex; gap: 0; margin-top: 2rem; position: relative;
  justify-content: center; flex-wrap: wrap;
}
.roadmap-item {
  flex: 1; min-width: 160px; padding: 1.5rem;
  border-left: 2px solid var(--c-gray-700);
  position: relative;
}
.roadmap-item::before {
  content: ''; position: absolute; left: -6px; top: 1.5rem;
  width: 10px; height: 10px; border-radius: 50%;
  background: var(--c-gray-700); border: 2px solid var(--c-dark);
}
.roadmap-item--goal { border-left-color: var(--c-accent); }
.roadmap-item--goal::before { background: var(--c-accent); }
.roadmap-year {
  font-size: 1.3rem; font-weight: 800; color: var(--c-accent-light);
  margin-bottom: .5rem;
}
.roadmap-desc { font-size: .85rem; color: var(--c-gray-400); line-height: 1.6; }
.roadmap-kpi {
  display: flex; gap: 3rem; justify-content: center; margin-top: 3rem;
}
.kpi-item { text-align: center; }
.kpi-num { font-size: 1.8rem; font-weight: 800; color: var(--c-accent-light); }
.kpi-label { font-size: .85rem; color: var(--c-gray-400); margin-top: .3rem; }

/* ---------- Team ---------- */
.team-grid {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.5rem;
  margin-top: 2rem;
}
.team-card {
  background: var(--c-dark); border: 1px solid var(--c-gray-800);
  border-radius: 8px; padding: 2rem; text-align: center;
}
.team-role {
  font-size: .7rem; font-weight: 700; letter-spacing: .1em;
  color: var(--c-accent); margin-bottom: .5rem;
}
.team-card h3 { font-size: 1.2rem; font-weight: 700; margin-bottom: .2rem; }
.team-card p { font-size: .85rem; color: var(--c-gray-400); }
.team-note { font-size: .75rem !important; margin-top: .3rem; }
.team-grid--detail { grid-template-columns: repeat(2, 1fr); }
.team-grid--detail .team-card { text-align: left; }
.team-bio { font-size: .85rem !important; color: var(--c-gray-200) !important; line-height: 1.8 !important; margin-top: .8rem; }

/* ---------- Contact Form ---------- */
.contact-form {
  max-width: 720px; margin: 2rem auto 0;
}
.form-group {
  margin-bottom: 1.5rem; flex: 1;
}
.form-row {
  display: flex; gap: 1.5rem;
}
.form-group label {
  display: block; font-size: .85rem; font-weight: 600;
  margin-bottom: .5rem; color: var(--c-gray-200);
}
.required { color: var(--c-accent); }
.form-group input,
.form-group select,
.form-group textarea {
  width: 100%; padding: .85rem 1rem;
  background: var(--c-dark); border: 1px solid var(--c-gray-700);
  border-radius: 6px; color: var(--c-white);
  font-family: var(--font-sans); font-size: .95rem;
  transition: border-color .25s;
  -webkit-appearance: none; appearance: none;
}
.form-group select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%238888a0' stroke-width='1.5' fill='none'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 1rem center;
  padding-right: 2.5rem;
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none; border-color: var(--c-accent);
}
.form-group input::placeholder,
.form-group textarea::placeholder {
  color: var(--c-gray-700);
}
.form-group textarea { resize: vertical; min-height: 140px; }
.form-submit { text-align: center; margin-top: .5rem; }
.btn-lg { padding: 1rem 3.5rem; font-size: 1rem; }
.form-result {
  text-align: center; margin-top: 1.5rem;
  font-size: .95rem; font-weight: 600;
}
.form-result.success { color: #6fcf97; }
.form-result.error { color: #eb5757; }

/* ---------- Footer ---------- */
.footer {
  background: var(--c-dark); border-top: 1px solid var(--c-gray-800);
  padding: 60px 0 30px;
}
.footer-grid {
  display: grid; grid-template-columns: 2fr 1fr 1.5fr 1fr; gap: 2rem;
}
.footer-tagline {
  font-size: .8rem; color: var(--c-accent); font-weight: 600;
  letter-spacing: .1em; margin-top: .5rem;
}
.footer-copy { font-size: .85rem; color: var(--c-gray-400); margin-top: .5rem; }
.footer-nav h4 {
  font-size: .75rem; font-weight: 700; letter-spacing: .1em;
  color: var(--c-gray-400); margin-bottom: 1rem; text-transform: uppercase;
}
.footer-nav a, .footer-nav p {
  display: block; font-size: .85rem; color: var(--c-gray-200);
  margin-bottom: .5rem; line-height: 1.6;
}
.footer-nav a:hover { color: var(--c-accent-light); }
.footer-bottom {
  margin-top: 3rem; padding-top: 1.5rem;
  border-top: 1px solid var(--c-gray-800);
  display: flex; justify-content: space-between; align-items: center;
}
.footer-bottom p { font-size: .8rem; color: var(--c-gray-400); }
.footer-domain { font-weight: 700; color: var(--c-accent); }

/* ---------- News ---------- */
.news-list { margin-top: 2rem; }
.news-item {
  display: grid; grid-template-columns: 100px 1fr 160px; gap: 1.5rem;
  align-items: center; padding: 1.5rem; background: var(--c-dark);
  border: 1px solid var(--c-gray-800); border-radius: 8px;
  margin-bottom: 1rem; transition: border-color .3s; cursor: pointer;
}
.news-item:hover { border-color: var(--c-accent); }
.news-date { font-size: .85rem; font-weight: 700; color: var(--c-accent); white-space: nowrap; }
.news-tag {
  display: inline-block; padding: .15rem .6rem; border-radius: 4px;
  font-size: .65rem; font-weight: 700; letter-spacing: .05em;
  background: rgba(176,141,87,.15); color: var(--c-accent-light);
  margin-bottom: .5rem;
}
.news-content h3 { font-size: .95rem; font-weight: 700; margin-bottom: .4rem; line-height: 1.5; }
.news-content p { font-size: .82rem; color: var(--c-gray-400); line-height: 1.7; }
.news-thumb {
  width: 160px; height: 200px; object-fit: cover; border-radius: 6px;
  border: 1px solid var(--c-gray-700);
}

/* News Modal */
.news-modal {
  display: none; position: fixed; inset: 0; z-index: 2000;
  background: rgba(0,0,0,.85); align-items: center; justify-content: center;
  padding: 2rem; cursor: pointer;
}
.news-modal-inner {
  position: relative; max-width: 600px; max-height: 90vh; cursor: default;
}
.news-modal-inner img { width: 100%; height: auto; border-radius: 8px; }
.news-modal-close {
  position: absolute; top: -1rem; right: -1rem;
  width: 36px; height: 36px; border-radius: 50%;
  background: var(--c-accent); color: var(--c-black);
  border: none; font-size: 1.2rem; font-weight: 800;
  cursor: pointer; display: flex; align-items: center; justify-content: center;
}

/* ========== RESPONSIVE ========== */
@media (max-width: 1024px) {
  .stats-grid, .value-grid, .bridal-features, .yamanashi-points,
  .trust-grid, .team-grid, .contact-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 2rem; }
}

@media (max-width: 768px) {
  .hide-sp { display: none; }

  .nav {
    display: none; position: fixed; top: 70px; left: 0; right: 0; bottom: 0;
    background: rgba(10,10,10,.97); flex-direction: column;
    padding: 2rem; gap: 1.2rem; overflow-y: auto;
  }
  .nav.active { display: flex; }
  .hamburger { display: flex; }

  .hero-title { font-size: 2.2rem; }
  .hero-cta { flex-direction: column; align-items: center; }

  .section { padding: 60px 0; }
  .stats-grid, .value-grid, .bridal-features, .yamanashi-points,
  .impact-stats, .rnd-grid, .trust-grid, .team-grid,
  .contact-grid, .tech-grid { grid-template-columns: 1fr; }

  .two-col { grid-template-columns: 1fr; }
  .news-item { grid-template-columns: 1fr; }
  .news-date { margin-bottom: 0; }
  .news-thumb { width: 100%; height: auto; max-height: 300px; }

  .compare-grid { flex-direction: column; }
  .compare-vs { transform: rotate(90deg); }

  .flow-steps { flex-direction: column; }
  .flow-arrow { transform: rotate(90deg); }

  .model-flow { flex-direction: column; }
  .model-arrow { transform: rotate(90deg); }

  .roadmap-timeline { flex-direction: column; }
  .roadmap-kpi { flex-direction: column; gap: 1.5rem; }

  .form-row { flex-direction: column; gap: 0; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; gap: .5rem; text-align: center; }
}