/* Future Tech Summit 2026 - 紺 × 銀 × フォーマル / カンファレンス */

* { box-sizing: border-box; margin: 0; padding: 0; }
:root {
  --bg: #0B1228;
  --bg-soft: #131D3C;
  --ink: #F0F2F8;
  --ink-soft: #B4BCD0;
  --mute: #6E7896;
  --silver: #C8CFE2;
  --accent: #4E8AFF;
  --accent-2: #6AF2D8;
  --rule: rgba(240, 242, 248, 0.10);
}
html, body {
  background: var(--bg);
  color: var(--ink);
  font-family: "IBM Plex Sans", "Noto Sans JP", sans-serif;
  -webkit-font-smoothing: antialiased;
  font-feature-settings: "palt" 1;
  line-height: 1.7;
  overflow-x: hidden;
}
a { color: inherit; text-decoration: none; }
em { font-style: normal; color: var(--accent-2); }

.cont { max-width: 1280px; margin: 0 auto; padding: 0 32px; }
.eb {
  font-family: "IBM Plex Mono", monospace;
  font-size: 11px;
  letter-spacing: 0.32em;
  color: var(--accent-2);
  text-transform: uppercase;
  font-weight: 500;
  display: inline-block;
  margin-bottom: 18px;
}

/* HEADER */
.hd {
  position: sticky; top: 0; z-index: 50;
  padding: 14px 32px;
  background: rgba(11, 18, 40, 0.88);
  border-bottom: 1px solid var(--rule);
  backdrop-filter: blur(8px);
}
.hd-in { display: flex; justify-content: space-between; align-items: center; max-width: 1360px; margin: 0 auto; gap: 24px; }
.brand { display: flex; gap: 12px; align-items: center; }
.bk {
  width: 36px; height: 36px;
  display: grid; place-items: center;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: var(--bg);
  font-size: 16px;
  font-weight: 700;
  border-radius: 6px;
}
.bw { display: flex; flex-direction: column; line-height: 1.2; }
.b1 { font-family: "IBM Plex Sans", sans-serif; font-size: 13px; letter-spacing: 0.16em; font-weight: 600; }
.b2 { font-family: "IBM Plex Mono", monospace; font-size: 10px; color: var(--ink-soft); letter-spacing: 0.14em; }
.nav { display: flex; gap: 24px; }
.nav a { font-family: "IBM Plex Mono", monospace; font-size: 12px; letter-spacing: 0.18em; color: var(--ink-soft); transition: color .2s; text-transform: uppercase; }
.nav a:hover { color: var(--accent-2); }
.cta {
  padding: 10px 22px;
  background: var(--accent);
  color: var(--ink);
  font-family: "IBM Plex Mono", monospace;
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  font-weight: 500;
  border-radius: 4px;
  transition: background .25s, transform .2s;
}
.cta:hover { background: var(--accent-2); color: var(--bg); transform: translateY(-2px); }
@media (max-width: 800px) { .nav { display: none; } }

/* HERO */
.hero {
  position: relative;
  min-height: 95vh;
  display: grid; place-items: center;
  padding: 100px 0 80px;
  overflow: hidden;
  background: linear-gradient(180deg, var(--bg) 0%, #0F1A38 100%);
}
.hero-grid-bg {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(78,138,255,0.07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(78,138,255,0.07) 1px, transparent 1px);
  background-size: 80px 80px;
  mask-image: radial-gradient(ellipse at center top, black 30%, transparent 90%);
}
.hero-shine {
  position: absolute; inset: 0;
  background:
    radial-gradient(60% 40% at 80% 20%, rgba(106,242,216,0.18), transparent 70%),
    radial-gradient(50% 50% at 12% 75%, rgba(78,138,255,0.18), transparent 70%);
}
.hero-in { position: relative; width: 100%; }
.hero-meta {
  display: flex; gap: 14px; align-items: center;
  font-family: "IBM Plex Mono", monospace;
  font-size: 12px;
  letter-spacing: 0.22em;
  color: var(--accent-2);
  text-transform: uppercase;
  margin-bottom: 32px;
  flex-wrap: wrap;
}
.meta-sep { color: var(--mute); }
.meta-i { color: var(--silver); }
.hero-h {
  font-family: "IBM Plex Sans", sans-serif;
  font-weight: 300;
  font-size: clamp(56px, 11vw, 160px);
  line-height: 0.92;
  letter-spacing: -0.04em;
  color: var(--ink);
}
.hero-h .line { display: block; }
.hero-h em {
  font-weight: 700;
  background: linear-gradient(135deg, var(--accent-2), var(--accent));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero-sub {
  margin-top: 36px;
  max-width: 640px;
  font-size: 15px;
  line-height: 1.95;
  color: var(--ink-soft);
}

/* COUNTDOWN */
.countdown {
  margin: 44px 0 0;
  display: flex;
  gap: 18px;
  flex-wrap: wrap;
  padding-top: 28px;
  border-top: 1px solid var(--rule);
  align-items: baseline;
}
.cd-cell { display: flex; align-items: baseline; gap: 8px; }
.cd-num {
  font-family: "IBM Plex Mono", monospace;
  font-weight: 600;
  font-size: 40px;
  color: var(--ink);
  font-variant-numeric: tabular-nums;
  line-height: 1.0;
}
.cd-lab {
  font-family: "IBM Plex Mono", monospace;
  font-size: 10px;
  letter-spacing: 0.28em;
  color: var(--mute);
  text-transform: uppercase;
}
.cd-sep { color: var(--mute); font-family: "IBM Plex Mono", monospace; font-size: 32px; }

.hero-cta {
  margin-top: 44px;
  display: flex; gap: 28px; align-items: center; flex-wrap: wrap;
}
.btn-big {
  padding: 16px 36px;
  background: var(--accent);
  color: var(--ink);
  font-family: "IBM Plex Mono", monospace;
  font-size: 12px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  font-weight: 500;
  border-radius: 4px;
  transition: background .25s, transform .2s, box-shadow .25s;
}
.btn-big:hover { background: var(--accent-2); color: var(--bg); transform: translateY(-2px); box-shadow: 0 10px 28px rgba(106,242,216,0.35); }
.btn-text {
  font-family: "IBM Plex Mono", monospace;
  font-size: 12px;
  letter-spacing: 0.22em;
  color: var(--silver);
  border-bottom: 1px solid var(--accent-2);
  padding-bottom: 4px;
  text-transform: uppercase;
}

/* KPI */
.hero-kpi {
  margin-top: 60px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
  padding-top: 32px;
  border-top: 1px solid var(--rule);
}
.kpi-cell { display: flex; flex-direction: column; gap: 6px; }
.kpi-num {
  font-family: "IBM Plex Sans", sans-serif;
  font-weight: 300;
  font-size: clamp(36px, 5vw, 56px);
  line-height: 1.0;
  background: linear-gradient(135deg, var(--ink), var(--accent-2));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.kpi-lab {
  font-family: "IBM Plex Mono", monospace;
  font-size: 10px;
  letter-spacing: 0.28em;
  color: var(--mute);
  text-transform: uppercase;
}
@media (max-width: 700px) { .hero-kpi { grid-template-columns: repeat(2, 1fr); } }

/* ABOUT */
.about { padding: 120px 0 80px; background: var(--bg-soft); }
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: 80px;
}
.about-l h2 {
  font-family: "IBM Plex Sans", sans-serif;
  font-weight: 300;
  font-size: clamp(40px, 6vw, 76px);
  line-height: 0.98;
  letter-spacing: -0.02em;
}
.about-l h2 em { font-weight: 700; }
.about-r p {
  font-size: 15px;
  line-height: 2.0;
  color: var(--ink-soft);
  margin-bottom: 20px;
}
.about-r .sig {
  margin-top: 28px;
  font-family: "IBM Plex Mono", monospace;
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--accent-2);
  text-transform: uppercase;
}
@media (max-width: 820px) { .about-grid { grid-template-columns: 1fr; gap: 32px; } }

/* SEC-HEAD */
.sec-head { margin-bottom: 56px; padding-bottom: 24px; border-bottom: 1px solid var(--rule); display: flex; justify-content: space-between; align-items: end; flex-wrap: wrap; gap: 16px; }
.sec-head h2 {
  font-family: "IBM Plex Sans", sans-serif;
  font-weight: 300;
  font-size: clamp(40px, 5.6vw, 72px);
  line-height: 0.95;
  letter-spacing: -0.02em;
}
.sec-head h2 em { font-weight: 700; }
.sec-head .eb { margin-bottom: 0; }

/* SPEAKERS */
.speakers { padding: 120px 0 80px; }
.sp-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}
.sp-card {
  padding: 28px 22px;
  background: var(--bg-soft);
  border: 1px solid var(--rule);
  border-radius: 6px;
  transition: border-color .25s, transform .25s;
  position: relative;
}
.sp-card:hover { border-color: var(--accent-2); transform: translateY(-3px); }
.sp-keynote {
  background: linear-gradient(180deg, rgba(106,242,216,0.12), var(--bg-soft));
  border-color: var(--accent-2);
  grid-column: span 2;
}
.sp-tag {
  font-family: "IBM Plex Mono", monospace;
  font-size: 10px;
  letter-spacing: 0.32em;
  color: var(--accent-2);
  text-transform: uppercase;
  font-weight: 500;
}
.sp-card h3 {
  margin-top: 14px;
  font-family: "IBM Plex Sans", sans-serif;
  font-weight: 600;
  font-size: 20px;
  letter-spacing: -0.01em;
  line-height: 1.3;
}
.sp-keynote h3 { font-size: 26px; }
.sp-title {
  margin-top: 6px;
  font-family: "IBM Plex Mono", monospace;
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--accent);
}
.sp-topic {
  margin-top: 16px;
  font-size: 13px;
  line-height: 1.85;
  color: var(--ink-soft);
}
.sp-more { background: transparent; border-style: dashed; }
.sp-more h3 { color: var(--accent-2); }
@media (max-width: 820px) {
  .sp-grid { grid-template-columns: 1fr 1fr; }
  .sp-keynote { grid-column: span 2; }
}

/* AGENDA */
.agenda { padding: 120px 0 80px; background: var(--bg-soft); }
.ag-day { margin-bottom: 48px; }
.ag-day:last-child { margin-bottom: 0; }
.day-head {
  display: flex; justify-content: space-between; align-items: baseline;
  padding-bottom: 16px;
  border-bottom: 2px solid var(--accent);
  margin-bottom: 18px;
}
.day-num {
  font-family: "IBM Plex Sans", sans-serif;
  font-weight: 700;
  font-size: 28px;
  letter-spacing: -0.01em;
  color: var(--accent-2);
}
.day-date {
  font-family: "IBM Plex Mono", monospace;
  font-size: 14px;
  letter-spacing: 0.16em;
  color: var(--ink-soft);
}
.ag-table { width: 100%; border-collapse: collapse; }
.ag-table td {
  padding: 16px 14px;
  border-bottom: 1px solid var(--rule);
  font-size: 14px;
  vertical-align: top;
}
.ag-table .t {
  width: 100px;
  font-family: "IBM Plex Mono", monospace;
  font-size: 14px;
  color: var(--accent-2);
  font-weight: 500;
}
.ag-table .ti { color: var(--ink); }
.ag-table .ti b { color: var(--accent-2); }
.ag-table .rm {
  width: 160px;
  text-align: right;
  font-family: "IBM Plex Mono", monospace;
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--mute);
  text-transform: uppercase;
}
@media (max-width: 700px) {
  .ag-table td { display: block; padding: 6px 0; }
  .ag-table tr { display: block; padding: 12px 0; border-bottom: 1px solid var(--rule); }
  .ag-table .rm { text-align: left; }
}

/* TICKET */
.ticket { padding: 120px 0 80px; }
.tk-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.tk-card {
  padding: 36px 28px;
  background: var(--bg-soft);
  border: 1px solid var(--rule);
  border-radius: 8px;
  position: relative;
  transition: border-color .25s, transform .3s;
}
.tk-card:hover { transform: translateY(-6px); }
.tk-feature {
  border-color: var(--accent-2);
  background: linear-gradient(180deg, rgba(106,242,216,0.12), var(--bg-soft));
}
.tk-badge {
  position: absolute; top: -12px; right: 24px;
  padding: 6px 14px;
  background: var(--accent-2);
  color: var(--bg);
  font-family: "IBM Plex Mono", monospace;
  font-size: 10px;
  letter-spacing: 0.22em;
  font-weight: 600;
  border-radius: 4px;
  text-transform: uppercase;
}
.tk-tag {
  font-family: "IBM Plex Mono", monospace;
  font-size: 10px;
  letter-spacing: 0.28em;
  color: var(--accent);
  text-transform: uppercase;
}
.tk-card h3 {
  margin-top: 12px;
  font-family: "IBM Plex Sans", sans-serif;
  font-weight: 600;
  font-size: 22px;
  line-height: 1.2;
  letter-spacing: -0.01em;
}
.tk-amt {
  margin: 18px 0 22px;
  font-family: "IBM Plex Sans", sans-serif;
  font-weight: 300;
  font-size: 42px;
  color: var(--ink);
  letter-spacing: -0.02em;
}
.tk-amt small {
  font-size: 12px;
  color: var(--mute);
  letter-spacing: 0.18em;
  margin-left: 8px;
  font-weight: 400;
}
.tk-card ul { list-style: none; }
.tk-card ul li {
  font-size: 13px;
  padding: 10px 0;
  border-bottom: 1px solid var(--rule);
  color: var(--ink-soft);
  position: relative;
  padding-left: 16px;
}
.tk-card ul li:before {
  content: '▸';
  position: absolute; left: 0;
  color: var(--accent-2);
}
.tk-card ul li:last-child { border: none; }
.tk-note { margin-top: 28px; font-size: 12px; color: var(--ink-soft); text-align: center; letter-spacing: 0.06em; }
@media (max-width: 820px) { .tk-grid { grid-template-columns: 1fr; } }

/* SPONSORS */
.sponsors { padding: 120px 0 80px; background: var(--bg-soft); }
.sp-tier { margin-bottom: 36px; }
.tier-name {
  display: block;
  font-family: "IBM Plex Mono", monospace;
  font-size: 11px;
  letter-spacing: 0.32em;
  color: var(--accent-2);
  text-transform: uppercase;
  margin-bottom: 18px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--rule);
}
.tier-logos { display: flex; gap: 36px; flex-wrap: wrap; align-items: center; }
.lg {
  font-family: "IBM Plex Sans", sans-serif;
  font-weight: 600;
  font-size: 20px;
  letter-spacing: 0.04em;
  color: var(--silver);
  padding: 14px 24px;
  background: var(--bg);
  border: 1px solid var(--rule);
  border-radius: 6px;
}
.lg-lg { font-size: 28px; padding: 20px 32px; }
.lg-sm { font-size: 14px; padding: 10px 18px; }
@media (max-width: 700px) { .tier-logos { gap: 12px; } .lg-lg { font-size: 18px; padding: 14px 20px; } }

/* ACCESS */
.access { padding: 120px 0 96px; }
.access-grid {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 64px;
  align-items: start;
}
.access h2 {
  font-family: "IBM Plex Sans", sans-serif;
  font-weight: 300;
  font-size: clamp(32px, 4vw, 44px);
  letter-spacing: -0.01em;
  margin-bottom: 28px;
}
.access dl dt {
  font-family: "IBM Plex Mono", monospace;
  font-size: 11px;
  letter-spacing: 0.24em;
  color: var(--accent-2);
  text-transform: uppercase;
  margin-top: 16px;
}
.access dl dd { font-size: 14px; color: var(--ink); line-height: 1.85; padding-top: 4px; }
.ac-map {
  aspect-ratio: 4/5;
  background:
    radial-gradient(50% 50% at 50% 50%, rgba(78,138,255,0.30), transparent 70%),
    var(--bg-soft);
  border: 1px solid var(--accent);
  border-radius: 8px;
  position: relative;
  display: flex; flex-direction: column; justify-content: center; align-items: center;
  gap: 10px;
}
.ac-map::before {
  content: ''; position: absolute; inset: 20px;
  border: 1px dashed rgba(78,138,255,0.32);
  border-radius: 4px;
}
.mp-eb { font-family: "IBM Plex Mono", monospace; font-size: 11px; letter-spacing: 0.32em; color: var(--accent-2); text-transform: uppercase; font-weight: 500; }
.mp-jp { font-family: "IBM Plex Sans", sans-serif; font-size: 22px; font-weight: 500; }
.mp-en { font-family: "IBM Plex Mono", monospace; font-size: 12px; letter-spacing: 0.16em; color: var(--ink-soft); }
.mp-dot {
  position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%);
  width: 14px; height: 14px;
  background: var(--accent);
  border-radius: 50%;
  box-shadow: 0 0 0 8px rgba(78,138,255,0.22);
  animation: mapPulse 2.4s ease-in-out infinite;
}
@keyframes mapPulse {
  0%, 100% { box-shadow: 0 0 0 8px rgba(78,138,255,0.22); }
  50% { box-shadow: 0 0 0 22px rgba(78,138,255,0); }
}
@media (max-width: 820px) {
  .access-grid { grid-template-columns: 1fr; gap: 32px; }
  .ac-map { aspect-ratio: 4/3; }
}

/* FOOTER */
.ft {
  padding: 28px 0;
  border-top: 1px solid var(--rule);
  background: var(--bg);
}
.ft-in {
  display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 12px;
  font-family: "IBM Plex Mono", monospace;
  font-size: 10px;
  letter-spacing: 0.2em;
  color: var(--mute);
  text-transform: uppercase;
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
}