/* ═══════════════════════════════════════════════════════════════════
   UsaUsa AI — main stylesheet
   ═══════════════════════════════════════════════════════════════════ */

.app {
  position: relative;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ── Background scene */
.scene-layer {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
}
.vignette {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 1;
  background:
    radial-gradient(120% 80% at 50% 50%, transparent 40%, rgba(0,0,0,0.6) 100%),
    linear-gradient(180deg, rgba(7,8,10,0.6) 0%, rgba(7,8,10,0) 18%, rgba(7,8,10,0) 80%, rgba(7,8,10,0.7) 100%);
}

/* ── Safety viewfinder grid */
.safety {
  position: fixed;
  inset: 32px;
  pointer-events: none;
  z-index: 2;
  border: 1px solid rgba(255,255,255,0.04);
}
.safety-x, .safety-y {
  position: absolute;
  background: rgba(255,255,255,0.04);
}
.safety-x { left: 0; right: 0; top: 50%; height: 1px; }
.safety-y { top: 0; bottom: 0; left: 50%; width: 1px; }
.safety-c {
  position: absolute;
  font-family: var(--mono);
  color: rgba(255,255,255,0.18);
  font-size: 14px;
}
.safety-c.tl { top: -8px; left: -2px; }
.safety-c.tr { top: -8px; right: -2px; }
.safety-c.bl { bottom: -2px; left: -2px; }
.safety-c.br { bottom: -2px; right: -2px; }

/* ── Boot stripe */
.boot {
  position: fixed;
  inset: 0;
  z-index: 300;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg);
  pointer-events: none;
  transition: opacity 0.6s ease 0.1s, visibility 0s linear 0.7s;
}
.boot.done { opacity: 0; visibility: hidden; }
.boot-bar {
  position: absolute;
  left: 0; right: 0;
  top: 50%;
  height: 1px;
  background: var(--accent);
  transform-origin: left center;
  animation: boot-wipe 1.2s cubic-bezier(.7,0,.3,1) forwards;
  box-shadow: 0 0 12px var(--accent);
}
@keyframes boot-wipe {
  0%   { transform: scaleX(0); }
  60%  { transform: scaleX(1); transform-origin: left center; }
  61%  { transform: scaleX(1); transform-origin: right center; }
  100% { transform: scaleX(0); transform-origin: right center; }
}
.boot-text {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--ink-dim);
  margin-top: 60px;
  animation: boot-text 1.2s steps(60) forwards;
}
@keyframes boot-text {
  from { clip-path: inset(0 100% 0 0); }
  to   { clip-path: inset(0 0 0 0); }
}

/* ═══ Top bar ═══ */
.topbar {
  position: relative;
  z-index: 10;
  padding: 22px 40px 0;
}
.topbar-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.topbar-meta {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-top: 14px;
  padding: 8px 0;
  border-top: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
  font-family: var(--mono);
  font-size: 11px;
  color: var(--ink-dim);
  letter-spacing: 0.06em;
}
.topbar-meta .dot {
  width: 4px; height: 4px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 6px var(--accent);
}

/* ── Logo */
.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--ink);
}
.logo-mark { display: flex; align-items: center; }
.logo-text { line-height: 1.1; }
.logo-en {
  font-family: var(--mono);
  font-weight: 700;
  letter-spacing: 0.18em;
  font-size: 13px;
}
.logo-ja {
  font-family: var(--serif);
  font-size: 11px;
  color: var(--ink-dim);
  margin-top: 2px;
}

/* ── Tabs */
.tabs {
  display: flex;
  gap: 0;
  flex: 1;
  justify-content: center;
}
.tab {
  background: none;
  border: none;
  color: var(--ink-dim);
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  padding: 10px 16px;
  cursor: pointer;
  display: flex;
  align-items: baseline;
  gap: 6px;
  position: relative;
  transition: color 0.2s;
}
.tab:hover { color: var(--ink); }
.tab.on { color: var(--ink); }
.tab.on::after {
  content: '';
  position: absolute;
  left: 16px;
  right: 16px;
  bottom: 4px;
  height: 1px;
  background: var(--accent);
  box-shadow: 0 0 6px var(--accent);
}
.tab-idx {
  font-size: 9px;
  color: var(--ink-faint);
}
.tab.on .tab-idx { color: var(--accent); }

/* ── Lang */
.lang {
  display: flex;
  align-items: center;
  gap: 4px;
  font-family: var(--mono);
  font-size: 11px;
}
.lang-btn {
  background: none;
  border: 1px solid var(--rule);
  color: var(--ink-dim);
  padding: 4px 10px;
  cursor: pointer;
  letter-spacing: 0.12em;
  transition: all 0.15s;
}
.lang-btn:hover { color: var(--ink); border-color: var(--ink-dim); }
.lang-btn.on {
  color: var(--bg);
  background: var(--accent);
  border-color: var(--accent);
}
.lang-sep { color: var(--ink-faint); }
.theme-btn {
  background: none;
  border: 1px solid var(--rule);
  color: var(--ink);
  width: 28px;
  height: 26px;
  margin-left: 6px;
  cursor: pointer;
  font-size: 14px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: all 0.15s;
}
.theme-btn:hover { border-color: var(--accent); color: var(--accent); }

/* ═══ Hero responsive ratio ═══ */
.hero {
  padding-left: clamp(24px, 4vw, 80px);
  max-width: clamp(520px, 48vw, 920px);
}
.slogan { font-size: clamp(34px, 5.2vw, 76px); }
.intro  { font-size: clamp(13px, 1.05vw, 16px); max-width: clamp(420px, 42vw, 760px); }

/* ═══ Content area ═══ */
.content {
  position: relative;
  z-index: 5;
  flex: 1;
  padding: 60px 24px 40px;
}

/* ═══ Hero (HOME) ═══ */
.hero {
  position: relative;
  max-width: 820px;
  padding-top: 40px;
  padding-left: 56px;
}
.hero-text { position: relative; }
.chip {
  display: inline-block;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.32em;
  color: var(--accent);
  padding: 5px 12px;
  border: 1px solid var(--accent);
  margin-bottom: 36px;
}
.slogan {
  margin: 0;
  font-family: var(--serif);
  font-weight: 500;
  font-size: clamp(40px, 6vw, 84px);
  line-height: 1.1;
  letter-spacing: -0.01em;
  text-wrap: pretty;
}
.slogan-main { display: inline; }
.slogan-quote {
  display: inline;
  color: var(--accent);
  font-style: italic;
}
.slogan-sub {
  margin-top: 18px;
  font-family: var(--mono);
  font-size: 13px;
  color: var(--ink-dim);
  letter-spacing: 0.06em;
}
.intro {
  margin-top: 40px;
  font-family: var(--sans);
  font-size: 15px;
  line-height: 1.7;
  color: var(--ink);
  max-width: 720px;
  text-wrap: pretty;
}
.cta-row {
  margin-top: 44px;
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}
.cta {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  background: transparent;
  border: 1px solid var(--rule);
  color: var(--ink);
  padding: 14px 22px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  cursor: pointer;
  transition: all 0.18s;
  white-space: nowrap;
}
.cta:hover {
  border-color: var(--ink);
  background: rgba(255,255,255,0.02);
}
.cta.primary {
  background: var(--accent);
  color: var(--bg);
  border-color: var(--accent);
}
.cta.primary:hover {
  background: transparent;
  color: var(--accent);
}
.cta-arrow {
  font-size: 14px;
  transition: transform 0.18s;
}
.cta:hover .cta-arrow { transform: translateX(2px); }

.hero-corners {
  position: absolute;
  inset: 0;
  pointer-events: none;
}
.hero-corners span {
  position: absolute;
  font-family: var(--mono);
  font-size: 14px;
  color: var(--ink-faint);
}
.hero-corners span:nth-child(1) { top: 0;    left: -10px; }
.hero-corners span:nth-child(2) { top: 0;    right: -10px; }
.hero-corners span:nth-child(3) { bottom: 0; left: -10px; }
.hero-corners span:nth-child(4) { bottom: 0; right: -10px; }

/* ═══ Generic pane ═══ */
.pane {
  width: 100%;
  max-width: min(75vw, 1600px);
  margin: 0 auto;
  background: rgba(7, 8, 10, 0.78);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  border: 1px solid var(--rule);
  padding: 40px 44px;
  animation: pane-in 0.5s cubic-bezier(.5,.0,.2,1);
}
@keyframes pane-in {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}
.pane-head {
  border-bottom: 1px solid var(--rule);
  padding-bottom: 20px;
  margin-bottom: 32px;
}
.kicker {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--accent);
  letter-spacing: 0.32em;
  margin-bottom: 12px;
}
.pane-title {
  margin: 0;
  font-family: var(--serif);
  font-size: clamp(28px, 4vw, 44px);
  font-weight: 500;
  letter-spacing: -0.005em;
  line-height: 1.15;
}
.pane-title-en {
  margin-top: 6px;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--ink-dim);
  letter-spacing: 0.12em;
}
.lead {
  font-family: var(--sans);
  font-size: 15px;
  line-height: 1.7;
  color: var(--ink);
  max-width: 720px;
  margin: 0 0 32px;
  text-wrap: pretty;
}

/* ═══ Vision pillars ═══ */
.pillars {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--rule);
  border: 1px solid var(--rule);
  margin-top: 16px;
}
.pillar {
  background: var(--bg);
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  min-height: 200px;
  position: relative;
}
.pillar-n {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--accent);
  letter-spacing: 0.2em;
}
.pillar-t {
  font-family: var(--serif);
  font-size: 18px;
  font-weight: 500;
  line-height: 1.4;
}
.pillar-d {
  font-family: var(--sans);
  font-size: 13px;
  color: var(--ink-dim);
  line-height: 1.6;
  margin-top: auto;
}

/* ═══ Tech ═══ */
.tech-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--rule);
  border: 1px solid var(--rule);
}
.tech-card {
  background: var(--bg);
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  min-height: 360px;
}
.tech-tag {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.3em;
  color: var(--accent);
  border: 1px solid var(--accent);
  padding: 3px 8px;
  align-self: flex-start;
}
.tech-title {
  font-family: var(--serif);
  font-size: 19px;
  font-weight: 500;
  line-height: 1.3;
}
.tech-desc {
  margin: 0;
  font-size: 13px;
  line-height: 1.6;
  color: var(--ink-dim);
}
.tech-spec {
  display: flex;
  flex-direction: column;
  gap: 4px;
  font-family: var(--mono);
  font-size: 11px;
  color: var(--ink);
  letter-spacing: 0.05em;
}
.tech-spec-row { display: flex; gap: 6px; align-items: baseline; }
.tech-spec-row span { color: var(--accent); }
.spec-svg {
  margin-top: auto;
  width: 100%;
  height: 80px;
  color: var(--ink-faint);
  stroke-width: 1;
}

/* ═══ Tech — additions ═══ */
.tech-card-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 4px;
}
.tech-card-num {
  font-family: var(--mono);
  font-size: 28px;
  color: var(--ink-faint);
  line-height: 1;
  font-weight: 300;
}
.tech-card .spec-svg {
  margin-top: 4px;
  margin-bottom: 8px;
  height: 90px;
  border-bottom: 1px dashed var(--rule);
  padding-bottom: 12px;
  color: var(--accent);
}

.stack-diagram {
  margin: 8px 0 36px;
  border: 1px solid var(--rule);
  background:
    repeating-linear-gradient(0deg, transparent 0 23px, var(--rule) 23px 24px);
}
.stack-rail-row {
  display: grid;
  grid-template-columns: 50px 200px 1fr;
  align-items: center;
  height: 48px;
  padding: 0 18px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--ink);
  border-bottom: 1px solid var(--rule);
}
.stack-rail-row:last-child { border-bottom: none; }
.stack-rail-row span {
  color: var(--accent);
  font-weight: 700;
}
.stack-rail-row b {
  font-weight: 500;
  color: var(--ink);
}
.stack-rail-row i {
  font-style: normal;
  color: var(--ink-dim);
  font-size: 10px;
  letter-spacing: 0.08em;
}

/* ═══ Business — additions ═══ */
.biz-index {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--rule);
  border: 1px solid var(--rule);
  margin: 8px 0 28px;
}
.biz-index-cell {
  background: var(--bg);
  padding: 18px 20px;
}
.biz-index-n {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.3em;
  color: var(--accent);
}
.biz-index-t {
  font-family: var(--serif);
  font-size: 17px;
  font-weight: 500;
  margin-top: 6px;
}
.biz-index-s {
  font-family: var(--mono);
  font-size: 10px;
  color: var(--ink-dim);
  letter-spacing: 0.08em;
  margin-top: 4px;
}

.biz-row-override-removed {
  /* moved into main biz-row rule */
}
.biz-num {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 12px;
  padding-top: 4px;
}
.biz-num-big {
  font-family: var(--mono);
  font-size: 36px;
  line-height: 1;
  font-weight: 300;
  color: var(--accent);
}
.biz-num-line {
  width: 1px;
  flex: 1;
  background: var(--rule);
  min-height: 80px;
}
.biz-fig {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.biz-fig .biz-svg {
  border: 1px solid var(--rule);
  background:
    repeating-linear-gradient(45deg, rgba(255,255,255,0.02) 0 1px, transparent 1px 8px),
    var(--bg-2);
  padding: 12px;
  width: 100%;
  height: 200px;
  color: var(--accent);
  display: block;
}
.biz-fig-cap {
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: 0.2em;
  color: var(--ink-dim);
}
.biz-body .biz-n {
  margin-bottom: 6px;
}

/* ═══ LIGHT THEME ═══ */
.app.theme-light {
  --bg:        #f6f4ee;
  --bg-2:      #ebe8de;
  --ink:       #15161a;
  --ink-dim:   #6c6e72;
  --ink-faint: #b8b6ad;
  --rule:      #d8d3c4;
  /* keep accent — passed via inline var */
}
.app.theme-light .pane {
  background: rgba(246, 244, 238, 0.86);
}
.app.theme-light .biz-fig .biz-svg,
.app.theme-light .team-photo {
  background:
    repeating-linear-gradient(45deg, rgba(0,0,0,0.04) 0 1px, transparent 1px 8px),
    var(--bg-2);
}
.app.theme-light .lang-btn.on {
  color: #fff;
  background: var(--ink);
  border-color: var(--ink);
}
.app.theme-light .topbar-meta .dot,
.app.theme-light .boot-bar { box-shadow: none; }
.app.theme-light .tab.on::after { box-shadow: none; }
.app.theme-light .stack-diagram {
  background:
    repeating-linear-gradient(0deg, transparent 0 23px, var(--rule) 23px 24px);
}
.app.theme-light {
  background: var(--bg);
  color: var(--ink);
}
.app.theme-light .vignette {
  background:
    radial-gradient(120% 80% at 50% 50%, transparent 40%, rgba(246,244,238,0.7) 100%),
    linear-gradient(180deg, rgba(246,244,238,0.7) 0%, rgba(246,244,238,0) 18%, rgba(246,244,238,0) 80%, rgba(246,244,238,0.85) 100%);
}
/* light: scene is drawn theme-aware in JS, no filter needed */
.app.theme-light .scene-layer pre {
  color: rgba(21,22,26,0.55) !important;
  mix-blend-mode: multiply !important;
}

/* ═══ Business ═══ */
.biz-list {
  display: flex;
  flex-direction: column;
}
.biz-row {
  display: grid;
  grid-template-columns: 60px 1fr;
  grid-template-areas:
    "num   fig"
    "num   body";
  column-gap: 36px;
  row-gap: 22px;
  padding: 32px 0;
  border-top: 1px solid var(--rule);
}
.biz-row:last-child { border-bottom: 1px solid var(--rule); }
.biz-num  { grid-area: num; }
.biz-fig  { grid-area: fig; }
.biz-body { grid-area: body; }
.biz-n {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.3em;
  color: var(--accent);
}
.biz-svg {
  width: 100%;
  height: 140px;
  color: var(--ink-faint);
  stroke-width: 1;
}
.biz-t {
  margin: 0;
  font-family: var(--serif);
  font-size: 26px;
  font-weight: 500;
  line-height: 1.2;
}
.biz-sub {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--ink-dim);
  letter-spacing: 0.1em;
  margin-top: 6px;
}
.biz-d {
  margin: 14px 0 18px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--ink);
  max-width: 560px;
}
.biz-bullets {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px 24px;
}
.biz-bullets li {
  font-size: 13px;
  color: var(--ink-dim);
  line-height: 1.5;
  display: flex;
  gap: 8px;
}
.bullet-mark { color: var(--accent); flex-shrink: 0; }
.biz-body { min-width: 0; width: 100%; }

/* ═══ Team ═══ */
.team {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 40px;
  align-items: start;
}
.team-photo {
  aspect-ratio: 1;
  background:
    repeating-linear-gradient(45deg, rgba(255,255,255,0.04) 0 1px, transparent 1px 8px),
    var(--bg-2);
  border: 1px solid var(--rule);
  display: flex;
  align-items: center;
  justify-content: center;
}
.team-photo-inner {
  font-family: var(--mono);
  font-size: 10px;
  color: var(--ink-dim);
  letter-spacing: 0.2em;
}
.team-name {
  font-family: var(--serif);
  font-size: 28px;
  font-weight: 500;
}
.team-name-en {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--ink-dim);
  letter-spacing: 0.12em;
  margin-top: 4px;
}
.team-role {
  margin-top: 10px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--accent);
}
.team-bio {
  margin: 18px 0 22px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--ink);
  max-width: 600px;
}
.team-cv {
  list-style: none;
  padding: 0;
  margin: 0 0 22px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.team-cv li {
  display: flex;
  gap: 10px;
  font-size: 13px;
  color: var(--ink-dim);
  border-bottom: 1px dashed var(--rule);
  padding-bottom: 8px;
}
.team-note {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--ink-faint);
  letter-spacing: 0.1em;
}

/* ═══ Contact ═══ */
.contact-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--rule);
  border: 1px solid var(--rule);
  margin-top: 24px;
}
.contact-cell {
  background: var(--bg);
  padding: 24px;
  min-height: 120px;
}
.contact-k {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.3em;
  color: var(--ink-dim);
  margin-bottom: 12px;
}
.contact-v {
  font-family: var(--serif);
  font-size: 18px;
  color: var(--ink);
  word-break: break-all;
}
.contact-v.link {
  color: var(--accent);
  text-decoration: none;
  border-bottom: 1px solid var(--accent);
}
.dim { color: var(--ink-dim); font-size: 12px; font-family: var(--mono); }

/* ═══ Footer ═══ */
.foot {
  position: relative;
  z-index: 6;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 18px 40px;
  border-top: 1px solid var(--rule);
  font-family: var(--mono);
  font-size: 10px;
  color: var(--ink-dim);
  letter-spacing: 0.12em;
}
.foot-tag { color: var(--accent); }

/* ═══ Side rail ═══ */
.rail {
  position: fixed;
  top: 50%;
  right: 16px;
  transform: translateY(-50%);
  z-index: 8;
  display: flex;
  flex-direction: column;
  gap: 8px;
  font-family: var(--mono);
  font-size: 10px;
  color: var(--ink-dim);
  letter-spacing: 0.12em;
  border-left: 1px solid var(--rule);
  padding: 8px 0 8px 12px;
  min-width: 130px;
  max-width: 160px;
}
.rail-row {
  display: flex;
  justify-content: space-between;
  gap: 8px;
}
.rail-row b {
  color: var(--ink);
  font-weight: 500;
}
.status-ok { color: var(--accent) !important; }
.rail-quote {
  margin-top: 14px;
  padding-top: 14px;
  border-top: 1px dashed var(--rule);
  font-family: var(--serif);
  font-size: 11px;
  color: var(--ink);
  letter-spacing: 0;
  line-height: 1.5;
}

/* ═══ Responsive ═══ */
@media (max-width: 980px) {
  .topbar { padding: 18px 22px 0; }
  .topbar-row { flex-wrap: wrap; }
  .tabs { flex-basis: 100%; order: 3; justify-content: flex-start; overflow-x: auto; }
  .content { padding: 40px 22px 28px; }
  .pane { padding: 28px 24px; }
  .pillars, .tech-grid, .contact-grid { grid-template-columns: 1fr; }
  .biz-row { grid-template-columns: 1fr; grid-template-areas: "num" "fig" "body"; gap: 16px; }
  .team { grid-template-columns: 1fr; gap: 20px; }
  .rail { display: none; }
  .foot { padding: 14px 22px; flex-direction: column; gap: 6px; align-items: flex-start; }
}