/* ================================
   Timeline (slide 1.2)
   ================================ */
.timeline-wrap {
  position: relative;
  padding: 40px 40px 60px;
}
.timeline-line {
  position: absolute;
  left: 80px; right: 80px;
  top: 200px;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--line-strong) 8%, var(--line-strong) 92%, transparent);
}
.timeline-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 0;
  position: relative;
}
.tl-col {
  padding: 0 24px;
  position: relative;
}
.tl-col .year {
  font-size: 56px;
  font-weight: 700;
  letter-spacing: -0.03em;
  color: var(--ink);
  height: 90px;
  line-height: 1;
}
.tl-col[data-current="true"] .year {
  color: var(--cyan);
}
.tl-col .dot {
  width: 14px; height: 14px;
  border-radius: 50%;
  background: var(--ink-faint);
  margin: 30px 0;
  position: relative;
  z-index: 2;
}
.tl-col[data-current="true"] .dot {
  background: var(--cyan);
  box-shadow: 0 0 0 6px rgba(89, 224, 255, 0.18), 0 0 30px rgba(89, 224, 255, 0.6);
}
.tl-col .model {
  font-size: 30px;
  font-weight: 600;
  letter-spacing: -0.01em;
  margin-bottom: 12px;
}
.tl-col .venue {
  font-family: var(--mono);
  font-size: 24px;
  color: var(--ink-faint);
  letter-spacing: 0.12em;
  margin-bottom: 16px;
  text-transform: uppercase;
}
.tl-col .body-txt {
  font-size: 24px;
  color: var(--ink-dim);
  line-height: 1.55;
}
.tl-pick {
  margin-top: 70px;
  padding: 32px 40px;
  border: 1px solid var(--line-strong);
  background: linear-gradient(120deg, rgba(89,224,255,0.06), rgba(0,0,0,0));
  border-radius: 8px;
  display: flex;
  align-items: center;
  gap: 28px;
}
.tl-pick .star {
  font-size: 32px; color: var(--cyan);
}
.tl-pick .txt {
  font-size: 26px;
  color: var(--ink);
  font-weight: 400;
}
.tl-pick .txt b { font-weight: 700; color: var(--cyan); }

/* ================================
   4-card grid (slides 1.3, 1.4)
   ================================ */
.quad {
  display: grid;
  grid-template-columns: 1fr 1fr;
  grid-template-rows: 1fr 1fr;
  gap: 40px;
  height: 100%;
}
.qcard {
  border: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(255,255,255,0.025), rgba(255,255,255,0));
  padding: 28px 36px;
  border-radius: 14px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  position: relative;
  overflow: hidden;
}
.qcard .cite { margin-top: auto; padding-top: 8px; }
.qcard p { flex: 0 1 auto; }
.qcard::before {
  content: ""; position: absolute;
  inset: 0; border-radius: 14px;
  background: radial-gradient(800px 200px at 0% 0%, rgba(89,224,255,0.10), transparent 60%);
  pointer-events: none;
}
.qcard .badge {
  display: inline-flex; align-items: center; gap: 12px;
  font-family: var(--mono);
  font-size: 18px;
  letter-spacing: 0.18em;
  color: var(--cyan);
  text-transform: uppercase;
}
.qcard .badge .pill {
  font-family: var(--sans);
  font-size: 22px;
  color: var(--ink-dim);
  letter-spacing: 0.06em;
  border: 1px solid var(--line-strong);
  padding: 4px 10px;
  border-radius: 999px;
  text-transform: none;
}
.qcard .title-row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
}
.qcard h3 {
  font-size: 32px;
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1.15;
  flex: 1 1 auto;
}
.qcard .metric {
  font-family: var(--mono);
  font-size: 26px;
  color: var(--ink-dim);
  letter-spacing: 0.08em;
  white-space: nowrap;
}
.qcard .metric b { color: var(--cyan); font-weight: 600; }
.qcard p {
  font-size: 26px;
  color: var(--ink-dim);
  line-height: 1.6;
}
.qcard .cite {
  font-family: var(--mono);
  font-size: 22px;
  color: var(--ink-faint);
  letter-spacing: 0.06em;
  margin-top: 8px;
}

/* Industry-case card variant */
.qcard.industry .badge { color: var(--amber); }
.qcard.industry::before { background: radial-gradient(800px 200px at 0% 0%, rgba(255, 200, 120, 0.10), transparent 60%); }
.qcard.industry .metric b { color: var(--amber); }
.qcard .flag {
  font-family: var(--mono);
  font-size: 22px;
  letter-spacing: 0.18em;
  color: var(--ink-faint);
  text-transform: uppercase;
  align-self: end;
  margin-left: auto;
}
.qcard .badge { display: flex; align-items: center; gap: 14px; }
.qcard.industry .badge { justify-content: space-between; }

/* gap-callout below quad */
.gap-callout {
  margin-top: 16px;
  padding: 18px 28px;
  border-left: 3px solid var(--coral);
  background: linear-gradient(90deg, rgba(255,140,120,0.06), transparent 80%);
  font-size: 22px;
  font-weight: 400;
  color: var(--ink);
  line-height: 1.45;
}
.gap-callout b { color: var(--coral); font-weight: 700; }

/* ================================
   3-column tech compare (slides 2.1, 2.2, 2.3)
   ================================ */
.tech-3col {
  display: grid;
  grid-template-columns: 1.05fr 1.05fr 1.05fr 1.25fr;
  gap: 36px;
  height: 100%;
}
.tech-card {
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 32px 30px;
  background: linear-gradient(180deg, rgba(255,255,255,0.025), transparent);
  display: flex; flex-direction: column;
}
.tech-card .ic {
  width: 56px; height: 56px;
  border-radius: 12px;
  background: rgba(255,255,255,0.06);
  display: flex; align-items: center; justify-content: center;
  font-size: 28px;
  margin-bottom: 18px;
}
.tech-card h4 {
  font-size: 30px;
  font-weight: 600;
  margin-bottom: 6px;
  letter-spacing: -0.01em;
}
.tech-card .acc {
  font-family: var(--mono);
  font-size: 16px;
  color: var(--ink-faint);
  letter-spacing: 0.1em;
  margin-bottom: 22px;
}
.tech-card .col-h {
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: 0.18em;
  margin: 14px 0 8px;
}
.tech-card .col-h.pro { color: var(--lime); }
.tech-card .col-h.con { color: var(--coral); }
.tech-card ul { list-style: none; }
.tech-card li {
  font-size: 20px;
  color: var(--ink-dim);
  line-height: 1.55;
  padding-left: 16px;
  position: relative;
  margin-bottom: 8px;
}
.tech-card li::before {
  content: "";
  position: absolute; left: 0; top: 11px;
  width: 8px; height: 1px; background: var(--ink-faint);
}

/* Wearable big-block layout (slide 2.1) */
.split-twocol {
  display: grid;
  grid-template-columns: 0.95fr 1.05fr;
  gap: 64px;
  height: 100%;
}
.split-left .lead-num {
  font-size: 220px;
  font-weight: 200;
  letter-spacing: -0.05em;
  line-height: 0.9;
  color: var(--coral);
}
.split-left .lead-num .unit { font-size: 64px; color: var(--ink-dim); }
.split-left .lead-cap {
  margin-top: 18px;
  font-size: 26px;
  color: var(--ink);
}
.split-left .lead-cap b { color: var(--coral); }
.split-left .meta-row {
  margin-top: 50px;
  display: flex; flex-direction: column; gap: 20px;
}
.split-left .meta-row .row {
  display: flex; justify-content: space-between;
  border-top: 1px solid var(--line);
  padding-top: 16px;
  font-size: 20px;
}
.split-left .meta-row .row .k { color: var(--ink-dim); font-family: var(--mono); letter-spacing: 0.1em; font-size: 16px; text-transform: uppercase; }
.split-left .meta-row .row .v { color: var(--ink); font-weight: 500; text-align: right; }
.proscons {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  height: 100%;
}
.pccol h5 {
  font-family: var(--mono);
  font-size: 14px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  margin-bottom: 22px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line);
}
.pccol.pro h5 { color: var(--lime); border-color: rgba(170, 245, 180, 0.25); }
.pccol.con h5 { color: var(--coral); border-color: rgba(255, 160, 140, 0.25); }
.pccol ul { list-style: none; display: flex; flex-direction: column; gap: 18px; }
.pccol li {
  font-size: 26px;
  color: var(--ink-dim);
  line-height: 1.45;
  display: grid;
  grid-template-columns: 22px 1fr;
  gap: 14px;
}
.pccol.pro li::before { content: "+"; color: var(--lime); font-weight: 600; }
.pccol.con li::before { content: "−"; color: var(--coral); font-weight: 600; }

/* ================================
   Comparison matrix (slide 2.4)
   ================================ */
.matrix {
  width: 100%;
  border-collapse: collapse;
  font-size: 18px;
}
.matrix th, .matrix td {
  padding: 18px 18px;
  text-align: left;
  border-bottom: 1px solid var(--line);
  vertical-align: middle;
}
.matrix thead th {
  font-family: var(--mono);
  font-size: 14px;
  letter-spacing: 0.16em;
  color: var(--ink-faint);
  text-transform: uppercase;
  border-bottom: 1px solid var(--line-strong);
  padding-top: 8px; padding-bottom: 22px;
}
.matrix thead th.us {
  color: var(--cyan);
  border-bottom: 1px solid var(--cyan);
}
.matrix th.dim-h { color: var(--ink); font-size: 14px; }
.matrix tbody td { color: var(--ink-dim); font-size: 24px; line-height: 1.4; }
.matrix tbody td.us { color: var(--ink); background: rgba(89,224,255,0.05); position: relative; }
.matrix tbody td.us::before {
  content: ""; position: absolute; left: 0; top: 0; bottom: 0; width: 2px; background: var(--cyan);
}
.matrix tbody td.us:last-child::after {
  content: ""; position: absolute; right: 0; top: 0; bottom: 0; width: 2px; background: var(--cyan);
}
.matrix .dim-name {
  font-weight: 600; color: var(--ink); font-size: 26px;
}
.matrix .stars {
  font-family: var(--mono); letter-spacing: 0.08em; color: var(--amber);
  display: inline-block; min-width: 88px;
}
.matrix .lvl { color: var(--ink-dim); font-size: 18px; margin-left: 6px; }
.matrix .col-name-us { color: var(--cyan); }

/* ================================
   Three innovations (slide 3.1)
   ================================ */
.innov-row {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 40px;
  height: 100%;
}
.innov-card {
  position: relative;
  padding: 56px 44px 48px;
  border-radius: 16px;
  background: linear-gradient(180deg, rgba(255,255,255,0.04) 0%, rgba(255,255,255,0) 100%);
  border: 1px solid var(--line);
  display: flex;
  flex-direction: column;
}
.innov-card .num {
  font-size: 28px;
  font-family: var(--mono);
  color: var(--cyan);
  letter-spacing: 0.3em;
  margin-bottom: 32px;
}
.innov-card h3 {
  font-size: 48px;
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1.05;
  margin-bottom: 12px;
}
.innov-card .h-sub {
  font-size: 28px;
  color: var(--cyan);
  font-weight: 400;
  margin-bottom: 28px;
}
.innov-card p {
  font-size: 26px;
  color: var(--ink-dim);
  line-height: 1.6;
}
.innov-card p b { color: var(--ink); font-weight: 600; }
.innov-card .cite {
  margin-top: auto;
  padding-top: 28px;
  font-family: var(--mono);
  font-size: 24px;
  color: var(--ink-faint);
  letter-spacing: 0.06em;
  border-top: 1px solid var(--line);
}

/* ================================
   Positioning map (slide 3.2) — bubble chart
   ================================ */
.map-wrap {
  display: grid;
  grid-template-columns: 1.5fr 1fr;
  gap: 64px;
  height: 100%;
}
.bubble-chart {
  position: relative;
  padding: 36px 36px 60px 100px;
}
.bc-y-axis {
  position: absolute;
  top: 50%; left: 24px;
  transform: rotate(-90deg) translateX(50%);
  transform-origin: right center;
  font-size: 24px;
  color: var(--ink-dim);
  letter-spacing: 0.06em;
  white-space: nowrap;
}
.bc-y-hi { position: absolute; top: 32px; left: 70px; font-size: 24px; color: var(--ink-dim); }
.bc-y-lo { position: absolute; bottom: 64px; left: 70px; font-size: 24px; color: var(--ink-dim); }
.bc-x-axis {
  position: absolute;
  bottom: 12px; left: 50%;
  transform: translateX(-50%);
  font-size: 24px;
  color: var(--ink-dim);
  letter-spacing: 0.06em;
}
.bc-x-lo { position: absolute; bottom: 44px; left: 110px; font-size: 24px; color: var(--ink-dim); }
.bc-x-hi { position: absolute; bottom: 44px; right: 32px; font-size: 24px; color: var(--ink-dim); }

.bc-plot {
  position: relative;
  width: 100%;
  height: calc(100% - 32px);
  min-height: 540px;
}
.bc-quadrant {
  position: absolute;
  left: 0; top: 0;
  width: 50%; height: 50%;
  background: rgba(180, 200, 220, 0.06);
  border-radius: 2px;
}
.bc-axis-y {
  position: absolute;
  left: 0; top: -8px; bottom: 0;
  width: 1px;
  background: linear-gradient(to bottom, transparent, var(--ink-dim) 4%, var(--ink-dim) 96%, transparent);
}
.bc-axis-x {
  position: absolute;
  left: 0; right: -8px; bottom: 0;
  height: 1px;
  background: linear-gradient(to right, transparent, var(--ink-dim) 4%, var(--ink-dim) 96%, transparent);
}
.bc-axis-y::before, .bc-axis-x::after {
  content: ""; position: absolute;
  width: 14px; height: 14px;
  border-right: 1px solid var(--ink-dim);
  border-top: 1px solid var(--ink-dim);
}
.bc-axis-y::before { top: -1px; left: -7px; transform: rotate(-45deg); }
.bc-axis-x::after { right: 0; bottom: -7px; transform: rotate(45deg); }

.bc-bubble {
  position: absolute;
  transform: translate(-50%, -50%);
  display: flex;
  align-items: center;
  gap: 22px;
}
.bc-dot {
  width: var(--sz);
  height: var(--sz);
  border-radius: 50%;
  background: var(--c);
  box-shadow: 0 8px 32px rgba(0,0,0,0.4);
  flex-shrink: 0;
  display: grid;
  place-items: center;
  color: #0a0a0a;
  font-size: 38px;
}
.bc-bubble.us .bc-dot {
  box-shadow: 0 0 0 6px rgba(232, 168, 46, 0.18), 0 12px 40px rgba(232, 168, 46, 0.5);
}
.bc-star { color: #0a0a0a; font-size: 42px; line-height: 1; }
.bc-lab {
  font-size: 30px;
  font-weight: 600;
  line-height: 1.15;
  white-space: nowrap;
}

.map-side h3 {
  font-size: 48px;
  font-weight: 300;
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin-bottom: 24px;
}
.map-side h3 em { font-style: normal; font-weight: 700; color: var(--cyan); }
.map-side p {
  font-size: 28px;
  color: var(--ink-dim);
  line-height: 1.55;
  margin-bottom: 14px;
}
.map-side ul { list-style: none; margin-top: 28px; display: flex; flex-direction: column; gap: 18px; }
.map-side li {
  font-size: 26px;
  color: var(--ink-dim);
  padding-left: 28px;
  position: relative;
  line-height: 1.5;
}
.map-side li::before {
  content: ""; position: absolute; left: 0; top: 16px; width: 16px; height: 1px; background: var(--cyan);
}
.map-side li b { color: var(--ink); font-weight: 600; }

/* ================================
   Tech selection table (slide 4.1)
   ================================ */
.techsel {
  display: grid;
  grid-template-columns: 220px 280px 1fr 1fr;
  gap: 0;
  row-gap: 4px;
}
.techsel .row {
  display: contents;
}
.techsel .cell {
  padding: 24px 22px;
  border-top: 1px solid var(--line);
  font-size: 22px;
  color: var(--ink-dim);
  line-height: 1.45;
}
.techsel .row.head .cell {
  font-family: var(--mono);
  font-size: 14px;
  letter-spacing: 0.16em;
  color: var(--ink-faint);
  text-transform: uppercase;
  border-top: none;
  border-bottom: 1px solid var(--line-strong);
  padding-bottom: 16px;
}
.techsel .cell.k { color: var(--ink); font-size: 26px; font-weight: 600; }
.techsel .cell.tech {
  color: var(--cyan); font-weight: 600;
  font-family: var(--sans);
  font-size: 24px;
  letter-spacing: -0.01em;
}
.techsel .cell.alt {
  color: var(--ink-faint);
  font-family: var(--mono);
  font-size: 24px;
  letter-spacing: 0.04em;
}
.techsel .cell.alt b { color: var(--coral); font-weight: 600; }

/* ================================
   Outcome stats (slide 4.3)
   ================================ */
.outcome-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 40px;
  height: 100%;
}
.outcome {
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 56px 48px 48px;
  background: linear-gradient(180deg, rgba(255,255,255,0.03), transparent);
  display: flex; flex-direction: column;
  position: relative;
  overflow: hidden;
}
.outcome::after {
  content: ""; position: absolute; top: -120px; right: -120px;
  width: 280px; height: 280px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(89,224,255,0.12), transparent 70%);
}
.outcome .label {
  font-family: var(--mono);
  font-size: 16px;
  letter-spacing: 0.2em;
  color: var(--ink-faint);
  text-transform: uppercase;
  margin-bottom: 24px;
}
.outcome .big {
  font-size: 156px;
  font-weight: 200;
  letter-spacing: -0.05em;
  line-height: 0.95;
  color: var(--cyan);
}
.outcome .big .unit { font-size: 56px; color: var(--ink); margin-left: 6px; font-weight: 300; }
.outcome .target {
  font-size: 24px; font-weight: 500;
  color: var(--ink); margin-top: 18px;
}
.outcome .vs {
  margin-top: 24px;
  padding-top: 20px;
  border-top: 1px solid var(--line);
  font-size: 28px;
  color: var(--ink-dim);
  line-height: 1.6;
}
.outcome .vs b { color: var(--ink); font-weight: 500; }

/* ================================
   Conclusion (slide 19)
   ================================ */
.conclusion {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
  height: 100%;
}
.conclusion h2 {
  font-size: 96px;
  font-weight: 300;
  letter-spacing: -0.03em;
  line-height: 1;
}
.conclusion h2 em {
  display: block;
  font-style: normal;
  font-weight: 700;
  font-size: 110px;
  background: linear-gradient(120deg, var(--cyan), var(--violet));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.conclusion .lead {
  font-size: 28px;
  color: var(--ink-dim);
  margin-top: 36px;
  max-width: 700px;
  line-height: 1.55;
}
.con-list { display: flex; flex-direction: column; gap: 36px; }
.con-item {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 32px;
  padding: 28px 0;
  border-top: 1px solid var(--line-strong);
}
.con-item .n {
  font-family: var(--mono);
  font-size: 26px;
  color: var(--cyan);
  letter-spacing: 0.18em;
  padding-top: 4px;
}
.con-item p {
  font-size: 34px;
  color: var(--ink);
  line-height: 1.55;
  font-weight: 400;
}
.con-item p b {
  background: linear-gradient(120deg, var(--cyan), #fff);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  font-weight: 700;
}

/* ================================
   End slide
   ================================ */
.end-slide {
  display: flex; align-items: center; justify-content: center;
  text-align: center;
  padding: 0 120px;
}
.end-slide .big-thanks {
  font-size: 200px;
  font-weight: 200;
  letter-spacing: -0.04em;
  line-height: 1;
}
.end-slide .big-thanks em {
  font-style: normal;
  font-weight: 700;
  background: linear-gradient(120deg, var(--cyan), var(--violet));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.end-slide .sub {
  margin-top: 36px;
  font-family: var(--mono);
  font-size: 22px;
  letter-spacing: 0.3em;
  color: var(--ink-dim);
  text-transform: uppercase;
}