/* ==============================================================
   TECHNOLOGY PAGE  ·  t-* namespace
   ============================================================== */

.t-eyebrow {
  font-family: var(--font-mono);
  font-size: var(--text-mono-xs);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--accent);
}
.t-eyebrow--inv { color: var(--accent); }

.t-lede {
  font-size: var(--text-xl);
  line-height: 1.5;
  color: var(--ink);
  font-weight: 500;
  margin: 0 0 1.5rem 0;
  max-width: 56ch;
}
.t-lede--inv { color: var(--bone); }
.t-body-inv {
  font-size: var(--text-lg);
  line-height: 1.6;
  color: rgba(247, 245, 239, 0.78);
  margin: 0 0 1.25rem 0;
  max-width: 60ch;
}
.t-body-inv strong { color: var(--bone); font-weight: 600; }

/* ==============  HERO  ============== */
.t-hero {
  position: relative;
  min-height: clamp(560px, 82vh, 780px);
  background: var(--ink);
  color: var(--bone);
  overflow: hidden;
  isolation: isolate;
}
.t-hero-media { position: absolute; inset: 0; z-index: 0; }
.t-hero-media img {
  width: 100%; height: 100%;
  object-fit: cover;
  object-position: center 45%;
  opacity: 0.65;
}
.t-hero::before {
  content: "";
  position: absolute; inset: 0; z-index: 1;
  background:
    linear-gradient(180deg, rgba(11,11,12,0.55) 0%, rgba(11,11,12,0.3) 30%, rgba(11,11,12,0.9) 100%),
    linear-gradient(90deg, rgba(11,11,12,0.85) 0%, rgba(11,11,12,0.4) 50%, rgba(11,11,12,0) 75%);
  pointer-events: none;
}
.t-hero-inner {
  position: relative; z-index: 2;
  max-width: 1240px;
  margin: 0 auto;
  padding: clamp(120px, 16vh, 180px) var(--gutter) clamp(60px, 10vh, 100px);
  display: flex; flex-direction: column;
  gap: 1.5rem; align-items: flex-start;
}
.t-hero-crumbs {
  display: flex; gap: 0.5rem; align-items: center;
  font-family: var(--font-mono);
  font-size: var(--text-mono-xs);
  letter-spacing: 0.14em; text-transform: uppercase;
  color: rgba(247, 245, 239, 0.6);
}
.t-hero-crumbs a { color: inherit; text-decoration: none; }
.t-hero-crumbs a:hover { color: var(--accent); }
.t-hero-crumbs .sep { opacity: 0.5; }
.t-hero-eyebrow {
  font-family: var(--font-mono);
  font-size: var(--text-mono-xs);
  letter-spacing: 0.18em; text-transform: uppercase;
  color: var(--accent);
  margin-top: 0.5rem;
}
.t-hero-title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(2.75rem, 6.5vw, 5rem);
  line-height: 0.98;
  letter-spacing: -0.03em;
  color: var(--bone);
  margin: 0;
  text-transform: uppercase;
  max-width: 20ch;
}
.t-hero-tagline {
  font-size: var(--text-lg);
  line-height: 1.55;
  color: rgba(247, 245, 239, 0.82);
  max-width: 60ch;
  margin: 0.5rem 0 1rem 0;
}
.t-hero-jumps {
  display: flex; flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 1rem;
}
.t-hero-jumps a {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: rgba(247, 245, 239, 0.85);
  padding: 0.5rem 0.85rem;
  border: 1px solid rgba(247, 245, 239, 0.2);
  border-radius: 2px;
  text-decoration: none;
  background: rgba(247, 245, 239, 0.04);
  transition: background 180ms, border-color 180ms, color 180ms;
}
.t-hero-jumps a:hover {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--bone);
}

/* ==============  SECTIONS  ============== */
.t-section {
  padding: clamp(80px, 12vh, 140px) var(--gutter);
}
.t-section--light { background: var(--bone); color: var(--ink); }
.t-section--dark { background: var(--ink); color: var(--bone); }
.t-section-inner { max-width: 1240px; margin: 0 auto; }
.t-section-header { margin-bottom: clamp(3rem, 5vw, 5rem); }
.t-section-title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(2rem, 4.5vw, 3.5rem);
  line-height: 1;
  letter-spacing: -0.028em;
  color: var(--ink);
  margin: 1rem 0 0 0;
  text-transform: uppercase;
}
.t-section-title--inv { color: var(--bone); }

/* ==============  TWO-PIECE DIAGRAM  ============== */
.t-two-piece-diagram {
  display: flex;
  flex-direction: column;
  gap: 2rem;
  padding: clamp(2rem, 4vw, 3.5rem);
  background: rgba(11, 11, 12, 0.03);
  border: 1px solid rgba(11, 11, 12, 0.1);
  margin-bottom: clamp(3rem, 5vw, 4rem);
}
.t-tp-part {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.2fr);
  gap: clamp(2rem, 4vw, 3rem);
  align-items: center;
}
@media (max-width: 780px) { .t-tp-part { grid-template-columns: 1fr; } }
.t-tp-tag {
  font-family: var(--font-mono);
  font-size: var(--text-mono-xs);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.75rem;
}
.t-tp-heading {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.4rem, 2vw, 1.8rem);
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--ink);
  margin: 0 0 0.75rem 0;
  text-transform: uppercase;
}
.t-tp-label p {
  font-size: 1rem;
  line-height: 1.6;
  color: var(--text-secondary);
  margin: 0;
  max-width: 40ch;
}
.t-tp-visual { color: var(--ink); }
.t-tp-visual svg { width: 100%; height: auto; }
.t-tp-connector {
  display: flex; flex-direction: column;
  align-items: center; gap: 0.5rem;
  color: var(--text-secondary);
}
.t-tp-connector-label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-secondary);
}
.t-tp-connector svg { color: var(--accent); width: 60px; height: 30px; }

.t-two-piece-benefits {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  background: rgba(11, 11, 12, 0.12);
  border: 1px solid rgba(11, 11, 12, 0.12);
  margin-bottom: 2rem;
}
@media (max-width: 900px) { .t-two-piece-benefits { grid-template-columns: 1fr; } }
.t-benefit {
  background: var(--bone);
  padding: clamp(1.75rem, 3vw, 2.5rem);
  display: flex; flex-direction: column;
  gap: 0.5rem;
}
.t-benefit-num {
  font-family: var(--font-mono);
  font-size: var(--text-mono-xs);
  letter-spacing: 0.14em;
  color: var(--accent);
  margin-bottom: 0.5rem;
}
.t-benefit h4 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.35rem;
  line-height: 1.15;
  letter-spacing: -0.015em;
  color: var(--ink);
  margin: 0;
  text-transform: uppercase;
}
.t-benefit p {
  font-size: 0.95rem;
  line-height: 1.6;
  color: var(--text-secondary);
  margin: 0.25rem 0 0 0;
}

.t-legal-note {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-secondary);
  padding: 1rem 1.25rem;
  border-left: 3px solid var(--accent);
  background: rgba(255, 91, 46, 0.04);
  max-width: 68ch;
}

/* ==============  TESLA GRID  ============== */
.t-tesla-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
  gap: clamp(2rem, 5vw, 5rem);
  align-items: start;
}
@media (max-width: 900px) { .t-tesla-grid { grid-template-columns: 1fr; } }
.t-tesla-copy p {
  font-size: var(--text-lg);
  line-height: 1.6;
  color: rgba(247, 245, 239, 0.78);
  margin: 0 0 1.25rem 0;
  max-width: 58ch;
}
.t-tesla-copy p strong { color: var(--bone); font-weight: 600; }

.t-tesla-stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1.5rem;
  margin-top: 2rem;
  padding-top: 2rem;
  border-top: 1px solid rgba(247, 245, 239, 0.14);
}
.t-tesla-stats--inv {
  border-top-color: rgba(247, 245, 239, 0.14);
}
.t-stat { display: flex; flex-direction: column; gap: 0.4rem; }
.t-stat-num {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(2rem, 3.5vw, 2.75rem);
  line-height: 1;
  letter-spacing: -0.025em;
  color: var(--bone);
}
.t-section--light .t-stat-num { color: var(--ink); }
.t-stat-unit {
  font-size: 0.5em;
  color: var(--accent);
  margin-left: 3px;
  font-weight: 500;
}
.t-stat-label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: rgba(247, 245, 239, 0.55);
}
.t-section--light .t-stat-label { color: var(--text-secondary); }

.t-tesla-diagram {
  padding: 1.5rem;
  background: rgba(247, 245, 239, 0.03);
  border: 1px solid rgba(247, 245, 239, 0.12);
  color: var(--bone);
}
.t-tesla-diagram svg { width: 100%; height: auto; max-height: 500px; }
.t-tesla-caption {
  display: flex; flex-direction: column;
  gap: 0.5rem;
  margin-top: 1rem;
  padding-top: 1rem;
  border-top: 1px solid rgba(247, 245, 239, 0.1);
}
.t-legend {
  display: flex; align-items: center; gap: 0.6rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: rgba(247, 245, 239, 0.7);
}
.t-legend-swatch {
  width: 20px; height: 3px;
  display: inline-block;
}

/* ==============  SIX-TUBE  ============== */
.t-sixtube-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: clamp(2rem, 5vw, 5rem);
  align-items: start;
}
@media (max-width: 900px) { .t-sixtube-grid { grid-template-columns: 1fr; } }
.t-sixtube-diagram {
  padding: 1.5rem 2rem;
  background: rgba(11, 11, 12, 0.03);
  border: 1px solid rgba(11, 11, 12, 0.1);
}
.t-sixtube-diagram svg { width: 100%; height: auto; }
.t-sixtube-copy p {
  font-size: var(--text-lg);
  line-height: 1.6;
  color: var(--text-secondary);
  margin: 0 0 1.25rem 0;
  max-width: 58ch;
}
.t-sixtube-copy p strong { color: var(--ink); font-weight: 600; }
.t-list {
  padding: 0;
  list-style: none;
  counter-reset: tlist;
  margin: 1.5rem 0 1.5rem 0;
}
.t-list li {
  counter-increment: tlist;
  padding: 1rem 0 1rem 3rem;
  border-top: 1px solid rgba(11, 11, 12, 0.08);
  font-size: 1rem;
  line-height: 1.55;
  color: var(--text-secondary);
  position: relative;
}
.t-list li::before {
  content: counter(tlist, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 1rem;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  letter-spacing: 0.1em;
  color: var(--accent);
  font-weight: 500;
}
.t-list li:last-child { border-bottom: 1px solid rgba(11, 11, 12, 0.08); }
.t-list li strong { color: var(--ink); font-weight: 600; }

.t-badge {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  margin-top: 1.5rem;
  padding: 1rem 1.5rem;
  border: 1px solid var(--accent);
  background: rgba(255, 91, 46, 0.06);
}
.t-badge-num {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 2.5rem;
  line-height: 1;
  color: var(--accent);
}
.t-badge-title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.05rem;
  line-height: 1.2;
  color: var(--ink);
  letter-spacing: -0.015em;
  text-transform: uppercase;
}
.t-badge-sub {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-secondary);
  margin-top: 0.25rem;
}

/* ==============  TRIANGULAR  ============== */
.t-tri-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
  gap: clamp(2rem, 5vw, 5rem);
  align-items: start;
}
@media (max-width: 900px) { .t-tri-grid { grid-template-columns: 1fr; } }
.t-tri-diagram {
  padding: 1.5rem;
  background: rgba(247, 245, 239, 0.03);
  border: 1px solid rgba(247, 245, 239, 0.12);
  color: var(--bone);
}
.t-tri-diagram svg { width: 100%; height: auto; max-height: 500px; }
.t-tri-caption {
  border-top-color: rgba(247, 245, 239, 0.1) !important;
}

/* ==============  MATERIALS  ============== */
.t-mat-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: rgba(247, 245, 239, 0.12);
  border: 1px solid rgba(247, 245, 239, 0.12);
}
@media (max-width: 780px) { .t-mat-grid { grid-template-columns: 1fr; } }
.t-mat-card {
  background: var(--ink);
  padding: clamp(1.75rem, 3vw, 2.5rem);
  display: flex; flex-direction: column;
  gap: 0.5rem;
}
.t-mat-num {
  font-family: var(--font-mono);
  font-size: var(--text-mono-xs);
  letter-spacing: 0.14em;
  color: var(--accent);
  margin-bottom: 0.5rem;
}
.t-mat-card h4 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.4rem;
  line-height: 1.15;
  letter-spacing: -0.015em;
  color: var(--bone);
  margin: 0;
  text-transform: uppercase;
}
.t-mat-card p {
  font-size: 0.98rem;
  line-height: 1.6;
  color: rgba(247, 245, 239, 0.72);
  margin: 0.25rem 0 0 0;
}
.t-mat-card p strong { color: var(--bone); font-weight: 600; }

/* ==============  CTA  ============== */
.t-cta {
  background: var(--bone);
  color: var(--ink);
  padding: clamp(80px, 14vh, 160px) var(--gutter);
  text-align: center;
  border-top: 1px solid rgba(11, 11, 12, 0.08);
}
.t-cta-inner {
  max-width: 720px;
  margin: 0 auto;
  display: flex; flex-direction: column;
  gap: 1.5rem; align-items: center;
}
.t-cta-eyebrow {
  font-family: var(--font-mono);
  font-size: var(--text-mono-xs);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--accent);
}
.t-cta-title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(2.25rem, 5vw, 3.5rem);
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--ink);
  margin: 0;
  text-transform: uppercase;
}
.t-cta-tagline {
  font-size: var(--text-lg);
  line-height: 1.55;
  color: var(--text-secondary);
  max-width: 56ch;
  margin: 0.5rem 0 1.5rem;
}
.t-cta-actions {
  display: flex; gap: 1rem; flex-wrap: wrap; justify-content: center;
}

/* ==============  Design Principles band  ============== */
.t-principles-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1.75rem;
  margin-top: 3rem;
}
.t-principle {
  border: 1px solid rgba(247, 245, 239, 0.14);
  padding: 2rem 1.75rem;
  background: rgba(247, 245, 239, 0.02);
  display: flex;
  flex-direction: column;
}
.t-principle-eyebrow {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1rem;
}
.t-principle-lede {
  font-size: 1.05rem;
  line-height: 1.5;
  color: var(--bone);
  margin-bottom: 1.5rem;
}
.t-principle-rule {
  height: 1px;
  background: rgba(247, 245, 239, 0.14);
  margin-bottom: 1.25rem;
}
.t-principle-label {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.68rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: rgba(247, 245, 239, 0.55);
  margin-bottom: 0.85rem;
}
.t-principle-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}
.t-principle-list li {
  position: relative;
  padding-left: 1.1rem;
  font-size: 0.92rem;
  line-height: 1.55;
  color: rgba(247, 245, 239, 0.82);
}
.t-principle-list li::before {
  content: '—';
  position: absolute;
  left: 0;
  color: var(--accent);
}
@media (max-width: 960px) {
  .t-principles-grid { grid-template-columns: 1fr; gap: 1.25rem; }
  .t-principle { padding: 1.5rem 1.25rem; }
}

/* ==============  Reveal shim  ============== */
.reveal { opacity: 0; transform: translateY(20px); transition: opacity 800ms var(--ease-out), transform 800ms var(--ease-out); }
.reveal.is-visible { opacity: 1; transform: translateY(0); }

@media (max-width: 640px) {
  .t-hero-title { font-size: clamp(2.5rem, 11vw, 3.5rem); }
  .t-section-title { font-size: clamp(1.75rem, 9vw, 2.75rem); }
}

/* CTA link to full upgrade program page */
.t-two-piece-cta {
  margin-top: 2.5rem;
  display: flex;
  justify-content: center;
}
.t-two-piece-link {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  font-family: var(--font-mono);
  font-size: var(--text-mono-sm);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--bone);
  background: var(--ink);
  text-decoration: none;
  padding: 0.9rem 1.4rem;
  border: 1px solid var(--ink);
  border-radius: var(--radius);
  transition: background var(--dur-1) var(--ease-out), border-color var(--dur-1) var(--ease-out), color var(--dur-1) var(--ease-out);
}
.t-two-piece-link:hover {
  background: var(--accent);
  border-color: var(--accent);
}
.t-two-piece-link .arrow {
  transition: transform var(--dur-1) var(--ease-out);
}
.t-two-piece-link:hover .arrow { transform: translateX(4px); }

/* ============================================================
   DESIGN PRINCIPLES — Editorial blueprint (redesign, replaces .t-principles-grid usage on this page)
   ============================================================ */

.t-principles-blueprint {
  position: relative;
  overflow: hidden;
}

.t-principles-blueprint::before {
  content: "";
  position: absolute; inset: 0;
  background-image:
    linear-gradient(to right, rgba(255,255,255,0.035) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255,255,255,0.035) 1px, transparent 1px);
  background-size: 96px 96px;
  pointer-events: none;
  mask-image: radial-gradient(ellipse at center, black 40%, transparent 90%);
  -webkit-mask-image: radial-gradient(ellipse at center, black 40%, transparent 90%);
}

.tp-blueprint {
  position: relative;
  margin-top: clamp(48px, 8vw, 96px);
}

.tp-row {
  display: grid;
  grid-template-columns: 140px 1fr 220px;
  gap: clamp(28px, 5vw, 72px);
  align-items: start;
  padding: clamp(40px, 5vw, 64px) 0;
}

.tp-num {
  font-family: "JetBrains Mono", ui-monospace, monospace;
  font-size: clamp(72px, 8vw, 128px);
  font-weight: 300;
  line-height: 0.9;
  color: var(--accent);
  letter-spacing: -0.02em;
  opacity: 0.9;
  position: relative;
  padding-top: 6px;
}

.tp-num::after {
  content: "";
  display: block;
  width: 48px;
  height: 1px;
  background: var(--accent);
  opacity: 0.5;
  margin-top: 18px;
}

.tp-body {
  min-width: 0;
}

.tp-tag {
  font-family: "JetBrains Mono", ui-monospace, monospace;
  font-size: 11px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: rgba(255,255,255,0.5);
  margin-bottom: 20px;
}

.tp-lede {
  font-family: var(--font-display, "Space Grotesk", sans-serif);
  font-size: clamp(28px, 3vw, 42px);
  font-weight: 600;
  line-height: 1.08;
  letter-spacing: -0.015em;
  color: var(--ink-inv, #f5f2ea);
  margin: 0 0 32px 0;
  max-width: 22ch;
}

.tp-detail {
  border-top: 1px solid rgba(255,255,255,0.08);
  padding-top: 24px;
}

.tp-detail-label {
  font-family: "JetBrains Mono", ui-monospace, monospace;
  font-size: 10px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--accent);
  margin-bottom: 18px;
}

.tp-detail-grid {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.tp-item {
  display: grid;
  grid-template-columns: 28px 1fr;
  gap: 12px;
  align-items: baseline;
  font-family: var(--font-body, "Inter", sans-serif);
  font-size: 15px;
  line-height: 1.55;
  color: rgba(245,242,234,0.78);
}

.tp-item-num {
  font-family: "JetBrains Mono", ui-monospace, monospace;
  font-size: 12px;
  color: rgba(255,255,255,0.35);
  letter-spacing: 0.05em;
}

.tp-schematic {
  width: 220px;
  height: 220px;
  color: rgba(255,255,255,0.7);
  align-self: start;
  position: sticky;
  top: 100px;
}

.tp-schematic svg {
  width: 100%;
  height: 100%;
  display: block;
}

.tp-divider {
  height: 1px;
  background: linear-gradient(to right,
    transparent 0%,
    rgba(255,255,255,0.15) 15%,
    rgba(255,255,255,0.15) 85%,
    transparent 100%);
  margin: 0;
}

/* Tablet */
@media (max-width: 1080px) {
  .tp-row {
    grid-template-columns: 100px 1fr 160px;
    gap: 32px;
  }
  .tp-schematic { width: 160px; height: 160px; position: static; }
  .tp-num { font-size: clamp(56px, 9vw, 88px); }
}

/* Mobile */
@media (max-width: 720px) {
  .tp-row {
    grid-template-columns: 1fr;
    gap: 20px;
    padding: 40px 0;
  }
  .tp-num {
    font-size: 64px;
    padding-top: 0;
  }
  .tp-num::after {
    margin-top: 12px;
  }
  .tp-lede {
    font-size: clamp(24px, 6vw, 32px);
    max-width: none;
  }
  .tp-schematic {
    width: 120px;
    height: 120px;
    margin-top: 8px;
    justify-self: end;
    opacity: 0.7;
  }
  .tp-tag { margin-bottom: 14px; }
}