/* ============================================================
   SPARDA — marketing site
   Editorial / minimal / light. One indigo accent.
   ============================================================ */

:root {
  --bg:        #F4F5F7;
  --bg-2:      #EEF1F8;
  --bg-3:      #F8F9FC;
  --paper:     #FFFFFF;
  --ink:       #0E1320;
  --ink-2:     #1B2A4A;     /* deep navy */
  --ink-3:     #475067;
  --muted:     #8A92A6;
  --line:      #E2E5EC;
  --line-2:    #D4D9E4;

  --accent:    #4F46E5;     /* electric indigo */
  --accent-2:  #6E66FF;
  --accent-ink:#3730A3;

  --dark:      #0F172A;
  --dark-2:    #0B1226;
  --dark-3:    #1A2440;

  --flag-blue: #0055A4;
  --flag-red:  #EF4135;

  --radius:    14px;
  --radius-sm: 8px;

  --serif: 'Inter', system-ui, sans-serif; /* same as sans, alias */
  --sans:  'Inter', ui-sans-serif, system-ui, sans-serif;
  --mono:  'JetBrains Mono', ui-monospace, monospace;

  --max:       1320px;
  --gutter:    clamp(20px, 4vw, 56px);
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

body {
  font-family: var(--sans);
  background: var(--bg);
  color: var(--ink);
  font-weight: 400;
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  font-feature-settings: 'ss01', 'cv11';
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }

::selection { background: var(--accent); color: #fff; }

/* ============================== TYPE PRIMS ============================== */

.kicker {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--muted);
  display: inline-block;
}
.kicker--light { color: rgba(255,255,255,0.55); }

.display {
  font-family: var(--sans);
  font-weight: 300;
  font-size: clamp(40px, 6.5vw, 96px);
  line-height: 0.98;
  letter-spacing: -0.035em;
  margin: 16px 0 0;
  color: var(--ink);
  text-wrap: balance;
}
.display em {
  font-style: italic;
  font-weight: 300;
  color: var(--accent);
}
.display .muted { color: var(--muted); font-weight: 200; }

.section-head {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 var(--gutter);
}
.section-head--center { text-align: center; }
.section-head--dark .display { color: #fff; }
.section-head--dark .display .muted { color: rgba(255,255,255,0.45); }

.section-lede {
  max-width: 56ch;
  font-size: 18px;
  color: var(--ink-3);
  margin: 28px 0 0;
}

/* ============================== BUTTONS ============================== */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 22px;
  font-family: var(--sans);
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0.005em;
  border-radius: 999px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform .25s ease, background .25s ease, color .25s ease, border-color .25s ease, box-shadow .25s ease;
  white-space: nowrap;
}
.btn--sm { padding: 9px 16px; font-size: 13px; }
.btn--lg { padding: 18px 28px; font-size: 15px; }
.btn--block { width: 100%; justify-content: center; }

.btn--primary {
  background: var(--ink);
  color: #fff;
  border-color: var(--ink);
}
.btn--primary:hover {
  background: var(--accent);
  border-color: var(--accent);
  transform: translateY(-1px);
  box-shadow: 0 14px 40px -16px rgba(79,70,229,0.55);
}

.btn--ghost {
  background: transparent;
  color: var(--ink);
  border-color: var(--line-2);
}
.btn--ghost:hover {
  background: var(--ink);
  color: #fff;
  border-color: var(--ink);
}
.btn--ghost-on-dark {
  color: #fff;
  border-color: rgba(255,255,255,0.35);
}
.btn--ghost-on-dark:hover {
  background: #fff;
  color: var(--dark);
  border-color: #fff;
}

/* ============================== NAV ============================== */

.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 50;
  backdrop-filter: blur(14px) saturate(140%);
  -webkit-backdrop-filter: blur(14px) saturate(140%);
  background: rgba(244,245,247,0.72);
  border-bottom: 1px solid rgba(0,0,0,0.04);
}
.nav__inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: 14px var(--gutter);
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 32px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 600;
  letter-spacing: 0.04em;
  font-size: 14px;
  color: var(--ink);
}
.nav__links {
  display: flex;
  gap: 28px;
  justify-content: center;
  font-size: 13px;
  color: var(--ink-3);
}
.nav__links a {
  position: relative;
  padding: 4px 0;
  transition: color .2s;
}
.nav__links a:hover { color: var(--ink); }
.nav__cta { display: flex; align-items: center; gap: 16px; }
.nav__locale {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--muted);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.locale-toggle__btn {
  background: none;
  border: 0;
  padding: 4px 4px;
  font: inherit;
  letter-spacing: inherit;
  color: var(--muted);
  cursor: pointer;
  transition: color .2s ease;
}
.locale-toggle__btn:hover { color: var(--ink); }
.locale-toggle__btn.is-active { color: var(--ink); }
.locale-toggle__sep { color: var(--line-2); }
@media (max-width: 880px) {
  .nav__links { display: none; }
  .nav__inner { grid-template-columns: auto 1fr; }
}

/* ============================== HERO ============================== */

.hero {
  position: relative;
  padding: 160px var(--gutter) 80px;
  text-align: center;
  overflow: hidden;
  isolation: isolate;
}
.hero__bg {
  position: absolute;
  inset: 0;
  z-index: -1;
}
.hero__gradient {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(80% 50% at 50% 30%, rgba(79,70,229,0.07), transparent 70%),
    linear-gradient(180deg, var(--bg-2) 0%, var(--bg-3) 60%, var(--bg) 100%);
  animation: heroDrift 18s ease-in-out infinite alternate;
}
@keyframes heroDrift {
  0% { background-position: 0% 0%, 0% 0%; }
  100% { background-position: 0% 8%, 0% 4%; }
}
.hero__grid {
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(circle at 1px 1px, rgba(11,18,38,0.16) 1px, transparent 1.4px);
  background-size: 32px 32px;
  opacity: 0.18;
  mask-image: radial-gradient(80% 70% at 50% 40%, #000 30%, transparent 75%);
  -webkit-mask-image: radial-gradient(80% 70% at 50% 40%, #000 30%, transparent 75%);
}

.hero__eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 8px 16px;
  border-radius: 999px;
  background: rgba(255,255,255,0.6);
  border: 1px solid var(--line);
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-3);
  backdrop-filter: blur(8px);
}
.hero__eyebrow .dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 4px rgba(79,70,229,0.18);
  animation: pulse 2.4s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.4); opacity: 0.5; }
}

.hero__title {
  font-family: var(--sans);
  font-weight: 200;
  font-size: clamp(48px, 9.2vw, 132px);
  line-height: 0.92;
  letter-spacing: -0.045em;
  margin: 28px auto 0;
  max-width: 14ch;
  color: var(--ink);
}
.hero__title em {
  font-style: italic;
  font-weight: 300;
  color: var(--accent);
}

.hero__canvas-wrap {
  position: relative;
  width: min(900px, 100%);
  height: clamp(360px, 52vw, 560px);
  margin: 16px auto 0;
}
#hero-canvas {
  width: 100%;
  height: 100%;
  display: block;
}
.hero__canvas-glow {
  position: absolute;
  left: 50%;
  bottom: 16%;
  width: 60%;
  height: 28%;
  transform: translateX(-50%);
  background: radial-gradient(50% 50% at 50% 50%, rgba(79,70,229,0.45), transparent 70%);
  filter: blur(28px);
  pointer-events: none;
  z-index: -1;
  animation: glowPulse 4.8s ease-in-out infinite;
}
@keyframes glowPulse {
  0%, 100% { opacity: 0.7; transform: translateX(-50%) scale(1); }
  50% { opacity: 1; transform: translateX(-50%) scale(1.05); }
}
.hero__canvas-floor {
  position: absolute;
  left: 50%;
  bottom: 12%;
  width: 80%;
  height: 1px;
  transform: translateX(-50%);
  background: linear-gradient(90deg, transparent, rgba(11,18,38,0.18), transparent);
  pointer-events: none;
}

.hero__hud {
  position: absolute;
  top: 14%;
  left: 0;
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.06em;
  color: var(--ink-3);
  text-align: left;
  display: grid;
  gap: 6px;
  padding: 12px 14px;
  border-left: 1px solid var(--line-2);
  pointer-events: none;
  opacity: 0.85;
}
.hero__hud--right {
  left: auto;
  right: 0;
  text-align: right;
  border-left: none;
  border-right: 1px solid var(--line-2);
}
.hud-row {
  display: flex;
  gap: 14px;
  justify-content: space-between;
  min-width: 180px;
}
.hero__hud--right .hud-row { flex-direction: row-reverse; }
.hud-k { color: var(--muted); text-transform: uppercase; }
.hud-v { color: var(--ink); }
.hud-row--ok .hud-v { color: var(--accent); }
@media (max-width: 720px) {
  .hero__hud { display: none; }
}

.hero__sub {
  max-width: 56ch;
  margin: 30px auto 0;
  font-size: clamp(15px, 1.4vw, 19px);
  color: var(--ink-3);
  line-height: 1.55;
  text-wrap: pretty;
}
.hero__cta {
  margin-top: 28px;
  display: inline-flex;
  gap: 12px;
  flex-wrap: wrap;
  justify-content: center;
}

.hero__scroll {
  margin-top: 80px;
  display: inline-flex;
  align-items: center;
  gap: 14px;
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--muted);
}
.hero__scroll-line {
  width: 60px;
  height: 1px;
  background: linear-gradient(90deg, var(--muted), transparent);
  position: relative;
  overflow: hidden;
}
.hero__scroll-line::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
  animation: scrollPulse 2.4s ease-in-out infinite;
}
@keyframes scrollPulse {
  0% { transform: translateX(-100%); }
  100% { transform: translateX(100%); }
}

/* ============================== STRIPE ============================== */

.stripe {
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: var(--paper);
}
.stripe__row {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 var(--gutter);
  display: grid;
  grid-template-columns: repeat(4, 1fr);
}
.stripe__cell {
  padding: 22px 0;
  display: flex;
  align-items: center;
  gap: 14px;
  border-left: 1px solid var(--line);
  padding-left: 24px;
}
.stripe__cell:first-child { border-left: none; padding-left: 0; }
.stripe__k {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--muted);
  letter-spacing: 0.12em;
}
.stripe__v {
  font-size: 14px;
  color: var(--ink);
  font-weight: 500;
}
@media (max-width: 800px) {
  .stripe__row { grid-template-columns: 1fr 1fr; }
  .stripe__cell:nth-child(3) { border-left: none; padding-left: 0; }
}

/* ============================== PROBLEM ============================== */

.problem {
  background: var(--dark);
  color: #fff;
  padding: 140px 0 160px;
  position: relative;
  overflow: hidden;
}
.problem::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(70% 40% at 20% 10%, rgba(79,70,229,0.18), transparent 60%),
    radial-gradient(60% 40% at 80% 90%, rgba(79,70,229,0.10), transparent 60%);
  pointer-events: none;
}
.problem .kicker { color: rgba(255,255,255,0.5); }

.stats {
  max-width: var(--max);
  margin: 80px auto 0;
  padding: 0 var(--gutter);
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  border-top: 1px solid rgba(255,255,255,0.08);
}
.stat {
  padding: 40px 28px;
  border-right: 1px solid rgba(255,255,255,0.08);
}
.stat:last-child { border-right: none; }
.stat__num {
  display: flex;
  align-items: baseline;
  font-family: var(--sans);
  font-weight: 200;
  font-size: clamp(48px, 5.4vw, 80px);
  letter-spacing: -0.03em;
  line-height: 1;
  color: #fff;
}
.stat__count { display: inline-block; }
.stat__unit {
  font-size: 0.42em;
  color: var(--accent-2);
  margin-left: 4px;
  font-weight: 300;
}
.stat__unit--lead { margin: 0 4px 0 0; color: var(--accent-2); }
.stat__label {
  margin: 22px 0 18px;
  font-size: 14px;
  color: rgba(255,255,255,0.78);
  line-height: 1.5;
  max-width: 24ch;
}
.stat__src {
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.35);
}
@media (max-width: 900px) {
  .stats { grid-template-columns: 1fr 1fr; }
  .stat:nth-child(2) { border-right: none; }
  .stat:nth-child(odd) { border-right: 1px solid rgba(255,255,255,0.08); }
  .stat:nth-child(1), .stat:nth-child(2) { border-bottom: 1px solid rgba(255,255,255,0.08); }
}

.problem__quote {
  max-width: var(--max);
  margin: 80px auto 0;
  padding: 0 var(--gutter);
  display: flex;
  flex-direction: column;
  gap: 14px;
  border-left: 2px solid var(--accent);
  padding-left: calc(var(--gutter) + 12px);
}
.problem__quote p {
  margin: 0;
  font-size: clamp(20px, 2vw, 28px);
  font-weight: 300;
  letter-spacing: -0.01em;
  color: #fff;
  max-width: 36ch;
}
.problem__quote span {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.45);
}

/* ============================== SOLUTION ============================== */

.solution {
  padding: 160px 0;
  background: var(--bg);
}
.layers {
  max-width: var(--max);
  margin: 80px auto 0;
  padding: 0 var(--gutter);
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  gap: 80px;
  align-items: start;
}
.layers__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0;
  border-top: 1px solid var(--line);
}
.layer {
  display: grid;
  grid-template-columns: 80px 1fr;
  gap: 28px;
  padding: 36px 0 36px;
  border-bottom: 1px solid var(--line);
  position: relative;
  transition: padding .3s ease;
}
.layer:hover {
  padding-left: 12px;
}
.layer:hover .layer__num {
  color: var(--accent);
}
.layer__num {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--muted);
  padding-top: 6px;
  transition: color .2s;
}
.layer__body h3 {
  margin: 0 0 10px;
  font-size: 24px;
  font-weight: 500;
  letter-spacing: -0.01em;
}
.layer__body p {
  margin: 0;
  color: var(--ink-3);
  max-width: 50ch;
  font-size: 15.5px;
}
.layer__chips {
  list-style: none;
  margin: 18px 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}
.layer__chips li {
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-3);
  padding: 5px 10px;
  border: 1px solid var(--line-2);
  border-radius: 4px;
  background: var(--paper);
}

/* solution diagram */
.layers__diagram {
  position: sticky;
  top: 100px;
  aspect-ratio: 1 / 1.05;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 32px;
  display: flex;
  flex-direction: column;
  justify-content: stretch;
  position: relative;
  overflow: hidden;
}
.layers__diagram::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(circle at 1px 1px, rgba(11,18,38,0.08) 1px, transparent 1.4px);
  background-size: 14px 14px;
  opacity: 0.6;
}
.diagram-stack {
  position: relative;
  display: grid;
  grid-template-rows: 1fr 1fr 1fr auto;
  gap: 16px;
  flex: 1;
  z-index: 1;
}
.diagram-block {
  border: 1px solid var(--line);
  background: linear-gradient(180deg, var(--bg-3), var(--paper));
  border-radius: var(--radius-sm);
  padding: 18px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: relative;
  min-height: 76px;
  transition: transform .35s ease, border-color .35s ease;
}
.diagram-block::after {
  content: "";
  position: absolute;
  bottom: -10px;
  left: 50%;
  transform: translateX(-50%);
  width: 1px;
  height: 8px;
  background: var(--line-2);
}
.diagram-block:last-child::after { display: none; }
.diagram-block:hover {
  border-color: var(--accent);
  transform: translateX(2px);
}
.diagram-tag {
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.14em;
  color: var(--muted);
}
.diagram-icon { display: flex; gap: 4px; }
.diagram-icon span {
  width: 10px; height: 10px;
  border: 1px solid var(--ink-3);
  border-radius: 2px;
}
.diagram-bars { display: flex; gap: 3px; align-items: end; }
.diagram-bars i {
  width: 4px;
  background: var(--accent);
  display: block;
  height: 14px;
  border-radius: 1px;
  opacity: 0.7;
}
.diagram-bars i:nth-child(odd) { height: 22px; opacity: 1; }
.diagram-bars i:nth-child(3n) { height: 10px; opacity: 0.5; }
.diagram-vents { display: flex; gap: 2px; }
.diagram-vents i {
  width: 2px;
  height: 22px;
  background: var(--ink-3);
  display: block;
  border-radius: 1px;
}
.diagram-floor {
  margin-top: 18px;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--line-2), transparent);
}

@media (max-width: 980px) {
  .layers { grid-template-columns: 1fr; gap: 40px; }
  .layers__diagram { position: static; max-width: 480px; }
}

/* ============================== TIERS ============================== */

.tiers {
  background: var(--paper);
  padding: 160px 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.tier-grid {
  max-width: var(--max);
  margin: 80px auto 0;
  padding: 0 var(--gutter);
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.tier {
  position: relative;
  background: var(--bg-3);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 36px 28px;
  display: flex;
  flex-direction: column;
  gap: 22px;
  transition: transform .35s ease, box-shadow .35s ease, border-color .35s ease;
}
.tier:hover {
  transform: translateY(-4px);
  box-shadow: 0 32px 60px -32px rgba(15,23,42,0.18);
  border-color: var(--line-2);
}
.tier--featured {
  background: var(--ink);
  color: #fff;
  border-color: var(--ink);
}
.tier--featured:hover {
  box-shadow: 0 32px 60px -28px rgba(79,70,229,0.45);
  border-color: var(--accent);
}
.tier__badge {
  position: absolute;
  top: 0;
  left: 28px;
  transform: translateY(-50%);
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  background: var(--accent);
  color: #fff;
  padding: 6px 12px;
  border-radius: 999px;
}
.tier__head {
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.tier__id {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--muted);
}
.tier--featured .tier__id { color: rgba(255,255,255,0.5); }
.tier__name {
  font-size: 28px;
  font-weight: 300;
  letter-spacing: -0.02em;
}
.tier__for {
  margin: 0;
  font-size: 13.5px;
  color: var(--ink-3);
}
.tier--featured .tier__for { color: rgba(255,255,255,0.6); }

.tier__price {
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding: 22px 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.tier--featured .tier__price {
  border-color: rgba(255,255,255,0.1);
}
.tier__from {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
}
.tier__amount {
  font-size: clamp(32px, 3vw, 40px);
  font-weight: 300;
  letter-spacing: -0.02em;
}
.tier__price--quote {
  flex-direction: column;
  align-items: flex-start;
  gap: 5px;
}
.tier__quote {
  font-size: 21px;
  font-weight: 400;
  letter-spacing: -0.01em;
}
.tier__quote-en {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
}

.tier__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
  font-size: 14px;
  color: var(--ink-3);
}
.tier--featured .tier__list { color: rgba(255,255,255,0.78); }
.tier__list li {
  display: flex;
  gap: 10px;
  align-items: baseline;
}
.tier__list li::before {
  content: "/";
  color: var(--accent);
  font-family: var(--mono);
  font-size: 11px;
  flex-shrink: 0;
}
.tier__list b { color: var(--ink); font-weight: 500; }
.tier--featured .tier__list b { color: #fff; }

.tier .btn--ghost { border-color: var(--line-2); }
.tier .btn--block { margin-top: auto; }
.tier--featured .btn--primary { background: var(--accent); border-color: var(--accent); }
.tier--featured .btn--primary:hover { background: #fff; color: var(--ink); border-color: #fff; box-shadow: none; }

.tiers__foot {
  max-width: var(--max);
  margin: 60px auto 0;
  padding: 0 var(--gutter);
  text-align: center;
  font-size: 13.5px;
  color: var(--muted);
}

@media (max-width: 980px) {
  .tier-grid { grid-template-columns: 1fr; }
}

/* ============================== AIRGAP ============================== */

.airgap {
  background: var(--bg);
  padding: 160px 0;
}
.diode {
  max-width: var(--max);
  margin: 80px auto 0;
  padding: 60px var(--gutter);
  display: grid;
  grid-template-columns: 1fr 2fr 1fr;
  align-items: center;
  gap: 0;
  position: relative;
}
.diode::before {
  content: "";
  position: absolute;
  inset: 30px var(--gutter);
  border: 1px dashed var(--line-2);
  border-radius: var(--radius);
  pointer-events: none;
}

.diode__node {
  display: flex;
  justify-content: center;
}
.diode__node-frame {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  padding: 28px 22px;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  min-width: 180px;
  text-align: center;
  color: var(--ink);
  position: relative;
  z-index: 2;
}
.diode__node-frame--off {
  background: repeating-linear-gradient(135deg, var(--paper), var(--paper) 6px, var(--bg-2) 6px, var(--bg-2) 7px);
  color: var(--muted);
}
.diode__node-tag {
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}
.diode__node-sub {
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.08em;
  color: var(--muted);
}
.diode__cross { color: var(--muted); }

.diode__center {
  display: flex;
  flex-direction: column;
  align-items: stretch;
  position: relative;
}
.diode__appliance {
  margin: 0 auto 30px;
  padding: 18px 28px;
  background: var(--ink);
  color: #fff;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  gap: 18px;
  position: relative;
  box-shadow: 0 24px 40px -24px rgba(15,23,42,0.5);
}
.diode__appliance-vents {
  display: flex; gap: 2px;
}
.diode__appliance-vents i {
  width: 2px;
  height: 26px;
  background: rgba(255,255,255,0.5);
  border-radius: 1px;
}
.diode__appliance-led {
  position: absolute;
  bottom: -2px;
  left: 16px;
  right: 16px;
  height: 2px;
  background: var(--accent);
  border-radius: 2px;
  box-shadow: 0 0 12px var(--accent);
  animation: ledPulse 3s ease-in-out infinite;
}
@keyframes ledPulse {
  0%, 100% { opacity: 0.7; }
  50% { opacity: 1; }
}
.diode__appliance-tag {
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.16em;
}

.diode__pipes {
  position: absolute;
  inset: 50% 0 auto 0;
  transform: translateY(-50%);
  display: flex;
  justify-content: space-between;
  pointer-events: none;
  z-index: 1;
}
.diode__pipe {
  position: relative;
  width: calc(50% - 60px);
  height: 28px;
  display: flex;
  align-items: center;
}
.diode__pipe--bi { left: 0; }
.diode__pipe--diode { right: 0; }
.diode__pipe-line {
  position: absolute;
  top: 50%;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--line-2) 20%, var(--line-2) 80%, transparent);
}
.diode__pipe--diode .diode__pipe-line {
  background: linear-gradient(90deg, transparent, var(--accent) 30%, var(--accent) 70%, transparent);
  height: 2px;
  box-shadow: 0 0 16px rgba(79,70,229,0.4);
}
.diode__particles {
  position: absolute;
  inset: 0;
  overflow: hidden;
}
.diode__particles i {
  position: absolute;
  top: 50%;
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 8px var(--accent);
  transform: translateY(-50%);
  animation: particleFlow 3.2s linear infinite;
  animation-delay: var(--d, 0s);
}
@keyframes particleFlow {
  0% { left: -8px; opacity: 0; }
  10% { opacity: 1; }
  90% { opacity: 1; }
  100% { left: 100%; opacity: 0; }
}
.diode__pipe--bi .diode__particles i:nth-child(even) {
  animation-name: particleFlowBack;
  background: var(--ink-3);
  box-shadow: none;
}
@keyframes particleFlowBack {
  0% { left: 100%; opacity: 0; }
  10% { opacity: 1; }
  90% { opacity: 1; }
  100% { left: -8px; opacity: 0; }
}
.diode__pipe-label {
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translate(-50%, 8px);
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
  white-space: nowrap;
}
.diode__pipe--diode .diode__pipe-label { color: var(--accent); }
.diode__pipe-arrow {
  position: absolute;
  right: 0;
  top: 50%;
  transform: translate(50%, -50%);
  color: var(--accent);
  font-size: 12px;
  filter: drop-shadow(0 0 6px rgba(79,70,229,0.6));
}

.airgap__bullets {
  max-width: var(--max);
  margin: 60px auto 0;
  padding: 0 var(--gutter);
  list-style: none;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
  font-size: 15px;
  color: var(--ink-3);
}
.airgap__bullets li {
  display: flex;
  gap: 14px;
  align-items: baseline;
  border-top: 1px solid var(--line);
  padding-top: 18px;
}
.airgap__bullets li b { color: var(--ink); font-weight: 500; }
.airgap__bullets li span {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--muted);
}

@media (max-width: 980px) {
  .diode { grid-template-columns: 1fr; gap: 24px; padding: 30px var(--gutter); }
  .diode__pipes { display: none; }
  .airgap__bullets { grid-template-columns: 1fr; }
}

/* ============================== SOVEREIGN ============================== */

.sovereign {
  padding: 160px 0;
  background: var(--paper);
  border-top: 1px solid var(--line);
}
.sovereign__head {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 var(--gutter);
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 14px;
}
.sovereign__flag {
  display: flex;
  width: 64px;
  height: 8px;
  overflow: hidden;
  border-radius: 2px;
}
.sovereign__flag i { flex: 1; display: block; }
.flag-bleu { background: var(--flag-blue); }
.flag-blanc { background: #fff; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.flag-rouge { background: var(--flag-red); }

.sov-grid {
  max-width: var(--max);
  margin: 80px auto 0;
  padding: 0 var(--gutter);
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  border-top: 1px solid var(--line);
}
.sov-card {
  padding: 36px 28px;
  border-right: 1px solid var(--line);
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.sov-card:last-child { border-right: none; }
.sov-card__id {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--accent);
}
.sov-card h4 {
  margin: 0;
  font-size: 20px;
  font-weight: 400;
  letter-spacing: -0.015em;
  line-height: 1.2;
  color: var(--ink);
}
.sov-card p {
  margin: 0;
  font-size: 14px;
  color: var(--ink-3);
  line-height: 1.55;
}
@media (max-width: 980px) {
  .sov-grid { grid-template-columns: 1fr 1fr; }
  .sov-card:nth-child(2) { border-right: none; }
  .sov-card:nth-child(odd) { border-right: 1px solid var(--line); }
  .sov-card:nth-child(1), .sov-card:nth-child(2) { border-bottom: 1px solid var(--line); }
}

/* ============================== PROOF ============================== */

.proof {
  background: var(--bg);
  padding: 140px 0;
}
.proof__title { max-width: 18ch; margin-left: auto; margin-right: auto; }

.logos {
  max-width: var(--max);
  margin: 60px auto 0;
  padding: 0 var(--gutter);
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.logo-cell {
  padding: 32px 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  font-size: 14px;
  font-weight: 500;
  color: var(--ink-3);
  border-right: 1px solid var(--line);
  filter: grayscale(1) opacity(0.7);
  transition: filter .25s ease;
}
.logo-cell:last-child { border-right: none; }
.logo-cell:hover { filter: grayscale(0) opacity(1); color: var(--ink); }
.logo-mark {
  font-size: 22px;
  color: var(--accent);
  line-height: 1;
}
@media (max-width: 980px) {
  .logos { grid-template-columns: 1fr 1fr; }
  .logo-cell { border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); }
  .logo-cell:nth-child(even) { border-right: none; }
  .logo-cell:last-child { grid-column: span 2; border-bottom: none; }
}

.quote {
  max-width: 880px;
  margin: 80px auto 0;
  padding: 0 var(--gutter);
  text-align: center;
}
.quote blockquote {
  margin: 0;
  font-size: clamp(20px, 2.4vw, 30px);
  font-weight: 300;
  letter-spacing: -0.012em;
  color: var(--ink);
  line-height: 1.35;
  text-wrap: balance;
}
.quote blockquote::before { content: "“"; color: var(--accent); margin-right: 4px; }
.quote blockquote::after { content: "”"; color: var(--accent); margin-left: 4px; }
.quote figcaption {
  margin-top: 28px;
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-size: 13.5px;
  color: var(--ink-3);
}
.quote__avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--ink);
  color: #fff;
  display: grid;
  place-items: center;
  font-weight: 500;
}
.quote figcaption b { color: var(--ink); font-weight: 500; }

/* ============================== CTA FINALE ============================== */

.cta-final {
  position: relative;
  background: var(--dark);
  color: #fff;
  padding: 180px var(--gutter) 160px;
  overflow: hidden;
  isolation: isolate;
  text-align: center;
}
.cta-final__bg {
  position: absolute;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(60% 40% at 50% 60%, rgba(79,70,229,0.32), transparent 70%),
    radial-gradient(40% 30% at 80% 30%, rgba(110,102,255,0.18), transparent 70%);
}
.cta-final__bg::before {
  content: "";
  position: absolute; inset: 0;
  background-image:
    radial-gradient(circle at 1px 1px, rgba(255,255,255,0.06) 1px, transparent 1.4px);
  background-size: 40px 40px;
  mask-image: radial-gradient(60% 60% at 50% 50%, #000, transparent 80%);
  -webkit-mask-image: radial-gradient(60% 60% at 50% 50%, #000, transparent 80%);
}
.cta-final__inner {
  max-width: 900px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 28px;
}
.cta-final__title {
  font-size: clamp(48px, 8vw, 120px);
  font-weight: 200;
  line-height: 0.95;
  letter-spacing: -0.04em;
  margin: 8px 0 0;
}
.cta-final__title em {
  font-style: italic;
  color: var(--accent-2);
  font-weight: 300;
}
.cta-final__sub {
  margin: 0;
  font-size: 17px;
  color: rgba(255,255,255,0.7);
  max-width: 50ch;
}
.cta-final__buttons {
  display: inline-flex;
  gap: 12px;
  flex-wrap: wrap;
  justify-content: center;
}
.cta-final__buttons .btn--primary { background: var(--accent); border-color: var(--accent); }
.cta-final__buttons .btn--primary:hover { background: #fff; color: var(--ink); border-color: #fff; }
.cta-final__mail {
  font-family: var(--mono);
  font-size: 12.5px;
  letter-spacing: 0.14em;
  color: rgba(255,255,255,0.55);
  margin-top: 8px;
}
.cta-final__mail:hover { color: #fff; }

/* ============================== FOOTER ============================== */

.foot {
  background: var(--dark-2);
  color: rgba(255,255,255,0.7);
  padding: 80px var(--gutter) 28px;
}
.foot__row {
  max-width: var(--max);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 60px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
  padding-bottom: 60px;
}
.brand--foot { color: #fff; }
.foot__brand p {
  margin: 24px 0 0;
  font-size: 13px;
  line-height: 1.6;
  color: rgba(255,255,255,0.5);
}
.foot__cols {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
}
.foot__cols h6 {
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.4);
  margin: 0 0 18px;
  font-weight: 400;
}
.foot__cols a {
  display: block;
  font-size: 13.5px;
  color: rgba(255,255,255,0.7);
  padding: 5px 0;
  transition: color .2s;
}
.foot__cols a:hover { color: #fff; }
.foot__base {
  max-width: var(--max);
  margin: 0 auto;
  padding-top: 24px;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.12em;
  color: rgba(255,255,255,0.4);
  text-transform: uppercase;
}
.foot__base > :last-child { text-align: right; }
.foot__tag { color: var(--accent-2); }

@media (max-width: 980px) {
  .foot__row { grid-template-columns: 1fr; gap: 40px; }
  .foot__cols { grid-template-columns: 1fr 1fr; }
  .foot__base { grid-template-columns: 1fr; gap: 6px; text-align: center; }
  .foot__base > :last-child { text-align: center; }
}