:root {
  --product-accent: #0071e3;
  --product-accent-rgb: 0, 113, 227;
  --product-accent-2: #66b3ff;
  --product-panel: rgba(255, 255, 255, .72);
  --product-panel-solid: #fff;
  --product-shadow: 0 28px 80px rgba(0, 0, 0, .11);
}

html[data-theme="dark"] {
  --product-panel: rgba(23, 23, 26, .78);
  --product-panel-solid: #151517;
  --product-shadow: 0 32px 90px rgba(0, 0, 0, .44);
}

html[data-product="mail"] {
  --product-accent: #d9573f;
  --product-accent-rgb: 217, 87, 63;
  --product-accent-2: #ff9b70;
}

html[data-product="opc"] {
  --product-accent: #e2684f;
  --product-accent-rgb: 226, 104, 79;
  --product-accent-2: #ffae82;
}

.product-site { background: var(--white); }
.product-site::before {
  content: "";
  position: fixed;
  z-index: -2;
  inset: 0;
  background:
    radial-gradient(circle at 78% 7%, rgba(var(--product-accent-rgb), .10), transparent 28%),
    radial-gradient(circle at 18% 54%, rgba(var(--product-accent-rgb), .055), transparent 24%),
    var(--white);
  pointer-events: none;
}

.product-site .site-header { --width: 1240px; }
.product-site .brand .product-brand-name {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  margin-left: 8px;
  padding-left: 14px;
  border-left: 1px solid var(--line);
  font-size: 13px;
  font-weight: 600;
  white-space: nowrap;
}
.product-site .desktop-nav a.is-active { color: var(--product-accent); }
.product-site .desktop-nav a::before {
  background:
    radial-gradient(circle at var(--glass-x) var(--glass-y), rgba(255,255,255,.92), transparent 42%),
    linear-gradient(180deg, rgba(255,255,255,.82), rgba(var(--product-accent-rgb), .12));
}
.product-site .header-cta { background: linear-gradient(180deg, rgba(var(--product-accent-rgb), .94), rgba(var(--product-accent-rgb), .78)); }
.product-site .header-cta:hover { background: linear-gradient(180deg, rgba(var(--product-accent-rgb), 1), rgba(var(--product-accent-rgb), .84)); filter: brightness(1.06); }
html[data-theme="dark"] .product-site .desktop-nav a::before {
  background:
    radial-gradient(circle at var(--glass-x) var(--glass-y), rgba(255,255,255,.26), transparent 44%),
    linear-gradient(180deg, rgba(72,72,78,.78), rgba(var(--product-accent-rgb), .14));
}

.product-main { overflow: clip; }
.product-shell { width: min(1240px, calc(100% - 48px)); margin-inline: auto; }
.product-kicker {
  margin: 0 0 18px;
  color: var(--product-accent);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .15em;
  text-transform: uppercase;
}

.product-hero {
  position: relative;
  min-height: calc(100svh - 48px);
  padding: clamp(88px, 11vw, 150px) 0 72px;
  display: grid;
  align-content: center;
}
.product-hero::before {
  content: "";
  position: absolute;
  top: 5%;
  left: 50%;
  width: min(780px, 76vw);
  aspect-ratio: 1;
  border-radius: 50%;
  transform: translateX(-50%);
  background: radial-gradient(circle, rgba(var(--product-accent-rgb), .16), rgba(var(--product-accent-rgb), 0) 68%);
  filter: blur(16px);
  pointer-events: none;
  animation: breathe 8s ease-in-out infinite;
}
.product-hero-copy {
  position: relative;
  z-index: 2;
  max-width: 960px;
  margin: 0 auto 58px;
  text-align: center;
}
.product-hero h1 {
  max-width: 930px;
  margin: 0 auto;
  color: var(--ink);
  font-size: clamp(52px, 7.4vw, 102px);
  font-weight: 720;
  letter-spacing: -.066em;
  line-height: .98;
}
html[data-product="mail"] .product-hero h1 {
  max-width: 860px;
  font-size: clamp(48px, 6.2vw, 86px);
  letter-spacing: -.055em;
  line-height: 1.02;
}
html[data-product="opc"] .product-hero h1 {
  max-width: 900px;
  font-size: clamp(50px, 6.8vw, 94px);
  letter-spacing: -.06em;
}
.product-hero h1 em {
  display: inline-block;
  color: var(--product-accent);
  font-style: normal;
  background: linear-gradient(110deg, var(--product-accent), var(--product-accent-2));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.product-hero-lead {
  max-width: 720px;
  margin: 30px auto 0;
  color: var(--muted);
  font-size: clamp(19px, 2vw, 25px);
  font-weight: 480;
  letter-spacing: -.025em;
  line-height: 1.5;
}
.product-hero-actions { display: flex; justify-content: center; gap: 12px; margin-top: 34px; }
.product-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 48px;
  padding: 0 22px;
  border: 1px solid transparent;
  border-radius: 999px;
  background: var(--product-accent);
  color: #fff;
  font-size: 15px;
  font-weight: 650;
  transition: transform .28s cubic-bezier(.2,.8,.2,1), box-shadow .28s ease, filter .28s ease;
}
.product-button:hover { transform: translateY(-2px); box-shadow: 0 12px 30px rgba(var(--product-accent-rgb), .26); filter: brightness(1.05); }
.product-button.secondary { border-color: var(--line); background: var(--product-panel); color: var(--ink); backdrop-filter: blur(18px); }
.product-button.secondary:hover { box-shadow: 0 12px 30px rgba(0,0,0,.08); }
.product-button .arrow { transition: transform .25s ease; }
.product-button:hover .arrow { transform: translateX(3px); }

.hero-proof {
  position: relative;
  z-index: 2;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 9px;
  margin: 0 0 28px;
  padding: 0;
  list-style: none;
}
.hero-proof li {
  padding: 9px 14px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--product-panel);
  color: var(--muted);
  font-size: 12px;
  font-weight: 600;
  backdrop-filter: blur(18px);
}
.hero-proof li::before { content: ""; display: inline-block; width: 6px; height: 6px; margin-right: 8px; border-radius: 50%; background: var(--product-accent); box-shadow: 0 0 0 4px rgba(var(--product-accent-rgb), .1); vertical-align: 1px; }

.product-stage {
  position: relative;
  z-index: 2;
  width: min(1120px, 94%);
  margin-inline: auto;
  padding: 9px;
  border: 1px solid rgba(255,255,255,.32);
  border-radius: 30px;
  background: linear-gradient(145deg, rgba(255,255,255,.82), rgba(var(--product-accent-rgb), .08));
  box-shadow: 0 50px 120px rgba(0,0,0,.16), 0 0 80px rgba(var(--product-accent-rgb), .10);
  transform: perspective(1600px) rotateX(var(--stage-rotate, 0deg)) translateY(var(--stage-y, 0px));
  transform-origin: center top;
  transition: transform .1s linear;
}
html[data-theme="dark"] .product-stage { border-color: rgba(255,255,255,.12); background: linear-gradient(145deg, rgba(255,255,255,.1), rgba(var(--product-accent-rgb), .08)); }
.product-stage-frame { overflow: hidden; border-radius: 22px; background: #111; }
.stage-bar { height: 36px; padding: 0 14px; display: flex; align-items: center; gap: 7px; background: #202022; color: #a1a1a6; }
.stage-bar i { width: 8px; height: 8px; border-radius: 50%; background: #535357; }
.stage-bar small { margin-left: auto; font-size: 9px; letter-spacing: .12em; }
.product-stage img { display: block; width: 100%; height: auto; }
html[data-product="opc"] .opc-stage {
  background: linear-gradient(145deg, rgba(255,255,255,.88), rgba(var(--product-accent-rgb), .15));
  box-shadow: 0 50px 120px rgba(57,31,24,.2), 0 0 90px rgba(var(--product-accent-rgb), .13);
}
html[data-product="opc"] .opc-stage .stage-bar { background: #1d1916; }
html[data-product="opc"] .opc-stage .stage-bar i:first-child { background: #e2684f; }

.product-section {
  padding: clamp(96px, 12vw, 166px) 0;
  content-visibility: auto;
  contain-intrinsic-size: auto 820px;
}
.section-heading { max-width: 830px; margin-bottom: clamp(44px, 6vw, 76px); }
.section-heading.center { margin-inline: auto; text-align: center; }
.section-heading h2 {
  margin: 0;
  font-size: clamp(38px, 5.1vw, 72px);
  font-weight: 700;
  letter-spacing: -.052em;
  line-height: 1.05;
}
.section-heading > p:last-child { max-width: 680px; margin: 24px 0 0; color: var(--muted); font-size: clamp(17px, 1.65vw, 22px); line-height: 1.58; }
.section-heading.center > p:last-child { margin-inline: auto; }

.manifesto { padding-top: clamp(110px, 14vw, 190px); }
.manifesto-grid { display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(300px, .9fr); gap: clamp(40px, 8vw, 110px); align-items: end; }
.manifesto h2 { margin: 0; font-size: clamp(42px, 6vw, 82px); letter-spacing: -.06em; line-height: 1; }
.manifesto h2 span { color: var(--product-accent); }
.manifesto-copy { padding-bottom: 4px; }
.manifesto-copy p { margin: 0; color: var(--muted); font-size: clamp(18px, 1.8vw, 23px); line-height: 1.62; }
.manifesto-stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; margin-top: 32px; }
.manifesto-stats div { padding-top: 17px; border-top: 1px solid var(--line); }
.manifesto-stats b { display: block; color: var(--ink); font-size: 23px; letter-spacing: -.04em; }
.manifesto-stats small { color: var(--muted); font-size: 12px; }

.fde-section {
  position: relative;
  overflow: hidden;
  background:
    radial-gradient(circle at 82% 16%, rgba(var(--product-accent-rgb), .13), transparent 29%),
    linear-gradient(180deg, var(--soft-2), var(--bg));
}
.fde-section::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image: linear-gradient(rgba(var(--product-accent-rgb), .045) 1px, transparent 1px), linear-gradient(90deg, rgba(var(--product-accent-rgb), .045) 1px, transparent 1px);
  background-size: 72px 72px;
  mask-image: linear-gradient(to bottom, black, transparent 76%);
}
.fde-section .product-shell { position: relative; z-index: 1; }
.fde-grid { display: grid; grid-template-columns: repeat(12, minmax(0, 1fr)); gap: 16px; }
.fde-card {
  grid-column: span 4;
  min-height: 390px;
  padding: 34px;
  display: flex;
  flex-direction: column;
  border: 1px solid var(--line);
  border-radius: 32px;
  background: color-mix(in srgb, var(--product-panel-solid) 92%, transparent);
  box-shadow: 0 20px 55px rgba(0,0,0,.055), inset 0 1px 0 rgba(255,255,255,.12);
  transition: transform .45s cubic-bezier(.2,.8,.2,1), border-color .3s ease, box-shadow .35s ease;
}
.fde-card:hover { transform: translateY(-7px); border-color: rgba(var(--product-accent-rgb), .34); box-shadow: 0 30px 75px rgba(0,0,0,.1); }
.fde-card > span { color: var(--product-accent); font-size: 11px; font-weight: 780; letter-spacing: .12em; }
.fde-card h3 { margin: 78px 0 16px; font-size: clamp(27px, 2.4vw, 36px); letter-spacing: -.05em; line-height: 1.08; }
.fde-card p { margin: 0; color: var(--muted); font-size: 16px; line-height: 1.7; }
.fde-card strong { margin-top: auto; padding-top: 28px; color: var(--ink); font-size: 14px; line-height: 1.55; }
.fde-card.opc { background: linear-gradient(155deg, rgba(var(--product-accent-rgb), .15), var(--product-panel-solid) 66%); }
.fde-card.delivery { background: #09090b; border-color: rgba(255,255,255,.12); }
.fde-card.delivery h3, .fde-card.delivery strong { color: #fff; }
.fde-card.delivery p { color: #a1a1a6; }
.fde-card.delivery > span { color: var(--product-accent-2); }
.fde-track-panel { margin-top: 18px; padding: clamp(30px, 5vw, 52px); border: 1px solid var(--line); border-radius: 32px; background: var(--product-panel); backdrop-filter: blur(22px); }
.fde-track-heading { display: flex; align-items: baseline; justify-content: space-between; gap: 30px; margin-bottom: 36px; }
.fde-track-heading > span { flex: 0 0 auto; color: var(--product-accent); font-size: 11px; font-weight: 780; letter-spacing: .13em; }
.fde-track-heading h3 { max-width: 650px; margin: 0; font-size: clamp(25px, 3vw, 38px); letter-spacing: -.045em; line-height: 1.12; text-align: right; }
.fde-track { display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); }
.fde-track div { position: relative; padding: 22px 18px 0 0; border-top: 1px solid var(--line); }
.fde-track div:not(:last-child)::after { content: "→"; position: absolute; top: 17px; right: 16px; color: var(--muted); }
.fde-track b { display: block; margin-bottom: 48px; color: var(--product-accent); font-size: 12px; }
.fde-track span { display: block; max-width: 120px; color: var(--ink); font-size: 15px; font-weight: 680; line-height: 1.4; }

.platform-section { position: relative; background: #050506; color: #f5f5f7; }
.platform-section::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 76% 18%, rgba(var(--product-accent-rgb), .2), transparent 30%);
  pointer-events: none;
}
.platform-section .product-shell { position: relative; z-index: 1; }
.platform-section .section-heading h2 { color: #f5f5f7; }
.platform-section .section-heading > p:last-child { color: #a1a1a6; }
.platform-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 14px; }
.platform-card {
  min-height: 290px;
  padding: 28px;
  display: flex;
  flex-direction: column;
  border: 1px solid rgba(255,255,255,.13);
  border-radius: 28px;
  background: linear-gradient(155deg, rgba(255,255,255,.1), rgba(255,255,255,.035));
  box-shadow: inset 0 1px 0 rgba(255,255,255,.09);
  transition: transform .4s cubic-bezier(.2,.8,.2,1), border-color .3s ease, background .3s ease;
}
.platform-card:hover { transform: translateY(-6px); border-color: rgba(var(--product-accent-rgb), .5); background: linear-gradient(155deg, rgba(var(--product-accent-rgb), .16), rgba(255,255,255,.045)); }
.platform-card-top { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.platform-os { color: #fff; font-size: 18px; font-weight: 720; letter-spacing: -.03em; }
.platform-badge { padding: 6px 9px; border: 1px solid rgba(var(--product-accent-rgb), .34); border-radius: 999px; color: var(--product-accent-2); font-size: 10px; font-weight: 750; letter-spacing: .08em; }
.platform-card h3 { margin: auto 0 12px; color: #fff; font-size: 25px; letter-spacing: -.045em; }
.platform-card p { margin: 0; color: #a1a1a6; font-size: 14px; line-height: 1.65; }
.platform-note { margin: 22px 0 0; padding: 18px 22px; border: 1px solid rgba(255,255,255,.12); border-radius: 18px; color: #c7c7cc; background: rgba(255,255,255,.055); font-size: 15px; line-height: 1.6; }

.feature-section { background: var(--soft-2); }
.feature-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; }
.feature-card {
  position: relative;
  min-height: 275px;
  padding: 28px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 28px;
  background: var(--product-panel-solid);
  transition: transform .4s cubic-bezier(.2,.8,.2,1), border-color .3s ease, box-shadow .35s ease;
}
.feature-card::after { content: ""; position: absolute; width: 130px; height: 130px; right: -58px; bottom: -62px; border-radius: 50%; background: rgba(var(--product-accent-rgb), .09); transition: transform .45s ease; }
.feature-card:hover { transform: translateY(-6px); border-color: rgba(var(--product-accent-rgb), .3); box-shadow: 0 24px 55px rgba(0,0,0,.08); }
.feature-card:hover::after { transform: scale(1.28); }
.feature-index { display: grid; place-items: center; width: 36px; height: 36px; border-radius: 11px; background: rgba(var(--product-accent-rgb), .1); color: var(--product-accent); font-size: 12px; font-weight: 750; }
.feature-card h3 { margin: 56px 0 12px; font-size: 22px; letter-spacing: -.035em; line-height: 1.15; }
.feature-card p { margin: 0; color: var(--muted); font-size: 14px; line-height: 1.62; }

.showcase-grid { display: grid; grid-template-columns: repeat(12, 1fr); gap: 22px; }
.showcase-card {
  position: relative;
  grid-column: span 7;
  min-width: 0;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 32px;
  background: var(--soft);
}
.showcase-card:nth-child(2) { grid-column: span 5; }
.showcase-card > img { display: block; width: 100%; height: clamp(350px, 42vw, 540px); object-fit: cover; object-position: top left; transition: transform .7s cubic-bezier(.2,.8,.2,1); }
.showcase-card:hover > img { transform: scale(1.018); }
.opc-network-card { background: #171411; }
.opc-network-visual {
  position: relative;
  display: grid;
  place-items: center;
  min-height: clamp(350px, 42vw, 540px);
  overflow: hidden;
  background:
    radial-gradient(circle at 50% 44%, rgba(var(--product-accent-rgb), .28), transparent 25%),
    radial-gradient(circle at 18% 16%, rgba(255,255,255,.07), transparent 28%),
    linear-gradient(145deg, #211b17, #0f0e0c 72%);
}
.opc-network-visual::before {
  content: "";
  position: absolute;
  inset: 0;
  opacity: .22;
  background-image: linear-gradient(rgba(255,255,255,.12) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,.12) 1px, transparent 1px);
  background-size: 36px 36px;
  mask-image: radial-gradient(circle at center, #000, transparent 74%);
}
.opc-network-ring { position: absolute; left: 50%; top: 46%; border: 1px solid rgba(255,255,255,.13); border-radius: 50%; transform: translate(-50%, -50%); }
.opc-network-ring::after { content: ""; position: absolute; left: 50%; top: -4px; width: 7px; height: 7px; border-radius: 50%; background: var(--product-accent-2); box-shadow: 0 0 20px rgba(var(--product-accent-rgb), .9); }
.opc-network-ring.ring-one { width: 52%; aspect-ratio: 1; animation: opcOrbit 18s linear infinite; }
.opc-network-ring.ring-two { width: 78%; aspect-ratio: 1; border-style: dashed; animation: opcOrbitReverse 26s linear infinite; }
.opc-network-core {
  position: relative;
  z-index: 2;
  display: grid;
  justify-items: center;
  gap: 8px;
  width: min(230px, 48%);
  padding: 30px 22px;
  border: 1px solid rgba(255,255,255,.15);
  border-radius: 28px;
  background: rgba(27,22,19,.82);
  color: #fff;
  box-shadow: 0 28px 60px rgba(0,0,0,.36), inset 0 1px 0 rgba(255,255,255,.08);
  backdrop-filter: blur(20px);
}
.opc-network-core img { width: min(154px, 92%); padding: 7px 10px; border-radius: 11px; background: #f4e8e2; filter: drop-shadow(0 8px 18px rgba(0,0,0,.25)); }
.opc-network-core b { margin-top: 8px; font-size: 11px; letter-spacing: .16em; }
.opc-network-core small { color: #98918b; font-size: 11px; }
.opc-network-node {
  position: absolute;
  z-index: 2;
  padding: 9px 13px;
  border: 1px solid rgba(255,255,255,.14);
  border-radius: 999px;
  background: rgba(39,33,28,.82);
  color: #ddd8d3;
  font-size: 11px;
  font-weight: 650;
  box-shadow: 0 12px 26px rgba(0,0,0,.22);
  backdrop-filter: blur(12px);
}
.node-community { left: 8%; top: 22%; }
.node-signal { right: 7%; top: 18%; }
.node-project { left: 9%; bottom: 27%; }
.node-tool { right: 8%; bottom: 24%; }
.opc-screen-card > img { object-position: center top; }
@keyframes opcOrbit { to { transform: translate(-50%, -50%) rotate(360deg); } }
@keyframes opcOrbitReverse { to { transform: translate(-50%, -50%) rotate(-360deg); } }
.showcase-copy { position: absolute; left: 18px; right: 18px; bottom: 18px; padding: 22px 24px; border: 1px solid rgba(255,255,255,.18); border-radius: 20px; background: rgba(13,13,15,.77); color: #fff; backdrop-filter: blur(22px) saturate(150%); }
.showcase-copy span { color: var(--product-accent-2); font-size: 10px; font-weight: 750; letter-spacing: .14em; }
.showcase-copy h3 { margin: 7px 0 6px; font-size: 22px; letter-spacing: -.03em; }
.showcase-copy p { margin: 0; color: rgba(255,255,255,.7); font-size: 13px; }

.flow-section { background: #000; color: #f5f5f7; }
.flow-section .product-kicker { color: var(--product-accent-2); }
.flow-section .section-heading h2 { color: #f5f5f7; }
.flow-section .section-heading > p:last-child { color: #a1a1a6; }
.flow-line { display: grid; grid-template-columns: repeat(5, 1fr); }
.flow-step { position: relative; min-width: 0; padding: 30px 28px 30px 0; border-top: 1px solid rgba(255,255,255,.18); }
.flow-step:not(:last-child)::after { content: "→"; position: absolute; top: 26px; right: 14px; color: #636366; }
.flow-step b { display: block; margin-bottom: 64px; color: var(--product-accent-2); font-size: 11px; }
.flow-step h3 { margin: 0 0 10px; color: #fff; font-size: 19px; letter-spacing: -.03em; }
.flow-step p { margin: 0; color: #8e8e93; font-size: 13px; line-height: 1.55; }

.usecase-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
.usecase-card { min-height: 250px; padding: 34px; border: 1px solid var(--line); border-radius: 30px; background: var(--product-panel); backdrop-filter: blur(18px); }
.usecase-card span { color: var(--product-accent); font-size: 12px; font-weight: 750; letter-spacing: .08em; }
.usecase-card h3 { margin: 55px 0 12px; font-size: clamp(23px, 2.5vw, 32px); letter-spacing: -.045em; }
.usecase-card p { max-width: 480px; margin: 0; color: var(--muted); line-height: 1.65; }

.trust-panel {
  position: relative;
  overflow: hidden;
  padding: clamp(44px, 7vw, 86px);
  border-radius: 40px;
  background: linear-gradient(135deg, #111114, #25252b);
  color: #fff;
}
.trust-panel::after { content: ""; position: absolute; right: -12%; bottom: -70%; width: 600px; aspect-ratio: 1; border-radius: 50%; background: radial-gradient(circle, rgba(var(--product-accent-rgb), .38), transparent 67%); }
.trust-copy { position: relative; z-index: 1; display: grid; grid-template-columns: 1.05fr .95fr; gap: clamp(45px, 8vw, 110px); align-items: end; }
.trust-copy h2 { margin: 0; color: #fff; font-size: clamp(38px, 5vw, 68px); letter-spacing: -.055em; line-height: 1.03; }
.trust-copy > div > p { color: #a1a1a6; font-size: 18px; line-height: 1.65; }
.trust-points { display: grid; gap: 14px; margin-top: 26px; }
.trust-points div { padding: 15px 0; border-top: 1px solid rgba(255,255,255,.14); }
.trust-points b { display: block; color: #fff; font-size: 15px; }
.trust-points small { color: #8e8e93; }

.product-cta { padding-top: 50px; }
.cta-panel { position: relative; overflow: hidden; padding: clamp(64px, 9vw, 120px) 30px; border-radius: 42px; background: rgba(var(--product-accent-rgb), .09); text-align: center; }
.cta-panel::before, .cta-panel::after { content: ""; position: absolute; border-radius: 50%; background: rgba(var(--product-accent-rgb), .1); filter: blur(1px); }
.cta-panel::before { width: 280px; height: 280px; left: -120px; top: -140px; }
.cta-panel::after { width: 360px; height: 360px; right: -190px; bottom: -250px; }
.cta-panel h2 { position: relative; margin: 0; font-size: clamp(38px, 5.2vw, 72px); letter-spacing: -.055em; line-height: 1.04; }
.cta-panel > p { position: relative; max-width: 650px; margin: 22px auto 30px; color: var(--muted); font-size: 18px; }
.cta-panel .product-hero-actions { position: relative; margin-top: 0; }

.product-footer { margin-top: 120px; }
.product-footer .footer-links a:first-child { color: var(--product-accent); }

.reveal-product { opacity: 0; transform: translateY(28px); transition: opacity .75s ease var(--reveal-delay, 0ms), transform .75s cubic-bezier(.2,.8,.2,1) var(--reveal-delay, 0ms); }
.reveal-product.is-visible { opacity: 1; transform: translateY(0); }

@keyframes breathe { 0%, 100% { transform: translateX(-50%) scale(.96); opacity: .72; } 50% { transform: translateX(-50%) scale(1.06); opacity: 1; } }

@media (max-width: 1000px) {
  .fde-card { grid-column: span 6; min-height: 340px; }
  .fde-card.delivery { grid-column: 1 / -1; min-height: 300px; }
  .platform-grid { grid-template-columns: repeat(2, 1fr); }
  .feature-grid { grid-template-columns: repeat(2, 1fr); }
  .feature-card { min-height: 245px; }
  .flow-line { grid-template-columns: repeat(3, 1fr); row-gap: 22px; }
  .showcase-card, .showcase-card:nth-child(2) { grid-column: span 6; }
}

@media (max-width: 820px) {
  .product-site .product-brand-name { display: none; }
  .product-site .desktop-nav { display: none; }
  .product-site .site-header { grid-template-columns: 1fr auto auto; }
  .product-site .header-actions .header-cta { display: none; }
  .product-site .mobile-menu { display: block; }
  .product-shell { width: min(100% - 32px, 680px); }
  .product-hero { min-height: auto; padding: 90px 0 54px; }
  .product-hero h1 { font-size: clamp(46px, 11vw, 72px); }
  html[data-product="mail"] .product-hero h1 { font-size: clamp(42px, 9.5vw, 60px); }
  html[data-product="opc"] .product-hero h1 { font-size: clamp(43px, 10.5vw, 66px); }
  .product-hero-copy { margin-bottom: 42px; }
  .product-stage { width: 100%; padding: 6px; border-radius: 22px; }
  .product-stage-frame { border-radius: 16px; }
  .manifesto-grid, .trust-copy { grid-template-columns: 1fr; }
  .manifesto-copy { max-width: 590px; }
  .fde-track-heading { align-items: flex-start; flex-direction: column; }
  .fde-track-heading h3 { text-align: left; }
  .fde-track { grid-template-columns: repeat(3, 1fr); row-gap: 24px; }
  .showcase-card, .showcase-card:nth-child(2) { grid-column: 1 / -1; }
  .showcase-card > img { height: auto; aspect-ratio: 16/10; }
  .flow-line { grid-template-columns: repeat(2, 1fr); }
  .usecase-card h3 { margin-top: 38px; }
}

@media (max-width: 560px) {
  .product-site .site-header { grid-template-columns: 29px minmax(0, 1fr) 34px; padding-inline: 14px; }
  .product-site .brand { min-width: 0; }
  .product-site .brand > span:nth-child(2) { display: none; }
  .product-site .header-actions { min-width: 0; justify-self: end; }
  .product-site .header-actions { gap: 5px; }
  .product-site .preference-control { padding-inline: 7px; }
  .product-site .preference-control select { width: 30px; color: transparent; }
  .product-site .preference-control select option { color: #1d1d1f; }
  html[data-theme="dark"] .product-site .preference-control select option { color: #f5f5f7; }
  .product-hero { padding-top: 72px; }
  .product-hero h1 { font-size: clamp(42px, 13.6vw, 61px); }
  html[data-product="mail"] .product-hero h1 { font-size: clamp(36px, 10.6vw, 48px); }
  html[data-product="opc"] .product-hero h1 { font-size: clamp(38px, 11.6vw, 53px); }
  .product-hero-lead { margin-top: 22px; font-size: 17px; }
  .product-hero-actions { flex-direction: column; align-items: stretch; max-width: 320px; margin-inline: auto; }
  .hero-proof { gap: 6px; }
  .hero-proof li { padding: 7px 10px; font-size: 11px; }
  .stage-bar { height: 27px; }
  .product-section { padding: 88px 0; }
  .section-heading h2 { font-size: clamp(34px, 10.5vw, 48px); }
  .section-heading > p:last-child { margin-top: 18px; font-size: 16px; }
  .manifesto h2 { font-size: clamp(39px, 11.5vw, 54px); }
  .manifesto-stats { gap: 7px; }
  .manifesto-stats b { font-size: 18px; }
  .manifesto-stats small { font-size: 10px; }
  .fde-card, .fde-card.delivery { grid-column: 1 / -1; min-height: 300px; padding: 26px; border-radius: 25px; }
  .fde-card h3 { margin-top: 58px; }
  .fde-track-panel { padding: 26px; border-radius: 25px; }
  .fde-track { grid-template-columns: 1fr; }
  .fde-track div { padding-right: 0; }
  .fde-track div:not(:last-child)::after { display: none; }
  .fde-track b { margin-bottom: 20px; }
  .fde-track span { max-width: none; }
  .platform-grid, .feature-grid, .usecase-grid { grid-template-columns: 1fr; }
  .platform-card { min-height: 230px; padding: 24px; border-radius: 24px; }
  .platform-card h3 { margin-top: 56px; }
  .platform-note { padding: 16px 18px; font-size: 14px; }
  .feature-card { min-height: 225px; padding: 24px; border-radius: 24px; }
  .feature-card h3 { margin-top: 44px; }
  .showcase-grid { gap: 14px; }
  .showcase-card { border-radius: 24px; }
  .showcase-copy { position: static; margin: 0; border: 0; border-radius: 0; background: #151517; }
  .opc-network-visual { min-height: 380px; }
  .opc-network-core { width: 58%; padding: 26px 18px; }
  .opc-network-ring.ring-one { width: 60%; }
  .opc-network-ring.ring-two { width: 90%; }
  .flow-line { grid-template-columns: 1fr; }
  .flow-step { padding-right: 0; }
  .flow-step:not(:last-child)::after { display: none; }
  .flow-step b { margin-bottom: 30px; }
  .usecase-card { min-height: 210px; padding: 27px; border-radius: 24px; }
  .trust-panel, .cta-panel { margin-inline: -4px; border-radius: 28px; }
  .trust-panel { padding: 40px 26px; }
  .product-footer { margin-top: 90px; }
}

@media (prefers-reduced-motion: reduce) {
  .product-hero::before { animation: none; }
  .product-stage { transform: none !important; }
  .reveal-product { opacity: 1; transform: none; transition: none; }
  .fde-card, .platform-card, .feature-card, .feature-card::after, .showcase-card > img { transition: none; }
  .opc-network-ring { animation: none !important; }
}