:root {
  --blue-slate: #555b6e;
  --blue-slate-light: #73798c;
  --blue-slate-dark: #424757;
  --muted-teal: #89b0ae;
  --teal: #4f807e;
  --teal-dark: #3e6967;
  --frozen-water: #bee3db;
  --bright-snow: #faf9f9;
  --peach-fuzz: #ffd6ba;
  --white: #ffffff;
  --surface: rgba(255, 255, 255, 0.82);
  --surface-muted: rgba(190, 227, 219, 0.28);
  --border: rgba(85, 91, 110, 0.18);
  --border-strong: rgba(85, 91, 110, 0.32);
  --text-muted: rgba(85, 91, 110, 0.72);
  --text-subtle: rgba(85, 91, 110, 0.56);
  --focus: rgba(137, 176, 174, 0.45);
  --hover: rgba(190, 227, 219, 0.38);
  --shadow: 0 1px 2px rgba(85, 91, 110, 0.08), 0 12px 32px rgba(85, 91, 110, 0.12);
  --ease-standard: cubic-bezier(0.2, 0.8, 0.2, 1);
  --ease-emphasized: cubic-bezier(0.16, 1, 0.3, 1);
  color: var(--blue-slate);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans JP", "Hiragino Sans", sans-serif;
  font-synthesis: none;
}

* { box-sizing: border-box; }
html { scroll-padding-top: 88px; }
body { margin: 0; background: var(--bright-snow); color: var(--blue-slate); font-size: 15px; line-height: 1.75; }
section[id] { scroll-margin-top: 88px; }
body.menu-open { overflow: hidden; }
a { color: inherit; text-decoration: none; }
button, a { -webkit-tap-highlight-color: transparent; }
button { font: inherit; color: inherit; }
img, svg { display: block; }
h1, h2, h3, p { margin-top: 0; }
h1, h2, h3 { line-height: 1.35; letter-spacing: -0.025em; }
p { color: var(--text-muted); }
code, .mono { font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace; }
.shell { width: min(1180px, calc(100% - 48px)); margin-inline: auto; }
.section { padding: 112px 0; }
.visually-hidden { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0; }
.skip-link { position: fixed; z-index: 1000; top: 8px; left: 8px; padding: 10px 14px; border-radius: 10px; background: var(--blue-slate); color: var(--white); transform: translateY(-160%); transition: transform 180ms var(--ease-standard); }
.skip-link:focus { transform: translateY(0); }
:focus-visible { outline: 3px solid var(--focus); outline-offset: 3px; }

.site-header { position: fixed; z-index: 100; inset: 0 0 auto; border-bottom: 1px solid transparent; background: rgba(250, 249, 249, 0.86); backdrop-filter: blur(16px); transition: border-color 180ms var(--ease-standard), box-shadow 180ms var(--ease-standard); }
.site-header.is-scrolled { border-color: var(--border); box-shadow: 0 1px 10px rgba(85, 91, 110, 0.05); }
.header-inner { height: 76px; display: flex; align-items: center; justify-content: space-between; gap: 32px; }
.brand { display: inline-flex; align-items: center; gap: 11px; line-height: 1; }
.brand-mark { width: 48px; height: 48px; flex: 0 0 48px; object-fit: contain; }
.brand span { display: grid; gap: 4px; }
.brand strong { font-size: 16px; letter-spacing: 0.01em; }
.brand small { color: var(--text-subtle); font-size: 10px; letter-spacing: 0.18em; text-transform: uppercase; }
.primary-nav { display: flex; align-items: center; gap: 28px; }
.nav-external { margin-left: 4px; color: var(--teal); font-size: 11px; }
.primary-nav > a:not(.button) { position: relative; font-size: 13px; font-weight: 600; color: var(--text-muted); }
.primary-nav > a:not(.button)::after { content: ""; position: absolute; inset: auto 0 -5px; height: 1px; background: var(--teal); transform: scaleX(0); transform-origin: right; transition: transform 180ms var(--ease-standard); }
.primary-nav > a:not(.button):hover::after { transform: scaleX(1); transform-origin: left; }
.menu-button { display: none; width: 42px; height: 42px; padding: 10px; border: 1px solid var(--border); border-radius: 12px; background: var(--white); cursor: pointer; }
.menu-button > span:not(.visually-hidden) { display: block; width: 18px; height: 1.5px; margin: 4px auto; background: var(--blue-slate); transition: transform 180ms var(--ease-standard), opacity 180ms var(--ease-standard); }
.menu-button[aria-expanded="true"] > span:nth-child(2) { transform: translateY(5.5px) rotate(45deg); }
.menu-button[aria-expanded="true"] > span:nth-child(3) { opacity: 0; }
.menu-button[aria-expanded="true"] > span:nth-child(4) { transform: translateY(-5.5px) rotate(-45deg); }

.button { min-height: 44px; display: inline-flex; align-items: center; justify-content: center; gap: 14px; padding: 0 20px; border: 1px solid var(--border); border-radius: 12px; font-size: 13px; font-weight: 700; transition: color 180ms var(--ease-standard), background 180ms var(--ease-standard), border-color 180ms var(--ease-standard), transform 180ms var(--ease-standard); }
.button:hover { transform: translateY(-1px); }
.button-small { min-height: 38px; padding: 0 16px; background: var(--blue-slate); border-color: var(--blue-slate); color: var(--white); }
.button-primary { min-height: 50px; padding-inline: 24px; background: var(--blue-slate); border-color: var(--blue-slate); color: var(--white); }
.button-primary:hover, .button-small:hover { background: var(--blue-slate-light); border-color: var(--blue-slate-light); }
.button-secondary { min-height: 50px; background: rgba(255, 255, 255, 0.74); }
.button-secondary:hover { background: var(--white); border-color: var(--border-strong); }
.button-light { min-height: 50px; background: var(--bright-snow); color: var(--blue-slate); border-color: transparent; }
.button-light:hover { background: var(--white); }

.hero { min-height: 760px; padding: 148px 0 80px; display: flex; align-items: center; overflow: hidden; }
.hero-grid { display: grid; grid-template-columns: minmax(0, 1fr) minmax(440px, 1fr); align-items: center; gap: 64px; }
.eyebrow { margin-bottom: 20px; display: flex; align-items: center; gap: 10px; color: var(--teal-dark); font-size: 12px; font-weight: 700; letter-spacing: 0.12em; text-transform: uppercase; }
.eyebrow > span { width: 24px; height: 1px; background: currentColor; }
.hero h1 { margin-bottom: 24px; font-size: clamp(44px, 4vw, 58px); font-weight: 700; line-height: 1.15; letter-spacing: -0.045em; }
.heading-line { display: block; white-space: nowrap; }
.heading-phrase { display: inline-block; white-space: nowrap; }
.hero-lead { max-width: 600px; margin-bottom: 32px; font-size: 17px; line-height: 1.9; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-bottom: 28px; }
.hero-notes { display: flex; flex-wrap: wrap; gap: 22px; margin: 0; padding: 0; list-style: none; color: var(--text-muted); font-size: 12px; font-weight: 600; }
.hero-notes li { display: inline-flex; align-items: center; gap: 7px; }
.hero-notes span { color: var(--teal); }

/* An editorial illustration: soft paper shapes and slowly moving pencil loops. */
.signal-figure { position: relative; height: 520px; margin: 0; isolation: isolate; border-radius: 42% 48% 38% 44%; background: #f2f3ee; }
.signal-figure::before { content: ""; position: absolute; inset: 0; z-index: 1; border-radius: inherit; pointer-events: none; opacity: 0.24; background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 180 180' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Cpath fill='%23555b6e' opacity='.18' filter='url(%23n)' d='M0 0h180v180H0z'/%3E%3C/svg%3E"); }
.signal-art { --art-orbit-duration: 70s; width: 100%; height: 100%; overflow: visible; }
.signal-art path, .art-petals { stroke-linecap: round; stroke-linejoin: round; }
.art-shape { transform-box: fill-box; transform-origin: center; animation: shape-drift 12s ease-in-out infinite; }
.art-shape-mint { fill: var(--frozen-water); animation-duration: 14s; animation-delay: -3s; }
.art-shape-peach { fill: var(--peach-fuzz); animation-duration: 11s; animation-delay: -5s; }
.art-shape-slate { fill: #d5d8e1; animation-duration: 13s; animation-delay: -8s; }
.art-pencil { fill: none; stroke: var(--blue-slate); stroke-width: 0.8; opacity: 0.36; }
.art-bloom, .art-orbit-system { transform-origin: 280px 262px; animation: bloom-breathe 10s ease-in-out infinite; }
.art-petals { fill: none; stroke: var(--teal-dark); stroke-width: 1.4; transform-origin: 280px 262px; animation: petals-turn var(--art-orbit-duration) linear infinite; }
.art-petals-echo { stroke-width: 0.7; opacity: 0.3; animation-duration: 90s; animation-direction: reverse; }
.art-center { fill: var(--teal-dark); }
.art-center-mark { fill: var(--bright-snow); }
.art-ribbon { fill: none; stroke: var(--blue-slate); stroke-width: 1.1; transform-origin: 280px 262px; animation: ribbon-sway 16s ease-in-out infinite; }
.art-ribbon-back { opacity: 0.65; }
.art-ribbon-front { stroke: var(--teal); stroke-width: 1.3; animation-delay: -6s; }
.art-spark { fill: none; stroke: var(--teal-dark); stroke-width: 1.6; transform-box: fill-box; transform-origin: center; animation: spark-sway 8s ease-in-out infinite; }
.art-spark-two { stroke: var(--blue-slate); animation-delay: -4s; }
.art-dots { fill: var(--teal); animation: art-dot-breathe 7s ease-in-out infinite; }
.art-dash { fill: none; stroke: var(--blue-slate); stroke-width: 1.2; }
/* Shared revolution speed; independent radial/tangential drift keeps each lap different. */
.art-orbits { transform-origin: 280px 262px; animation: petals-turn var(--art-orbit-duration) linear infinite; }
.art-orbit-wander { animation: orbit-wander 19s ease-in-out infinite; }
.art-orbit-caster { animation-duration: 26s; animation-delay: -8s; }
.art-orbit-client { animation-duration: 31s; animation-delay: -17s; }
/* Cancel the orbit's orientation so the glyphs can spin at their own gentle pace. */
.art-orbit-counter-turn { transform-box: fill-box; transform-origin: center; animation: petals-turn var(--art-orbit-duration) linear infinite reverse; }
.art-icon { transform-box: fill-box; transform-origin: center; animation: petals-turn 100s linear infinite; }
.art-icon-caster { animation-duration: 115s; animation-direction: reverse; }
.art-icon-client { animation-duration: 130s; }
.art-icon-disc { fill: var(--bright-snow); stroke: var(--border-strong); stroke-width: 1; }
.art-icon-station .art-icon-disc { fill: var(--frozen-water); }
.art-icon-caster .art-icon-disc { fill: var(--peach-fuzz); }
.art-icon-glyph { fill: none; stroke: var(--blue-slate); stroke-width: 1.4; stroke-linecap: round; stroke-linejoin: round; }
.art-icon-indicator { fill: var(--blue-slate); stroke: none; }
@keyframes shape-drift { 0%, 100% { transform: translate(0, 0) rotate(-4deg); } 50% { transform: translate(8px, -12px) rotate(5deg); } }
@keyframes bloom-breathe { 0%, 100% { transform: scale(0.96) rotate(-3deg); } 50% { transform: scale(1.035) rotate(3deg); } }
@keyframes petals-turn { to { transform: rotate(360deg); } }
@keyframes ribbon-sway { 0%, 100% { transform: translateY(0) rotate(-2deg); } 50% { transform: translateY(-9px) rotate(2deg); } }
@keyframes spark-sway { 0%, 100% { transform: rotate(-8deg) scale(0.92); } 50% { transform: rotate(10deg) scale(1.08); } }
@keyframes art-dot-breathe { 0%, 100% { opacity: 0.45; } 50% { opacity: 0.9; } }
@keyframes orbit-wander {
  0%, 100% { transform: translate(-8px, 3px); }
  23% { transform: translate(13px, -10px); }
  51% { transform: translate(-3px, 12px); }
  77% { transform: translate(-15px, -6px); }
}

.trust-strip { border-block: 1px solid var(--border); background: rgba(255,255,255,0.45); }
.trust-list { min-height: 76px; display: grid; grid-template-columns: repeat(4, 1fr); align-items: center; }
.trust-list p { margin: 0; padding: 0 22px; border-right: 1px solid var(--border); color: var(--blue-slate); font-size: 12px; font-weight: 600; text-align: center; }
.trust-list p:first-child { padding-left: 0; }.trust-list p:last-child { padding-right: 0; border-right: 0; }
.trust-list .mono { margin-right: 7px; color: var(--teal); font-size: 10px; }

.section-heading { max-width: 650px; margin-bottom: 56px; }
.section-heading h2 { margin-bottom: 18px; font-size: clamp(32px, 4vw, 48px); }
.section-heading > p:last-child { margin-bottom: 0; font-size: 15px; }
.split-heading { max-width: none; display: grid; grid-template-columns: minmax(0, 1.4fr) minmax(300px, 0.6fr); align-items: end; gap: 64px; }
.split-heading > p { padding-bottom: 5px; }
.split-heading h2 { margin-bottom: 0; }
.centered-heading { max-width: 820px; margin-inline: auto; text-align: center; }
.centered-heading .eyebrow { justify-content: center; }

.feature-layout { display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr); gap: 32px; }
.feature-lead-card { min-height: 520px; padding: 148px 44px 44px; display: flex; flex-direction: column; align-items: flex-start; justify-content: flex-end; border: 1px solid var(--border); border-radius: 20px; background: var(--surface-muted); overflow: hidden; position: relative; }
.feature-lead-card::before { content: ""; position: absolute; width: 360px; height: 360px; top: -135px; right: -80px; border: 1px solid var(--muted-teal); border-radius: 50%; opacity: 0.34; box-shadow: 0 0 0 40px rgba(190,227,219,0.2), 0 0 0 80px rgba(190,227,219,0.1); }
.feature-lead-card.is-switching { animation: feature-card-in 360ms var(--ease-emphasized); }
.feature-icon { width: 48px; height: 48px; flex: 0 0 auto; padding: 12px; display: grid; place-items: center; border-radius: 14px; background: var(--surface-muted); }
.feature-icon svg { width: 100%; fill: none; stroke: var(--blue-slate); stroke-width: 1.6; stroke-linecap: round; stroke-linejoin: round; }
.feature-icon-large { position: absolute; top: 44px; left: 44px; width: 76px; height: 76px; padding: 17px; background: var(--white); box-shadow: 0 1px 0 var(--border); }
.feature-icon.warm { background: rgba(255,214,186,0.44); }
.card-kicker, .journey-title p { margin-bottom: 10px; color: var(--teal-dark); font: 10px/1.3 ui-monospace, monospace; letter-spacing: 0.12em; }
.feature-lead-card h3 { max-width: 540px; margin-bottom: 16px; font-size: 28px; }
.feature-lead-card > p:not(.card-kicker) { max-width: 530px; margin-bottom: 24px; }
.scope-list { display: flex; flex-wrap: wrap; gap: 8px; }
.scope-list span { padding: 5px 10px; border: 1px solid var(--border); border-radius: 999px; background: rgba(255,255,255,0.6); color: var(--text-muted); font-size: 11px; font-weight: 600; }
.feature-list { display: grid; gap: 16px; }
.feature-row { width: 100%; padding: 28px 56px 28px 28px; position: relative; display: flex; align-items: flex-start; gap: 20px; border: 1px solid var(--border); border-radius: 18px; background: rgba(255,255,255,0.7); text-align: left; cursor: pointer; appearance: none; transition: transform 180ms var(--ease-standard), border-color 180ms var(--ease-standard), background 180ms var(--ease-standard), box-shadow 180ms var(--ease-standard); }
.feature-row:hover { border-color: var(--border-strong); background: var(--white); box-shadow: 0 10px 26px rgba(85,91,110,0.08); transform: translateY(-2px); }
.feature-swap-icon { position: absolute; top: 20px; right: 20px; width: 25px; height: 25px; display: grid; place-items: center; border: 1px solid var(--border); border-radius: 50%; color: var(--teal); font-size: 12px; line-height: 1; transition: border-color 180ms var(--ease-standard), background 180ms var(--ease-standard); }
.feature-row:hover .feature-swap-icon { border-color: var(--muted-teal); background: var(--surface-muted); }
.feature-row.is-switching { animation: feature-card-in 300ms var(--ease-emphasized); }
.feature-row-copy { min-width: 0; }
.feature-row h3 { margin-bottom: 7px; font-size: 17px; }
.feature-row p { margin-bottom: 0; font-size: 13px; }
@keyframes feature-card-in { from { opacity: 0.42; transform: translateY(8px) scale(0.99); } to { opacity: 1; transform: none; } }

.station-discovery-section { padding-top: 0; }
.station-discovery-inner { padding: 44px; display: grid; grid-template-columns: minmax(0, 1.2fr) minmax(240px, 0.8fr); align-items: center; gap: 48px; border: 1px solid var(--border); border-radius: 20px; background: var(--surface-muted); }
.station-discovery-inner h2 { margin-bottom: 18px; font-size: clamp(28px, 3vw, 40px); }
.station-discovery-inner p:not(.eyebrow) { max-width: 600px; margin-bottom: 26px; }
.discovery-art svg { width: 100%; max-width: 360px; margin-inline: auto; }
.discovery-land { fill: rgba(255,255,255,0.65); stroke: var(--border); stroke-width: 1; }
.discovery-roads { fill: none; stroke: var(--muted-teal); stroke-width: 2; }
.discovery-ring { fill: rgba(137,176,174,0.12); stroke: var(--teal); stroke-dasharray: 4 5; }
.discovery-pin { fill: var(--teal-dark); stroke: var(--white); stroke-width: 4; }

.technology-section { background: rgba(190,227,219,0.14); border-block: 1px solid rgba(85,91,110,0.08); }
.definition-grid { display: grid; grid-template-columns: repeat(3, 1fr); margin-bottom: 52px; border-top: 1px solid var(--border); }
.definition-grid article { padding: 32px 32px 12px; border-right: 1px solid var(--border); }
.definition-grid article:first-child { padding-left: 0; }.definition-grid article:last-child { padding-right: 0; border-right: 0; }
.term-number { display: inline-block; margin-bottom: 30px; color: var(--teal); font-size: 11px; }
.definition-grid h3 { margin-bottom: 13px; font-size: 25px; }
.definition-grid p { margin-bottom: 0; font-size: 13px; }
.flow-diagram { padding: 34px 44px; display: grid; grid-template-columns: minmax(150px, max-content) minmax(120px, 1fr) minmax(280px, 360px) minmax(120px, 1fr) minmax(150px, max-content); align-items: center; border: 1px solid var(--border); border-radius: 20px; background: rgba(255,255,255,0.75); }
.flow-node { min-height: 176px; padding: 18px; display: flex; flex-direction: column; align-items: center; justify-content: center; border-radius: 16px; text-align: center; }
.flow-node:not(.emphasized) { width: max-content; min-width: 150px; justify-self: center; }
.flow-node.emphasized { background: var(--surface-muted); border: 1px solid var(--border); }
.node-label { color: var(--text-subtle); font-size: 9px; letter-spacing: 0.12em; }
.node-icon { width: 54px; height: 54px; margin: 14px 0; display: grid; place-items: center; border: 1px solid var(--border); border-radius: 50%; background: var(--white); color: var(--teal-dark); }
.node-icon svg { width: 27px; height: 27px; fill: none; stroke: currentColor; stroke-width: 1.6; stroke-linecap: round; stroke-linejoin: round; }
.node-icon svg circle[r="0.8"] { fill: currentColor; stroke: none; }
.flow-node strong { font-size: 15px; }.flow-node small { margin-top: 5px; color: var(--text-subtle); font-size: 11px; }
.flow-arrow { position: relative; width: min(100%, 120px); min-height: 40px; align-self: center; justify-self: center; display: grid; place-items: center; text-align: center; }
.flow-arrow::before { content: ""; position: absolute; top: calc(50% - 1px); left: 10px; right: 18px; height: 2px; border-radius: 2px; background: linear-gradient(90deg, rgba(137,176,174,0.28), var(--muted-teal) 35%, var(--teal)); }
.flow-arrow::after { content: ""; position: absolute; top: calc(50% - 5px); right: 10px; width: 8px; height: 8px; border-top: 2px solid var(--teal); border-right: 2px solid var(--teal); transform: rotate(45deg); }
.flow-arrow > span { position: relative; z-index: 3; padding: 4px 9px; border: 1px solid rgba(137,176,174,0.2); border-radius: 99px; background: var(--bright-snow); box-shadow: 0 3px 10px rgba(85,91,110,0.07); color: var(--teal-dark); font: 9px/1.4 ui-monospace, monospace; letter-spacing: 0.04em; }
.data-packets { position: absolute; z-index: 2; top: calc(50% - 3px); left: 10px; right: 20px; height: 6px; pointer-events: none; }
.data-packets b { position: absolute; top: 0; left: 0; width: 6px; height: 6px; border-radius: 50%; background: var(--teal); box-shadow: 0 0 0 3px rgba(137,176,174,0.15); opacity: 0; animation: data-flow 2.8s linear infinite; }
.data-packets b:nth-child(2) { animation-delay: 0.9s; }
.data-packets b:nth-child(3) { animation-delay: 1.8s; }
@keyframes data-flow { 0% { left: 0; opacity: 0; } 12%, 82% { opacity: 1; } 100% { left: calc(100% - 6px); opacity: 0; } }
.accuracy-note { margin: 16px 0 0; display: flex; align-items: center; justify-content: center; gap: 9px; color: var(--text-subtle); font-size: 11px; text-align: center; }
.accuracy-note span { width: 20px; height: 20px; display: inline-grid; place-items: center; border: 1px solid var(--border); border-radius: 50%; font-family: serif; }
.accuracy-note strong { color: inherit; font-size: inherit; font-weight: 700; }

.journey-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.journey { padding: 38px; border: 1px solid var(--border); border-radius: 20px; background: rgba(255,255,255,0.68); }
.journey-client { background: var(--surface-muted); }
.journey-title { margin-bottom: 30px; padding-bottom: 28px; display: flex; align-items: center; gap: 16px; border-bottom: 1px solid var(--border); }
.journey-title > span { width: 44px; height: 44px; display: grid; place-items: center; border-radius: 13px; background: var(--blue-slate); color: var(--white); font: 15px/1 ui-monospace, monospace; }
.journey-client .journey-title > span { background: var(--teal); }
.journey-title p { margin-bottom: 5px; }.journey-title h3 { margin-bottom: 0; font-size: 20px; }
.journey ol { display: grid; gap: 22px; margin: 0; padding: 0; list-style: none; }
.journey li { display: grid; grid-template-columns: 36px 1fr; gap: 10px; }
.journey li > span { color: var(--teal); font: 10px/1.8 ui-monospace, monospace; }
.journey li strong { display: block; margin-bottom: 3px; font-size: 14px; }
.journey li p { margin: 0; font-size: 12px; }
.journey-login { display: flex; align-items: center; flex-wrap: wrap; gap: 7px; }
.journey-login .button-step { min-height: 30px; padding: 0 10px; gap: 6px; border-color: var(--blue-slate); border-radius: 8px; background: var(--blue-slate); color: var(--white); font-size: 10px; line-height: 1; }
.journey-login .button-step:hover { border-color: var(--blue-slate-light); background: var(--blue-slate-light); }
.journey-login > span { color: var(--text-muted); }
.journey code, .faq-list code { padding: 2px 5px; border: 1px solid var(--border); border-radius: 5px; background: rgba(255,255,255,0.6); color: var(--blue-slate); font-size: 0.9em; }

.notification-section { padding-top: 24px; }
.notification-panel { min-height: 390px; padding: 64px 80px; display: grid; grid-template-columns: minmax(300px, 0.75fr) minmax(0, 1.25fr); align-items: center; gap: 84px; overflow: hidden; border-radius: 24px; background: var(--blue-slate-dark); color: var(--bright-snow); }
.notification-panel h2 { margin-bottom: 18px; font-size: clamp(30px, 3.5vw, 42px); }
.notification-panel p, .notification-panel li { color: rgba(250,249,249,0.74); }
.light-eyebrow { color: var(--frozen-water); }
.notification-panel ul { display: grid; gap: 7px; margin: 22px 0 0; padding: 0; list-style: none; font-size: 12px; }
.notification-panel li { display: flex; align-items: center; gap: 9px; }.notification-panel li span { color: var(--frozen-water); }
.mail-visual { position: relative; height: 250px; }
.mail-card { position: absolute; width: 240px; height: 160px; border-radius: 18px; }
.mail-card.back { top: 28px; left: 32px; border: 1px solid rgba(250,249,249,0.2); background: rgba(190,227,219,0.12); transform: rotate(-9deg); }
.mail-card.front { top: 55px; left: 72px; padding: 31px; border: 1px solid rgba(250,249,249,0.26); background: rgba(250,249,249,0.11); box-shadow: 0 22px 50px rgba(0,0,0,0.14); transform: rotate(4deg); backdrop-filter: blur(8px); }
.mail-card.front span { width: 40px; height: 40px; margin-bottom: 20px; display: grid; place-items: center; border-radius: 50%; background: var(--peach-fuzz); color: var(--blue-slate); font-size: 21px; font-weight: 700; }
.mail-card.front i { display: block; width: 100%; height: 5px; margin-top: 8px; border-radius: 5px; background: rgba(250,249,249,0.26); }.mail-card.front i:nth-of-type(2) { width: 82%; }.mail-card.front i:nth-of-type(3) { width: 54%; }

.security-section { padding-top: 70px; }
.security-grid { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 72px; align-items: start; }
.security-grid .section-heading h2 { font-size: clamp(32px, 3.2vw, 40px); }
.security-list { margin: 0; padding: 0; list-style: none; border-top: 1px solid var(--border); }
.security-list li { padding: 23px 0; display: grid; grid-template-columns: 48px 1fr; border-bottom: 1px solid var(--border); }
.security-list li > span { color: var(--teal); font: 10px/2.1 ui-monospace, monospace; }
.security-list strong { font-size: 14px; }.security-list p { margin: 3px 0 0; font-size: 12px; }

.faq-section { background: rgba(255,255,255,0.46); border-top: 1px solid var(--border); }
.faq-grid { display: grid; grid-template-columns: minmax(260px, 0.65fr) minmax(0, 1.35fr); gap: 96px; }
.faq-list { border-top: 1px solid var(--border); }
.faq-list details { border-bottom: 1px solid var(--border); }
.faq-list summary { min-height: 76px; display: flex; align-items: center; justify-content: space-between; gap: 24px; cursor: pointer; font-size: 14px; font-weight: 600; list-style: none; }
.faq-list summary::-webkit-details-marker { display: none; }
.faq-question { min-width: 0; display: inline-flex; align-items: center; flex-wrap: wrap; gap: 0; }
.faq-toggle { flex: 0 0 auto; font-size: 20px; font-weight: 400; transition: transform 180ms var(--ease-standard); }
.faq-list details[open] .faq-toggle { transform: rotate(45deg); }
.faq-list details p { margin: -4px 40px 24px 0; font-size: 13px; }

.final-cta { padding: 82px 0; background: var(--teal-dark); color: var(--bright-snow); }
.final-cta-inner { display: flex; align-items: center; justify-content: space-between; gap: 48px; }
.final-cta h2 { margin-bottom: 9px; font-size: clamp(30px, 4vw, 44px); }.final-cta p { margin-bottom: 0; color: rgba(250,249,249,0.72); }
.final-cta .eyebrow { margin-bottom: 14px; }

.site-footer { padding: 70px 0 26px; background: var(--bright-snow); }
.learning-discovery-section { padding-top: 0; padding-bottom: 24px; }
.learning-discovery-inner { padding: 48px; display: grid; grid-template-columns: minmax(0, 1.5fr) minmax(0, 0.7fr); gap: 56px; align-items: center; border: 1px solid var(--border); border-radius: 24px; background: var(--surface-muted); }
.learning-discovery-inner h2 { font-size: clamp(26px, 3vw, 36px); }
.learning-discovery-inner p:not(.eyebrow) { max-width: 620px; margin-bottom: 26px; }
.learning-preview { display: grid; gap: 8px; border-left: 1px solid var(--border-strong); padding-left: 32px; }
.learning-preview .mono { color: var(--teal-dark); font-size: 11px; }
.learning-preview strong { font-size: 17px; }
.learning-preview strong + .mono { margin-top: 24px; }
.footer-main { display: grid; grid-template-columns: 1fr auto; gap: 90px; padding-bottom: 54px; }
.footer-brand > p { max-width: 390px; margin: 22px 0 0; font-size: 12px; }
.footer-links { display: flex; gap: 90px; }
.footer-links > div { min-width: 120px; display: grid; gap: 9px; align-content: start; }
.footer-links strong { margin-bottom: 7px; font-size: 12px; }.footer-links a { color: var(--text-muted); font-size: 12px; }.footer-links a:hover { color: var(--teal-dark); }
.footer-bottom { padding-top: 22px; display: flex; align-items: center; justify-content: space-between; gap: 30px; border-top: 1px solid var(--border); }
.footer-bottom p { margin: 0; color: var(--text-subtle); font-size: 10px; }
.language-control { display: inline-flex; flex-shrink: 0; margin-left: auto; }
.language-control select { min-width: 136px; min-height: 44px; padding: 0 12px; border: 1px solid var(--border); border-radius: 10px; background: var(--white); color: var(--blue-slate); font: inherit; font-size: 13px; cursor: pointer; }
.language-entry { min-height: 100vh; display: grid; place-items: center; }
.language-entry main { padding: 28px; text-align: center; }
.language-entry img { margin: 0 auto 20px; }
.language-entry nav { display: flex; justify-content: center; flex-wrap: wrap; gap: 12px; }
html[lang="en"] .heading-line, html[lang="en"] .heading-phrase { white-space: normal; }
html[lang="en"] .hero h1 { font-size: clamp(34px, 3.5vw, 50px); }
html[lang="en"] .feature-row h3 { overflow-wrap: anywhere; }

@media (max-width: 1100px) {
  .menu-button { display: block; }
  .primary-nav { position: fixed; inset: 76px 0 auto; max-height: calc(100dvh - 76px); overflow-y: auto; padding: 22px 16px 28px; display: grid; gap: 4px; border-bottom: 1px solid var(--border); background: rgba(250,249,249,0.98); box-shadow: var(--shadow); transform: translateY(-120%); opacity: 0; visibility: hidden; transition: transform 260ms var(--ease-emphasized), opacity 180ms var(--ease-standard), visibility 180ms; }
  .primary-nav.is-open { transform: translateY(0); opacity: 1; visibility: visible; }
  .primary-nav > a:not(.button) { padding: 11px 12px; border-radius: 10px; font-size: 14px; }
  .primary-nav > a:not(.button):hover { background: var(--hover); }
  .primary-nav > a:not(.button)::after { display: none; }
  .primary-nav .button { margin-top: 10px; }
}

@media (max-width: 980px) {
  .hero { min-height: auto; padding-top: 136px; }
  .hero-grid { grid-template-columns: 1fr; gap: 54px; }.hero-copy { max-width: 700px; }.signal-figure { width: min(100%, 620px); height: 480px; justify-self: center; }
  .trust-list { grid-template-columns: 1fr 1fr; padding-block: 10px; }
  .trust-list p { min-height: 68px; padding: 12px 16px; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 6px; border-right: 0; }
  .trust-list p:first-child, .trust-list p:last-child { padding-inline: 16px; }
  .trust-list .mono { margin-right: 0; line-height: 1.4; }
  .trust-list p:nth-child(odd) { border-right: 1px solid var(--border); }
  .flow-diagram { padding-inline: 20px; grid-template-columns: 1fr 80px 1fr 80px 1fr; }
  .notification-panel { padding-inline: 45px; grid-template-columns: minmax(270px, 0.75fr) minmax(0, 1.25fr); gap: 48px; }.mail-card.front { left: 45px; }.mail-card.back { left: 12px; }
  .security-grid, .faq-grid { gap: 56px; }
}

@media (max-width: 760px) {
  .shell { width: min(100% - 32px, 620px); }
  .section { padding: 82px 0; }
  .learning-discovery-section { padding-top: 0; padding-bottom: 0; }
  .learning-discovery-inner { padding: 28px; grid-template-columns: 1fr; gap: 28px; }
  .learning-preview { border-left: 0; border-top: 1px solid var(--border); padding: 24px 0 0; }
  .station-discovery-section { padding-top: 0; }
  .station-discovery-inner { padding: 28px; grid-template-columns: 1fr; gap: 24px; }
  .discovery-art { max-width: 260px; justify-self: center; }
  .header-inner { height: 68px; }
  .menu-button { display: block; }
  .primary-nav { position: fixed; inset: 68px 0 auto; max-height: calc(100vh - 68px); padding: 22px 16px 28px; display: grid; gap: 4px; border-bottom: 1px solid var(--border); background: rgba(250,249,249,0.98); box-shadow: var(--shadow); transform: translateY(-120%); opacity: 0; visibility: hidden; transition: transform 260ms var(--ease-emphasized), opacity 180ms var(--ease-standard), visibility 180ms; }
  .primary-nav.is-open { transform: translateY(0); opacity: 1; visibility: visible; }
  .primary-nav > a:not(.button) { padding: 11px 12px; border-radius: 10px; font-size: 14px; }.primary-nav > a:not(.button):hover { background: var(--hover); }.primary-nav > a:not(.button)::after { display: none; }
  .primary-nav .button { margin-top: 10px; }
  html[lang="en"] .primary-nav { inset-block-start: 68px; max-height: calc(100dvh - 68px); }
  .hero { padding: 118px 0 64px; }
  .hero h1 { font-size: clamp(38px, 10vw, 50px); }.hero-lead { font-size: 15px; }.hero-grid { gap: 42px; }
  .signal-figure { height: auto; aspect-ratio: 560 / 520; }
  .trust-list { grid-template-columns: 1fr; padding-block: 12px; }.trust-list p, .trust-list p:nth-child(odd) { border: 0; border-bottom: 1px solid var(--border); }.trust-list p:last-child { border-bottom: 0; }
  .split-heading, .feature-layout, .journey-grid, .security-grid, .faq-grid { grid-template-columns: 1fr; gap: 38px; }
  .split-heading { align-items: start; }.section-heading { margin-bottom: 40px; }.split-heading > p { max-width: 580px; }
  .feature-lead-card { min-height: 470px; padding: 130px 30px 30px; }.feature-icon-large { top: 30px; left: 30px; }.feature-lead-card h3 { font-size: 26px; }
  .definition-grid { grid-template-columns: 1fr; }.definition-grid article, .definition-grid article:first-child, .definition-grid article:last-child { padding: 26px 0; border-right: 0; border-bottom: 1px solid var(--border); }.definition-grid article:last-child { border-bottom: 0; }.term-number { margin-bottom: 15px; }
  .flow-diagram { grid-template-columns: 1fr; gap: 0; padding: 24px; }.flow-node { min-height: 150px; }.flow-arrow { height: 70px; }.flow-arrow::before { top: 5px; bottom: 10px; left: calc(50% - 1px); right: auto; width: 2px; height: auto; background: linear-gradient(180deg, rgba(137,176,174,0.28), var(--muted-teal) 35%, var(--teal)); }.flow-arrow::after { top: auto; right: auto; bottom: 6px; left: calc(50% - 5px); transform: rotate(135deg); }.flow-arrow > span { padding-block: 5px; }.data-packets { top: 5px; bottom: 12px; left: calc(50% - 3px); right: auto; width: 6px; height: auto; }.data-packets b { top: 0; left: 0; animation-name: data-flow-vertical; }
  @keyframes data-flow-vertical { 0% { top: 0; opacity: 0; } 12%, 82% { opacity: 1; } 100% { top: calc(100% - 6px); opacity: 0; } }
  .notification-section { padding-top: 10px; }.notification-panel { width: 100%; padding: 50px 28px; grid-template-columns: 1fr; border-radius: 0; gap: 30px; }.mail-visual { width: min(100%, 330px); margin-inline: auto; }
  .security-section { padding-top: 70px; }.security-grid .section-heading, .faq-grid .section-heading { margin-bottom: 0; }
  .final-cta-inner { align-items: flex-start; flex-direction: column; }
  .footer-main { grid-template-columns: 1fr; gap: 45px; }.footer-links { gap: 48px; }.footer-bottom { gap: 12px; }
}

@media (max-width: 430px) {
  .shell { width: calc(100% - 28px); }
  .brand-mark { width: 42px; height: 42px; flex-basis: 42px; }
  .hero h1 { font-size: clamp(32px, 10vw, 40px); }
  .heading-phrase { white-space: normal; }
  .hero-actions .button { width: 100%; }.hero-notes { gap: 10px 15px; }
  .feature-lead-card { min-height: 520px; }.feature-row { padding: 23px 50px 23px 19px; gap: 14px; }.feature-swap-icon { top: 17px; right: 15px; }.feature-icon { width: 42px; height: 42px; padding: 10px; }
  .journey { padding: 27px 22px; }.journey-title { align-items: flex-start; }.notification-panel { padding-inline: 21px; }.mail-card { width: 205px; }.mail-card.front { left: 58px; }.mail-card.back { left: 27px; }
  .footer-links { flex-direction: column; gap: 30px; }
}

@media (prefers-reduced-motion: reduce) {
  .signal-art * { animation: none !important; }
  *, *::before, *::after { scroll-behavior: auto !important; animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; transition-duration: 0.01ms !important; }
}