:root {
    --font-sans: "Montserrat", ui-sans-serif, system-ui, -apple-system, "Segoe UI", Arial, sans-serif;
    --font-mono: ui-monospace, SFMono-Regular, Consolas, "Liberation Mono", monospace;
    --fs-1: .6875rem;
    --fs-2: .75rem;
    --fs-3: .875rem;
    --fs-4: 1rem;
    --fs-5: 1.375rem;
    --fs-6: clamp(1.75rem, .875rem + 2.4vw, 2.1875rem);
    --fs-7: clamp(2.375rem, 1rem + 5.5vw, 3.75rem);
    --lh-display: 1.02;
    --lh-heading: 1.22;
    --lh-snug: 1.45;
    --lh-base: 1.62;
}

:root {
    --bg: #020813;
    --bg2: #061423;
    --panel: #071a2d;
    --panel2: #0a2239;
    --line: #174966;
    --text: #eef8ff;
    --muted: #9cb4c7;
    --cyan: #43d8f5;
    --teal: #43dfc3;
    --blue: #6b8fff;
    --violet: #9b8cff;
    --amber: #ffc45f;
    --green: #58dc94;
    --red: #ff7188;
    --max: 1420px;
    --radius: 16px;
    --shadow: 0 28px 90px rgba(0, 0, 0, .36)
}

* {
    box-sizing: border-box
}

html {
    scroll-behavior: smooth
}

body {
    margin: 0;
    overflow-x: hidden;
    background: radial-gradient(circle at 80% 0, rgba(45, 130, 180, .18), transparent 32%), linear-gradient(180deg, #020813, #04111f 46%, #020813);
    color: var(--text);
    font-family: var(--font-sans);
    font-size: var(--fs-4);
    line-height: var(--lh-base);
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility
}

button,
input,
select,
textarea {
    font-family: inherit;
    font-size: inherit;
    line-height: inherit
}

body:before {
    content: "";
    position: fixed;
    inset: 0;
    pointer-events: none;
    background-image: linear-gradient(rgba(70, 170, 220, .04) 1px, transparent 1px), linear-gradient(90deg, rgba(70, 170, 220, .04) 1px, transparent 1px);
    background-size: 72px 72px;
    mask-image: linear-gradient(to bottom, black, transparent 82%)
}

a {
    color: inherit;
    text-decoration: none
}

img,
svg {
    max-width: 100%;
    height: auto
}

.container {
    width: min(calc(100% - 40px), var(--max));
    margin-inline: auto
}

.skip {
    position: absolute;
    left: -999px;
    top: 10px;
    background: #fff;
    color: #000;
    padding: 10px;
    z-index: 999
}

.skip:focus {
    left: 10px
}

.legal-note {
    background: #16253a;
    border-bottom: 1px solid #7a5c28;
    color: #e8d6b0;
    font-size: var(--fs-2)
}

.legal-note .container {
    padding: 8px 0;
    display: flex;
    justify-content: space-between
}

.trustbar {
    background: rgba(2, 8, 19, .94);
    border-bottom: 1px solid rgba(75, 160, 210, .15)
}

.trustbar .container {
    min-height: 36px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    color: #93adbf;
    font-size: var(--fs-2)
}

.trustbar-links {
    display: flex;
    gap: 20px
}

.trustbar a:hover {
    color: var(--cyan)
}

.header {
    position: sticky;
    top: 0;
    z-index: 80;
    background: rgba(2, 8, 19, .91);
    backdrop-filter: blur(18px);
    border-bottom: 1px solid rgba(75, 160, 210, .18)
}

.nav {
    min-height: 80px;
    display: grid;
    grid-template-columns: 250px 1fr auto;
    gap: 18px;
    align-items: center
}

.brand {
    display: flex;
    align-items: center;
    gap: 12px;
    min-width: 0
}

.brand img {
    width: 132px
}

.brand-copy {
    display: grid;
    line-height: 1.05
}

.brand-copy b {
    letter-spacing: .09em;
    font-size: var(--fs-4)
}

.brand-copy small {
    color: var(--muted);
    font-size: var(--fs-2);
    margin-top: 5px
}

.navlinks {
    display: flex;
    justify-content: center;
    gap: 2px
}

.navbutton {
    border: 0;
    background: transparent;
    color: #c5d5e1;
    min-height: 46px;
    padding: 0 12px;
    border-radius: 10px;
    font-size: var(--fs-3);
    font-weight: 800;
    cursor: pointer
}

.navbutton:hover,
.navbutton[aria-expanded=true] {
    background: #0a2339;
    color: #fff
}

.actions {
    display: flex;
    align-items: center;
    gap: 8px
}

.lang {
    display: flex;
    border: 1px solid #1d4a68;
    border-radius: 11px;
    padding: 3px
}

.lang a {
    padding: 7px 9px;
    border-radius: 8px;
    font-weight: 900;
    font-size: var(--fs-2)
}

.lang a.active {
    background: linear-gradient(135deg, var(--cyan), var(--teal));
    color: #02121b
}

.button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 44px;
    padding: 0 17px;
    border-radius: 11px;
    border: 1px solid #235c7b;
    font-weight: 850;
    gap: 8px
}

.button.primary {
    border: 0;
    background: linear-gradient(135deg, var(--cyan), var(--teal));
    color: #02121b
}

.button.secondary {
    background: #071a2c
}

.button.ghost {
    background: transparent
}

.button:hover {
    transform: translateY(-1px);
    box-shadow: 0 12px 30px rgba(67, 216, 245, .1)
}

.mobile-toggle {
    display: none;
    width: 44px;
    height: 44px;
    border-radius: 10px;
    background: #071a2c;
    border: 1px solid #235c7b;
    color: #fff
}

.mega {
    display: none;
    position: fixed;
    top: 117px;
    left: 50%;
    transform: translateX(-50%);
    width: min(calc(100vw - 44px), 1320px);
    background: rgba(4, 18, 32, .99);
    border: 1px solid #235b78;
    border-radius: 18px;
    box-shadow: var(--shadow);
    padding: 18px
}

.mega.open {
    display: grid;
    grid-template-columns: 260px 1fr;
    gap: 18px
}

.mega-intro {
    padding: 20px;
    border-right: 1px solid #173c56
}

.mega-intro span,
.eyebrow {
    color: var(--cyan);
    font-weight: 900;
    letter-spacing: .15em;
    font-size: var(--fs-2)
}

.mega-intro h3 {
    font-size: var(--fs-5);
    line-height: var(--lh-heading);
    margin: 8px 0
}

.mega-intro p {
    color: var(--muted);
    font-size: var(--fs-2)
}

.mega-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 10px
}

.mega-tile {
    display: flex;
    gap: 12px;
    padding: 16px;
    border: 1px solid #163f5a;
    border-radius: 12px;
    background: linear-gradient(145deg, #09243c, #06192b)
}

.mega-tile:hover {
    border-color: #3a96bd;
    background: #0b2a45
}

.mega-icon,
.icon {
    width: 40px;
    height: 40px;
    display: grid;
    place-items: center;
    color: var(--cyan);
    flex: 0 0 auto
}

.mega-icon svg,
.icon svg {
    fill: none;
    stroke: currentColor;
    stroke-width: 1.8
}

.mega-tile b {
    display: block;
    font-size: var(--fs-3)
}

.mega-tile small {
    display: block;
    color: var(--muted);
    font-size: var(--fs-2);
    line-height: var(--lh-snug);
    margin-top: 4px
}

.mobile-drawer {
    display: none
}

.hero {
    padding: 82px 0 62px
}

.hero-grid {
    display: grid;
    grid-template-columns: minmax(0, .92fr) minmax(560px, 1.08fr);
    gap: 64px;
    align-items: center
}

.hero h1 {
    font-size: 60px;
    line-height: var(--lh-display);
    letter-spacing: -.055em;
    margin: 18px 0 24px;
    max-width: 12ch;
    text-wrap: balance
}

.hero h1 em {
    font-style: normal;
    color: var(--cyan)
}

.hero p {
    color: #b4c9d8;
    font-size: 20px;
    max-width: 60ch
}

/* Hero đơn (không hero-grid): h1/p kéo full chiều ngang container */
.hero > .container > h1,
.hero > .container > p {
    max-width: none;
    width: 100%
}

.hero-cta {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin: 30px 0
}

.trust-chips {
    display: flex;
    flex-wrap: wrap;
    gap: 8px
}

.chip {
    border: 1px solid #1e4f6e;
    background: #071b2e;
    border-radius: 999px;
    padding: 7px 11px;
    font-size: var(--fs-2);
    color: #bdd0dc
}

.chip strong {
    color: #fff
}

.protocol-visual {
    position: relative;
    border: 1px solid #205b7c;
    border-radius: 24px;
    padding: 24px;
    background: linear-gradient(160deg, rgba(10, 43, 72, .94), rgba(3, 15, 28, .98));
    box-shadow: var(--shadow);
    overflow: hidden
}

.protocol-visual:before {
    content: "";
    position: absolute;
    inset: -30%;
    background: radial-gradient(circle, rgba(67, 216, 245, .16), transparent 44%)
}

.visual-head {
    position: relative;
    display: flex;
    justify-content: space-between;
    gap: 12px;
    align-items: center;
    margin-bottom: 18px
}

.demo-badge {
    font-size: var(--fs-1);
    border: 1px solid rgba(255, 196, 95, .45);
    color: var(--amber);
    padding: 5px 8px;
    border-radius: 999px;
    background: rgba(255, 196, 95, .07)
}

.protocol-flow {
    position: relative;
    display: grid;
    grid-template-columns: 1fr 1.15fr 1fr;
    gap: 12px;
    align-items: stretch
}

.protocol-flow:before {
    content: "";
    position: absolute;
    left: 15%;
    right: 15%;
    top: 50%;
    height: 2px;
    background: linear-gradient(90deg, var(--blue), var(--cyan), var(--teal))
}

.protocol-node {
    position: relative;
    z-index: 2;
    border: 1px solid #1b4b68;
    border-radius: 14px;
    background: #06192b;
    padding: 16px;
    min-height: 150px
}

.protocol-node.core {
    border-color: #328fb7;
    background: linear-gradient(180deg, #0b3151, #071a2d);
    box-shadow: 0 0 50px rgba(67, 216, 245, .12)
}

.protocol-node h3 {
    font-size: var(--fs-4);
    line-height: var(--lh-heading);
    margin: 8px 0
}

.protocol-node p {
    font-size: var(--fs-3);
    line-height: var(--lh-snug);
    color: var(--muted);
    margin: 0
}

.core-tags {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 7px;
    margin-top: 12px
}

.core-tags span {
    font-size: var(--fs-2);
    padding: 6px 7px;
    border-radius: 8px;
    border: 1px solid #1c4b68;
    background: #071c30;
    color: #c7d9e4;
    align-items: center;
    text-align: center;
}

.telemetry {
    position: relative;
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 8px;
    margin-top: 14px
}

.telemetry div {
    border: 1px solid #1a4864;
    border-radius: 10px;
    background: #06192b;
    padding: 10px
}

.telemetry small {
    font-size: var(--fs-1);
    letter-spacing: .1em;
    color: #7f9fb5
}

.telemetry b {
    display: block;
    font-size: var(--fs-2);
    margin-top: 3px
}

.pending {
    color: var(--amber)
}

.section {
    padding: 78px 0
}

.section.alt {
    background: linear-gradient(180deg, rgba(7, 29, 49, .46), rgba(3, 14, 26, .15));
    border-block: 1px solid rgba(62, 137, 183, .13)
}

.section-head {
    display: grid;
    grid-template-columns: 1fr;
    gap: 14px;
    align-items: start;
    margin-bottom: 34px
}

.section-head > div {
    width: 100%;
    max-width: none
}

.section-head h2 {
    font-size: var(--fs-6);
    line-height: var(--lh-display);
    letter-spacing: -.045em;
    margin: 8px 0 0;
    width: 100%;
    max-width: none;
    text-wrap: balance
}

.section-head p {
    color: var(--muted);
    margin: 0;
    width: 100%;
    max-width: none
}

.metro {
    display: grid;
    grid-template-columns: repeat(12, 1fr);
    gap: 14px
}

/* Trang chủ: 1 dòng 3 tile */
.metro.metro-stack {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 14px
}

.metro.metro-stack > .tile,
.metro.metro-stack > .tile.large,
.metro.metro-stack > .tile.medium,
.metro.metro-stack > .tile.wide,
.metro.metro-stack > .tile.small {
    grid-column: auto;
    min-height: 170px
}

/* Lưới đều 2 cột */
.metro.metro-stack-2 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px
}

.metro.metro-stack-2 > .tile,
.metro.metro-stack-2 > .tile.large,
.metro.metro-stack-2 > .tile.medium,
.metro.metro-stack-2 > .tile.wide,
.metro.metro-stack-2 > .tile.small {
    grid-column: auto;
    min-height: 170px
}

@media (max-width: 900px) {
    .metro.metro-stack,
    .metro.metro-stack-2 {
        grid-template-columns: 1fr
    }
}

.tile {
    position: relative;
    border: 1px solid #16445f;
    border-radius: var(--radius);
    background: linear-gradient(145deg, #09223a, #06182a);
    padding: 22px;
    min-height: 170px;
    overflow: hidden
}

.tile:after {
    content: "";
    position: absolute;
    width: 190px;
    height: 190px;
    border-radius: 50%;
    right: -110px;
    bottom: -120px;
    background: radial-gradient(circle, rgba(67, 216, 245, .14), transparent 66%)
}

.tile.large {
    grid-column: span 6;
    min-height: 250px
}

.tile.wide {
    grid-column: span 8
}

.tile.medium {
    grid-column: span 4
}

.tile.small {
    grid-column: span 3
}

.tile:hover {
    border-color: #3b91b5;
    transform: translateY(-2px);
    transition: .2s
}

.tile .icon {
    margin-bottom: 18px
}

.tile h3 {
    font-size: 20px;
    line-height: var(--lh-heading);
    margin: 0 0 8px
}

.tile p {
    color: var(--muted);
    font-size: 16px;
    line-height: var(--lh-snug)
}

.tile-link {
    display: inline-flex;
    margin-top: 15px;
    color: var(--cyan);
    font-weight: 850;
    font-size: var(--fs-3)
}

.tag {
    display: inline-flex;
    font-size: 14px;
    padding: 5px 8px;
    border-radius: 999px;
    border: 1px solid #1e4e6c;
    color: #bdd0dd
}

.tag.amber {
    border-color: #765a2a;
    color: var(--amber)
}

.tag.green {
    border-color: #2b6a4c;
    color: var(--green)
}

.compliance-dashboard {
    display: grid;
    grid-template-columns: 260px 1fr;
    gap: 18px
}

.filters {
    border: 1px solid #17445f;
    border-radius: 14px;
    background: #06192a;
    padding: 18px;
    align-self: start;
    position: sticky;
    top: 130px
}

.filters button {
    display: flex;
    width: 100%;
    justify-content: space-between;
    gap: 8px;
    border: 0;
    border-bottom: 1px solid #14374f;
    background: transparent;
    color: #bad0dd;
    padding: 11px 0;
    cursor: pointer
}

.filters button.active {
    color: var(--cyan)
}

.matrix {
    display: grid;
    gap: 10px
}

.matrix-row {
    display: grid;
    grid-template-columns: 110px 1.1fr 1.7fr 1.15fr 150px;
    gap: 12px;
    align-items: start;
    border: 1px solid #17445f;
    border-radius: 12px;
    background: #06192a;
    padding: 14px
}

.matrix-row.header {
    position: sticky;
    top: 0;
    z-index: 3;
    background: #09233a;
    font-size: 14px;
    letter-spacing: .08em;
    color: #90aec2
}

.matrix-row h3 {
    font-size: var(--fs-3);
    line-height: var(--lh-snug);
    margin: 0
}

.matrix-row p {
    font-size: var(--fs-3);
    line-height: var(--lh-snug);
    color: var(--muted);
    margin: 0
}

.status {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: var(--fs-1);
    padding: 5px 8px;
    border-radius: 999px;
    border: 1px solid #755b2d;
    color: var(--amber);
    white-space: nowrap
}

.status.ready {
    border-color: #2d6a4d;
    color: var(--green)
}

.status.info {
    border-color: #2b6488;
    color: var(--cyan)
}

.timeline {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 12px
}

.step {
    position: relative;
    border: 1px solid #194866;
    border-radius: 14px;
    background: #071b2f;
    padding: 20px
}

.step:not(:last-child):after {
    content: "→";
    position: absolute;
    right: -12px;
    top: 50%;
    color: var(--cyan)
}

.step b {
    display: grid;
    place-items: center;
    width: 30px;
    height: 30px;
    border-radius: 50%;
    background: #10415e;
    color: var(--cyan);
    margin-bottom: 12px
}

.step h3 {
    font-size: var(--fs-4);
    line-height: var(--lh-heading);
    margin: 0 0 6px
}

.step p {
    font-size: var(--fs-3);
    line-height: var(--lh-snug);
    color: var(--muted);
    margin: 0
}

.architecture {
    display: grid;
    grid-template-columns: 1fr 1.15fr;
    gap: 22px
}

/* Trang giấy phép: 2 cột bằng nhau, nút nằm dưới */
.licence-layout {
    display: grid;
    gap: 22px
}

.licence-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 22px;
    align-items: stretch
}

.licence-layout .data-table {
    min-width: 0
}

.licence-layout .table-wrap,
.licence-layout .licence-qr {
    min-height: 100%;
    height: 100%
}

.licence-layout .licence-qr {
    grid-column: auto;
    display: flex;
    flex-direction: column;
    align-items: start;
    justify-content: start;
    text-align: start
}

.licence-layout .licence-qr img {
    max-width: 100%;
    height: auto
}

.licence-layout .licence-qr p {
    word-break: break-all;
    overflow-wrap: anywhere
}

.licence-layout .hero-cta {
    margin: 0
}

@media (max-width: 900px) {
    .licence-grid {
        grid-template-columns: 1fr
    }
}

/* Layers trên, 3 codebox cạnh nhau bên dưới */
.architecture.architecture-stack {
    grid-template-columns: 1fr
}

.codebox-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 14px
}

@media (max-width: 900px) {
    .codebox-grid {
        grid-template-columns: 1fr
    }
}

.layers {
    display: grid;
    gap: 10px
}

.layer {
    display: grid;
    grid-template-columns: 44px 1fr auto;
    gap: 12px;
    align-items: center;
    border: 1px solid #17455f;
    border-radius: 12px;
    padding: 14px;
    background: #071a2c
}

.layer > div {
    display: flex;
    flex-direction: column;
    gap: 6px;
    min-width: 0
}

.layer small {
    color: var(--muted)
}

.layer span:last-child {
    color: var(--amber);
    font-size: var(--fs-1)
}

.codebox {
    border: 1px solid #1b4a67;
    border-radius: 14px;
    background: #03101e;
    overflow: hidden
}

.codehead {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 11px 14px;
    border-bottom: 1px solid #183b55;
    color: #91abc0;
    font-size: var(--fs-2)
}

.codehead button {
    background: #0b2b46;
    border: 1px solid #1f5878;
    color: #fff;
    border-radius: 8px;
    padding: 7px 10px
}

.codebox pre {
    margin: 0;
    padding: 20px;
    overflow: auto;
    color: #c6f7e8;
    font-family: var(--font-mono);
    font-size: var(--fs-3);
    line-height: 1.65
}

.table-wrap {
    overflow: auto;
    border: 1px solid #17455f;
    border-radius: 14px
}

.data-table {
    width: 100%;
    border-collapse: collapse;
    min-width: 820px;
    background: #06192a
}

.data-table th,
.data-table td {
    padding: 14px;
    border-bottom: 1px solid #143b55;
    text-align: left;
    vertical-align: top
}

.data-table th {
    font-size: 14px;
    letter-spacing: .09em;
    color: #8fb1c9;
    background: #092139
}

.data-table td {
    font-size: var(--fs-3);
    line-height: var(--lh-snug);
    color: #c9d8e5
}

.policy-layout {
    display: grid;
    grid-template-columns: 300px 1fr;
    gap: 28px
}

.toc {
    position: sticky;
    top: 130px;
    align-self: start;
    border: 1px solid #17445f;
    border-radius: 14px;
    background: #06192a;
    padding: 18px
}

.toc b {
    display: block;
    margin-bottom: 10px
}

.toc a {
    display: block;
    color: #9cb7ca;
    padding: 7px 0;
    border-bottom: 1px solid #12334b;
    font-size: var(--fs-3)
}

.policy-content {
    border: 1px solid #17445f;
    border-radius: 16px;
    background: #06192a;
    padding: 30px
}

.policy-content h2 {
    font-size: var(--fs-5);
    line-height: var(--lh-heading);
    font-weight: 800;
    letter-spacing: -.015em;
    margin-top: 40px;
    padding-top: 22px;
    border-top: 1px solid #14384f
}

.policy-content h2:first-child {
    margin-top: 0;
    padding-top: 0;
    border-top: 0
}

.policy-content p,
.policy-content li {
    color: #bdcfdb
}

.callout {
    border-left: 3px solid var(--amber);
    background: rgba(255, 196, 95, .07);
    padding: 16px;
    border-radius: 0 12px 12px 0;
    color: #e6d8bc
}

.callout.info {
    border-color: var(--cyan);
    background: rgba(67, 216, 245, .07)
}

.verifier {
    display: grid;
    grid-template-columns: .8fr 1.2fr;
    gap: 20px
}

.dropzone {
    border: 1px dashed #3387aa;
    border-radius: 16px;
    padding: 28px;
    background: #061a2d
}

.dropzone input,
.form input,
.form select,
.form textarea {
    width: 100%;
    background: #041322;
    border: 1px solid #1b4a66;
    border-radius: 10px;
    color: #fff;
    padding: 12px
}

/* Custom select — cùng kiểu dropdown ngôn ngữ header */
.form-select {
    position: relative;
    display: block;
    width: 100%
}

.form-select-native {
    position: absolute;
    inset: 0;
    opacity: 0;
    pointer-events: none;
    width: 100%;
    height: 100%
}

.form-select-trigger {
    width: 100%;
    box-sizing: border-box;
    display: inline-flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
    min-height: 46px;
    padding: 0 12px;
    border: 1px solid #1d4b68;
    border-radius: 10px;
    background: #03111f;
    color: #e8f4fb;
    text-align: left;
    cursor: pointer;
    font: inherit;
    font-size: 14px;
    font-weight: 800;
    line-height: 1.2;
    transition: border-color .16s ease, background .16s ease
}

.form-select-trigger:hover,
.form-select.is-open .form-select-trigger {
    border-color: #43d8f5;
    background: #071a2c
}

.form-select-trigger .form-select-value {
    flex: 1;
    min-width: 0;
    font-weight: 800;
    font-size: 13px;
    letter-spacing: .02em
}

.form-select-trigger .form-select-value.is-placeholder {
    color: #7f97a8;
    font-weight: 700
}

.form-select-trigger svg {
    width: 16px;
    height: 16px;
    flex: 0 0 auto;
    fill: currentColor;
    stroke: none;
    opacity: 1;
    transition: transform .18s
}

.form-select.is-open .form-select-trigger svg {
    transform: rotate(180deg)
}

.form-select-menu {
    position: absolute;
    top: calc(100% + 6px);
    left: 0;
    right: 0;
    z-index: 40;
    margin: 0;
    padding: 6px;
    list-style: none;
    border: 1px solid #1d4b68;
    border-radius: 10px;
    background: #03111f;
    box-shadow: 0 16px 40px rgba(0, 0, 0, .35)
}

.form-select-option {
    display: flex;
    align-items: center;
    gap: 8px;
    width: 100%;
    box-sizing: border-box;
    padding: 8px 10px;
    border: 0;
    border-radius: 8px;
    background: transparent;
    color: #e8f4fb;
    text-align: left;
    cursor: pointer;
    font: inherit;
    font-size: 13px;
    font-weight: 800
}

.form-select-option:hover,
.form-select-option.is-active {
    background: #0a2438;
    color: #43d8f5
}

.verify-steps {
    display: grid;
    gap: 8px
}

.verify-step {
    display: grid;
    grid-template-columns: 32px 1fr auto;
    gap: 10px;
    align-items: center;
    border: 1px solid #17445f;
    border-radius: 10px;
    padding: 11px;
    background: #071b2e
}

.verify-step b {
    display: grid;
    place-items: center;
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: #0e3a55;
    color: var(--cyan)
}

.verify-step span {
    font-size: var(--fs-3)
}

.verify-step em {
    font-style: normal;
    font-size: var(--fs-1);
    color: var(--amber)
}

.form-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 14px
}

.form label {
    font-size: var(--fs-2);
    color: #a8becf
}

.form .req {
    color: #ff7b72;
    font-weight: 800
}

.form .full {
    grid-column: 1/-1
}

.form-status {
    margin: 0;
    padding: 12px 14px;
    border: 0;
    font-size: var(--fs-2);
    line-height: 1.45
}

.form-status.is-error {
    background: rgba(138, 59, 59, .18);
    color: #ffc9c5
}

.form-status.is-success {
    background: rgba(31, 107, 79, .18);
    color: #b7f0d8
}

.footer {
    border-top: 1px solid #163b55;
    background: #020a14;
    padding: 48px 0 24px
}

.footer-grid {
    display: grid;
    grid-template-columns: 1.25fr repeat(4, 1fr);
    gap: 30px
}

.footer img {
    width: 145px
}

.footer p {
    color: var(--muted);
    font-size: var(--fs-3);
    line-height: var(--lh-snug)
}

.footer b {
    display: block;
    margin-bottom: 10px
}

.footer a {
    display: block;
    color: #9fb6c8;
    font-size: var(--fs-3);
    padding: 4px 0
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    border-top: 1px solid #14354c;
    margin-top: 30px;
    padding-top: 18px;
    color: #7693a8;
    font-size: var(--fs-2)
}

.language-choice {
    min-height: 100vh;
    display: grid;
    place-items: center
}

.language-card {
    width: min(720px, calc(100% - 32px));
    border: 1px solid #205173;
    border-radius: 22px;
    background: #06192b;
    padding: 42px;
    text-align: center
}

.language-card img {
    width: 170px
}

.language-card h1 {
    font-size: var(--fs-7);
    line-height: var(--lh-display)
}

.language-actions {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 14px;
    margin-top: 28px
}

.language-actions a {
    padding: 20px;
    border: 1px solid #205173;
    border-radius: 14px;
    background: #09233b
}

@media(max-width:1160px) {
    .nav {
        grid-template-columns: 210px 1fr auto
    }

    .navlinks {
        display: none
    }

    .mobile-toggle {
        display: block
    }

    .actions .button.secondary {
        display: none
    }

    .hero-grid {
        grid-template-columns: 1fr
    }

    .mega {
        display: none !important
    }

    .section-head {
        grid-template-columns: 1fr
    }

    .metro .large,
    .metro .wide {
        grid-column: span 12
    }

    .metro .medium,
    .metro .small {
        grid-column: span 6
    }

    .architecture {
        grid-template-columns: 1fr
    }

    .footer-grid {
        grid-template-columns: 1fr 1fr 1fr
    }

    .mobile-drawer {
        display: none;
        position: fixed;
        inset: 117px 0 0;
        background: #03101d;
        z-index: 70;
        padding: 22px;
        overflow: auto
    }

    .mobile-drawer.open {
        display: block
    }

    .mobile-drawer a {
        display: block;
        padding: 13px;
        border-bottom: 1px solid #153a54
    }

    .mobile-drawer b {
        display: block;
        color: var(--cyan);
        margin-top: 18px
    }

    .mobile-drawer .button {
        margin-top: 12px
    }

    .compliance-dashboard {
        grid-template-columns: 1fr
    }

    .filters {
        position: static;
        display: flex;
        flex-wrap: wrap;
        gap: 8px
    }

    .filters button {
        width: auto;
        border: 1px solid #17445f;
        border-radius: 999px;
        padding: 8px 11px
    }

    .matrix-row {
        grid-template-columns: 90px 1fr 1.5fr 1fr 130px
    }
}

@media(max-width:760px) {
    .container {
        width: min(calc(100% - 24px), var(--max))
    }

    .trustbar-links {
        display: none
    }

    .nav {
        min-height: 68px;
        grid-template-columns: 1fr auto
    }

    .brand img {
        width: 116px
    }

    .brand-copy {
        display: none
    }

    .actions .lang,
    .actions .button.primary {
        display: none
    }

    .hero {
        padding: 56px 0 42px
    }

    .protocol-flow {
        grid-template-columns: 1fr
    }

    .protocol-flow:before {
        left: 50%;
        right: auto;
        top: 12%;
        bottom: 12%;
        width: 2px;
        height: auto
    }

    .telemetry {
        grid-template-columns: 1fr 1fr
    }

    .metro .medium,
    .metro .small {
        grid-column: span 12
    }

    .timeline {
        grid-template-columns: 1fr
    }

    .step:not(:last-child):after {
        content: "↓";
        right: auto;
        left: 50%;
        top: auto;
        bottom: -18px
    }

    .policy-layout {
        grid-template-columns: 1fr
    }

    .toc {
        position: static
    }

    .verifier {
        grid-template-columns: 1fr
    }

    .form-grid {
        grid-template-columns: 1fr
    }

    .footer-grid {
        grid-template-columns: 1fr 1fr
    }

    .footer-grid>div:first-child {
        grid-column: 1/-1
    }

    .footer-bottom {
        display: grid;
        gap: 6px
    }

    .matrix-row,
    .matrix-row.header {
        grid-template-columns: 1fr;
        position: static
    }

    .matrix-row.header {
        display: none
    }

    .language-actions {
        grid-template-columns: 1fr
    }

    .language-card {
        padding: 28px
    }
}

@media(max-width:440px) {

    .telemetry,
    .footer-grid {
        grid-template-columns: 1fr
    }

    .section {
        padding: 58px 0
    }

    .tile {
        padding: 18px
    }

    .actions {
        gap: 6px
    }
}

@media(prefers-reduced-motion:reduce) {
    * {
        scroll-behavior: auto !important;
        animation: none !important;
        transition: none !important
    }
}

.hero h1,
.matrix-row,
.matrix-row * {
    overflow-wrap: anywhere;
    min-width: 0
}


/* ========================================================================== */
/* V3 Enterprise Metro Header & IA                                             */
/* ========================================================================== */
:root {
    --v3-header-h: 78px;
    --v3-legal-h: 34px;
    --v3-quick-h: 40px;
    --v3-panel: #071a2b;
    --v3-panel-hi: #0a2740;
    --v3-line: rgba(92, 181, 222, .25);
    --v3-soft: rgba(67, 216, 245, .08)
}

.v3-legal-strip {
    position: relative;
    z-index: 102;
    background: linear-gradient(90deg, rgba(255, 196, 95, .13), rgba(8, 27, 45, .97));
    border-bottom: 1px solid rgba(255, 196, 95, .28);
    color: #f4dfb3;
    font-size: var(--fs-2)
}

.v3-legal-strip .container {
    height: var(--v3-legal-h);
    display: flex;
    align-items: center;
    gap: 10px;
    min-width: 0
}

.v3-legal-icon {
    display: grid;
    place-items: center;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: rgba(255, 196, 95, .18);
    border: 1px solid rgba(255, 196, 95, .42);
    font-weight: 900;
    color: var(--amber);
    flex: 0 0 auto
}

.v3-legal-strip a {
    margin-left: auto;
    color: #fff;
    font-weight: 800;
    white-space: nowrap
}

.v3-legal-short {
    display: none;
    font-weight: 800
}

.v3-header {
    position: relative;
    z-index: 100;
    background: rgba(2, 8, 19, .96);
    backdrop-filter: blur(22px);
    border-bottom: 1px solid rgba(81, 161, 205, .2);
    box-shadow: 0 18px 50px rgba(0, 0, 0, .18)
}

.v3-header-row {
    height: var(--v3-header-h);
    display: grid;
    grid-template-columns: minmax(245px, 310px) minmax(480px, 1fr) auto;
    gap: clamp(16px, 2vw, 34px);
    align-items: center
}

.v3-brand {
    display: flex;
    align-items: center;
    min-width: 0;
    gap: 14px
}

.v3-brand img {
    width: 126px;
    flex: 0 0 auto
}

.v3-brand-divider {
    width: 1px;
    height: 38px;
    background: linear-gradient(transparent, #235b79, transparent);
    flex: 0 0 auto
}

.v3-brand-copy {
    display: flex;
    flex-direction: column;
    min-width: 0;
    line-height: 1.05
}

.v3-brand-copy strong {
    font-size: var(--fs-5);
    line-height: var(--lh-heading);
    letter-spacing: -.025em;
    white-space: nowrap
}

.v3-brand-copy small {
    margin-top: 6px;
    color: #9eb7c9;
    font-size: var(--fs-2);
    white-space: nowrap
}

.v3-nav {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 2px;
    min-width: 0
}

.v3-nav-trigger {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    min-height: 44px;
    padding: 0 11px;
    border: 0;
    border-radius: 9px;
    background: transparent;
    color: #c5d6e2;
    font-size: var(--fs-3);
    font-weight: 800;
    white-space: nowrap;
    cursor: pointer
}

.v3-nav-trigger svg {
    width: 16px;
    height: 16px;
    fill: currentColor;
    stroke: none;
    flex: 0 0 auto;
    overflow: visible;
    transition: transform .18s
}

.v3-nav-trigger:hover,
.v3-nav-trigger[aria-expanded=true] {
    background: linear-gradient(180deg, #0b2b45, #081e32);
    color: #fff
}

.v3-nav-trigger[aria-expanded=true] svg {
    transform: rotate(180deg)
}

.v3-actions {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 8px;
    white-space: nowrap
}

.v3-lang {
    display: flex;
    border: 1px solid #1d4b68;
    border-radius: 10px;
    padding: 3px;
    background: #03111f
}

.v3-lang a {
    display: grid;
    place-items: center;
    min-width: 34px;
    height: 34px;
    border-radius: 7px;
    font-weight: 900;
    font-size: var(--fs-2)
}

.v3-lang a.active {
    background: linear-gradient(135deg, var(--cyan), var(--teal));
    color: #02121b
}

.v3-primary-cta,
.v3-secondary-cta {
    font-size: var(--fs-3);
    padding-inline: 14px
}

.v3-secondary-cta {
    max-width: 190px
}

.v3-mobile-toggle {
    display: none;
    width: 44px;
    height: 44px;
    border: 1px solid #235c7b;
    border-radius: 10px;
    background: #071a2c;
    padding: 11px;
    cursor: pointer
}

.v3-mobile-toggle span {
    display: block;
    height: 2px;
    background: #d6e7f1;
    margin: 4px 0;
    border-radius: 2px
}

.v3-mega {
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    width: min(calc(100vw - 40px), 1380px);
    display: grid;
    grid-template-columns: 250px minmax(0, 1fr);
    gap: 20px;
    padding: 18px;
    border: 1px solid #235b78;
    border-radius: 0 0 18px 18px;
    background: rgba(3, 15, 27, .985);
    box-shadow: 0 35px 90px rgba(0, 0, 0, .52)
}

.v3-mega[hidden] {
    display: none
}

.v3-mega-intro {
    padding: 18px 20px;
    border-radius: 12px;
    background: linear-gradient(145deg, rgba(12, 46, 75, .88), rgba(6, 25, 43, .88));
    border: 1px solid #17435d
}

.v3-mega-intro>span {
    color: var(--cyan);
    font-size: var(--fs-1);
    letter-spacing: .14em;
    font-weight: 900;
    text-transform: uppercase
}

.v3-mega-intro h2 {
    font-size: var(--fs-5);
    line-height: var(--lh-heading);
    margin: 8px 0
}

.v3-mega-intro p {
    font-size: var(--fs-2);
    color: #9fb7c8;
    margin: 0
}

.v3-mega-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    grid-auto-flow: dense;
    gap: 10px
}

.v3-mega-tile {
    position: relative;
    display: grid;
    grid-template-columns: 40px minmax(0, 1fr);
    gap: 11px;
    min-height: 114px;
    padding: 15px;
    border: 1px solid rgba(77, 159, 199, .23);
    border-radius: 12px;
    background: linear-gradient(150deg, #09233a, #061828);
    overflow: hidden
}

.v3-mega-tile.wide {
    grid-column: span 2
}

.v3-mega-tile:after {
    content: "";
    position: absolute;
    inset: auto -55px -70px auto;
    width: 130px;
    height: 130px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(67, 216, 245, .13), transparent 68%)
}

.v3-mega-tile:hover,
.v3-mega-tile:focus-visible {
    border-color: #4ab4dd;
    background: linear-gradient(150deg, #0c2c48, #071c30);
    transform: translateY(-1px)
}

.v3-mega-icon {
    width: 40px;
    height: 40px;
    display: grid;
    place-items: center;
    color: var(--cyan)
}

.v3-mega-icon svg {
    width: 31px;
    height: 31px;
    fill: none;
    stroke: currentColor;
    stroke-width: 1.7
}

.v3-mega-tile strong {
    display: block;
    font-size: var(--fs-3);
    line-height: var(--lh-heading)
}

.v3-mega-tile small {
    display: block;
    margin-top: 5px;
    color: #94adbf;
    font-size: var(--fs-2);
    line-height: var(--lh-snug)
}

.v3-mega-tile em {
    display: inline-block;
    margin-top: 8px;
    color: var(--cyan);
    font-style: normal;
    font-size: var(--fs-1);
    font-weight: 850
}

.v3-quickbar {
    background: #04101c;
    border-bottom: 1px solid rgba(63, 139, 180, .15)
}

.v3-quickbar .container {
    height: var(--v3-quick-h);
    display: flex;
    align-items: center;
    gap: 18px;
    overflow: hidden
}

.v3-quickbar span {
    color: #6f91a8;
    font-size: var(--fs-1);
    text-transform: uppercase;
    letter-spacing: .12em;
    font-weight: 900;
    white-space: nowrap
}

.v3-quickbar a {
    font-size: var(--fs-2);
    color: #9fb8c9;
    white-space: nowrap
}

.v3-quickbar a:hover {
    color: var(--cyan)
}

.v3-mobile-drawer {
    position: fixed;
    z-index: 110;
    inset: 0;
    background: rgba(2, 10, 18, .985);
    padding: 20px;
    overflow: auto
}

.v3-mobile-drawer[hidden] {
    display: none
}

.v3-mobile-top {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 16px
}

.v3-mobile-top strong {
    font-size: var(--fs-4)
}

.v3-mobile-top button {
    width: 44px;
    height: 44px;
    border-radius: 10px;
    border: 1px solid #265a78;
    background: #071a2c;
    color: #fff;
    font-size: var(--fs-5)
}

.v3-mobile-drawer>.button {
    display: flex;
    margin-bottom: 10px
}

.v3-mobile-drawer details {
    border-bottom: 1px solid #17384f
}

.v3-mobile-drawer summary {
    padding: 15px 2px;
    cursor: pointer;
    font-weight: 850
}

.v3-mobile-drawer details a {
    display: block;
    padding: 12px;
    border: 1px solid #143b55;
    border-radius: 10px;
    margin: 8px 0;
    background: #061929
}

.v3-mobile-drawer details a small {
    display: block;
    color: #8ea8ba;
    font-size: var(--fs-2);
    margin-top: 3px
}

/* Metro refinements */
.tile {
    border-color: rgba(74, 155, 196, .24);
    border-radius: 12px;
    background: linear-gradient(145deg, #092139, #061727);
    box-shadow: 0 14px 34px rgba(0, 0, 0, .12)
}

.tile.large {
    background: linear-gradient(145deg, #0a2b47, #07192c)
}

.tile.medium:nth-child(3n+1) {
    background: linear-gradient(145deg, #0b263d, #081a2b)
}

.tile h3 {
    letter-spacing: -.02em
}

.section-head h2 {
    max-width: none
}

.matrix {
    min-width: 0
}

.qcvn-v3-summary {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 12px;
    margin: 18px 0 24px
}

.qcvn-v3-summary article {
    border: 1px solid #17445f;
    border-radius: 12px;
    background: #06192a;
    padding: 16px
}

.qcvn-v3-summary small {
    display: block;
    color: #89a7ba;
    font-size: var(--fs-1);
    text-transform: uppercase;
    letter-spacing: .1em
}

.qcvn-v3-summary strong {
    display: block;
    font-size: var(--fs-5);
    line-height: var(--lh-heading);
    margin-top: 3px
}

.qcvn-v3-summary p {
    color: #93adbf;
    font-size: var(--fs-2);
    margin: 4px 0 0
}

.matrix-scroller {
    overflow: auto;
    border-radius: 14px
}

.qcvn-page .matrix {
    min-width: 1180px
}

.qcvn-page .matrix-row {
    grid-template-columns: 90px 1.05fr 1.55fr 1fr 1fr 130px 135px
}

.qcvn-page .matrix-row.header {
    top: 0;
    background: #09233a;
    box-shadow: 0 1px 0 #17445f
}

.qcvn-page .matrix-row .meta {
    font-size: var(--fs-2);
    color: #9bb4c5
}

.qcvn-page .matrix-row .meta strong {
    display: block;
    color: #dcebf4;
    font-size: var(--fs-2)
}

/* Better brand and content rhythm */
.hero {
    padding-top: 68px
}

.eyebrow {
    letter-spacing: .13em
}

.button {
    transition: transform .16s, box-shadow .16s, border-color .16s
}

.footer {
    margin-top: 0
}

.footer-grid {
    gap: 34px
}

.footer b {
    font-size: var(--fs-3)
}

.footer a {
    font-size: var(--fs-3)
}

@media(max-width:1380px) {
    .v3-header-row {
        grid-template-columns: 250px 1fr auto;
        gap: 14px
    }

    .v3-brand img {
        width: 112px
    }

    .v3-brand-copy strong {
        font-size: var(--fs-4)
    }

    .v3-nav-trigger {
        padding-inline: 8px;
        font-size: var(--fs-2)
    }

    .v3-secondary-cta {
        display: none
    }

    .v3-primary-cta {
        padding-inline: 12px
    }
}

@media(max-width:1120px) {
    .v3-header-row {
        grid-template-columns: 1fr auto
    }

    .v3-nav {
        display: none
    }

    .v3-brand img {
        width: 120px
    }

    .v3-primary-cta,
    .v3-secondary-cta {
        display: none
    }

    .v3-mobile-toggle {
        display: block
    }

    .v3-mega {
        display: none !important
    }

    .v3-quickbar {
        display: none
    }

    .qcvn-page .matrix-row.header {
        top: 0
    }
}

@media(max-width:760px) {
    :root {
        --v3-header-h: 68px;
        --v3-legal-h: 32px
    }

    .v3-legal-full {
        display: none
    }

    .v3-legal-short {
        display: inline
    }

    .v3-legal-strip .container {
        gap: 7px
    }

    .v3-legal-strip a {
        font-size: var(--fs-1)
    }

    .v3-header-row {
        grid-template-columns: minmax(0, 1fr) auto
    }

    .v3-brand {
        gap: 9px
    }

    .v3-brand img {
        width: 108px
    }

    .v3-brand-divider {
        height: 30px
    }

    .v3-brand-copy small {
        font-size: var(--fs-1);
        margin-top: 4px
    }

    .v3-lang {
        display: none
    }

    .v3-actions {
        gap: 6px
    }

    .qcvn-v3-summary {
        grid-template-columns: 1fr 1fr
    }

    .qcvn-page .matrix {
        min-width: 0
    }

    .qcvn-page .matrix-row {
        grid-template-columns: 1fr
    }

    .matrix-scroller {
        overflow: visible
    }
}

@media(max-width:420px) {
    .v3-brand-copy small {
        display: none
    }

    .v3-brand-divider {
        height: 26px
    }

    .v3-brand img {
        width: 100px
    }

    .qcvn-v3-summary {
        grid-template-columns: 1fr
    }

    .v3-legal-strip a {
        max-width: 88px;
        overflow: hidden;
        text-overflow: ellipsis
    }

    .v3-mobile-drawer {
        padding: 16px
    }
}

@media(prefers-reduced-motion:reduce) {

    .v3-nav-trigger svg,
    .v3-mega-tile,
    .button {
        transition: none !important
    }
}

.v3-mobile-drawer {
    background: #020a12
}