/* ============================================================
   FDOS™ — Responsive Stylesheet
   Breakpoints:
     1200px  — Large desktop cap
     1024px  — Small laptop / large tablet landscape
      768px  — Tablet portrait / large mobile landscape
      480px  — Mobile landscape / small tablet
      360px  — Small mobile
   ============================================================ */

@media (min-width: 1600px) and (max-width: 1800px)  {
    .main_menu .logo {
        height: 120px;
    } 
    
    .web_footer .footer-logo {
        max-width: 210px;
        margin: 0 auto 24px;
    }
    
    .hero h1 {
        font-size: 2.5em;
        margin-bottom: 30px;
    }
 
    section {
        padding: 90px 40px;
    }
    
    section h2 {
        font-size: 2em;
        margin-bottom: 40px;
    }
    
    section h3 {
        font-size: 1.4em;
        margin-bottom: 25px;
    }
    
    section p {
        font-size: 1.1em;
        line-height: 1.9;
    }
}  
 
@media (min-width: 1400px) and (max-width: 1599px) {
    
    .legal-section h2 {
        font-size: 1.8em;
        margin-bottom: 4px;
        margin-top: 25px;
    }
    
    .legal-section h3 {
        font-size: 1.5em;
        margin-bottom: 20px;
        margin-top: 7px;
    }
    
    .main_menu {
        padding: 16px 0;
    }

    .main_menu .logo {
        height: 100px;
    } 
    
    .web_footer .footer-logo {
        max-width: 175px;
        margin: 0 auto 24px;
    }
    
    .hero h1 {
        font-size: 2.5em;
        margin-bottom: 30px;
    }
 
    section {
        padding: 90px 40px;
    }
    
    section h2 {
        font-size: 2em;
        margin-bottom: 40px;
    }
    
    section h3 {
        font-size: 1.4em;
        margin-bottom: 25px;
    }
    
    section p {
        font-size: 1.1em;
        line-height: 1.9;
    }
}

@media (min-width: 1360px) and (max-width: 1399px) {
    
    .legal-section h2 {
        font-size: 1.8em;
        margin-bottom: 4px;
        margin-top: 25px;
    }
    
    .legal-section h3 {
        font-size: 1.5em;
        margin-bottom: 20px;
        margin-top: 7px;
    }
    
    .main_menu {
        padding: 16px 0;
    }

    .main_menu .logo {
        height: 100px;
    } 
    
    .web_footer .footer-logo {
        max-width: 175px;
        margin: 0 auto 24px;
    }
    
    .hero h1 {
        font-size: 2.5em;
        margin-bottom: 30px;
    }
 
    section {
        padding: 90px 40px;
    }
    
    section h2 {
        font-size: 2em;
        margin-bottom: 40px;
    }
    
    section h3 {
        font-size: 1.4em;
        margin-bottom: 25px;
    }
    
    section p {
        font-size: 1.1em;
        line-height: 1.9;
    }
}

@media(min-width:1280px) and (max-width:1359px){
    
    .legal-section h2 {
        font-size: 1.8em;
        margin-bottom: 4px;
        margin-top: 25px;
    }
    
    .legal-section h3 {
        font-size: 1.5em;
        margin-bottom: 20px;
        margin-top: 7px;
    }
    
    .container {
        padding: 0 30px;
    }
    
    .main_menu {
        padding: 16px 0;
    }

    .main_menu .logo {
        height: 100px;
    } 
    
    .web_footer .footer-logo {
        max-width: 175px;
        margin: 0 auto 24px;
    }
    
    .hero h1 {
        font-size: 2.5em;
        margin-bottom: 30px;
    }
 
    section {
        padding: 80px 30px;
    }
    
    section h2 {
        font-size: 2em;
        margin-bottom: 30px;
    }
    
    section h3 {
        font-size: 1.4em;
        margin-bottom: 20px;
    }
    
    section p {
        font-size: 1.1em;
        line-height: 1.9;
    } 
    
    .hero {
        padding: 100px 30px;
    }
    
    .page-header {
        padding: 70px 30px;
    }

    .legal-section {
        padding: 50px 30px;
    }

    .category-section {
        padding: 70px 30px;
    }

    .technical-access {
        padding: 80px 30px;
    }

    .trademark-notice {
        padding: 70px 30px;
    }

    .inquiry-box {
        padding: 70px 40px;
    }

    .waitlist-box {
        padding: 70px 40px;
    }
    
    .legal-section h2 {
        font-size: 1.5em;
        margin-bottom: 5px;
        margin-top: 20px;
    }
}
 
@media(min-width:992px) and (max-width:1279px){
    
    .legal-section h3 {
        font-size: 1.5em;
        margin-bottom: 20px;
        margin-top: 12px;
    }

     .container {
        padding: 0 30px;
    }
    
    .main_menu {
        padding: 16px 0;
    }

    .main_menu .logo {
        height: 100px;
    } 
    
    .main_menu ul {
        list-style: none;
        display: flex;
        gap: 28px;
    }
    
    .web_footer .footer-logo {
        max-width: 175px;
        margin: 0 auto 24px;
    }
    
    .hero h1 {
        font-size: 2em;
        margin-bottom: 25px;
    }
 
    section {
        padding: 80px 30px;
    }
    
    section h1 {
        font-size: 2em;
        margin-bottom: 25px;
    }
    
    section h2 {
        font-size: 1.5em;
        margin-bottom: 20px;
    }
    
    section h3 {
        font-size: 1em;
        margin-bottom: 20px;
    }
    
    section p {
        font-size: 1em;
        line-height: 1.9;
    } 
    
    .hero {
        padding: 100px 30px;
    }
    
    .page-header {
        padding: 70px 30px;
    }

    .legal-section {
        padding: 50px 30px;
    }

    .category-section {
        padding: 70px 30px;
    }

    .technical-access {
        padding: 80px 30px;
    }

    .trademark-notice {
        padding: 70px 30px;
    }

    .inquiry-box {
        padding: 70px 40px;
    }

    .waitlist-box {
        padding: 70px 40px;
    }  
    
    .vault.frameworks .registered-badge {
        margin-top: 100px !important;
    }
    /* old */
    
    .vault-categories {
        grid-template-columns: repeat(2, 1fr);
    }

    .ip-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 25px;
    }

    .books-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .sequence-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
    }

    .differentiation-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .training-phases {
        grid-template-columns: repeat(2, 1fr);
    }

    .cases-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .independence-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .advantages-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .customization-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .process-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .partnership-process {
        grid-template-columns: repeat(2, 1fr);
    }

    .system-layers {
        gap: 14px;
    }

    .system-layers .layer {
        padding: 24px 14px;
    }
    
    .comparison-row {
        gap: 24px;
    }

    .access-container {
        padding: 50px 40px;
    }

    .trademark-badge {
        padding: 50px 40px;
    }

    .error-code {
        font-size: 6em;
    }
    
    .layer-diagram {
        padding: 32px;
        margin: 50px 0;
    }
    
    .legal-section h2 {
        font-size: 1.5em;
        margin-bottom: 5px;
        margin-top: 20px;
    }
    

}

 
@media(min-width:768px) and (max-width:991px){
    
    .main_nave_open nav.main_menu {
        position: absolute;
        width: 100%;
        top: 0;
        left: 0;
        height: 100vh;
        z-index: 999;
    }
    
    body.main_nave_open {
        position: relative;
        overflow: hidden;
    }
    
    button.nav-toggle[aria-expanded="true"] span:nth-child(2) {
        display: none;
    }
    
     button.nav-toggle[aria-expanded="true"] span:first-child {
        transform: rotate(45deg);
    }
    
    button.nav-toggle[aria-expanded="true"] span:last-child {
        transform: rotate(132deg);
        margin-top: -2px;
    }
    
    .nav-toggle {
        display: flex;
    }

   button.nav-toggle[aria-expanded="true"] {
        display: block;
        height: 35px;
    }
    
    .container {
        padding: 0 30px;
    }
    
    .main_menu {
        padding: 16px 0;
    }

    .main_menu .logo {
        height: 100px;
        padding: 5px;
    }
    
    .main_menu ul {
        list-style: none;
        gap: 32px;
        display: none;
    }
    
    .web_footer .footer-logo {
        max-width: 120px;
        margin: 0 auto 24px;
    }
    
    .hero h1 {
        font-size: 2em;
        margin-bottom: 25px;
    }
 
    section {
        padding: 80px 30px;
    }
    
    section h1 {
        font-size: 2em;
        margin-bottom: 25px;
    }
    
    section h2 {
        font-size: 1.5em;
        margin-bottom: 20px;
    }
    
    section h3 {
        font-size: 1em;
        margin-bottom: 20px;
    }
    
    section p {
        font-size: 1em;
        line-height: 1.9;
    } 
    
    .hero {
        padding: 100px 30px;
    }
    
    .page-header {
        padding: 70px 30px;
    }

    .legal-section {
        padding: 50px 30px;
    }

    .category-section {
        padding: 70px 30px;
    }

    .technical-access {
        padding: 80px 0px;
    }

    .trademark-notice {
        padding: 70px 30px;
    }

    .inquiry-box {
        padding: 70px 40px;
    }

    .waitlist-box {
        padding: 70px 40px;
    }  
    
    .vault.frameworks .registered-badge {
        margin-top: 40px !important;
    }
    
   /* old */
    /* ── Navigation — hamburger menu ── */
    nav .container {
        flex-wrap: wrap;
        position: relative;
    }
    
    nav ul {
        display: none;
        flex-direction: column;
        gap: 0;
        width: 100%;
        background: #1a2332;
        padding: 10px 0 20px;
        margin-top: 10px;
        border-top: 1px solid #d4af37;
    }

    nav ul.open {
        display: flex;
        row-gap: 10px;
        height: 100vh;
    }

    nav ul li {
        border-bottom: 1px solid rgba(212, 175, 55, 0.2);
    }

    nav ul li:last-child {
        border-bottom: none;
    }

    nav a {
        display: block;
        padding: 14px 20px;
        font-size: 0.95em;
    }

    /* ── Typography ── */
    .hero h1 {
        font-size: 2em;
    }

    .hero .subtitle {
        font-size: 1.1em;
    }

    .hero {
        padding: 80px 20px;
    }

    .page-header {
        padding: 60px 20px;
    }

    .page-header h1 {
        font-size: 2em;
    }

    .page-header .subtitle {
        font-size: 1.1em;
    }

    section {
        padding: 60px 0px;
    }

    section h2 {
        font-size: 1.8em;
        margin-bottom: 30px;
    }

    section h3 {
        font-size: 1.4em;
    }

    .legal-section {
        padding: 40px 20px;
    }

    .category-section {
        padding: 60px 0px;
    }

    /* ── Index: system visual — stack horizontal layers ── */
    .system-layers {
        flex-direction: column;
        gap: 40px;
    }

    .system-layers .layer:not(:last-child):after {
        content: "↓";
        right: auto;
        left: 50%;
        top: auto;
        bottom: -30px;
        transform: translateX(-50%);
    }

    /* ── Grids → single column ── */
    .vault-categories {
        grid-template-columns: 100%;
        row-gap: 25px;
    }

    .levels {
       grid-template-columns: 100%;
        row-gap: 25px;
    }

    .licensing-grid {
       grid-template-columns: 100%;
        row-gap: 25px;
    }

    .ip-grid {
       grid-template-columns: 100%;
        row-gap: 25px;
    }

    .books-grid {
       grid-template-columns: 100%;
        row-gap: 25px;
    }

    .sequence-grid {
       grid-template-columns: 100%;
        row-gap: 25px;
    }

    .dependency-grid {
       grid-template-columns: 100%;
        row-gap: 25px;
    }

    .comparison-row {
       grid-template-columns: 100%;
        row-gap: 25px;
    }

    .level-grid {
       grid-template-columns: 100%;
        row-gap: 25px;
    }

    .requirements-grid {
      grid-template-columns: 100%;
        row-gap: 25px;
    }

    .differentiation-grid {
      grid-template-columns: 100%;
        row-gap: 25px;
    }

    .training-phases {
      grid-template-columns: 100%;
        row-gap: 25px;
    }

    .process-grid {
       grid-template-columns: 100%;
        row-gap: 25px;
    }

    .categories-grid {
       grid-template-columns: 100%;
        row-gap: 25px;
    }

    .entity-details {
      grid-template-columns: 100%;
        row-gap: 25px;
    }

    .expectations-grid {
      grid-template-columns: 100%;
        row-gap: 25px;
    }

    .journey-grid {
       grid-template-columns: 100%;
        row-gap: 25px;
    }

    .independence-grid {
      grid-template-columns: 100%;
        row-gap: 25px;
    }

    .distinction-grid {
       grid-template-columns: 100%;
        row-gap: 25px;
    }

    .access-grid {
      grid-template-columns: 100%;
        row-gap: 25px;
    }

    .models-grid {
      grid-template-columns: 100%;
        row-gap: 25px;
    }

    .cases-grid {
     grid-template-columns: 100%;
        row-gap: 25px;
    }

    .advantages-grid {
      grid-template-columns: 100%;
        row-gap: 25px;
    }

    .customization-grid {
      grid-template-columns: 100%;
        row-gap: 25px;
    }

    .partnership-process {
       grid-template-columns: 100%;
        row-gap: 25px;
    }

    /* ── Boxes — reduce padding ── */
    .explanation-box {
        padding: 30px 25px;
    }

    .not-box {
        padding: 30px 25px;
    }

    .timeline {
        padding: 30px 25px;
    }

    .waitlist-box {
        padding: 50px 25px;
    }

    .waitlist-box h3 {
        font-size: 1.8em;
    }

    .foundation-box {
        padding: 40px 25px;
    }

    .standards-box {
        padding: 40px 25px;
    }

    .controlled-access {
        padding: 40px 25px;
    }

    .timeline-box {
        padding: 40px 25px;
    }

    .realization-box {
        padding: 40px 25px;
    }

    .enterprise-statement {
        padding: 40px 25px;
    }

    .inquiry-box {
        padding: 50px 25px;
    }

    .inquiry-box h3 {
        font-size: 1.8em;
    }

    .layer-diagram {
        padding: 40px 20px;
    }

    .access-container {
        padding: 40px 25px;
    }

    .access-container h2 {
        font-size: 1.8em;
    }

    .trademark-badge {
        padding: 40px 25px;
    }

    .trademark-badge h2 {
        font-size: 2em;
    }

    .qualified-parties {
        padding: 25px;
    }

    .value-statement {
        padding: 40px 25px;
    }

    .value-statement h3 {
        font-size: 1.6em;
    }

    .response-statement {
        padding: 40px 25px;
    }

    .response-statement h3 {
        font-size: 1.6em;
    }

    .scalability-statement {
        padding: 40px 25px;
    }

    .scalability-statement h3 {
        font-size: 1.6em;
    }

    .category-header {
        padding: 30px 25px;
    }

    /* ── 404 ── */
    .error-code {
        font-size: 5em;
    }

    .error-title {
        font-size: 2em;
    }

    .nav-links {
        gap: 15px;
    }

    .nav-links a {
        font-size: 1em;
        padding: 12px 20px;
    }

    /* ── system.html layer arrows ── */
    .layers .layer:not(:last-child):after {
        font-size: 1.5em;
        bottom: -28px;
    }
    
    .comparison-table {
        padding: 30px;
    }
    
    .integration-box {
        padding: 30px;
        margin: 40px 0;
    }
    
    .principle-box {
        padding: 30px;
        margin: 40px 0;
    }
    
    .warning-box {
        padding: 30px;
        margin: 40px 0;
    }
    
    .provenance-box {;
        padding: 30px;
        margin: 40px 0;
    }
    
    .independence-item {
        padding: 30px;
    }
    
    .creator-statement {
        padding: 30px;
        margin: 40px 0;
    }
    
    .not-accepted-box {
        padding: 30px;
        margin: 40px 0;
    }
    
    .entity-box {
        padding: 30px;
        margin: 40px 0;
    }
    
    .category-card {
        padding: 30px;
    }
    
    .pirmaru_button {
        margin-top: 15px;
        padding: 7px 25px;
        background: #d4af37;
        border-radius: 4px;
    }
    
    .legal-section h3 {
        font-size: 1.2em;
        margin-bottom: 8px;
        margin-top: 25px;
    }
    
    .legal-section h2 {
        font-size: 1.5em;
        margin-bottom: 5px;
        margin-top: 20px;
    }
}
 
@media(min-width:320px) and (max-width:767px){
    
    .legal-section h3 {
        font-size: 1em;
        margin-bottom: 20px;
        margin-top: 35px;
    }

    .pirmaru_button {
        margin-top: 15px;
        padding: 6px 21px;
        background: #d4af37;
        border-radius: 4px;
    }
        
    button.nav-toggle[aria-expanded="true"] span:nth-child(2) {
        display: none;
    }
    
     button.nav-toggle[aria-expanded="true"] span:first-child {
        transform: rotate(45deg);
    }
    
    button.nav-toggle[aria-expanded="true"] span:last-child {
        transform: rotate(132deg);
        margin-top: -2px;
    }

    .main_nave_open nav.main_menu {
        position: absolute;
        width: 100%;
        top: 0;
        left: 0;
        height: 100vh;
        z-index: 999;
    }
    
    body.main_nave_open {
        position: relative;
        overflow: hidden;
    }

    .nav-toggle {
        display: flex;
    }

   button.nav-toggle[aria-expanded="true"] {
        display: block;
        height: 35px;
    }
    
    .container {
        padding: 0 16px;
    }
    
    .main_menu {
        padding: 10px 0;
    }

     .main_menu .logo {
        height: 100px;
        width: 120px;
        padding: 5px;
    }
    
    .main_menu ul {
        list-style: none;
        gap: 32px;
        display: none;
    }
    
    .web_footer .footer-logo {
        max-width: 130px;
        margin: 0 auto 24px;
    }
 
    section {
        padding: 50px 0px;
    }
    
    section h1 {
        font-size: 2em;
        margin-bottom: 25px;
    }
    
    section h2 {
        font-size: 1.5em;
        margin-bottom: 20px;
    }
    
    section h3 {
        font-size: 1em;
        margin-bottom: 20px;
    }
    
    section p {
        font-size: 1em;
        line-height: 1.9;
    } 
    
    .hero {
        padding: 100px 30px;
    }
    
    .page-header {
        padding: 70px 30px;
    }

    .legal-section {
        padding: 50px 30px;
    }

    .category-section {
        padding: 70px 30px;
    }

    .technical-access {
        padding: 80px 30px;
    }

    .trademark-notice {
        padding: 70px 30px;
    }

    .inquiry-box {
        padding: 70px 40px;
    }

    .waitlist-box {
        padding: 70px 40px;
    }  
    
    .vault.frameworks .registered-badge {
        margin-top: 100px !important;
    }
    
       /* old */
    /* ── Navigation — hamburger menu ── */
    nav .container {
        flex-wrap: wrap;
        position: relative;
    }
    
    nav ul {
        display: none;
        flex-direction: column;
        gap: 0;
        width: 100%;
        background: #1a2332;
        padding: 10px 0 20px;
        margin-top: 10px;
        border-top: 1px solid #d4af37;
    }

    .main_menu ul.open {
        display: flex;
        row-gap: 10px;
        height: 100vh;
    }

    nav ul li {
        border-bottom: 1px solid rgba(212, 175, 55, 0.2);
    }

    nav ul li:last-child {
        border-bottom: none;
    }

    nav a {
        display: block;
        padding: 14px 20px;
        font-size: 0.95em;
    }

    /* ── Typography ── */
    .hero h1 {
        font-size: 2em;
    }

    .hero .subtitle {
        font-size: 1.1em;
    }

    .hero {
        padding: 80px 20px;
    }

    .page-header {
        padding: 60px 20px;
    }

    .page-header h1 {
        font-size: 2em;
    }

    .page-header .subtitle {
        font-size: 1.1em;
    }


    .legal-section {
        padding: 40px 20px;
    }

    .category-section {
        padding: 60px 20px;
    }

    .system-visual {
        padding: 16px;
        margin: 50px 0;
    }

    /* ── Index: system visual — stack horizontal layers ── */
    .system-layers {
        flex-direction: column;
        gap: 40px;
    }

    .system-layers .layer:not(:last-child):after {
        content: "↓";
        right: auto;
        left: 50%;
        top: auto;
        bottom: -30px;
        transform: translateX(-50%);
    }

    /* ── Grids → single column ── */
    .vault-categories {
        grid-template-columns: 100%;
        row-gap: 25px;
    }

    .levels {
        grid-template-columns: 100%;
        row-gap: 25px;
    }

    .licensing-grid {
        grid-template-columns: 100%;
        row-gap: 25px;
    }

    .ip-grid {
        grid-template-columns: 100%;
        row-gap: 25px;
    }

    .books-grid {
        grid-template-columns: 100%;
        row-gap: 25px;
    }

    .sequence-grid {
        grid-template-columns: 100%;
        row-gap: 25px;
    }

    .dependency-grid {
        grid-template-columns: 100%;
        row-gap: 25px;
    }

    .comparison-row {
        grid-template-columns: 100%;
        row-gap: 25px;
    }

    .level-grid {
        grid-template-columns: 100%;
        row-gap: 25px;
    }

    .requirements-grid {
        grid-template-columns: 100%;
        row-gap: 25px;
    }

    .differentiation-grid {
        grid-template-columns: 100%;
        row-gap: 25px;
    }

    .training-phases {
        grid-template-columns: 100%;
        row-gap: 25px;
    }

    .process-grid {
        grid-template-columns: 100%;
        row-gap: 25px;
    }

    .categories-grid {
        grid-template-columns: 100%;
        row-gap: 25px;
    }

    .entity-details {
        grid-template-columns: 100%;
        row-gap: 25px;
    }

    .expectations-grid {
        grid-template-columns: 100%;
        row-gap: 25px;
    }

    .journey-grid {
        grid-template-columns: 100%;
        row-gap: 25px;
    }

    .independence-grid {
        grid-template-columns: 100%;
        row-gap: 25px;
    }

    .distinction-grid {
        grid-template-columns: 100%;
        row-gap: 25px;
    }

    .access-grid {
         grid-template-columns: 100%;
        row-gap: 25px;
    }

    .models-grid {
        grid-template-columns: 100%;
        row-gap: 25px;
    }

    .cases-grid {
        grid-template-columns: 100%;
        row-gap: 25px;
    }

    .advantages-grid {
        grid-template-columns: 100%;
        row-gap: 25px;
    }

    .customization-grid {
        grid-template-columns: 100%;
        row-gap: 25px;
    }

    .partnership-process {
        grid-template-columns: 100%;
        row-gap: 25px;
    }

    /* ── Boxes — reduce padding ── */
    .explanation-box {
        padding: 30px 25px;
    }

    .not-box {
        padding: 30px 25px;
    }

    .timeline {
        padding: 30px 25px;
    }

    .waitlist-box {
        padding: 50px 25px;
    }

    .waitlist-box h3 {
        font-size: 1.8em;
    }

    .foundation-box {
        padding: 40px 25px;
    }

    .standards-box {
        padding: 40px 25px;
    }

    .controlled-access {
        padding: 40px 20px;
    }

    .timeline-box {
        padding: 40px 25px;
    }

    .realization-box {
        padding: 40px 25px;
    }

    .enterprise-statement {
        padding: 40px 25px;
    }

    .inquiry-box {
        padding: 50px 25px;
    }

    .inquiry-box h3 {
        font-size: 1.8em;
    }

    .layer-diagram {
        padding: 40px 20px;
    }

    .access-container {
        padding: 40px 25px;
    }

    .access-container h2 {
        font-size: 1.8em;
    }

    .trademark-badge {
        padding: 40px 25px;
    }

    .trademark-badge h2 {
        font-size: 2em;
    }

    .qualified-parties {
        padding: 25px;
    }

    .value-statement {
        padding: 40px 25px;
    }

    .value-statement h3 {
        font-size: 1.6em;
    }

    .response-statement {
        padding: 40px 25px;
    }

    .response-statement h3 {
        font-size: 1.6em;
    }

    .scalability-statement {
        padding: 40px 25px;
    }

    .scalability-statement h3 {
        font-size: 1.6em;
    }
    
    .category-header {
        padding: 25px 22px;
    }

    /* ── 404 ── */
    .error-code {
        font-size: 5em;
    }

    .error-title {
        font-size: 2em;
    }

    .nav-links {
        gap: 15px;
    }
    
    .nav-links a {
        font-size: 1em;
        padding: 8px 15px;
    }

    /* ── system.html layer arrows ── */
    .layers .layer:not(:last-child):after {
        font-size: 1.5em;
        bottom: -28px;
    }
    
    .layers .layer {
        padding: 15px;
        border-left: 3px solid #d4af37;
    }
    
    .layers .layer li:before {
        margin-right: 5px;
    }
    
    .principle-box {
        padding: 15px;
        margin: 18px 0;
    }
    
    .integration-box {
        background: #ffffff;
        padding: 20px;
        border-left: 3px solid #d4af37;
        margin: 40px 0;
    }
    
    .dependency-item {
        padding: 15px;
        border-left: 2px solid #d4af37;
    }
    
    .sequence-steps li {
        padding: 12px 0 12px 25px;
    }
    
    .sequence-steps li:before {
        left: 0px;
    }
    
    .warning-box {
        padding: 25px;
        margin: 40px 0;
    }

    .creator-statement {
        padding: 20px;
        margin: 40px 0;
    }
    
    .provenance-box {
        padding: 20px;
        margin: 40px 0;
    }
    
    .access-item {
        padding: 20px;
    }
    
    .access-statement {
        padding: 20px;
        margin: 40px 0;
    }
    
    .distinction-box {
        padding: 25px;
        margin: 40px 0;
    }
    
    .manuscript-intro {
        padding: 25px;
        margin: 40px 0;
    }
    
    .distinction-box h3 {
        line-height: 1.2em;
    }
    
    .standards-statement {
        padding: 20px;
        margin: 40px 0;
    }
    
    .white-label-intro {
        padding: 25px;
        margin: 40px 0;
    }
    
    .customization-card {
        padding: 25px;
    }
    
    .integrity-box {
        padding: 25px;
        margin: 50px 0;
    }
    
    .entity-box {
        padding: 15px;
        margin: 40px 0;
    }
    
    .not-accepted-box {
        padding: 15px;
        margin: 40px 0;
        border-left: 2px solid #d4af37;
    }
    
    .privacy-statement h3 {
        font-size: 1.3em;
        margin-bottom: 20px;
    }
        
    .not-accepted-box h3 {
        font-size: 1.5em;
        line-height: 1.5;
        margin-bottom: 20px;
    }

    .privacy-statement {
        padding: 15px;
        margin: 40px 0;
    }
    
    .detail-item {
        padding: 15px;
        border-top: 2px solid #d4af37;
    }

}
   

/* ============================================================
   480px — Mobile landscape / small phones
   ============================================================ */
@media (max-width: 480px) {

    /* ── Container / spacing ── */

    .hero {
        padding: 60px 15px;
    }

    .page-header {
        padding: 50px 16px;
    }

    .legal-section {
        padding: 30px 0px;
    }

    .category-section {
        padding: 50px 0px;
    }

    .technical-access {
        padding: 60px 16px;
    }

    .legal-section h2 {
        font-size: 1.2em;
        margin-bottom: 8px;
        margin-top: 25px;
        letter-spacing: 0.5px;
    }
    
    .licensing-item {
        padding: 20px;
    }
    
    .legal-section li {
        font-size: 1.05em;
        margin-bottom: 0px;
    }

    /* ── Hero / Headers ── */
    .hero h1 {
        font-size: 1.7em;
        letter-spacing: 0.5px;
    }

    .hero .subtitle {
        font-size: 1em;
    }

    .page-header h1 {
        font-size: 1.7em;
    }

    .page-header .subtitle {
        font-size: 1em;
    }

    /* ── Section typography ── */
    section h2 {
        font-size: 1.6em;
    }

    section h3 {
        font-size: 1.3em;
    }

    section p {
        font-size: 1em;
    }

    /* ── Nav ── */
    nav {
        padding: 18px 0;
    }

    nav .logo {
        font-size: 1.2em;
    }

    /* ── Cards — tighten padding ── */
    .level-card,
    .level-grid .level-card {
        padding: 30px 20px;
    }

    .vault-category {
        padding: 25px 20px;
    }

    .book-card {
        padding: 30px 20px;
    }

    .book-card h3 {
        font-size: 1.4em;
    }

     .ip-card {
        padding: 25px 10px;
    }

    .ip-card h3 {
        font-size: 1.3em;
    }

    .sequence-card {
        padding: 25px 20px;
    }

    .journey-card {
        padding: 25px 20px;
    }

    .requirement-card {
        padding: 25px 20px;
    }

    .phase-card {
        padding: 25px 20px;
    }

    .expectation-item {
        padding: 20px 15px;
    }
    
    .category-card {
        padding: 30px 20px;
        border-left: 3px solid #d4af37;
    }

    .independence-item {
        padding: 25px 20px;
    }

    .advantage-item {
        padding: 25px 20px;
    }

    .model-card {
        padding: 30px 15px;
    }

    .model-card h3 {
        font-size: 1.5em;
    }

    .category-card {
        padding: 30px 15px;
    }

    .category-card h3 {
        font-size: 1.4em;
    }

    .case-card {
        padding: 25px 15px;
    }

    .process-step {
        padding: 25px 15px;
    }

    .partnership-process .process-step {
        padding: 25px 15px;
    }

    /* ── Highlighted statement boxes ── */
    .waitlist-box {
        padding: 40px 15px;
    }

    .waitlist-box h3 {
        font-size: 1.5em;
    }

    .inquiry-box {
        padding: 40px 15px;
    }

    .inquiry-box h3 {
        font-size: 1.5em;
    }

    .inquiry-box p,
    .waitlist-box p {
        font-size: 1em;
    }
    
    .trademark-badge {
        padding: 30px 10px;
    }

    .trademark-badge h2 {
        font-size: 1.6em;
        letter-spacing: 1px;
    }

    .access-container {
        padding: 30px 16px;
    }

    .access-container h2 {
        font-size: 1.6em;
    }

    .qualified-parties {
        padding: 20px 16px;
    }

    .value-statement h3 {
        font-size: 1.4em;
    }

    .response-statement h3 {
        font-size: 1.4em;
    }
    
    .controlled-access h3 {
        font-size: 1.4em;
        margin-bottom: 20px;
        line-height: 1.5;
    }
    
    .entity-box h3 {
        font-size: 1.4em;
        margin-bottom: 20px;
        line-height: 1.4;
    }
    
    .main_menu a {
        color: #e8e6e0;
        text-decoration: none;
        font-size: 0.95em;
        font-family: 'Arial', sans-serif;
        transition: color 0.3s;
        letter-spacing: 0.5px;
        padding: 10px 15px;
    }

    .controlled-access p {
        color: #e8e6e0;
        font-size: 16px;
        line-height: 1.6;
    }

    .contact-info {
        padding: 20px 15px;
        margin-top: 25px;
    }
    
    .scalability-statement h3 {
        font-size: 1.4em;
    }

    .category-header h2 {
        font-size: 1.6em;
    }

    .layer-diagram {
        padding: 30px 16px;
    }

    /* ── Button ── */
    .btn {
        padding: 15px 30px;
        font-size: 0.9em;
    }

    .request-access-btn {
        padding: 14px 30px;
        font-size: 1em;
    }

    /* ── 404 ── */
    .error-code {
        font-size: 4em;
    }

    .error-title {
        font-size: 1.6em;
    }

    .error-message {
        font-size: 1em;
    }

    .nav-links {
        flex-direction: column;
        align-items: center;
        gap: 12px;
    }

    .nav-links a {
        width: 100%;
        max-width: 280px;
        text-align: center;
    }

    /* ── Comparison table ── */
    .comparison-table {
        padding: 25px 16px;
    }

    /* ── Legal ── */
    .legal-section ul {
        margin-left: 20px;
    }

    /* ── Footer ── */
    footer {
        padding: 30px 16px;
    }

    /* ── Step numbers ── */
    .level-number {
        font-size: 2.2em;
    }
    
    .level-grid .level-card h3 {
        font-size: 1.5em;
        margin-bottom: 20px;
    }

    .step-number {
        font-size: 2em;
    }
    
    .differentiation-item {
        padding: 20px;
    }
}

/* ============================================================
   360px — Very small mobile
   ============================================================ */
@media (max-width: 360px) {

    .hero h1,
    .page-header h1 {
        font-size: 1.45em;
    }

    nav .logo {
        font-size: 1.1em;
        letter-spacing: 1px;
    }

    section h2 {
        font-size: 1.4em;
    }

    .error-code {
        font-size: 3.5em;
        letter-spacing: 3px;
    }

    .error-title {
        font-size: 1.4em;
    }

    .trademark-badge h2 {
        font-size: 1.4em;
        letter-spacing: 1px;
    }

    .btn {
        padding: 13px 20px;
        font-size: 0.85em;
    }

    .container {
        padding: 0 12px;
    }

    section {
        padding: 40px 12px;
    }
    

}