/* Shared controls, glass navigation and progressive motion. No interaction delays. */
:root{--control-surface:rgba(21,34,44,.8);--control-border:rgba(165,203,218,.23);--control-text:#e4edf1;--control-radius:14px;--ease-out:cubic-bezier(.19,1,.22,1)}
button,input,select,textarea{font:inherit}
.site-header{background:rgba(13,22,29,.44);border-color:rgba(203,233,245,.18);box-shadow:0 10px 32px rgba(0,0,0,.13),inset 0 1px 0 rgba(255,255,255,.025);backdrop-filter:blur(22px) saturate(135%);-webkit-backdrop-filter:blur(22px) saturate(135%);transition:background .35s ease,border-color .35s ease}
.site-header[data-scrolled]{background:rgba(13,22,29,.72);border-color:rgba(203,233,245,.12)}
.nav-links a{transition:background .18s ease,color .18s ease}
main :where(input:not([type=hidden]):not([type=checkbox]):not([type=radio]):not([type=range]):not([type=submit]),select,textarea){box-sizing:border-box;min-width:0;max-width:100%;min-height:46px;border:1px solid var(--control-border);border-radius:var(--control-radius);background:var(--control-surface);color:var(--control-text);padding:11px 15px;font:400 15px/1.5 var(--sans);transition:border-color .18s ease,box-shadow .18s ease,background .18s ease}
main :where(select){appearance:none;padding-right:42px;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 16 16' fill='none'%3E%3Cpath d='m4 6 4 4 4-4' stroke='%23aac7ce' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 14px center}
main :where(select[multiple]){background-image:none;padding-right:15px;min-height:100px}
main :where(option,optgroup){background:#14212a;color:#e4edf1}
main :where(textarea){resize:vertical;min-height:130px}
main :where(input,textarea)::placeholder{color:#8196a3;opacity:1}
main :where(input,select,textarea):focus-visible{outline:2px solid #91d2dd;outline-offset:3px;border-color:#77b5c2;box-shadow:0 0 0 4px rgba(113,196,210,.07)}
main :where(input[type=checkbox],input[type=radio]){accent-color:#badd7c;width:17px;height:17px;flex-shrink:0}
main :where(input[type=file]){font-size:13px;padding:8px}
main :where(input[type=file])::file-selector-button{padding:9px 14px;margin-right:14px;border:1px solid #4b6974;border-radius:9px;background:#203840;color:#d8ecee;font:500 13px/1.4 var(--sans);cursor:pointer}
main :where(button:not(.help-trigger):not(.icon-button):not(.correction-toggle):not([class])){min-height:44px;padding:11px 21px;border:1px solid var(--ny-action-bg);border-radius:var(--control-radius);background:var(--ny-action-bg);color:var(--ny-action-ink);font:600 14px/1.4 var(--sans);cursor:pointer;transition:background .18s ease,border-color .18s ease}
main :is(.primary-button,.blog-button,.project-button,.project-filters button,.guide-button,.search-row button,.catalog-submit){border-radius:var(--control-radius);background:#bfdf85;color:#182417;border:1px solid rgba(224,242,182,.22);font-weight:650;box-shadow:inset 0 1px 0 rgba(255,255,255,.12);transition:background .18s ease,box-shadow .18s ease}
main :is(.primary-button,.blog-button,.project-button,.project-filters button,.guide-button,.search-row button,.catalog-submit):hover{background:#cce99d;box-shadow:0 4px 15px rgba(163,202,92,.1)}
main :where(button,a,input,select,textarea):disabled,main [aria-disabled=true]{cursor:not-allowed;opacity:.55}
main :is(.blog-form,.form-field,.project-filters,.catalog-filters,.site-form,.guide-filters) :is(input:not([type=checkbox]):not([type=radio]):not([type=hidden]),select,textarea){background-color:var(--control-surface);color:var(--control-text);border-color:var(--control-border);border-radius:var(--control-radius);min-height:46px;font:400 15px/1.5 var(--sans)}
main :is(.blog-form,.form-field,.project-filters,.catalog-filters,.site-form,.guide-filters) select{appearance:none;padding-right:42px;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 16 16' fill='none'%3E%3Cpath d='m4 6 4 4 4-4' stroke='%23aac7ce' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 14px center}
main :is(.blog-form,.form-field,.project-filters,.catalog-filters,.site-form,.guide-filters) select[multiple]{background-image:none;padding-right:15px}
.site-form{display:grid;gap:20px}.site-form label{display:block;font-size:13px;color:#bacbd3}.site-form p{margin:0;display:grid;gap:8px}.site-form .helptext{color:#8fa7b3;font-size:12px}.site-form .errorlist{color:#f2bba9;padding-left:20px}
.search-row input{min-height:44px;background:transparent;border:0;border-radius:0;padding:7px 0;box-shadow:none}.search-row input:focus-visible{outline:0;box-shadow:none}.search-row:focus-within{border-color:#7cb4bf;box-shadow:0 0 0 3px rgba(124,180,191,.09)}
.search-row button{white-space:nowrap}
main .catalog-filters button,main .comment-form-footer button{border-radius:var(--control-radius);background:#bfdf85;color:#182417;border:1px solid rgba(224,242,182,.22);font-size:14px;font-weight:600}
main .course-comment-form :is(input,select,textarea),main .history-filter select{border-radius:var(--control-radius);border-color:var(--control-border);background-color:var(--control-surface);font-size:15px}
.catalog-materials>span,.catalog-materials>a{display:block}.catalog-materials>a{margin-top:5px;color:#a8ced6}
.nylon-ink{stroke-dasharray:1;stroke-dashoffset:0;stroke-linecap:round;stroke-linejoin:round;animation:nylon-write 1.65s var(--ease-out) both}
.nylon-ink-2{animation-duration:1.15s;animation-delay:1.05s}.nylon-ink-3{animation-duration:.8s;animation-delay:1.95s}.nylon-ink-4{animation-duration:.85s;animation-delay:2.45s}.nylon-ink-5{animation-duration:1.15s;animation-delay:3.05s}
@keyframes nylon-write{from{stroke-dashoffset:1}to{stroke-dashoffset:0}}
.nylon-glyph{animation:nylon-settle 4.3s linear both}@keyframes nylon-settle{0%,98%{mask:var(--ink-mask)}100%{mask:none}}
.motion-enter{animation:nylon-enter 1.05s var(--ease-out) both}
.motion-pending{opacity:0;transform:translateY(18px)}
.motion-visible{animation:nylon-reveal 1.15s var(--ease-out) both}
@keyframes nylon-enter{from{opacity:.32;transform:translateY(12px)}to{opacity:1;transform:none}}
@keyframes nylon-reveal{from{opacity:0;transform:translateY(18px)}to{opacity:1;transform:none}}
@supports not (backdrop-filter:blur(1px)){.site-header{background:rgba(13,22,29,.94)}}
@media(max-width:700px){main :where(input,select,textarea){font-size:16px}main :is(.blog-form,.form-field,.project-filters,.catalog-filters,.course-comment-form,.site-form,.guide-filters) :is(input,select,textarea){font-size:16px}.site-header{backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px)}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}.nylon-ink,.nylon-glyph,.motion-enter,.motion-visible{animation:none!important}.nylon-glyph{mask:none!important}.nylon-ink{stroke-dashoffset:0}.motion-pending{opacity:1;transform:none}.site-header,main input,main select,main textarea,main button{transition:none!important}}

/* One place for frequently used routes; the rest stay reachable without
   turning a phone's first screen into two rows of navigation. */
.site-header .nav-links{display:flex;align-items:center;justify-content:flex-end;gap:3px;width:auto;margin-left:auto}
.site-header .nav-links>a{font-size:14px;padding-inline:13px}
.site-header .site-nav-more{position:static}
.site-header .site-nav-more>summary{display:inline-flex;align-items:center;gap:6px;min-height:44px;padding:10px 13px;border-radius:12px;color:#c6d0d8;font-size:14px;line-height:1.4;list-style:none;cursor:pointer;user-select:none}
.site-header .site-nav-more>summary::-webkit-details-marker{display:none}
.site-header .site-nav-more>summary svg{width:15px;height:15px;fill:none;stroke:currentColor;stroke-width:1.5;stroke-linecap:round;stroke-linejoin:round;transition:transform .2s ease}
.site-header .site-nav-more[open]>summary svg{transform:rotate(180deg)}
.site-header .site-nav-more>summary:hover,.site-header .site-nav-more[open]>summary{background:rgba(255,255,255,.07);color:#fff}
.site-header .site-nav-more>summary:focus-visible{outline:2px solid #91d2dd;outline-offset:2px}
.site-header .site-nav-menu{position:absolute;z-index:3;top:calc(100% + 8px);right:0;width:min(430px,calc(100vw - 28px));padding:19px;border:1px solid rgba(170,210,223,.26);border-radius:20px;background:#121e26;box-shadow:0 24px 65px rgba(0,0,0,.38);animation:nylon-menu-open .2s var(--ease-out) both}
.site-header .site-nav-menu-primary{display:none}
.site-header .site-nav-menu-columns{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}
.site-header .site-nav-menu-group{display:grid;align-content:start;gap:3px;min-width:0}
.site-header .site-nav-menu-group>span{padding:4px 11px 7px;color:#91aab5;font:600 11px/1.4 var(--mono);letter-spacing:.08em}
.site-header .site-nav-menu a{display:flex;align-items:center;min-height:42px;padding:8px 11px;border-radius:9px;color:#d9e6e9;font-size:14px;line-height:1.45;text-decoration:none;white-space:normal}
.site-header .site-nav-menu a:hover,.site-header .site-nav-menu a:focus-visible{background:#20343c;color:#d6eea8}
.site-header .site-nav-menu-footer{margin-top:14px;padding-top:12px;border-top:1px solid rgba(170,210,223,.18)}
.site-header .site-nav-menu-footer a{justify-content:center;max-width:max-content;margin-inline:auto;padding-inline:15px;color:#bfd4d9;font-size:13px}
.site-header .nav-links>a[data-active]{background:rgba(153,211,218,.11);color:#e9f6f3}
.site-header .site-nav-more>summary[data-active]{background:rgba(153,211,218,.11);color:#e9f6f3}
.site-header .site-nav-menu a[data-active]{background:rgba(153,211,218,.055);box-shadow:inset 2px 0 rgba(153,211,218,.65);color:#e6f0ed}
.site-header .account-nav-short{display:none}
@keyframes nylon-menu-open{from{opacity:0;transform:translateY(-7px)}to{opacity:1;transform:none}}
@media(max-width:1100px){
  .site-header{flex-wrap:nowrap;gap:8px;min-height:66px;padding:9px 11px 9px 18px}
  .site-header .nav-links{display:flex;width:auto;gap:2px}
  .site-header .nav-links>.nav-primary{display:none}
  .site-header .nav-links>.nav-course{display:inline-flex;justify-content:center;padding-inline:10px;font-size:13px}
  .site-header .site-nav-menu-primary{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:3px;padding-bottom:12px;margin-bottom:15px;border-bottom:1px solid rgba(170,210,223,.18)}
  .site-header .site-nav-more>summary{padding-inline:10px;font-size:13px}
  .site-header .nav-links>.nav-action{padding-inline:11px;font-size:13px}
  .site-header .account-nav-label{display:none}
  .site-header .account-nav-short{display:inline}
}
@media(max-width:600px){
  .site-header .brand{gap:0}
  .site-header .site-nav-menu{left:0;right:0;width:auto;padding:15px}
  .site-header .site-nav-menu-columns{gap:8px}
}
@media(max-width:360px){.site-header .nav-links>.nav-course{display:none}}
@media(prefers-reduced-motion:reduce){.site-header .site-nav-menu{animation:none}.site-header .site-nav-more>summary svg{transition:none}}