:root{--ink:#15212b;--muted:#5d6a73;--paper:#fff;--soft:#f2f6f7;--brand:#075f63;--brand-dark:#034548;--line:#dbe4e6;--max:1180px}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;color:var(--ink);line-height:1.55;background:var(--paper)}a{color:var(--brand)}.site-header{display:flex;justify-content:space-between;align-items:center;gap:2rem;padding:1rem max(1.25rem,calc((100vw - var(--max))/2));border-bottom:1px solid var(--line);position:sticky;top:0;background:rgba(255,255,255,.96);z-index:20}.brand{display:flex;align-items:center;gap:.65rem;text-decoration:none;color:var(--ink);font-weight:800}.brand img{width:52px;height:auto}.site-header nav{display:flex;align-items:center;gap:1rem;flex-wrap:wrap}.site-header nav>a{text-decoration:none}.language-switcher{display:flex;border:1px solid var(--line);border-radius:999px;padding:.2rem}.language-switcher a{padding:.25rem .45rem;border-radius:999px;text-decoration:none;font-size:.78rem;font-weight:800}.language-switcher a.active{background:var(--brand);color:#fff}.hero{background:linear-gradient(135deg,#e8f4f3,#f8fbfb);padding:7rem max(1.25rem,calc((100vw - var(--max))/2))}.hero-copy{max-width:850px}.eyebrow{font-size:.8rem;text-transform:uppercase;letter-spacing:.13em;font-weight:800;color:var(--brand)}h1{font-size:clamp(2.5rem,6vw,5.1rem);line-height:1.03;margin:.35rem 0 1.3rem}h2{font-size:clamp(1.8rem,3vw,2.7rem);line-height:1.15}.lead{font-size:1.3rem;color:var(--muted);max-width:760px}.lead-small{font-size:1.15rem;color:var(--muted)}.actions{display:flex;gap:.8rem;flex-wrap:wrap;margin-top:1.7rem}.button{display:inline-block;padding:.8rem 1.05rem;border-radius:.5rem;border:1px solid var(--brand);background:var(--brand);color:#fff;text-decoration:none;font-weight:700}.button.secondary{background:transparent;color:var(--brand)}.section{max-width:var(--max);margin:auto;padding:4rem 1.25rem}.section.narrow{max-width:850px}.soft{max-width:none;background:var(--soft)}.section-inner{max-width:var(--max);margin:auto}.grid{display:grid;gap:1rem}.grid.three{grid-template-columns:repeat(3,1fr)}.grid.books-grid{grid-template-columns:repeat(auto-fit,minmax(250px,1fr))}.grid.two{grid-template-columns:repeat(2,1fr)}.card{padding:1.4rem;border:1px solid var(--line);border-radius:.8rem;background:#fff}.card h3{font-size:1.35rem;margin:.6rem 0}.card a{font-weight:750}.domain{display:inline-flex;align-items:center;justify-content:center;width:2.4rem;height:2.4rem;border-radius:50%;background:#e7f4f3;color:var(--brand);font-weight:900}.feature{min-height:170px}.language-note{margin-top:1.5rem;color:var(--muted);font-style:italic}details{border-bottom:1px solid var(--line);padding:1rem 0}summary{font-weight:750;cursor:pointer}footer{padding:2rem max(1.25rem,calc((100vw - var(--max))/2));border-top:1px solid var(--line);color:var(--muted)}@media(max-width:800px){.site-header{align-items:flex-start;flex-direction:column}.grid.three,.grid.two,.grid.books-grid{grid-template-columns:1fr}.hero{padding-top:4rem;padding-bottom:4rem}}

.card-link{display:block;text-decoration:none;color:inherit;transition:transform .18s ease,box-shadow .18s ease,border-color .18s ease}
.card-link:hover{transform:translateY(-3px);box-shadow:0 16px 34px rgba(16,64,53,.12);border-color:rgba(7,95,99,.38)}
.card-cta{display:inline-block;margin-top:.6rem;color:var(--brand);font-weight:800}
.mode-icon{display:inline-flex;width:2.7rem;height:2.7rem;align-items:center;justify-content:center;border-radius:.7rem;background:#e8f4f3;color:var(--brand);font-size:1.35rem;font-weight:900}

.domain{background:color-mix(in srgb,var(--book-accent,#075f63) 15%,white);color:var(--book-accent,#075f63)}

/* Content language affects pedagogical resources only; the interface remains English. */
.content-language-switcher{display:flex;align-items:center;gap:7px;color:#53655f;font-size:.72rem;font-weight:800;text-transform:uppercase;letter-spacing:.035em}
.content-language-switcher .language-switcher{display:flex;gap:3px}
@media(max-width:760px){.content-language-switcher>span{display:none}}

/* Login workspace --------------------------------------------------------- */
.login-page{
  min-height:100vh;
  display:flex;
  flex-direction:column;
  background:
    radial-gradient(circle at 18% 18%,rgba(7,95,99,.055),transparent 31rem),
    linear-gradient(180deg,#fbfdfd 0%,#f5f9f9 100%);
}
.login-site-header{
  position:relative;
  flex:0 0 auto;
}
.login-back-link{
  display:inline-flex;
  align-items:center;
  min-height:36px;
  padding:.42rem .72rem;
  border:1px solid var(--line);
  border-radius:.55rem;
  background:#fff;
  color:var(--brand-dark);
  font-size:.88rem;
  font-weight:750;
  text-decoration:none;
  transition:border-color .16s ease,background .16s ease,box-shadow .16s ease;
}
.login-back-link:hover{
  border-color:rgba(7,95,99,.34);
  background:#f4f9f9;
  box-shadow:0 5px 14px rgba(16,64,53,.07);
}
.login-main{
  width:100%;
  flex:1 0 auto;
  display:grid;
  place-items:center;
  padding:clamp(2rem,6vh,5.5rem) 1.25rem;
}
.login-shell{
  width:min(940px,100%);
  display:grid;
  grid-template-columns:minmax(0,.88fr) minmax(360px,1.12fr);
  overflow:hidden;
  border:1px solid #d7e4e3;
  border-radius:18px;
  background:#fff;
  box-shadow:0 22px 58px rgba(22,67,61,.11);
}
.login-context{
  min-height:430px;
  display:flex;
  flex-direction:column;
  justify-content:space-between;
  gap:2.5rem;
  padding:clamp(2rem,4vw,3rem);
  border-right:1px solid #d7e4e3;
  background:linear-gradient(145deg,#e8f4f2 0%,#f3f9f8 74%,#fbfdfd 100%);
}
.login-context h1{
  max-width:none;
  margin:.35rem 0 1.2rem;
  color:var(--brand-dark);
  font-size:clamp(2.45rem,4vw,3.55rem);
  letter-spacing:-.035em;
}
.login-context-copy{
  max-width:31rem;
  margin:0;
  color:#49615e;
  font-size:1.06rem;
  line-height:1.62;
}
.login-capabilities{
  display:flex;
  flex-wrap:wrap;
  gap:.5rem;
}
.login-capabilities span{
  display:inline-flex;
  align-items:center;
  min-height:30px;
  padding:.32rem .62rem;
  border:1px solid rgba(7,95,99,.13);
  border-radius:999px;
  background:rgba(255,255,255,.72);
  color:#315a56;
  font-size:.78rem;
  font-weight:800;
}
.login-panel{
  align-self:center;
  padding:clamp(2rem,4vw,3.15rem);
}
.login-panel-heading{
  margin-bottom:1.75rem;
}
.login-panel-heading .eyebrow{
  margin:0 0 .3rem;
}
.login-panel-heading h2{
  margin:.1rem 0 .5rem;
  color:#173833;
  font-size:clamp(2rem,3vw,2.55rem);
  letter-spacing:-.025em;
}
.login-panel-heading>p:last-child{
  margin:0;
  color:var(--muted);
}
.login-form{
  display:grid;
  gap:1.15rem;
}
.login-field{
  display:grid;
  gap:.42rem;
}
.login-field label{
  color:#314744;
  font-size:.86rem;
  font-weight:800;
}
.login-field input{
  width:100%;
  min-height:44px;
  padding:.68rem .78rem;
  border:1px solid #cbdad9;
  border-radius:.58rem;
  outline:none;
  background:#fff;
  color:var(--ink);
  font:inherit;
  transition:border-color .15s ease,box-shadow .15s ease,background .15s ease;
}
.login-field input:hover{
  border-color:#aebfbd;
}
.login-field input:focus{
  border-color:var(--brand);
  box-shadow:0 0 0 3px rgba(7,95,99,.11);
}
.login-field.has-error input{
  border-color:#ad3f3f;
  background:#fffafa;
}
.field-error{
  margin:0;
  color:#963737;
  font-size:.82rem;
  font-weight:650;
}
.login-alert{
  margin:0 0 1.25rem;
  padding:.82rem .9rem;
  border:1px solid #e4caca;
  border-radius:.62rem;
  background:#fff6f6;
  color:#873838;
  font-size:.88rem;
}
.login-alert p{
  margin:0;
}
.login-submit{
  min-height:44px;
  margin-top:.25rem;
  cursor:pointer;
  font:inherit;
  text-align:center;
  transition:background .15s ease,border-color .15s ease,box-shadow .15s ease,transform .15s ease;
}
.login-submit:hover{
  background:var(--brand-dark);
  border-color:var(--brand-dark);
  box-shadow:0 7px 18px rgba(7,95,99,.15);
}
.login-submit:active{
  transform:translateY(1px);
}
.login-submit:focus-visible,
.login-back-link:focus-visible{
  outline:3px solid rgba(7,95,99,.18);
  outline-offset:2px;
}
.login-footer{
  flex:0 0 auto;
  padding-top:1.25rem;
  padding-bottom:1.25rem;
  background:rgba(255,255,255,.72);
  font-size:.82rem;
}
@media(max-width:760px){
  .login-shell{grid-template-columns:1fr}
  .login-context{min-height:auto;border-right:0;border-bottom:1px solid #d7e4e3;padding:1.7rem}
  .login-context h1{font-size:2.4rem}
  .login-context-copy{font-size:.98rem}
  .login-panel{padding:1.7rem}
}
@media(max-width:520px){
  .login-main{padding:1.25rem .85rem 2rem}
  .login-site-header{align-items:center;flex-direction:row;padding-inline:1rem}
  .login-site-header .brand img{width:44px}
  .login-back-link{font-size:.8rem}
  .login-context,.login-panel{padding:1.35rem}
  .login-capabilities{gap:.35rem}
}

/* v0.2.0 — account registration and compact legal/privacy surfaces */
.register-main{padding-top:2rem;padding-bottom:2rem}.register-shell{width:min(1040px,100%)}.register-form{gap:.9rem}.register-help{color:#667773;font-size:.73rem;line-height:1.35}.register-help ul{margin:.3rem 0 0;padding-left:1.15rem}.register-privacy{display:grid;grid-template-columns:auto minmax(0,1fr);align-items:start;gap:.55rem .65rem;padding:.75rem .8rem;border:1px solid #d8e5e2;border-radius:.65rem;background:#f7fbfa;color:#405652;font-size:.8rem;line-height:1.4}.register-privacy input{width:18px;height:18px;margin:.1rem 0 0;accent-color:var(--brand)}.register-privacy a{color:var(--brand-dark);font-weight:800}.register-privacy .field-error{grid-column:2}
.legal-page{min-height:100vh;display:flex;flex-direction:column;background:linear-gradient(180deg,#fbfdfd,#f5f9f8)}.legal-main{width:min(920px,calc(100% - 2rem));margin:clamp(2rem,6vh,4.5rem) auto;flex:1}.legal-card{padding:clamp(1.5rem,4vw,2.6rem);border:1px solid var(--line);border-radius:18px;background:#fff;box-shadow:0 18px 48px rgba(16,64,53,.08)}.legal-card h1{margin:.2rem 0 .7rem;color:var(--brand-dark);font-size:clamp(2rem,4vw,3rem)}.legal-intro{max-width:760px;margin:0 0 1.8rem;color:var(--muted);font-size:1rem;line-height:1.55}.legal-card section{padding:1rem 0;border-top:1px solid #e3ece9}.legal-card section:first-of-type{border-top:0}.legal-card h2{margin:0 0 .55rem;color:#173e37;font-size:1.05rem}.legal-card p,.legal-card li{color:#485c57;line-height:1.55}.legal-card ul{margin:.45rem 0;padding-left:1.25rem}.legal-card code{padding:.08rem .28rem;border-radius:.25rem;background:#eef5f3;color:#164e43}.legal-config-warning{padding:.75rem .85rem;border:1px dashed #c9a55f;border-radius:.6rem;background:#fff9ed;color:#705725!important}.legal-footer,.landing-footer{display:flex;align-items:center;justify-content:center;gap:.7rem 1rem;flex-wrap:wrap;padding:1rem 1.25rem;border-top:1px solid var(--line);background:#fff;color:var(--muted);font-size:.78rem}.legal-footer a,.landing-footer a{color:var(--brand-dark);font-weight:750;text-decoration:none}.legal-footer a:hover,.landing-footer a:hover{text-decoration:underline}.landing-footer{justify-content:space-between}.landing-footer nav{display:flex;gap:.8rem;flex-wrap:wrap}.landing-privacy-summary{font-size:.73rem;color:#657570}
@media(max-width:760px){.landing-footer{justify-content:center;text-align:center}.landing-privacy-summary{width:100%}.legal-main{width:min(100% - 1rem,920px);margin:1rem auto 2rem}.legal-card{border-radius:14px}}

/* Registration password and identity feedback */
.required-mark{margin-left:.2rem;color:#a53d4c;font-weight:900}.password-requirements{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:.32rem .75rem;margin-top:.15rem;padding:.65rem .72rem;border:1px solid #dce8e5;border-radius:.6rem;background:#f8fbfa;color:#667773;font-size:.72rem;line-height:1.3}.password-requirements span{display:flex;align-items:center;gap:.42rem}.password-requirements span::before{content:'×';display:inline-grid;place-items:center;width:1.05rem;height:1.05rem;border-radius:50%;background:#eef3f2;color:#71827e;font-weight:900;line-height:1}.password-requirements span.is-valid{color:#176b56}.password-requirements span.is-valid::before{content:'✓';background:#dff3eb;color:#176b56}.password-requirements span.is-invalid{color:#8a4753}.password-requirements span.is-invalid::before{background:#f8e8eb;color:#a43e50}.password-match{margin-top:.15rem;color:#667773;font-size:.74rem;font-weight:700}.password-match::before{content:'•';margin-right:.35rem}.password-match.is-valid{color:#176b56}.password-match.is-valid::before{content:'✓'}.password-match.is-invalid{color:#a43e50}.password-match.is-invalid::before{content:'×'}@media(max-width:620px){.password-requirements{grid-template-columns:1fr}}


/* Landing information architecture refresh -------------------------------- */
.nav-portal-link{padding:.42rem .68rem;border:1px solid var(--line);border-radius:.5rem;background:#f4f9f8;font-weight:800}
.landing-entry-section{padding-top:3.5rem;padding-bottom:3.5rem}
.landing-entry-heading{max-width:790px;margin-bottom:1.4rem}
.landing-entry-heading h2{margin:.2rem 0 .65rem}
.landing-entry-heading .lead-small{margin:0}
.landing-entry-grid{align-items:stretch}
.landing-entry-card{min-height:235px;display:flex;flex-direction:column;align-items:flex-start}
.landing-entry-card p{margin-top:.15rem;color:var(--muted)}
.landing-entry-card .card-cta{margin-top:auto;padding-top:.8rem}
.entry-marker{display:inline-flex;align-items:center;justify-content:center;min-width:2.65rem;height:2.65rem;padding:0 .65rem;border-radius:.72rem;background:#e7f4f3;color:var(--brand);font-weight:900;letter-spacing:.025em}
.landing-why{padding-top:2.8rem;padding-bottom:3.6rem}
@media(max-width:800px){.landing-entry-card{min-height:0}.site-header nav{gap:.65rem .85rem}}

/* v0.2.0 — landing featured resource previews */
.landing-featured{display:grid;gap:2.4rem;padding-top:3.2rem;padding-bottom:3.8rem}
.landing-featured-heading{max-width:840px}
.landing-featured-heading h2{margin:.18rem 0 .65rem}
.landing-featured-heading .lead-small{margin:0}
.landing-feature-group{display:grid;gap:1rem}
.landing-feature-group-heading{display:flex;align-items:flex-end;justify-content:space-between;gap:1.25rem;padding-bottom:.2rem}
.landing-feature-group-heading h3{margin:.12rem 0 .25rem;color:var(--brand-dark);font-size:1.5rem}
.landing-feature-group-heading p{margin:0;color:var(--muted);max-width:740px}
.text-link{font-weight:800;text-decoration:none;white-space:nowrap}
.text-link:hover{text-decoration:underline}
.landing-feature-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:1rem}
.landing-feature-card{min-width:0;display:flex;flex-direction:column;gap:.72rem;padding:1.15rem;border:1px solid #d7e5e2;border-radius:14px;background:linear-gradient(145deg,#fff,#fbfdfd);box-shadow:0 8px 24px rgba(16,64,53,.045)}
.landing-feature-card h4{margin:0;color:#173f37;font-size:1.08rem;line-height:1.28}
.feature-card-topline,.feature-card-footer{display:flex;align-items:center;justify-content:space-between;gap:.65rem}
.feature-kind{color:var(--brand);font-size:.68rem;font-weight:900;letter-spacing:.065em;text-transform:uppercase}
.feature-reference{min-width:0;color:#687873;font-size:.7rem;font-weight:750;text-align:right;overflow-wrap:anywhere}
.feature-summary{margin:0;color:#50625e;font-size:.88rem;line-height:1.5}
.feature-tags{display:flex;flex-wrap:wrap;gap:.35rem}
.feature-tags span{display:inline-flex;padding:.24rem .5rem;border:1px solid #d9e8e4;border-radius:999px;background:#eef7f5;color:#345b52;font-size:.7rem;line-height:1.2}
.feature-card-footer{margin-top:auto;padding-top:.72rem;border-top:1px solid #e5eeec;color:#65756f;font-size:.75rem}
.preview-button{border:1px solid var(--brand);border-radius:.5rem;padding:.5rem .72rem;background:var(--brand);color:#fff;font:inherit;font-size:.78rem;font-weight:800;cursor:pointer}
.preview-button:hover{background:var(--brand-dark);border-color:var(--brand-dark)}
.landing-preview-dialog{width:min(920px,calc(100vw - 2rem));max-height:min(86vh,920px);padding:0;border:0;border-radius:18px;background:#fff;box-shadow:0 30px 90px rgba(9,46,40,.28)}
.landing-preview-dialog::backdrop{background:rgba(10,34,31,.48);backdrop-filter:blur(2px)}
.landing-preview-shell{display:grid;grid-template-rows:auto minmax(0,1fr) auto;max-height:min(86vh,920px)}
.landing-preview-header{display:flex;align-items:flex-start;justify-content:space-between;gap:1.2rem;padding:1.25rem 1.35rem;border-bottom:1px solid #dce8e5;background:linear-gradient(135deg,#e8f4f3,#f8fbfb)}
.landing-preview-header h2{margin:.15rem 0 .28rem;color:#173f37;font-size:clamp(1.5rem,3vw,2rem)}
.landing-preview-header p:last-child{margin:0;color:#5d706b;font-size:.82rem}
.dialog-close{display:grid;place-items:center;width:36px;height:36px;flex:0 0 auto;border:1px solid #cfe0dc;border-radius:50%;background:#fff;color:#31544c;font-size:1.45rem;line-height:1;cursor:pointer}
.landing-preview-body{overflow:auto;display:grid;gap:1rem;padding:1.25rem 1.35rem}
.landing-preview-body section{padding:0 0 1rem;border-bottom:1px solid #e5eeec}
.landing-preview-body section:last-child{padding-bottom:0;border-bottom:0}
.landing-preview-body h3{margin:0 0 .42rem;color:#214b42;font-size:.9rem}
.landing-preview-body p{margin:0;color:#425953;line-height:1.58}
.landing-preview-footer{display:flex;align-items:center;justify-content:flex-end;gap:.6rem;padding:1rem 1.35rem;border-top:1px solid #dce8e5;background:#fbfdfd}
.landing-preview-footer .button{padding:.58rem .8rem;cursor:pointer;font:inherit;font-weight:800}
.landing-course-outline{display:grid;gap:.45rem;margin:0;padding:0;list-style:none}
.landing-course-outline li{display:grid;grid-template-columns:30px minmax(0,1fr);gap:.62rem;align-items:start;margin-left:calc(var(--outline-depth,0) * 1.35rem);padding:.62rem .72rem;border:1px solid #dce8e5;border-radius:.65rem;background:#fbfdfd}
.outline-marker{display:grid;place-items:center;width:30px;height:30px;border-radius:.55rem;background:#e5f3ef;color:#145b4d;font-size:.72rem;font-weight:900}
.outline-copy{display:grid;gap:.12rem;min-width:0}
.outline-copy strong{color:#274b43;font-size:.86rem}
.outline-copy small{color:#697a75;font-size:.72rem;overflow-wrap:anywhere}
@media(max-width:900px){.landing-feature-grid{grid-template-columns:1fr}.landing-feature-group-heading{align-items:flex-start;flex-direction:column}.landing-feature-card{min-height:0}}
@media(max-width:600px){.landing-preview-dialog{width:calc(100vw - 1rem)}.landing-preview-header,.landing-preview-body,.landing-preview-footer{padding-left:1rem;padding-right:1rem}.landing-preview-footer{align-items:stretch;flex-direction:column}.landing-preview-footer .button{text-align:center}.landing-course-outline li{margin-left:calc(var(--outline-depth,0) * .65rem)}}

/* 2026-09-21 — first-login forced password change */
.login-link-button{appearance:none;border:0;background:transparent;font:inherit;cursor:pointer}
.password-help{font-size:.72rem;line-height:1.45;color:#61736e}
.password-help ul{margin:.35rem 0 0;padding-left:1.2rem}