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@media(max-width:380px){.shell{width:min(100% - 18px,1160px)}.topbar{padding-inline:9px}.brand span:last-child{display:none}.hero h1{font-size:36px}.hero-visual>img,.hero-visual{height:280px!important;min-height:280px!important}.pricing-card h2{font-size:34px}.palette{grid-template-columns:repeat(8,minmax(32px,1fr))}.mobile-tabbar{left:6px;right:6px;bottom:6px}.mobile-tabbar button{font-size:9px}}
.logo-brand{padding:0;min-width:0}.logo-brand img{display:block;width:184px;height:auto;max-height:52px;object-fit:contain}.light .logo-brand img{content:url("assets/rutapreu-logo.svg")}
@media(max-width:760px){.logo-brand img{width:142px;max-height:42px}}
@media(max-width:380px){.logo-brand img{content:url("assets/rutapreu-mark.svg")!important;width:38px;height:38px}}

.email-auth-form{display:grid;gap:12px;width:100%;margin-top:18px}.email-auth-form label{display:grid;gap:7px;color:var(--muted);font-size:13px;font-weight:700}.email-auth-form input{width:100%;border:1px solid var(--line);background:var(--bg);color:var(--text);border-radius:10px;padding:12px;font:inherit}.email-auth-form button{width:100%}.signout-btn{display:none;margin-top:12px}.logged-in .signout-btn{display:inline-block}.logged-in .email-auth-form{display:none}.logged-in .google-btn{display:none}.auth-required{border-color:#66502c!important;background:#302715!important}.auth-required h3:before{content:"🔒 ";}.auth-note{margin-top:14px;color:#ffd58a!important;font-size:12px;font-weight:800}.cloud-badge{display:inline-flex;align-items:center;gap:6px;margin-top:10px;padding:7px 10px;border:1px solid #73dda944;border-radius:999px;background:#73dda914;color:var(--green);font-size:12px;font-weight:900}
.light .email-auth-form input{background:#ffffff;color:#11251e}.light .auth-required{background:#fff1cf!important;border-color:#e5bd64!important}.light .auth-note{color:#6b4812!important}.light .cloud-badge{background:#e8f7ef;color:#12683f}

/* Mobile polish layer: RutaPreu app-like layout */
@supports(padding:max(0px)){
  body{padding-left:env(safe-area-inset-left);padding-right:env(safe-area-inset-right)}
}
html,body{max-width:100%;overflow-x:hidden}
button,input,select,textarea{-webkit-tap-highlight-color:transparent}
.primary,.secondary,.account-pill,.icon-btn,.subject-card,.mode-card,.topic-chip,.q-option,.mobile-tabbar button{touch-action:manipulation}
@media(max-width:760px){
  :root{--radius:18px}
  body{font-size:14px;line-height:1.5}
  .shell{width:100%;padding-inline:16px}
  .topbar{
    height:62px;
    padding:8px 12px;
    gap:8px;
    box-shadow:0 10px 32px #00000024;
  }
  .logo-brand{flex:1;min-width:0;justify-content:flex-start}
  .logo-brand img{width:min(138px,40vw);max-height:38px}
  .nav-tools{flex:0 0 auto}
  .streak-chip{
    display:inline-flex;
    align-items:center;
    justify-content:center;
    height:36px;
    max-width:72px;
    padding-inline:9px;
    border-radius:999px;
    font-size:11px;
  }
  .account-pill,.icon-btn{
    width:36px;
    height:36px;
    min-width:36px;
    border-radius:12px;
  }
  .hero{
    display:flex;
    flex-direction:column;
    padding:32px 16px 24px!important;
    gap:24px;
  }
  .hero-copy{width:100%}
  .eyebrow,.page-head>p,.section-title>p{
    font-size:10px;
    line-height:1.35;
    letter-spacing:.11em;
  }
  .hero h1{
    max-width:12ch;
    margin:14px 0 16px;
    font-size:clamp(37px,11.5vw,48px);
    line-height:.96;
    letter-spacing:-.06em;
  }
  .lead,.section-lead,.story-copy>p{
    max-width:34rem;
    font-size:15.5px;
    line-height:1.6;
  }
  .actions,.result-actions{
    grid-template-columns:1fr;
    gap:10px;
    margin:22px 0;
  }
  .primary,.secondary,.google-btn{
    min-height:48px;
    border-radius:14px;
    padding:13px 16px;
  }
  .trust{
    display:grid;
    grid-template-columns:1fr;
    gap:7px;
    font-size:12px;
  }
  .hero-visual{
    width:100%!important;
    min-height:0!important;
    aspect-ratio:4/3;
    margin:2px 0 0!important;
  }
  .hero-visual>img{
    height:100%!important;
    min-height:0!important;
    border-radius:22px;
  }
  .hero-visual:after{border-radius:22px}
  .hero-float{
    border-radius:14px;
    padding:10px 12px;
    box-shadow:0 16px 38px #00000040;
  }
  .hero-float.top{left:10px;top:10px}
  .hero-float.top b{font-size:20px}
  .hero-float.bottom{
    right:10px;
    bottom:10px;
    max-width:calc(100% - 20px);
  }
  .hero-float.bottom small{display:none}
  .metrics{
    width:calc(100% - 32px);
    margin-inline:auto;
    grid-template-columns:repeat(2,minmax(0,1fr));
    border:1px solid var(--line);
    border-radius:18px;
    overflow:hidden;
  }
  .metrics div{
    min-height:86px;
    padding:16px 10px;
    display:grid;
    place-items:center;
    align-content:center;
    gap:3px;
  }
  .metrics div:nth-child(odd){border-right:1px solid var(--line)}
  .metrics div:nth-child(1),.metrics div:nth-child(2){border-bottom:1px solid var(--line)}
  .metrics strong{font-size:21px;line-height:1.05}
  .metrics span{max-width:11ch;line-height:1.25}
  .section{padding:50px 16px}
  .section-title{margin-bottom:24px}
  .section-title.left{text-align:left}
  .section-title h2,.page-head h1,.story-copy h2{
    font-size:clamp(30px,9.2vw,40px);
    line-height:1.02;
  }
  .feature-grid,.pricing-grid,.account-grid{
    grid-template-columns:1fr;
    gap:12px;
  }
  .feature-grid article,.pricing-card,.account-card,.profile-form,.report-form,.history-card,.result-hero{
    padding:22px;
    border-radius:20px;
  }
  .premium-features article{min-height:0}
  .feature-grid h3{margin:22px 0 7px}
  .story-section{
    display:flex;
    flex-direction:column;
    padding:34px 16px 52px!important;
    gap:24px;
  }
  .story-image,.story-copy{width:100%}
  .story-image img{
    width:100%;
    min-height:0;
    aspect-ratio:4/3;
    border-radius:22px;
  }
  .story-copy ul{margin:20px 0}
  .story-copy li{padding:12px 0}
  .subject-grid,.subject-grid.large{
    grid-template-columns:1fr;
    gap:10px;
  }
  .subject-card{
    min-height:136px!important;
    padding:18px;
    border-radius:18px;
  }
  .subject-card h3{
    margin:24px 0 7px;
    font-size:18px;
  }
  .subject-code{font-size:24px}
  .plan-banner{
    width:calc(100% - 32px);
    margin:0 auto 56px;
    padding:26px!important;
    border-radius:22px;
  }
  .plan-banner h2{font-size:30px}
  .page{
    padding:34px 16px calc(92px + env(safe-area-inset-bottom));
  }
  .page-head{margin-bottom:24px}
  .notice{
    padding:15px 16px;
    border-radius:16px;
    font-size:13px;
  }
  .setup-card{
    margin-top:18px;
    padding:20px;
    border-radius:20px;
  }
  .setup-top{
    display:grid;
    grid-template-columns:auto 1fr;
    gap:12px;
  }
  .setup-icon{
    width:52px;
    height:52px;
    border-radius:14px;
    font-size:18px;
  }
  .setup-card h1{font-size:24px}
  .practice-modes{
    grid-template-columns:1fr;
    gap:9px;
    margin:22px 0 14px;
  }
  .mode-card{
    min-height:72px;
    padding:15px;
    border-radius:16px;
  }
  .custom-panel{
    margin:16px 0;
    padding:16px;
    border-radius:16px;
  }
  .topic-chips{
    display:grid;
    grid-template-columns:1fr;
    max-height:210px;
    gap:7px;
  }
  .topic-chip{
    width:100%;
    min-height:42px;
    border-radius:14px;
    text-align:left;
  }
  .count-row{gap:12px}
  .count-row select{width:100%;min-height:46px}
  .setup-facts{
    grid-template-columns:1fr;
    margin:20px 0;
  }
  .setup-facts div{padding:14px;border-radius:14px}
  .exam-bar{
    min-height:62px;
    grid-template-columns:66px 1fr 74px;
    padding:8px 12px;
    gap:8px;
    border-bottom-color:color-mix(in srgb,var(--line),transparent 20%);
  }
  .exam-bar .back{
    min-height:40px;
    padding:0;
    text-align:left;
    font-size:13px;
  }
  .exam-bar>div b{
    display:-webkit-box;
    overflow:hidden;
    -webkit-line-clamp:1;
    -webkit-box-orient:vertical;
    font-size:12px;
  }
  .exam-bar>div span{font-size:11px}
  .exam-bar>strong{
    font-size:13px;
    text-align:right;
  }
  .exam-layout{
    width:100%;
    padding:14px 12px calc(24px + env(safe-area-inset-bottom));
    gap:12px;
  }
  .question-card{
    padding:18px;
    border-radius:20px;
  }
  .q-meta{
    flex-wrap:wrap;
    gap:6px;
    margin-bottom:14px;
  }
  .tag{font-size:10px}
  .stimulus{
    max-height:none;
    padding:15px;
    margin:10px 0 18px;
    border-radius:16px;
    font-size:14px;
    line-height:1.62;
  }
  .stimulus h4{font-size:17px;line-height:1.25}
  .data-visual{
    margin:14px 0;
    padding:12px;
    border-radius:14px;
  }
  .data-visual table{
    min-width:520px;
    font-size:12px;
  }
  .math-card{
    grid-template-columns:1fr;
    padding:13px;
    border-radius:14px;
  }
  .triangle-visual,.rectangle-visual,.square-visual,.coordinate-visual,.work-visual,.circle-visual,.parabola-visual,.token-visual{
    min-height:96px;
    margin:14px 0;
    padding:13px;
    border-radius:14px;
  }
  .question-card h1{
    margin:16px 0 18px;
    font-size:18px;
    line-height:1.45;
  }
  .q-options{gap:9px}
  .q-option{
    min-height:58px;
    padding:13px;
    gap:10px;
    border-radius:16px;
  }
  .letter{
    flex:0 0 28px;
    width:28px;
    height:28px;
    border-radius:9px;
  }
  .exam-actions{
    grid-template-columns:1fr 1fr;
    gap:9px;
    margin-top:20px;
  }
  .exam-actions .primary{
    grid-column:1/-1;
    width:100%;
  }
  .exam-layout aside{
    order:2;
    padding:16px;
    border-radius:20px;
  }
  .palette{
    grid-template-columns:repeat(5,minmax(0,1fr));
    gap:7px;
  }
  .palette button{
    min-height:42px;
    border-radius:12px;
    font-size:12px;
  }
  .legend{flex-wrap:wrap}
  .result-stats,.progress-summary{
    grid-template-columns:repeat(2,minmax(0,1fr));
    gap:10px;
  }
  .score{font-size:58px}
  .result-hero h1{font-size:28px}
  .stat-box{
    padding:16px;
    border-radius:16px;
  }
  .stat-box b{font-size:24px}
  .topic-row{
    grid-template-columns:1fr;
    gap:8px;
    padding:14px 0;
    border-bottom:1px solid var(--line);
  }
  .topic-row b{justify-self:start}
  .review-head{
    grid-template-columns:1fr;
    padding:16px;
  }
  .review-head span{justify-self:start}
  .review-body{padding:0 16px 18px}
  .profile-card{
    grid-template-columns:52px 1fr;
    gap:14px;
  }
  .profile-card button{grid-column:1/-1}
  .avatar{
    width:52px;
    height:52px;
    border-radius:15px;
  }
  .profile-form,.report-form{max-width:none}
  .profile-form input,.report-form input,.report-form select,.report-form textarea{
    min-height:46px;
    border-radius:13px;
    font-size:16px;
  }
  .pricing-card h2{font-size:38px}
  .pricing-card.featured{box-shadow:0 18px 48px #00000026}
  .pricing-faq{
    grid-template-columns:1fr;
    padding:18px;
    border-radius:18px;
  }
  .history-card{padding:18px}
  .history-head{align-items:start}
  .history-row{
    grid-template-columns:1fr;
    gap:3px;
    padding:14px 0;
  }
  footer .shell{
    min-height:auto;
    padding:24px 16px calc(92px + env(safe-area-inset-bottom));
    text-align:center;
    gap:8px;
  }
  .mobile-tabbar{
    left:12px;
    right:12px;
    bottom:max(10px,env(safe-area-inset-bottom));
    padding:6px;
    border-radius:20px;
  }
  .mobile-tabbar button{
    min-height:50px;
    border-radius:15px;
  }
  .mobile-tabbar button.active{
    background:var(--lime);
    color:#102016;
    box-shadow:0 10px 24px #d5ff6324;
  }
}
@media(max-width:420px){
  .shell{padding-inline:12px}
  .topbar{height:58px;padding-inline:10px}
  .logo-brand img{content:url("assets/rutapreu-mark.svg")!important;width:36px;height:36px}
  .streak-chip{max-width:64px;font-size:10px}
  .account-pill{display:none}
  .hero{padding-inline:12px!important}
  .hero h1{font-size:clamp(34px,11vw,40px)}
  .hero-visual{aspect-ratio:1/1}
  .metrics,.plan-banner{width:calc(100% - 24px)}
  .section,.story-section,.page{padding-left:12px;padding-right:12px}
  .feature-grid article,.pricing-card,.account-card,.profile-form,.report-form,.history-card,.result-hero,.setup-card,.question-card{padding:18px}
  .mobile-tabbar{left:8px;right:8px}
  .mobile-tabbar button{font-size:9px}
}
@media(max-width:340px){
  .streak-chip{display:none}
  .hero h1{font-size:32px}
  .metrics strong{font-size:19px}
  .result-stats,.progress-summary{grid-template-columns:1fr}
  .palette{grid-template-columns:repeat(4,minmax(0,1fr))}
}

.pricing-trust{
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  gap:10px;
  max-width:850px;
  margin:18px auto 0;
}
.pricing-trust article{
  display:flex;
  align-items:center;
  gap:11px;
  min-width:0;
  padding:15px;
  border:1px solid var(--line);
  border-radius:15px;
  background:linear-gradient(145deg,var(--panel),var(--bg));
}
.pricing-trust i{
  flex:0 0 32px;
  display:grid;
  place-items:center;
  width:32px;
  height:32px;
  border-radius:10px;
  background:#d5ff6314;
  color:var(--lime);
  font-style:normal;
  font-weight:900;
}
.pricing-trust b,.pricing-trust span{display:block}
.pricing-trust b{font-size:12px;line-height:1.25}
.pricing-trust span{margin-top:3px;color:var(--muted);font-size:10px;line-height:1.35}
@media(max-width:900px){.pricing-trust{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:520px){
  .pricing-trust{grid-template-columns:1fr;gap:8px}
  .pricing-trust article{padding:13px 14px}
  .pricing-trust b{font-size:13px}
  .pricing-trust span{font-size:11px}
}

.about-section{
  display:grid;
  grid-template-columns:.88fr 1.12fr;
  gap:54px;
  align-items:start;
  padding:90px 0;
  scroll-margin-top:86px;
}
.about-intro h2{
  max-width:540px;
  margin:15px 0 20px;
  font-size:clamp(36px,4.6vw,58px);
  line-height:1.02;
  letter-spacing:-.045em;
}
.about-intro>p:not(.eyebrow){max-width:590px;color:var(--muted);font-size:17px}
.about-goal{
  position:relative;
  display:grid;
  margin-top:32px;
  padding:26px;
  overflow:hidden;
  border:1px solid #d5ff6350;
  border-radius:22px;
  background:linear-gradient(135deg,#17382d,#0d201b);
}
.about-goal:after{
  content:"";
  position:absolute;
  width:150px;
  height:150px;
  right:-50px;
  bottom:-70px;
  border-radius:50%;
  background:#d5ff6318;
}
.about-goal small{color:var(--green);font-weight:900;letter-spacing:.12em}
.about-goal strong{margin:8px 0 0;color:var(--lime);font-size:58px;line-height:1;letter-spacing:-.06em}
.about-goal span{max-width:290px;color:var(--text);font-size:14px}
.about-goal b{margin-top:17px;color:var(--green);font-size:11px;letter-spacing:.05em}
.about-steps{display:grid;gap:12px}
.about-steps article{
  display:grid;
  grid-template-columns:54px 1fr;
  gap:18px;
  min-height:150px;
  padding:26px;
  border:1px solid var(--line);
  border-radius:22px;
  background:var(--panel);
}
.about-steps article>span{
  display:grid;
  place-items:center;
  width:46px;
  height:46px;
  border-radius:14px;
  background:#d5ff6312;
  color:var(--lime);
  font-weight:900;
}
.about-steps h3{margin:1px 0 8px;font-size:21px}
.about-steps p{margin:0;color:var(--muted)}
@media(max-width:900px){.about-section{grid-template-columns:1fr;gap:28px;padding:64px 0}.about-intro h2{max-width:680px}.about-goal{max-width:560px}}
@media(max-width:520px){
  .about-section{padding:50px 12px;scroll-margin-top:70px}
  .about-intro h2{font-size:36px}
  .about-intro>p:not(.eyebrow){font-size:15px}
  .about-goal{padding:22px;border-radius:18px}
  .about-goal strong{font-size:50px}
  .about-steps article{grid-template-columns:44px 1fr;gap:12px;min-height:0;padding:20px;border-radius:18px}
  .about-steps article>span{width:40px;height:40px;border-radius:12px}
  .about-steps h3{font-size:18px}
}