@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800;900&family=Fraunces:wght@700;800;900&display=swap');

:root{
  --teal:#0d9488;
  --teal-d:#0f766e;
  --teal-l:#ccfbf1;
  --slate:#0f172a;
  --slate-m:#475569;
  --slate-l:#64748b;
  --slate-xl:#f8fafc;
  --amber:#f59e0b;
  --amber-l:#fef3c7;
  --green:#16a34a;
  --green-l:#dcfce7;
  --red:#dc2626;
  --red-l:#fee2e2;
  --white:#ffffff;
  --nav-h:68px;
  --shadow:0 12px 40px rgba(15,118,110,.08);
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:'Inter',system-ui,sans-serif;color:var(--slate);background:var(--slate-xl)}
a{text-decoration:none}
img{max-width:100%;display:block}
button,input,textarea,select{font:inherit}
button{cursor:pointer}

.nav{
  position:sticky;top:0;z-index:1000;height:var(--nav-h);
  display:flex;align-items:center;justify-content:space-between;
  padding:0 2rem;background:rgba(255,255,255,.92);
  backdrop-filter:blur(14px);border-bottom:1px solid rgba(15,23,42,.06);
}
.nav-logo{font-family:'Fraunces',serif;font-size:1.35rem;font-weight:900;color:var(--slate)}
.nav-logo span{color:var(--teal)}
.nav-links{display:flex;gap:.45rem;align-items:center;flex-wrap:wrap}
.nav-link{
  color:var(--slate-l);font-size:.9rem;font-weight:700;padding:.55rem .95rem;
  border-radius:999px;transition:.2s ease;background:transparent;
}
.nav-link:hover,.nav-link.active{background:rgba(13,148,136,.1);color:var(--teal-d)}
.nav-user{display:flex;align-items:center;gap:.75rem}
.nav-avatar,.teacher-pip,.prof-avatar,.s-avatar{
  width:38px;height:38px;border-radius:999px;display:flex;align-items:center;justify-content:center;
  background:linear-gradient(135deg,var(--teal-d),var(--teal));color:#fff;font-weight:800;box-shadow:var(--shadow)
}
.nav-name{font-weight:700;color:var(--slate-m);font-size:.92rem}
.nav-logout{
  border:1px solid rgba(15,23,42,.08);background:#fff;color:var(--slate-m);
  padding:.55rem .9rem;border-radius:999px;font-weight:700
}
.nav-logout:hover{background:#f8fafc}

.btn,.btn-white{
  display:inline-flex;align-items:center;justify-content:center;gap:.45rem;
  border:none;border-radius:1rem;padding:.9rem 1.15rem;font-weight:800;transition:.2s ease
}
.btn:hover,.btn-white:hover{transform:translateY(-1px)}
.btn-primary{background:linear-gradient(135deg,var(--teal-d),var(--teal));color:#fff;box-shadow:var(--shadow)}
.btn-full{width:100%}
.btn-white{background:#fff;color:var(--teal-d);box-shadow:0 10px 30px rgba(0,0,0,.08)}
.btn-sm{padding:.7rem 1rem;border-radius:.9rem;font-size:.9rem}
.btn-post{background:linear-gradient(135deg,var(--teal-d),var(--teal));color:#fff;border:none}
.btn-skip{background:transparent;color:var(--slate-l);border:1px solid rgba(148,163,184,.35)}

.input, textarea, select{
  width:100%;border:1.5px solid #dbe5ec;background:#fff;color:var(--slate);
  border-radius:1rem;padding:.95rem 1rem;outline:none;transition:.2s ease
}
.input:focus, textarea:focus, select:focus{border-color:var(--teal);box-shadow:0 0 0 4px rgba(13,148,136,.12)}
textarea{min-height:120px;resize:vertical}

.badge{
  display:inline-flex;align-items:center;gap:.35rem;padding:.33rem .7rem;border-radius:999px;
  font-size:.73rem;font-weight:800;line-height:1;white-space:nowrap
}
.badge-teal{background:rgba(13,148,136,.12);color:var(--teal-d)}
.badge-slate{background:#e2e8f0;color:var(--slate-m)}
.badge-green{background:var(--green-l);color:var(--green)}
.badge-amber{background:var(--amber-l);color:#b45309}
.badge-red{background:var(--red-l);color:var(--red)}
.badge-dark-teal{background:rgba(45,212,191,.12);color:#5eead4}
.badge-dark-slate{background:rgba(148,163,184,.18);color:#cbd5e1}
.badge-dark-green{background:rgba(34,197,94,.14);color:#86efac}
.badge-dark-amber{background:rgba(245,158,11,.14);color:#fcd34d}
.badge-dark-red{background:rgba(239,68,68,.14);color:#fca5a5}

.q-time,.q-time-dark{font-size:.78rem;color:var(--slate-l);font-weight:700;margin-left:auto}
.q-time-dark{color:rgba(255,255,255,.45)}
.card,.q-card,.q-item,.sidebar-card,.feed-sidebar-card,.student-card,.dash-card,.q-preview{
  background:#fff;border:1px solid #e8f5f4;border-radius:1.4rem;box-shadow:0 4px 20px rgba(15,118,110,.05)
}
.empty,.empty.card{text-align:center;padding:3rem 1.5rem;color:var(--slate-l)}
.empty .icon{font-size:2.4rem;display:block;margin-bottom:.8rem}

.footer,.footer-copy{color:var(--slate-l)}
.footer{padding:2rem;text-align:center}
.footer-logo{font-family:'Fraunces',serif;font-size:1.4rem;font-weight:900;color:var(--slate)}
.footer-logo span{color:var(--teal)}

.reveal{opacity:0;transform:translateY(22px);transition:all .6s ease}
.reveal.visible{opacity:1;transform:none}
.delay-1{transition-delay:.08s}.delay-2{transition-delay:.16s}.delay-3{transition-delay:.24s}
@keyframes fadeUp{from{opacity:0;transform:translateY(18px)}to{opacity:1;transform:none}}

.hint-box,.info-box,.toast{
  border-radius:1rem;padding:.95rem 1rem;font-size:.86rem;font-weight:600
}
.hint-box{background:#f8fafc;color:var(--slate-m);border:1px solid #e2e8f0;margin-top:1rem}
.error-box.show{display:block}
.error-box{display:none;background:var(--red-l);color:var(--red);border-radius:.9rem;padding:.8rem 1rem;margin-bottom:1rem}

.step-dot{width:10px;height:10px;border-radius:999px;background:#cbd5e1;display:inline-block}
.step-dot.active,.step-dot.done{background:var(--teal)}

.toast{
  position:fixed;right:20px;bottom:20px;z-index:9999;background:var(--slate);color:#fff;
  box-shadow:0 14px 34px rgba(2,6,23,.25);opacity:0;transform:translateY(10px);pointer-events:none;
  transition:.25s ease
}
.toast.show{opacity:1;transform:none}
.toast.success{background:#14532d}.toast.error{background:#991b1b}.toast.info{background:#0f172a}

@media (max-width:900px){
  .nav{padding:0 1rem}
  .nav-links{display:none}
}
@media (max-width:640px){
  .nav-name{display:none}
  .nav{height:60px}
}


.lang-switcher{display:flex;align-items:center;gap:.45rem;padding:.35rem .6rem;border:1px solid rgba(15,23,42,.08);background:#fff;border-radius:999px}
.lang-switcher label{font-size:.75rem;font-weight:700;color:var(--slate-l)}
.lang-switcher select{border:none;background:transparent;color:var(--slate);font-weight:700;outline:none;padding-right:.2rem}
.lang-fixed{position:fixed;top:18px;right:18px;z-index:1200;box-shadow:var(--shadow)}
@media (max-width:640px){.lang-switcher label{display:none}.lang-switcher{padding:.35rem .45rem}}

/* Responsive polish 2026 */
html,body{max-width:100%;overflow-x:hidden}
body{min-width:0}
.main,.page,.container,.dashboard,.content,.wrap,section{max-width:100%}

@media (max-width:1024px){
  .nav{gap:.75rem;padding:0 1rem}
  .nav-user{gap:.5rem}
  .btn,.btn-white{padding:.82rem 1rem}
}

@media (max-width:760px){
  :root{--nav-h:60px}
  body{font-size:15px}
  .nav{height:auto;min-height:var(--nav-h);padding:.65rem .85rem;align-items:flex-start;gap:.6rem;flex-wrap:wrap}
  .nav-logo{font-size:1.1rem;line-height:1.2}
  .nav-user{margin-left:auto}
  .nav-avatar,.teacher-pip,.prof-avatar,.s-avatar{width:34px;height:34px;font-size:.9rem}
  .nav-logout{padding:.48rem .7rem;font-size:.82rem}
  .nav-links{display:flex!important;order:3;width:100%;gap:.35rem;overflow-x:auto;flex-wrap:nowrap;padding:.1rem 0 .15rem;scrollbar-width:none}
  .nav-links::-webkit-scrollbar{display:none}
  .nav-link{flex:0 0 auto;font-size:.8rem;padding:.5rem .75rem;background:#fff;border:1px solid rgba(15,23,42,.06)}
  .card,.q-card,.q-item,.sidebar-card,.feed-sidebar-card,.student-card,.dash-card,.q-preview{border-radius:1.05rem}
  .btn,.btn-white{width:100%;min-height:44px;border-radius:.9rem}
  .btn-sm{width:auto;min-height:40px;padding:.65rem .85rem}
  .input,textarea,select{font-size:16px;border-radius:.9rem;padding:.85rem .9rem}
  .badge{white-space:normal;line-height:1.25}
  .q-time,.q-time-dark{margin-left:0;display:block;margin-top:.35rem}
  .footer{padding:1.4rem .9rem calc(1.4rem + env(safe-area-inset-bottom))}
  .footer-logo{font-size:1.2rem}
  .footer-copy{font-size:.82rem}
  .toast{left:12px;right:12px;bottom:12px;text-align:center}
  .lang-fixed{top:10px;right:10px}
}

@media (max-width:480px){
  body{font-size:14px}
  .nav{padding:.55rem .7rem}
  .nav-logo{font-size:1rem}
  .nav-link{font-size:.76rem;padding:.46rem .62rem}
  .nav-logout{font-size:.78rem;padding:.42rem .58rem}
  .empty,.empty.card{padding:2rem 1rem}
}