/* ═══════════════════════════════════════════
   GrammarQuiz — shared styles
═══════════════════════════════════════════ */
:root{
  --bg:       #F4F1EB;
  --surface:  #FFFFFF;
  --surf2:    #EAE6DC;
  --ink:      #18160F;
  --ink2:     #5C5849;
  --ink3:     #9C9486;
  --accent:   #1D4ED8;
  --accent-lt:#EEF2FF;
  --accent-dk:#1239B0;
  --green:    #166534;
  --green-lt: #DCFCE7;
  --red:      #991B1B;
  --red-lt:   #FEE2E2;
  --border:   rgba(24,22,15,.09);
  --border2:  rgba(24,22,15,.17);
  --r:        10px;
  --rlg:      16px;
  --rxl:      22px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:'DM Sans',sans-serif;
  background:var(--bg);color:var(--ink);
  font-size:16px;line-height:1.6;min-height:100vh;
}
button{font-family:inherit;cursor:pointer}
input,textarea,select{font-family:inherit}
a{color:inherit;text-decoration:none}

/* NAV */
nav{
  position:sticky;top:0;z-index:200;
  height:54px;display:flex;align-items:center;
  padding:0 clamp(1rem,4vw,2.5rem);
  background:rgba(244,241,235,.9);
  backdrop-filter:blur(14px);
  border-bottom:1px solid var(--border);
}
.logo{
  font-family:'Syne',sans-serif;
  font-weight:800;font-size:18px;letter-spacing:-.03em;
}
.logo span{color:var(--accent)}

/* LANG SWITCHER */
.lang-switcher{margin-left:auto;position:relative}
.lang-cur{
  display:flex;align-items:center;gap:5px;
  padding:5px 11px;border-radius:99px;
  border:1px solid var(--border2);background:transparent;
  font-family:inherit;font-size:12px;font-weight:500;color:var(--ink2);
  cursor:pointer;transition:border-color .14s,color .14s;
  white-space:nowrap;
}
.lang-cur:hover{border-color:var(--ink);color:var(--ink)}
.lang-chevron{font-size:9px;opacity:.55;margin-left:1px}
.lang-drop{
  display:none;position:absolute;top:calc(100% + 6px);right:0;
  background:var(--surface);border:1px solid var(--border);
  border-radius:var(--rlg);padding:4px;
  box-shadow:0 8px 28px rgba(24,22,15,.13);
  min-width:168px;z-index:300;
}
.lang-drop.open{display:block;animation:mfade .15s ease}
.lang-opt{
  display:flex;align-items:center;gap:9px;
  width:100%;padding:7px 12px;border-radius:var(--r);
  border:none;background:transparent;
  font-family:inherit;font-size:13px;font-weight:400;color:var(--ink);
  cursor:pointer;text-align:left;transition:background .12s;
}
.lang-opt:hover{background:var(--surf2)}
.lang-opt.active{font-weight:600;color:var(--accent)}

/* AD SLOTS */
.ad-slot{
  background:var(--surf2);border:1px dashed var(--border2);
  border-radius:var(--r);
  display:flex;align-items:center;justify-content:center;
  color:var(--ink3);font-size:12px;text-align:center;
}
.ad-leader{min-height:90px;max-width:728px;margin:0 auto}
.ad-rect{min-height:250px;max-width:300px;margin:0 auto}

/* FEEDBACK LINK */
.footer-feedback{
  font-size:12px;color:var(--ink3);
  background:none;border:none;cursor:pointer;
  font-family:inherit;padding:0;
  transition:color .15s;text-decoration:underline;text-underline-offset:3px;
}
.footer-feedback:hover{color:var(--accent)}

/* FOOTER */
footer{
  margin-top:4rem;
  border-top:1px solid var(--border);
  padding:1.25rem clamp(1rem,4vw,2.5rem);
  display:flex;align-items:center;justify-content:space-between;
  flex-wrap:wrap;gap:8px;
}
.footer-logo{font-family:'Syne',sans-serif;font-size:14px;font-weight:700}
.footer-logo span{color:var(--accent)}
.footer-copy{font-size:12px;color:var(--ink3)}

/* BREADCRUMB */
.breadcrumb{
  display:inline-flex;align-items:center;gap:5px;
  font-size:13px;color:var(--ink3);
  margin-bottom:1.2rem;transition:color .15s;
  text-decoration:none;
}
.breadcrumb:hover{color:var(--accent)}

/* BUTTONS */
.btn-outline{
  padding:10px 24px;border-radius:99px;
  border:1.5px solid var(--border2);background:transparent;
  color:var(--ink);font-size:14px;font-weight:500;
  transition:background .15s,border-color .15s,color .15s;
}
.btn-outline:hover{background:var(--ink);color:#fff;border-color:var(--ink)}
.btn-primary{
  padding:10px 24px;border-radius:99px;
  border:none;background:var(--accent);
  color:#fff;font-size:14px;font-weight:500;
  transition:background .15s;
}
.btn-primary:hover{background:var(--accent-dk)}

/* MODAL */
.modal-overlay{
  display:none;position:fixed;inset:0;z-index:500;
  background:rgba(24,22,15,.45);
  align-items:flex-start;justify-content:center;
  padding:2rem 1rem;overflow-y:auto;
}
.modal-overlay.open{display:flex;animation:mfade .2s ease}
@keyframes mfade{from{opacity:0}to{opacity:1}}
.modal{
  background:var(--surface);border-radius:var(--rxl);
  width:100%;max-width:680px;
  box-shadow:0 24px 80px rgba(24,22,15,.18);
  animation:mslide .25s ease;margin:auto;
}
@keyframes mslide{from{transform:translateY(16px);opacity:0}to{transform:none;opacity:1}}
.modal-head{
  display:flex;align-items:center;justify-content:space-between;
  padding:1.25rem 1.5rem;border-bottom:1px solid var(--border);
}
.modal-head h3{font-family:'Syne',sans-serif;font-size:18px;font-weight:700}
.modal-close{
  width:30px;height:30px;border-radius:50%;
  border:1px solid var(--border2);background:transparent;
  font-size:16px;color:var(--ink2);
  display:flex;align-items:center;justify-content:center;
  transition:background .14s;
}
.modal-close:hover{background:var(--surf2)}
.modal-body{padding:1.5rem}
.modal-foot{
  padding:1rem 1.5rem;border-top:1px solid var(--border);
  display:flex;gap:10px;justify-content:flex-end;
}

/* FORM */
.form-row{margin-bottom:1.1rem}
.form-label{font-size:13px;font-weight:500;color:var(--ink2);margin-bottom:5px;display:block}
.form-input,.form-select,.form-textarea{
  width:100%;border:1px solid var(--border2);
  border-radius:var(--r);padding:9px 12px;
  font-size:14px;background:var(--bg);color:var(--ink);
  outline:none;transition:border-color .15s;
}
.form-input:focus,.form-select:focus,.form-textarea:focus{border-color:var(--accent)}
.form-textarea{resize:vertical;min-height:68px}
.form-row-2{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.opts-row{display:grid;grid-template-columns:1fr 1fr 1fr;gap:8px;margin-top:8px}
.opts-wrap{display:flex;flex-direction:column;gap:6px;margin:8px 0}
.opt-row{display:grid;grid-template-columns:76px 1fr 28px;align-items:center;gap:8px}
.opt-num{font-size:11px;font-weight:500;color:var(--ink3)}
.btn-add-opt{
  display:inline-flex;align-items:center;gap:4px;
  padding:5px 12px;border-radius:var(--r);
  border:1px dashed var(--border2);background:transparent;
  color:var(--ink3);font-size:12px;margin-bottom:8px;
  transition:border-color .14s,color .14s;
}
.btn-add-opt:hover{border-color:var(--accent);color:var(--accent)}
.btn-rm-opt{
  width:28px;height:34px;border-radius:var(--r);
  border:1px solid var(--border2);background:transparent;
  color:var(--red);font-size:11px;line-height:1;
  transition:background .14s;
}
.btn-rm-opt:hover{background:var(--red);color:#fff;border-color:var(--red)}

/* Q-EDITOR */
.q-editor{
  background:var(--bg);border:1px solid var(--border);
  border-radius:var(--rlg);padding:1rem;margin-bottom:10px;
}
.q-editor-head{
  display:flex;align-items:center;justify-content:space-between;
  margin-bottom:10px;
}
.q-editor-num{font-size:12px;font-weight:500;color:var(--ink3)}
.btn-rm-q{
  padding:3px 10px;border-radius:var(--r);
  border:1px solid var(--border2);background:transparent;
  font-size:11px;color:var(--red);
}
.btn-rm-q:hover{background:var(--red);color:#fff;border-color:var(--red)}
.btn-add-q{
  display:block;width:100%;
  padding:9px;border-radius:var(--r);
  border:1px dashed var(--border2);background:transparent;
  color:var(--ink3);font-size:13px;
  margin-top:8px;transition:border-color .14s,color .14s;
}
.btn-add-q:hover{border-color:var(--accent);color:var(--accent)}
.btn-cancel{
  padding:9px 20px;border-radius:var(--r);
  border:1px solid var(--border2);background:transparent;
  font-size:14px;font-weight:500;color:var(--ink2);
}
.btn-save{
  padding:9px 24px;border-radius:var(--r);
  border:none;background:var(--accent);color:#fff;
  font-size:14px;font-weight:500;
  transition:background .15s;
}
.btn-save:hover{background:var(--accent-dk)}

@media(max-width:540px){
  .form-row-2,.opts-row{grid-template-columns:1fr}
}