.r4agt{--navy:#0d2855;--blue:#1f5fae;--ink:#172033;--muted:#66778d;--line:#dbe5ef;--soft:#f5f8fc;--green:#167046;direction:rtl;color:var(--ink);font-family:Tahoma,Arial,sans-serif;border:1px solid var(--line);border-radius:20px;background:#fff;overflow:hidden;box-shadow:0 8px 28px rgba(13,40,85,.06);margin:24px 0}
.r4agt *{box-sizing:border-box}.r4agt button,.r4agt select{font:inherit}.r4agt-head{padding:24px clamp(16px,3vw,28px);background:linear-gradient(135deg,#f7faff,#eef5ff);border-bottom:1px solid var(--line)}
.r4agt-kicker{display:inline-flex;padding:5px 10px;border-radius:999px;background:#e5eefb;color:var(--navy);font-size:12px;font-weight:800;margin-bottom:8px}.r4agt-head h2{margin:0 0 7px;color:var(--navy);font-size:clamp(22px,3vw,29px);line-height:1.45}.r4agt-head p{margin:0;color:#53657c;line-height:1.85;font-size:15px}
.r4agt-body{padding:clamp(16px,3vw,26px)}.r4agt-memory{display:flex;gap:8px;flex-wrap:wrap;align-items:center;padding:13px;border:1px solid #cfe0f3;background:#f8fbff;border-radius:14px;margin-bottom:18px}.r4agt-memory strong{color:var(--navy)}.r4agt-memory span{padding:5px 9px;border-radius:999px;background:#fff;border:1px solid #dce6f1;color:#42566f;font-size:13px}
.r4agt-step{display:flex;align-items:center;gap:8px;color:var(--navy);font-size:19px;margin:18px 0 10px}.r4agt-step b{display:inline-flex;align-items:center;justify-content:center;width:28px;height:28px;border-radius:50%;background:var(--navy);color:#fff;font-size:14px}
.r4agt-choice-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px}.r4agt-choice-grid.aspect{grid-template-columns:repeat(2,minmax(0,1fr))}.r4agt-choice{appearance:none;border:1px solid var(--line);background:#fff;border-radius:13px;padding:13px;text-align:right;cursor:pointer;color:var(--ink);min-height:88px;transition:.15s ease}.r4agt-choice:hover{border-color:#95b5dc;transform:translateY(-1px)}.r4agt-choice.active{border-color:var(--blue);box-shadow:0 0 0 3px rgba(31,95,174,.10);background:#f8fbff}.r4agt-choice strong{display:block;color:var(--navy);font-size:15px;margin-bottom:4px}.r4agt-choice span{display:block;color:var(--muted);font-size:12px;line-height:1.7}
.r4agt-result{margin-top:17px;border:1px solid var(--line);border-radius:15px;background:#fff;min-height:105px;overflow:hidden}.r4agt-placeholder{padding:22px;color:var(--muted);text-align:center}.r4agt-result-card{padding:18px}.r4agt-result-top{display:flex;align-items:flex-start;justify-content:space-between;gap:12px;flex-wrap:wrap}.r4agt-result-top h3{margin:0;color:var(--navy);font-size:22px}.r4agt-russian{direction:ltr;text-align:left;font:800 20px/1.5 Arial,sans-serif;color:#12376f}.r4agt-pill{display:inline-flex;padding:5px 9px;border-radius:999px;background:#eaf2fc;color:var(--navy);font-size:12px;font-weight:800}.r4agt-explain{margin-top:12px;color:#43566e;line-height:1.9}.r4agt-rule{margin-top:12px;padding:12px 14px;border-right:4px solid var(--blue);border-radius:10px;background:#f6faff}.r4agt-rule strong{color:var(--navy)}.r4agt-example{margin-top:12px;display:grid;grid-template-columns:1fr 1fr;gap:10px}.r4agt-example>div{border:1px solid #e2e9f2;border-radius:10px;padding:11px}.r4agt-example .ru{direction:ltr;text-align:left;font:700 18px/1.6 Arial,sans-serif}.r4agt-example .ar{color:#51647c;line-height:1.8}.r4agt-case-list{margin:12px 0 0;padding:0 18px 0 0;color:#4a5d73}.r4agt-case-list li{margin:5px 0}
.r4agt-form-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-bottom:13px}.r4agt-form-grid.one{grid-template-columns:1fr}.r4agt label{display:block;font-weight:800;color:var(--navy);margin-bottom:6px}.r4agt select{width:100%;min-height:46px;border:1px solid #bdcbdc;border-radius:10px;padding:9px 11px;background:#fff;color:var(--ink);font-size:16px}.r4agt-primary,.r4agt-actions button{border:0;border-radius:999px;background:var(--navy);color:#fff;padding:10px 18px;font-weight:800;cursor:pointer}.r4agt-primary{margin-top:3px}.r4agt-actions button.sec{background:#eaf1fb;color:var(--navy)}
.r4agt-note{margin-top:15px;padding:13px;border:1px dashed #bdcee3;border-radius:12px;background:#fbfdff}.r4agt-note strong{display:block;color:var(--navy);margin-bottom:6px}.r4agt-note span{display:inline-block;margin-left:12px;color:#52657d}.r4agt-note b{direction:ltr;display:inline-block}
.r4agt-quiz{margin-top:18px;padding:14px;border:1px solid var(--line);border-radius:14px;background:#fafcff;display:flex;justify-content:space-between;gap:14px;align-items:center}.r4agt-quiz strong{display:block;color:var(--navy);margin-top:3px}.r4agt-quiz [data-case-quiz-a]{display:none;color:var(--green);font-weight:800;margin-top:7px}.r4agt-quiz [data-case-quiz-a].show{display:block}.r4agt-mini{font-size:12px;color:var(--muted)}.r4agt-actions{display:flex;gap:8px;flex-wrap:wrap}
.r4agt-verdict{display:flex;align-items:center;gap:9px;margin-bottom:8px}.r4agt-verdict .icon{width:36px;height:36px;border-radius:50%;display:flex;align-items:center;justify-content:center;background:#eaf2fc;color:var(--navy);font-weight:900}.r4agt-verdict .label{font-size:13px;color:var(--muted)}.r4agt-verdict .answer{font-weight:900;color:var(--navy);font-size:19px}
.r4agt button:focus-visible,.r4agt select:focus-visible{outline:3px solid rgba(31,95,174,.2);outline-offset:2px}
@media(max-width:820px){.r4agt-choice-grid,.r4agt-choice-grid.aspect{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:640px){.r4agt{border-radius:16px}.r4agt-head{padding:18px 15px}.r4agt-head h2{font-size:21px}.r4agt-body{padding:14px}.r4agt-memory{align-items:stretch}.r4agt-memory strong{width:100%}.r4agt-memory span{flex:1 1 calc(50% - 8px);text-align:center;font-size:12px}.r4agt-choice-grid,.r4agt-choice-grid.aspect,.r4agt-form-grid,.r4agt-example{grid-template-columns:1fr}.r4agt-choice{min-height:0}.r4agt-result-top{display:block}.r4agt-russian{margin-top:8px}.r4agt-quiz{display:block}.r4agt-actions{display:grid;grid-template-columns:1fr 1fr;margin-top:12px}.r4agt-actions button{width:100%}.r4agt-primary{width:100%;min-height:46px}.r4agt-note span{display:block;margin:6px 0}.r4agt-result-card{padding:15px}}
@media(max-width:380px){.r4agt-memory span{flex-basis:100%}.r4agt-actions{grid-template-columns:1fr}}

/* v1.2.0 — mobile accordion result for grammatical cases */
.r4agt-inline-result{grid-column:1/-1;margin:0 0 4px!important;border-top:0}
.r4agt-choice[aria-expanded="true"]{border-color:var(--blue);background:#f3f8ff;box-shadow:0 0 0 3px rgba(31,95,174,.10)}
.r4agt-choice[aria-expanded="true"]::after{content:'⌃';float:left;color:var(--blue);font-weight:900}
@media(max-width:640px){
  .r4agt-choice-grid{display:grid;grid-template-columns:1fr!important;gap:8px}
  .r4agt-choice{min-height:58px;padding:12px 13px}
  .r4agt-inline-result{margin-top:-2px!important;border-radius:0 0 13px 13px}
  .r4agt-choice.active{border-radius:13px 13px 0 0}
}

/* v1.3.0 — consistent inline answers and improved mobile ergonomics */
.r4agt-choice{position:relative}
.r4agt-choice[aria-expanded="true"]{border-radius:13px 13px 0 0;background:#f3f8ff}
.r4agt-choice[aria-expanded="true"]::after{content:'⌃';position:absolute;left:13px;top:50%;transform:translateY(-50%);color:var(--blue);font-weight:900}
.r4agt-inline-result{box-shadow:0 8px 22px rgba(13,40,85,.055)}
@media(max-width:640px){
  .r4agt{margin:16px 0!important;border-radius:16px!important}
  .r4agt-head{padding:15px 14px!important}.r4agt-kicker{font-size:11px!important}.r4agt-head h2{font-size:20px!important}.r4agt-head p{font-size:13px!important;line-height:1.65!important}
  .r4agt-body{padding:12px!important}.r4agt-step{font-size:16px!important;margin:14px 0 9px!important}
  .r4agt-choice{min-height:62px!important;padding:11px 42px 11px 12px!important;border-radius:12px!important}
  .r4agt-choice strong{font-size:14px!important}.r4agt-choice span{font-size:11px!important;line-height:1.55!important}
  .r4agt-choice.active{border-radius:12px 12px 0 0!important}
  .r4agt-inline-result{margin:-1px 0 3px!important;border-radius:0 0 12px 12px!important}
  .r4agt-result-card{padding:13px!important}.r4agt-result-top h3{font-size:19px!important}.r4agt-russian{font-size:18px!important}
  .r4agt-rule,.r4agt-explain{font-size:13px!important;line-height:1.75!important}.r4agt-example .ru{font-size:16px!important}.r4agt-example .ar{font-size:13px!important}
}


/* v1.3.2 — branded app-mode selector sheet. Website shortcodes retain their
   native controls; only the Flutter standalone grammar screen is transformed. */
body.r4a-app-tool-grammar .r4agt-native-select-hidden{position:absolute!important;width:1px!important;height:1px!important;opacity:0!important;pointer-events:none!important;overflow:hidden!important}
body.r4a-app-tool-grammar .r4agt-select-trigger{display:flex;align-items:center;justify-content:space-between;gap:10px;width:100%;min-height:50px;padding:10px 12px;border:1px solid #bdcbdc;border-radius:11px;background:#fff;color:#172033;text-align:right;font:inherit;cursor:pointer}body.r4a-app-tool-grammar .r4agt-select-trigger>b{color:#0b4f8f;font-size:18px}
.r4agt-picker-backdrop{position:fixed;inset:0;z-index:2147483200;background:rgba(7,30,58,.48);display:flex;align-items:flex-end;justify-content:center;padding-top:12vh;backdrop-filter:blur(3px);direction:rtl}.r4agt-picker-sheet{width:min(100%,680px);max-height:76dvh;background:#fff;border-radius:22px 22px 0 0;box-shadow:0 -16px 46px rgba(8,38,72,.24);overflow:hidden;display:flex;flex-direction:column}.r4agt-picker-head{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:15px 16px;background:linear-gradient(135deg,#0b376d,#0b5fa9);color:#fff}.r4agt-picker-head strong{font-size:16px}.r4agt-picker-head button{width:36px;height:36px;border:0;border-radius:50%;background:rgba(255,255,255,.16);color:#fff;font-size:23px;cursor:pointer}.r4agt-picker-list{padding:9px;overflow:auto;display:grid;gap:6px}.r4agt-picker-option{display:flex;align-items:center;justify-content:space-between;gap:12px;width:100%;min-height:48px;padding:10px 12px;border:1px solid #dbe6f1;border-radius:12px;background:#fff;color:#183d65;text-align:right;font:inherit;font-weight:700}.r4agt-picker-option.selected{background:#edf6ff;border-color:#75a9db;color:#0b4f8f}.r4agt-picker-option b{color:#0b5fa9;font-size:18px}