:root{--kurs-violet-500:#7c6bf0;--kurs-violet-600:#5b4dc4;--kurs-violet-700:#43389b;--kurs-lilac-100:#efecfc;--kurs-lilac-200:#e6e2f5;--kurs-lilac-300:#dcd7f2;--kurs-lilac-400:#d6cff7;--kurs-lilac-500:#a99af0;--kurs-lilac-600:#c9c1f5;--kurs-ink-900:#2e2a3d;--kurs-ink-700:#4a4560;--kurs-ink-600:#5f5a78;--kurs-ink-500:#6f6a86;--kurs-ink-400:#a49fbb;--kurs-ink-disabled:#5b5478;--kurs-gray-50:#f8f8fa;--kurs-gray-100:#edeef4;--kurs-gray-200:#dcdee8;--kurs-green-500:#3fb98f;--kurs-green-600:#2f9070;--kurs-green-100:#e4f7f0;--kurs-green-800:#1d6b53;--kurs-mint-300:#a0e8d6;--kurs-mint-400:#78beaf;--kurs-mint-800:#1d5a4b;--kurs-red-400:#ff6b85;--kurs-red-500:#d5546c;--kurs-red-50:#fff0f3;--kurs-red-700:#c2566d;--kurs-red-800:#c21f30;--kurs-pink-300:#ff8fa3;--kurs-pink-200:#ffcdd6;--kurs-yellow-300:#ffde59;--kurs-yellow-500:#d4b73a;--kurs-yellow-900:#4a3b00;--kurs-yellow-50:#fff6e3;--kurs-yellow-800:#8a6516;--kurs-white:#fff;--case-nominatif:#fff;--case-nominatif-ring:#2e2a3d59;--case-genitif:#2e2a3d;--case-datif:#1e9e63;--case-accusatif:#d92b3a;--case-instrumental:#e8b900;--case-prepositionnel:#1b6fc4;--bg-screen:var(--kurs-gray-50);--surface-card:var(--kurs-white);--surface-lilac:var(--kurs-lilac-100);--surface-filled:var(--kurs-violet-600);--surface-filled-shadow:var(--kurs-violet-700);--surface-gradient:linear-gradient(170deg,#7c6bf0,#5b4dc4);--text-primary:var(--kurs-ink-900);--text-secondary:var(--kurs-ink-500);--text-on-lilac:var(--kurs-ink-700);--text-muted:var(--kurs-ink-600);--text-link:var(--kurs-violet-600);--text-on-filled:#fff;--accent:var(--kurs-violet-500);--accent-shadow:var(--kurs-violet-600);--track:var(--kurs-lilac-200);--disabled-bg:var(--kurs-lilac-300);--disabled-fg:var(--kurs-ink-disabled);--success:var(--kurs-green-500);--success-shadow:var(--kurs-green-600);--success-bg:var(--kurs-green-100);--success-fg:var(--kurs-green-800);--done:var(--kurs-mint-300);--done-shadow:var(--kurs-mint-400);--done-fg:var(--kurs-mint-800);--error:var(--kurs-red-400);--error-shadow:var(--kurs-red-500);--error-bg:var(--kurs-red-50);--error-fg:var(--kurs-red-700);--heart:var(--kurs-pink-300);--heart-count:var(--kurs-red-800);--accent-on-filled:var(--kurs-yellow-300);--accent-on-filled-fg:var(--kurs-yellow-900);--accent-on-filled-shadow:var(--kurs-yellow-500);--border-card:#2e2a3d14;--border-hairline:#2e2a3d17;--connector:#2e2a3d1f;--locked:var(--kurs-gray-100);--locked-shadow:var(--kurs-gray-200)}[data-theme=dark]{--kurs-gray-50:#17151f;--kurs-gray-100:#2c2940;--kurs-gray-200:#1f1d2e;--bg-screen:#17151f;--surface-card:#23202e;--surface-lilac:#2c2840;--surface-filled:#5b4dc4;--surface-filled-shadow:#3a3190;--text-primary:#f3f1f8;--text-secondary:#a9a4bf;--text-on-lilac:#d9d3f5;--text-muted:#8b85a6;--text-link:#a99af0;--track:#302c42;--disabled-bg:#35304a;--disabled-fg:#8b85a6;--success-bg:#17322b;--success-fg:#8fe3c4;--done:#a0e8d6;--done-shadow:#5e9e90;--done-fg:#123f33;--error-bg:#3a1f27;--error-fg:#ff9db0;--border-card:#ffffff14;--border-hairline:#ffffff14;--connector:#ffffff1f;--locked:#2c2940;--locked-shadow:#1f1d2e;--kurs-ink-400:#6d6886;--shadow-card:0 4px 0 #00000059;--shadow-phone:0 14px 34px #00000080;--heat:#2c2840;--kurs-lilac-400:#4a4272;--kurs-lilac-500:#7c6bf0}:root{--font-sans:var(--font-nunito),system-ui,-apple-system,"Segoe UI",sans-serif;--weight-body:600;--weight-strong:700;--weight-heavy:800;--text-screen-title:800 23px/1.15 var(--font-sans);--text-exercise-title:800 19px/1.25 var(--font-sans);--text-hero-word:800 30px/1.2 var(--font-sans);--text-card-title:800 14.5px/1.25 var(--font-sans);--text-body:600 13px/1.5 var(--font-sans);--text-helper:600 12.5px/1.45 var(--font-sans);--text-section-label:800 11px/1 var(--font-sans);--tracking-section:.12em;--text-chip:700 17px/1.2 var(--font-sans);--text-button:800 15px/1.2 var(--font-sans);--text-tab:800 9.5px/1 var(--font-sans);--text-transcription:600 12.5px/1.3 var(--font-sans);--text-pill:800 10.5px/1 var(--font-sans);--tracking-pill:.1em;--space-1:4px;--space-2:8px;--space-3:12px;--space-4:16px;--space-5:20px;--space-6:24px;--screen-gutter:22px;--card-gap:10px;--card-pad:14px;--button-pad-y:17px;--button-margin-bottom:30px;--radius-phone:40px;--radius-card:20px;--radius-card-sm:18px;--radius-button:20px;--radius-chip:14px;--radius-tile:13px;--radius-pill:8px;--radius-bar:6px;--radius-input:18px;--tab-icon:22px;--node-done:54px;--node-active:78px;--icon-tile:40px;--shadow-button:0 5px 0 var(--accent-shadow);--shadow-button-pressed:0 1px 0 var(--accent-shadow);--shadow-card:0 4px 0 #2e2a3d12;--shadow-card-selected:0 4px 0 var(--accent);--shadow-success:0 5px 0 var(--success-shadow);--shadow-error:0 5px 0 var(--error-shadow);--shadow-yellow:0 5px 0 var(--accent-on-filled-shadow);--shadow-filled-card:0 5px 0 var(--surface-filled-shadow);--shadow-done:0 5px 0 var(--done-shadow);--shadow-phone:0 14px 34px #5a46a02e;--press-translate:4px;--ease-press:.12s ease;--halo-mic:0 0 0 10px #7c6bf029}body{background:var(--bg-screen);color:var(--text-primary);font:var(--text-body);-webkit-font-smoothing:antialiased;margin:0}a{color:var(--text-link);font-weight:800;text-decoration:none}a:hover{color:var(--kurs-violet-500)}.kurs-card{background:var(--surface-card);border:2px solid var(--border-card);border-radius:var(--radius-card);box-shadow:var(--shadow-card)}.kurs-btn{text-align:center;padding:var(--button-pad-y);border-radius:var(--radius-button);font:var(--text-button);color:#fff;background:var(--accent);box-shadow:var(--shadow-button);cursor:pointer;user-select:none;transition:transform var(--ease-press),box-shadow var(--ease-press);display:block}.kurs-btn:active{transform:translateY(var(--press-translate));box-shadow:var(--shadow-button-pressed)}.kurs-btn[data-state=disabled]{background:var(--disabled-bg);color:var(--disabled-fg);box-shadow:none}.kurs-btn[data-state=success]{background:var(--success);box-shadow:var(--shadow-success)}.kurs-btn[data-state=error]{background:var(--error);box-shadow:var(--shadow-error)}.kurs-btn[data-variant=secondary]{background:var(--surface-card);color:var(--text-link);box-shadow:var(--shadow-card);border:2px solid #2e2a3d1a}.kurs-btn[data-variant=yellow]{background:var(--accent-on-filled);color:var(--accent-on-filled-fg);box-shadow:var(--shadow-yellow)}.kurs-btn[data-variant=white]{color:var(--kurs-violet-600);background:#fff;box-shadow:0 5px #0000002e}.kurs-pill{border-radius:var(--radius-pill);font:var(--text-pill);letter-spacing:var(--tracking-pill);background:var(--accent-on-filled);color:var(--accent-on-filled-fg);padding:4px 8px;display:inline-block}.kurs-helper{background:var(--surface-lilac);border-radius:var(--radius-card-sm);font:var(--text-helper);color:var(--text-on-lilac);align-items:flex-start;gap:11px;padding:13px 15px;display:flex}.kurs-helper>i{background:var(--accent);color:#fff;width:26px;height:26px;font:800 13px var(--font-sans);border-radius:50%;flex:none;justify-content:center;align-items:center;font-style:normal;display:flex}.kurs-track{background:var(--track);border-radius:var(--radius-bar);height:12px;overflow:hidden}.kurs-track>span{background:var(--accent);border-radius:var(--radius-bar);height:100%;display:block}.kurs-icon-ph{width:var(--tab-icon);height:var(--tab-icon);opacity:.55;border:1.5px dashed;border-radius:7px;display:block}.kurs-section-label{font:var(--text-section-label);letter-spacing:var(--tracking-section);color:var(--text-secondary);text-transform:uppercase}:root{--nav-h:64px;--course-nav-h:52px;--page-max:1280px;--gutter:48px}*{box-sizing:border-box}html{scrollbar-gutter:stable;scroll-behavior:smooth;scroll-padding-top:calc(var(--nav-h) + var(--course-nav-h) + 12px)}body{font:var(--text-body)}.wrap{max-width:var(--page-max);padding:0 var(--gutter);margin:0 auto}.sr-only{clip:rect(0 0 0 0);white-space:nowrap;width:1px;height:1px;position:absolute;overflow:hidden}.gnav{z-index:30;height:var(--nav-h);background:var(--surface-card);border-bottom:1px solid var(--border-hairline);position:sticky;top:0}.gnav .wrap{align-items:center;gap:26px;height:100%;display:flex}.gnav .logo{font:800 22px var(--font-sans);color:var(--kurs-violet-600);text-decoration:none;position:relative;top:-1px}.gnav .links{align-items:center;gap:26px;display:flex}.gnav .links a.always{display:none}.gnav .links a,.gnav .links summary{font:800 13.5px var(--font-sans);color:var(--text-muted);cursor:pointer;text-decoration:none;list-style:none}.gnav .links summary::-webkit-details-marker{display:none}.gnav .links a:hover,.gnav .links summary:hover{color:var(--kurs-violet-600)}.gnav .spacer{flex:1}.gnav .sitelang>summary{font:700 13px var(--font-sans);color:var(--text-muted);cursor:pointer;transition:color var(--ease-press), border-color var(--ease-press);border:1.5px solid #2e2a3d1f;border-radius:10px;align-items:center;gap:4px;padding:6px 10px;list-style:none;display:inline-flex}.gnav .sitelang>summary::-webkit-details-marker{display:none}.gnav .sitelang>summary{padding:5px 8px}.gnav .sitelang .globe{width:20px;height:20px;color:inherit;display:block}.gnav .sitelang>summary:hover{color:var(--kurs-violet-600);border-color:var(--kurs-violet-600)}[data-theme=dark] .gnav .sitelang>summary{border-color:var(--border-card)}.gnav .sitelang .panel{width:190px;left:auto;right:0}.gnav .login{font:800 13.5px var(--font-sans);color:var(--kurs-violet-600);transition:background var(--ease-press);border-radius:10px;padding:10px 12px;text-decoration:none}.gnav .login:hover{background:var(--surface-lilac)}.gnav .logo:hover{color:var(--kurs-violet-700,var(--accent-shadow))}.gnav .start{background:var(--accent);color:#fff;font:800 13.5px var(--font-sans);box-shadow:0 4px 0 var(--accent-shadow);transition:background var(--ease-press), box-shadow var(--ease-press);border-radius:16px;padding:11px 20px;text-decoration:none}.gnav .start:hover{background:var(--kurs-violet-600);color:#fff}.langmenu{position:relative}.langmenu .panel{z-index:40;background:var(--surface-card);border:2px solid var(--border-card);border-radius:16px;flex-direction:column;gap:2px;width:220px;padding:8px;display:flex;position:absolute;top:calc(100% + 12px);left:-8px;box-shadow:0 8px 24px #2e2a3d24}.langmenu .panel a{font:700 13px var(--font-sans);color:var(--text-primary);border-radius:10px;justify-content:space-between;padding:9px 12px;display:flex}.langmenu .panel a:hover{background:var(--bg-screen)}.langmenu .panel a[aria-current=page]{background:var(--surface-lilac);color:var(--kurs-violet-600);font-weight:800}.langmenu .panel .all{border-top:1px solid var(--border-card);font:800 12px var(--font-sans);color:var(--kurs-violet-600);border-radius:0;margin-top:2px}.menu-toggle{display:none}.hero{padding:40px 0 24px}.hero .wrap{grid-template-columns:minmax(0,1fr) 520px;align-items:center;gap:40px;display:grid}.eyebrow{background:var(--surface-lilac);color:#4a3f9e;font:800 10.5px var(--font-sans);letter-spacing:.1em;text-transform:uppercase;border-radius:8px;padding:5px 10px;display:inline-block}[data-theme=dark] .eyebrow{color:var(--text-on-lilac)}.hero h1{font:800 48px/1.05 var(--font-sans);text-wrap:balance;color:var(--text-primary);margin:16px 0 0}.hero .lead{font:600 17px/1.5 var(--font-sans);color:var(--text-secondary);max-width:520px;margin-top:16px}.hero .ctas{flex-wrap:wrap;gap:12px;margin-top:26px;display:flex}.btn-primary{background:var(--accent);color:#fff;font:800 16px var(--font-sans);box-shadow:var(--shadow-button);transition:background var(--ease-press), box-shadow var(--ease-press);border-radius:20px;padding:19px 34px 15px;text-decoration:none;display:inline-block}.btn-primary:hover{background:var(--kurs-violet-600);color:#fff}.btn-secondary{background:var(--surface-card);color:var(--kurs-violet-600);font:800 16px var(--font-sans);box-shadow:var(--shadow-card);transition:background var(--ease-press);border:2px solid #2e2a3d1a;border-radius:20px;padding:18px 26px 16px;text-decoration:none;display:inline-block}[data-theme=dark] .btn-secondary{border-color:var(--border-card);color:var(--text-link)}.btn-secondary:hover{background:var(--bg-screen)}.features{grid-template-columns:repeat(3,1fr);gap:14px;max-width:640px;margin-top:36px;display:grid}.feature{border-radius:18px;padding:14px 16px}.feature h3{font:800 14px var(--font-sans);margin:10px 0 0}.feature p{font:600 12px/1.45 var(--font-sans);color:var(--text-secondary);margin:3px 0 0}.demo{height:600px;position:relative}.demo .phone{background:var(--bg-screen);border:8px solid var(--kurs-ink-900);border-radius:36px;flex-direction:column;width:320px;height:540px;display:flex;position:absolute;top:30px;right:0;overflow:hidden;box-shadow:0 20px 40px #2e2a3d33}.demo .bar{align-items:center;gap:12px;padding:20px 18px 14px;display:flex}.demo .bar .x{font:700 15px var(--font-sans);color:var(--text-muted)}.demo .bar .track{background:var(--track);border-radius:5px;flex:1;height:10px;overflow:hidden}.demo .bar .track>i{background:var(--accent);border-radius:5px;width:45%;height:100%;display:block}.demo .bar .hearts{font:700 12px var(--font-sans);color:var(--heart)}.demo .q{font:800 17px var(--font-sans);padding:0 18px}.demo .grid{grid-template-columns:1fr 1fr;gap:9px;margin:12px 18px 0;display:grid}.demo .opt{background:var(--surface-card);border:2px solid var(--border-card);box-shadow:var(--shadow-card);border-radius:16px;padding:9px}.demo .opt.right{border-color:var(--success);box-shadow:0 4px 0 var(--success)}.demo .opt .img{aspect-ratio:1;object-fit:cover;background:var(--surface-lilac);border-radius:11px;width:100%;height:auto;display:block}.demo .opt .cap{font:800 13px var(--font-sans);text-align:center;margin-top:7px}.demo .go{text-align:center;background:var(--success);color:#fff;font:800 14px var(--font-sans);box-shadow:var(--shadow-success);border-radius:18px;margin:auto 18px 22px;padding:14px}.demo .slot{border-radius:22px;width:148px;height:148px;position:absolute;top:0;left:0}.demo .bee{object-fit:contain;background:0 0;border:0}.demo .bubble{background:var(--surface-card);border:2px solid var(--border-card);width:158px;font:800 13px/1.35 var(--font-sans);box-shadow:var(--shadow-card);border-radius:18px 18px 18px 4px;padding:12px 14px;position:absolute;top:174px;left:0}.ph{background:repeating-linear-gradient(45deg,#2e2a3d12 0 6px,#0000 6px 12px);border:1px dashed #2e2a3d38}[data-theme=dark] .ph{background:repeating-linear-gradient(45deg,#ffffff0f 0 6px,#0000 6px 12px);border-color:#ffffff2e}.ph.labelled{text-align:center;font:600 11px/1.4 var(--font-sans);color:var(--text-secondary);justify-content:center;align-items:center;padding:8px;display:flex}.cnav{top:var(--nav-h);z-index:20;height:var(--course-nav-h);background:var(--surface-card);border-top:1px solid var(--border-hairline);border-bottom:1px solid var(--border-hairline);position:sticky}.cnav .wrap{scrollbar-width:none;-ms-overflow-style:none;align-items:center;gap:28px;height:100%;display:flex;overflow:auto hidden}.cnav .wrap::-webkit-scrollbar{display:none}.cnav a{font:800 13px var(--font-sans);color:var(--text-muted);white-space:nowrap;border-bottom:3px solid #0000;padding:16px 0;text-decoration:none}.cnav a:hover,.cnav a[aria-current=true]{color:var(--kurs-violet-600);border-bottom-color:var(--accent)}.section{border-top:1px solid var(--border-hairline);padding:56px 0}.section h2{font:800 30px/1.15 var(--font-sans);text-wrap:balance;margin:0}.section .lead{font:600 15.5px/1.55 var(--font-sans);color:var(--text-secondary);max-width:680px;margin:10px 0 0}.cards{gap:14px;margin-top:26px;display:grid}.cards.c4{grid-template-columns:repeat(4,1fr)}.cards.c3{grid-template-columns:repeat(3,1fr)}.cards.c2{grid-template-columns:repeat(2,1fr)}.card{border-radius:18px;padding:16px 18px}.card .n{background:var(--surface-lilac);width:30px;height:30px;color:var(--kurs-violet-600);font:800 13px var(--font-sans);border-radius:10px;justify-content:center;align-items:center;display:inline-flex}.card h3{font:800 15px/1.3 var(--font-sans);margin:10px 0 0}.card p{font:600 12.5px/1.5 var(--font-sans);color:var(--text-secondary);margin:6px 0 0}.vocab{grid-template-columns:repeat(3,1fr);gap:12px;margin-top:26px;display:grid}.vocab .pair{border-radius:16px;align-items:baseline;gap:12px;padding:12px 16px;display:flex}.vocab .ru{font:800 17px var(--font-sans)}.vocab .own{font:600 13px var(--font-sans);color:var(--text-secondary)}.vocab .note{font:800 10px var(--font-sans);letter-spacing:.06em;text-transform:uppercase;color:var(--kurs-violet-600);background:var(--surface-lilac);white-space:nowrap;border-radius:6px;margin-left:auto;padding:3px 6px}.case{border-left:5px solid var(--case-ink,var(--case-color,var(--accent)))}.case .name{font:800 15px var(--font-sans);align-items:center;gap:8px;display:flex}.case .dot{background:var(--case-ink,var(--case-color));width:12px;height:12px;box-shadow:0 0 0 1.5px var(--case-ring,transparent) inset;border-radius:50%;display:inline-block}.case .ru{font:600 11.5px var(--font-sans);color:var(--text-secondary);margin-left:6px}.case .ex{font:800 17px var(--font-sans);margin-top:8px}.case .gloss{font:600 12.5px/1.45 var(--font-sans);color:var(--text-secondary);margin-top:3px}.levels{grid-template-columns:repeat(4,1fr);gap:14px;margin-top:26px;display:grid}.level{border-radius:18px;padding:16px 18px}.level .code{font:800 22px var(--font-sans);color:var(--kurs-violet-600)}.level .name{font:800 13px var(--font-sans);letter-spacing:.06em;text-transform:uppercase;color:var(--text-secondary);margin-left:8px}.level p{font:600 12.5px/1.5 var(--font-sans);color:var(--text-secondary);margin:8px 0 0}.faq{max-width:760px;margin-top:20px}.faq details{border-top:1px solid var(--border-hairline);padding:14px 0}.faq summary{cursor:pointer;font:800 15px var(--font-sans);justify-content:space-between;gap:12px;list-style:none;display:flex}.faq summary::-webkit-details-marker{display:none}.faq summary:after{content:"+";color:var(--kurs-violet-600);font-weight:800}.faq details[open] summary:after{content:"–"}.faq p{font:600 13.5px/1.55 var(--font-sans);color:var(--text-secondary);max-width:640px;margin:8px 0 0}.cta-band{background:var(--surface-gradient);color:#fff;border-radius:24px;justify-content:space-between;align-items:center;gap:24px;margin:24px 0 56px;padding:32px;display:flex}.cta-band h2{font:800 24px/1.2 var(--font-sans);color:#fff;margin:0}.cta-band .btn-yellow{background:var(--accent-on-filled);color:var(--accent-on-filled-fg);font:800 15px var(--font-sans);box-shadow:var(--shadow-yellow);white-space:nowrap;transition:background var(--ease-press);border-radius:18px;padding:15px 28px;text-decoration:none}.cta-band 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