:root{--saber-green: #00ff41;--saber-green-dim: rgba(0, 255, 65, .15);--saber-red: #ff1744;--saber-red-dim: rgba(255, 23, 68, .15);--saber-white: #f0f0f0;--saber-white-dim: rgba(240, 240, 240, .08);--bg: #000000;--surface: #0a0a0a;--surface-2: #121212;--surface-3: #1a1a1a;--border: #1f1f1f;--ink: #e8e8e8;--muted: #777777;--muted-light: #555555;--shadow-sm: 0 1px 2px rgba(0,0,0,.4);--shadow: 0 1px 4px rgba(0,0,0,.5), 0 2px 8px rgba(0,0,0,.3);--shadow-md: 0 4px 12px rgba(0,0,0,.5), 0 2px 4px rgba(0,0,0,.3);--shadow-lg: 0 8px 24px rgba(0,0,0,.6);--radius: 10px;--radius-lg: 14px;--radius-xl: 18px;--transition: .2s cubic-bezier(.4, 0, .2, 1);font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,Cairo,system-ui,sans-serif;color:var(--ink);background:var(--bg)}[data-theme=light]{--saber-green-dim: rgba(0, 200, 50, .1);--saber-red-dim: rgba(220, 20, 60, .1);--saber-white: #1a2740;--saber-white-dim: rgba(26, 39, 64, .06);--bg: #f0f3f8;--surface: #ffffff;--surface-2: #f4f7fc;--surface-3: #eef1f5;--border: #e2e8f0;--ink: #1a2740;--muted: #6b7a99;--muted-light: #8a98ae;--shadow-sm: 0 1px 2px rgba(0,0,0,.04), 0 1px 4px rgba(0,40,80,.04);--shadow: 0 1px 3px rgba(0,0,0,.05), 0 2px 8px rgba(0,40,80,.06);--shadow-md: 0 4px 12px rgba(0,0,0,.06), 0 2px 4px rgba(0,0,0,.04);--shadow-lg: 0 8px 24px rgba(0,0,0,.08)}[data-theme=light] .fc-face{animation:saber-pulse-light 6s ease infinite}@keyframes saber-pulse-light{0%,to{box-shadow:0 0 4px #00c83226,0 0 8px #00c8320d}33%{box-shadow:0 0 4px #dc143c26,0 0 8px #dc143c0d}66%{box-shadow:0 0 4px #1a274026,0 0 8px #1a27400d}}[data-theme=light] .day-card.done{background:#f0fdf4}[data-theme=light] .day-card.active{background:#fffef5}[data-theme=light] .day-complete-banner{background:#f0fdf4;border-color:var(--saber-green)}[data-theme=light] .builder-result.correct,[data-theme=light] .quiz-result.correct{background:#f0fdf4}[data-theme=light] .builder-result.wrong,[data-theme=light] .quiz-result.wrong{background:#fef2f2}[data-theme=light] 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.dash-progress::-webkit-progress-value{background:linear-gradient(90deg,#16a34a,#1a2740,#dc2626,#16a34a);background-size:300% 100%}[dir=rtl]{font-family:Cairo,Noto Kufi Arabic,Geeza Pro,Arabic Typesetting,-apple-system,BlinkMacSystemFont,Segoe UI,system-ui,sans-serif;line-height:1.65}*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}html,body,#root{height:100%;margin:0}body{background:var(--bg);-webkit-font-smoothing:antialiased;overscroll-behavior:none;padding-top:env(safe-area-inset-top,0);padding-bottom:env(safe-area-inset-bottom,0)}button{font:inherit;cursor:pointer;border:0;background:none;color:inherit;touch-action:manipulation}button:disabled{cursor:not-allowed;opacity:.3}h1,h2,h3,p{margin:0}ul,ol{margin:0;padding-left:1.2em;color:var(--muted)}li{margin:.35em 0}input,select,textarea{font-size:16px}@keyframes saber-sweep{0%{background-position:200% 0}to{background-position:-200% 0}}@keyframes saber-pulse{0%,to{box-shadow:0 0 6px #00ff414d,0 0 12px #00ff411a}33%{box-shadow:0 0 6px #ff17444d,0 0 12px #ff17441a}66%{box-shadow:0 0 6px #f0f0f04d,0 0 12px #f0f0f01a}}@keyframes saber-hum{0%,to{opacity:.8}50%{opacity:1}}.lang-picker{max-width:480px;margin:0 auto;min-height:100vh;padding:48px calc(24px + env(safe-area-inset-right,0)) calc(48px + env(safe-area-inset-bottom,0)) calc(24px + env(safe-area-inset-left,0));display:flex;flex-direction:column;align-items:center;justify-content:center;gap:28px;text-align:center}.lp-logo{display:flex;flex-direction:column;align-items:center;gap:10px}.lp-flag{font-size:48px;line-height:1}.lp-logo h1{font-size:34px;letter-spacing:-.03em;font-weight:800;background:linear-gradient(90deg,#00ff41,#ff1744,#f0f0f0,#00ff41);background-size:300% 100%;-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;animation:saber-sweep 4s linear infinite}.lp-tag{color:var(--muted);font-size:15px;margin-top:2px}.lp-prompt{font-size:16px;font-weight:500;color:var(--muted)}.lp-options{display:flex;gap:12px;width:100%}.lp-card{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:10px;flex:1;min-height:110px;background:var(--surface);padding:22px 20px;border-radius:var(--radius-lg);border:1.5px solid var(--border);transition:border-color var(--transition),box-shadow var(--transition),transform var(--transition)}.lp-card:hover{border-color:#333;box-shadow:var(--shadow)}.lp-card.sel{border-color:var(--saber-white);box-shadow:0 0 8px var(--saber-white-dim)}.lp-card .lp-flag{font-size:32px}.lp-card .lp-label{font-size:17px;font-weight:700;color:var(--ink)}.lp-start{background:var(--surface-2);color:var(--saber-white);padding:14px 44px;border-radius:999px;font-size:17px;font-weight:700;border:1.5px solid var(--saber-white);box-shadow:0 0 10px var(--saber-white-dim),0 0 20px var(--saber-white-dim);transition:box-shadow var(--transition),border-color var(--transition)}.lp-start:not(:disabled):hover{box-shadow:0 0 16px var(--saber-white-dim),0 0 30px var(--saber-white-dim);border-color:#fff}.lp-start:disabled{border-color:var(--border);box-shadow:none;color:var(--muted-light)}.dash{max-width:980px;margin:0 auto;padding:28px calc(24px + env(safe-area-inset-right,0)) 28px calc(24px + env(safe-area-inset-left,0))}.dash-header{display:flex;justify-content:space-between;align-items:flex-start;flex-wrap:wrap;gap:12px;margin-bottom:6px}.dash-header h1{font-size:24px;font-weight:800;letter-spacing:-.02em;background:linear-gradient(90deg,#00ff41,#ff1744,#f0f0f0,#00ff41);background-size:300% 100%;-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;animation:saber-sweep 4s linear infinite}.dash-sub{color:var(--muted);font-size:13px;font-weight:500;margin-top:2px}.dash-sub code{font-family:SF Mono,Fira 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var(--transition),box-shadow var(--transition),transform var(--transition)}.day-card:hover{transform:translateY(-2px);box-shadow:var(--shadow);border-color:#333}.day-card.done{border-color:#00ff41;box-shadow:0 0 6px #00ff411a}.day-card.active{border-color:var(--saber-white)}.day-card.locked{opacity:.35}.day-card-top{display:flex;justify-content:space-between;align-items:center}.day-num{font-weight:700;font-size:13px;font-family:SF Mono,Fira Code,monospace;color:var(--muted)}.badge{font-size:10px;padding:1px 7px;border-radius:999px;font-weight:700;font-family:SF Mono,Fira Code,monospace;background:var(--surface-3);color:var(--muted)}.badge.ok{background:#00ff411f;color:var(--saber-green)}.badge.score{background:#f0f0f01a;color:var(--saber-white)}.badge.prog{background:#ff17441f;color:var(--saber-red)}.theme{margin:10px 0 6px;font-weight:700;font-size:14px;line-height:1.35;color:var(--ink)}.day-meta{color:var(--muted);font-size:11px;font-weight:500;font-family:SF Mono,Fira 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var(--transition),transform var(--transition);position:relative}.menu-item.done{border-color:var(--saber-green);box-shadow:0 0 6px #00ff4114}.menu-item:hover{transform:translateY(-2px);box-shadow:var(--shadow);border-color:#333}.menu-icon{font-size:28px;line-height:1}.menu-label{font-weight:700;font-size:14px}.menu-done{position:absolute;top:8px;right:10px;color:var(--saber-green);font-size:14px;font-weight:700}.day-complete-banner{margin-top:24px;padding:16px 22px;background:var(--surface-2);border:1.5px solid var(--saber-green);color:var(--saber-green);border-radius:var(--radius-lg);display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:12px;font-weight:700;font-size:15px;box-shadow:0 0 12px #00ff4114}.sectioned .day-bar{display:flex;align-items:center;justify-content:space-between;padding:10px 0;margin-bottom:6px;border-bottom:1px solid var(--border)}.day-bar-theme{color:var(--muted);font-size:13px;font-style:italic;font-weight:500}.sec{background:var(--surface);border-radius:var(--radius-lg);box-shadow:var(--shadow-sm);padding:24px;margin-bottom:20px;border:1px solid var(--border)}.sec-title{font-size:17px;margin-bottom:18px;display:flex;justify-content:space-between;align-items:center;font-weight:700;color:var(--ink)}.sec-title span{color:var(--muted);font-weight:600}.counter{background:var(--surface-3);color:var(--muted);font-size:11px;font-weight:700;font-family:SF Mono,Fira Code,monospace;padding:3px 11px;border-radius:999px}.grammar-summary{color:var(--muted);margin-bottom:14px;font-style:italic;line-height:1.6}.grammar-body{margin-bottom:16px;line-height:1.7}.grammar-examples,.grammar-tips{background:var(--surface-2);border-radius:var(--radius);padding:16px 20px;margin:14px 0;border:1px solid var(--border)}.grammar-examples h3,.grammar-tips 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#222;background:var(--surface);box-shadow:0 0 8px #f0f0f00a;display:flex;flex-direction:column;align-items:center;justify-content:center;animation:saber-pulse 6s ease infinite}.fc-front{z-index:2}.fc-back{transform:rotateY(180deg);background:linear-gradient(135deg,var(--surface),var(--surface-2))}.fc-sv{font-size:30px;font-weight:800;color:var(--ink);margin-bottom:6px;letter-spacing:-.01em}.fc-ipa{color:var(--muted);font-family:SF Mono,Fira Code,monospace;font-size:14px;margin-bottom:4px}.fc-class{font-size:12px;color:var(--muted-light);text-transform:none;font-weight:500;font-family:SF Mono,Fira Code,monospace}.fc-hint{margin-top:16px;color:var(--muted-light);font-size:13px;font-weight:500;animation:saber-hum 2s ease infinite}.fc-gloss{font-size:22px;font-weight:700;margin-bottom:14px;color:var(--ink)}.fc-example{background:var(--surface-2);border-radius:var(--radius);padding:14px 16px;margin:14px 0 0;text-align:start;border:1px solid var(--border);width:100%}.fc-ex-sv{font-weight:600;font-size:14px;color:var(--ink);display:flex;justify-content:space-between;align-items:center;gap:8px}.fc-ex-tr{color:var(--muted);margin-top:3px;font-size:14px}.fc-also{margin-top:14px}.flash-actions{display:flex;gap:10px;justify-content:center;flex-wrap:wrap;margin-top:6px}.grade{padding:10px 18px;border-radius:999px;font-weight:700;font-size:13px;background:var(--surface-2);border:1.5px solid var(--border);transition:border-color var(--transition),transform var(--transition)}.grade:hover{transform:translateY(-1px)}.grade.forgot{background:#ff17441a;color:var(--saber-red);border-color:transparent}.grade.forgot:hover{border-color:var(--saber-red);box-shadow:0 0 8px #ff174426}.grade.hard{background:#ffffff0a;color:var(--muted);border-color:transparent}.grade.hard:hover{border-color:#444}.grade.good{background:#00ff4114;color:var(--saber-green);border-color:transparent}.grade.good:hover{border-color:var(--saber-green);box-shadow:0 0 8px #00ff411f}.grade.easy{background:#f0f0f00f;color:var(--saber-white);border-color:transparent}.grade.easy:hover{border-color:var(--saber-white);box-shadow:0 0 8px #f0f0f01a}.btn-primary{background:transparent;color:var(--saber-white);padding:10px 24px;border-radius:999px;font-weight:700;font-size:14px;border:1.5px solid var(--saber-white);box-shadow:0 0 8px #f0f0f01a;transition:box-shadow var(--transition),border-color var(--transition),background var(--transition)}.btn-primary:hover{box-shadow:0 0 16px #f0f0f033;border-color:#fff;background:#f0f0f00a}.btn-secondary{background:var(--surface-2);color:var(--ink);padding:10px 24px;border-radius:999px;font-weight:700;font-size:14px;border:1px solid var(--border);transition:background var(--transition),border-color var(--transition)}.btn-secondary:hover{background:var(--surface-3);border-color:#333}.audio-btn{background:var(--surface-3);color:var(--muted);padding:4px 12px;border-radius:999px;font-size:12px;font-weight:600;border:1px solid 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var(--border);font-size:16px;margin-bottom:16px;transition:border-color var(--transition),box-shadow var(--transition);background:var(--surface-2);color:var(--ink)}.quiz-input:focus{border-color:#444;box-shadow:0 0 0 3px #ffffff0a;outline:none}.quiz-input::placeholder{color:var(--muted-light)}@media (max-width: 540px){.day{padding:16px env(safe-area-inset-right,16px) 80px env(safe-area-inset-left,16px)}.dash{padding:20px env(safe-area-inset-right,16px) 80px env(safe-area-inset-left,16px)}.day-grid{grid-template-columns:repeat(2,1fr);gap:10px}.day-card{padding:14px;min-height:84px}.dash-header{flex-direction:column;align-items:stretch}.dash-actions .btn-ghost{min-height:40px}.fc-sv{font-size:22px}.fc-face{padding:28px 18px;min-height:200px}.flashcard,.flashcard-inner,.fc-face{min-height:200px}.lang-picker{padding:36px env(safe-area-inset-right,20px) env(safe-area-inset-bottom,24px) 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.fc-ipa{direction:ltr;display:inline-block}[dir=rtl] .menu-item.done .menu-done{right:auto;left:10px}