:root{--gold:#f59e0b;--gold-dark:#d97706;--bg:#0a0a0a;--bg-card:#1a1a1a;--bg-input:#262626;--text:#fafafa;--text-muted:#a3a3a3;--green:#22c55e;--red:#ef4444;--blue:#3b82f6}*{margin:0;padding:0;box-sizing:border-box}body,html{background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,SF Pro Display,Segoe UI,sans-serif;-webkit-font-smoothing:antialiased;min-height:100dvh;overflow-x:hidden}body{padding:env(safe-area-inset-top) env(safe-area-inset-right) env(safe-area-inset-bottom) env(safe-area-inset-left)}.container{max-width:480px;margin:0 auto;padding:16px;min-height:100dvh;display:flex;flex-direction:column}.header{display:flex;align-items:center;justify-content:space-between;padding:12px 0;margin-bottom:8px}.header h1{font-size:20px;font-weight:700;letter-spacing:-.3px}.header h1 span{color:var(--gold)}.header-link{color:var(--text-muted);text-decoration:none;font-size:14px;font-weight:500;padding:8px 12px;border-radius:8px;transition:background .15s}.header-link:hover{background:var(--bg-card)}.hero{margin:24px 0 16px}.hero h2{font-size:28px;font-weight:800;line-height:1.15;letter-spacing:-.5px}.hero h2 em{font-style:normal;color:var(--gold)}.hero p{color:var(--text-muted);margin-top:8px;font-size:15px;line-height:1.5}.scenario-input{width:100%;min-height:100px;background:var(--bg-input);border:1.5px solid #333;border-radius:14px;padding:16px;color:var(--text);font-size:16px;line-height:1.5;resize:none;outline:none;transition:border-color .2s;font-family:inherit;margin-top:20px}.scenario-input:focus{border-color:var(--gold)}.scenario-input::placeholder{color:#555}.quick-picks{display:flex;flex-wrap:wrap;gap:8px;margin-top:12px}.quick-pick{background:var(--bg-card);border:1px solid #333;border-radius:20px;padding:8px 14px;color:var(--text-muted);font-size:13px;cursor:pointer;transition:all .15s}.quick-pick:hover{border-color:var(--gold);color:var(--text)}.difficulty-section{margin-top:28px}.difficulty-section h3{font-size:14px;font-weight:600;text-transform:uppercase;letter-spacing:1px;color:var(--text-muted);margin-bottom:14px}.difficulty-buttons{display:flex;gap:10px}.diff-btn{flex:1 1;padding:18px 12px;border-radius:14px;border:2px solid #333;background:var(--bg-card);color:var(--text);font-size:15px;font-weight:700;cursor:pointer;transition:all .2s;text-align:center}.diff-btn .diff-icon{font-size:24px;display:block;margin-bottom:6px}.diff-btn .diff-desc{font-size:11px;font-weight:400;color:var(--text-muted);display:block;margin-top:4px}.diff-btn.easy.active,.diff-btn.easy:hover{border-color:var(--green);background:#22c55e15}.diff-btn.moderate.active,.diff-btn.moderate:hover{border-color:var(--gold);background:#f59e0b15}.diff-btn.difficult.active,.diff-btn.difficult:hover{border-color:var(--red);background:#ef444415}.diff-btn:disabled{opacity:.4;cursor:not-allowed}.start-btn{width:100%;padding:18px;border:none;border-radius:14px;background:var(--gold);color:#000;font-size:17px;font-weight:700;cursor:pointer;margin-top:24px;transition:all .2s;letter-spacing:-.2px}.start-btn:hover{background:var(--gold-dark);transform:translateY(-1px)}.start-btn:disabled{opacity:.35;cursor:not-allowed;transform:none}.start-btn:active{transform:translateY(0)}.chat-header{display:flex;align-items:center;justify-content:space-between;padding:12px 16px;background:var(--bg-card);border-radius:14px;margin-bottom:12px}.chat-persona{font-weight:700;font-size:16px}.chat-meta{display:flex;gap:16px;align-items:center;font-size:13px;color:var(--text-muted)}.chat-turns{font-weight:600}.chat-diff{padding:3px 10px;border-radius:20px;font-size:11px;font-weight:700;text-transform:uppercase}.chat-diff.easy{background:#22c55e25;color:var(--green)}.chat-diff.moderate{background:#f59e0b25;color:var(--gold)}.chat-diff.difficult{background:#ef444425;color:var(--red)}.chat-messages{flex:1 1;overflow-y:auto;padding:8px 0;display:flex;flex-direction:column;gap:12px;-webkit-overflow-scrolling:touch}.msg{max-width:85%;padding:12px 16px;border-radius:18px;font-size:15px;line-height:1.45;animation:msgIn .25s ease-out}@keyframes msgIn{0%{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}.msg.ai{background:var(--bg-card);border:1px solid #2a2a2a;align-self:flex-start;border-bottom-left-radius:6px}.msg.user{background:var(--gold);color:#000;align-self:flex-end;border-bottom-right-radius:6px;font-weight:500}.msg.system{background:transparent;color:var(--text-muted);font-size:13px;text-align:center;align-self:center;font-style:italic}.chat-input-row{display:flex;gap:8px;padding:12px 0;align-items:flex-end}.chat-input{flex:1 1;background:var(--bg-input);border:1.5px solid #333;border-radius:14px;padding:14px 16px;color:var(--text);font-size:16px;outline:none;font-family:inherit;transition:border-color .2s;min-height:48px;max-height:120px;resize:none}.chat-input:focus{border-color:var(--gold)}.send-btn{width:48px;height:48px;border:none;border-radius:14px;background:var(--gold);color:#000;font-size:20px;cursor:pointer;flex-shrink:0;display:flex;align-items:center;justify-content:center;transition:background .15s}.send-btn:hover{background:var(--gold-dark)}.send-btn:disabled{opacity:.35;cursor:not-allowed}.end-btn{padding:10px 20px;border:2px solid var(--red);border-radius:14px;background:transparent;color:var(--red);font-size:14px;font-weight:700;cursor:pointer;transition:all .15s}.end-btn:hover{background:#ef444420}.typing-indicator{display:flex;gap:5px;padding:12px 16px;align-self:flex-start}.typing-indicator span{width:8px;height:8px;background:#555;border-radius:50%;animation:bounce 1.2s infinite}.typing-indicator span:nth-child(2){animation-delay:.15s}.typing-indicator span:nth-child(3){animation-delay:.3s}@keyframes bounce{0%,60%,to{transform:translateY(0)}30%{transform:translateY(-8px)}}.score-hero{text-align:center;padding:32px 0 24px}.score-number{font-size:72px;font-weight:900;letter-spacing:-3px;line-height:1}.score-grade{font-size:20px;font-weight:700;margin-top:4px}.score-number.high{color:var(--green)}.score-number.mid{color:var(--gold)}.score-number.low{color:var(--red)}.score-scenario{font-size:13px;color:var(--text-muted);margin-top:8px}.dimensions{display:flex;flex-direction:column;gap:12px;margin:20px 0}.dim-row{display:flex;align-items:center;justify-content:space-between;background:var(--bg-card);border-radius:12px;padding:14px 16px}.dim-label{font-size:14px;font-weight:600}.dim-score{font-size:18px;font-weight:800}.dim-bar{flex:1 1;height:6px;background:#333;border-radius:3px;margin:0 14px;overflow:hidden}.dim-fill{height:100%;border-radius:3px;transition:width .8s ease-out}.dim-fill.high{background:var(--green)}.dim-fill.mid{background:var(--gold)}.dim-fill.low{background:var(--red)}.feedback-section{background:var(--bg-card);border-radius:14px;padding:18px;margin:12px 0}.feedback-section h3{font-size:15px;font-weight:700;margin-bottom:12px;display:flex;align-items:center;gap:8px}.feedback-section h3.good{color:var(--green)}.feedback-section h3.improve{color:var(--red)}.feedback-item{margin-bottom:14px;padding-bottom:14px;border-bottom:1px solid #2a2a2a}.feedback-item:last-child{border-bottom:none;margin-bottom:0;padding-bottom:0}.feedback-quote{font-size:13px;color:var(--text-muted);font-style:italic;margin-bottom:6px;padding-left:10px;border-left:2px solid #444}.feedback-analysis{font-size:14px;line-height:1.5}.rewrite-box{background:#22c55e10;border:1px solid #22c55e30;border-radius:10px;padding:12px;margin-top:8px}.rewrite-label{font-size:11px;font-weight:700;text-transform:uppercase;color:var(--green);margin-bottom:4px;letter-spacing:.5px}.rewrite-text{font-size:14px;line-height:1.45;color:var(--green)}.action-buttons{display:flex;gap:10px;margin-top:24px;padding-bottom:32px}.action-btn{flex:1 1;padding:16px;border-radius:14px;font-size:15px;font-weight:700;cursor:pointer;text-align:center;text-decoration:none;transition:all .15s}.action-btn.primary{background:var(--gold);border:none;color:#000}.action-btn.secondary{background:transparent;border:2px solid #333;color:var(--text)}.action-btn:hover{transform:translateY(-1px)}.history-empty{text-align:center;padding:60px 20px;color:var(--text-muted)}.history-empty .empty-icon{font-size:48px;margin-bottom:16px}.history-empty p{font-size:15px;line-height:1.5}.history-list{display:flex;flex-direction:column;gap:10px;padding-bottom:32px}.history-card{background:var(--bg-card);border-radius:14px;padding:16px;text-decoration:none;color:var(--text);cursor:pointer;transition:all .15s;border:1px solid transparent}.history-card:hover{border-color:#333;transform:translateY(-1px)}.history-card-top{display:flex;justify-content:space-between;align-items:center;margin-bottom:8px}.history-score{font-size:24px;font-weight:900}.history-date{font-size:12px;color:var(--text-muted)}.history-scenario{font-size:14px;color:var(--text-muted);line-height:1.4;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}.history-badges{display:flex;gap:6px;margin-top:8px}.history-badge{font-size:11px;padding:3px 8px;border-radius:6px;font-weight:600}.chart-container{background:var(--bg-card);border-radius:14px;padding:20px;margin:16px 0}.chart-container h3{font-size:15px;font-weight:700;margin-bottom:16px}.chart-line{width:100%;height:120px;position:relative}.chart-svg{width:100%;height:100%}.stats-row{display:flex;gap:10px;margin:16px 0}.stat-card{flex:1 1;background:var(--bg-card);border-radius:12px;padding:16px;text-align:center}.stat-value{font-size:28px;font-weight:900;color:var(--gold)}.stat-label{font-size:11px;color:var(--text-muted);margin-top:4px;text-transform:uppercase;letter-spacing:.5px}.loading-screen{display:flex;flex-direction:column;align-items:center;justify-content:center;min-height:60vh;gap:16px}.spinner{width:40px;height:40px;border:3px solid #333;border-top:3px solid var(--gold);border-radius:50%;animation:spin .7s linear infinite}@keyframes spin{to{transform:rotate(1turn)}}.bottom-nav{position:fixed;bottom:0;left:0;right:0;background:#111;border-top:1px solid #222;display:flex;justify-content:center;padding:8px 0 calc(8px + env(safe-area-inset-bottom));z-index:100}.bottom-nav a{flex:1 1;max-width:160px;display:flex;flex-direction:column;align-items:center;gap:4px;text-decoration:none;color:var(--text-muted);font-size:11px;font-weight:600;padding:6px 0;transition:color .15s}.bottom-nav a.active{color:var(--gold)}.bottom-nav .nav-icon{font-size:22px}