:root{--font-sans:-apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;--font-mono:ui-monospace, SFMono-Regular, SF Mono, Menlo, Consolas, Liberation Mono, monospace;--bg:#000;--text-primary:#fff;--text-secondary:#999;--text-muted:#666;--border:#333;--input-bg:#111;--input-border:#444;--input-text:#fff;--btn-bg:#222;--btn-border:#444;--btn-text:#fff;--btn-hover-bg:#333;--error:#f44;--error-bg:#1a0a0a;--accent:#fff;--bg-tooltip:#111}body.light-theme{--bg:#ddd;--text-primary:#000;--text-secondary:#444;--text-muted:#666;--border:#999;--input-bg:#fff;--input-border:#777;--input-text:#000;--btn-bg:#e0e0e0;--btn-border:#888;--btn-text:#000;--btn-hover-bg:#d0d0d0;--error:#c00;--error-bg:#fee;--accent:#000;--bg-tooltip:#fff}*{box-sizing:border-box;margin:0;padding:0}body{font-family:var(--font-sans);background:var(--bg);color:var(--text-primary);-webkit-font-smoothing:antialiased;justify-content:center;align-items:flex-start;min-height:100vh;padding:40px 20px;transition:background .2s,color .2s;display:flex}body.game-active{width:100%!important;height:100%!important;position:fixed!important;overflow:hidden!important}.app-container{flex-direction:column;gap:20px;width:100%;max-width:680px;display:flex}.app-header{justify-content:space-between;align-items:center;display:flex}.header-controls{gap:16px;margin-left:auto;display:flex}.text-link-btn{color:var(--text-secondary);font-family:var(--font-sans);cursor:pointer;background:0 0;border:none;font-size:13px;text-decoration:underline;transition:color .15s}.text-link-btn:hover{color:var(--text-primary)}.settings-view{flex-direction:column;gap:20px;display:flex}.game-title{letter-spacing:-.5px;font-size:32px;font-weight:700}.game-intro,.game-subintro{color:var(--text-primary);font-size:15px;line-height:1.5}.classic-link{color:var(--text-primary);text-decoration:underline}.classic-link:hover{color:var(--text-secondary)}.settings-form{flex-direction:column;gap:24px;margin-top:10px;display:flex}.form-rows{flex-direction:column;gap:18px;display:flex}.op-row{flex-direction:column;gap:6px;display:flex}.checkbox-line{align-items:center;gap:8px;display:flex}.checkbox-line input[type=checkbox]{cursor:pointer;width:14px;height:14px}.bold-label{cursor:pointer;-webkit-user-select:none;user-select:none;font-size:15px;font-weight:700}.op-range-container{flex-wrap:wrap;align-items:center;gap:8px 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4px;font-size:13px}.form-actions{justify-content:flex-start;margin-top:10px;display:flex}.btn-classic{background:var(--btn-bg);border:1px solid var(--btn-border);color:var(--btn-text);font-family:var(--font-sans);cursor:pointer;border-radius:4px;padding:6px 20px;font-size:14px;font-weight:600;transition:all .15s}.btn-classic:hover{background:var(--btn-hover-bg)}.game-view{flex-direction:column;align-items:flex-start;gap:32px;display:flex}.game-hud{flex-direction:row;align-items:center;gap:24px;font-size:15px;display:flex}.hud-right-group{align-items:center;gap:16px;display:flex}.bold-stat{font-weight:700;font-family:var(--font-mono)}.theme-toggle{color:var(--text-secondary);cursor:pointer;background:0 0;border:none;border-radius:4px;justify-content:center;align-items:center;padding:4px;transition:color .15s,background-color .15s;display:flex}.theme-toggle:hover{color:var(--text-primary);background-color:#80808026}.timer-warn{color:var(--error)!important}.problem-container{font-family:var(--font-sans);grid-template-columns:1fr auto 1fr;align-items:center;gap:16px;width:100%;margin-top:80px;font-size:32px;font-weight:500;display:grid}body.voice-mode-active .equals-sign,body.voice-mode-active .input-wrapper{display:none!important}body.voice-mode-active .problem-container{grid-template-columns:1fr}body.voice-mode-active .problem-text{text-align:center}.problem-text{-webkit-user-select:none;user-select:none;text-align:right;font-size:32px;font-weight:700}.equals-sign{text-align:center;font-weight:700}.input-wrapper{justify-content:flex-start;width:100%;max-width:120px;display:flex}.answer-input-classic{background:var(--input-bg);border:1px solid var(--input-border);width:100%;height:48px;color:var(--input-text);font-family:var(--font-mono);text-align:center;border-radius:4px;outline:none;font-size:30px;font-weight:700}.voice-micro-bar{flex-direction:column;gap:8px;display:flex}.btn-voice-classic{cursor:pointer;font-family:var(--font-sans);color:var(--text-secondary);background:0 0;border:none;align-items:center;gap:8px;font-size:13px;text-decoration:underline;display:flex}.btn-voice-classic:hover{color:var(--text-primary)}.mic-dot{background:var(--text-muted);border-radius:50%;width:8px;height:8px}.voice-active{font-weight:700;color:var(--text-primary)!important}.voice-active .mic-dot{background:var(--error);animation:1s infinite alternate voice-pulse}@keyframes voice-pulse{0%{opacity:.4}to{opacity:1}}.voice-mini-transcript{color:var(--text-muted);gap:6px;font-size:13px;font-style:italic;display:flex}.game-actions{width:100%}.btn-quit-classic{color:var(--text-secondary);cursor:pointer;background:0 0;border:none;font-size:14px;text-decoration:underline}.btn-quit-classic:hover{color:var(--text-primary)}.results-view{flex-direction:column;gap:32px;display:flex}.results-score-banner{color:var(--text-primary);font-size:22px}.score-emphasis{font-weight:700}.results-meta-hud{gap:24px;font-size:15px;display:flex}.analytics-layout-classic{grid-template-columns:1fr 1fr;gap:40px;display:grid}@media (width<=768px){.analytics-layout-classic{grid-template-columns:1fr;gap:32px}}.sub-title{color:var(--text-primary);margin-bottom:12px;font-size:16px;font-weight:700}.classic-table{border-collapse:collapse;text-align:left;width:100%;font-size:14px}.classic-table th{color:var(--text-muted);text-transform:uppercase;border-bottom:2px solid var(--border);padding:8px 10px;font-size:11px;font-weight:700}.classic-table td{color:var(--text-primary);border-bottom:1px solid var(--border);padding:10px}.classic-table tr:hover td{color:var(--text-secondary)}.chart-wrapper-classic{border:1px solid var(--border);background:var(--input-bg);border-radius:4px;width:100%;height:200px;position:relative}.graph-tooltip{background:var(--bg-tooltip);border:1px solid var(--border);color:var(--text-primary);font-family:var(--font-sans);border-radius:4px;flex-direction:column;gap:2px;padding:6px 10px;font-size:11px;transition:left .1s,top .1s;display:flex;transform:translate(-50%,-100%);box-shadow:0 4px 12px #00000040}.tooltip-time{color:var(--text-muted);text-transform:uppercase;font-size:10px}.tooltip-ppm{align-items:baseline;gap:3px;display:flex}.tooltip-num{font-weight:700;font-family:var(--font-mono)}.tooltip-unit{color:var(--text-secondary);font-size:9px}.results-actions{border-top:1px solid var(--border);gap:24px;padding-top:20px;display:flex}.btn-classic-action{color:var(--text-secondary);font-family:var(--font-sans);cursor:pointer;background:0 0;border:none;font-size:15px;text-decoration:underline}.btn-classic-action:hover{color:var(--text-primary)}input::-webkit-outer-spin-button{-webkit-appearance:none;margin:0}input::-webkit-inner-spin-button{-webkit-appearance:none;margin:0}input[type=number]{-moz-appearance:textfield}@media (width<=480px){body{padding:16px 24px}.game-title{font-size:26px}.op-range-container{gap:6px 4px;margin-left:12px;font-size:13px}.input-classic{width:38px;height:20px;font-size:12px}.bold-label{font-size:14px}.op-desc{margin-left:12px;font-size:13px}.game-view{gap:20px}.problem-container{gap:8px;margin-top:52px;font-size:26px}.problem-text{font-size:26px}.answer-input-classic{height:40px;font-size:24px}.results-view{gap:24px}.results-score-banner{font-size:18px}.analytics-layout-classic{gap:24px}}