* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        :root {
            --bg: #ffffff;
            --text: #000000;
            --text-secondary: rgba(0, 0, 0, 0.5);
            --text-muted: rgba(0, 0, 0, 0.25);
            --border: rgba(0, 0, 0, 0.1);
            --accent: #000000;
            --cursor: #000000;
            --error: #000000;
            --word-bg: transparent;
            --shadow: rgba(0, 0, 0, 0.05);
        }

        [data-theme="dark"] {
            --bg: #0a0a0a;
            --text: #e0e0e0;
            --text-secondary: rgba(255, 255, 255, 0.5);
            --text-muted: rgba(255, 255, 255, 0.2);
            --border: rgba(255, 255, 255, 0.1);
            --accent: #ffffff;
            --cursor: #ffffff;
            --error: #ff5555;
            --word-bg: rgba(255, 255, 255, 0.02);
            --shadow: rgba(0, 0, 0, 0.3);
        }

        body {
            background: var(--bg);
            color: var(--text);
            font-family: 'SF Mono', Monaco, 'Cascadia Code', 'Roboto Mono', Consolas, 'Courier New', monospace;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            padding: 20px;
            overflow-x: hidden;
            transition: background 0.3s ease, color 0.3s ease;
        }

        .container {
            width: 100%;
            max-width: 1000px;
            position: relative;
        }

        .header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 20px;
            opacity: 0;
            animation: slideDown 0.6s ease forwards;
        }

        .logo {
            font-size: 18px;
            font-weight: 600;
            letter-spacing: 0.1em;
            text-transform: uppercase;
        }

        .theme-toggle {
            background: transparent;
            border: 1px solid var(--border);
            color: var(--text);
            padding: 8px 16px;
            font-family: inherit;
            font-size: 12px;
            cursor: pointer;
            text-transform: uppercase;
            letter-spacing: 0.05em;
            transition: all 0.2s ease;
            border-radius: 4px;
        }

        .theme-toggle:hover {
            border-color: var(--accent);
            background: var(--accent);
            color: var(--bg);
        }

        .config-bar {
            display: flex;
            gap: 40px;
            margin-bottom: 40px;
            padding: 16px 20px;
            border: 1px solid var(--border);
            border-radius: 8px;
            opacity: 0;
            animation: slideDown 0.6s ease 0.1s forwards;
            background: var(--word-bg);
        }

        .config-group {
            display: flex;
            flex-direction: column;
            gap: 8px;
        }

        .config-label {
            font-size: 10px;
            text-transform: uppercase;
            letter-spacing: 0.15em;
            color: var(--text-secondary);
        }

        .config-options {
            display: flex;
            gap: 6px;
            flex-wrap: wrap;
        }

        .config-btn {
            padding: 4px 10px;
            background: transparent;
            border: 1px solid transparent;
            color: var(--text-secondary);
            font-family: inherit;
            font-size: 11px;
            cursor: pointer;
            transition: all 0.2s ease;
            text-transform: uppercase;
            letter-spacing: 0.05em;
            border-radius: 4px;
        }

        .config-btn:hover {
            color: var(--text);
            border-color: var(--border);
        }

        .config-btn.active {
            color: var(--accent);
            border-color: var(--accent);
            background: var(--accent);
            color: var(--bg);
        }

        .custom-input {
            width: 50px;
            padding: 4px 8px;
            border: 1px solid var(--border);
            background: transparent;
            color: var(--text);
            font-family: inherit;
            font-size: 11px;
            text-align: center;
            outline: none;
            border-radius: 4px;
        }

        .custom-input:focus {
            border-color: var(--accent);
        }

        .stats {
            display: flex;
            gap: 40px;
            margin-bottom: 40px;
            font-size: 14px;
            opacity: 0;
            animation: fadeIn 0.6s ease 0.2s forwards;
        }

        .stat {
            display: flex;
            flex-direction: column;
            gap: 4px;
        }

        .stat-label {
            color: var(--text-secondary);
            font-size: 11px;
            text-transform: uppercase;
            letter-spacing: 0.1em;
        }

        .stat-value {
            font-size: 28px;
            font-weight: 500;
            transition: all 0.3s ease;
            font-variant-numeric: tabular-nums;
            color: var(--text);
        }

        .stat-value.update {
            animation: statPulse 0.3s ease;
        }

        @keyframes statPulse {
            0%, 100% { transform: scale(1); }
            50% { transform: scale(1.1); }
        }

        .typing-area {
            position: relative;
            font-size: 24px;
            line-height: 2;
            letter-spacing: 0.02em;
            min-height: 280px;
            cursor: text;
            user-select: none;
            -webkit-user-select: none;
            opacity: 0;
            animation: fadeIn 0.6s ease 0.3s forwards;
            padding: 20px;
            border-radius: 12px;
            transition: background 0.3s ease;
        }

        .typing-area:hover {
            background: var(--word-bg);
        }

        .words-wrapper {
            position: relative;
            display: flex;
            flex-wrap: wrap;
            gap: 12px 10px;
            perspective: 1000px;
        }

        .word {
            position: relative;
            display: flex;
            transform-style: preserve-3d;
            transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            padding: 4px 6px;
            border-radius: 6px;
            border-bottom: 1px solid var(--border);
        }

        .word.entering {
            animation: wordEnter 0.4s cubic-bezier(0.34, 1.56, 0.64, 1) forwards;
        }

        @keyframes wordEnter {
            from {
                opacity: 0;
                transform: translateY(10px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        .word.active {
            background: var(--word-bg);
            border-bottom-color: var(--accent);
        }

        .word.completed {
            opacity: 0.4;
            border-bottom-color: transparent;
        }

        .word.error {
            animation: wordShake 0.4s ease;
        }

        @keyframes wordShake {
            0%, 100% { transform: translateX(0); }
            25% { transform: translateX(-4px); }
            75% { transform: translateX(4px); }
        }

        .char {
            position: relative;
            transition: all 0.15s ease;
            padding: 2px 1px;
            display: inline-block;
            color: var(--text-muted);
        }

        .char.correct {
            color: var(--text);
            animation: charCorrect 0.2s ease;
        }

        @keyframes charCorrect {
            0% { transform: scale(1.1); color: var(--accent); }
            100% { transform: scale(1); color: var(--text); }
        }

        .char.incorrect {
            color: var(--error);
            position: relative;
        }

        .char.incorrect::after {
            content: '';
            position: absolute;
            left: 0;
            bottom: 2px;
            width: 100%;
            height: 1px;
            background: var(--error);
            animation: strikeExpand 0.15s ease forwards;
        }

        @keyframes strikeExpand {
            from { transform: scaleX(0); transform-origin: left; }
            to { transform: scaleX(1); transform-origin: left; }
        }

        .char.extra {
            color: var(--error);
            opacity: 0.7;
            animation: charPop 0.2s ease;
        }

        @keyframes charPop {
            0% { transform: scale(0); }
            80% { transform: scale(1.1); }
            100% { transform: scale(1); }
        }

        .char.cursor {
            color: var(--bg);
            background: var(--cursor);
            border-radius: 2px;
            animation: cursorBlink 1.2s infinite;
        }

        @keyframes cursorBlink {
            0%, 45% { opacity: 1; }
            50%, 95% { opacity: 0.4; }
            100% { opacity: 1; }
        }

        .char.missed {
            opacity: 0.3;
            text-decoration: underline;
            text-decoration-style: wavy;
            text-decoration-color: var(--text-muted);
        }

        .hidden-input {
            position: absolute;
            opacity: 0;
            pointer-events: none;
        }

        .restart-btn {
            margin-top: 40px;
            padding: 12px 32px;
            background: transparent;
            border: 1px solid var(--border);
            color: var(--text-secondary);
            font-family: inherit;
            font-size: 12px;
            cursor: pointer;
            text-transform: uppercase;
            letter-spacing: 0.1em;
            transition: all 0.3s ease;
            opacity: 0;
            transform: translateY(10px);
            border-radius: 6px;
        }

        .restart-btn.visible {
            opacity: 1;
            transform: translateY(0);
        }

        .restart-btn:hover {
            border-color: var(--accent);
            color: var(--accent);
            background: var(--word-bg);
        }

        .result-overlay {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: var(--bg);
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            opacity: 0;
            pointer-events: none;
            transition: opacity 0.4s ease;
            z-index: 100;
            overflow-y: auto;
            padding: 40px 20px;
        }

        .result-overlay.show {
            opacity: 1;
            pointer-events: all;
        }

        .result-header {
            text-align: center;
            margin-bottom: 40px;
            transform: translateY(-20px);
            opacity: 0;
            transition: all 0.5s ease;
        }

        .result-overlay.show .result-header {
            transform: translateY(0);
            opacity: 1;
        }

        .result-wpm {
            font-size: 80px;
            font-weight: 300;
            line-height: 1;
            margin-bottom: 8px;
            font-variant-numeric: tabular-nums;
            color: var(--accent);
        }

        .result-label {
            font-size: 12px;
            text-transform: uppercase;
            letter-spacing: 0.3em;
            color: var(--text-secondary);
        }

        .result-stats {
            display: flex;
            gap: 50px;
            margin-bottom: 50px;
            transform: translateY(20px);
            opacity: 0;
            transition: all 0.5s ease 0.1s;
        }

        .result-overlay.show .result-stats {
            transform: translateY(0);
            opacity: 1;
        }

        .result-stat {
            text-align: center;
        }

        .result-stat-value {
            font-size: 28px;
            margin-bottom: 4px;
            font-variant-numeric: tabular-nums;
            color: var(--text);
        }

        .result-stat-label {
            font-size: 10px;
            text-transform: uppercase;
            color: var(--text-secondary);
            letter-spacing: 0.1em;
        }

        .replay-section {
            width: 100%;
            max-width: 800px;
            margin-bottom: 40px;
            transform: translateY(20px);
            opacity: 0;
            transition: all 0.5s ease 0.2s;
        }

        .result-overlay.show .replay-section {
            transform: translateY(0);
            opacity: 1;
        }

        .replay-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 16px;
        }

        .replay-title {
            font-size: 11px;
            text-transform: uppercase;
            letter-spacing: 0.15em;
            color: var(--text-secondary);
        }

        .replay-controls {
            display: flex;
            gap: 8px;
        }

        .replay-btn {
            padding: 6px 14px;
            background: transparent;
            border: 1px solid var(--border);
            color: var(--text-secondary);
            font-family: inherit;
            font-size: 10px;
            cursor: pointer;
            text-transform: uppercase;
            letter-spacing: 0.05em;
            transition: all 0.2s ease;
            border-radius: 4px;
        }

        .replay-btn:hover:not(:disabled) {
            border-color: var(--accent);
            color: var(--text);
        }

        .replay-btn:disabled {
            opacity: 0.3;
            cursor: not-allowed;
        }

        .replay-container {
            border: 1px solid var(--border);
            padding: 24px;
            min-height: 180px;
            position: relative;
            overflow: hidden;
            border-radius: 8px;
            background: var(--word-bg);
        }

        .replay-words {
            display: flex;
            flex-wrap: wrap;
            gap: 10px 6px;
            font-size: 18px;
            line-height: 1.6;
        }

        .replay-word {
            display: flex;
            position: relative;
            padding: 2px 4px;
            border-radius: 4px;
            border-bottom: 1px solid var(--border);
        }

        .replay-char {
            padding: 1px 2px;
            position: relative;
            transition: all 0.1s ease;
            color: var(--text-muted);
        }

        .replay-char.correct {
            color: var(--text);
            background: transparent;
        }

        .replay-char.incorrect {
            color: var(--error);
            text-decoration: line-through;
            text-decoration-thickness: 1px;
        }

        .replay-char.missing {
            opacity: 0.3;
            text-decoration: underline;
            text-decoration-style: wavy;
            text-decoration-color: var(--text-muted);
        }

        .replay-cursor {
            position: absolute;
            width: 2px;
            height: 20px;
            background: var(--accent);
            top: 0;
            transition: all 0.05s linear;
            border-radius: 1px;
        }

        .replay-progress {
            position: absolute;
            bottom: 0;
            left: 0;
            height: 2px;
            background: var(--accent);
            transition: width 0.1s linear;
        }

        .heatmap-legend {
            display: flex;
            gap: 24px;
            margin-top: 16px;
            font-size: 10px;
            justify-content: center;
            color: var(--text-secondary);
        }

        .legend-item {
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .legend-box {
            width: 16px;
            height: 16px;
            border: 1px solid var(--border);
            border-radius: 3px;
        }

        .legend-box.correct { background: var(--text); border-color: var(--text); }
        .legend-box.incorrect { background: transparent; border-color: var(--error); }
        .legend-box.missing { 
            background: transparent;
            border-style: dashed;
        }

        .action-buttons {
            display: flex;
            gap: 16px;
            transform: translateY(20px);
            opacity: 0;
            transition: all 0.5s ease 0.3s;
        }

        .result-overlay.show .action-buttons {
            transform: translateY(0);
            opacity: 1;
        }

        @keyframes slideDown {
            from { opacity: 0; transform: translateY(-10px); }
            to { opacity: 1; transform: translateY(0); }
        }

        @keyframes fadeIn {
            to { opacity: 1; }
        }

        @media (max-width: 768px) {
            .config-bar {
                flex-direction: column;
                gap: 16px;
            }

            .typing-area {
                font-size: 20px;
                padding: 16px;
            }

            .stats {
                gap: 24px;
            }

            .stat-value {
                font-size: 22px;
            }

            .result-wpm {
                font-size: 56px;
            }

            .result-stats {
                gap: 30px;
                flex-wrap: wrap;
                justify-content: center;
            }

            .replay-container {
                padding: 16px;
            }

            .replay-words {
                font-size: 14px;
            }
        }