:root {
 
            --accent-color: #e67e22;
            --light-gray: #f8f9fa;
            --border-color: #eaeaea;
            --text-color: #333;
            --text-muted: #6c757d;
            --success-color: #28a745;
            --warning-color: #ffc107;
            --danger-color: #dc3545;
            --coin-gold: #ffd700;
            --coin-silver: #c0c0c0;
            --heads-color: #3498db;
            --tails-color: #e74c3c;
        } 
        .page-header {
            background: linear-gradient(135deg, rgba(247, 220, 111, 0.4) 0%, rgba(243, 156, 18, 0.4) 100%);
            padding: 1.5rem 0;
            margin-bottom: 2rem;
            border-bottom: 1px solid rgba(243, 156, 18, 0.2);
            position: relative;
            overflow: hidden;   color: var(--text-color);
        }
         
        .breadcrumb {
            background-color: transparent;
            padding: 0.5rem 0;
            margin-bottom: 0.5rem;
        }
        
        .breadcrumb-item a {
            color: var(--text-muted);
            text-decoration: none;
        }
        
        .breadcrumb-item.active {
            color: var(--text-color);
        }
         
        .coin-flip-area {
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            margin: 2rem 0;
            padding: 2rem;
            background-color: #f9f9f9;
            border-radius: 12px;
            border: 1px solid var(--border-color);
        }
        
        .coin-container {
            perspective: 1000px;
            width: 200px;
            height: 200px;
            margin: 2rem auto;
            position: relative;
        }
        
        .coin {
            width: 100%;
            height: 100%;
            position: relative;
            transform-style: preserve-3d;
            transition: transform 1.5s cubic-bezier(0.34, 1.56, 0.64, 1);
            border-radius: 50%;
        }
        
        .coin-face {
            position: absolute;
            width: 100%;
            height: 100%;
            border-radius: 50%;
            backface-visibility: hidden;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 4rem;
            font-weight: bold;
            box-shadow: 
                inset 0 0 20px rgba(0, 0, 0, 0.2),
                0 10px 30px rgba(0, 0, 0, 0.3);
            overflow: hidden;
        }
        
        .heads {
            background: radial-gradient(circle at 30% 30%, var(--coin-gold) 0%, #daa520 100%);
            color: #2c3e50;
            z-index: 2;
            transform: rotateY(0deg);
        }
        
        .tails {
            background: radial-gradient(circle at 30% 30%, var(--coin-silver) 0%, #a9a9a9 100%);
            color: #2c3e50;
            transform: rotateY(180deg);
        }
        
        .coin-edge {
            position: absolute;
            width: 100%;
            height: 20px;
            background: linear-gradient(90deg, #8b4513, #a0522d, #8b4513);
            border-radius: 10px;
            top: 50%;
            transform: translateY(-50%) rotateX(90deg);
            z-index: 1;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
        }
        
        .flipping {
            animation: flipAnimation 1.5s ease-in-out;
        }
        
        @keyframes flipAnimation {
            0% { transform: rotateY(0); }
            25% { transform: rotateY(720deg); }
            50% { transform: rotateY(1080deg); }
            75% { transform: rotateY(1440deg); }
            100% { transform: rotateY(1800deg); }
        }
        
        .result-display {
            font-size: 1.8rem;
            font-weight: 700;
            margin-top: 2rem;
            padding: 1rem 2rem;
            border-radius: 10px;
            text-align: center;
            min-width: 250px;
        }
        
        .result-heads {
            background-color: rgba(52, 152, 219, 0.1);
            color: var(--heads-color);
            border: 2px solid var(--heads-color);
        }
        
        .result-tails {
            background-color: rgba(231, 76, 60, 0.1);
            color: var(--tails-color);
            border: 2px solid var(--tails-color);
        }
        
        .flip-controls {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 1rem;
            margin: 1.5rem 0;
        }
        
        .flip-btn {
            padding: 0.75rem 2rem;
            border-radius: 50px;
            font-weight: 600;
            transition: all 0.3s;
            border: none;
            font-size: 1.1rem;
        }
        
        .flip-btn-primary {
            background-color: var(--primary-color);
            color: white;
        }
        
        .flip-btn-primary:hover {
            background-color: var(--accent-color);
            transform: translateY(-3px);
            box-shadow: 0 5px 15px rgba(243, 156, 18, 0.3);
        }
        
        .flip-btn-secondary {
            background-color: #6c757d;
            color: white;
        }
        
        .flip-btn-secondary:hover {
            background-color: #5a6268;
            transform: translateY(-3px);
        }
        
        .flip-btn-success {
            background-color: var(--success-color);
            color: white;
        }
        
        .flip-btn-success:hover {
            background-color: #218838;
            transform: translateY(-3px);
        }
        
        .stats-container {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
            gap: 1.5rem;
            margin: 2rem 0;
        }
        
        .stat-box {
            background-color: white;
            border-radius: 8px;
            padding: 1.5rem;
            text-align: center;
            border: 1px solid var(--border-color);
            box-shadow: 0 3px 10px rgba(0,0,0,0.05);
            transition: transform 0.3s;
        }
        
        .stat-box:hover {
            transform: translateY(-5px);
        }
        
        .stat-value {
            font-size: 2.5rem;
            font-weight: 700;
            margin-bottom: 0.5rem;
        }
        
        .stat-heads .stat-value {
            color: var(--heads-color);
        }
        
        .stat-tails .stat-value {
            color: var(--tails-color);
        }
        
        .stat-label {
            color: var(--text-muted);
            font-size: 0.9rem;
            text-transform: uppercase;
            letter-spacing: 1px;
        }
        
        .progress-container {
            margin: 2rem 0;
        }
        
        .progress-label {
            display: flex;
            justify-content: space-between;
            margin-bottom: 0.5rem;
        }
        
        .progress {
            height: 20px;
            border-radius: 10px;
            overflow: hidden;
        }
        
        .progress-bar-heads {
            background-color: var(--heads-color);
        }
        
        .progress-bar-tails {
            background-color: var(--tails-color);
        }
        
        .history-container {
            background-color: var(--light-gray);
            border-radius: 8px;
            padding: 1.5rem;
            margin: 1.5rem 0;
            max-height: 300px;
            overflow-y: auto;
            border: 1px solid var(--border-color);
        }
        
        .history-title {
            font-weight: 600;
            margin-bottom: 1rem;
            color: var(--primary-color);
        }
        
        .history-list {
            display: flex;
            flex-wrap: wrap;
            gap: 0.75rem;
        }
        
        .history-item {
            padding: 0.5rem 1rem;
            background-color: white;
            border-radius: 50px;
            border: 1px solid var(--border-color);
            font-weight: 500;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        
        .history-item-heads {
            border-left: 4px solid var(--heads-color);
        }
        
        .history-item-tails {
            border-left: 4px solid var(--tails-color);
        }
        
        .decision-mode {
            background-color: rgba(52, 152, 219, 0.05);
            border-left: 3px solid var(--heads-color);
            padding: 1.5rem;
            border-radius: 0 8px 8px 0;
            margin: 2rem 0;
        }
        
        .mode-selection {
            display: flex;
            flex-wrap: wrap;
            gap: 0.75rem;
            margin: 1.5rem 0;
        }
        
        .mode-btn {
            padding: 0.75rem 1.5rem;
            border-radius: 6px;
            font-weight: 600;
            background-color: white;
            border: 2px solid var(--border-color);
            transition: all 0.3s;
        }
        
        .mode-btn:hover {
            background-color: var(--light-gray);
        }
        
        .mode-btn.active {
            background-color: var(--primary-color);
            color: white;
            border-color: var(--primary-color);
        }
        
        .decision-inputs {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 1rem;
            margin: 1.5rem 0;
        }
        
        .decision-option {
            padding: 1.5rem;
            background-color: white;
            border-radius: 8px;
            border: 2px solid var(--border-color);
            text-align: center;
            transition: all 0.3s;
        }
        
        .decision-option.active {
            border-color: var(--primary-color);
            background-color: rgba(243, 156, 18, 0.05);
        }
        
        .option-label {
            font-weight: 600;
            margin-bottom: 0.5rem;
            color: var(--text-muted);
        }
        
        .probability-chart {
            width: 100%;
            height: 200px;
            margin: 2rem 0;
            position: relative;
        }
        
        .chart-bar {
            position: absolute;
            bottom: 0;
            width: 40%;
            transition: height 1s ease;
            border-radius: 8px 8px 0 0;
            display: flex;
            align-items: flex-start;
            justify-content: center;
            padding-top: 10px;
            font-weight: bold;
            color: white;
        }
        
        .chart-heads {
            left: 10%;
            background-color: var(--heads-color);
        }
        
        .chart-tails {
            right: 10%;
            background-color: var(--tails-color);
        }
         
        .probability-info {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
            gap: 1.5rem;
            margin: 1.5rem 0;
        }
        
        .info-card {
            background: white;
            border-radius: 8px;
            padding: 1.5rem;
            border: 1px solid var(--border-color);
            box-shadow: 0 2px 4px rgba(0,0,0,0.05);
        }
        
        .info-icon {
            width: 48px;
            height: 48px;
            border-radius: 8px;
            background-color: rgba(243, 156, 18, 0.1);
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 1rem;
            color: var(--primary-color);
            font-size: 1.25rem;
        }
        
        .info-title {
            font-weight: 600;
            margin-bottom: 0.5rem;
            color: var(--text-color);
        }
        
        .info-desc {
            color: var(--text-muted);
            font-size: 0.9rem;
        }
        
        .streak-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            background: linear-gradient(135deg, #f7dc6f, #f39c12);
            padding: 1.5rem;
            border-radius: 8px;
            margin: 1.5rem 0;
            color: white;
        }
        
        .streak-info {
            display: flex;
            align-items: center;
            gap: 1rem;
        }
        
        .streak-icon {
            font-size: 2.5rem;
        }
        
        .streak-text h3 {
            margin: 0;
            font-weight: 700;
        }
        
        .streak-value {
            font-size: 3rem;
            font-weight: 700;
        }
        
        .toss-count-selector {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 1rem;
            margin: 1.5rem 0;
        }
        
        .count-btn {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            border: 2px solid var(--border-color);
            background-color: white;
            font-weight: bold;
            font-size: 1.2rem;
            transition: all 0.3s;
        }
        
        .count-btn:hover {
            border-color: var(--primary-color);
            color: var(--primary-color);
        }
        
        .count-display {
            font-size: 1.5rem;
            font-weight: 700;
            min-width: 60px;
            text-align: center;
        }
        
        .batch-results {
            display: none;
            margin-top: 2rem;
            padding: 1.5rem;
            background-color: white;
            border-radius: 8px;
            border: 1px solid var(--border-color);
        }
        
        .results-table {
            width: 100%;
            margin-top: 1rem;
        }
        
        .results-table th {
            background-color: var(--light-gray);
            font-weight: 600;
            padding: 0.75rem;
            text-align: left;
        }
        
        .results-table td {
            padding: 0.75rem;
            border-bottom: 1px solid var(--border-color);
        }
        
        @media (max-width: 768px) {
            .tool-card {
                padding: 1.5rem;
            }
            
            .coin-container {
                width: 150px;
                height: 150px;
            }
            
            .coin-face {
                font-size: 3rem;
            }
            
            .flip-controls {
                flex-direction: column;
                align-items: center;
            }
            
            .flip-btn {
                width: 100%;
                max-width: 300px;
            }
            
            .decision-inputs {
                grid-template-columns: 1fr;
            }
            
            .stats-container {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        
        @media (max-width: 480px) {
            .coin-container {
                width: 120px;
                height: 120px;
            }
            
            .coin-face {
                font-size: 2.5rem;
            }
            
            .stats-container {
                grid-template-columns: 1fr;
            }
        }
        
        .toast-container {
            position: fixed;
            bottom: 20px;
            right: 20px;
            z-index: 1050;
        }
        
        @keyframes pulse {
            0% { transform: scale(1); }
            50% { transform: scale(1.1); }
            100% { transform: scale(1); }
        }
        
        .pulse {
            animation: pulse 0.5s ease;
        }
        
        .btn {
            border-radius: 6px;
            padding: 0.75rem 1.5rem;
            font-weight: 600;
            transition: all 0.3s;
        }
        
        .btn-primary {
            background-color: var(--primary-color);
            border-color: var(--primary-color);
        }
        
        .btn-primary:hover {
            background-color: var(--accent-color);
            border-color: var(--accent-color);
            transform: translateY(-1px);
        }
        
        .btn-outline-primary {
            color: var(--primary-color);
            border-color: var(--primary-color);
        }
        
        .btn-outline-primary:hover {
            background-color: var(--primary-color);
            border-color: var(--primary-color);
            color: white;
        }
        
        .alert {
            border-radius: 6px;
            border: 1px solid transparent;
            padding: 1rem;
            margin-bottom: 1rem;
        }
        
        .alert-success {
            background-color: rgba(40, 167, 69, 0.1);
            border-color: rgba(40, 167, 69, 0.2);
            color: #155724;
        }
        
        .alert-info {
            background-color: rgba(23, 162, 184, 0.1);
            border-color: rgba(23, 162, 184, 0.2);
            color: #0c5460;
        }
        
        .alert-warning {
            background-color: rgba(255, 193, 7, 0.1);
            border-color: rgba(255, 193, 7, 0.2);
            color: #856404;
        }
        
        .alert-danger {
            background-color: rgba(220, 53, 69, 0.1);
            border-color: rgba(220, 53, 69, 0.2);
            color: #721c24;
        }
        
        .faq-section {
            margin-top: 2rem;
        }
        
       
        .flip-counter {
            display: inline-block;
            padding: 0.25rem 0.75rem;
            border-radius: 20px;
            background-color: rgba(243, 156, 18, 0.1);
            color: var(--primary-color);
            font-weight: 600;
            margin-left: 0.5rem;
        }
        
        .coin-design-selector {
            display: flex;
            justify-content: center;
            gap: 1rem;
            margin: 1rem 0;
        }
        
        .design-option {
            width: 60px;
            height: 60px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            border: 2px solid transparent;
            cursor: pointer;
            transition: all 0.3s;
        }
        
        .design-option:hover {
            transform: scale(1.1);
        }
        
        .design-option.selected {
            border-color: var(--primary-color);
            transform: scale(1.1);
        }
        
        .design-classic {
            background: radial-gradient(circle at 30% 30%, var(--coin-gold) 0%, #daa520 100%);
        }
        
        .design-silver {
            background: radial-gradient(circle at 30% 30%, var(--coin-silver) 0%, #a9a9a9 100%);
        }
        
        .design-bronze {
            background: radial-gradient(circle at 30% 30%, #cd7f32 0%, #8b4513 100%);
        }