/* Exponent Rules Game Styles */

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

body {
    font-family: 'Arial', sans-serif;
    background: linear-gradient(135deg, #6B46C1 0%, #805AD5 100%);
    min-height: 100vh;
    padding: 20px;
    color: #333;
}

/* Navigation Header */
.nav-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: rgba(255, 255, 255, 0.95);
    padding: 15px 25px;
    border-radius: 12px;
    margin-bottom: 20px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

.home-btn {
    background: linear-gradient(135deg, #4CAF50 0%, #45a049 100%);
    color: white;
    text-decoration: none;
    padding: 10px 20px;
    border-radius: 8px;
    font-weight: bold;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.home-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(76, 175, 80, 0.3);
}

.game-title {
    color: #6B46C1;
    font-size: 1.8em;
    text-align: center;
    flex-grow: 1;
}

/* Main Game Container */
.game-container {
    display: grid;
    grid-template-columns: 270px 2fr 1fr;
    gap: 20px;
    max-width: 1400px;
    margin: 0 auto;
    min-height: 70vh;
}

/* Calculator Panel */
.calculator-panel {
    background: rgba(255, 255, 255, 0.95);
    border-radius: 12px;
    padding: 20px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    height: fit-content;
}

.calculator-panel h3 {
    color: #6B46C1;
    margin-bottom: 15px;
    font-size: 1.2em;
    text-align: center;
}

.calculator {
    width: 100%;
}

.calculator-display {
    background: linear-gradient(135deg, #2C3E50 0%, #34495E 100%);
    color: #ECF0F1;
    padding: 15px;
    border-radius: 8px;
    text-align: right;
    font-size: 1.8em;
    font-weight: bold;
    margin-bottom: 12px;
    min-height: 50px;
    display: flex;
    align-items: center;
    justify-content: flex-end;
    word-wrap: break-word;
    overflow-wrap: break-word;
}

.calculator-buttons {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 8px;
}

.calc-btn {
    padding: 15px;
    font-size: 1.2em;
    border: none;
    border-radius: 6px;
    background: linear-gradient(135deg, #ECF0F1 0%, #BDC3C7 100%);
    color: #2C3E50;
    cursor: pointer;
    transition: all 0.2s ease;
    font-weight: bold;
}

.calc-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
}

.calc-btn:active {
    transform: translateY(0);
}

.calc-btn.operator {
    background: linear-gradient(135deg, #3498DB 0%, #2980B9 100%);
    color: white;
}

.calc-btn.clear {
    background: linear-gradient(135deg, #E74C3C 0%, #C0392B 100%);
    color: white;
    grid-column: span 1;
}

.calc-btn.equals {
    background: linear-gradient(135deg, #27AE60 0%, #229954 100%);
    color: white;
    grid-column: span 1;
}

.calc-btn.transfer {
    background: linear-gradient(135deg, #6B46C1 0%, #805AD5 100%);
    color: white;
    grid-column: span 1;
    font-size: 1.4em;
}

/* Rules Reference Panel */
.rules-panel {
    background: rgba(255, 255, 255, 0.95);
    border-radius: 12px;
    padding: 20px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    height: fit-content;
}

.rules-panel h3 {
    color: #6B46C1;
    margin-bottom: 15px;
    font-size: 1.2em;
    text-align: center;
}

.rule-card {
    margin: 15px 0;
    padding: 15px;
    border-radius: 10px;
    border-left: 4px solid;
}

.rule-card.multiply {
    background: linear-gradient(135deg, #E3F2FD 0%, #BBDEFB 100%);
    border-left-color: #2196F3;
}

.rule-card.divide {
    background: linear-gradient(135deg, #FFF3E0 0%, #FFE0B2 100%);
    border-left-color: #FF9800;
}

.rule-card.power {
    background: linear-gradient(135deg, #F3E5F5 0%, #E1BEE7 100%);
    border-left-color: #9C27B0;
}

.rule-card.special {
    background: linear-gradient(135deg, #E8F5E9 0%, #C8E6C9 100%);
    border-left-color: #4CAF50;
}

.rule-card h4 {
    margin-bottom: 8px;
    font-size: 1.1em;
}

.rule-formula {
    font-size: 1.1em;
    font-weight: bold;
    margin: 8px 0;
    color: #333;
}

.rule-example {
    font-size: 0.9em;
    color: #555;
    margin: 5px 0;
}

.rule-tip {
    font-size: 0.85em;
    color: #666;
    font-style: italic;
    margin-top: 5px;
}

/* Game Area */
.game-area {
    background: rgba(255, 255, 255, 0.95);
    border-radius: 12px;
    padding: 30px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 500px;
}

.difficulty-selector {
    margin-bottom: 30px;
}

.difficulty-selector label {
    font-weight: bold;
    color: #6B46C1;
    margin-right: 10px;
}

.difficulty-selector select {
    padding: 8px 15px;
    border-radius: 6px;
    border: 2px solid #D6BCFA;
    font-size: 1em;
    background: white;
    color: #333;
}

/* Problem Display */
.problem-container {
    text-align: center;
    margin: 30px 0;
    padding: 30px;
    background: linear-gradient(135deg, #FAF5FF 0%, #F3E8FF 100%);
    border-radius: 12px;
    border: 2px solid #D6BCFA;
    width: 100%;
    max-width: 600px;
}

.problem-type {
    margin-bottom: 20px;
}

#problem-type-badge {
    display: inline-block;
    background: linear-gradient(135deg, #6B46C1 0%, #805AD5 100%);
    color: white;
    padding: 12px 24px;
    border-radius: 25px;
    font-size: 1.3em;
    font-weight: bold;
    box-shadow: 0 4px 10px rgba(107, 70, 193, 0.3);
    text-transform: uppercase;
    letter-spacing: 1px;
}

#problem-type-badge.multiply {
    background: linear-gradient(135deg, #2196F3 0%, #1976D2 100%);
}

#problem-type-badge.divide {
    background: linear-gradient(135deg, #FF9800 0%, #F57C00 100%);
}

#problem-type-badge.power {
    background: linear-gradient(135deg, #9C27B0 0%, #7B1FA2 100%);
}

#problem-type-badge.special {
    background: linear-gradient(135deg, #4CAF50 0%, #388E3C 100%);
}

.problem-display {
    font-size: 3em;
    font-weight: bold;
    color: #6B46C1;
    margin: 20px 0;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.1);
    line-height: 1.4;
}

.problem-hint {
    font-size: 1.2em;
    color: #333;
    font-weight: 600;
    margin-top: 15px;
    padding: 12px 20px;
    background: rgba(107, 70, 193, 0.1);
    border-radius: 8px;
    border-left: 4px solid #6B46C1;
}

/* Answer Section */
.answer-section {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 20px;
    width: 100%;
    max-width: 500px;
}

.answer-group {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
}

.answer-group label {
    font-weight: bold;
    color: #6B46C1;
    font-size: 1.1em;
}

#answer-input {
    width: 200px;
    padding: 12px 20px;
    font-size: 1.5em;
    text-align: center;
    border: 3px solid #D6BCFA;
    border-radius: 10px;
    outline: none;
    transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

#answer-input:focus {
    border-color: #6B46C1;
    box-shadow: 0 0 15px rgba(107, 70, 193, 0.3);
}

.button-group {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    justify-content: center;
}

button {
    padding: 12px 20px;
    border: none;
    border-radius: 8px;
    font-size: 1em;
    font-weight: bold;
    cursor: pointer;
    transition: all 0.3s ease;
}

#submit-btn {
    background: linear-gradient(135deg, #4CAF50 0%, #45a049 100%);
    color: white;
}

#show-work-btn {
    background: linear-gradient(135deg, #2196F3 0%, #1976D2 100%);
    color: white;
}

#skip-btn {
    background: linear-gradient(135deg, #f44336 0%, #d32f2f 100%);
    color: white;
}

button:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.2);
}

button:active {
    transform: translateY(0);
}

/* Feedback */
.feedback {
    margin-top: 20px;
    padding: 15px;
    border-radius: 8px;
    text-align: center;
    font-weight: bold;
    font-size: 1.1em;
    min-height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.feedback.correct {
    background: linear-gradient(135deg, #4CAF50 0%, #45a049 100%);
    color: white;
}

.feedback.incorrect {
    background: linear-gradient(135deg, #f44336 0%, #d32f2f 100%);
    color: white;
}

.feedback.neutral {
    background: #f0f0f0;
    color: #666;
}

/* Stats Panel */
.stats-panel {
    background: rgba(255, 255, 255, 0.95);
    border-radius: 12px;
    padding: 20px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    height: fit-content;
}

.stats-panel h3 {
    color: #6B46C1;
    margin-bottom: 20px;
    text-align: center;
}

.stat-item {
    display: flex;
    justify-content: space-between;
    margin: 10px 0;
    padding: 8px 0;
    border-bottom: 1px solid #D6BCFA;
}

.stat-label {
    font-weight: bold;
    color: #666;
}

.stat-value {
    font-weight: bold;
    color: #6B46C1;
}

/* Rule Mastery */
.rule-mastery {
    margin-top: 20px;
    padding-top: 15px;
    border-top: 2px solid #D6BCFA;
}

.rule-mastery h4 {
    color: #805AD5;
    margin-bottom: 15px;
    text-align: center;
}

.mastery-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.mastery-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 6px 10px;
    background: linear-gradient(135deg, #FAF5FF 0%, #F3E8FF 100%);
    border-radius: 6px;
    border: 1px solid #D6BCFA;
}

.mastery-label {
    font-size: 0.9em;
    font-weight: bold;
}

.mastery-count {
    background: #6B46C1;
    color: white;
    padding: 4px 8px;
    border-radius: 12px;
    font-size: 0.8em;
    font-weight: bold;
    min-width: 24px;
    text-align: center;
}

/* Achievements */
.achievements {
    margin-top: 20px;
    padding-top: 15px;
    border-top: 2px solid #D6BCFA;
}

.achievements h4 {
    color: #805AD5;
    margin-bottom: 10px;
    text-align: center;
}

.achievement-list {
    display: flex;
    flex-direction: column;
    gap: 5px;
}

.achievement {
    background: linear-gradient(135deg, #ff9800 0%, #e68900 100%);
    color: white;
    padding: 8px 12px;
    border-radius: 6px;
    font-size: 0.9em;
    text-align: center;
    animation: achievementPop 0.5s ease;
}

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

/* Modal */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
}

.modal-content {
    background-color: white;
    margin: 10% auto;
    padding: 30px;
    border-radius: 12px;
    width: 90%;
    max-width: 600px;
    position: relative;
}

.close {
    color: #aaa;
    float: right;
    font-size: 28px;
    font-weight: bold;
    cursor: pointer;
    position: absolute;
    right: 15px;
    top: 10px;
}

.close:hover {
    color: #000;
}

#work-content {
    margin-top: 20px;
    font-size: 1.1em;
    line-height: 1.8;
}

#work-content .step {
    background: #FAF5FF;
    padding: 15px;
    margin: 10px 0;
    border-radius: 8px;
    border-left: 4px solid #6B46C1;
}

/* Responsive Design */
@media (max-width: 1200px) {
    .game-container {
        grid-template-columns: 1fr;
        gap: 15px;
    }
    
    .calculator-panel,
    .stats-panel {
        order: 1;
    }
    
    .game-area {
        order: 0;
    }
}

@media (max-width: 768px) {
    body {
        padding: 10px;
    }
    
    .nav-header {
        flex-direction: column;
        gap: 10px;
        text-align: center;
    }
    
    .problem-display {
        font-size: 2em;
    }
    
    .game-area {
        padding: 20px;
        min-height: 400px;
    }
    
    .button-group {
        flex-direction: column;
        width: 100%;
    }
    
    button {
        width: 100%;
    }
}

@media (max-width: 480px) {
    .problem-display {
        font-size: 1.8em;
    }
    
    #answer-input {
        width: 100%;
        max-width: 250px;
    }
    
    .modal-content {
        width: 95%;
        margin: 10% auto;
    }
}