/* Chemistry Subject - Color Variables */
:root {
    --chemistry-primary: #00ACC1;
    --chemistry-secondary: #26C6DA;
    --chemistry-accent: #84FFFF;
    --chemistry-light: #E0F7FA;
    --chemistry-dark: #007C91;
}

/* Hero Section Styling */
.subject-hero {
    background: linear-gradient(135deg, var(--chemistry-light) 0%, rgba(224, 247, 250, 0.8) 100%);
    padding: var(--spacing-xxl) 0;
}

.subject-hero-content h1 {
    color: var(--chemistry-dark);
}

.subject-hero-content .gradient-text {
    background: linear-gradient(90deg, var(--chemistry-primary), var(--chemistry-secondary));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.subject-description {
    color: var(--text-light);
    max-width: 600px;
    margin-bottom: var(--spacing-lg);
}

.section-header .gradient-text {
    background: linear-gradient(90deg, var(--chemistry-primary), var(--chemistry-secondary));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

/* Topics Section Styling */
.topic-card {
    transition: all 0.3s ease;
}

.topic-card:hover {
    border-color: var(--chemistry-secondary);
}

.topic-icon {
    background-color: rgba(0, 172, 193, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    width: 60px;
    height: 60px;
    border-radius: 50%;
    margin-bottom: var(--spacing-md);
}

.topic-icon i {
    font-size: 24px;
    color: var(--chemistry-primary);
}

/* AI Assistant Section */
.ai-assistant-section {
    background-color: var(--bg-color);
    padding: var(--spacing-xxl) 0;
}

.chat-header {
    background-color: var(--chemistry-primary);
    display: flex;
    align-items: center;
    padding: var(--spacing-md);
    border-radius: var(--border-radius-md) var(--border-radius-md) 0 0;
    color: white;
}

.chat-header i {
    font-size: 24px;
    margin-right: var(--spacing-sm);
}

.assistant-features .feature-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background-color: rgba(0, 172, 193, 0.1);
    margin-right: var(--spacing-md);
}

.assistant-features .feature-icon i {
    font-size: 20px;
    color: var(--chemistry-primary);
}

/* Logo styling */
.logo a {
    display: flex;
    align-items: center;
    text-decoration: none;
    color: var(--text-color);
}

.logo i {
    font-size: 24px;
    margin-right: var(--spacing-xs);
    color: var(--chemistry-primary);
}

/* Periodic Table Section */
.periodic-section {
    padding: var(--spacing-xxl) 0;
}

.periodic-container {
    background-color: var(--bg-color);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-md);
    position: relative;
}

.periodic-controls {
    margin-bottom: var(--spacing-lg);
}

.filter-options {
    margin-top: var(--spacing-md);
}

.filter-buttons {
    display: flex;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-xs);
    flex-wrap: wrap;
}

.filter-btn {
    padding: 0.5rem 1rem;
    background-color: var(--bg-color);
    border: 1px solid var(--bg-dark);
    border-radius: var(--border-radius-md);
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 0.9rem;
}

.filter-btn.active {
    background-color: var(--chemistry-primary);
    color: white;
    border-color: var(--chemistry-primary);
}

.periodic-display {
    min-height: 400px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--bg-dark);
    border-radius: var(--border-radius-md);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

/* Element Card Styling */
.element-info {
    margin-top: var(--spacing-lg);
}

.element-info.hidden {
    display: none;
}

.element-card {
    background-color: white;
    border-radius: var(--border-radius-md);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-md);
    border-top: 5px solid var(--chemistry-primary);
}

.element-name {
    margin-bottom: var(--spacing-md);
    color: var(--chemistry-dark);
}

.element-basics {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.element-symbol {
    font-size: 2.5rem;
    font-weight: bold;
    color: var(--chemistry-primary);
}

.element-number {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--text-light);
}

.element-properties {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

.property-item {
    display: flex;
    justify-content: space-between;
    border-bottom: 1px solid var(--bg-light);
    padding: var(--spacing-xs) 0;
}

.property-label {
    font-weight: 500;
    color: var(--text-color);
}

.property-value {
    color: var(--text-light);
}

.element-description {
    color: var(--text-light);
    line-height: 1.6;
}

/* Chemical Equation Solver Section */
.equation-section {
    padding: var(--spacing-xxl) 0;
}

.equation-container {
    background-color: var(--bg-color);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-md);
}

.equation-input {
    margin-bottom: var(--spacing-lg);
}

.equation-display {
    min-height: 200px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--bg-dark);
    border-radius: var(--border-radius-md);
    padding: var(--spacing-lg);
}

/* Animations */
@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

@keyframes bubbleRise {
    0% {
        transform: translateY(0) scale(1);
        opacity: 1;
    }
    100% {
        transform: translateY(-20px) scale(0.5);
        opacity: 0;
    }
}

.bubble {
    position: absolute;
    border-radius: 50%;
    background-color: rgba(132, 255, 255, 0.6);
    animation: bubbleRise 3s infinite ease-in-out;
}

/* Custom button styles */
.btn-primary {
    background-color: var(--chemistry-primary);
    border-color: var(--chemistry-primary);
}

.btn-primary:hover {
    background-color: var(--chemistry-dark);
    border-color: var(--chemistry-dark);
}

/* Quiz section customization */
.quiz-section .btn-primary {
    background-color: var(--chemistry-primary);
    border-color: var(--chemistry-primary);
}

.quiz-option.selected {
    background-color: var(--chemistry-secondary);
    border-color: var(--chemistry-secondary);
}

/* Responsive adjustments */
@media (max-width: 768px) {
    .filter-buttons {
        flex-direction: row;
        overflow-x: auto;
        padding-bottom: var(--spacing-sm);
    }
    
    .element-properties {
        grid-template-columns: 1fr;
    }
    
    .periodic-display {
        min-height: 300px;
    }
}

/* Profile Button styling */
.profile-button {
    display: flex;
    align-items: center;
    padding: var(--spacing-sm) var(--spacing-md);
    background-color: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-md);
    cursor: pointer;
    transition: all 0.3s ease;
}

.profile-button:hover {
    background-color: var(--bg-light);
}

.profile-button i {
    margin-right: var(--spacing-xs);
    color: var(--chemistry-primary);
    font-size: 18px;
}