/* Algebra Study Tool Styles - Theme-Aware Modern UI */

@import url('themes.css');

* {
    box-sizing: border-box;
}

body {
    background-color: var(--primary-bg-color);
    color: var(--primary-text-color);
    min-height: 100vh;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 2rem;
}

.header-section {
    text-align: center;
    margin-bottom: 3rem;
    padding: 2rem;
    background-color: var(--header-bg-color);
    border-radius: 20px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
}

.header-section h1 {
    color: var(--header-text-color);
    font-size: 3rem;
    font-weight: 800;
    margin-bottom: 0.5rem;
}

.description {
    color: var(--secondary-text-color);
    font-size: 1.2rem;
    margin-bottom: 1.5rem;
    font-weight: 500;
}

.back-btn {
    background-color: var(--button-bg-color);
    color: var(--button-text-color);
    border: none;
    padding: 0.875rem 2rem;
    border-radius: 50px;
    cursor: pointer;
    font-size: 1rem;
    font-weight: 600;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

.back-btn:hover {
    background-color: var(--button-hover-bg-color);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
}

/* Topic Selection */
.topic-selection {
    margin-bottom: 2rem;
    padding: 2rem;
    background-color: var(--header-bg-color);
    border-radius: 20px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
}

.topic-selection h2 {
    color: var(--header-text-color);
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 2rem;
    text-align: center;
}

.topics-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.topic-card {
    background-color: var(--input-bg-color);
    color: #ffffff;
    padding: 2rem;
    border-radius: 16px;
    cursor: pointer;
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
    border: 2px solid transparent;
    position: relative;
    overflow: hidden;
}

.topic-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--button-bg-color);
    opacity: 0;
    transition: opacity 0.3s ease;
    z-index: 0;
}

.topic-card:hover {
    transform: translateY(-8px) scale(1.02);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.4);
    border-color: var(--button-bg-color);
}

.topic-card:hover::before {
    opacity: 0.1;
}

.topic-card h3 {
    margin-bottom: 0.75rem;
    font-size: 1.5rem;
    font-weight: 700;
    position: relative;
    z-index: 1;
    color: #ffffff;
}

.topic-card p {
    font-size: 1rem;
    opacity: 0.9;
    line-height: 1.5;
    position: relative;
    z-index: 1;
    color: #ffffff;
}

.topic-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
    display: block;
    position: relative;
    z-index: 1;
    filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.2));
}

/* Lesson Area */
.lesson-area {
    background-color: var(--header-bg-color);
    border-radius: 20px;
    padding: 2.5rem;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
}

.lesson-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    padding-bottom: 1.5rem;
    border-bottom: 3px solid var(--button-bg-color);
}

.lesson-header h2 {
    color: var(--header-text-color);
    margin: 0;
    font-size: 2rem;
    font-weight: 700;
}

.change-topic-btn {
    background-color: var(--button-bg-color);
    color: var(--button-text-color);
    border: none;
    padding: 0.75rem 1.5rem;
    border-radius: 50px;
    cursor: pointer;
    font-size: 0.95rem;
    font-weight: 600;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

.change-topic-btn:hover {
    background-color: var(--button-hover-bg-color);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
}

/* Theory Section */
.theory-section {
    margin-bottom: 2rem;
    padding: 2rem;
    background-color: var(--input-bg-color);
    border-radius: 16px;
    border-left: 5px solid var(--button-bg-color);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
}

.theory-section h3 {
    color: var(--primary-text-color);
    margin-bottom: 1.5rem;
    font-size: 1.5rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.theory-section h3::before {
    content: '💡';
    font-size: 1.5rem;
}

#theory-content {
    line-height: 1.9;
    color: var(--input-text-color);
    font-size: 1.05rem;
}

#theory-content p {
    margin-bottom: 1.25rem;
}

#theory-content .formula {
    background-color: var(--code-bg-color);
    padding: 1.5rem;
    border-radius: 12px;
    margin: 1.5rem 0;
    font-family: 'Courier New', monospace;
    font-size: 1.3rem;
    text-align: center;
    border: 2px solid var(--button-bg-color);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    font-weight: 600;
    color: var(--primary-text-color);
}

#theory-content ul {
    margin-left: 2rem;
    margin-bottom: 1.25rem;
}

#theory-content li {
    margin-bottom: 0.75rem;
    line-height: 1.6;
    position: relative;
    padding-left: 0.5rem;
    color: var(--input-text-color);
}

#theory-content li::marker {
    color: var(--button-bg-color);
    font-weight: bold;
}

/* Example Section */
.example-section {
    margin-bottom: 2rem;
    padding: 2rem;
    background-color: var(--input-bg-color);
    border-radius: 16px;
    border-left: 5px solid var(--button-bg-color);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
}

.example-section h3 {
    color: var(--primary-text-color);
    margin-bottom: 1.5rem;
    font-size: 1.5rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.example-section h3::before {
    content: '📝';
    font-size: 1.5rem;
}

.problem-display {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-text-color);
    padding: 2rem;
    background-color: var(--code-bg-color);
    border-radius: 12px;
    margin-bottom: 1.5rem;
    text-align: center;
    border: 3px solid var(--button-bg-color);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
    font-family: 'Courier New', monospace;
}

.show-solution-btn {
    background-color: var(--button-bg-color);
    color: var(--button-text-color);
    border: none;
    padding: 1rem 2rem;
    border-radius: 50px;
    cursor: pointer;
    font-size: 1.05rem;
    font-weight: 600;
    transition: all 0.3s ease;
    width: 100%;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

.show-solution-btn:hover {
    background-color: var(--button-hover-bg-color);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
}

/* Solution Section */
.solution-section {
    margin-bottom: 2rem;
    padding: 2rem;
    background-color: var(--input-bg-color);
    border-radius: 16px;
    border-left: 5px solid var(--button-bg-color);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
}

.solution-section h3 {
    color: var(--primary-text-color);
    margin-bottom: 1.5rem;
    font-size: 1.5rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.solution-section h3::before {
    content: '✅';
    font-size: 1.5rem;
}

#solution-steps {
    margin-bottom: 1.5rem;
}

.solution-step {
    background-color: var(--code-bg-color);
    padding: 2rem;
    border-radius: 12px;
    margin-bottom: 1.5rem;
    border: 2px solid var(--input-border-color);
    animation: slideIn 0.5s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    position: relative;
    overflow: hidden;
}

.solution-step::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 4px;
    background-color: var(--button-bg-color);
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateX(-20px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.step-number {
    background-color: var(--button-bg-color);
    color: var(--button-text-color);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.1rem;
    margin-right: 1rem;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
}

.step-explanation {
    color: var(--input-text-color);
    margin-top: 1rem;
    line-height: 1.8;
    font-size: 1.05rem;
    padding: 1rem;
    background-color: var(--input-bg-color);
    border-radius: 8px;
}

.step-math {
    font-family: 'Courier New', monospace;
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--primary-text-color);
    margin: 1rem 0;
    display: inline-block;
}

.solution-actions {
    display: flex;
    gap: 1rem;
    margin-top: 1rem;
}

.action-btn {
    background-color: var(--button-bg-color);
    color: var(--button-text-color);
    border: none;
    padding: 1rem 2rem;
    border-radius: 50px;
    cursor: pointer;
    font-size: 1.05rem;
    font-weight: 600;
    transition: all 0.3s ease;
    flex: 1;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

.action-btn:hover {
    background-color: var(--button-hover-bg-color);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
}

.action-btn.secondary {
    background-color: var(--dropdown-bg-color);
}

.action-btn.secondary:hover {
    background-color: var(--dropdown-hover-bg-color);
}

/* Practice Section */
.practice-section {
    margin-bottom: 2rem;
    padding: 2rem;
    background-color: var(--input-bg-color);
    border-radius: 16px;
    border-left: 5px solid var(--button-bg-color);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
}

.practice-section h3 {
    color: var(--primary-text-color);
    margin-bottom: 1.5rem;
    font-size: 1.5rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.practice-section h3::before {
    content: '✏️';
    font-size: 1.5rem;
}

.practice-problem {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-text-color);
    padding: 2rem;
    background-color: var(--code-bg-color);
    border-radius: 12px;
    margin-bottom: 1.5rem;
    text-align: center;
    border: 3px solid var(--button-bg-color);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
    font-family: 'Courier New', monospace;
}

.practice-input-area {
    display: flex;
    gap: 1rem;
    align-items: center;
    margin-bottom: 1.5rem;
}

.practice-input-area label {
    font-weight: 700;
    color: var(--primary-text-color);
    font-size: 1.1rem;
}

.practice-input-area input {
    flex: 1;
    padding: 1rem 1.5rem;
    border: 2px solid var(--input-border-color);
    border-radius: 12px;
    font-size: 1.1rem;
    font-family: 'Courier New', monospace;
    font-weight: 600;
    transition: all 0.3s ease;
    background-color: var(--input-bg-color);
    color: var(--input-text-color);
}

.practice-input-area input:focus {
    outline: none;
    border-color: var(--button-bg-color);
    box-shadow: var(--input-shadow);
    transform: scale(1.02);
}

.practice-feedback {
    padding: 1.5rem;
    border-radius: 12px;
    margin-bottom: 1rem;
    font-weight: 600;
    font-size: 1.05rem;
    animation: slideIn 0.3s ease-out;
    background-color: var(--input-bg-color);
    color: var(--primary-text-color);
    border: 3px solid var(--button-bg-color);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
}

.practice-feedback.correct {
    border-color: #10b981;
}

.practice-feedback.correct::before {
    content: '🎉 ';
    font-size: 1.3rem;
}

.practice-feedback.incorrect {
    border-color: #ef4444;
}

.practice-feedback.incorrect::before {
    content: '💭 ';
    font-size: 1.3rem;
}

#hint-btn {
    background-color: var(--dropdown-bg-color);
}

#hint-btn:hover {
    background-color: var(--dropdown-hover-bg-color);
}

/* Progress Tracker */
.progress-tracker {
    background-color: var(--header-bg-color);
    padding: 2.5rem;
    border-radius: 20px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
    margin-top: 2rem;
}

.progress-tracker h3 {
    color: var(--header-text-color);
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 2rem;
    text-align: center;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.progress-tracker h3::before {
    content: '📊';
    font-size: 2rem;
}

.progress-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 1.5rem;
}

.progress-stat {
    text-align: center;
    padding: 2rem;
    background-color: var(--input-bg-color);
    border-radius: 16px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
    border: 2px solid transparent;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.progress-stat::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--button-bg-color);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.progress-stat:hover {
    border-color: var(--button-bg-color);
    transform: translateY(-5px);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.3);
}

.progress-stat:hover::before {
    opacity: 0.1;
}

.progress-stat-value {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--primary-text-color);
    margin-bottom: 0.5rem;
    position: relative;
    z-index: 1;
}

.progress-stat-label {
    color: var(--secondary-text-color);
    font-size: 1rem;
    font-weight: 600;
    position: relative;
    z-index: 1;
}

/* Utility Classes */
.hidden {
    display: none !important;
}

/* Responsive Design */
@media (max-width: 768px) {
    .container {
        padding: 1rem;
    }

    .header-section {
        padding: 1.5rem;
    }

    .header-section h1 {
        font-size: 2rem;
    }

    .description {
        font-size: 1rem;
    }

    .topics-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }

    .topic-card {
        padding: 1.5rem;
    }

    .lesson-area {
        padding: 1.5rem;
    }

    .lesson-header {
        flex-direction: column;
        gap: 1rem;
        align-items: flex-start;
    }

    .lesson-header h2 {
        font-size: 1.5rem;
    }

    .theory-section,
    .example-section,
    .solution-section,
    .practice-section {
        padding: 1.5rem;
    }

    .theory-section h3,
    .example-section h3,
    .solution-section h3,
    .practice-section h3 {
        font-size: 1.25rem;
    }

    .problem-display,
    .practice-problem {
        font-size: 1.2rem;
        padding: 1.5rem;
    }

    .solution-step {
        padding: 1.5rem;
    }

    .step-math {
        font-size: 1.2rem;
    }

    .practice-input-area {
        flex-direction: column;
        align-items: stretch;
    }

    .solution-actions {
        flex-direction: column;
    }

    .progress-tracker {
        padding: 1.5rem;
    }

    .progress-stat {
        padding: 1.5rem;
    }

    .progress-stat-value {
        font-size: 2rem;
    }
}