/* THEME: GREY & GREEN */
.algebra-main-wrapper {
    max-width: 1100px;
    margin: 0 auto;
    padding: 20px;
    background-color: #f0f2f2;
    font-family: 'Segoe UI', Arial, sans-serif;
}

.calc-card {
    background: #ffffff;
    border: 2px solid #40916c;
    border-radius: 15px;
    padding: 25px;
    margin-bottom: 30px;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.05);
    display: flex;
    flex-direction: column;
}

.calc-card h2, .calc-card h3 { 
    color: #1b4332; 
    margin-top: 0;
    border-bottom: 2px solid #b7e4c7;
    padding-bottom: 10px;
}

.input-row {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    margin-bottom: 15px;
}

.input-row input, .input-row select {
    flex: 1;
    padding: 12px;
    border: 1px solid #d1d5db;
    border-radius: 8px;
    font-size: 15px;
    outline: none;
}

.matrix-row {
    display: flex;
    gap: 10px;
    margin-bottom: 10px;
    justify-content: center;
}

.matrix-row input {
    width: 60px;
    text-align: center;
    padding: 12px;
    border: 1px solid #d1d5db;
    border-radius: 8px;
    font-size: 15px;
    outline: none;
}

.btn-group { display: flex; gap: 10px; margin-top: auto; }

.solve-btn {
    flex: 2;
    background: #40916c;
    color: white;
    border: none;
    padding: 12px;
    border-radius: 8px;
    font-weight: bold;
    cursor: pointer;
    transition: 0.3s;
}

.solve-btn:hover { background: #2d6a4f; }

.clear-btn {
    flex: 1;
    background: #e5e7eb;
    color: #374151;
    border: 1px solid #d1d5db;
    padding: 12px;
    border-radius: 8px;
    cursor: pointer;
}

.step-container {
    background: #f1f8f5;
    border-left: 6px solid #40916c;
    padding: 20px;
    border-radius: 4px;
    display: none;
    color: #1b4332;
    margin-top: 20px;
    font-size: 15px;
    line-height: 1.8;
}

.step-line {
    margin-bottom: 8px;
    border-bottom: 1px dashed #b7e4c7;
    padding-bottom: 5px;
}

.final-ans {
    font-size: 18px;
    font-weight: bold;
    color: #2d6a4f;
    margin-top: 15px;
    background: #d8f3dc;
    padding: 10px;
    border-radius: 5px;
    text-align: center;
}

.algebra-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 20px;
}

@media (max-width: 600px) {
    .algebra-grid {
        grid-template-columns: 1fr;
    }
}